]> git.saurik.com Git - wxWidgets.git/blobdiff - wxPython/wx/lib/masked/maskededit.py
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[wxWidgets.git] / wxPython / wx / lib / masked / maskededit.py
diff --git a/wxPython/wx/lib/masked/maskededit.py b/wxPython/wx/lib/masked/maskededit.py
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-#----------------------------------------------------------------------------
-# Name:         maskededit.py
-# Authors:      Will Sadkin, Jeff Childers
-# Email:        wsadkin@parlancecorp.com, jchilders_98@yahoo.com
-# Created:      02/11/2003
-# Copyright:    (c) 2003 by Jeff Childers, Will Sadkin, 2003
-# Portions:     (c) 2002 by Will Sadkin, 2002-2007
-# RCS-ID:       $Id$
-# License:      wxWidgets license
-#----------------------------------------------------------------------------
-# NOTE:
-#   MaskedEdit controls are based on a suggestion made on [wxPython-Users] by
-#   Jason Hihn, and borrows liberally from Will Sadkin's original masked edit
-#   control for time entry, TimeCtrl (which is now rewritten using this
-#   control!).
-#
-#   MaskedEdit controls do not normally use validators, because they do
-#   careful manipulation of the cursor in the text window on each keystroke,
-#   and validation is cursor-position specific, so the control intercepts the
-#   key codes before the validator would fire.  However, validators can be
-#   provided to do data transfer to the controls.
-#
-#----------------------------------------------------------------------------
-#
-# This file now contains the bulk of the logic behind all masked controls,
-# the MaskedEditMixin class, the Field class, and the autoformat codes.
-#
-#----------------------------------------------------------------------------
-#
-# 03/30/2004 - Will Sadkin (wsadkin@parlancecorp.com)
-#
-# o Split out TextCtrl, ComboBox and IpAddrCtrl into their own files,
-# o Reorganized code into masked package
-#
-# 12/09/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o Updated for wx namespace. No guarantees. This is one huge file.
-#
-# 12/13/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o Missed wx.DateTime stuff earlier.
-#
-# 12/20/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o MaskedEditMixin -> MaskedEditMixin
-# o wxMaskedTextCtrl -> maskedTextCtrl
-# o wxMaskedComboBoxSelectEvent -> MaskedComboBoxSelectEvent
-# o wxMaskedComboBox -> MaskedComboBox
-# o wxIpAddrCtrl -> IpAddrCtrl
-# o wxTimeCtrl -> TimeCtrl
-#
-
-__doc__ = """\
-contains MaskedEditMixin class that drives all the other masked controls.
-
-====================
-Masked Edit Overview
-====================
-
-masked.TextCtrl:
-    is a sublassed text control that can carefully control the user's input
-    based on a mask string you provide.
-
-    General usage example::
-
-        control = masked.TextCtrl( win, -1, '', mask = '(###) ###-####')
-
-    The example above will create a text control that allows only numbers to be
-    entered and then only in the positions indicated in the mask by the # sign.
-
-masked.ComboBox:
-    is a similar subclass of wxComboBox that allows the same sort of masking,
-    but also can do auto-complete of values, and can require the value typed
-    to be in the list of choices to be colored appropriately.
-
-masked.Ctrl:
-    is actually a factory function for several types of masked edit controls:
-
-    =================   ==================================================
-    masked.TextCtrl     standard masked edit text box
-    masked.ComboBox     adds combobox capabilities
-    masked.IpAddrCtrl   adds special semantics for IP address entry
-    masked.TimeCtrl     special subclass handling lots of types as values
-    masked.NumCtrl      special subclass handling numeric values
-    =================   ==================================================
-
-    It works by looking for a *controlType* parameter in the keyword
-    arguments of the control, to determine what kind of instance to return.
-    If not specified as a keyword argument, the default control type returned
-    will be masked.TextCtrl.
-
-    Each of the above classes has its own set of arguments, but masked.Ctrl
-    provides a single "unified" interface for masked controls.
-
-What follows is a description of how to configure the generic masked.TextCtrl
-and masked.ComboBox;  masked.NumCtrl and masked.TimeCtrl have their own demo 
-pages and interface descriptions.
-
-=========================
-
-Initialization Parameters
--------------------------
-mask
-    Allowed mask characters and function:
-
-    =========  ==========================================================
-    Character   Function
-    =========  ==========================================================
-        #       Allow numeric only (0-9)
-        N       Allow letters and numbers (0-9)
-        A       Allow uppercase letters only
-        a       Allow lowercase letters only
-        C       Allow any letter, upper or lower
-        X       Allow string.letters, string.punctuation, string.digits
-        &       Allow string.punctuation only (doesn't include all unicode symbols)
-        \*       Allow any visible character
-        |       explicit field boundary (takes no space in the control; allows mix
-                of adjacent mask characters to be treated as separate fields,
-                eg: '&|###' means "field 0 = '&', field 1 = '###'", but there's
-                no fixed characters in between.
-    =========  ==========================================================
-
-
-    These controls define these sets of characters using string.letters,
-    string.uppercase, etc.  These sets are affected by the system locale
-    setting, so in order to have the masked controls accept characters
-    that are specific to your users' language, your application should
-    set the locale.
-    For example, to allow international characters to be used in the
-    above masks, you can place the following in your code as part of
-    your application's initialization code::
-
-      import locale
-      locale.setlocale(locale.LC_ALL, '')
-
-    The controls now also support (by popular demand) all "visible" characters,
-    by use of the * mask character, including unicode characters above
-    the standard ANSI keycode range.
-    Note:  As string.punctuation doesn't typically include all unicode
-    symbols, you will have to use includechars to get some of these into 
-    otherwise restricted positions in your control, such as those specified
-    with &.
-
-  Using these mask characters, a variety of template masks can be built. See
-  the demo for some other common examples include date+time, social security
-  number, etc.  If any of these characters are needed as template rather
-  than mask characters, they can be escaped with \, ie. \N means "literal N".
-  (use \\ for literal backslash, as in: r'CCC\\NNN'.)
-
-
-  *Note:*
-      Masks containing only # characters and one optional decimal point
-      character are handled specially, as "numeric" controls.  Such
-      controls have special handling for typing the '-' key, handling
-      the "decimal point" character as truncating the integer portion,
-      optionally allowing grouping characters and so forth.
-      There are several parameters and format codes that only make sense
-      when combined with such masks, eg. groupChar, decimalChar, and so
-      forth (see below).  These allow you to construct reasonable
-      numeric entry controls.
-
-  *Note:*
-      Changing the mask for a control deletes any previous field classes
-      (and any associated validation or formatting constraints) for them.
-
-useFixedWidthFont
-  By default, masked edit controls use a fixed width font, so that
-  the mask characters are fixed within the control, regardless of
-  subsequent modifications to the value.  Set to False if having
-  the control font be the same as other controls is required. (This is
-  a control-level parameter.)
-
-defaultEncoding
-  (Applies to unicode systems only) By default, the default unicode encoding
-  used is latin1, or iso-8859-1.  If necessary, you can set this control-level
-  parameter to govern the codec used to decode your keyboard inputs.
-  (This is a control-level parameter.)
-
-formatcodes
-  These other properties can be passed to the class when instantiating it:
-    Formatcodes are specified as a string of single character formatting
-    codes that modify  behavior of the control::
-    
-            _  Allow spaces
-            !  Force upper
-            ^  Force lower
-            R  Right-align field(s)
-            r  Right-insert in field(s) (implies R)
-            <  Stay in field until explicit navigation out of it
-
-            >  Allow insert/delete within partially filled fields (as
-               opposed to the default "overwrite" mode for fixed-width
-               masked edit controls.)  This allows single-field controls
-               or each field within a multi-field control to optionally
-               behave more like standard text controls.
-               (See EMAIL or phone number autoformat examples.)
-
-               *Note: This also governs whether backspace/delete operations
-               shift contents of field to right of cursor, or just blank the
-               erased section.
-
-               Also, when combined with 'r', this indicates that the field
-               or control allows right insert anywhere within the current
-               non-empty value in the field.  (Otherwise right-insert behavior
-               is only performed to when the entire right-insertable field is
-               selected or the cursor is at the right edge of the field.*
-
-
-            ,  Allow grouping character in integer fields of numeric controls
-               and auto-group/regroup digits (if the result fits) when leaving
-               such a field.  (If specified, .SetValue() will attempt to
-               auto-group as well.)
-               ',' is also the default grouping character.  To change the
-               grouping character and/or decimal character, use the groupChar
-               and decimalChar parameters, respectively.
-               Note: typing the "decimal point" character in such fields will
-               clip the value to that left of the cursor for integer
-               fields of controls with "integer" or "floating point" masks.
-               If the ',' format code is specified, this will also cause the
-               resulting digits to be regrouped properly, using the current
-               grouping character.
-            -  Prepend and reserve leading space for sign to mask and allow
-               signed values (negative #s shown in red by default.) Can be
-               used with argument useParensForNegatives (see below.)
-            0  integer fields get leading zeros
-            D  Date[/time] field
-            T  Time field
-            F  Auto-Fit: the control calulates its size from
-               the length of the template mask
-            V  validate entered chars against validRegex before allowing them
-               to be entered vs. being allowed by basic mask and then having
-               the resulting value just colored as invalid.
-               (See USSTATE autoformat demo for how this can be used.)
-            S  select entire field when navigating to new field
-
-fillChar
-
-defaultValue
-  These controls have two options for the initial state of the control.
-  If a blank control with just the non-editable characters showing
-  is desired, simply leave the constructor variable fillChar as its
-  default (' ').  If you want some other character there, simply
-  change the fillChar to that value.  Note: changing the control's fillChar
-  will implicitly reset all of the fields' fillChars to this value.
-
-  If you need different default characters in each mask position,
-  you can specify a defaultValue parameter in the constructor, or
-  set them for each field individually.
-  This value must satisfy the non-editable characters of the mask,
-  but need not conform to the replaceable characters.
-
-groupChar
-
-decimalChar
-  These parameters govern what character is used to group numbers
-  and is used to indicate the decimal point for numeric format controls.
-  The default groupChar is ',', the default decimalChar is '.'
-  By changing these, you can customize the presentation of numbers
-  for your location.
-
-  Eg::
-
-        formatcodes = ',', groupChar='\''                  allows  12'345.34
-        formatcodes = ',', groupChar='.', decimalChar=','  allows  12.345,34
-
-  (These are control-level parameters.)
-
-shiftDecimalChar
-  The default "shiftDecimalChar" (used for "backwards-tabbing" until
-  shift-tab is fixed in wxPython) is '>' (for QUERTY keyboards.) for
-  other keyboards, you may want to customize this, eg '?' for shift ',' on
-  AZERTY keyboards, ':' or ';' for other European keyboards, etc.
-  (This is a control-level parameter.)
-
-useParensForNegatives=False
-  This option can be used with signed numeric format controls to
-  indicate signs via () rather than '-'.
-  (This is a control-level parameter.)
-
-autoSelect=False
-  This option can be used to have a field or the control try to
-  auto-complete on each keystroke if choices have been specified.
-
-autoCompleteKeycodes=[]
-  By default, DownArrow, PageUp and PageDown will auto-complete a
-  partially entered field.  Shift-DownArrow, Shift-UpArrow, PageUp
-  and PageDown will also auto-complete, but if the field already
-  contains a matched value, these keys will cycle through the list
-  of choices forward or backward as appropriate.  Shift-Up and
-  Shift-Down also take you to the next/previous field after any
-  auto-complete action.
-
-  Additional auto-complete keys can be specified via this parameter.
-  Any keys so specified will act like PageDown.
-  (This is a control-level parameter.)
-
-
-
-Validating User Input
-=====================
-There are a variety of initialization parameters that are used to validate
-user input.  These parameters can apply to the control as a whole, and/or
-to individual fields:
-
-        =====================  ==================================================================
-        excludeChars           A string of characters to exclude even if otherwise allowed
-        includeChars           A string of characters to allow even if otherwise disallowed
-        validRegex             Use a regular expression to validate the contents of the text box
-        validRange             Pass a rangeas list (low,high) to limit numeric fields/values
-        choices                A list of strings that are allowed choices for the control.
-        choiceRequired         value must be member of choices list
-        compareNoCase          Perform case-insensitive matching when validating against list
-                               *Note: for masked.ComboBox, this defaults to True.*
-        emptyInvalid           Boolean indicating whether an empty value should be considered 
-                               invalid
-
-        validFunc              A function to call of the form: bool = func(candidate_value)
-                               which will return True if the candidate_value satisfies some
-                               external criteria for the control in addition to the the
-                               other validation, or False if not.  (This validation is
-                               applied last in the chain of validations.)
-
-        validRequired          Boolean indicating whether or not keys that are allowed by the
-                               mask, but result in an invalid value are allowed to be entered
-                               into the control.  Setting this to True implies that a valid
-                               default value is set for the control.
-
-        retainFieldValidation  False by default; if True, this allows individual fields to
-                               retain their own validation constraints independently of any
-                               subsequent changes to the control's overall parameters.
-                               (This is a control-level parameter.)
-
-        validator              Validators are not normally needed for masked controls, because
-                               of the nature of the validation and control of input.  However,
-                               you can supply one to provide data transfer routines for the
-                               controls.
-        raiseOnInvalidPaste    False by default; normally a bad paste simply is ignored with a bell;
-                               if True, this will cause a ValueError exception to be thrown,
-                               with the .value attribute of the exception containing the bad value.
-
-        stopFieldChangeIfInvalid
-                               False by default; tries to prevent navigation out of a field if its
-                               current value is invalid.  Can be used to create a hybrid of validation
-                               settings, allowing intermediate invalid values in a field without
-                               sacrificing ability to limit values as with validRequired.
-                               NOTE: It is possible to end up with an invalid value when using
-                                 this option if focus is switched to some other control via mousing.
-                                 To avoid this, consider deriving a class that defines _LostFocus()
-                                 function that returns the control to a valid value when the focus
-                                 shifts.  (AFAICT, The change in focus is unpreventable.)
-        =====================  =================================================================
-
-
-Coloring Behavior
-=================
-  The following parameters have been provided to allow you to change the default
-  coloring behavior of the control.   These can be set at construction, or via
-  the .SetCtrlParameters() function.  Pass a color as string e.g. 'Yellow':
-
-        ========================  =======================================================================
-        emptyBackgroundColour      Control Background color when identified as empty. Default=White
-        invalidBackgroundColour    Control Background color when identified as Not valid. Default=Yellow
-        validBackgroundColour      Control Background color when identified as Valid. Default=white
-        ========================  =======================================================================
-
-
-  The following parameters control the default foreground color coloring behavior of the
-  control. Pass a color as string e.g. 'Yellow':
-
-        ========================  ======================================================================
-        foregroundColour           Control foreground color when value is not negative.  Default=Black
-        signedForegroundColour     Control foreground color when value is negative. Default=Red
-        ========================  ======================================================================
-
-
-Fields
-======
-  Each part of the mask that allows user input is considered a field.  The fields
-  are represented by their own class instances.  You can specify field-specific
-  constraints by constructing or accessing the field instances for the control
-  and then specifying those constraints via parameters.
-
-fields
-  This parameter allows you to specify Field instances containing
-  constraints for the individual fields of a control, eg: local
-  choice lists, validation rules, functions, regexps, etc.
-  It can be either an ordered list or a dictionary.  If a list,
-  the fields will be applied as fields 0, 1, 2, etc.
-  If a dictionary, it should be keyed by field index.
-  the values should be a instances of maskededit.Field.
-
-  Any field not represented by the list or dictionary will be
-  implicitly created by the control.
-
-  Eg::
-
-    fields = [ Field(formatcodes='_r'), Field('choices=['a', 'b', 'c']) ]
-    
-  Or::
-
-    fields = {
-               1: ( Field(formatcodes='_R', choices=['a', 'b', 'c']),
-               3: ( Field(choices=['01', '02', '03'], choiceRequired=True)
-             }
-
-  The following parameters are available for individual fields, with the
-  same semantics as for the whole control but applied to the field in question:
-
-    ==============  =============================================================================
-    fillChar        if set for a field, it will override the control's fillChar for that field
-    groupChar       if set for a field, it will override the control's default
-    defaultValue    sets field-specific default value; overrides any default from control
-    compareNoCase   overrides control's settings
-    emptyInvalid    determines whether field is required to be filled at all times
-    validRequired   if set, requires field to contain valid value
-    ==============  =============================================================================
-
-  If any of the above parameters are subsequently specified for the control as a
-  whole, that new value will be propagated to each field, unless the
-  retainFieldValidation control-level parameter is set.
-
-    ==============  ==============================
-    formatcodes      Augments control's settings
-    excludeChars         '       '        '
-    includeChars         '       '        '
-    validRegex           '       '        '
-    validRange           '       '        '
-    choices              '       '        '
-    choiceRequired       '       '        '
-    validFunc            '       '        '
-    ==============  ==============================
-
-
-
-Control Class Functions
-=======================
-.GetPlainValue(value=None)
-                    Returns the value specified (or the control's text value
-                    not specified) without the formatting text.
-                    In the example above, might return phone no='3522640075',
-                    whereas control.GetValue() would return '(352) 264-0075'
-.ClearValue()
-                    Returns the control's value to its default, and places the
-                    cursor at the beginning of the control.
-.SetValue()
-                    Does "smart replacement" of passed value into the control, as does
-                    the .Paste() method.  As with other text entry controls, the
-                    .SetValue() text replacement begins at left-edge of the control,
-                    with missing mask characters inserted as appropriate.
-                    .SetValue will also adjust integer, float or date mask entry values,
-                    adding commas, auto-completing years, etc. as appropriate.
-                    For "right-aligned" numeric controls, it will also now automatically
-                    right-adjust any value whose length is less than the width of the
-                    control before attempting to set the value.
-                    If a value does not follow the format of the control's mask, or will
-                    not fit into the control, a ValueError exception will be raised.
-
-                    Eg::
-
-                      mask = '(###) ###-####'
-                          .SetValue('1234567890')           => '(123) 456-7890'
-                          .SetValue('(123)4567890')         => '(123) 456-7890'
-                          .SetValue('(123)456-7890')        => '(123) 456-7890'
-                          .SetValue('123/4567-890')         => illegal paste; ValueError
-
-                      mask = '#{6}.#{2}', formatcodes = '_,-',
-                          .SetValue('111')                  => ' 111   .  '
-                          .SetValue(' %9.2f' % -111.12345 ) => '   -111.12'
-                          .SetValue(' %9.2f' % 1234.00 )    => '  1,234.00'
-                          .SetValue(' %9.2f' % -1234567.12345 ) => insufficient room; ValueError
-
-                      mask = '#{6}.#{2}', formatcodes = '_,-R'  # will right-adjust value for right-aligned control
-                          .SetValue('111')                  => padded value misalignment ValueError: "       111" will not fit
-                          .SetValue('%.2f' % 111 )          => '    111.00'
-                          .SetValue('%.2f' % -111.12345 )   => '   -111.12'
-
-
-.IsValid(value=None)
-                    Returns True if the value specified (or the value of the control
-                    if not specified) passes validation tests
-.IsEmpty(value=None)
-                    Returns True if the value specified (or the value of the control
-                    if not specified) is equal to an "empty value," ie. all
-                    editable characters == the fillChar for their respective fields.
-.IsDefault(value=None)
-                    Returns True if the value specified (or the value of the control
-                    if not specified) is equal to the initial value of the control.
-
-.Refresh()
-                    Recolors the control as appropriate to its current settings.
-
-.SetCtrlParameters(\*\*kwargs)
-                    This function allows you to set up and/or change the control parameters
-                    after construction; it takes a list of key/value pairs as arguments,
-                    where the keys can be any of the mask-specific parameters in the constructor.
-
-                    Eg::
-
-                        ctl = masked.TextCtrl( self, -1 )
-                        ctl.SetCtrlParameters( mask='###-####',
-                                               defaultValue='555-1212',
-                                               formatcodes='F')
-
-.GetCtrlParameter(parametername)
-                    This function allows you to retrieve the current value of a parameter
-                    from the control.
-
-  *Note:* Each of the control parameters can also be set using its
-      own Set and Get function.  These functions follow a regular form:
-      All of the parameter names start with lower case; for their
-      corresponding Set/Get function, the parameter name is capitalized.
-
-    Eg::
-
-          ctl.SetMask('###-####')
-          ctl.SetDefaultValue('555-1212')
-          ctl.GetChoiceRequired()
-          ctl.GetFormatcodes()
-
-  *Note:* After any change in parameters, the choices for the
-      control are reevaluated to ensure that they are still legal.  If you
-      have large choice lists, it is therefore more efficient to set parameters
-      before setting the choices available.
-
-.SetFieldParameters(field_index, \*\*kwargs)
-                    This function allows you to specify change individual field
-                    parameters after construction. (Indices are 0-based.)
-
-.GetFieldParameter(field_index, parametername)
-                    Allows the retrieval of field parameters after construction
-
-
-The control detects certain common constructions. In order to use the signed feature
-(negative numbers and coloring), the mask has to be all numbers with optionally one
-decimal point. Without a decimal (e.g. '######', the control will treat it as an integer
-value. With a decimal (e.g. '###.##'), the control will act as a floating point control
-(i.e. press decimal to 'tab' to the decimal position). Pressing decimal in the
-integer control truncates the value.  However, for a true numeric control,
-masked.NumCtrl provides all this, and true numeric input/output support as well.
-
-
-Check your controls by calling each control's .IsValid() function and the
-.IsEmpty() function to determine which controls have been a) filled in and
-b) filled in properly.
-
-
-Regular expression validations can be used flexibly and creatively.
-Take a look at the demo; the zip-code validation succeeds as long as the
-first five numerals are entered. the last four are optional, but if
-any are entered, there must be 4 to be valid.
-
-masked.Ctrl Configuration
-=========================
-masked.Ctrl works by looking for a special *controlType*
-parameter in the variable arguments of the control, to determine
-what kind of instance to return.
-controlType can be one of::
-
-    controlTypes.TEXT
-    controlTypes.COMBO
-    controlTypes.IPADDR
-    controlTypes.TIME
-    controlTypes.NUMBER
-
-These constants are also available individually, ie, you can
-use either of the following::
-
-    from wxPython.wx.lib.masked import MaskedCtrl, controlTypes
-    from wxPython.wx.lib.masked import MaskedCtrl, COMBO, TEXT, NUMBER, IPADDR
-
-If not specified as a keyword argument, the default controlType is
-controlTypes.TEXT.
-
-"""
-
-"""
-+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-DEVELOPER COMMENTS:
-
-Naming Conventions
-------------------
-  All methods of the Mixin that are not meant to be exposed to the external
-  interface are prefaced with '_'.  Those functions that are primarily
-  intended to be internal subroutines subsequently start with a lower-case
-  letter; those that are primarily intended to be used and/or overridden
-  by derived subclasses start with a capital letter.
-
-  The following methods must be used and/or defined when deriving a control
-  from MaskedEditMixin.  NOTE: if deriving from a *masked edit* control
-  (eg. class IpAddrCtrl(masked.TextCtrl) ), then this is NOT necessary,
-  as it's already been done for you in the base class.
-
-        ._SetInitialValue()
-                        This function must be called after the associated base
-                        control has been initialized in the subclass __init__
-                        function.  It sets the initial value of the control,
-                        either to the value specified if non-empty, the
-                        default value if specified, or the "template" for
-                        the empty control as necessary.  It will also set/reset
-                        the font if necessary and apply formatting to the
-                        control at this time.
-
-        ._GetSelection()
-                        REQUIRED
-                        Each class derived from MaskedEditMixin must define
-                        the function for getting the start and end of the
-                        current text selection.  The reason for this is
-                        that not all controls have the same function name for
-                        doing this; eg. wx.TextCtrl uses .GetSelection(),
-                        whereas we had to write a .GetMark() function for
-                        wxComboBox, because .GetSelection() for the control
-                        gets the currently selected list item from the combo
-                        box, and the control doesn't (yet) natively provide
-                        a means of determining the text selection.
-        ._SetSelection()
-                        REQUIRED
-                        Similarly to _GetSelection, each class derived from
-                        MaskedEditMixin must define the function for setting
-                        the start and end of the current text selection.
-                        (eg. .SetSelection() for masked.TextCtrl, and .SetMark() for
-                        masked.ComboBox.
-
-        ._GetInsertionPoint()
-        ._SetInsertionPoint()
-                        REQUIRED
-                        For consistency, and because the mixin shouldn't rely
-                        on fixed names for any manipulations it does of any of
-                        the base controls, we require each class derived from
-                        MaskedEditMixin to define these functions as well.
-
-        ._GetValue()
-        ._SetValue()    REQUIRED
-                        Each class derived from MaskedEditMixin must define
-                        the functions used to get and set the raw value of the
-                        control.
-                        This is necessary so that recursion doesn't take place
-                        when setting the value, and so that the mixin can
-                        call the appropriate function after doing all its
-                        validation and manipulation without knowing what kind
-                        of base control it was mixed in with.  To handle undo
-                        functionality, the ._SetValue() must record the current
-                        selection prior to setting the value.
-
-        .Cut()
-        .Paste()
-        .Undo()
-        .SetValue()     REQUIRED
-                        Each class derived from MaskedEditMixin must redefine
-                        these functions to call the _Cut(), _Paste(), _Undo()
-                        and _SetValue() methods, respectively for the control,
-                        so as to prevent programmatic corruption of the control's
-                        value.  This must be done in each derivation, as the
-                        mixin cannot itself override a member of a sibling class.
-
-        ._Refresh()     REQUIRED
-                        Each class derived from MaskedEditMixin must define
-                        the function used to refresh the base control.
-
-        .Refresh()      REQUIRED
-                        Each class derived from MaskedEditMixin must redefine
-                        this function so that it checks the validity of the
-                        control (via self._CheckValid) and then refreshes
-                        control using the base class method.
-
-        ._IsEditable()  REQUIRED
-                        Each class derived from MaskedEditMixin must define
-                        the function used to determine if the base control is
-                        editable or not.  (For masked.ComboBox, this has to
-                        be done with code, rather than specifying the proper
-                        function in the base control, as there isn't one...)
-        ._CalcSize()    REQUIRED
-                        Each class derived from MaskedEditMixin must define
-                        the function used to determine how wide the control
-                        should be given the mask.  (The mixin function
-                        ._calcSize() provides a baseline estimate.)
-
-
-Event Handling
---------------
-  Event handlers are "chained", and MaskedEditMixin usually
-  swallows most of the events it sees, thereby preventing any other
-  handlers from firing in the chain.  It is therefore required that
-  each class derivation using the mixin to have an option to hook up
-  the event handlers itself or forego this operation and let a
-  subclass of the masked control do so.  For this reason, each
-  subclass should probably include the following code:
-
-    if setupEventHandling:
-        ## Setup event handlers
-        EVT_SET_FOCUS( self, self._OnFocus )        ## defeat automatic full selection
-        EVT_KILL_FOCUS( self, self._OnKillFocus )   ## run internal validator
-        EVT_LEFT_DCLICK(self, self._OnDoubleClick)  ## select field under cursor on dclick
-        EVT_RIGHT_UP(self, self._OnContextMenu )    ## bring up an appropriate context menu
-        EVT_KEY_DOWN( self, self._OnKeyDown )       ## capture control events not normally seen, eg ctrl-tab.
-        EVT_CHAR( self, self._OnChar )              ## handle each keypress
-        EVT_TEXT( self, self.GetId(), self._OnTextChange )  ## color control appropriately & keep
-                                                            ## track of previous value for undo
-
-  where setupEventHandling is an argument to its constructor.
-
-  These 5 handlers must be "wired up" for the masked edit
-  controls to provide default behavior.  (The setupEventHandling
-  is an argument to masked.TextCtrl and masked.ComboBox, so
-  that controls derived from *them* may replace one of these
-  handlers if they so choose.)
-
-  If your derived control wants to preprocess events before
-  taking action, it should then set up the event handling itself,
-  so it can be first in the event handler chain.
-
-
-  The following routines are available to facilitate changing
-  the default behavior of masked edit controls:
-
-        ._SetKeycodeHandler(keycode, func)
-        ._SetKeyHandler(char, func)
-                        Use to replace default handling for any given keycode.
-                        func should take the key event as argument and return
-                        False if no further action is required to handle the
-                        key. Eg:
-                            self._SetKeycodeHandler(WXK_UP, self.IncrementValue)
-                            self._SetKeyHandler('-', self._OnChangeSign)
-
-        (Setting a func of None removes any keyhandler for the given key.)
-        
-        "Navigation" keys are assumed to change the cursor position, and
-        therefore don't cause automatic motion of the cursor as insertable
-        characters do.
-
-        ._AddNavKeycode(keycode, handler=None)
-        ._AddNavKey(char, handler=None)
-                        Allows controls to specify other keys (and optional handlers)
-                        to be treated as navigational characters. (eg. '.' in IpAddrCtrl)
-
-        ._GetNavKeycodes()  Returns the current list of navigational keycodes.
-
-        ._SetNavKeycodes(key_func_tuples)
-                        Allows replacement of the current list of keycode
-                        processed as navigation keys, and bind associated
-                        optional keyhandlers. argument is a list of key/handler
-                        tuples.  Passing a value of None for the handler in a
-                        given tuple indicates that default processing for the key
-                        is desired.
-
-        ._FindField(pos) Returns the Field object associated with this position
-                        in the control.
-
-        ._FindFieldExtent(pos, getslice=False, value=None)
-                        Returns edit_start, edit_end of the field corresponding
-                        to the specified position within the control, and
-                        optionally also returns the current contents of that field.
-                        If value is specified, it will retrieve the slice the corresponding
-                        slice from that value, rather than the current value of the
-                        control.
-
-        ._AdjustField(pos)
-                        This is, the function that gets called for a given position
-                        whenever the cursor is adjusted to leave a given field.
-                        By default, it adjusts the year in date fields if mask is a date,
-                        It can be overridden by a derived class to
-                        adjust the value of the control at that time.
-                        (eg. IpAddrCtrl reformats the address in this way.)
-
-        ._Change()      Called by internal EVT_TEXT handler. Return False to force
-                        skip of the normal class change event.
-        ._Keypress(key) Called by internal EVT_CHAR handler. Return False to force
-                        skip of the normal class keypress event.
-        ._LostFocus()   Called by internal EVT_KILL_FOCUS handler
-
-        ._OnKeyDown(event)
-                        This is the default EVT_KEY_DOWN routine; it just checks for
-                        "navigation keys", and if event.ControlDown(), it fires the
-                        mixin's _OnChar() routine, as such events are not always seen
-                        by the "cooked" EVT_CHAR routine.
-
-        ._OnChar(event) This is the main EVT_CHAR handler for the
-                        MaskedEditMixin.
-
-    The following routines are used to handle standard actions
-    for control keys:
-        _OnArrow(event)         used for arrow navigation events
-        _OnCtrl_A(event)        'select all'
-        _OnCtrl_C(event)        'copy' (uses base control function, as copy is non-destructive)
-        _OnCtrl_S(event)        'save' (does nothing)
-        _OnCtrl_V(event)        'paste' - calls _Paste() method, to do smart paste
-        _OnCtrl_X(event)        'cut'   - calls _Cut() method, to "erase" selection
-        _OnCtrl_Z(event)        'undo'  - resets value to previous value (if any)
-
-        _OnChangeField(event)   primarily used for tab events, but can be
-                                used for other keys (eg. '.' in IpAddrCtrl)
-
-        _OnErase(event)         used for backspace and delete
-        _OnHome(event)
-        _OnEnd(event)
-
-    The following routine provides a hook back to any class derivations, so that
-    they can react to parameter changes before any value is set/reset as a result of
-    those changes.  (eg. masked.ComboBox needs to detect when the choices list is
-    modified, either implicitly or explicitly, so it can reset the base control
-    to have the appropriate choice list *before* the initial value is reset to match.)
-
-        _OnCtrlParametersChanged()
-
-Accessor Functions
-------------------
-    For convenience, each class derived from MaskedEditMixin should
-    define an accessors mixin, so that it exposes only those parameters
-    that make sense for the derivation.  This is done with an intermediate
-    level of inheritance, ie:
-
-    class BaseMaskedTextCtrl( TextCtrl, MaskedEditMixin ):
-
-    class TextCtrl( BaseMaskedTextCtrl, MaskedEditAccessorsMixin ):
-    class ComboBox( BaseMaskedComboBox, MaskedEditAccessorsMixin ):
-    class NumCtrl( BaseMaskedTextCtrl, MaskedNumCtrlAccessorsMixin ):
-    class IpAddrCtrl( BaseMaskedTextCtrl, IpAddrCtrlAccessorsMixin ):
-    class TimeCtrl( BaseMaskedTextCtrl, TimeCtrlAccessorsMixin ):
-
-    etc.
-
-    Each accessors mixin defines Get/Set functions for the base class parameters
-    that are appropriate for that derivation.
-    This allows the base classes to be "more generic," exposing the widest
-    set of options, while not requiring derived classes to be so general.
-"""
-
-import  copy
-import  difflib
-import  re
-import  string
-import  types
-
-import  wx
-
-# jmg 12/9/03 - when we cut ties with Py 2.2 and earlier, this would
-# be a good place to implement the 2.3 logger class
-from wx.tools.dbg import Logger
-
-##dbg = Logger()
-##dbg(enable=1)
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-## Constants for identifying control keys and classes of keys:
-
-WXK_CTRL_A = (ord('A')+1) - ord('A')   ## These keys are not already defined in wx
-WXK_CTRL_C = (ord('C')+1) - ord('A')
-WXK_CTRL_S = (ord('S')+1) - ord('A')
-WXK_CTRL_V = (ord('V')+1) - ord('A')
-WXK_CTRL_X = (ord('X')+1) - ord('A')
-WXK_CTRL_Z = (ord('Z')+1) - ord('A')
-
-nav = (
-    wx.WXK_BACK, wx.WXK_LEFT, wx.WXK_RIGHT, wx.WXK_UP, wx.WXK_DOWN, wx.WXK_TAB,
-    wx.WXK_HOME, wx.WXK_END, wx.WXK_RETURN, wx.WXK_PRIOR, wx.WXK_NEXT,
-    wx.WXK_NUMPAD_LEFT, wx.WXK_NUMPAD_RIGHT, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_DOWN,
-    wx.WXK_NUMPAD_HOME, wx.WXK_NUMPAD_END, wx.WXK_NUMPAD_ENTER, wx.WXK_NUMPAD_PRIOR, wx.WXK_NUMPAD_NEXT
-    )
-
-control = (
-    wx.WXK_BACK, wx.WXK_DELETE, wx.WXK_INSERT,
-    wx.WXK_NUMPAD_DELETE, wx.WXK_NUMPAD_INSERT,
-    WXK_CTRL_A, WXK_CTRL_C, WXK_CTRL_S, WXK_CTRL_V,
-    WXK_CTRL_X, WXK_CTRL_Z
-    )
-
-# Because unicode can go over the ansi character range, we need to explicitly test
-# for all non-visible keystrokes, rather than just assuming a particular range for
-# visible characters:
-wx_control_keycodes = range(32) + list(nav) + list(control) + [
-    wx.WXK_START, wx.WXK_LBUTTON, wx.WXK_RBUTTON, wx.WXK_CANCEL, wx.WXK_MBUTTON,
-    wx.WXK_CLEAR, wx.WXK_SHIFT, wx.WXK_CONTROL, wx.WXK_MENU, wx.WXK_PAUSE, 
-    wx.WXK_CAPITAL, wx.WXK_SELECT, wx.WXK_PRINT, wx.WXK_EXECUTE, wx.WXK_SNAPSHOT,
-    wx.WXK_HELP, wx.WXK_NUMPAD0, wx.WXK_NUMPAD1, wx.WXK_NUMPAD2, wx.WXK_NUMPAD3,
-    wx.WXK_NUMPAD4, wx.WXK_NUMPAD5, wx.WXK_NUMPAD6, wx.WXK_NUMPAD7, wx.WXK_NUMPAD8,
-    wx.WXK_NUMPAD9, wx.WXK_MULTIPLY, wx.WXK_ADD, wx.WXK_SEPARATOR, wx.WXK_SUBTRACT,
-    wx.WXK_DECIMAL, wx.WXK_DIVIDE, wx.WXK_F1, wx.WXK_F2, wx.WXK_F3, wx.WXK_F4, 
-    wx.WXK_F5, wx.WXK_F6, wx.WXK_F7, wx.WXK_F8, wx.WXK_F9, wx.WXK_F10, wx.WXK_F11,
-    wx.WXK_F12, wx.WXK_F13, wx.WXK_F14, wx.WXK_F15, wx.WXK_F16, wx.WXK_F17,
-    wx.WXK_F18, wx.WXK_F19, wx.WXK_F20, wx.WXK_F21, wx.WXK_F22, wx.WXK_F23,
-    wx.WXK_F24, wx.WXK_NUMLOCK, wx.WXK_SCROLL, wx.WXK_PAGEUP, wx.WXK_PAGEDOWN,
-    wx.WXK_NUMPAD_SPACE, wx.WXK_NUMPAD_TAB, wx.WXK_NUMPAD_ENTER, wx.WXK_NUMPAD_F1,
-    wx.WXK_NUMPAD_F2, wx.WXK_NUMPAD_F3, wx.WXK_NUMPAD_F4, wx.WXK_NUMPAD_HOME,
-    wx.WXK_NUMPAD_LEFT, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_RIGHT, wx.WXK_NUMPAD_DOWN,
-    wx.WXK_NUMPAD_PRIOR, wx.WXK_NUMPAD_PAGEUP, wx.WXK_NUMPAD_NEXT, wx.WXK_NUMPAD_PAGEDOWN,
-    wx.WXK_NUMPAD_END, wx.WXK_NUMPAD_BEGIN, wx.WXK_NUMPAD_INSERT, wx.WXK_NUMPAD_DELETE,
-    wx.WXK_NUMPAD_EQUAL, wx.WXK_NUMPAD_MULTIPLY, wx.WXK_NUMPAD_ADD, wx.WXK_NUMPAD_SEPARATOR,
-    wx.WXK_NUMPAD_SUBTRACT, wx.WXK_NUMPAD_DECIMAL, wx.WXK_NUMPAD_DIVIDE, wx.WXK_WINDOWS_LEFT,
-    wx.WXK_WINDOWS_RIGHT, wx.WXK_WINDOWS_MENU, wx.WXK_COMMAND,
-    # Hardware-specific buttons
-    wx.WXK_SPECIAL1, wx.WXK_SPECIAL2, wx.WXK_SPECIAL3, wx.WXK_SPECIAL4, wx.WXK_SPECIAL5,
-    wx.WXK_SPECIAL6, wx.WXK_SPECIAL7, wx.WXK_SPECIAL8, wx.WXK_SPECIAL9, wx.WXK_SPECIAL10,
-    wx.WXK_SPECIAL11, wx.WXK_SPECIAL12, wx.WXK_SPECIAL13, wx.WXK_SPECIAL14, wx.WXK_SPECIAL15,
-    wx.WXK_SPECIAL16, wx.WXK_SPECIAL17, wx.WXK_SPECIAL18, wx.WXK_SPECIAL19, wx.WXK_SPECIAL20
-    ]
-    
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-## Constants for masking. This is where mask characters
-## are defined.
-##  maskchars used to identify valid mask characters from all others
-##   # - allow numeric 0-9 only
-##   A - allow uppercase only. Combine with forceupper to force lowercase to upper
-##   a - allow lowercase only. Combine with forcelower to force upper to lowercase
-##   C - allow any letter, upper or lower
-##   X - allow string.letters, string.punctuation, string.digits
-##   & - allow string.punctuation only (doesn't include all unicode symbols)
-##   * - allow any visible character
-
-## Note: locale settings affect what "uppercase", lowercase, etc comprise.
-## Note: '|' is not a maskchar, in that it is a mask processing directive, and so
-## does not appear here.
-##
-maskchars = ("#","A","a","X","C","N",'*','&')
-ansichars = ""
-for i in xrange(32, 256):
-    ansichars += chr(i)
-
-months = '(01|02|03|04|05|06|07|08|09|10|11|12)'
-charmonths = '(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec)'
-charmonths_dict = {'jan': 1, 'feb': 2, 'mar': 3, 'apr': 4, 'may': 5, 'jun': 6,
-                   'jul': 7, 'aug': 8, 'sep': 9, 'oct': 10, 'nov': 11, 'dec': 12}
-
-days   = '(01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)'
-hours  = '(0\d| \d|1[012])'
-milhours = '(00|01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|16|17|18|19|20|21|22|23)'
-minutes = """(00|01|02|03|04|05|06|07|08|09|10|11|12|13|14|15|\
-16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32|33|34|35|\
-36|37|38|39|40|41|42|43|44|45|46|47|48|49|50|51|52|53|54|55|\
-56|57|58|59)"""
-seconds = minutes
-am_pm_exclude = 'BCDEFGHIJKLMNOQRSTUVWXYZ\x8a\x8c\x8e\x9f\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd8\xd9\xda\xdb\xdc\xdd\xde'
-
-states = "AL,AK,AZ,AR,CA,CO,CT,DE,DC,FL,GA,GU,HI,ID,IL,IN,IA,KS,KY,LA,MA,ME,MD,MI,MN,MS,MO,MT,NE,NV,NH,NJ,NM,NY,NC,ND,OH,OK,OR,PA,PR,RI,SC,SD,TN,TX,UT,VA,VT,VI,WA,WV,WI,WY".split(',')
-
-state_names = ['Alabama','Alaska','Arizona','Arkansas',
-               'California','Colorado','Connecticut',
-               'Delaware','District of Columbia',
-               'Florida','Georgia','Hawaii',
-               'Idaho','Illinois','Indiana','Iowa',
-               'Kansas','Kentucky','Louisiana',
-               'Maine','Maryland','Massachusetts','Michigan',
-               'Minnesota','Mississippi','Missouri','Montana',
-               'Nebraska','Nevada','New Hampshire','New Jersey',
-               'New Mexico','New York','North Carolina','North Dakokta',
-               'Ohio','Oklahoma','Oregon',
-               'Pennsylvania','Puerto Rico','Rhode Island',
-               'South Carolina','South Dakota',
-               'Tennessee','Texas','Utah',
-               'Vermont','Virginia',
-               'Washington','West Virginia',
-               'Wisconsin','Wyoming']
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-## The following dictionary defines the current set of autoformats:
-
-masktags = {
-       "USPHONEFULLEXT": {
-           'mask': "(###) ###-#### x:###",
-           'formatcodes': 'F^->',
-           'validRegex': "^\(\d{3}\) \d{3}-\d{4}",
-           'description': "Phone Number w/opt. ext"
-           },
-       "USPHONETIGHTEXT": {
-           'mask': "###-###-#### x:###",
-           'formatcodes': 'F^->',
-           'validRegex': "^\d{3}-\d{3}-\d{4}",
-           'description': "Phone Number\n (w/hyphens and opt. ext)"
-           },
-       "USPHONEFULL": {
-           'mask': "(###) ###-####",
-           'formatcodes': 'F^->',
-           'validRegex': "^\(\d{3}\) \d{3}-\d{4}",
-           'description': "Phone Number only"
-           },
-       "USPHONETIGHT": {
-           'mask': "###-###-####",
-           'formatcodes': 'F^->',
-           'validRegex': "^\d{3}-\d{3}-\d{4}",
-           'description': "Phone Number\n(w/hyphens)"
-           },
-       "USSTATE": {
-           'mask': "AA",
-           'formatcodes': 'F!V',
-           'validRegex': "([ACDFGHIKLMNOPRSTUVW] |%s)" % string.join(states,'|'),
-           'choices': states,
-           'choiceRequired': True,
-           'description': "US State Code"
-           },
-       "USSTATENAME": {
-           'mask': "ACCCCCCCCCCCCCCCCCCC",
-           'formatcodes': 'F_',
-           'validRegex': "([ACDFGHIKLMNOPRSTUVW] |%s)" % string.join(state_names,'|'),
-           'choices': state_names,
-           'choiceRequired': True,
-           'description': "US State Name"
-           },
-
-       "USDATETIMEMMDDYYYY/HHMMSS": {
-           'mask': "##/##/#### ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + months + '/' + days + '/' + '\d{4} ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "US Date + Time"
-           },
-       "USDATETIMEMMDDYYYY-HHMMSS": {
-           'mask': "##-##-#### ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + months + '-' + days + '-' + '\d{4} ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "US Date + Time\n(w/hypens)"
-           },
-       "USDATE24HRTIMEMMDDYYYY/HHMMSS": {
-           'mask': "##/##/#### ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '/' + days + '/' + '\d{4} ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "US Date + 24Hr (Military) Time"
-           },
-       "USDATE24HRTIMEMMDDYYYY-HHMMSS": {
-           'mask': "##-##-#### ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '-' + days + '-' + '\d{4} ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "US Date + 24Hr Time\n(w/hypens)"
-           },
-       "USDATETIMEMMDDYYYY/HHMM": {
-           'mask': "##/##/#### ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + months + '/' + days + '/' + '\d{4} ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "US Date + Time\n(without seconds)"
-           },
-       "USDATE24HRTIMEMMDDYYYY/HHMM": {
-           'mask': "##/##/#### ##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '/' + days + '/' + '\d{4} ' + milhours + ':' + minutes,
-           'description': "US Date + 24Hr Time\n(without seconds)"
-           },
-       "USDATETIMEMMDDYYYY-HHMM": {
-           'mask': "##-##-#### ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + months + '-' + days + '-' + '\d{4} ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "US Date + Time\n(w/hypens and w/o secs)"
-           },
-       "USDATE24HRTIMEMMDDYYYY-HHMM": {
-           'mask': "##-##-#### ##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '-' + days + '-' + '\d{4} ' + milhours + ':' + minutes,
-           'description': "US Date + 24Hr Time\n(w/hyphens and w/o seconds)"
-           },
-       "USDATEMMDDYYYY/": {
-           'mask': "##/##/####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '/' + days + '/' + '\d{4}',
-           'description': "US Date\n(MMDDYYYY)"
-           },
-       "USDATEMMDDYY/": {
-           'mask': "##/##/##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '/' + days + '/\d\d',
-           'description': "US Date\n(MMDDYY)"
-           },
-       "USDATEMMDDYYYY-": {
-           'mask': "##-##-####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + months + '-' + days + '-' +'\d{4}',
-           'description': "MM-DD-YYYY"
-           },
-
-       "EUDATEYYYYMMDD/": {
-           'mask': "####/##/##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + '\d{4}'+ '/' + months + '/' + days,
-           'description': "YYYY/MM/DD"
-           },
-       "EUDATEYYYYMMDD.": {
-           'mask': "####.##.##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + '\d{4}'+ '.' + months + '.' + days,
-           'description': "YYYY.MM.DD"
-           },
-       "EUDATEDDMMYYYY/": {
-           'mask': "##/##/####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '/' + months + '/' + '\d{4}',
-           'description': "DD/MM/YYYY"
-           },
-       "EUDATEDDMMYYYY.": {
-           'mask': "##.##.####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '.' + months + '.' + '\d{4}',
-           'description': "DD.MM.YYYY"
-           },
-       "EUDATEDDMMMYYYY.": {
-           'mask': "##.CCC.####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '.' + charmonths + '.' + '\d{4}',
-           'description': "DD.Month.YYYY"
-           },
-       "EUDATEDDMMMYYYY/": {
-           'mask': "##/CCC/####",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '/' + charmonths + '/' + '\d{4}',
-           'description': "DD/Month/YYYY"
-           },
-
-       "EUDATETIMEYYYYMMDD/HHMMSS": {
-           'mask': "####/##/## ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + '\d{4}'+ '/' + months + '/' + days + ' ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "YYYY/MM/DD HH:MM:SS"
-           },
-       "EUDATETIMEYYYYMMDD.HHMMSS": {
-           'mask': "####.##.## ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + '\d{4}'+ '.' + months + '.' + days + ' ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "YYYY.MM.DD HH:MM:SS"
-           },
-       "EUDATETIMEDDMMYYYY/HHMMSS": {
-           'mask': "##/##/#### ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + days + '/' + months + '/' + '\d{4} ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "DD/MM/YYYY HH:MM:SS"
-           },
-       "EUDATETIMEDDMMYYYY.HHMMSS": {
-           'mask': "##.##.#### ##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + days + '.' + months + '.' + '\d{4} ' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "DD.MM.YYYY HH:MM:SS"
-           },
-
-       "EUDATETIMEYYYYMMDD/HHMM": {
-           'mask': "####/##/## ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + '\d{4}'+ '/' + months + '/' + days + ' ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "YYYY/MM/DD HH:MM"
-           },
-       "EUDATETIMEYYYYMMDD.HHMM": {
-           'mask': "####.##.## ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + '\d{4}'+ '.' + months + '.' + days + ' ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "YYYY.MM.DD HH:MM"
-           },
-       "EUDATETIMEDDMMYYYY/HHMM": {
-           'mask': "##/##/#### ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + days + '/' + months + '/' + '\d{4} ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "DD/MM/YYYY HH:MM"
-           },
-       "EUDATETIMEDDMMYYYY.HHMM": {
-           'mask': "##.##.#### ##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'DF!',
-           'validRegex': '^' + days + '.' + months + '.' + '\d{4} ' + hours + ':' + minutes + ' (A|P)M',
-           'description': "DD.MM.YYYY HH:MM"
-           },
-
-       "EUDATE24HRTIMEYYYYMMDD/HHMMSS": {
-           'mask': "####/##/## ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + '\d{4}'+ '/' + months + '/' + days + ' ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "YYYY/MM/DD 24Hr Time"
-           },
-       "EUDATE24HRTIMEYYYYMMDD.HHMMSS": {
-           'mask': "####.##.## ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + '\d{4}'+ '.' + months + '.' + days + ' ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "YYYY.MM.DD 24Hr Time"
-           },
-       "EUDATE24HRTIMEDDMMYYYY/HHMMSS": {
-           'mask': "##/##/#### ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '/' + months + '/' + '\d{4} ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "DD/MM/YYYY 24Hr Time"
-           },
-       "EUDATE24HRTIMEDDMMYYYY.HHMMSS": {
-           'mask': "##.##.#### ##:##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '.' + months + '.' + '\d{4} ' + milhours + ':' + minutes + ':' + seconds,
-           'description': "DD.MM.YYYY 24Hr Time"
-           },
-       "EUDATE24HRTIMEYYYYMMDD/HHMM": {
-           'mask': "####/##/## ##:##",
-           'formatcodes': 'DF','validRegex': '^' + '\d{4}'+ '/' + months + '/' + days + ' ' + milhours + ':' + minutes,
-           'description': "YYYY/MM/DD 24Hr Time\n(w/o seconds)"
-           },
-       "EUDATE24HRTIMEYYYYMMDD.HHMM": {
-           'mask': "####.##.## ##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + '\d{4}'+ '.' + months + '.' + days + ' ' + milhours + ':' + minutes,
-           'description': "YYYY.MM.DD 24Hr Time\n(w/o seconds)"
-           },
-       "EUDATE24HRTIMEDDMMYYYY/HHMM": {
-           'mask': "##/##/#### ##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '/' + months + '/' + '\d{4} ' + milhours + ':' + minutes,
-           'description': "DD/MM/YYYY 24Hr Time\n(w/o seconds)"
-           },
-       "EUDATE24HRTIMEDDMMYYYY.HHMM": {
-           'mask': "##.##.#### ##:##",
-           'formatcodes': 'DF',
-           'validRegex': '^' + days + '.' + months + '.' + '\d{4} ' + milhours + ':' + minutes,
-           'description': "DD.MM.YYYY 24Hr Time\n(w/o seconds)"
-           },
-
-       "TIMEHHMMSS": {
-           'mask': "##:##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'TF!',
-           'validRegex': '^' + hours + ':' + minutes + ':' + seconds + ' (A|P)M',
-           'description': "HH:MM:SS (A|P)M\n(see TimeCtrl)"
-           },
-       "TIMEHHMM": {
-           'mask': "##:## AM",
-           'excludeChars': am_pm_exclude,
-           'formatcodes': 'TF!',
-           'validRegex': '^' + hours + ':' + minutes + ' (A|P)M',
-           'description': "HH:MM (A|P)M\n(see TimeCtrl)"
-           },
-       "24HRTIMEHHMMSS": {
-           'mask': "##:##:##",
-           'formatcodes': 'TF',
-           'validRegex': '^' + milhours + ':' + minutes + ':' + seconds,
-           'description': "24Hr HH:MM:SS\n(see TimeCtrl)"
-           },
-       "24HRTIMEHHMM": {
-           'mask': "##:##",
-           'formatcodes': 'TF',
-           'validRegex': '^' + milhours + ':' + minutes,
-           'description': "24Hr HH:MM\n(see TimeCtrl)"
-           },
-       "USSOCIALSEC": {
-           'mask': "###-##-####",
-           'formatcodes': 'F',
-           'validRegex': "\d{3}-\d{2}-\d{4}",
-           'description': "Social Sec#"
-           },
-       "CREDITCARD": {
-           'mask': "####-####-####-####",
-           'formatcodes': 'F',
-           'validRegex': "\d{4}-\d{4}-\d{4}-\d{4}",
-           'description': "Credit Card"
-           },
-       "EXPDATEMMYY": {
-           'mask': "##/##",
-           'formatcodes': "F",
-           'validRegex': "^" + months + "/\d\d",
-           'description': "Expiration MM/YY"
-           },
-       "USZIP": {
-           'mask': "#####",
-           'formatcodes': 'F',
-           'validRegex': "^\d{5}",
-           'description': "US 5-digit zip code"
-           },
-       "USZIPPLUS4": {
-           'mask': "#####-####",
-           'formatcodes': 'F',
-           'validRegex': "\d{5}-(\s{4}|\d{4})",
-           'description': "US zip+4 code"
-           },
-       "PERCENT": {
-           'mask': "0.##",
-           'formatcodes': 'F',
-           'validRegex': "^0.\d\d",
-           'description': "Percentage"
-           },
-       "AGE": {
-           'mask': "###",
-           'formatcodes': "F",
-           'validRegex': "^[1-9]{1}  |[1-9][0-9] |1[0|1|2][0-9]",
-           'description': "Age"
-           },
-       "EMAIL": {
-           'mask': "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
-           'excludeChars': " \\/*&%$#!+='\"",
-           'formatcodes': "F>",
-           'validRegex': "^\w+([\-\.]\w+)*@((([a-zA-Z0-9]+(\-[a-zA-Z0-9]+)*\.)+)[a-zA-Z]{2,4}|\[(\d|\d\d|(1\d\d|2[0-4]\d|25[0-5]))(\.(\d|\d\d|(1\d\d|2[0-4]\d|25[0-5]))){3}\]) *$",
-           'description': "Email address"
-           },
-       "IPADDR": {
-           'mask': "###.###.###.###",
-           'formatcodes': 'F_Sr',
-           'validRegex': "(  \d| \d\d|(1\d\d|2[0-4]\d|25[0-5]))(\.(  \d| \d\d|(1\d\d|2[0-4]\d|25[0-5]))){3}",
-           'description': "IP Address\n(see IpAddrCtrl)"
-           }
-       }
-
-# build demo-friendly dictionary of descriptions of autoformats
-autoformats = []
-for key, value in masktags.items():
-    autoformats.append((key, value['description']))
-autoformats.sort()
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-class Field:
-    """
-    This class manages the individual fields in a masked edit control.
-    Each field has a zero-based index, indicating its position in the
-    control, an extent, an associated mask, and a plethora of optional
-    parameters.  Fields can be instantiated and then associated with
-    parent masked controls, in order to provide field-specific configuration.
-    Alternatively, fields will be implicitly created by the parent control
-    if not provided at construction, at which point, the fields can then
-    manipulated by the controls .SetFieldParameters() method.
-    """
-    valid_params = {
-              'index': None,                    ## which field of mask; set by parent control.
-              'mask': "",                       ## mask chars for this field
-              'extent': (),                     ## (edit start, edit_end) of field; set by parent control.
-              'formatcodes':  "",               ## codes indicating formatting options for the control
-              'fillChar':     ' ',              ## used as initial value for each mask position if initial value is not given
-              'groupChar':    ',',              ## used with numeric fields; indicates what char groups 3-tuple digits
-              'decimalChar':  '.',              ## used with numeric fields; indicates what char separates integer from fraction
-              'shiftDecimalChar': '>',          ## used with numeric fields, indicates what is above the decimal point char on keyboard
-              'useParensForNegatives': False,   ## used with numeric fields, indicates that () should be used vs. - to show negative numbers.
-              'defaultValue': "",               ## use if you want different positional defaults vs. all the same fillChar
-              'excludeChars': "",               ## optional string of chars to exclude even if main mask type does
-              'includeChars': "",               ## optional string of chars to allow even if main mask type doesn't
-              'validRegex':   "",               ## optional regular expression to use to validate the control
-              'validRange':   (),               ## Optional hi-low range for numerics
-              'choices':    [],                 ## Optional list for character expressions
-              'choiceRequired': False,          ## If choices supplied this specifies if valid value must be in the list
-              'compareNoCase': False,           ## Optional flag to indicate whether or not to use case-insensitive list search
-              'autoSelect': False,              ## Set to True to try auto-completion on each keystroke:
-              'validFunc': None,                ## Optional function for defining additional, possibly dynamic validation constraints on contrl
-              'validRequired': False,           ## Set to True to disallow input that results in an invalid value
-              'emptyInvalid':  False,           ## Set to True to make EMPTY = INVALID
-              'description': "",                ## primarily for autoformats, but could be useful elsewhere
-              'raiseOnInvalidPaste': False,     ## if True, paste into field will cause ValueError
-              'stopFieldChangeIfInvalid': False,## if True, disallow field navigation out of invalid field
-              }
-
-    # This list contains all parameters that when set at the control level should
-    # propagate down to each field:
-    propagating_params = ('fillChar', 'groupChar', 'decimalChar','useParensForNegatives',
-                          'compareNoCase', 'emptyInvalid', 'validRequired', 'raiseOnInvalidPaste',
-                          'stopFieldChangeIfInvalid')
-
-    def __init__(self, **kwargs):
-        """
-        This is the "constructor" for setting up parameters for fields.
-        a field_index of -1 is used to indicate "the entire control."
-        """
-####        dbg('Field::Field', indent=1)
-        # Validate legitimate set of parameters:
-        for key in kwargs.keys():
-            if key not in Field.valid_params.keys():
-####                dbg(indent=0)
-                ae = AttributeError('invalid parameter "%s"' % (key))
-                ae.attribute = key
-                raise ae
-
-        # Set defaults for each parameter for this instance, and fully
-        # populate initial parameter list for configuration:
-        for key, value in Field.valid_params.items():
-            setattr(self, '_' + key, copy.copy(value))
-            if not kwargs.has_key(key):
-                kwargs[key] = copy.copy(value)
-
-        self._autoCompleteIndex = -1
-        self._SetParameters(**kwargs)
-        self._ValidateParameters(**kwargs)
-
-####        dbg(indent=0)
-
-
-    def _SetParameters(self, **kwargs):
-        """
-        This function can be used to set individual or multiple parameters for
-        a masked edit field parameter after construction.
-        """
-##        dbg(suspend=1)
-##        dbg('maskededit.Field::_SetParameters', indent=1)
-        # Validate keyword arguments:
-        for key in kwargs.keys():
-            if key not in Field.valid_params.keys():
-##                dbg(indent=0, suspend=0)
-                ae = AttributeError('invalid keyword argument "%s"' % key)
-                ae.attribute = key
-                raise ae
-
-##        if self._index is not None: dbg('field index:', self._index)
-##        dbg('parameters:', indent=1)
-        for key, value in kwargs.items():
-##            dbg('%s:' % key, value)
-            pass
-##        dbg(indent=0)
-
-
-        old_fillChar = self._fillChar   # store so we can change choice lists accordingly if it changes
-
-        # First, Assign all parameters specified:
-        for key in Field.valid_params.keys():
-            if kwargs.has_key(key):
-                setattr(self, '_' + key, kwargs[key] )
-
-        if kwargs.has_key('formatcodes'):   # (set/changed)
-            self._forceupper  = '!' in self._formatcodes
-            self._forcelower  = '^' in self._formatcodes
-            self._groupdigits = ',' in self._formatcodes
-            self._okSpaces    = '_' in self._formatcodes
-            self._padZero     = '0' in self._formatcodes
-            self._autofit     = 'F' in self._formatcodes
-            self._insertRight = 'r' in self._formatcodes
-            self._allowInsert = '>' in self._formatcodes
-            self._alignRight  = 'R' in self._formatcodes or 'r' in self._formatcodes
-            self._moveOnFieldFull = not '<' in self._formatcodes
-            self._selectOnFieldEntry = 'S' in self._formatcodes
-
-            if kwargs.has_key('groupChar'):
-                self._groupChar = kwargs['groupChar']
-            if kwargs.has_key('decimalChar'):
-                self._decimalChar = kwargs['decimalChar']
-            if kwargs.has_key('shiftDecimalChar'):
-                self._shiftDecimalChar = kwargs['shiftDecimalChar']
-
-        if kwargs.has_key('formatcodes') or kwargs.has_key('validRegex'):
-            self._regexMask   = 'V' in self._formatcodes and self._validRegex
-
-        if kwargs.has_key('fillChar'):
-            self._old_fillChar = old_fillChar
-####            dbg("self._old_fillChar: '%s'" % self._old_fillChar)
-
-        if kwargs.has_key('mask') or kwargs.has_key('validRegex'):  # (set/changed)
-            self._isInt = _isInteger(self._mask)
-##            dbg('isInt?', self._isInt, 'self._mask:"%s"' % self._mask)
-
-##        dbg(indent=0, suspend=0)
-
-
-    def _ValidateParameters(self, **kwargs):
-        """
-        This function can be used to validate individual or multiple parameters for
-        a masked edit field parameter after construction.
-        """
-##        dbg(suspend=1)
-##        dbg('maskededit.Field::_ValidateParameters', indent=1)
-##        if self._index is not None: dbg('field index:', self._index)
-####        dbg('parameters:', indent=1)
-##        for key, value in kwargs.items():
-####            dbg('%s:' % key, value)
-####        dbg(indent=0)
-####        dbg("self._old_fillChar: '%s'" % self._old_fillChar)
-
-        # Verify proper numeric format params:
-        if self._groupdigits and self._groupChar == self._decimalChar:
-##            dbg(indent=0, suspend=0)
-            ae = AttributeError("groupChar '%s' cannot be the same as decimalChar '%s'" % (self._groupChar, self._decimalChar))
-            ae.attribute = self._groupChar
-            raise ae
-
-
-        # Now go do validation, semantic and inter-dependency parameter processing:
-        if kwargs.has_key('choices') or kwargs.has_key('compareNoCase') or kwargs.has_key('choiceRequired'): # (set/changed)
-
-            self._compareChoices = [choice.strip() for choice in self._choices]
-
-            if self._compareNoCase and self._choices:
-                self._compareChoices = [item.lower() for item in self._compareChoices]
-
-            if kwargs.has_key('choices'):
-                self._autoCompleteIndex = -1
-
-
-        if kwargs.has_key('validRegex'):    # (set/changed)
-            if self._validRegex:
-                try:
-                    if self._compareNoCase:
-                        self._filter = re.compile(self._validRegex, re.IGNORECASE)
-                    else:
-                        self._filter = re.compile(self._validRegex)
-                except:
-##                    dbg(indent=0, suspend=0)
-                    raise TypeError('%s: validRegex "%s" not a legal regular expression' % (str(self._index), self._validRegex))
-            else:
-                self._filter = None
-
-        if kwargs.has_key('validRange'):    # (set/changed)
-            self._hasRange  = False
-            self._rangeHigh = 0
-            self._rangeLow  = 0
-            if self._validRange:
-                if type(self._validRange) != types.TupleType or len( self._validRange )!= 2 or self._validRange[0] > self._validRange[1]:
-##                    dbg(indent=0, suspend=0)
-                    raise TypeError('%s: validRange %s parameter must be tuple of form (a,b) where a <= b'
-                                    % (str(self._index), repr(self._validRange)) )
-
-                self._hasRange  = True
-                self._rangeLow  = self._validRange[0]
-                self._rangeHigh = self._validRange[1]
-
-        if kwargs.has_key('choices') or (len(self._choices) and len(self._choices[0]) != len(self._mask)):       # (set/changed)
-            self._hasList   = False
-            if self._choices and type(self._choices) not in (types.TupleType, types.ListType):
-##                dbg(indent=0, suspend=0)
-                raise TypeError('%s: choices must be a sequence of strings' % str(self._index))
-            elif len( self._choices) > 0:
-                for choice in self._choices:
-                    if type(choice) not in (types.StringType, types.UnicodeType):
-##                        dbg(indent=0, suspend=0)
-                        raise TypeError('%s: choices must be a sequence of strings' % str(self._index))
-
-                length = len(self._mask)
-##                dbg('len(%s)' % self._mask, length, 'len(self._choices):', len(self._choices), 'length:', length, 'self._alignRight?', self._alignRight)
-                if len(self._choices) and length:
-                    if len(self._choices[0]) > length:
-                        # changed mask without respecifying choices; readjust the width as appropriate:
-                        self._choices = [choice.strip() for choice in self._choices]
-                    if self._alignRight:
-                        self._choices = [choice.rjust( length ) for choice in self._choices]
-                    else:
-                        self._choices = [choice.ljust( length ) for choice in self._choices]
-##                    dbg('aligned choices:', self._choices)
-
-                if hasattr(self, '_template'):
-                    # Verify each choice specified is valid:
-                    for choice in self._choices:
-                        if self.IsEmpty(choice) and not self._validRequired:
-                            # allow empty values even if invalid, (just colored differently)
-                            continue
-                        if not self.IsValid(choice):
-##                            dbg(indent=0, suspend=0)
-                            ve = ValueError('%s: "%s" is not a valid value for the control as specified.' % (str(self._index), choice))
-                            ve.value = choice
-                            raise ve
-                self._hasList = True
-
-####        dbg("kwargs.has_key('fillChar')?", kwargs.has_key('fillChar'), "len(self._choices) > 0?", len(self._choices) > 0)
-####        dbg("self._old_fillChar:'%s'" % self._old_fillChar, "self._fillChar: '%s'" % self._fillChar)
-        if kwargs.has_key('fillChar') and len(self._choices) > 0:
-            if kwargs['fillChar'] != ' ':
-                self._choices = [choice.replace(' ', self._fillChar) for choice in self._choices]
-            else:
-                self._choices = [choice.replace(self._old_fillChar, self._fillChar) for choice in self._choices]
-##            dbg('updated choices:', self._choices)
-
-
-        if kwargs.has_key('autoSelect') and kwargs['autoSelect']:
-            if not self._hasList:
-##                dbg('no list to auto complete; ignoring "autoSelect=True"')
-                self._autoSelect = False
-
-        # reset field validity assumption:
-        self._valid = True
-##        dbg(indent=0, suspend=0)
-
-
-    def _GetParameter(self, paramname):
-        """
-        Routine for retrieving the value of any given parameter
-        """
-        if Field.valid_params.has_key(paramname):
-            return getattr(self, '_' + paramname)
-        else:
-            TypeError('Field._GetParameter: invalid parameter "%s"' % key)
-
-
-    def IsEmpty(self, slice):
-        """
-        Indicates whether the specified slice is considered empty for the
-        field.
-        """
-##        dbg('Field::IsEmpty("%s")' % slice, indent=1)
-        if not hasattr(self, '_template'):
-##            dbg(indent=0)
-            raise AttributeError('_template')
-
-##        dbg('self._template: "%s"' % self._template)
-##        dbg('self._defaultValue: "%s"' % str(self._defaultValue))
-        if slice == self._template and not self._defaultValue:
-##            dbg(indent=0)
-            return True
-
-        elif slice == self._template:
-            empty = True
-            for pos in range(len(self._template)):
-####                dbg('slice[%(pos)d] != self._fillChar?' %locals(), slice[pos] != self._fillChar[pos])
-                if slice[pos] not in (' ', self._fillChar):
-                    empty = False
-                    break
-##            dbg("IsEmpty? %(empty)d (do all mask chars == fillChar?)" % locals(), indent=0)
-            return empty
-        else:
-##            dbg("IsEmpty? 0 (slice doesn't match template)", indent=0)
-            return False
-
-
-    def IsValid(self, slice):
-        """
-        Indicates whether the specified slice is considered a valid value for the
-        field.
-        """
-##        dbg(suspend=1)
-##        dbg('Field[%s]::IsValid("%s")' % (str(self._index), slice), indent=1)
-        valid = True    # assume true to start
-
-        if self.IsEmpty(slice):
-##            dbg(indent=0, suspend=0)
-            if self._emptyInvalid:
-                return False
-            else:
-                return True
-
-        elif self._hasList and self._choiceRequired:
-##            dbg("(member of list required)")
-            # do case-insensitive match on list; strip surrounding whitespace from slice (already done for choices):
-            if self._fillChar != ' ':
-                slice = slice.replace(self._fillChar, ' ')
-##                dbg('updated slice:"%s"' % slice)
-            compareStr = slice.strip()
-
-            if self._compareNoCase:
-                compareStr = compareStr.lower()
-            valid = compareStr in self._compareChoices
-
-        elif self._hasRange and not self.IsEmpty(slice):
-##            dbg('validating against range')
-            try:
-                # allow float as well as int ranges (int comparisons for free.)
-                valid = self._rangeLow <= float(slice) <= self._rangeHigh
-            except:
-                valid = False
-
-        elif self._validRegex and self._filter:
-##            dbg('validating against regex')
-            valid = (re.match( self._filter, slice) is not None)
-
-        if valid and self._validFunc:
-##            dbg('validating against supplied function')
-            valid = self._validFunc(slice)
-##        dbg('valid?', valid, indent=0, suspend=0)
-        return valid
-
-
-    def _AdjustField(self, slice):
-        """ 'Fixes' an integer field. Right or left-justifies, as required."""
-##        dbg('Field::_AdjustField("%s")' % slice, indent=1)
-        length = len(self._mask)
-####        dbg('length(self._mask):', length)
-####        dbg('self._useParensForNegatives?', self._useParensForNegatives)
-        if self._isInt:
-            if self._useParensForNegatives:
-                signpos = slice.find('(')
-                right_signpos = slice.find(')')
-                intStr = slice.replace('(', '').replace(')', '')    # drop sign, if any
-            else:
-                signpos = slice.find('-')
-                intStr = slice.replace( '-', '' )                   # drop sign, if any
-                right_signpos = -1
-
-            intStr = intStr.replace(' ', '')                        # drop extra spaces
-            intStr = string.replace(intStr,self._fillChar,"")       # drop extra fillchars
-            intStr = string.replace(intStr,"-","")                  # drop sign, if any
-            intStr = string.replace(intStr, self._groupChar, "")    # lose commas/dots
-####            dbg('intStr:"%s"' % intStr)
-            start, end = self._extent
-            field_len = end - start
-            if not self._padZero and len(intStr) != field_len and intStr.strip():
-                intStr = str(long(intStr))
-####            dbg('raw int str: "%s"' % intStr)
-####            dbg('self._groupdigits:', self._groupdigits, 'self._formatcodes:', self._formatcodes)
-            if self._groupdigits:
-                new = ''
-                cnt = 1
-                for i in range(len(intStr)-1, -1, -1):
-                    new = intStr[i] + new
-                    if (cnt) % 3 == 0:
-                        new = self._groupChar + new
-                    cnt += 1
-                if new and new[0] == self._groupChar:
-                    new = new[1:]
-                if len(new) <= length:
-                    # expanded string will still fit and leave room for sign:
-                    intStr = new
-                # else... leave it without the commas...
-
-##            dbg('padzero?', self._padZero)
-##            dbg('len(intStr):', len(intStr), 'field length:', length)
-            if self._padZero and len(intStr) < length:
-                intStr = '0' * (length - len(intStr)) + intStr
-                if signpos != -1:   # we had a sign before; restore it
-                    if self._useParensForNegatives:
-                        intStr = '(' + intStr[1:]
-                        if right_signpos != -1:
-                            intStr += ')'
-                    else:
-                        intStr = '-' + intStr[1:]
-            elif signpos != -1 and slice[0:signpos].strip() == '':    # - was before digits
-                if self._useParensForNegatives:
-                    intStr = '(' + intStr
-                    if right_signpos != -1:
-                        intStr += ')'
-                else:
-                    intStr = '-' + intStr
-            elif right_signpos != -1:
-                # must have had ')' but '(' was before field; re-add ')'
-                intStr += ')'
-            slice = intStr
-
-        slice = slice.strip() # drop extra spaces
-
-        if self._alignRight:     ## Only if right-alignment is enabled
-            slice = slice.rjust( length )
-        else:
-            slice = slice.ljust( length )
-        if self._fillChar != ' ':
-            slice = slice.replace(' ', self._fillChar)
-##        dbg('adjusted slice: "%s"' % slice, indent=0)
-        return slice
-
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-class MaskedEditMixin:
-    """
-    This class allows us to abstract the masked edit functionality that could
-    be associated with any text entry control. (eg. wx.TextCtrl, wx.ComboBox, etc.)
-    It forms the basis for all of the lib.masked controls.
-    """
-    valid_ctrl_params = {
-              'mask': 'XXXXXXXXXXXXX',          ## mask string for formatting this control
-              'autoformat':   "",               ## optional auto-format code to set format from masktags dictionary
-              'fields': {},                     ## optional list/dictionary of maskededit.Field class instances, indexed by position in mask
-              'datestyle':    'MDY',            ## optional date style for date-type values. Can trigger autocomplete year
-              'autoCompleteKeycodes': [],       ## Optional list of additional keycodes which will invoke field-auto-complete
-              'useFixedWidthFont': True,        ## Use fixed-width font instead of default for base control
-              'defaultEncoding': 'latin1',      ## optional argument to indicate unicode codec to use (unicode ctrls only)
-              'retainFieldValidation': False,   ## Set this to true if setting control-level parameters independently,
-                                                ## from field validation constraints
-              'emptyBackgroundColour': "White",
-              'validBackgroundColour': "White",
-              'invalidBackgroundColour': "Yellow",
-              'foregroundColour': "Black",
-              'signedForegroundColour': "Red",
-              'demo': False}
-
-
-    def __init__(self, name = 'MaskedEdit', **kwargs):
-        """
-        This is the "constructor" for setting up the mixin variable parameters for the composite class.
-        """
-
-        self.name = name
-
-        # set up flag for doing optional things to base control if possible
-        if not hasattr(self, 'controlInitialized'):
-            self.controlInitialized = False
-
-        # Set internal state var for keeping track of whether or not a character
-        # action results in a modification of the control, since .SetValue()
-        # doesn't modify the base control's internal state:
-        self.modified = False
-        self._previous_mask = None
-
-        # Validate legitimate set of parameters:
-        for key in kwargs.keys():
-            if key.replace('Color', 'Colour') not in MaskedEditMixin.valid_ctrl_params.keys() + Field.valid_params.keys():
-                raise TypeError('%s: invalid parameter "%s"' % (name, key))
-
-        ## Set up dictionary that can be used by subclasses to override or add to default
-        ## behavior for individual characters.  Derived subclasses needing to change
-        ## default behavior for keys can either redefine the default functions for the
-        ## common keys or add functions for specific keys to this list.  Each function
-        ## added should take the key event as argument, and return False if the key
-        ## requires no further processing.
-        ##
-        ## Initially populated with navigation and function control keys:
-        self._keyhandlers = {
-            # default navigation keys and handlers:
-            wx.WXK_BACK:            self._OnErase,
-            wx.WXK_LEFT:            self._OnArrow,
-            wx.WXK_NUMPAD_LEFT:     self._OnArrow,
-            wx.WXK_RIGHT:           self._OnArrow,
-            wx.WXK_NUMPAD_RIGHT:    self._OnArrow,
-            wx.WXK_UP:              self._OnAutoCompleteField,
-            wx.WXK_NUMPAD_UP:       self._OnAutoCompleteField,
-            wx.WXK_DOWN:            self._OnAutoCompleteField,
-            wx.WXK_NUMPAD_DOWN:     self._OnAutoCompleteField,
-            wx.WXK_TAB:             self._OnChangeField,
-            wx.WXK_HOME:            self._OnHome,
-            wx.WXK_NUMPAD_HOME:     self._OnHome,
-            wx.WXK_END:             self._OnEnd,
-            wx.WXK_NUMPAD_END:      self._OnEnd,
-            wx.WXK_RETURN:          self._OnReturn,
-            wx.WXK_NUMPAD_ENTER:    self._OnReturn,
-            wx.WXK_PRIOR:           self._OnAutoCompleteField,
-            wx.WXK_NUMPAD_PRIOR:    self._OnAutoCompleteField,
-            wx.WXK_NEXT:            self._OnAutoCompleteField,
-            wx.WXK_NUMPAD_NEXT:     self._OnAutoCompleteField,
-
-            # default function control keys and handlers:
-            wx.WXK_DELETE:          self._OnDelete,
-            wx.WXK_NUMPAD_DELETE:   self._OnDelete,
-            wx.WXK_INSERT:          self._OnInsert,
-            wx.WXK_NUMPAD_INSERT:   self._OnInsert,
-            
-            WXK_CTRL_A:             self._OnCtrl_A,
-            WXK_CTRL_C:             self._OnCtrl_C,
-            WXK_CTRL_S:             self._OnCtrl_S,
-            WXK_CTRL_V:             self._OnCtrl_V,
-            WXK_CTRL_X:             self._OnCtrl_X,
-            WXK_CTRL_Z:             self._OnCtrl_Z,
-            }
-
-        ## bind standard navigational and control keycodes to this instance,
-        ## so that they can be augmented and/or changed in derived classes:
-        self._nav = list(nav)
-        self._control = list(control)
-
-        ## Dynamically evaluate and store string constants for mask chars
-        ## so that locale settings can be made after this module is imported
-        ## and the controls created after that is done can allow the
-        ## appropriate characters:
-        self.maskchardict  = {
-            '#': string.digits,
-            'A': string.uppercase,
-            'a': string.lowercase,
-            'X': string.letters + string.punctuation + string.digits,
-            'C': string.letters,
-            'N': string.letters + string.digits,
-            '&': string.punctuation,
-            '*': ansichars  # to give it a value, but now allows any non-wxcontrol character
-        }
-
-        ## self._ignoreChange is used by MaskedComboBox, because
-        ## of the hack necessary to determine the selection; it causes
-        ## EVT_TEXT messages from the combobox to be ignored if set.
-        self._ignoreChange = False
-
-        # These are used to keep track of previous value, for undo functionality:
-        self._curValue  = None
-        self._prevValue = None
-
-        self._valid     = True
-
-        # Set defaults for each parameter for this instance, and fully
-        # populate initial parameter list for configuration:
-        for key, value in MaskedEditMixin.valid_ctrl_params.items():
-            setattr(self, '_' + key, copy.copy(value))
-            if not kwargs.has_key(key):
-####                dbg('%s: "%s"' % (key, repr(value)))
-                kwargs[key] = copy.copy(value)
-
-        # Create a "field" that holds global parameters for control constraints
-        self._ctrl_constraints = self._fields[-1] = Field(index=-1)
-        self.SetCtrlParameters(**kwargs)
-
-
-
-    def SetCtrlParameters(self, **kwargs):
-        """
-        This public function can be used to set individual or multiple masked edit
-        parameters after construction.  (See maskededit module overview for the list
-        of valid parameters.)
-        """
-##        dbg(suspend=1)
-##        dbg('MaskedEditMixin::SetCtrlParameters', indent=1)
-####        dbg('kwargs:', indent=1)
-##        for key, value in kwargs.items():
-####            dbg(key, '=', value)
-####        dbg(indent=0)
-
-        # Validate keyword arguments:
-        constraint_kwargs = {}
-        ctrl_kwargs = {}
-        for key, value in kwargs.items():
-            key = key.replace('Color', 'Colour')    # for b-c, and standard wxPython spelling
-            if key not in MaskedEditMixin.valid_ctrl_params.keys() + Field.valid_params.keys():
-##                dbg(indent=0, suspend=0)
-                ae = AttributeError('Invalid keyword argument "%s" for control "%s"' % (key, self.name))
-                ae.attribute = key
-                raise ae
-            elif key in Field.valid_params.keys():
-                constraint_kwargs[key] = value
-            else:
-                ctrl_kwargs[key] = value
-
-        mask = None
-        reset_args = {}
-
-        if ctrl_kwargs.has_key('autoformat'):
-            autoformat = ctrl_kwargs['autoformat']
-        else:
-            autoformat = None
-
-        # handle "parochial name" backward compatibility:
-        if autoformat and autoformat.find('MILTIME') != -1 and autoformat not in masktags.keys():
-            autoformat = autoformat.replace('MILTIME', '24HRTIME')
-
-        if autoformat != self._autoformat and autoformat in masktags.keys():
-##            dbg('autoformat:', autoformat)
-            self._autoformat                  = autoformat
-            mask                              = masktags[self._autoformat]['mask']
-            # gather rest of any autoformat parameters:
-            for param, value in masktags[self._autoformat].items():
-                if param == 'mask': continue    # (must be present; already accounted for)
-                constraint_kwargs[param] = value
-
-        elif autoformat and not autoformat in masktags.keys():
-            ae = AttributeError('invalid value for autoformat parameter: %s' % repr(autoformat))
-            ae.attribute = autoformat
-            raise ae
-        else:
-##            dbg('autoformat not selected')
-            if kwargs.has_key('mask'):
-                mask = kwargs['mask']
-##                dbg('mask:', mask)
-
-        ## Assign style flags
-        if mask is None:
-##            dbg('preserving previous mask')
-            mask = self._previous_mask   # preserve previous mask
-        else:
-##            dbg('mask (re)set')
-            reset_args['reset_mask'] = mask
-            constraint_kwargs['mask'] = mask
-
-            # wipe out previous fields; preserve new control-level constraints
-            self._fields = {-1: self._ctrl_constraints}
-
-
-        if ctrl_kwargs.has_key('fields'):
-            # do field parameter type validation, and conversion to internal dictionary
-            # as appropriate:
-            fields = ctrl_kwargs['fields']
-            if type(fields) in (types.ListType, types.TupleType):
-                for i in range(len(fields)):
-                    field = fields[i]
-                    if not isinstance(field, Field):
-##                        dbg(indent=0, suspend=0)
-                        raise TypeError('invalid type for field parameter: %s' % repr(field))
-                    self._fields[i] = field
-
-            elif type(fields) == types.DictionaryType:
-                for index, field in fields.items():
-                    if not isinstance(field, Field):
-##                        dbg(indent=0, suspend=0)
-                        raise TypeError('invalid type for field parameter: %s' % repr(field))
-                    self._fields[index] = field
-            else:
-##                dbg(indent=0, suspend=0)
-                raise TypeError('fields parameter must be a list or dictionary; not %s' % repr(fields))
-
-        # Assign constraint parameters for entire control:
-####        dbg('control constraints:', indent=1)
-##        for key, value in constraint_kwargs.items():
-####            dbg('%s:' % key, value)
-####        dbg(indent=0)
-
-        # determine if changing parameters that should affect the entire control:
-        for key in MaskedEditMixin.valid_ctrl_params.keys():
-            if key in ( 'mask', 'fields' ): continue    # (processed separately)
-            if ctrl_kwargs.has_key(key):
-                setattr(self, '_' + key, ctrl_kwargs[key])
-
-        # Validate color parameters, converting strings to named colors and validating
-        # result if appropriate:
-        for key in ('emptyBackgroundColour', 'invalidBackgroundColour', 'validBackgroundColour',
-                    'foregroundColour', 'signedForegroundColour'):
-            if ctrl_kwargs.has_key(key):
-                if type(ctrl_kwargs[key]) in (types.StringType, types.UnicodeType):
-                    c = wx.NamedColour(ctrl_kwargs[key])
-                    if c.Get() == (-1, -1, -1):
-                        raise TypeError('%s not a legal color specification for %s' % (repr(ctrl_kwargs[key]), key))
-                    else:
-                        # replace attribute with wxColour object:
-                        setattr(self, '_' + key, c)
-                        # attach a python dynamic attribute to wxColour for debug printouts
-                        c._name = ctrl_kwargs[key]
-
-                elif type(ctrl_kwargs[key]) != type(wx.BLACK):
-                    raise TypeError('%s not a legal color specification for %s' % (repr(ctrl_kwargs[key]), key))
-
-
-##        dbg('self._retainFieldValidation:', self._retainFieldValidation)
-        if not self._retainFieldValidation:
-            # Build dictionary of any changing parameters which should be propagated to the
-            # component fields:
-            for arg in Field.propagating_params:
-####                dbg('kwargs.has_key(%s)?' % arg, kwargs.has_key(arg))
-####                dbg('getattr(self._ctrl_constraints, _%s)?' % arg, getattr(self._ctrl_constraints, '_'+arg))
-                reset_args[arg] = kwargs.has_key(arg) and kwargs[arg] != getattr(self._ctrl_constraints, '_'+arg)
-####                dbg('reset_args[%s]?' % arg, reset_args[arg])
-
-        # Set the control-level constraints:
-        self._ctrl_constraints._SetParameters(**constraint_kwargs)
-
-        # This routine does the bulk of the interdependent parameter processing, determining
-        # the field extents of the mask if changed, resetting parameters as appropriate,
-        # determining the overall template value for the control, etc.
-        self._configure(mask, **reset_args)
-
-        # now that we've propagated the field constraints and mask portions to the
-        # various fields, validate the constraints
-        self._ctrl_constraints._ValidateParameters(**constraint_kwargs)
-
-        # Validate that all choices for given fields are at least of the
-        # necessary length, and that they all would be valid pastes if pasted
-        # into their respective fields:
-####        dbg('validating choices')
-        self._validateChoices()
-
-
-        self._autofit = self._ctrl_constraints._autofit
-        self._isNeg      = False
-
-        self._isDate     = 'D' in self._ctrl_constraints._formatcodes and _isDateType(mask)
-        self._isTime     = 'T' in self._ctrl_constraints._formatcodes and _isTimeType(mask)
-        if self._isDate:
-            # Set _dateExtent, used in date validation to locate date in string;
-            # always set as though year will be 4 digits, even if mask only has
-            # 2 digits, so we can always properly process the intended year for
-            # date validation (leap years, etc.)
-            if self._mask.find('CCC') != -1: self._dateExtent = 11
-            else:                            self._dateExtent = 10
-
-            self._4digityear = len(self._mask) > 8 and self._mask[9] == '#'
-
-        if self._isDate and self._autoformat:
-            # Auto-decide datestyle:
-            if self._autoformat.find('MDDY')    != -1: self._datestyle = 'MDY'
-            elif self._autoformat.find('YMMD')  != -1: self._datestyle = 'YMD'
-            elif self._autoformat.find('YMMMD') != -1: self._datestyle = 'YMD'
-            elif self._autoformat.find('DMMY')  != -1: self._datestyle = 'DMY'
-            elif self._autoformat.find('DMMMY') != -1: self._datestyle = 'DMY'
-
-        # Give derived controls a chance to react to parameter changes before
-        # potentially changing current value of the control.
-        self._OnCtrlParametersChanged()
-
-        if self.controlInitialized:
-            # Then the base control is available for configuration;
-            # take action on base control based on new settings, as appropriate.
-            if kwargs.has_key('useFixedWidthFont'):
-                # Set control font - fixed width by default
-                self._setFont()
-
-            if reset_args.has_key('reset_mask'):
-##                dbg('reset mask')
-                curvalue = self._GetValue()
-                if curvalue.strip():
-                    try:
-##                        dbg('attempting to _SetInitialValue(%s)' % self._GetValue())
-                        self._SetInitialValue(self._GetValue())
-                    except Exception, e:
-##                        dbg('exception caught:', e)
-##                        dbg("current value doesn't work; attempting to reset to template")
-                        self._SetInitialValue()
-                else:
-##                    dbg('attempting to _SetInitialValue() with template')
-                    self._SetInitialValue()
-
-            elif kwargs.has_key('useParensForNegatives'):
-                newvalue = self._getSignedValue()[0]
-
-                if newvalue is not None:
-                    # Adjust for new mask:
-                    if len(newvalue) < len(self._mask):
-                        newvalue += ' '
-                    elif len(newvalue) > len(self._mask):
-                        if newvalue[-1] in (' ', ')'):
-                            newvalue = newvalue[:-1]
-
-##                    dbg('reconfiguring value for parens:"%s"' % newvalue)
-                    self._SetValue(newvalue)
-
-                    if self._prevValue != newvalue:
-                        self._prevValue = newvalue  # disallow undo of sign type
-
-            if self._autofit:
-##                dbg('calculated size:', self._CalcSize())
-                self.SetClientSize(self._CalcSize())
-                width = self.GetSize().width
-                height = self.GetBestSize().height
-##                dbg('setting client size to:', (width, height))
-                self.SetInitialSize((width, height))
-
-            # Set value/type-specific formatting
-            self._applyFormatting()
-##        dbg(indent=0, suspend=0)
-
-    def SetMaskParameters(self, **kwargs):
-        """ old name for the SetCtrlParameters function  (DEPRECATED)"""
-        return self.SetCtrlParameters(**kwargs)
-
-
-    def GetCtrlParameter(self, paramname):
-        """
-        Routine for retrieving the value of any given parameter
-        """
-        if MaskedEditMixin.valid_ctrl_params.has_key(paramname.replace('Color','Colour')):
-            return getattr(self, '_' + paramname.replace('Color', 'Colour'))
-        elif Field.valid_params.has_key(paramname):
-            return self._ctrl_constraints._GetParameter(paramname)
-        else:
-            TypeError('"%s".GetCtrlParameter: invalid parameter "%s"' % (self.name, paramname))
-
-    def GetMaskParameter(self, paramname):
-        """ old name for the GetCtrlParameters function  (DEPRECATED)"""
-        return self.GetCtrlParameter(paramname)
-
-
-## This idea worked, but Boa was unable to use this solution...
-##    def _attachMethod(self, func):
-##        import new
-##        setattr(self, func.__name__, new.instancemethod(func, self, self.__class__))
-##
-##
-##    def _DefinePropertyFunctions(exposed_params):
-##        for param in exposed_params:
-##            propname = param[0].upper() + param[1:]
-##
-##            exec('def Set%s(self, value): self.SetCtrlParameters(%s=value)' % (propname, param))
-##            exec('def Get%s(self): return self.GetCtrlParameter("%s")''' % (propname, param))
-##            self._attachMethod(locals()['Set%s' % propname])
-##            self._attachMethod(locals()['Get%s' % propname])
-##
-##            if param.find('Colour') != -1:
-##                # add non-british spellings, for backward-compatibility
-##                propname.replace('Colour', 'Color')
-##
-##                exec('def Set%s(self, value): self.SetCtrlParameters(%s=value)' % (propname, param))
-##                exec('def Get%s(self): return self.GetCtrlParameter("%s")''' % (propname, param))
-##                self._attachMethod(locals()['Set%s' % propname])
-##                self._attachMethod(locals()['Get%s' % propname])
-##
-
-
-    def SetFieldParameters(self, field_index, **kwargs):
-        """
-        Routine provided to modify the parameters of a given field.
-        Because changes to fields can affect the overall control,
-        direct access to the fields is prevented, and the control
-        is always "reconfigured" after setting a field parameter.
-        (See maskededit module overview for the list of valid field-level
-        parameters.)
-        """
-        if field_index not in self._field_indices:
-            ie = IndexError('%s is not a valid field for control "%s".' % (str(field_index), self.name))
-            ie.index = field_index
-            raise ie
-        # set parameters as requested:
-        self._fields[field_index]._SetParameters(**kwargs)
-
-        # Possibly reprogram control template due to resulting changes, and ensure
-        # control-level params are still propagated to fields:
-        self._configure(self._previous_mask)
-        self._fields[field_index]._ValidateParameters(**kwargs)
-
-        if self.controlInitialized:
-            if kwargs.has_key('fillChar') or kwargs.has_key('defaultValue'):
-                self._SetInitialValue()
-
-                if self._autofit:
-                    # this is tricky, because, as Robin explains:
-                    # "Basically there are two sizes to deal with, that are potentially 
-                    #  different.  The client size is the inside size and may, depending
-                    #  on platform, exclude the borders and such.  The normal size is
-                    #  the outside size that does include the borders.  What you are
-                    #  calculating (in _CalcSize) is the client size, but the sizers
-                    #  deal with the full size and so that is the minimum size that
-                    #  we need to set with SetInitialSize.  The root of the problem is
-                    #  that in _calcSize the current client size height is returned,
-                    #  instead of a height based on the current font.  So I suggest using
-                    #  _calcSize to just get the width, and then use GetBestSize to
-                    #  get the height."
-                    self.SetClientSize(self._CalcSize())
-                    width = self.GetSize().width
-                    height = self.GetBestSize().height
-                    self.SetInitialSize((width, height))
-
-
-            # Set value/type-specific formatting
-            self._applyFormatting()
-
-
-    def GetFieldParameter(self, field_index, paramname):
-        """
-        Routine provided for getting a parameter of an individual field.
-        """
-        if field_index not in self._field_indices:
-            ie = IndexError('%s is not a valid field for control "%s".' % (str(field_index), self.name))
-            ie.index = field_index
-            raise ie
-        elif Field.valid_params.has_key(paramname):
-            return self._fields[field_index]._GetParameter(paramname)
-        else:
-            ae = AttributeError('"%s".GetFieldParameter: invalid parameter "%s"' % (self.name, paramname))
-            ae.attribute = paramname
-            raise ae
-
-
-    def _SetKeycodeHandler(self, keycode, func):
-        """
-        This function adds and/or replaces key event handling functions
-        used by the control.  <func> should take the event as argument
-        and return False if no further action on the key is necessary.
-        """
-        if func:
-            self._keyhandlers[keycode] = func
-        elif self._keyhandlers.has_key(keycode):
-            del self._keyhandlers[keycode]
-
-
-    def _SetKeyHandler(self, char, func):
-        """
-        This function adds and/or replaces key event handling functions
-        for ascii characters.  <func> should take the event as argument
-        and return False if no further action on the key is necessary.
-        """
-        self._SetKeycodeHandler(ord(char), func)
-
-
-    def _AddNavKeycode(self, keycode, handler=None):
-        """
-        This function allows a derived subclass to augment the list of
-        keycodes that are considered "navigational" keys.
-        """
-        self._nav.append(keycode)
-        if handler:
-            self._keyhandlers[keycode] = handler
-        elif self.keyhandlers.has_key(keycode):
-            del self._keyhandlers[keycode]
-
-
-
-    def _AddNavKey(self, char, handler=None):
-        """
-        This function is a convenience function so you don't have to
-        remember to call ord() for ascii chars to be used for navigation.
-        """
-        self._AddNavKeycode(ord(char), handler)
-
-
-    def _GetNavKeycodes(self):
-        """
-        This function retrieves the current list of navigational keycodes for
-        the control.
-        """
-        return self._nav
-
-
-    def _SetNavKeycodes(self, keycode_func_tuples):
-        """
-        This function allows you to replace the current list of keycode processed
-        as navigation keys, and bind associated optional keyhandlers.
-        """
-        self._nav = []
-        for keycode, func in keycode_func_tuples:
-            self._nav.append(keycode)
-            if func:
-                self._keyhandlers[keycode] = func
-            elif self.keyhandlers.has_key(keycode):
-                del self._keyhandlers[keycode]
-
-
-    def _processMask(self, mask):
-        """
-        This subroutine expands {n} syntax in mask strings, and looks for escaped
-        special characters and returns the expanded mask, and an dictionary
-        of booleans indicating whether or not a given position in the mask is
-        a mask character or not.
-        """
-##        dbg('_processMask: mask', mask, indent=1)
-        # regular expression for parsing c{n} syntax:
-        rex = re.compile('([' +string.join(maskchars,"") + '])\{(\d+)\}')
-        s = mask
-        match = rex.search(s)
-        while match:    # found an(other) occurrence
-            maskchr = s[match.start(1):match.end(1)]            # char to be repeated
-            repcount = int(s[match.start(2):match.end(2)])      # the number of times
-            replacement = string.join( maskchr * repcount, "")  # the resulting substr
-            s = s[:match.start(1)] + replacement + s[match.end(2)+1:]   #account for trailing '}'
-            match = rex.search(s)                               # look for another such entry in mask
-
-        self._decimalChar = self._ctrl_constraints._decimalChar
-        self._shiftDecimalChar = self._ctrl_constraints._shiftDecimalChar
-
-        self._isFloat      = _isFloatingPoint(s) and not self._ctrl_constraints._validRegex
-        self._isInt      = _isInteger(s) and not self._ctrl_constraints._validRegex
-        self._signOk     = '-' in self._ctrl_constraints._formatcodes and (self._isFloat or self._isInt)
-        self._useParens  = self._ctrl_constraints._useParensForNegatives
-        self._isNeg      = False
-####        dbg('self._signOk?', self._signOk, 'self._useParens?', self._useParens)
-####        dbg('isFloatingPoint(%s)?' % (s), _isFloatingPoint(s),
-##            'ctrl regex:', self._ctrl_constraints._validRegex)
-
-        if self._signOk and s[0] != ' ':
-            s = ' ' + s
-            if self._ctrl_constraints._defaultValue and self._ctrl_constraints._defaultValue[0] != ' ':
-                self._ctrl_constraints._defaultValue = ' ' + self._ctrl_constraints._defaultValue
-            self._signpos = 0
-
-            if self._useParens:
-                s += ' '
-                self._ctrl_constraints._defaultValue += ' '
-
-
-        # Now, go build up a dictionary of booleans, indexed by position,
-        # indicating whether or not a given position is masked or not.
-        # Also, strip out any '|' chars, adjusting the mask as necessary,
-        # marking the appropriate positions for field boundaries:
-        ismasked = {}
-        explicit_field_boundaries = []
-        i = 0
-        while i < len(s):
-            if s[i] == '\\':            # if escaped character:
-                ismasked[i] = False     #     mark position as not a mask char
-                if i+1 < len(s):        #     if another char follows...
-                    s = s[:i] + s[i+1:] #         elide the '\'
-                    if i+2 < len(s) and s[i+1] == '\\':
-                        # if next char also a '\', char is a literal '\'
-                        s = s[:i] + s[i+1:]     # elide the 2nd '\' as well
-                i += 1                      # increment to next char
-            elif s[i] == '|':
-                s = s[:i] + s[i+1:] #         elide the '|'
-                explicit_field_boundaries.append(i)
-                # keep index where it is:
-            else:                       # else if special char, mark position accordingly
-                ismasked[i] = s[i] in maskchars
-####                dbg('ismasked[%d]:' % i, ismasked[i], s)
-                i += 1                      # increment to next char
-####        dbg('ismasked:', ismasked)
-##        dbg('new mask: "%s"' % s, indent=0)
-
-        return s, ismasked, explicit_field_boundaries
-
-
-    def _calcFieldExtents(self):
-        """
-        Subroutine responsible for establishing/configuring field instances with
-        indices and editable extents appropriate to the specified mask, and building
-        the lookup table mapping each position to the corresponding field.
-        """
-        self._lookupField = {}
-        if self._mask:
-
-            ## Create dictionary of positions,characters in mask
-            self.maskdict = {}
-            for charnum in range( len( self._mask)):
-                self.maskdict[charnum] = self._mask[charnum:charnum+1]
-
-            # For the current mask, create an ordered list of field extents
-            # and a dictionary of positions that map to field indices:
-
-            if self._signOk: start = 1
-            else: start = 0
-
-            if self._isFloat:
-                # Skip field "discovery", and just construct a 2-field control with appropriate
-                # constraints for a floating-point entry.
-
-                # .setdefault always constructs 2nd argument even if not needed, so we do this
-                # the old-fashioned way...
-                if not self._fields.has_key(0):
-                    self._fields[0] = Field()
-                if not self._fields.has_key(1):
-                    self._fields[1] = Field()
-
-                self._decimalpos = string.find( self._mask, '.')
-##                dbg('decimal pos =', self._decimalpos)
-
-                formatcodes = self._fields[0]._GetParameter('formatcodes')
-                if 'R' not in formatcodes: formatcodes += 'R'
-                self._fields[0]._SetParameters(index=0, extent=(start, self._decimalpos),
-                                               mask=self._mask[start:self._decimalpos], formatcodes=formatcodes)
-                end = len(self._mask)
-                if self._signOk and self._useParens:
-                    end -= 1
-                self._fields[1]._SetParameters(index=1, extent=(self._decimalpos+1, end),
-                                               mask=self._mask[self._decimalpos+1:end])
-
-                for i in range(self._decimalpos+1):
-                    self._lookupField[i] = 0
-
-                for i in range(self._decimalpos+1, len(self._mask)+1):
-                    self._lookupField[i] = 1
-
-            elif self._isInt:
-                # Skip field "discovery", and just construct a 1-field control with appropriate
-                # constraints for a integer entry.
-                if not self._fields.has_key(0):
-                    self._fields[0] = Field(index=0)
-                end = len(self._mask)
-                if self._signOk and self._useParens:
-                    end -= 1
-                self._fields[0]._SetParameters(index=0, extent=(start, end),
-                                               mask=self._mask[start:end])
-                for i in range(len(self._mask)+1):
-                    self._lookupField[i] = 0
-            else:
-                # generic control; parse mask to figure out where the fields are:
-                field_index = 0
-                pos = 0
-                i = self._findNextEntry(pos,adjustInsert=False)  # go to 1st entry point:
-                if i < len(self._mask):   # no editable chars!
-                    for j in range(pos, i+1):
-                        self._lookupField[j] = field_index
-                    pos = i       # figure out field for 1st editable space:
-
-                while i <= len(self._mask):
-####                    dbg('searching: outer field loop: i = ', i)
-                    if self._isMaskChar(i):
-####                        dbg('1st char is mask char; recording edit_start=', i)
-                        edit_start = i
-                        # Skip to end of editable part of current field:
-                        while i < len(self._mask) and self._isMaskChar(i):
-                            self._lookupField[i] = field_index
-                            i += 1
-                            if i in self._explicit_field_boundaries:
-                                break
-####                        dbg('edit_end =', i)
-                        edit_end = i
-                        self._lookupField[i] = field_index
-####                        dbg('self._fields.has_key(%d)?' % field_index, self._fields.has_key(field_index))
-                        if not self._fields.has_key(field_index):
-                            kwargs = Field.valid_params.copy()
-                            kwargs['index'] = field_index
-                            kwargs['extent'] = (edit_start, edit_end)
-                            kwargs['mask'] = self._mask[edit_start:edit_end]
-                            self._fields[field_index] = Field(**kwargs)
-                        else:
-                            self._fields[field_index]._SetParameters(
-                                                                index=field_index,
-                                                                extent=(edit_start, edit_end),
-                                                                mask=self._mask[edit_start:edit_end])
-                    pos = i
-                    i = self._findNextEntry(pos, adjustInsert=False)  # go to next field:
-####                    dbg('next entry:', i)
-                    if i > pos:
-                        for j in range(pos, i+1):
-                            self._lookupField[j] = field_index
-                    if i >= len(self._mask):
-                        break           # if past end, we're done
-                    else:
-                        field_index += 1
-####                        dbg('next field:', field_index)
-
-        indices = self._fields.keys()
-        indices.sort()
-        self._field_indices = indices[1:]
-####        dbg('lookupField map:', indent=1)
-##        for i in range(len(self._mask)):
-####            dbg('pos %d:' % i, self._lookupField[i])
-####        dbg(indent=0)
-
-        # Verify that all field indices specified are valid for mask:
-        for index in self._fields.keys():
-            if index not in [-1] + self._lookupField.values():
-                ie = IndexError('field %d is not a valid field for mask "%s"' % (index, self._mask))
-                ie.index = index
-                raise ie
-
-
-
-    def _calcTemplate(self, reset_fillchar, reset_default):
-        """
-        Subroutine for processing current fillchars and default values for
-        whole control and individual fields, constructing the resulting
-        overall template, and adjusting the current value as necessary.
-        """
-        default_set = False
-        if self._ctrl_constraints._defaultValue:
-            default_set = True
-        else:
-            for field in self._fields.values():
-                if field._defaultValue and not reset_default:
-                    default_set = True
-##        dbg('default set?', default_set)
-
-        # Determine overall new template for control, and keep track of previous
-        # values, so that current control value can be modified as appropriate:
-        if self.controlInitialized: curvalue = list(self._GetValue())
-        else:                       curvalue = None
-
-        if hasattr(self, '_fillChar'): old_fillchars = self._fillChar
-        else:                          old_fillchars = None
-
-        if hasattr(self, '_template'): old_template = self._template
-        else:                          old_template = None
-
-        self._template = ""
-
-        self._fillChar = {}
-        reset_value = False
-
-        for field in self._fields.values():
-            field._template = ""
-
-        for pos in range(len(self._mask)):
-####            dbg('pos:', pos)
-            field = self._FindField(pos)
-####            dbg('field:', field._index)
-            start, end = field._extent
-
-            if pos == 0 and self._signOk:
-                self._template = ' ' # always make 1st 1st position blank, regardless of fillchar
-            elif self._isFloat and pos == self._decimalpos:
-                self._template += self._decimalChar
-            elif self._isMaskChar(pos):
-                if field._fillChar != self._ctrl_constraints._fillChar and not reset_fillchar:
-                    fillChar = field._fillChar
-                else:
-                    fillChar = self._ctrl_constraints._fillChar
-                self._fillChar[pos] = fillChar
-
-                # Replace any current old fillchar with new one in current value;
-                # if action required, set reset_value flag so we can take that action
-                # after we're all done
-                if self.controlInitialized and old_fillchars and old_fillchars.has_key(pos) and curvalue:
-                    if curvalue[pos] == old_fillchars[pos] and old_fillchars[pos] != fillChar:
-                        reset_value = True
-                        curvalue[pos] = fillChar
-
-                if not field._defaultValue and not self._ctrl_constraints._defaultValue:
-####                    dbg('no default value')
-                    self._template += fillChar
-                    field._template += fillChar
-
-                elif field._defaultValue and not reset_default:
-####                    dbg('len(field._defaultValue):', len(field._defaultValue))
-####                    dbg('pos-start:', pos-start)
-                    if len(field._defaultValue) > pos-start:
-####                        dbg('field._defaultValue[pos-start]: "%s"' % field._defaultValue[pos-start])
-                        self._template += field._defaultValue[pos-start]
-                        field._template += field._defaultValue[pos-start]
-                    else:
-####                        dbg('field default not long enough; using fillChar')
-                        self._template += fillChar
-                        field._template += fillChar
-                else:
-                    if len(self._ctrl_constraints._defaultValue) > pos:
-####                        dbg('using control default')
-                        self._template += self._ctrl_constraints._defaultValue[pos]
-                        field._template += self._ctrl_constraints._defaultValue[pos]
-                    else:
-####                        dbg('ctrl default not long enough; using fillChar')
-                        self._template += fillChar
-                        field._template += fillChar
-####                dbg('field[%d]._template now "%s"' % (field._index, field._template))
-####                dbg('self._template now "%s"' % self._template)
-            else:
-                self._template += self._mask[pos]
-
-        self._fields[-1]._template = self._template     # (for consistency)
-
-        if curvalue:    # had an old value, put new one back together
-            newvalue = string.join(curvalue, "")
-        else:
-            newvalue = None
-
-        if default_set:
-            self._defaultValue = self._template
-##            dbg('self._defaultValue:', self._defaultValue)
-            if not self.IsEmpty(self._defaultValue) and not self.IsValid(self._defaultValue):
-####                dbg(indent=0)
-                ve = ValueError('Default value of "%s" is not a valid value for control "%s"' % (self._defaultValue, self.name))
-                ve.value = self._defaultValue
-                raise ve
-
-            # if no fillchar change, but old value == old template, replace it:
-            if newvalue == old_template:
-                newvalue = self._template
-                reset_value = True
-        else:
-            self._defaultValue = None
-
-        if reset_value:
-##            dbg('resetting value to: "%s"' % newvalue)
-            pos = self._GetInsertionPoint()
-            sel_start, sel_to = self._GetSelection()
-            self._SetValue(newvalue)
-            self._SetInsertionPoint(pos)
-            self._SetSelection(sel_start, sel_to)
-
-
-    def _propagateConstraints(self, **reset_args):
-        """
-        Subroutine for propagating changes to control-level constraints and
-        formatting to the individual fields as appropriate.
-        """
-        parent_codes = self._ctrl_constraints._formatcodes
-        parent_includes = self._ctrl_constraints._includeChars
-        parent_excludes = self._ctrl_constraints._excludeChars
-        for i in self._field_indices:
-            field = self._fields[i]
-            inherit_args = {}
-            if len(self._field_indices) == 1:
-                inherit_args['formatcodes'] = parent_codes
-                inherit_args['includeChars'] = parent_includes
-                inherit_args['excludeChars'] = parent_excludes
-            else:
-                field_codes = current_codes = field._GetParameter('formatcodes')
-                for c in parent_codes:
-                    if c not in field_codes: field_codes += c
-                if field_codes != current_codes:
-                    inherit_args['formatcodes'] = field_codes
-
-                include_chars = current_includes = field._GetParameter('includeChars')
-                for c in parent_includes:
-                    if not c in include_chars: include_chars += c
-                if include_chars != current_includes:
-                    inherit_args['includeChars'] = include_chars
-
-                exclude_chars = current_excludes = field._GetParameter('excludeChars')
-                for c in parent_excludes:
-                    if not c in exclude_chars: exclude_chars += c
-                if exclude_chars != current_excludes:
-                    inherit_args['excludeChars'] = exclude_chars
-
-            if reset_args.has_key('defaultValue') and reset_args['defaultValue']:
-                inherit_args['defaultValue'] = ""   # (reset for field)
-
-            for param in Field.propagating_params:
-####                dbg('reset_args.has_key(%s)?' % param, reset_args.has_key(param))
-####                dbg('reset_args.has_key(%(param)s) and reset_args[%(param)s]?' % locals(), reset_args.has_key(param) and reset_args[param])
-                if reset_args.has_key(param):
-                    inherit_args[param] = self.GetCtrlParameter(param)
-####                    dbg('inherit_args[%s]' % param, inherit_args[param])
-
-            if inherit_args:
-                field._SetParameters(**inherit_args)
-                field._ValidateParameters(**inherit_args)
-
-
-    def _validateChoices(self):
-        """
-        Subroutine that validates that all choices for given fields are at
-        least of the necessary length, and that they all would be valid pastes
-        if pasted into their respective fields.
-        """
-        for field in self._fields.values():
-            if field._choices:
-                index = field._index
-                if len(self._field_indices) == 1 and index == 0 and field._choices == self._ctrl_constraints._choices:
-##                    dbg('skipping (duplicate) choice validation of field 0')
-                    continue
-####                dbg('checking for choices for field', field._index)
-                start, end = field._extent
-                field_length = end - start
-####                dbg('start, end, length:', start, end, field_length)
-                for choice in field._choices:
-####                    dbg('testing "%s"' % choice)
-                    valid_paste, ignore, replace_to = self._validatePaste(choice, start, end)
-                    if not valid_paste:
-####                        dbg(indent=0)
-                        ve = ValueError('"%s" could not be entered into field %d of control "%s"' % (choice, index, self.name))
-                        ve.value = choice
-                        ve.index = index
-                        raise ve
-                    elif replace_to > end:
-####                        dbg(indent=0)
-                        ve = ValueError('"%s" will not fit into field %d of control "%s"' (choice, index, self.name))
-                        ve.value = choice
-                        ve.index = index
-                        raise ve
-
-####                    dbg(choice, 'valid in field', index)
-
-
-    def _configure(self, mask, **reset_args):
-        """
-        This function sets flags for automatic styling options.  It is
-        called whenever a control or field-level parameter is set/changed.
-
-        This routine does the bulk of the interdependent parameter processing, determining
-        the field extents of the mask if changed, resetting parameters as appropriate,
-        determining the overall template value for the control, etc.
-
-        reset_args is supplied if called from control's .SetCtrlParameters()
-        routine, and indicates which if any parameters which can be
-        overridden by individual fields have been reset by request for the
-        whole control.
-
-        """
-##        dbg(suspend=1)
-##        dbg('MaskedEditMixin::_configure("%s")' % mask, indent=1)
-
-        # Preprocess specified mask to expand {n} syntax, handle escaped
-        # mask characters, etc and build the resulting positionally keyed
-        # dictionary for which positions are mask vs. template characters:
-        self._mask, self._ismasked, self._explicit_field_boundaries = self._processMask(mask)
-        self._masklength = len(self._mask)
-####        dbg('processed mask:', self._mask)
-
-        # Preserve original mask specified, for subsequent reprocessing
-        # if parameters change.
-##        dbg('mask: "%s"' % self._mask, 'previous mask: "%s"' % self._previous_mask)
-        self._previous_mask = mask    # save unexpanded mask for next time
-            # Set expanded mask and extent of field -1 to width of entire control:
-        self._ctrl_constraints._SetParameters(mask = self._mask, extent=(0,self._masklength))
-
-        # Go parse mask to determine where each field is, construct field
-        # instances as necessary, configure them with those extents, and
-        # build lookup table mapping each position for control to its corresponding
-        # field.
-####        dbg('calculating field extents')
-
-        self._calcFieldExtents()
-
-
-        # Go process defaultValues and fillchars to construct the overall
-        # template, and adjust the current value as necessary:
-        reset_fillchar = reset_args.has_key('fillChar') and reset_args['fillChar']
-        reset_default = reset_args.has_key('defaultValue') and reset_args['defaultValue']
-
-####        dbg('calculating template')
-        self._calcTemplate(reset_fillchar, reset_default)
-
-        # Propagate control-level formatting and character constraints to each
-        # field if they don't already have them; if only one field, propagate
-        # control-level validation constraints to field as well:
-####        dbg('propagating constraints')
-        self._propagateConstraints(**reset_args)
-
-
-        if self._isFloat and self._fields[0]._groupChar == self._decimalChar:
-            raise AttributeError('groupChar (%s) and decimalChar (%s) must be distinct.' %
-                                 (self._fields[0]._groupChar, self._decimalChar) )
-
-####        dbg('fields:', indent=1)
-##        for i in [-1] + self._field_indices:
-####            dbg('field %d:' % i, self._fields[i].__dict__)
-####        dbg(indent=0)
-
-        # Set up special parameters for numeric control, if appropriate:
-        if self._signOk:
-            self._signpos = 0   # assume it starts here, but it will move around on floats
-            signkeys = ['-', '+', ' ']
-            if self._useParens:
-                signkeys += ['(', ')']
-            for key in signkeys:
-                keycode = ord(key)
-                if not self._keyhandlers.has_key(keycode):
-                    self._SetKeyHandler(key, self._OnChangeSign)
-        elif self._isInt or self._isFloat:
-            signkeys = ['-', '+', ' ', '(', ')']
-            for key in signkeys:
-                keycode = ord(key)
-                if self._keyhandlers.has_key(keycode) and self._keyhandlers[keycode] == self._OnChangeSign:
-                    self._SetKeyHandler(key, None)
-
-
-
-        if self._isFloat or self._isInt:
-            if self.controlInitialized:
-                value = self._GetValue()
-####                dbg('value: "%s"' % value, 'len(value):', len(value),
-##                    'len(self._ctrl_constraints._mask):',len(self._ctrl_constraints._mask))
-                if len(value) < len(self._ctrl_constraints._mask):
-                    newvalue = value
-                    if self._useParens and len(newvalue) < len(self._ctrl_constraints._mask) and newvalue.find('(') == -1:
-                        newvalue += ' '
-                    if self._signOk and len(newvalue) < len(self._ctrl_constraints._mask) and newvalue.find(')') == -1:
-                        newvalue = ' ' + newvalue
-                    if len(newvalue) < len(self._ctrl_constraints._mask):
-                        if self._ctrl_constraints._alignRight:
-                            newvalue = newvalue.rjust(len(self._ctrl_constraints._mask))
-                        else:
-                            newvalue = newvalue.ljust(len(self._ctrl_constraints._mask))
-##                    dbg('old value: "%s"' % value)
-##                    dbg('new value: "%s"' % newvalue)
-                    try:
-                        self._SetValue(newvalue)
-                    except Exception, e:
-##                        dbg('exception raised:', e, 'resetting to initial value')
-                        self._SetInitialValue()
-
-                elif len(value) > len(self._ctrl_constraints._mask):
-                    newvalue = value
-                    if not self._useParens and newvalue[-1] == ' ':
-                        newvalue = newvalue[:-1]
-                    if not self._signOk and len(newvalue) > len(self._ctrl_constraints._mask):
-                        newvalue = newvalue[1:]
-                    if not self._signOk:
-                        newvalue, signpos, right_signpos = self._getSignedValue(newvalue)
-
-##                    dbg('old value: "%s"' % value)
-##                    dbg('new value: "%s"' % newvalue)
-                    try:
-                        self._SetValue(newvalue)
-                    except Exception, e:
-##                        dbg('exception raised:', e, 'resetting to initial value')
-                        self._SetInitialValue()
-                elif not self._signOk and ('(' in value or '-' in value):
-                    newvalue, signpos, right_signpos = self._getSignedValue(value)
-##                    dbg('old value: "%s"' % value)
-##                    dbg('new value: "%s"' % newvalue)
-                    try:
-                        self._SetValue(newvalue)
-                    except e:
-##                        dbg('exception raised:', e, 'resetting to initial value')
-                        self._SetInitialValue()
-
-            # Replace up/down arrow default handling:
-            # make down act like tab, up act like shift-tab:
-
-####            dbg('Registering numeric navigation and control handlers (if not already set)')
-            if not self._keyhandlers.has_key(wx.WXK_DOWN):
-                self._SetKeycodeHandler(wx.WXK_DOWN, self._OnChangeField)
-            if not self._keyhandlers.has_key(wx.WXK_NUMPAD_DOWN):
-                self._SetKeycodeHandler(wx.WXK_DOWN, self._OnChangeField)
-            if not self._keyhandlers.has_key(wx.WXK_UP):
-                self._SetKeycodeHandler(wx.WXK_UP, self._OnUpNumeric)  # (adds "shift" to up arrow, and calls _OnChangeField)
-            if not self._keyhandlers.has_key(wx.WXK_NUMPAD_UP):
-                self._SetKeycodeHandler(wx.WXK_UP, self._OnUpNumeric)  # (adds "shift" to up arrow, and calls _OnChangeField)
-
-            # On ., truncate contents right of cursor to decimal point (if any)
-            # leaves cursor after decimal point if floating point, otherwise at 0.
-            if not self._keyhandlers.has_key(ord(self._decimalChar)) or self._keyhandlers[ord(self._decimalChar)] != self._OnDecimalPoint:
-                self._SetKeyHandler(self._decimalChar, self._OnDecimalPoint)
-    
-            if not self._keyhandlers.has_key(ord(self._shiftDecimalChar)) or self._keyhandlers[ord(self._shiftDecimalChar)] != self._OnChangeField:
-                self._SetKeyHandler(self._shiftDecimalChar, self._OnChangeField)   # (Shift-'.' == '>' on US keyboards)
-
-            # Allow selective insert of groupchar in numbers:
-            if not self._keyhandlers.has_key(ord(self._fields[0]._groupChar)) or self._keyhandlers[ord(self._fields[0]._groupChar)] != self._OnGroupChar:
-                self._SetKeyHandler(self._fields[0]._groupChar, self._OnGroupChar)
-
-##        dbg(indent=0, suspend=0)
-
-
-    def _SetInitialValue(self, value=""):
-        """
-        fills the control with the generated or supplied default value.
-        It will also set/reset the font if necessary and apply
-        formatting to the control at this time.
-        """
-##        dbg('MaskedEditMixin::_SetInitialValue("%s")' % value, indent=1)
-        if not value:
-            self._prevValue = self._curValue = self._template
-            # don't apply external validation rules in this case, as template may
-            # not coincide with "legal" value...
-            try:
-                self._SetValue(self._curValue)  # note the use of "raw" ._SetValue()...
-            except Exception, e:
-##                dbg('exception thrown:', e, indent=0)
-                raise
-        else:
-            # Otherwise apply validation as appropriate to passed value:
-####            dbg('value = "%s", length:' % value, len(value))
-            self._prevValue = self._curValue = value
-            try:
-                self.SetValue(value)            # use public (validating) .SetValue()
-            except Exception, e:
-##                dbg('exception thrown:', e, indent=0)
-                raise
-
-
-        # Set value/type-specific formatting
-        self._applyFormatting()
-##        dbg(indent=0)
-
-
-    def _calcSize(self, size=None):
-        """ Calculate automatic size if allowed; must be called after the base control is instantiated"""
-####        dbg('MaskedEditMixin::_calcSize', indent=1)
-        cont = (size is None or size == wx.DefaultSize)
-
-        if cont and self._autofit:
-            sizing_text = 'M' * self._masklength
-            if wx.Platform != "__WXMSW__":   # give it a little extra space
-                sizing_text += 'M'
-            if wx.Platform == "__WXMAC__":   # give it even a little more...
-                sizing_text += 'M'
-####            dbg('len(sizing_text):', len(sizing_text), 'sizing_text: "%s"' % sizing_text)
-            w, h = self.GetTextExtent(sizing_text)
-            size = (w+4, self.GetSize().height)
-####            dbg('size:', size, indent=0)
-        return size
-
-
-    def _setFont(self):
-        """ Set the control's font typeface -- pass the font name as str."""
-####        dbg('MaskedEditMixin::_setFont', indent=1)
-        if not self._useFixedWidthFont:
-            self._font = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT)
-        else:
-            font = self.GetFont()   # get size, weight, etc from current font
-
-            # Set to teletype font (guaranteed to be mappable to all wxWindows
-            # platforms:
-            self._font = wx.Font( font.GetPointSize(), wx.TELETYPE, font.GetStyle(),
-                                 font.GetWeight(), font.GetUnderlined())
-####            dbg('font string: "%s"' % font.GetNativeFontInfo().ToString())
-
-        self.SetFont(self._font)
-####        dbg(indent=0)
-
-
-    def _OnTextChange(self, event):
-        """
-        Handler for EVT_TEXT event.
-        self._Change() is provided for subclasses, and may return False to
-        skip this method logic.  This function returns True if the event
-        detected was a legitimate event, or False if it was a "bogus"
-        EVT_TEXT event.  (NOTE: There is currently an issue with calling
-        .SetValue from within the EVT_CHAR handler that causes duplicate
-        EVT_TEXT events for the same change.)
-        """
-        newvalue = self._GetValue()
-##        dbg('MaskedEditMixin::_OnTextChange: value: "%s"' % newvalue, indent=1)
-        bValid = False
-        if self._ignoreChange:      # ie. if an "intermediate text change event"
-##            dbg(indent=0)
-            return bValid
-
-        ##! WS: For some inexplicable reason, every wx.TextCtrl.SetValue
-        ## call is generating two (2) EVT_TEXT events.  On certain platforms,
-        ## (eg. linux/GTK) the 1st is an empty string value.
-        ## This is the only mechanism I can find to mask this problem:
-        if newvalue == self._curValue or len(newvalue) == 0:
-##            dbg('ignoring bogus text change event', indent=0)
-            pass
-        else:
-##            dbg('curvalue: "%s", newvalue: "%s", len(newvalue): %d' % (self._curValue, newvalue, len(newvalue)))
-            if self._Change():
-                if self._signOk and self._isNeg and newvalue.find('-') == -1 and newvalue.find('(') == -1:
-##                    dbg('clearing self._isNeg')
-                    self._isNeg = False
-                    text, self._signpos, self._right_signpos = self._getSignedValue()
-                self._CheckValid()  # Recolor control as appropriate
-##            dbg('calling event.Skip()')
-            event.Skip()
-            bValid = True
-        self._prevValue = self._curValue    # save for undo
-        self._curValue = newvalue           # Save last seen value for next iteration
-##        dbg(indent=0)
-        return bValid
-
-
-    def _OnKeyDown(self, event):
-        """
-        This function allows the control to capture Ctrl-events like Ctrl-tab,
-        that are not normally seen by the "cooked" EVT_CHAR routine.
-        """
-        # Get keypress value, adjusted by control options (e.g. convert to upper etc)
-        key    = event.GetKeyCode()
-        if key in self._nav and event.ControlDown():
-            # then this is the only place we will likely see these events;
-            # process them now:
-##            dbg('MaskedEditMixin::OnKeyDown: calling _OnChar')
-            self._OnChar(event)
-            return
-        # else allow regular EVT_CHAR key processing
-        event.Skip()
-
-
-    def _OnChar(self, event):
-        """
-        This is the engine of MaskedEdit controls.  It examines each keystroke,
-        decides if it's allowed, where it should go or what action to take.
-        """
-##        dbg('MaskedEditMixin::_OnChar', indent=1)
-
-        # Get keypress value, adjusted by control options (e.g. convert to upper etc)
-        key = event.GetKeyCode()
-        orig_pos = self._GetInsertionPoint()
-        orig_value = self._GetValue()
-##        dbg('keycode = ', key)
-##        dbg('current pos = ', orig_pos)
-##        dbg('current selection = ', self._GetSelection())
-
-        if not self._Keypress(key):
-##            dbg(indent=0)
-            return
-
-        # If no format string for this control, or the control is marked as "read-only",
-        # skip the rest of the special processing, and just "do the standard thing:"
-        if not self._mask or not self._IsEditable():
-            event.Skip()
-##            dbg(indent=0)
-            return
-
-        # Process navigation and control keys first, with
-        # position/selection unadulterated:
-        if key in self._nav + self._control:
-            if self._keyhandlers.has_key(key):
-                keep_processing = self._keyhandlers[key](event)
-                if self._GetValue() != orig_value:
-                    self.modified = True
-                if not keep_processing:
-##                    dbg(indent=0)
-                    return
-                self._applyFormatting()
-##                dbg(indent=0)
-                return
-
-        # Else... adjust the position as necessary for next input key,
-        # and determine resulting selection:
-        pos = self._adjustPos( orig_pos, key )    ## get insertion position, adjusted as needed
-        sel_start, sel_to = self._GetSelection()                ## check for a range of selected text
-##        dbg("pos, sel_start, sel_to:", pos, sel_start, sel_to)
-
-        keep_processing = True
-        # Capture user past end of format field
-        if pos > len(self.maskdict):
-##            dbg("field length exceeded:",pos)
-            keep_processing = False
-
-        key = self._adjustKey(pos, key)     # apply formatting constraints to key:
-
-        if self._keyhandlers.has_key(key):
-            # there's an override for default behavior; use override function instead
-##            dbg('using supplied key handler:', self._keyhandlers[key])
-            keep_processing = self._keyhandlers[key](event)
-            if self._GetValue() != orig_value:
-                self.modified = True
-            if not keep_processing:
-##                dbg(indent=0)
-                return
-            # else skip default processing, but do final formatting
-        if key in wx_control_keycodes:
-##            dbg('key in wx_control_keycodes')
-            event.Skip()                # non-printable; let base control handle it
-            keep_processing = False
-        else:
-            field = self._FindField(pos)
-
-            if 'unicode' in wx.PlatformInfo:
-                if key < 256:
-                    char = chr(key) # (must work if we got this far)
-                    char = char.decode(self._defaultEncoding)
-                else:
-                    char = unichr(event.GetUnicodeKey())
-##                    dbg('unicode char:', char)
-                excludes = u''
-                if type(field._excludeChars) != types.UnicodeType:
-                    excludes += field._excludeChars.decode(self._defaultEncoding)
-                if type(self._ctrl_constraints) != types.UnicodeType:
-                    excludes += self._ctrl_constraints._excludeChars.decode(self._defaultEncoding)
-            else:
-                char = chr(key) # (must work if we got this far)
-                excludes = field._excludeChars + self._ctrl_constraints._excludeChars
-
-##                dbg("key ='%s'" % chr(key))
-                if chr(key) == ' ':
-##                dbg('okSpaces?', field._okSpaces)
-                    pass
-
-
-            if char in excludes:
-                keep_processing = False
-
-            if keep_processing and self._isCharAllowed( char, pos, checkRegex = True ):
-##                dbg("key allowed by mask")
-                # insert key into candidate new value, but don't change control yet:
-                oldstr = self._GetValue()
-                newstr, newpos, new_select_to, match_field, match_index = self._insertKey(
-                                char, pos, sel_start, sel_to, self._GetValue(), allowAutoSelect = True)
-##                dbg("str with '%s' inserted:" % char, '"%s"' % newstr)
-                if self._ctrl_constraints._validRequired and not self.IsValid(newstr):
-##                    dbg('not valid; checking to see if adjusted string is:')
-                    keep_processing = False
-                    if self._isFloat and newstr != self._template:
-                        newstr = self._adjustFloat(newstr)
-##                        dbg('adjusted str:', newstr)
-                        if self.IsValid(newstr):
-##                            dbg("it is!")
-                            keep_processing = True
-                            wx.CallAfter(self._SetInsertionPoint, self._decimalpos)
-                    if not keep_processing:
-##                        dbg("key disallowed by validation")
-                        if not wx.Validator_IsSilent() and orig_pos == pos:
-                            wx.Bell()
-
-                if keep_processing:
-                    unadjusted = newstr
-
-                    # special case: adjust date value as necessary:
-                    if self._isDate and newstr != self._template:
-                        newstr = self._adjustDate(newstr)
-##                    dbg('adjusted newstr:', newstr)
-
-                    if newstr != orig_value:
-                        self.modified = True
-
-                    wx.CallAfter(self._SetValue, newstr)
-
-                    # Adjust insertion point on date if just entered 2 digit year, and there are now 4 digits:
-                    if not self.IsDefault() and self._isDate and self._4digityear:
-                        year2dig = self._dateExtent - 2
-                        if pos == year2dig and unadjusted[year2dig] != newstr[year2dig]:
-                            newpos = pos+2
-
-##                    dbg('queuing insertion point: (%d)' % newpos)
-                    wx.CallAfter(self._SetInsertionPoint, newpos)
-
-                    if match_field is not None:
-##                        dbg('matched field')
-                        self._OnAutoSelect(match_field, match_index)
-
-                    if new_select_to != newpos:
-##                        dbg('queuing selection: (%d, %d)' % (newpos, new_select_to))
-                        wx.CallAfter(self._SetSelection, newpos, new_select_to)
-                    else:
-                        newfield = self._FindField(newpos)
-                        if newfield != field and newfield._selectOnFieldEntry:
-##                            dbg('queuing insertion point: (%d)' % newfield._extent[0])
-                            wx.CallAfter(self._SetInsertionPoint, newfield._extent[0])
-##                            dbg('queuing selection: (%d, %d)' % (newfield._extent[0], newfield._extent[1]))
-                            wx.CallAfter(self._SetSelection, newfield._extent[0], newfield._extent[1])
-                        else:
-                            wx.CallAfter(self._SetSelection, newpos, new_select_to)
-                    keep_processing = False
-
-            elif keep_processing:
-##                dbg('char not allowed')
-                keep_processing = False
-                if (not wx.Validator_IsSilent()) and orig_pos == pos:
-                    wx.Bell()
-
-        self._applyFormatting()
-
-        # Move to next insertion point
-        if keep_processing and key not in self._nav:
-            pos = self._GetInsertionPoint()
-            next_entry = self._findNextEntry( pos )
-            if pos != next_entry:
-##                dbg("moving from %(pos)d to next valid entry: %(next_entry)d" % locals())
-                wx.CallAfter(self._SetInsertionPoint, next_entry )
-
-            if self._isTemplateChar(pos):
-                self._AdjustField(pos)
-##        dbg(indent=0)
-
-
-    def _FindFieldExtent(self, pos=None, getslice=False, value=None):
-        """ returns editable extent of field corresponding to
-        position pos, and, optionally, the contents of that field
-        in the control or the value specified.
-        Template chars are bound to the preceding field.
-        For masks beginning with template chars, these chars are ignored
-        when calculating the current field.
-
-        Eg: with template (###) ###-####,
-        >>> self._FindFieldExtent(pos=0)
-        1, 4
-        >>> self._FindFieldExtent(pos=1)
-        1, 4
-        >>> self._FindFieldExtent(pos=5)
-        1, 4
-        >>> self._FindFieldExtent(pos=6)
-        6, 9
-        >>> self._FindFieldExtent(pos=10)
-        10, 14
-        etc.
-        """
-##        dbg('MaskedEditMixin::_FindFieldExtent(pos=%s, getslice=%s)' % (str(pos), str(getslice)) ,indent=1)
-
-        field = self._FindField(pos)
-        if not field:
-            if getslice:
-                return None, None, ""
-            else:
-                return None, None
-        edit_start, edit_end = field._extent
-        if getslice:
-            if value is None: value = self._GetValue()
-            slice = value[edit_start:edit_end]
-##            dbg('edit_start:', edit_start, 'edit_end:', edit_end, 'slice: "%s"' % slice)
-##            dbg(indent=0)
-            return edit_start, edit_end, slice
-        else:
-##            dbg('edit_start:', edit_start, 'edit_end:', edit_end)
-##            dbg(indent=0)
-            return edit_start, edit_end
-
-
-    def _FindField(self, pos=None):
-        """
-        Returns the field instance in which pos resides.
-        Template chars are bound to the preceding field.
-        For masks beginning with template chars, these chars are ignored
-        when calculating the current field.
-
-        """
-####        dbg('MaskedEditMixin::_FindField(pos=%s)' % str(pos) ,indent=1)
-        if pos is None: pos = self._GetInsertionPoint()
-        elif pos < 0 or pos > self._masklength:
-            raise IndexError('position %s out of range of control' % str(pos))
-
-        if len(self._fields) == 0:
-##            dbg(indent=0)
-            return None
-
-        # else...
-####        dbg(indent=0)
-        return self._fields[self._lookupField[pos]]
-
-
-    def ClearValue(self):
-        """ Blanks the current control value by replacing it with the default value."""
-##        dbg("MaskedEditMixin::ClearValue - value reset to default value (template)")
-        self._SetValue( self._template )
-        self._SetInsertionPoint(0)
-        self.Refresh()
-
-
-    def _baseCtrlEventHandler(self, event):
-        """
-        This function is used whenever a key should be handled by the base control.
-        """
-        event.Skip()
-        return False
-
-
-    def _OnUpNumeric(self, event):
-        """
-        Makes up-arrow act like shift-tab should; ie. take you to start of
-        previous field.
-        """
-##        dbg('MaskedEditMixin::_OnUpNumeric', indent=1)
-        event.m_shiftDown = 1
-##        dbg('event.ShiftDown()?', event.ShiftDown())
-        self._OnChangeField(event)
-##        dbg(indent=0)
-
-
-    def _OnArrow(self, event):
-        """
-        Used in response to left/right navigation keys; makes these actions skip
-        over mask template chars.
-        """
-##        dbg("MaskedEditMixin::_OnArrow", indent=1)
-        pos = self._GetInsertionPoint()
-        keycode = event.GetKeyCode()
-        sel_start, sel_to = self._GetSelection()
-        entry_end = self._goEnd(getPosOnly=True)
-        if keycode in (wx.WXK_RIGHT, wx.WXK_DOWN, wx.WXK_NUMPAD_RIGHT, wx.WXK_NUMPAD_DOWN):
-            if( ( not self._isTemplateChar(pos) and pos+1 > entry_end)
-                or ( self._isTemplateChar(pos) and pos >= entry_end) ):
-##                dbg("can't advance", indent=0)
-                return False
-            elif self._isTemplateChar(pos):
-                self._AdjustField(pos)
-        elif keycode in (wx.WXK_LEFT, wx.WXK_UP, wx.WXK_NUMPAD_LEFT, wx.WXK_NUMPAD_UP) and sel_start == sel_to and pos > 0 and self._isTemplateChar(pos-1):
-##            dbg('adjusting field')
-            self._AdjustField(pos)
-
-        # treat as shifted up/down arrows as tab/reverse tab:
-        if event.ShiftDown() and keycode in (wx.WXK_UP, wx.WXK_DOWN, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_DOWN):
-            # remove "shifting" and treat as (forward) tab:
-            event.m_shiftDown = False
-            keep_processing = self._OnChangeField(event)
-
-        elif self._FindField(pos)._selectOnFieldEntry:
-            if( keycode in (wx.WXK_UP, wx.WXK_LEFT, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_LEFT)
-                and sel_start != 0
-                and self._isTemplateChar(sel_start-1)
-                and sel_start != self._masklength
-                and not self._signOk and not self._useParens):
-
-                # call _OnChangeField to handle "ctrl-shifted event"
-                # (which moves to previous field and selects it.)
-                event.m_shiftDown = True
-                event.m_ControlDown = True
-                keep_processing = self._OnChangeField(event)
-            elif( keycode in (wx.WXK_DOWN, wx.WXK_RIGHT, wx.WXK_NUMPAD_DOWN, wx.WXK_NUMPAD_RIGHT)
-                  and sel_to != self._masklength
-                  and self._isTemplateChar(sel_to)):
-
-                # when changing field to the right, ensure don't accidentally go left instead
-                event.m_shiftDown = False
-                keep_processing = self._OnChangeField(event)
-            else:
-                # treat arrows as normal, allowing selection
-                # as appropriate:
-##                dbg('using base ctrl event processing')
-                event.Skip()
-        else:
-            if( (sel_to == self._fields[0]._extent[0] and keycode in (wx.WXK_LEFT, wx.WXK_NUMPAD_LEFT) )
-                or (sel_to == self._masklength and keycode in (wx.WXK_RIGHT, wx.WXK_NUMPAD_RIGHT) ) ):
-                if not wx.Validator_IsSilent():
-                    wx.Bell()
-            else:
-                # treat arrows as normal, allowing selection
-                # as appropriate:
-##                dbg('using base event processing')
-                event.Skip()
-
-        keep_processing = False
-##        dbg(indent=0)
-        return keep_processing
-
-
-    def _OnCtrl_S(self, event):
-        """ Default Ctrl-S handler; prints value information if demo enabled. """
-##        dbg("MaskedEditMixin::_OnCtrl_S")
-        if self._demo:
-            print 'MaskedEditMixin.GetValue()       = "%s"\nMaskedEditMixin.GetPlainValue() = "%s"' % (self.GetValue(), self.GetPlainValue())
-            print "Valid? => " + str(self.IsValid())
-            print "Current field, start, end, value =", str( self._FindFieldExtent(getslice=True))
-        return False
-
-
-    def _OnCtrl_X(self, event=None):
-        """ Handles ctrl-x keypress in control and Cut operation on context menu.
-            Should return False to skip other processing. """
-##        dbg("MaskedEditMixin::_OnCtrl_X", indent=1)
-        self.Cut()
-##        dbg(indent=0)
-        return False
-
-    def _OnCtrl_C(self, event=None):
-        """ Handles ctrl-C keypress in control and Copy operation on context menu.
-            Uses base control handling. Should return False to skip other processing."""
-        self.Copy()
-        return False
-
-    def _OnCtrl_V(self, event=None):
-        """ Handles ctrl-V keypress in control and Paste operation on context menu.
-            Should return False to skip other processing. """
-##        dbg("MaskedEditMixin::_OnCtrl_V", indent=1)
-        self.Paste()
-##        dbg(indent=0)
-        return False
-
-    def _OnInsert(self, event=None):
-        """ Handles shift-insert and control-insert operations (paste and copy, respectively)"""
-##        dbg("MaskedEditMixin::_OnInsert", indent=1)
-        if event and isinstance(event, wx.KeyEvent):
-            if event.ShiftDown():
-                self.Paste()
-            elif event.ControlDown():
-                self.Copy()
-            # (else do nothing)
-        # (else do nothing)
-##        dbg(indent=0)
-        return False
-
-    def _OnDelete(self, event=None):
-        """ Handles shift-delete and delete operations (cut and erase, respectively)"""
-##        dbg("MaskedEditMixin::_OnDelete", indent=1)
-        if event and isinstance(event, wx.KeyEvent):
-            if event.ShiftDown():
-                self.Cut()
-            else:
-                self._OnErase(event)
-        else:
-            self._OnErase(event)
-##        dbg(indent=0)
-        return False
-
-    def _OnCtrl_Z(self, event=None):
-        """ Handles ctrl-Z keypress in control and Undo operation on context menu.
-            Should return False to skip other processing. """
-##        dbg("MaskedEditMixin::_OnCtrl_Z", indent=1)
-        self.Undo()
-##        dbg(indent=0)
-        return False
-
-    def _OnCtrl_A(self,event=None):
-        """ Handles ctrl-a keypress in control. Should return False to skip other processing. """
-        end = self._goEnd(getPosOnly=True)
-        if not event or (isinstance(event, wx.KeyEvent) and event.ShiftDown()):
-            wx.CallAfter(self._SetInsertionPoint, 0)
-            wx.CallAfter(self._SetSelection, 0, self._masklength)
-        else:
-            wx.CallAfter(self._SetInsertionPoint, 0)
-            wx.CallAfter(self._SetSelection, 0, end)
-        return False
-
-
-    def _OnErase(self, event=None, just_return_value=False):
-        """ Handles backspace and delete keypress in control. Should return False to skip other processing."""
-##        dbg("MaskedEditMixin::_OnErase", indent=1)
-        sel_start, sel_to = self._GetSelection()                   ## check for a range of selected text
-
-        if event is None:   # called as action routine from Cut() operation.
-            key = wx.WXK_DELETE
-        else:
-            key = event.GetKeyCode()
-
-        field = self._FindField(sel_to)
-        start, end = field._extent
-        value = self._GetValue()
-        oldstart = sel_start
-
-        # If trying to erase beyond "legal" bounds, disallow operation:
-        if( (sel_to == 0 and key == wx.WXK_BACK)
-            or (self._signOk and sel_to == 1 and value[0] == ' ' and key == wx.WXK_BACK)
-            or (sel_to == self._masklength and sel_start == sel_to and key in (wx.WXK_DELETE, wx.WXK_NUMPAD_DELETE) and not field._insertRight)
-            or (self._signOk and self._useParens
-                and sel_start == sel_to
-                and sel_to == self._masklength - 1
-                and value[sel_to] == ' ' and key in (wx.WXK_DELETE, wx.WXK_NUMPAD_DELETE) and not field._insertRight) ):
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-##            dbg(indent=0)
-            return False
-
-
-        if( field._insertRight                                  # an insert-right field
-            and value[start:end] != self._template[start:end]   # and field not empty
-            and sel_start >= start                              # and selection starts in field
-            and ((sel_to == sel_start                           # and no selection
-                  and sel_to == end                             # and cursor at right edge
-                  and key in (wx.WXK_BACK, wx.WXK_DELETE, wx.WXK_NUMPAD_DELETE))    # and either delete or backspace key
-                 or                                             # or
-                 (key == wx.WXK_BACK                               # backspacing
-                    and (sel_to == end                          # and selection ends at right edge
-                         or sel_to < end and field._allowInsert)) ) ):  # or allow right insert at any point in field
-
-##            dbg('delete left')
-            # if backspace but left of cursor is empty, adjust cursor right before deleting
-            while( key == wx.WXK_BACK
-                   and sel_start == sel_to
-                   and sel_start < end
-                   and value[start:sel_start] == self._template[start:sel_start]):
-                sel_start += 1
-                sel_to = sel_start
-
-##            dbg('sel_start, start:', sel_start, start)
-
-            if sel_start == sel_to:
-                keep = sel_start -1
-            else:
-                keep = sel_start
-            newfield = value[start:keep] + value[sel_to:end]
-
-            # handle sign char moving from outside field into the field:
-            move_sign_into_field = False
-            if not field._padZero and self._signOk and self._isNeg and value[0] in ('-', '('):
-                signchar = value[0]
-                newfield = signchar + newfield
-                move_sign_into_field = True
-##            dbg('cut newfield: "%s"' % newfield)
-
-            # handle what should fill in from the left:
-            left = ""
-            for i in range(start, end - len(newfield)):
-                if field._padZero:
-                    left += '0'
-                elif( self._signOk and self._isNeg and i == 1
-                      and ((self._useParens and newfield.find('(') == -1)
-                           or (not self._useParens and newfield.find('-') == -1)) ):
-                    left += ' '
-                else:
-                    left += self._template[i]   # this can produce strange results in combination with default values...
-            newfield = left + newfield
-##            dbg('filled newfield: "%s"' % newfield)
-
-            newstr = value[:start] + newfield + value[end:]
-
-            # (handle sign located in "mask position" in front of field prior to delete)
-            if move_sign_into_field:
-                newstr = ' ' + newstr[1:]
-            pos = sel_to
-        else:
-            # handle erasure of (left) sign, moving selection accordingly...
-            if self._signOk and sel_start == 0:
-                newstr = value = ' ' + value[1:]
-                sel_start += 1
-
-            if field._allowInsert and sel_start >= start:
-                # selection (if any) falls within current insert-capable field:
-                select_len = sel_to - sel_start
-                # determine where cursor should end up:
-                if key == wx.WXK_BACK:
-                    if select_len == 0:
-                        newpos = sel_start -1
-                    else:
-                        newpos = sel_start
-                    erase_to = sel_to
-                else:
-                    newpos = sel_start
-                    if sel_to == sel_start:
-                        erase_to = sel_to + 1
-                    else:
-                        erase_to = sel_to
-
-                if self._isTemplateChar(newpos) and select_len == 0:
-                    if self._signOk:
-                        if value[newpos] in ('(', '-'):
-                            newpos += 1     # don't move cusor
-                            newstr = ' ' + value[newpos:]
-                        elif value[newpos] == ')':
-                            # erase right sign, but don't move cursor; (matching left sign handled later)
-                            newstr = value[:newpos] + ' '
-                        else:
-                            # no deletion; just move cursor
-                            newstr = value
-                    else:
-                        # no deletion; just move cursor
-                        newstr = value
-                else:
-                    if erase_to > end: erase_to = end
-                    erase_len = erase_to - newpos
-
-                    left = value[start:newpos]
-##                    dbg("retained ='%s'" % value[erase_to:end], 'sel_to:', sel_to, "fill: '%s'" % self._template[end - erase_len:end])
-                    right = value[erase_to:end] + self._template[end-erase_len:end]
-                    pos_adjust = 0
-                    if field._alignRight:
-                        rstripped = right.rstrip()
-                        if rstripped != right:
-                            pos_adjust = len(right) - len(rstripped)
-                        right = rstripped
-
-                    if not field._insertRight and value[-1] == ')' and end == self._masklength - 1:
-                        # need to shift ) into the field:
-                        right = right[:-1] + ')'
-                        value = value[:-1] + ' '
-
-                    newfield = left+right
-                    if pos_adjust:
-                        newfield = newfield.rjust(end-start)
-                        newpos += pos_adjust
-##                    dbg("left='%s', right ='%s', newfield='%s'" %(left, right, newfield))
-                    newstr = value[:start] + newfield + value[end:]
-
-                pos = newpos
-
-            else:
-                if sel_start == sel_to:
-##                    dbg("current sel_start, sel_to:", sel_start, sel_to)
-                    if key == wx.WXK_BACK:
-                        sel_start, sel_to = sel_to-1, sel_to-1
-##                        dbg("new sel_start, sel_to:", sel_start, sel_to)
-
-                    if field._padZero and not value[start:sel_to].replace('0', '').replace(' ','').replace(field._fillChar, ''):
-                        # preceding chars (if any) are zeros, blanks or fillchar; new char should be 0:
-                        newchar = '0'
-                    else:
-                        newchar = self._template[sel_to] ## get an original template character to "clear" the current char
-##                    dbg('value = "%s"' % value, 'value[%d] = "%s"' %(sel_start, value[sel_start]))
-
-                    if self._isTemplateChar(sel_to):
-                        if sel_to == 0 and self._signOk and value[sel_to] == '-':   # erasing "template" sign char
-                            newstr = ' ' + value[1:]
-                            sel_to += 1
-                        elif self._signOk and self._useParens and (value[sel_to] == ')' or value[sel_to] == '('):
-                            # allow "change sign" by removing both parens:
-                            newstr = value[:self._signpos] + ' ' + value[self._signpos+1:-1] + ' '
-                        else:
-                            newstr = value
-                        newpos = sel_to
-                    else:
-                        if field._insertRight and sel_start == sel_to:
-                            # force non-insert-right behavior, by selecting char to be replaced:
-                            sel_to += 1
-                        newstr, ignore = self._insertKey(newchar, sel_start, sel_start, sel_to, value)
-
-                else:
-                    # selection made
-                    newstr = self._eraseSelection(value, sel_start, sel_to)
-
-                pos = sel_start  # put cursor back at beginning of selection
-
-        if self._signOk and self._useParens:
-            # account for resultant unbalanced parentheses:
-            left_signpos = newstr.find('(')
-            right_signpos = newstr.find(')')
-
-            if left_signpos == -1 and right_signpos != -1:
-                # erased left-sign marker; get rid of right sign marker:
-                newstr = newstr[:right_signpos] + ' ' + newstr[right_signpos+1:]
-
-            elif left_signpos != -1 and right_signpos == -1:
-                # erased right-sign marker; get rid of left-sign marker:
-                newstr = newstr[:left_signpos] + ' ' + newstr[left_signpos+1:]
-
-##        dbg("oldstr:'%s'" % value, 'oldpos:', oldstart)
-##        dbg("newstr:'%s'" % newstr, 'pos:', pos)
-
-        # if erasure results in an invalid field, disallow it:
-##        dbg('field._validRequired?', field._validRequired)
-##        dbg('field.IsValid("%s")?' % newstr[start:end], field.IsValid(newstr[start:end]))
-        if field._validRequired and not field.IsValid(newstr[start:end]):
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-##            dbg(indent=0)
-            return False
-
-        # if erasure results in an invalid value, disallow it:
-        if self._ctrl_constraints._validRequired and not self.IsValid(newstr):
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-##            dbg(indent=0)
-            return False
-
-        if just_return_value:
-##            dbg(indent=0)
-            return newstr
-
-        # else...
-##        dbg('setting value (later) to', newstr)
-        wx.CallAfter(self._SetValue, newstr)
-##        dbg('setting insertion point (later) to', pos)
-        wx.CallAfter(self._SetInsertionPoint, pos)
-##        dbg(indent=0)
-        if newstr != value:
-            self.modified = True
-        return False
-
-
-    def _OnEnd(self,event):
-        """ Handles End keypress in control. Should return False to skip other processing. """
-##        dbg("MaskedEditMixin::_OnEnd", indent=1)
-        pos = self._adjustPos(self._GetInsertionPoint(), event.GetKeyCode())
-        if not event.ControlDown():
-            end = self._masklength  # go to end of control
-            if self._signOk and self._useParens:
-                end = end - 1       # account for reserved char at end
-        else:
-            end_of_input = self._goEnd(getPosOnly=True)
-            sel_start, sel_to = self._GetSelection()
-            if sel_to < pos: sel_to = pos
-            field = self._FindField(sel_to)
-            field_end = self._FindField(end_of_input)
-
-            # pick different end point if either:
-            # - cursor not in same field
-            # - or at or past last input already
-            # - or current selection = end of current field:
-####            dbg('field != field_end?', field != field_end)
-####            dbg('sel_to >= end_of_input?', sel_to >= end_of_input)
-            if field != field_end or sel_to >= end_of_input:
-                edit_start, edit_end = field._extent
-####                dbg('edit_end:', edit_end)
-####                dbg('sel_to:', sel_to)
-####                dbg('sel_to == edit_end?', sel_to == edit_end)
-####                dbg('field._index < self._field_indices[-1]?', field._index < self._field_indices[-1])
-
-                if sel_to == edit_end and field._index < self._field_indices[-1]:
-                    edit_start, edit_end = self._FindFieldExtent(self._findNextEntry(edit_end))  # go to end of next field:
-                    end = edit_end
-##                    dbg('end moved to', end)
-
-                elif sel_to == edit_end and field._index == self._field_indices[-1]:
-                    # already at edit end of last field; select to end of control:
-                    end = self._masklength
-##                    dbg('end moved to', end)
-                else:
-                    end = edit_end  # select to end of current field
-##                    dbg('end moved to ', end)
-            else:
-                # select to current end of input
-                end = end_of_input
-
-
-####        dbg('pos:', pos, 'end:', end)
-
-        if event.ShiftDown():
-            if not event.ControlDown():
-##                dbg("shift-end; select to end of control")
-                pass
-            else:
-##                dbg("shift-ctrl-end; select to end of non-whitespace")
-                pass
-            wx.CallAfter(self._SetInsertionPoint, pos)
-            wx.CallAfter(self._SetSelection, pos, end)
-        else:
-            if not event.ControlDown():
-##                dbg('go to end of control:')
-                pass
-            wx.CallAfter(self._SetInsertionPoint, end)
-            wx.CallAfter(self._SetSelection, end, end)
-
-##        dbg(indent=0)
-        return False
-
-
-    def _OnReturn(self, event):
-         """
-         Swallows the return, issues a Navigate event instead, since
-         masked controls are "single line" by defn.
-         """
-##         dbg('MaskedEditMixin::OnReturn')
-         self.Navigate(True)
-         return False
-
-
-    def _OnHome(self,event):
-        """ Handles Home keypress in control. Should return False to skip other processing."""
-##        dbg("MaskedEditMixin::_OnHome", indent=1)
-        pos = self._adjustPos(self._GetInsertionPoint(), event.GetKeyCode())
-        sel_start, sel_to = self._GetSelection()
-
-        # There are 5 cases here:
-
-        # 1) shift: select from start of control to end of current
-        #    selection.
-        if event.ShiftDown() and not event.ControlDown():
-##            dbg("shift-home; select to start of control")
-            start = 0
-            end = sel_start
-
-        # 2) no shift, no control: move cursor to beginning of control.
-        elif not event.ControlDown():
-##            dbg("home; move to start of control")
-            start = 0
-            end = 0
-
-        # 3) No shift, control: move cursor back to beginning of field; if
-        #    there already, go to beginning of previous field.
-        # 4) shift, control, start of selection not at beginning of control:
-        #    move sel_start back to start of field; if already there, go to
-        #    start of previous field.
-        elif( event.ControlDown()
-              and (not event.ShiftDown()
-                   or (event.ShiftDown() and sel_start > 0) ) ):
-            if len(self._field_indices) > 1:
-                field = self._FindField(sel_start)
-                start, ignore = field._extent
-                if sel_start == start and field._index != self._field_indices[0]:  # go to start of previous field:
-                    start, ignore = self._FindFieldExtent(sel_start-1)
-                elif sel_start == start:
-                    start = 0   # go to literal beginning if edit start
-                                # not at that point
-                end_of_field = True
-
-            else:
-                start = 0
-
-            if not event.ShiftDown():
-##                dbg("ctrl-home; move to beginning of field")
-                end = start
-            else:
-##                dbg("shift-ctrl-home; select to beginning of field")
-                end = sel_to
-
-        else:
-        # 5) shift, control, start of selection at beginning of control:
-        #    unselect by moving sel_to backward to beginning of current field;
-        #    if already there, move to start of previous field.
-            start = sel_start
-            if len(self._field_indices) > 1:
-                # find end of previous field:
-                field = self._FindField(sel_to)
-                if sel_to > start and field._index != self._field_indices[0]:
-                    ignore, end = self._FindFieldExtent(field._extent[0]-1)
-                else:
-                    end = start
-                end_of_field = True
-            else:
-                end = start
-                end_of_field = False
-##            dbg("shift-ctrl-home; unselect to beginning of field")
-
-##        dbg('queuing new sel_start, sel_to:', (start, end))
-        wx.CallAfter(self._SetInsertionPoint, start)
-        wx.CallAfter(self._SetSelection, start, end)
-##        dbg(indent=0)
-        return False
-
-
-    def _OnChangeField(self, event):
-        """
-        Primarily handles TAB events, but can be used for any key that
-        designer wants to change fields within a masked edit control.
-        """
-##        dbg('MaskedEditMixin::_OnChangeField', indent = 1)
-        # determine end of current field:
-        pos = self._GetInsertionPoint()
-##        dbg('current pos:', pos)
-        sel_start, sel_to = self._GetSelection()
-
-        if self._masklength < 0:   # no fields; process tab normally
-            self._AdjustField(pos)
-            if event.GetKeyCode() == wx.WXK_TAB:
-##                dbg('tab to next ctrl')
-                # As of 2.5.2, you don't call event.Skip() to do
-                # this, but instead force explicit navigation, if
-                # wx.TE_PROCESS_TAB is used (like in the masked edits)
-                self.Navigate(True)
-            #else: do nothing
-##            dbg(indent=0)
-            return False
-
-        field = self._FindField(sel_to)
-        index = field._index
-        field_start, field_end = field._extent
-        slice = self._GetValue()[field_start:field_end]
-
-##        dbg('field._stopFieldChangeIfInvalid?', field._stopFieldChangeIfInvalid)
-##        dbg('field.IsValid(slice)?', field.IsValid(slice))
-        
-        if field._stopFieldChangeIfInvalid and not field.IsValid(slice):
-##            dbg('field invalid; field change disallowed')
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-##            dbg(indent=0)
-            return False
-
-
-        if event.ShiftDown():
-
-            # "Go backward"
-
-            # NOTE: doesn't yet work with SHIFT-tab under wx; the control
-            # never sees this event! (But I've coded for it should it ever work,
-            # and it *does* work for '.' in IpAddrCtrl.)
-
-            if pos < field_start:
-##                dbg('cursor before 1st field; cannot change to a previous field')
-                if not wx.Validator_IsSilent():
-                    wx.Bell()
-##                dbg(indent=0)
-                return False
-
-            if event.ControlDown():
-##                dbg('queuing select to beginning of field:', field_start, pos)
-                wx.CallAfter(self._SetInsertionPoint, field_start)
-                wx.CallAfter(self._SetSelection, field_start, pos)
-##                dbg(indent=0)
-                return False
-
-            elif index == 0:
-                  # We're already in the 1st field; process shift-tab normally:
-                self._AdjustField(pos)
-                if event.GetKeyCode() == wx.WXK_TAB:
-##                    dbg('tab to previous ctrl')
-                    # As of 2.5.2, you don't call event.Skip() to do
-                    # this, but instead force explicit navigation, if
-                    # wx.TE_PROCESS_TAB is used (like in the masked edits)
-                    self.Navigate(False)
-                else:
-##                    dbg('position at beginning')
-                    wx.CallAfter(self._SetInsertionPoint, field_start)
-##                dbg(indent=0)
-                return False
-            else:
-                # find beginning of previous field:
-                begin_prev = self._FindField(field_start-1)._extent[0]
-                self._AdjustField(pos)
-##                dbg('repositioning to', begin_prev)
-                wx.CallAfter(self._SetInsertionPoint, begin_prev)
-                if self._FindField(begin_prev)._selectOnFieldEntry:
-                    edit_start, edit_end = self._FindFieldExtent(begin_prev)
-##                    dbg('queuing selection to (%d, %d)' % (edit_start, edit_end))
-                    wx.CallAfter(self._SetInsertionPoint, edit_start)
-                    wx.CallAfter(self._SetSelection, edit_start, edit_end)
-##                dbg(indent=0)
-                return False
-
-        else:
-            # "Go forward"
-            if event.ControlDown():
-##                dbg('queuing select to end of field:', pos, field_end)
-                wx.CallAfter(self._SetInsertionPoint, pos)
-                wx.CallAfter(self._SetSelection, pos, field_end)
-##                dbg(indent=0)
-                return False
-            else:
-                if pos < field_start:
-##                    dbg('cursor before 1st field; go to start of field')
-                    wx.CallAfter(self._SetInsertionPoint, field_start)
-                    if field._selectOnFieldEntry:
-                        wx.CallAfter(self._SetSelection, field_start, field_end)
-                    else:
-                        wx.CallAfter(self._SetSelection, field_start, field_start)
-                    return False
-                # else...
-##                dbg('end of current field:', field_end)
-##                dbg('go to next field')
-                if field_end == self._fields[self._field_indices[-1]]._extent[1]:
-                    self._AdjustField(pos)
-                    if event.GetKeyCode() == wx.WXK_TAB:
-##                        dbg('tab to next ctrl')
-                        # As of 2.5.2, you don't call event.Skip() to do
-                        # this, but instead force explicit navigation, if
-                        # wx.TE_PROCESS_TAB is used (like in the masked edits)
-                        self.Navigate(True)
-                    else:
-##                        dbg('position at end')
-                        wx.CallAfter(self._SetInsertionPoint, field_end)
-##                    dbg(indent=0)
-                    return False
-                else:
-                    # we have to find the start of the next field
-                    next_pos = self._findNextEntry(field_end)
-                    if next_pos == field_end:
-##                        dbg('already in last field')
-                        self._AdjustField(pos)
-                        if event.GetKeyCode() == wx.WXK_TAB:
-##                            dbg('tab to next ctrl')
-                            # As of 2.5.2, you don't call event.Skip() to do
-                            # this, but instead force explicit navigation, if
-                            # wx.TE_PROCESS_TAB is used (like in the masked edits)
-                            self.Navigate(True)
-                        #else: do nothing
-##                        dbg(indent=0)
-                        return False
-                    else:
-                        self._AdjustField( pos )
-
-                        # move cursor to appropriate point in the next field and select as necessary:
-                        field = self._FindField(next_pos)
-                        edit_start, edit_end = field._extent
-                        if field._selectOnFieldEntry:
-##                            dbg('move to ', next_pos)
-                            wx.CallAfter(self._SetInsertionPoint, next_pos)
-                            edit_start, edit_end = self._FindFieldExtent(next_pos)
-##                            dbg('queuing select', edit_start, edit_end)
-                            wx.CallAfter(self._SetSelection, edit_start, edit_end)
-                        else:
-                            if field._insertRight:
-                                next_pos = field._extent[1]
-##                            dbg('move to ', next_pos)
-                            wx.CallAfter(self._SetInsertionPoint, next_pos)
-##                        dbg(indent=0)
-                        return False
-##                dbg(indent=0)
-
-
-    def _OnDecimalPoint(self, event):
-##        dbg('MaskedEditMixin::_OnDecimalPoint', indent=1)
-        field = self._FindField(self._GetInsertionPoint())
-        start, end = field._extent
-        slice = self._GetValue()[start:end]
-        
-        if field._stopFieldChangeIfInvalid and not field.IsValid(slice):
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-            return False
-
-        pos = self._adjustPos(self._GetInsertionPoint(), event.GetKeyCode())
-
-        if self._isFloat:       ## handle float value, move to decimal place
-##            dbg('key == Decimal tab; decimal pos:', self._decimalpos)
-            value = self._GetValue()
-            if pos < self._decimalpos:
-                clipped_text = value[0:pos] + self._decimalChar + value[self._decimalpos+1:]
-##                dbg('value: "%s"' % self._GetValue(), "clipped_text:'%s'" % clipped_text)
-                newstr = self._adjustFloat(clipped_text)
-            else:
-                newstr = self._adjustFloat(value)
-            wx.CallAfter(self._SetValue, newstr)
-            fraction = self._fields[1]
-            start, end = fraction._extent
-            wx.CallAfter(self._SetInsertionPoint, start)
-            if fraction._selectOnFieldEntry:
-##                dbg('queuing selection after decimal point to:', (start, end))
-                wx.CallAfter(self._SetSelection, start, end)
-            else:
-                wx.CallAfter(self._SetSelection, start, start)
-            keep_processing = False
-
-        if self._isInt:      ## handle integer value, truncate from current position
-##            dbg('key == Integer decimal event')
-            value = self._GetValue()
-            clipped_text = value[0:pos]
-##            dbg('value: "%s"' % self._GetValue(), "clipped_text:'%s'" % clipped_text)
-            newstr = self._adjustInt(clipped_text)
-##            dbg('newstr: "%s"' % newstr)
-            wx.CallAfter(self._SetValue, newstr)
-            newpos = len(newstr.rstrip())
-            if newstr.find(')') != -1:
-                newpos -= 1     # (don't move past right paren)
-            wx.CallAfter(self._SetInsertionPoint, newpos)
-            wx.CallAfter(self._SetSelection, newpos, newpos)
-            keep_processing = False
-##        dbg(indent=0)
-
-
-    def _OnChangeSign(self, event):
-##        dbg('MaskedEditMixin::_OnChangeSign', indent=1)
-        key = event.GetKeyCode()
-        pos = self._adjustPos(self._GetInsertionPoint(), key)
-        value = self._eraseSelection()
-        integer = self._fields[0]
-        start, end = integer._extent
-        sel_start, sel_to = self._GetSelection()
-
-####        dbg('adjusted pos:', pos)
-        if chr(key) in ('-','+','(', ')') or (chr(key) == " " and pos == self._signpos):
-            cursign = self._isNeg
-##            dbg('cursign:', cursign)
-            if chr(key) in ('-','(', ')'):
-                if sel_start <= self._signpos:
-                    self._isNeg = True
-                else:
-                    self._isNeg = (not self._isNeg)   ## flip value
-            else:
-                self._isNeg = False
-##            dbg('isNeg?', self._isNeg)
-
-            text, self._signpos, self._right_signpos = self._getSignedValue(candidate=value)
-##            dbg('text:"%s"' % text, 'signpos:', self._signpos, 'right_signpos:', self._right_signpos)
-            if text is None:
-                text = value
-
-            if self._isNeg and self._signpos is not None and self._signpos != -1:
-                if self._useParens and self._right_signpos is not None:
-                    text = text[:self._signpos] + '(' + text[self._signpos+1:self._right_signpos] + ')' + text[self._right_signpos+1:]
-                else:
-                    text = text[:self._signpos] + '-' + text[self._signpos+1:]
-            else:
-####                dbg('self._isNeg?', self._isNeg, 'self.IsValid(%s)' % text, self.IsValid(text))
-                if self._useParens:
-                    text = text[:self._signpos] + ' ' + text[self._signpos+1:self._right_signpos] + ' ' + text[self._right_signpos+1:]
-                else:
-                    text = text[:self._signpos] + ' ' + text[self._signpos+1:]
-##                dbg('clearing self._isNeg')
-                self._isNeg = False
-
-            wx.CallAfter(self._SetValue, text)
-            wx.CallAfter(self._applyFormatting)
-##            dbg('pos:', pos, 'signpos:', self._signpos)
-            if pos == self._signpos or integer.IsEmpty(text[start:end]):
-                wx.CallAfter(self._SetInsertionPoint, self._signpos+1)
-            else:
-                wx.CallAfter(self._SetInsertionPoint, pos)
-
-            keep_processing = False
-        else:
-            keep_processing = True
-##        dbg(indent=0)
-        return keep_processing
-
-
-    def _OnGroupChar(self, event):
-        """
-        This handler is only registered if the mask is a numeric mask.
-        It allows the insertion of ',' or '.' if appropriate.
-        """
-##        dbg('MaskedEditMixin::_OnGroupChar', indent=1)
-        keep_processing = True
-        pos = self._adjustPos(self._GetInsertionPoint(), event.GetKeyCode())
-        sel_start, sel_to = self._GetSelection()
-        groupchar = self._fields[0]._groupChar
-        if not self._isCharAllowed(groupchar, pos, checkRegex=True):
-            keep_processing = False
-            if not wx.Validator_IsSilent():
-                wx.Bell()
-
-        if keep_processing:
-            newstr, newpos = self._insertKey(groupchar, pos, sel_start, sel_to, self._GetValue() )
-##            dbg("str with '%s' inserted:" % groupchar, '"%s"' % newstr)
-            if self._ctrl_constraints._validRequired and not self.IsValid(newstr):
-                keep_processing = False
-                if not wx.Validator_IsSilent():
-                        wx.Bell()
-
-        if keep_processing:
-            wx.CallAfter(self._SetValue, newstr)
-            wx.CallAfter(self._SetInsertionPoint, newpos)
-        keep_processing = False
-##        dbg(indent=0)
-        return keep_processing
-
-
-    def _findNextEntry(self,pos, adjustInsert=True):
-        """ Find the insertion point for the next valid entry character position."""
-##        dbg('MaskedEditMixin::_findNextEntry', indent=1)
-        if self._isTemplateChar(pos) or pos in self._explicit_field_boundaries:   # if changing fields, pay attn to flag
-            adjustInsert = adjustInsert
-        else:                           # else within a field; flag not relevant
-            adjustInsert = False
-
-        while self._isTemplateChar(pos) and pos < self._masklength:
-            pos += 1
-
-        # if changing fields, and we've been told to adjust insert point,
-        # look at new field; if empty and right-insert field,
-        # adjust to right edge:
-        if adjustInsert and pos < self._masklength:
-            field = self._FindField(pos)
-            start, end = field._extent
-            slice = self._GetValue()[start:end]
-            if field._insertRight and field.IsEmpty(slice):
-                pos = end
-##        dbg('final pos:', pos, indent=0)
-        return pos
-
-
-    def _findNextTemplateChar(self, pos):
-        """ Find the position of the next non-editable character in the mask."""
-        while not self._isTemplateChar(pos) and pos < self._masklength:
-            pos += 1
-        return pos
-
-
-    def _OnAutoCompleteField(self, event):
-##        dbg('MaskedEditMixin::_OnAutoCompleteField', indent =1)
-        pos = self._GetInsertionPoint()
-        field = self._FindField(pos)
-        edit_start, edit_end, slice = self._FindFieldExtent(pos, getslice=True)
-
-        match_index = None
-        keycode = event.GetKeyCode()
-
-        if field._fillChar != ' ':
-            text = slice.replace(field._fillChar, '')
-        else:
-            text = slice
-        text = text.strip()
-        keep_processing = True  # (assume True to start)
-##        dbg('field._hasList?', field._hasList)
-        if field._hasList:
-##            dbg('choices:', field._choices)
-##            dbg('compareChoices:', field._compareChoices)
-            choices, choice_required = field._compareChoices, field._choiceRequired
-            if keycode in (wx.WXK_PRIOR, wx.WXK_UP, wx.WXK_NUMPAD_PRIOR, wx.WXK_NUMPAD_UP):
-                direction = -1
-            else:
-                direction = 1
-            match_index, partial_match = self._autoComplete(direction, choices, text, compareNoCase=field._compareNoCase, current_index = field._autoCompleteIndex)
-            if( match_index is None
-                and (keycode in self._autoCompleteKeycodes + [wx.WXK_PRIOR, wx.WXK_NEXT, wx.WXK_NUMPAD_PRIOR, wx.WXK_NUMPAD_NEXT]
-                     or (keycode in [wx.WXK_UP, wx.WXK_DOWN, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_DOWN] and event.ShiftDown() ) ) ):
-                # Select the 1st thing from the list:
-                match_index = 0
-
-            if( match_index is not None
-                and ( keycode in self._autoCompleteKeycodes + [wx.WXK_PRIOR, wx.WXK_NEXT, wx.WXK_NUMPAD_PRIOR, wx.WXK_NUMPAD_NEXT]
-                      or (keycode in [wx.WXK_UP, wx.WXK_DOWN, wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_DOWN] and event.ShiftDown())
-                      or (keycode in [wx.WXK_DOWN, wx.WXK_NUMPAD_DOWN] and partial_match) ) ):
-
-                # We're allowed to auto-complete:
-##                dbg('match found')
-                value = self._GetValue()
-                newvalue = value[:edit_start] + field._choices[match_index] + value[edit_end:]
-##                dbg('setting value to "%s"' % newvalue)
-                self._SetValue(newvalue)
-                self._SetInsertionPoint(min(edit_end, len(newvalue.rstrip())))
-                self._OnAutoSelect(field, match_index)
-                self._CheckValid()  # recolor as appopriate
-
-
-        if keycode in (wx.WXK_UP, wx.WXK_DOWN, wx.WXK_LEFT, wx.WXK_RIGHT, 
-                       wx.WXK_NUMPAD_UP, wx.WXK_NUMPAD_DOWN, wx.WXK_NUMPAD_LEFT, wx.WXK_NUMPAD_RIGHT):
-            # treat as left right arrow if unshifted, tab/shift tab if shifted.
-            if event.ShiftDown():
-                if keycode in (wx.WXK_DOWN, wx.WXK_RIGHT, wx.WXK_NUMPAD_DOWN, wx.WXK_NUMPAD_RIGHT):
-                    # remove "shifting" and treat as (forward) tab:
-                    event.m_shiftDown = False
-                keep_processing = self._OnChangeField(event)
-            else:
-                keep_processing = self._OnArrow(event)
-        # else some other key; keep processing the key
-
-##        dbg('keep processing?', keep_processing, indent=0)
-        return keep_processing
-
-
-    def _OnAutoSelect(self, field, match_index = None):
-        """
-        Function called if autoselect feature is enabled and entire control
-        is selected:
-        """
-##        dbg('MaskedEditMixin::OnAutoSelect', field._index)
-        if match_index is not None:
-            field._autoCompleteIndex = match_index
-
-
-    def _autoComplete(self, direction, choices, value, compareNoCase, current_index):
-        """
-        This function gets called in response to Auto-complete events.
-        It attempts to find a match to the specified value against the
-        list of choices; if exact match, the index of then next
-        appropriate value in the list, based on the given direction.
-        If not an exact match, it will return the index of the 1st value from
-        the choice list for which the partial value can be extended to match.
-        If no match found, it will return None.
-        The function returns a 2-tuple, with the 2nd element being a boolean
-        that indicates if partial match was necessary.
-        """
-##        dbg('autoComplete(direction=', direction, 'choices=',choices, 'value=',value,'compareNoCase?', compareNoCase, 'current_index:', current_index, indent=1)
-        if value is None:
-##            dbg('nothing to match against', indent=0)
-            return (None, False)
-
-        partial_match = False
-
-        if compareNoCase:
-            value = value.lower()
-
-        last_index = len(choices) - 1
-        if value in choices:
-##            dbg('"%s" in', choices)
-            if current_index is not None and choices[current_index] == value:
-                index = current_index
-            else:
-                index = choices.index(value)
-
-##            dbg('matched "%s" (%d)' % (choices[index], index))
-            if direction == -1:
-##                dbg('going to previous')
-                if index == 0: index = len(choices) - 1
-                else: index -= 1
-            else:
-                if index == len(choices) - 1: index = 0
-                else: index += 1
-##            dbg('change value to "%s" (%d)' % (choices[index], index))
-            match = index
-        else:
-            partial_match = True
-            value = value.strip()
-##            dbg('no match; try to auto-complete:')
-            match = None
-##            dbg('searching for "%s"' % value)
-            if current_index is None:
-                indices = range(len(choices))
-                if direction == -1:
-                    indices.reverse()
-            else:
-                if direction == 1:
-                    indices = range(current_index +1, len(choices)) + range(current_index+1)
-##                    dbg('range(current_index+1 (%d), len(choices) (%d)) + range(%d):' % (current_index+1, len(choices), current_index+1), indices)
-                else:
-                    indices = range(current_index-1, -1, -1) + range(len(choices)-1, current_index-1, -1)
-##                    dbg('range(current_index-1 (%d), -1) + range(len(choices)-1 (%d)), current_index-1 (%d):' % (current_index-1, len(choices)-1, current_index-1), indices)
-####            dbg('indices:', indices)
-            for index in indices:
-                choice = choices[index]
-                if choice.find(value, 0) == 0:
-##                    dbg('match found:', choice)
-                    match = index
-                    break
-                else:
-##                    dbg('choice: "%s" - no match' % choice)
-                    pass
-            if match is not None:
-##                dbg('matched', match)
-                pass
-            else:
-##                dbg('no match found')
-                pass
-##        dbg(indent=0)
-        return (match, partial_match)
-
-
-    def _AdjustField(self, pos):
-        """
-        This function gets called by default whenever the cursor leaves a field.
-        The pos argument given is the char position before leaving that field.
-        By default, floating point, integer and date values are adjusted to be
-        legal in this function.  Derived classes may override this function
-        to modify the value of the control in a different way when changing fields.
-
-        NOTE: these change the value immediately, and restore the cursor to
-        the passed location, so that any subsequent code can then move it
-        based on the operation being performed.
-        """
-        newvalue = value = self._GetValue()
-        field = self._FindField(pos)
-        start, end, slice = self._FindFieldExtent(getslice=True)
-        newfield = field._AdjustField(slice)
-        newvalue = value[:start] + newfield + value[end:]
-
-        if self._isFloat and newvalue != self._template:
-            newvalue = self._adjustFloat(newvalue)
-
-        if self._ctrl_constraints._isInt and value != self._template:
-            newvalue = self._adjustInt(value)
-
-        if self._isDate and value != self._template:
-            newvalue = self._adjustDate(value, fixcentury=True)
-            if self._4digityear:
-                year2dig = self._dateExtent - 2
-                if pos == year2dig and value[year2dig] != newvalue[year2dig]:
-                    pos = pos+2
-
-        if newvalue != value:
-##            dbg('old value: "%s"\nnew value: "%s"' % (value, newvalue))
-            self._SetValue(newvalue)
-            self._SetInsertionPoint(pos)
-
-
-    def _adjustKey(self, pos, key):
-        """ Apply control formatting to the key (e.g. convert to upper etc). """
-        field = self._FindField(pos)
-        if field._forceupper and key in range(97,123):
-            key = ord( chr(key).upper())
-
-        if field._forcelower and key in range(97,123):
-            key = ord( chr(key).lower())
-
-        return key
-
-
-    def _adjustPos(self, pos, key):
-        """
-        Checks the current insertion point position and adjusts it if
-        necessary to skip over non-editable characters.
-        """
-##        dbg('_adjustPos', pos, key, indent=1)
-        sel_start, sel_to = self._GetSelection()
-        # If a numeric or decimal mask, and negatives allowed, reserve the
-        # first space for sign, and last one if using parens.
-        if( self._signOk
-            and ((pos == self._signpos and key in (ord('-'), ord('+'), ord(' ')) )
-                 or (self._useParens and pos == self._masklength -1))):
-##            dbg('adjusted pos:', pos, indent=0)
-            return pos
-
-        if key not in self._nav:
-            field = self._FindField(pos)
-
-##            dbg('field._insertRight?', field._insertRight)
-##            if self._signOk: dbg('self._signpos:', self._signpos)
-            if field._insertRight:              # if allow right-insert
-                start, end = field._extent
-                slice = self._GetValue()[start:end].strip()
-                field_len = end - start
-                if pos == end:                      # if cursor at right edge of field
-                    # if not filled or supposed to stay in field, keep current position
-####                    dbg('pos==end')
-####                    dbg('len (slice):', len(slice))
-####                    dbg('field_len?', field_len)
-####                    dbg('pos==end; len (slice) < field_len?', len(slice) < field_len)
-####                    dbg('not field._moveOnFieldFull?', not field._moveOnFieldFull)
-                    if( len(slice) == field_len and field._moveOnFieldFull
-                        and (not field._stopFieldChangeIfInvalid or
-                             field._stopFieldChangeIfInvalid and field.IsValid(slice))):
-                        # move cursor to next field:
-                        pos = self._findNextEntry(pos)
-                        self._SetInsertionPoint(pos)
-                        if pos < sel_to:
-                            self._SetSelection(pos, sel_to)     # restore selection
-                        else:
-                            self._SetSelection(pos, pos)        # remove selection
-                    else: # leave cursor alone
-                        pass
-                else:
-                    # if at start of control, move to right edge
-                    if (sel_to == sel_start
-                        and (self._isTemplateChar(pos) or (pos == start and len(slice)+ 1 < field_len))
-                        and pos != end):
-                        pos = end                   # move to right edge
-##                    elif sel_start <= start and sel_to == end:
-##                        # select to right edge of field - 1 (to replace char)
-##                        pos = end - 1
-##                        self._SetInsertionPoint(pos)
-##                        # restore selection
-##                        self._SetSelection(sel_start, pos)
-
-                    # if selected to beginning and signed, and not changing sign explicitly:
-                    elif self._signOk and sel_start == 0 and key not in (ord('-'), ord('+'), ord(' ')):
-                        # adjust to past reserved sign position:
-                        pos = self._fields[0]._extent[0]
-##                        dbg('adjusting field to ', pos)
-                        self._SetInsertionPoint(pos)
-                        # but keep original selection, to allow replacement of any sign: 
-                        self._SetSelection(0, sel_to)
-                    else:
-                        pass    # leave position/selection alone
-
-            # else make sure the user is not trying to type over a template character
-            # If they are, move them to the next valid entry position
-            elif self._isTemplateChar(pos):
-                if( (not field._moveOnFieldFull
-                     and (not self._signOk
-                          or (self._signOk and field._index == 0 and pos > 0) ) )
-                    
-                    or (field._stopFieldChangeIfInvalid
-                        and not field.IsValid(self._GetValue()[start:end]) ) ):
-                    
-                    # don't move to next field without explicit cursor movement
-                    pass
-                else:
-                    # find next valid position
-                    pos = self._findNextEntry(pos)
-                    self._SetInsertionPoint(pos)
-                    if pos < sel_to:    # restore selection
-                        self._SetSelection(pos, sel_to)
-                    else:
-                        self._SetSelection(pos, pos)
-##        dbg('adjusted pos:', pos, indent=0)
-        return pos
-
-
-    def _adjustFloat(self, candidate=None):
-        """
-        'Fixes' an floating point control. Collapses spaces, right-justifies, etc.
-        """
-##        dbg('MaskedEditMixin::_adjustFloat, candidate = "%s"' % candidate, indent=1)
-        lenInt,lenFraction  = [len(s) for s in self._mask.split('.')]  ## Get integer, fraction lengths
-
-        if candidate is None: value = self._GetValue()
-        else: value = candidate
-##        dbg('value = "%(value)s"' % locals(), 'len(value):', len(value))
-        intStr, fracStr = value.split(self._decimalChar)
-
-        intStr = self._fields[0]._AdjustField(intStr)
-##        dbg('adjusted intStr: "%s"' % intStr)
-        lenInt = len(intStr)
-        fracStr = fracStr + ('0'*(lenFraction-len(fracStr)))  # add trailing spaces to decimal
-
-##        dbg('intStr "%(intStr)s"' % locals())
-##        dbg('lenInt:', lenInt)
-
-        intStr = string.rjust( intStr[-lenInt:], lenInt)
-##        dbg('right-justifed intStr = "%(intStr)s"' % locals())
-        newvalue = intStr + self._decimalChar + fracStr
-
-        if self._signOk:
-            if len(newvalue) < self._masklength:
-                newvalue = ' ' + newvalue
-            signedvalue = self._getSignedValue(newvalue)[0]
-            if signedvalue is not None: newvalue = signedvalue
-
-        # Finally, align string with decimal position, left-padding with
-        # fillChar:
-        newdecpos = newvalue.find(self._decimalChar)
-        if newdecpos < self._decimalpos:
-            padlen = self._decimalpos - newdecpos
-            newvalue = string.join([' ' * padlen] + [newvalue] ,'')
-
-        if self._signOk and self._useParens:
-            if newvalue.find('(') != -1:
-                newvalue = newvalue[:-1] + ')'
-            else:
-                newvalue = newvalue[:-1] + ' '
-
-##        dbg('newvalue = "%s"' % newvalue)
-        if candidate is None:
-            wx.CallAfter(self._SetValue, newvalue)
-##        dbg(indent=0)
-        return newvalue
-
-
-    def _adjustInt(self, candidate=None):
-        """ 'Fixes' an integer control. Collapses spaces, right or left-justifies."""
-##        dbg("MaskedEditMixin::_adjustInt", candidate)
-        lenInt = self._masklength
-        if candidate is None: value = self._GetValue()
-        else: value = candidate
-
-        intStr = self._fields[0]._AdjustField(value)
-        intStr = intStr.strip() # drop extra spaces
-##        dbg('adjusted field: "%s"' % intStr)
-
-        if self._isNeg and intStr.find('-') == -1 and intStr.find('(') == -1:
-            if self._useParens:
-                intStr = '(' + intStr + ')'
-            else:
-                intStr = '-' + intStr
-        elif self._isNeg and intStr.find('-') != -1 and self._useParens:
-            intStr = intStr.replace('-', '(')
-
-        if( self._signOk and ((self._useParens and intStr.find('(') == -1)
-                                or (not self._useParens and intStr.find('-') == -1))):
-            intStr = ' ' + intStr
-            if self._useParens:
-                intStr += ' '   # space for right paren position
-
-        elif self._signOk and self._useParens and intStr.find('(') != -1 and intStr.find(')') == -1:
-            # ensure closing right paren:
-            intStr += ')'
-
-        if self._fields[0]._alignRight:     ## Only if right-alignment is enabled
-            intStr = intStr.rjust( lenInt )
-        else:
-            intStr = intStr.ljust( lenInt )
-
-        if candidate is None:
-            wx.CallAfter(self._SetValue, intStr )
-        return intStr
-
-
-    def _adjustDate(self, candidate=None, fixcentury=False, force4digit_year=False):
-        """
-        'Fixes' a date control, expanding the year if it can.
-        Applies various self-formatting options.
-        """
-##        dbg("MaskedEditMixin::_adjustDate", indent=1)
-        if candidate is None: text    = self._GetValue()
-        else: text = candidate
-##        dbg('text=', text)
-        if self._datestyle == "YMD":
-            year_field = 0
-        else:
-            year_field = 2
-
-##        dbg('getYear: "%s"' % _getYear(text, self._datestyle))
-        year    = string.replace( _getYear( text, self._datestyle),self._fields[year_field]._fillChar,"")  # drop extra fillChars
-        month   = _getMonth( text, self._datestyle)
-        day     = _getDay( text, self._datestyle)
-##        dbg('self._datestyle:', self._datestyle, 'year:', year, 'Month', month, 'day:', day)
-
-        yearVal = None
-        yearstart = self._dateExtent - 4
-        if( len(year) < 4
-            and (fixcentury
-                 or force4digit_year
-                 or (self._GetInsertionPoint() > yearstart+1 and text[yearstart+2] == ' ')
-                 or (self._GetInsertionPoint() > yearstart+2 and text[yearstart+3] == ' ') ) ):
-            ## user entered less than four digits and changing fields or past point where we could
-            ## enter another digit:
-            try:
-                yearVal = int(year)
-            except:
-##                dbg('bad year=', year)
-                year = text[yearstart:self._dateExtent]
-
-        if len(year) < 4 and yearVal:
-            if len(year) == 2:
-                # Fix year adjustment to be less "20th century" :-) and to adjust heuristic as the
-                # years pass...
-                now = wx.DateTime_Now()
-                century = (now.GetYear() /100) * 100        # "this century"
-                twodig_year = now.GetYear() - century       # "this year" (2 digits)
-                # if separation between today's 2-digit year and typed value > 50,
-                #      assume last century,
-                # else assume this century.
-                #
-                # Eg: if 2003 and yearVal == 30, => 2030
-                #     if 2055 and yearVal == 80, => 2080
-                #     if 2010 and yearVal == 96, => 1996
-                #
-                if abs(yearVal - twodig_year) > 50:
-                    yearVal = (century - 100) + yearVal
-                else:
-                    yearVal = century + yearVal
-                year = str( yearVal )
-            else:   # pad with 0's to make a 4-digit year
-                year = "%04d" % yearVal
-            if self._4digityear or force4digit_year:
-                text = _makeDate(year, month, day, self._datestyle, text) + text[self._dateExtent:]
-##        dbg('newdate: "%s"' % text, indent=0)
-        return text
-
-
-    def _goEnd(self, getPosOnly=False):
-        """ Moves the insertion point to the end of user-entry """
-##        dbg("MaskedEditMixin::_goEnd; getPosOnly:", getPosOnly, indent=1)
-        text = self._GetValue()
-####        dbg('text: "%s"' % text)
-        i = 0
-        if len(text.rstrip()):
-            for i in range( min( self._masklength-1, len(text.rstrip())), -1, -1):
-####                dbg('i:', i, 'self._isMaskChar(%d)' % i, self._isMaskChar(i))
-                if self._isMaskChar(i):
-                    char = text[i]
-####                    dbg("text[%d]: '%s'" % (i, char))
-                    if char != ' ':
-                        i += 1
-                        break
-
-        if i == 0:
-            pos = self._goHome(getPosOnly=True)
-        else:
-            pos = min(i,self._masklength)
-
-        field = self._FindField(pos)
-        start, end = field._extent
-        if field._insertRight and pos < end:
-            pos = end
-##        dbg('next pos:', pos)
-##        dbg(indent=0)
-        if getPosOnly:
-            return pos
-        else:
-            self._SetInsertionPoint(pos)
-
-
-    def _goHome(self, getPosOnly=False):
-        """ Moves the insertion point to the beginning of user-entry """
-##        dbg("MaskedEditMixin::_goHome; getPosOnly:", getPosOnly, indent=1)
-        text = self._GetValue()
-        for i in range(self._masklength):
-            if self._isMaskChar(i):
-                break
-        pos = max(i, 0)
-##        dbg(indent=0)
-        if getPosOnly:
-            return pos
-        else:
-            self._SetInsertionPoint(max(i,0))
-
-
-
-    def _getAllowedChars(self, pos):
-        """ Returns a string of all allowed user input characters for the provided
-            mask character plus control options
-        """
-        maskChar = self.maskdict[pos]
-        okchars = self.maskchardict[maskChar]    ## entry, get mask approved characters
-
-        # convert okchars to unicode if required; will force subsequent appendings to
-        # result in unicode strings
-        if 'unicode' in wx.PlatformInfo and type(okchars) != types.UnicodeType:
-            okchars = okchars.decode(self._defaultEncoding)
-
-        field = self._FindField(pos)
-        if okchars and field._okSpaces:          ## Allow spaces?
-            okchars += " "
-        if okchars and field._includeChars:      ## any additional included characters?
-            okchars += field._includeChars
-####        dbg('okchars[%d]:' % pos, okchars)
-        return okchars
-
-
-    def _isMaskChar(self, pos):
-        """ Returns True if the char at position pos is a special mask character (e.g. NCXaA#)
-        """
-        if pos < self._masklength:
-            return self._ismasked[pos]
-        else:
-            return False
-
-
-    def _isTemplateChar(self,Pos):
-        """ Returns True if the char at position pos is a template character (e.g. -not- NCXaA#)
-        """
-        if Pos < self._masklength:
-            return not self._isMaskChar(Pos)
-        else:
-            return False
-
-
-    def _isCharAllowed(self, char, pos, checkRegex=False, allowAutoSelect=True, ignoreInsertRight=False):
-        """ Returns True if character is allowed at the specific position, otherwise False."""
-##        dbg('_isCharAllowed', char, pos, checkRegex, indent=1)
-        field = self._FindField(pos)
-        right_insert = False
-
-        if self.controlInitialized:
-            sel_start, sel_to = self._GetSelection()
-        else:
-            sel_start, sel_to = pos, pos
-
-        if (field._insertRight or self._ctrl_constraints._insertRight) and not ignoreInsertRight:
-            start, end = field._extent
-            field_len = end - start
-            if self.controlInitialized:
-                value = self._GetValue()
-                fstr = value[start:end].strip()
-                if field._padZero:
-                    while fstr and fstr[0] == '0':
-                        fstr = fstr[1:]
-                input_len = len(fstr)
-                if self._signOk and '-' in fstr or '(' in fstr:
-                    input_len -= 1  # sign can move out of field, so don't consider it in length
-            else:
-                value = self._template
-                input_len = 0   # can't get the current "value", so use 0
-
-
-            # if entire field is selected or position is at end and field is not full,
-            # or if allowed to right-insert at any point in field and field is not full and cursor is not at a fillChar
-            # or the field is a singleton integer field and is currently 0 and we're at the end:
-            if( (sel_start, sel_to) == field._extent
-                or (pos == end and ((input_len < field_len)
-                                     or (field_len == 1
-                                         and input_len == field_len
-                                         and field._isInt
-                                         and value[end-1] == '0'
-                                         )
-                                    ) ) ):
-                pos = end - 1
-##                dbg('pos = end - 1 = ', pos, 'right_insert? 1')
-                right_insert = True
-            elif( field._allowInsert and sel_start == sel_to
-                  and (sel_to == end or (sel_to < self._masklength and value[sel_start] != field._fillChar))
-                  and input_len < field_len ):
-                pos = sel_to - 1    # where character will go
-##                dbg('pos = sel_to - 1 = ', pos, 'right_insert? 1')
-                right_insert = True
-            # else leave pos alone...
-            else:
-##                dbg('pos stays ', pos, 'right_insert? 0')
-                pass
-
-        if self._isTemplateChar( pos ):  ## if a template character, return empty
-##            dbg('%d is a template character; returning False' % pos, indent=0)
-            return False
-
-        if self._isMaskChar( pos ):
-            okChars  = self._getAllowedChars(pos)
-
-            if self._fields[0]._groupdigits and (self._isInt or (self._isFloat and pos < self._decimalpos)):
-                okChars += self._fields[0]._groupChar
-
-            if self._signOk:
-                if self._isInt or (self._isFloat and pos < self._decimalpos):
-                    okChars += '-'
-                    if self._useParens:
-                        okChars += '('
-                elif self._useParens and (self._isInt or (self._isFloat and pos > self._decimalpos)):
-                    okChars += ')'
-
-####            dbg('%s in %s?' % (char, okChars), char in okChars)
-            approved = (self.maskdict[pos] == '*' or char in okChars)
-
-            if approved and checkRegex:
-##                dbg("checking appropriate regex's")
-                value = self._eraseSelection(self._GetValue())
-                if right_insert:
-                    # move the position to the right side of the insertion:
-                    at = pos+1
-                else:
-                    at = pos
-                if allowAutoSelect:
-                    newvalue, ignore, ignore, ignore, ignore = self._insertKey(char, at, sel_start, sel_to, value, allowAutoSelect=True)
-                else:
-                    newvalue, ignore = self._insertKey(char, at, sel_start, sel_to, value)
-##                dbg('newvalue: "%s"' % newvalue)
-
-                fields = [self._FindField(pos)] + [self._ctrl_constraints]
-                for field in fields:    # includes fields[-1] == "ctrl_constraints"
-                    if field._regexMask and field._filter:
-##                        dbg('checking vs. regex')
-                        start, end = field._extent
-                        slice = newvalue[start:end]
-                        approved = (re.match( field._filter, slice) is not None)
-##                        dbg('approved?', approved)
-                    if not approved: break
-##            dbg(indent=0)
-            return approved
-        else:
-##            dbg('%d is a !???! character; returning False', indent=0)
-            return False
-
-
-    def _applyFormatting(self):
-        """ Apply formatting depending on the control's state.
-            Need to find a way to call this whenever the value changes, in case the control's
-            value has been changed or set programatically.
-        """
-##        dbg(suspend=1)
-##        dbg('MaskedEditMixin::_applyFormatting', indent=1)
-
-        # Handle negative numbers
-        if self._signOk:
-            text, signpos, right_signpos = self._getSignedValue()
-##            dbg('text: "%s", signpos:' % text, signpos)
-            if text and signpos != self._signpos:
-                self._signpos = signpos
-            if not text or text[signpos] not in ('-','('):
-                self._isNeg = False
-##                dbg('no valid sign found; new sign:', self._isNeg)
-            elif text and self._valid and not self._isNeg and text[signpos] in ('-', '('):
-##                dbg('setting _isNeg to True')
-                self._isNeg = True
-##            dbg('self._isNeg:', self._isNeg)
-
-        if self._signOk and self._isNeg:
-            fc = self._signedForegroundColour
-        else:
-            fc = self._foregroundColour
-
-        if hasattr(fc, '_name'):
-            c =fc._name
-        else:
-            c = fc
-##        dbg('setting foreground to', c)
-        self.SetForegroundColour(fc)
-
-        if self._valid:
-##            dbg('valid')
-            if self.IsEmpty():
-                bc = self._emptyBackgroundColour
-            else:
-                bc = self._validBackgroundColour
-        else:
-##            dbg('invalid')
-            bc = self._invalidBackgroundColour
-        if hasattr(bc, '_name'):
-            c =bc._name
-        else:
-            c = bc
-##        dbg('setting background to', c)
-        self.SetBackgroundColour(bc)
-        self._Refresh()
-##        dbg(indent=0, suspend=0)
-
-
-    def _getAbsValue(self, candidate=None):
-        """ Return an unsigned value (i.e. strip the '-' prefix if any), and sign position(s).
-        """
-##        dbg('MaskedEditMixin::_getAbsValue; candidate="%s"' % candidate, indent=1)
-        if candidate is None: text = self._GetValue()
-        else: text = candidate
-        right_signpos = text.find(')')
-
-        if self._isInt:
-            if self._ctrl_constraints._alignRight and self._fields[0]._fillChar == ' ':
-                signpos = text.find('-')
-                if signpos == -1:
-##                    dbg('no - found; searching for (')
-                    signpos = text.find('(')
-                elif signpos != -1:
-##                    dbg('- found at', signpos)
-                    pass
-
-                if signpos == -1:
-##                    dbg('signpos still -1')
-##                    dbg('len(%s) (%d) < len(%s) (%d)?' % (text, len(text), self._mask, self._masklength), len(text) < self._masklength)
-                    if len(text) < self._masklength:
-                        text = ' ' + text
-                    if len(text) < self._masklength:
-                        text += ' '
-                    if len(text) > self._masklength and text[-1] in (')', ' '):
-                        text = text[:-1]
-                    else:
-##                        dbg('len(%s) (%d), len(%s) (%d)' % (text, len(text), self._mask, self._masklength))
-##                        dbg('len(%s) - (len(%s) + 1):' % (text, text.lstrip()) , len(text) - (len(text.lstrip()) + 1))
-                        signpos = len(text) - (len(text.lstrip()) + 1)
-
-                        if self._useParens and not text.strip():
-                            signpos -= 1    # empty value; use penultimate space
-##                dbg('signpos:', signpos)
-                if signpos >= 0:
-                    text = text[:signpos] + ' ' + text[signpos+1:]
-
-            else:
-                if self._signOk:
-                    signpos = 0
-                    text = self._template[0] + text[1:]
-                else:
-                    signpos = -1
-
-            if right_signpos != -1:
-                if self._signOk:
-                    text = text[:right_signpos] + ' ' + text[right_signpos+1:]
-                elif len(text) > self._masklength:
-                    text = text[:right_signpos] + text[right_signpos+1:]
-                    right_signpos = -1
-
-
-            elif self._useParens and self._signOk:
-                # figure out where it ought to go:
-                right_signpos = self._masklength - 1     # initial guess
-                if not self._ctrl_constraints._alignRight:
-##                    dbg('not right-aligned')
-                    if len(text.strip()) == 0:
-                        right_signpos = signpos + 1
-                    elif len(text.strip()) < self._masklength:
-                        right_signpos = len(text.rstrip())
-##                dbg('right_signpos:', right_signpos)
-
-            groupchar = self._fields[0]._groupChar
-            try:
-                value = long(text.replace(groupchar,'').replace('(','-').replace(')','').replace(' ', ''))
-            except:
-##                dbg('invalid number', indent=0)
-                return None, signpos, right_signpos
-
-        else:   # float value
-            try:
-                groupchar = self._fields[0]._groupChar
-                value = float(text.replace(groupchar,'').replace(self._decimalChar, '.').replace('(', '-').replace(')','').replace(' ', ''))
-##                dbg('value:', value)
-            except:
-                value = None
-
-            if value < 0 and value is not None:
-                signpos = text.find('-')
-                if signpos == -1:
-                    signpos = text.find('(')
-
-                text = text[:signpos] + self._template[signpos] + text[signpos+1:]
-            else:
-                # look forwards up to the decimal point for the 1st non-digit
-##                dbg('decimal pos:', self._decimalpos)
-##                dbg('text: "%s"' % text)
-                if self._signOk:
-                    signpos = self._decimalpos - (len(text[:self._decimalpos].lstrip()) + 1)
-                    # prevent checking for empty string - Tomo - Wed 14 Jan 2004 03:19:09 PM CET
-                    if len(text) >= signpos+1 and  text[signpos+1] in ('-','('):
-                        signpos += 1
-                else:
-                    signpos = -1
-##                dbg('signpos:', signpos)
-
-            if self._useParens:
-                if self._signOk:
-                    right_signpos = self._masklength - 1
-                    text = text[:right_signpos] + ' '
-                    if text[signpos] == '(':
-                        text = text[:signpos] + ' ' + text[signpos+1:]
-                else:
-                    right_signpos = text.find(')')
-                    if right_signpos != -1:
-                        text = text[:-1]
-                        right_signpos = -1
-
-            if value is None:
-##                dbg('invalid number')
-                text = None
-
-##        dbg('abstext = "%s"' % text, 'signpos:', signpos, 'right_signpos:', right_signpos)
-##        dbg(indent=0)
-        return text, signpos, right_signpos
-
-
-    def _getSignedValue(self, candidate=None):
-        """ Return a signed value by adding a "-" prefix if the value
-            is set to negative, or a space if positive.
-        """
-##        dbg('MaskedEditMixin::_getSignedValue; candidate="%s"' % candidate, indent=1)
-        if candidate is None: text = self._GetValue()
-        else: text = candidate
-
-
-        abstext, signpos, right_signpos = self._getAbsValue(text)
-        if self._signOk:
-            if abstext is None:
-##                dbg(indent=0)
-                return abstext, signpos, right_signpos
-
-            if self._isNeg or text[signpos] in ('-', '('):
-                if self._useParens:
-                    sign = '('
-                else:
-                    sign = '-'
-            else:
-                sign = ' '
-            if abstext[signpos] not in string.digits:
-                text = abstext[:signpos] + sign + abstext[signpos+1:]
-            else:
-                # this can happen if value passed is too big; sign assumed to be
-                # in position 0, but if already filled with a digit, prepend sign...
-                text = sign + abstext
-            if self._useParens and text.find('(') != -1:
-                text = text[:right_signpos] + ')' + text[right_signpos+1:]
-        else:
-            text = abstext
-##        dbg('signedtext = "%s"' % text, 'signpos:', signpos, 'right_signpos', right_signpos)
-##        dbg(indent=0)
-        return text, signpos, right_signpos
-
-
-    def GetPlainValue(self, candidate=None):
-        """ Returns control's value stripped of the template text.
-            plainvalue = MaskedEditMixin.GetPlainValue()
-        """
-##        dbg('MaskedEditMixin::GetPlainValue; candidate="%s"' % candidate, indent=1)
-
-        if candidate is None: text = self._GetValue()
-        else: text = candidate
-
-        if self.IsEmpty():
-##            dbg('returned ""', indent=0)
-            return ""
-        else:
-            plain = ""
-            for idx in range( min(len(self._template), len(text)) ):
-                if self._mask[idx] in maskchars:
-                    plain += text[idx]
-
-            if self._isFloat or self._isInt:
-##                dbg('plain so far: "%s"' % plain)
-                plain = plain.replace('(', '-').replace(')', ' ')
-##                dbg('plain after sign regularization: "%s"' % plain)
-
-                if self._signOk and self._isNeg and plain.count('-') == 0:
-                    # must be in reserved position; add to "plain value"
-                    plain = '-' + plain.strip()
-
-                if self._fields[0]._alignRight:
-                    lpad = plain.count(',')
-                    plain = ' ' * lpad + plain.replace(',','')
-                else:
-                    plain = plain.replace(',','')
-##                dbg('plain after pad and group:"%s"' % plain)
-
-##            dbg('returned "%s"' % plain.rstrip(), indent=0)
-            return plain.rstrip()
-
-
-    def IsEmpty(self, value=None):
-        """
-        Returns True if control is equal to an empty value.
-        (Empty means all editable positions in the template == fillChar.)
-        """
-        if value is None: value = self._GetValue()
-        if value == self._template and not self._defaultValue:
-####            dbg("IsEmpty? 1 (value == self._template and not self._defaultValue)")
-            return True     # (all mask chars == fillChar by defn)
-        elif value == self._template:
-            empty = True
-            for pos in range(len(self._template)):
-####                dbg('isMaskChar(%(pos)d)?' % locals(), self._isMaskChar(pos))
-####                dbg('value[%(pos)d] != self._fillChar?' %locals(), value[pos] != self._fillChar[pos])
-                if self._isMaskChar(pos) and value[pos] not in (' ', self._fillChar[pos]):
-                    empty = False
-####            dbg("IsEmpty? %(empty)d (do all mask chars == fillChar?)" % locals())
-            return empty
-        else:
-####            dbg("IsEmpty? 0 (value doesn't match template)")
-            return False
-
-
-    def IsDefault(self, value=None):
-        """
-        Returns True if the value specified (or the value of the control if not specified)
-        is equal to the default value.
-        """
-        if value is None: value = self._GetValue()
-        return value == self._template
-
-
-    def IsValid(self, value=None):
-        """ Indicates whether the value specified (or the current value of the control
-        if not specified) is considered valid."""
-####        dbg('MaskedEditMixin::IsValid("%s")' % value, indent=1)
-        if value is None: value = self._GetValue()
-        ret = self._CheckValid(value)
-####        dbg(indent=0)
-        return ret
-
-
-    def _eraseSelection(self, value=None, sel_start=None, sel_to=None):
-        """ Used to blank the selection when inserting a new character. """
-##        dbg("MaskedEditMixin::_eraseSelection", indent=1)
-        if value is None: value = self._GetValue()
-        if sel_start is None or sel_to is None:
-            sel_start, sel_to = self._GetSelection()                   ## check for a range of selected text
-##        dbg('value: "%s"' % value)
-##        dbg("current sel_start, sel_to:", sel_start, sel_to)
-
-        newvalue = list(value)
-        for i in range(sel_start, sel_to):
-            if self._signOk and newvalue[i] in ('-', '(', ')'):
-##                dbg('found sign (%s) at' % newvalue[i], i)
-
-                # balance parentheses:
-                if newvalue[i] == '(':
-                    right_signpos = value.find(')')
-                    if right_signpos != -1:
-                        newvalue[right_signpos] = ' '
-
-                elif newvalue[i] == ')':
-                    left_signpos = value.find('(')
-                    if left_signpos != -1:
-                        newvalue[left_signpos] = ' '
-
-                newvalue[i] = ' '
-
-            elif self._isMaskChar(i):
-                field = self._FindField(i)
-                if field._padZero:
-                    newvalue[i] = '0'
-                else:
-                    newvalue[i] = self._template[i]
-
-        value = string.join(newvalue,"")
-##        dbg('new value: "%s"' % value)
-##        dbg(indent=0)
-        return value
-
-
-    def _insertKey(self, char, pos, sel_start, sel_to, value, allowAutoSelect=False):
-        """ Handles replacement of the character at the current insertion point."""
-##        dbg('MaskedEditMixin::_insertKey', "\'" + char + "\'", pos, sel_start, sel_to, '"%s"' % value, indent=1)
-
-        text = self._eraseSelection(value)
-        field = self._FindField(pos)
-        start, end = field._extent
-        newtext = ""
-        newpos = pos
-
-        # if >= 2 chars selected in a right-insert field, do appropriate erase on field,
-        # then set selection to end, and do usual right insert.
-        if sel_start != sel_to and sel_to >= sel_start+2:
-            field = self._FindField(sel_start)
-            if( field._insertRight                          # if right-insert
-                and field._allowInsert                      # and allow insert at any point in field
-                and field == self._FindField(sel_to) ):     # and selection all in same field
-                text = self._OnErase(just_return_value=True)    # remove selection before insert
-##                dbg('text after (left)erase: "%s"' % text)
-                pos = sel_start = sel_to
-
-        if pos != sel_start and sel_start == sel_to:
-            # adjustpos must have moved the position; make selection match:
-            sel_start = sel_to = pos
-
-##        dbg('field._insertRight?', field._insertRight)
-##        dbg('field._allowInsert?', field._allowInsert)
-##        dbg('sel_start, end', sel_start, end)
-        if sel_start < end:
-##            dbg('text[sel_start] != field._fillChar?', text[sel_start] != field._fillChar)
-            pass
-
-        if( field._insertRight                                  # field allows right insert
-            and ((sel_start, sel_to) == field._extent           # and whole field selected
-                 or (sel_start == sel_to                        # or nothing selected
-                     and (sel_start == end                      # and cursor at right edge
-                          or (field._allowInsert                # or field allows right-insert
-                              and sel_start < end               # next to other char in field:
-                              and text[sel_start] != field._fillChar) ) ) ) ):
-##            dbg('insertRight')
-            fstr = text[start:end]
-            erasable_chars = [field._fillChar, ' ']
-
-            # if zero padding field, or a single digit, and currently a value of 0, allow erasure of 0:
-            if field._padZero or (field._isInt and (end - start == 1) and fstr[0] == '0'):
-                erasable_chars.append('0')
-
-            erased = ''
-####            dbg("fstr[0]:'%s'" % fstr[0])
-####            dbg('field_index:', field._index)
-####            dbg("fstr[0] in erasable_chars?", fstr[0] in erasable_chars)
-####            dbg("self._signOk and field._index == 0 and fstr[0] in ('-','(')?", self._signOk and field._index == 0 and fstr[0] in ('-','('))
-            if fstr[0] in erasable_chars or (self._signOk and field._index == 0 and fstr[0] in ('-','(')):
-                erased = fstr[0]
-####                dbg('value:      "%s"' % text)
-####                dbg('fstr:       "%s"' % fstr)
-####                dbg("erased:     '%s'" % erased)
-                field_sel_start = sel_start - start
-                field_sel_to = sel_to - start
-##                dbg('left fstr:  "%s"' % fstr[1:field_sel_start])
-##                dbg('right fstr: "%s"' % fstr[field_sel_to:end])
-                fstr = fstr[1:field_sel_start] + char + fstr[field_sel_to:end]
-            if field._alignRight and sel_start != sel_to:
-                field_len = end - start
-##                pos += (field_len - len(fstr))    # move cursor right by deleted amount
-                pos = sel_to
-##                dbg('setting pos to:', pos)
-                if field._padZero:
-                    fstr = '0' * (field_len - len(fstr)) + fstr
-                else:
-                    fstr = fstr.rjust(field_len)   # adjust the field accordingly
-##            dbg('field str: "%s"' % fstr)
-
-            newtext = text[:start] + fstr + text[end:]
-            if erased in ('-', '(') and self._signOk:
-                newtext = erased + newtext[1:]
-##            dbg('newtext: "%s"' % newtext)
-
-            if self._signOk and field._index == 0:
-                start -= 1             # account for sign position
-
-####            dbg('field._moveOnFieldFull?', field._moveOnFieldFull)
-####            dbg('len(fstr.lstrip()) == end-start?', len(fstr.lstrip()) == end-start)
-            if( field._moveOnFieldFull and pos == end
-                and len(fstr.lstrip()) == end-start     # if field now full
-                and (not field._stopFieldChangeIfInvalid     # and we either don't care about valid
-                     or (field._stopFieldChangeIfInvalid     # or we do and the current field value is valid
-                         and field.IsValid(fstr)))):
-
-                newpos = self._findNextEntry(end)       #   go to next field
-            else:
-                newpos = pos                            # else keep cursor at current position
-
-        if not newtext:
-##            dbg('not newtext')
-            if newpos != pos:
-##                dbg('newpos:', newpos)
-                pass
-            if self._signOk and self._useParens:
-                old_right_signpos = text.find(')')
-
-            if field._allowInsert and not field._insertRight and sel_to <= end and sel_start >= start:
-##                dbg('inserting within a left-insert-capable field')
-                field_len = end - start
-                before = text[start:sel_start]
-                after = text[sel_to:end].strip()
-####                dbg("current field:'%s'" % text[start:end])
-####                dbg("before:'%s'" % before, "after:'%s'" % after)
-                new_len = len(before) + len(after) + 1 # (for inserted char)
-####                dbg('new_len:', new_len)
-
-                if new_len < field_len:
-                    retained = after + self._template[end-(field_len-new_len):end]
-                elif new_len > end-start:
-                    retained = after[1:]
-                else:
-                    retained = after
-
-                left = text[0:start] + before
-####                dbg("left:'%s'" % left, "retained:'%s'" % retained)
-                right   = retained + text[end:]
-            else:
-                left  = text[0:pos]
-                right   = text[pos+1:]
-
-            if 'unicode' in wx.PlatformInfo and type(char) != types.UnicodeType:
-                # convert the keyboard constant to a unicode value, to
-                # ensure it can be concatenated into the control value:
-                char = char.decode(self._defaultEncoding)
-
-            newtext = left + char + right
-####            dbg('left:    "%s"' % left)
-####            dbg('right:   "%s"' % right)
-####            dbg('newtext: "%s"' % newtext)
-
-            if self._signOk and self._useParens:
-                # Balance parentheses:
-                left_signpos = newtext.find('(')
-
-                if left_signpos == -1:     # erased '('; remove ')'
-                    right_signpos = newtext.find(')')
-                    if right_signpos != -1:
-                        newtext = newtext[:right_signpos] + ' ' + newtext[right_signpos+1:]
-
-                elif old_right_signpos != -1:
-                    right_signpos = newtext.find(')')
-
-                    if right_signpos == -1: # just replaced right-paren
-                        if newtext[pos] == ' ': # we just erased '); erase '('
-                            newtext = newtext[:left_signpos] + ' ' + newtext[left_signpos+1:]
-                        else:   # replaced with digit; move ') over
-                            if self._ctrl_constraints._alignRight or self._isFloat:
-                                newtext = newtext[:-1] + ')'
-                            else:
-                                rstripped_text = newtext.rstrip()
-                                right_signpos = len(rstripped_text)
-##                                dbg('old_right_signpos:', old_right_signpos, 'right signpos now:', right_signpos)
-                                newtext = newtext[:right_signpos] + ')' + newtext[right_signpos+1:]
-
-            if( field._insertRight                                  # if insert-right field (but we didn't start at right edge)
-                and field._moveOnFieldFull                          # and should move cursor when full
-                and len(newtext[start:end].strip()) == end-start    # and field now full
-                and (not field._stopFieldChangeIfInvalid            # and we either don't care about valid
-                     or (field._stopFieldChangeIfInvalid            # or we do and the current field value is valid
-                         and field.IsValid(newtext[start:end].strip())))):
-
-                newpos = self._findNextEntry(end)                   #   go to next field
-##                dbg('newpos = nextentry =', newpos)
-            else:
-##                dbg('pos:', pos, 'newpos:', pos+1)
-                newpos = pos+1
-
-
-        if allowAutoSelect:
-            new_select_to = newpos     # (default return values)
-            match_field = None
-            match_index = None
-
-            if field._autoSelect:
-                match_index, partial_match = self._autoComplete(1,  # (always forward)
-                                                                field._compareChoices,
-                                                                newtext[start:end],
-                                                                compareNoCase=field._compareNoCase,
-                                                                current_index = field._autoCompleteIndex-1)
-                if match_index is not None and partial_match:
-                    matched_str = newtext[start:end]
-                    newtext = newtext[:start] + field._choices[match_index] + newtext[end:]
-                    new_select_to = end
-                    match_field = field
-                    if field._insertRight:
-                        # adjust position to just after partial match in field
-                        newpos = end - (len(field._choices[match_index].strip()) - len(matched_str.strip()))
-
-            elif self._ctrl_constraints._autoSelect:
-                match_index, partial_match = self._autoComplete(
-                                        1,  # (always forward)
-                                        self._ctrl_constraints._compareChoices,
-                                        newtext,
-                                        self._ctrl_constraints._compareNoCase,
-                                        current_index = self._ctrl_constraints._autoCompleteIndex - 1)
-                if match_index is not None and partial_match:
-                    matched_str = newtext
-                    newtext = self._ctrl_constraints._choices[match_index]
-                    edit_end = self._ctrl_constraints._extent[1]
-                    new_select_to = min(edit_end, len(newtext.rstrip()))
-                    match_field = self._ctrl_constraints
-                    if self._ctrl_constraints._insertRight:
-                        # adjust position to just after partial match in control:
-                        newpos = self._masklength - (len(self._ctrl_constraints._choices[match_index].strip()) - len(matched_str.strip()))
-
-##            dbg('newtext: "%s"' % newtext, 'newpos:', newpos, 'new_select_to:', new_select_to)
-##            dbg(indent=0)
-            return newtext, newpos, new_select_to, match_field, match_index
-        else:
-##            dbg('newtext: "%s"' % newtext, 'newpos:', newpos)
-##            dbg(indent=0)
-            return newtext, newpos
-
-
-    def _OnFocus(self,event):
-        """
-        This event handler is currently necessary to work around new default
-        behavior as of wxPython2.3.3;
-        The TAB key auto selects the entire contents of the wx.TextCtrl *after*
-        the EVT_SET_FOCUS event occurs; therefore we can't query/adjust the selection
-        *here*, because it hasn't happened yet.  So to prevent this behavior, and
-        preserve the correct selection when the focus event is not due to tab,
-        we need to pull the following trick:
-        """
-##        dbg('MaskedEditMixin::_OnFocus')
-        if self.IsBeingDeleted() or self.GetParent().IsBeingDeleted():
-            return 
-        wx.CallAfter(self._fixSelection)
-        event.Skip()
-        self.Refresh()
-
-
-    def _CheckValid(self, candidate=None):
-        """
-        This is the default validation checking routine; It verifies that the
-        current value of the control is a "valid value," and has the side
-        effect of coloring the control appropriately.
-        """
-##        dbg(suspend=1)
-##        dbg('MaskedEditMixin::_CheckValid: candidate="%s"' % candidate, indent=1)
-        oldValid = self._valid
-        if candidate is None: value = self._GetValue()
-        else: value = candidate
-##        dbg('value: "%s"' % value)
-        oldvalue = value
-        valid = True    # assume True
-
-        if not self.IsDefault(value) and self._isDate:                    ## Date type validation
-            valid = self._validateDate(value)
-##            dbg("valid date?", valid)
-
-        elif not self.IsDefault(value) and self._isTime:
-            valid = self._validateTime(value)
-##            dbg("valid time?", valid)
-
-        elif not self.IsDefault(value) and (self._isInt or self._isFloat):  ## Numeric type
-            valid = self._validateNumeric(value)
-##            dbg("valid Number?", valid)
-
-        if valid:   # and not self.IsDefault(value):    ## generic validation accounts for IsDefault()
-            ## valid so far; ensure also allowed by any list or regex provided:
-            valid = self._validateGeneric(value)
-##            dbg("valid value?", valid)
-
-##        dbg('valid?', valid)
-
-        if not candidate:
-            self._valid = valid
-            self._applyFormatting()
-            if self._valid != oldValid:
-##                dbg('validity changed: oldValid =',oldValid,'newvalid =', self._valid)
-##                dbg('oldvalue: "%s"' % oldvalue, 'newvalue: "%s"' % self._GetValue())
-                pass
-##        dbg(indent=0, suspend=0)
-        return valid
-
-
-    def _validateGeneric(self, candidate=None):
-        """ Validate the current value using the provided list or Regex filter (if any).
-        """
-        if candidate is None:
-            text = self._GetValue()
-        else:
-            text = candidate
-
-        valid = True    # assume True
-        for i in [-1] + self._field_indices:   # process global constraints first:
-            field = self._fields[i]
-            start, end = field._extent
-            slice = text[start:end]
-            valid = field.IsValid(slice)
-            if not valid:
-                break
-
-        return valid
-
-
-    def _validateNumeric(self, candidate=None):
-        """ Validate that the value is within the specified range (if specified.)"""
-        if candidate is None: value = self._GetValue()
-        else: value = candidate
-        try:
-            groupchar = self._fields[0]._groupChar
-            if self._isFloat:
-                number = float(value.replace(groupchar, '').replace(self._decimalChar, '.').replace('(', '-').replace(')', ''))
-            else:
-                number = long( value.replace(groupchar, '').replace('(', '-').replace(')', ''))
-                if value.strip():
-                    if self._fields[0]._alignRight:
-                        require_digit_at = self._fields[0]._extent[1]-1
-                    else:
-                        require_digit_at = self._fields[0]._extent[0]
-##                    dbg('require_digit_at:', require_digit_at)
-##                    dbg("value[rda]: '%s'" % value[require_digit_at])
-                    if value[require_digit_at] not in list(string.digits):
-                        valid = False
-                        return valid
-                # else...
-##            dbg('number:', number)
-            if self._ctrl_constraints._hasRange:
-                valid = self._ctrl_constraints._rangeLow <= number <= self._ctrl_constraints._rangeHigh
-            else:
-                valid = True
-            groupcharpos = value.rfind(groupchar)
-            if groupcharpos != -1:  # group char present
-##                dbg('groupchar found at', groupcharpos)
-                if self._isFloat and groupcharpos > self._decimalpos:
-                    # 1st one found on right-hand side is past decimal point
-##                    dbg('groupchar in fraction; illegal')
-                    return False
-                elif self._isFloat:
-                    integer = value[:self._decimalpos].strip()
-                else:
-                    integer = value.strip()
-##                dbg("integer:'%s'" % integer)
-                if integer[0] in ('-', '('):
-                    integer = integer[1:]
-                if integer[-1] == ')':
-                    integer = integer[:-1]
-
-                parts = integer.split(groupchar)
-##                dbg('parts:', parts)
-                for i in range(len(parts)):
-                    if i == 0 and abs(int(parts[0])) > 999:
-##                        dbg('group 0 too long; illegal')
-                        valid = False
-                        break
-                    elif i > 0 and (len(parts[i]) != 3 or ' ' in parts[i]):
-##                        dbg('group %i (%s) not right size; illegal' % (i, parts[i]))
-                        valid = False
-                        break
-        except ValueError:
-##            dbg('value not a valid number')
-            valid = False
-        return valid
-
-
-    def _validateDate(self, candidate=None):
-        """ Validate the current date value using the provided Regex filter.
-            Generally used for character types.BufferType
-        """
-##        dbg('MaskedEditMixin::_validateDate', indent=1)
-        if candidate is None: value = self._GetValue()
-        else: value = candidate
-##        dbg('value = "%s"' % value)
-        text = self._adjustDate(value, force4digit_year=True)     ## Fix the date up before validating it
-##        dbg('text =', text)
-        valid = True   # assume True until proven otherwise
-
-        try:
-            # replace fillChar in each field with space:
-            datestr = text[0:self._dateExtent]
-            for i in range(3):
-                field = self._fields[i]
-                start, end = field._extent
-                fstr = datestr[start:end]
-                fstr.replace(field._fillChar, ' ')
-                datestr = datestr[:start] + fstr + datestr[end:]
-
-            year, month, day = _getDateParts( datestr, self._datestyle)
-            year = int(year)
-##            dbg('self._dateExtent:', self._dateExtent)
-            if self._dateExtent == 11:
-                month = charmonths_dict[month.lower()]
-            else:
-                month = int(month)
-            day = int(day)
-##            dbg('year, month, day:', year, month, day)
-
-        except ValueError:
-##            dbg('cannot convert string to integer parts')
-            valid = False
-        except KeyError:
-##            dbg('cannot convert string to integer month')
-            valid = False
-
-        if valid:
-            # use wxDateTime to unambiguously try to parse the date:
-            # ### Note: because wxDateTime is *brain-dead* and expects months 0-11,
-            # rather than 1-12, so handle accordingly:
-            if month > 12:
-                valid = False
-            else:
-                month -= 1
-                try:
-##                    dbg("trying to create date from values day=%d, month=%d, year=%d" % (day,month,year))
-                    dateHandler = wx.DateTimeFromDMY(day,month,year)
-##                    dbg("succeeded")
-                    dateOk = True
-                except:
-##                    dbg('cannot convert string to valid date')
-                    dateOk = False
-                if not dateOk:
-                    valid = False
-
-            if valid:
-                # wxDateTime doesn't take kindly to leading/trailing spaces when parsing,
-                # so we eliminate them here:
-                timeStr     = text[self._dateExtent+1:].strip()         ## time portion of the string
-                if timeStr:
-##                    dbg('timeStr: "%s"' % timeStr)
-                    try:
-                        checkTime    = dateHandler.ParseTime(timeStr)
-                        valid = checkTime == len(timeStr)
-                    except:
-                        valid = False
-                    if not valid:
-##                        dbg('cannot convert string to valid time')
-                        pass
-##        if valid: dbg('valid date')
-##        dbg(indent=0)
-        return valid
-
-
-    def _validateTime(self, candidate=None):
-        """ Validate the current time value using the provided Regex filter.
-            Generally used for character types.BufferType
-        """
-##        dbg('MaskedEditMixin::_validateTime', indent=1)
-        # wxDateTime doesn't take kindly to leading/trailing spaces when parsing,
-        # so we eliminate them here:
-        if candidate is None: value = self._GetValue().strip()
-        else: value = candidate.strip()
-##        dbg('value = "%s"' % value)
-        valid = True   # assume True until proven otherwise
-
-        dateHandler = wx.DateTime_Today()
-        try:
-            checkTime    = dateHandler.ParseTime(value)
-##            dbg('checkTime:', checkTime, 'len(value)', len(value))
-            valid = checkTime == len(value)
-        except:
-            valid = False
-
-        if not valid:
-##            dbg('cannot convert string to valid time')
-            pass
-##        if valid: dbg('valid time')
-##        dbg(indent=0)
-        return valid
-
-
-    def _OnKillFocus(self,event):
-        """ Handler for EVT_KILL_FOCUS event.
-        """
-##        dbg('MaskedEditMixin::_OnKillFocus', 'isDate=',self._isDate, indent=1)
-        if self.IsBeingDeleted() or self.GetParent().IsBeingDeleted():
-            return 
-        if self._mask and self._IsEditable():
-            self._AdjustField(self._GetInsertionPoint())
-            self._CheckValid()   ## Call valid handler
-
-        self._LostFocus()    ## Provided for subclass use
-        event.Skip()
-##        dbg(indent=0)
-
-
-    def _fixSelection(self):
-        """
-        This gets called after the TAB traversal selection is made, if the
-        focus event was due to this, but before the EVT_LEFT_* events if
-        the focus shift was due to a mouse event.
-
-        The trouble is that, a priori, there's no explicit notification of
-        why the focus event we received.  However, the whole reason we need to
-        do this is because the default behavior on TAB traveral in a wx.TextCtrl is
-        now to select the entire contents of the window, something we don't want.
-        So we can *now* test the selection range, and if it's "the whole text"
-        we can assume the cause, change the insertion point to the start of
-        the control, and deselect.
-        """
-##        dbg('MaskedEditMixin::_fixSelection', indent=1)
-        # can get here if called with wx.CallAfter after underlying 
-        # control has been destroyed on close, but after focus
-        # events
-        if not self or not self._mask or not self._IsEditable():
-##            dbg(indent=0)
-            return
-
-        sel_start, sel_to = self._GetSelection()
-##        dbg('sel_start, sel_to:', sel_start, sel_to, 'self.IsEmpty()?', self.IsEmpty())
-
-        if( sel_start == 0 and sel_to >= len( self._mask )   #(can be greater in numeric controls because of reserved space)
-            and (not self._ctrl_constraints._autoSelect or self.IsEmpty() or self.IsDefault() ) ):
-            # This isn't normally allowed, and so assume we got here by the new
-            # "tab traversal" behavior, so we need to reset the selection
-            # and insertion point:
-##            dbg('entire text selected; resetting selection to start of control')
-            self._goHome()
-            field = self._FindField(self._GetInsertionPoint())
-            edit_start, edit_end = field._extent
-            if field._selectOnFieldEntry:
-                if self._isFloat or self._isInt and field == self._fields[0]:
-                    edit_start = 0
-                self._SetInsertionPoint(edit_start)
-                self._SetSelection(edit_start, edit_end)
-
-            elif field._insertRight:
-                self._SetInsertionPoint(edit_end)
-                self._SetSelection(edit_end, edit_end)
-
-        elif (self._isFloat or self._isInt):
-
-            text, signpos, right_signpos = self._getAbsValue()
-            if text is None or text == self._template:
-                integer = self._fields[0]
-                edit_start, edit_end = integer._extent
-
-                if integer._selectOnFieldEntry:
-##                    dbg('select on field entry:')
-                    self._SetInsertionPoint(0)
-                    self._SetSelection(0, edit_end)
-
-                elif integer._insertRight:
-##                    dbg('moving insertion point to end')
-                    self._SetInsertionPoint(edit_end)
-                    self._SetSelection(edit_end, edit_end)
-                else:
-##                    dbg('numeric ctrl is empty; start at beginning after sign')
-                    self._SetInsertionPoint(signpos+1)   ## Move past minus sign space if signed
-                    self._SetSelection(signpos+1, signpos+1)
-
-        elif sel_start > self._goEnd(getPosOnly=True):
-##            dbg('cursor beyond the end of the user input; go to end of it')
-            self._goEnd()
-        else:
-##            dbg('sel_start, sel_to:', sel_start, sel_to, 'self._masklength:', self._masklength)
-            pass
-##        dbg(indent=0)
-
-
-    def _Keypress(self,key):
-        """ Method provided to override OnChar routine. Return False to force
-            a skip of the 'normal' OnChar process. Called before class OnChar.
-        """
-        return True
-
-
-    def _LostFocus(self):
-        """ Method provided for subclasses. _LostFocus() is called after
-            the class processes its EVT_KILL_FOCUS event code.
-        """
-        pass
-
-
-    def _OnDoubleClick(self, event):
-        """ selects field under cursor on dclick."""
-        pos = self._GetInsertionPoint()
-        field = self._FindField(pos)
-        start, end = field._extent
-        self._SetInsertionPoint(start)
-        self._SetSelection(start, end)
-
-
-    def _Change(self):
-        """ Method provided for subclasses. Called by internal EVT_TEXT
-            handler. Return False to override the class handler, True otherwise.
-        """
-        return True
-
-
-    def _Cut(self):
-        """
-        Used to override the default Cut() method in base controls, instead
-        copying the selection to the clipboard and then blanking the selection,
-        leaving only the mask in the selected area behind.
-        Note: _Cut (read "undercut" ;-) must be called from a Cut() override in the
-        derived control because the mixin functions can't override a method of
-        a sibling class.
-        """
-##        dbg("MaskedEditMixin::_Cut", indent=1)
-        value = self._GetValue()
-##        dbg('current value: "%s"' % value)
-        sel_start, sel_to = self._GetSelection()                   ## check for a range of selected text
-##        dbg('selected text: "%s"' % value[sel_start:sel_to].strip())
-        do = wx.TextDataObject()
-        do.SetText(value[sel_start:sel_to].strip())
-        wx.TheClipboard.Open()
-        wx.TheClipboard.SetData(do)
-        wx.TheClipboard.Close()
-
-        if sel_to - sel_start != 0:
-            self._OnErase()
-##        dbg(indent=0)
-
-
-# WS Note: overriding Copy is no longer necessary given that you
-# can no longer select beyond the last non-empty char in the control.
-#
-##    def _Copy( self ):
-##        """
-##        Override the wx.TextCtrl's .Copy function, with our own
-##        that does validation.  Need to strip trailing spaces.
-##        """
-##        sel_start, sel_to = self._GetSelection()
-##        select_len = sel_to - sel_start
-##        textval = wx.TextCtrl._GetValue(self)
-##
-##        do = wx.TextDataObject()
-##        do.SetText(textval[sel_start:sel_to].strip())
-##        wx.TheClipboard.Open()
-##        wx.TheClipboard.SetData(do)
-##        wx.TheClipboard.Close()
-
-
-    def _getClipboardContents( self ):
-        """ Subroutine for getting the current contents of the clipboard.
-        """
-        do = wx.TextDataObject()
-        wx.TheClipboard.Open()
-        success = wx.TheClipboard.GetData(do)
-        wx.TheClipboard.Close()
-
-        if not success:
-            return None
-        else:
-            # Remove leading and trailing spaces before evaluating contents
-            return do.GetText().strip()
-
-
-    def _validatePaste(self, paste_text, sel_start, sel_to, raise_on_invalid=False):
-        """
-        Used by paste routine and field choice validation to see
-        if a given slice of paste text is legal for the area in question:
-        returns validity, replacement text, and extent of paste in
-        template.
-        """
-##        dbg(suspend=1)
-##        dbg('MaskedEditMixin::_validatePaste("%(paste_text)s", %(sel_start)d, %(sel_to)d), raise_on_invalid? %(raise_on_invalid)d' % locals(), indent=1)
-        select_length = sel_to - sel_start
-        maxlength = select_length
-##        dbg('sel_to - sel_start:', maxlength)
-        if maxlength == 0:
-            maxlength = self._masklength - sel_start
-            item = 'control'
-        else:
-            item = 'selection'
-##        dbg('maxlength:', maxlength)
-        if 'unicode' in wx.PlatformInfo and type(paste_text) != types.UnicodeType:
-            paste_text = paste_text.decode(self._defaultEncoding)
-
-        length_considered = len(paste_text)
-        if length_considered > maxlength:
-##            dbg('paste text will not fit into the %s:' % item, indent=0)
-            if raise_on_invalid:
-##                dbg(indent=0, suspend=0)
-                if item == 'control':
-                    ve = ValueError('"%s" will not fit into the control "%s"' % (paste_text, self.name))
-                    ve.value = paste_text
-                    raise ve
-                else:
-                    ve = ValueError('"%s" will not fit into the selection' % paste_text)
-                    ve.value = paste_text
-                    raise ve
-            else:
-##                dbg(indent=0, suspend=0)
-                return False, None, None
-
-        text = self._template
-##        dbg('length_considered:', length_considered)
-
-        valid_paste = True
-        replacement_text = ""
-        replace_to = sel_start
-        i = 0
-        while valid_paste and i < length_considered and replace_to < self._masklength:
-            if paste_text[i:] == self._template[replace_to:length_considered]:
-                # remainder of paste matches template; skip char-by-char analysis
-##                dbg('remainder paste_text[%d:] (%s) matches template[%d:%d]' % (i, paste_text[i:], replace_to, length_considered))
-                replacement_text += paste_text[i:]
-                replace_to = i = length_considered
-                continue
-            # else:
-            char = paste_text[i]
-            field = self._FindField(replace_to)
-            if not field._compareNoCase:
-                if field._forceupper:   char = char.upper()
-                elif field._forcelower: char = char.lower()
-
-##            dbg('char:', "'"+char+"'", 'i =', i, 'replace_to =', replace_to)
-##            dbg('self._isTemplateChar(%d)?' % replace_to, self._isTemplateChar(replace_to))
-            if not self._isTemplateChar(replace_to) and self._isCharAllowed( char, replace_to, allowAutoSelect=False, ignoreInsertRight=True):
-                replacement_text += char
-##                dbg("not template(%(replace_to)d) and charAllowed('%(char)s',%(replace_to)d)" % locals())
-##                dbg("replacement_text:", '"'+replacement_text+'"')
-                i += 1
-                replace_to += 1
-            elif( char == self._template[replace_to]
-                  or (self._signOk and
-                          ( (i == 0 and (char == '-' or (self._useParens and char == '(')))
-                            or (i == self._masklength - 1 and self._useParens and char == ')') ) ) ):
-                replacement_text += char
-##                dbg("'%(char)s' == template(%(replace_to)d)" % locals())
-##                dbg("replacement_text:", '"'+replacement_text+'"')
-                i += 1
-                replace_to += 1
-            else:
-                next_entry = self._findNextEntry(replace_to, adjustInsert=False)
-                if next_entry == replace_to:
-                    valid_paste = False
-                else:
-                    replacement_text += self._template[replace_to:next_entry]
-##                    dbg("skipping template; next_entry =", next_entry)
-##                    dbg("replacement_text:", '"'+replacement_text+'"')
-                    replace_to = next_entry  # so next_entry will be considered on next loop
-
-        if not valid_paste and raise_on_invalid:
-##            dbg('raising exception', indent=0, suspend=0)
-            ve = ValueError('"%s" cannot be inserted into the control "%s"' % (paste_text, self.name))
-            ve.value = paste_text
-            raise ve
-
-
-        elif i < len(paste_text):
-            valid_paste = False
-            if raise_on_invalid:
-##                dbg('raising exception', indent=0, suspend=0)
-                ve = ValueError('"%s" will not fit into the control "%s"' % (paste_text, self.name))
-                ve.value = paste_text
-                raise ve
-
-##        dbg('valid_paste?', valid_paste)
-        if valid_paste:
-##            dbg('replacement_text: "%s"' % replacement_text, 'replace to:', replace_to)
-            pass
-##        dbg(indent=0, suspend=0)
-        return valid_paste, replacement_text, replace_to
-
-
-    def _Paste( self, value=None, raise_on_invalid=False, just_return_value=False ):
-        """
-        Used to override the base control's .Paste() function,
-        with our own that does validation.
-        Note: _Paste must be called from a Paste() override in the
-        derived control because the mixin functions can't override a
-        method of a sibling class.
-        """
-##        dbg('MaskedEditMixin::_Paste (value = "%s")' % value, indent=1)
-        if value is None:
-            paste_text = self._getClipboardContents()
-        else:
-            paste_text = value
-
-        if paste_text is not None:
-
-            if 'unicode' in wx.PlatformInfo and type(paste_text) != types.UnicodeType:
-                paste_text = paste_text.decode(self._defaultEncoding)
-
-##            dbg('paste text: "%s"' % paste_text)
-            # (conversion will raise ValueError if paste isn't legal)
-            sel_start, sel_to = self._GetSelection()
-##            dbg('selection:', (sel_start, sel_to))
-
-            # special case: handle allowInsert fields properly
-            field = self._FindField(sel_start)
-            edit_start, edit_end = field._extent
-            new_pos = None
-            if field._allowInsert and sel_to <= edit_end and (sel_start + len(paste_text) < edit_end or field._insertRight):
-                if field._insertRight:
-                    # want to paste to the left; see if it will fit:
-                    left_text = self._GetValue()[edit_start:sel_start].lstrip()
-##                    dbg('len(left_text):', len(left_text))
-##                    dbg('len(paste_text):', len(paste_text))
-##                    dbg('sel_start - (len(left_text) + len(paste_text)) >= edit_start?', sel_start - (len(left_text) + len(paste_text)) >= edit_start)
-                    if sel_start - (len(left_text) - (sel_to - sel_start) + len(paste_text)) >= edit_start:
-                        # will fit! create effective paste text, and move cursor back to do so:
-                        paste_text = left_text + paste_text
-                        sel_start -= len(left_text)
-                        paste_text = paste_text.rjust(sel_to - sel_start)
-##                        dbg('modified paste_text to be: "%s"' % paste_text)
-##                        dbg('modified selection to:', (sel_start, sel_to))
-                    else:
-##                        dbg("won't fit left;", 'paste text remains: "%s"' % paste_text)
-                        pass
-                else:
-                    paste_text = paste_text + self._GetValue()[sel_to:edit_end].rstrip()
-##                    dbg("allow insert, but not insert right;", 'paste text set to: "%s"' % paste_text)
-
-
-                new_pos = sel_start + len(paste_text)   # store for subsequent positioning
-##                dbg('paste within insertable field; adjusted paste_text: "%s"' % paste_text, 'end:', edit_end)
-##                dbg('expanded selection to:', (sel_start, sel_to))
-
-            # Another special case: paste won't fit, but it's a right-insert field where entire
-            # non-empty value is selected, and there's room if the selection is expanded leftward:
-            if( len(paste_text) > sel_to - sel_start
-                and field._insertRight
-                and sel_start > edit_start
-                and sel_to >= edit_end
-                and not self._GetValue()[edit_start:sel_start].strip() ):
-                # text won't fit within selection, but left of selection is empty;
-                # check to see if we can expand selection to accommodate the value:
-                empty_space = sel_start - edit_start
-                amount_needed = len(paste_text) - (sel_to - sel_start)
-                if amount_needed <= empty_space:
-                    sel_start -= amount_needed
-##                    dbg('expanded selection to:', (sel_start, sel_to))
-
-
-            # another special case: deal with signed values properly:
-            if self._signOk:
-                signedvalue, signpos, right_signpos = self._getSignedValue()
-                paste_signpos = paste_text.find('-')
-                if paste_signpos == -1:
-                    paste_signpos = paste_text.find('(')
-
-                # if paste text will result in signed value:
-####                dbg('paste_signpos != -1?', paste_signpos != -1)
-####                dbg('sel_start:', sel_start, 'signpos:', signpos)
-####                dbg('field._insertRight?', field._insertRight)
-####                dbg('sel_start - len(paste_text) >= signpos?', sel_start - len(paste_text) <= signpos)
-                if paste_signpos != -1 and (sel_start <= signpos
-                                            or (field._insertRight and sel_start - len(paste_text) <= signpos)):
-                    signed = True
-                else:
-                    signed = False
-                # remove "sign" from paste text, so we can auto-adjust for sign type after paste:
-                paste_text = paste_text.replace('-', ' ').replace('(',' ').replace(')','')
-##                dbg('unsigned paste text: "%s"' % paste_text)
-            else:
-                signed = False
-
-            # another special case: deal with insert-right fields when selection is empty and
-            # cursor is at end of field:
-####            dbg('field._insertRight?', field._insertRight)
-####            dbg('sel_start == edit_end?', sel_start == edit_end)
-####            dbg('sel_start', sel_start, 'sel_to', sel_to)
-            if field._insertRight and sel_start == edit_end and sel_start == sel_to:
-                sel_start -= len(paste_text)
-                if sel_start < 0:
-                    sel_start = 0
-##                dbg('adjusted selection:', (sel_start, sel_to))
-
-            raise_on_invalid = raise_on_invalid or field._raiseOnInvalidPaste
-            try:
-                valid_paste, replacement_text, replace_to = self._validatePaste(paste_text, sel_start, sel_to, raise_on_invalid)
-            except:
-##                dbg('exception thrown', indent=0)
-                raise
-
-            if not valid_paste:
-##                dbg('paste text not legal for the selection or portion of the control following the cursor;')
-                if not wx.Validator_IsSilent():
-                    wx.Bell()
-##                dbg(indent=0)
-                return None, -1
-            # else...
-            text = self._eraseSelection()
-
-            new_text = text[:sel_start] + replacement_text + text[replace_to:]
-            if new_text:
-                new_text = string.ljust(new_text,self._masklength)
-            if signed:
-                new_text, signpos, right_signpos = self._getSignedValue(candidate=new_text)
-                if new_text:
-                    if self._useParens:
-                        new_text = new_text[:signpos] + '(' + new_text[signpos+1:right_signpos] + ')' + new_text[right_signpos+1:]
-                    else:
-                        new_text = new_text[:signpos] + '-' + new_text[signpos+1:]
-                    if not self._isNeg:
-                        self._isNeg = 1
-
-##            dbg("new_text:", '"'+new_text+'"')
-
-            if not just_return_value:
-                if new_text != self._GetValue():
-                    self.modified = True
-                if new_text == '':
-                    self.ClearValue()
-                else:
-                    wx.CallAfter(self._SetValue, new_text)
-                    if new_pos is None:
-                        new_pos = sel_start + len(replacement_text)
-                    wx.CallAfter(self._SetInsertionPoint, new_pos)
-            else:
-##                dbg(indent=0)
-                return new_text, replace_to
-        elif just_return_value:
-##            dbg(indent=0)
-            return self._GetValue(), sel_to
-##        dbg(indent=0)
-
-    def _Undo(self, value=None, prev=None, just_return_results=False):
-        """ Provides an Undo() method in base controls. """
-##        dbg("MaskedEditMixin::_Undo", indent=1)
-        if value is None:
-            value = self._GetValue()
-        if prev is None:
-            prev = self._prevValue
-##        dbg('current value:  "%s"' % value)
-##        dbg('previous value: "%s"' % prev)
-        if prev is None:
-##            dbg('no previous value', indent=0)
-            return
-
-        elif value != prev:
-            # Determine what to select: (relies on fixed-length strings)
-            # (This is a lot harder than it would first appear, because
-            # of mask chars that stay fixed, and so break up the "diff"...)
-
-            # Determine where they start to differ:
-            i = 0
-            length = len(value)     # (both are same length in masked control)
-
-            while( value[:i] == prev[:i] ):
-                    i += 1
-            sel_start = i - 1
-
-
-            # handle signed values carefully, so undo from signed to unsigned or vice-versa
-            # works properly:
-            if self._signOk:
-                text, signpos, right_signpos = self._getSignedValue(candidate=prev)
-                if self._useParens:
-                    if prev[signpos] == '(' and prev[right_signpos] == ')':
-                        self._isNeg = True
-                    else:
-                        self._isNeg = False
-                    # eliminate source of "far-end" undo difference if using balanced parens:
-                    value = value.replace(')', ' ')
-                    prev = prev.replace(')', ' ')
-                elif prev[signpos] == '-':
-                    self._isNeg = True
-                else:
-                    self._isNeg = False
-
-            # Determine where they stop differing in "undo" result:
-            sm = difflib.SequenceMatcher(None, a=value, b=prev)
-            i, j, k = sm.find_longest_match(sel_start, length, sel_start, length)
-##            dbg('i,j,k = ', (i,j,k), 'value[i:i+k] = "%s"' % value[i:i+k], 'prev[j:j+k] = "%s"' % prev[j:j+k] )
-
-            if k == 0:                              # no match found; select to end
-                sel_to = length
-            else:
-                code_5tuples = sm.get_opcodes()
-                for op, i1, i2, j1, j2 in code_5tuples:
-##                    dbg("%7s value[%d:%d] (%s) prev[%d:%d] (%s)" % (op, i1, i2, value[i1:i2], j1, j2, prev[j1:j2]))
-                    pass
-
-                diff_found = False
-                # look backward through operations needed to produce "previous" value;
-                # first change wins:
-                for next_op in range(len(code_5tuples)-1, -1, -1):
-                    op, i1, i2, j1, j2 = code_5tuples[next_op]
-##                    dbg('value[i1:i2]: "%s"' % value[i1:i2], 'template[i1:i2] "%s"' % self._template[i1:i2])
-                    field = self._FindField(i2)
-                    if op == 'insert' and prev[j1:j2] != self._template[j1:j2]:
-##                        dbg('insert found: selection =>', (j1, j2))
-                        sel_start = j1
-                        sel_to = j2
-                        diff_found = True
-                        break
-                    elif op == 'delete' and value[i1:i2] != self._template[i1:i2]:
-                        edit_start, edit_end = field._extent
-                        if field._insertRight and (field._allowInsert or i2 == edit_end):
-                            sel_start = i2
-                            sel_to = i2
-                        else:
-                            sel_start = i1
-                            sel_to = j1
-##                        dbg('delete found: selection =>', (sel_start, sel_to))
-                        diff_found = True
-                        break
-                    elif op == 'replace':
-                        if not prev[i1:i2].strip() and field._insertRight:
-                            sel_start = sel_to = j2
-                        else:
-                            sel_start = j1
-                            sel_to = j2
-##                        dbg('replace found: selection =>', (sel_start, sel_to))
-                        diff_found = True
-                        break
-
-
-                if diff_found:
-                    # now go forwards, looking for earlier changes:
-##                    dbg('searching forward...')
-                    for next_op in range(len(code_5tuples)):
-                        op, i1, i2, j1, j2 = code_5tuples[next_op]
-                        field = self._FindField(i1)
-                        if op == 'equal':
-                            continue
-                        elif op == 'replace':
-                            if field._insertRight:
-                                # if replace with spaces in an insert-right control, ignore "forward" replace
-                                if not prev[i1:i2].strip():
-                                    continue
-                                elif j1 < i1:
-##                                    dbg('setting sel_start to', j1)
-                                    sel_start = j1
-                                else:
-##                                    dbg('setting sel_start to', i1)
-                                    sel_start = i1
-                            else:
-##                                dbg('setting sel_start to', i1)
-                                sel_start = i1
-##                            dbg('saw replace; breaking')
-                            break
-                        elif op == 'insert' and not value[i1:i2]:
-##                            dbg('forward %s found' % op)
-                            if prev[j1:j2].strip():
-##                                dbg('item to insert non-empty; setting sel_start to', j1)
-                                sel_start = j1
-                                break
-                            elif not field._insertRight:
-##                                dbg('setting sel_start to inserted space:', j1)
-                                sel_start = j1
-                                break
-                        elif op == 'delete':
-##                            dbg('delete; field._insertRight?', field._insertRight, 'value[%d:%d].lstrip: "%s"' % (i1,i2,value[i1:i2].lstrip()))
-                            if field._insertRight:
-                                if value[i1:i2].lstrip():
-##                                    dbg('setting sel_start to ', j1)
-                                    sel_start = j1
-##                                    dbg('breaking loop')
-                                    break
-                                else:
-                                    continue
-                            else:
-##                                dbg('saw delete; breaking')
-                                break
-                        else:
-##                            dbg('unknown code!')
-                            # we've got what we need
-                            break
-
-
-                if not diff_found:
-##                    dbg('no insert,delete or replace found (!)')
-                    # do "left-insert"-centric processing of difference based on l.c.s.:
-                    if i == j and j != sel_start:         # match starts after start of selection
-                        sel_to = sel_start + (j-sel_start)  # select to start of match
-                    else:
-                        sel_to = j                          # (change ends at j)
-
-
-            # There are several situations where the calculated difference is
-            # not what we want to select.  If changing sign, or just adding
-            # group characters, we really don't want to highlight the characters
-            # changed, but instead leave the cursor where it is.
-            # Also, there a situations in which the difference can be ambiguous;
-            # Consider:
-            #
-            # current value:    11234
-            # previous value:   1111234
-            #
-            # Where did the cursor actually lie and which 1s were selected on the delete
-            # operation?
-            #
-            # Also, difflib can "get it wrong;" Consider:
-            #
-            # current value:    "       128.66"
-            # previous value:   "       121.86"
-            #
-            # difflib produces the following opcodes, which are sub-optimal:
-            #    equal value[0:9] (       12) prev[0:9] (       12)
-            #   insert value[9:9] () prev[9:11] (1.)
-            #    equal value[9:10] (8) prev[11:12] (8)
-            #   delete value[10:11] (.) prev[12:12] ()
-            #    equal value[11:12] (6) prev[12:13] (6)
-            #   delete value[12:13] (6) prev[13:13] ()
-            #
-            # This should have been:
-            #    equal value[0:9] (       12) prev[0:9] (       12)
-            #  replace value[9:11] (8.6) prev[9:11] (1.8)
-            #    equal value[12:13] (6) prev[12:13] (6)
-            #
-            # But it didn't figure this out!
-            #
-            # To get all this right, we use the previous selection recorded to help us...
-
-            if (sel_start, sel_to) != self._prevSelection:
-##                dbg('calculated selection', (sel_start, sel_to), "doesn't match previous", self._prevSelection)
-
-                prev_sel_start, prev_sel_to = self._prevSelection
-                field = self._FindField(sel_start)
-                if( self._signOk
-                      and sel_start < self._masklength
-                      and (prev[sel_start] in ('-', '(', ')')
-                                     or value[sel_start] in ('-', '(', ')')) ):
-                    # change of sign; leave cursor alone...
-##                    dbg("prev[sel_start] in ('-', '(', ')')?", prev[sel_start] in ('-', '(', ')'))
-##                    dbg("value[sel_start] in ('-', '(', ')')?", value[sel_start] in ('-', '(', ')'))
-##                    dbg('setting selection to previous one')
-                    sel_start, sel_to = self._prevSelection
-
-                elif field._groupdigits and (value[sel_start:sel_to] == field._groupChar
-                                             or prev[sel_start:sel_to] == field._groupChar):
-                    # do not highlight grouping changes
-##                    dbg('value[sel_start:sel_to] == field._groupChar?', value[sel_start:sel_to] == field._groupChar)
-##                    dbg('prev[sel_start:sel_to] == field._groupChar?', prev[sel_start:sel_to] == field._groupChar)
-##                    dbg('setting selection to previous one')
-                    sel_start, sel_to = self._prevSelection
-
-                else:
-                    calc_select_len = sel_to - sel_start
-                    prev_select_len = prev_sel_to - prev_sel_start
-
-##                    dbg('sel_start == prev_sel_start', sel_start == prev_sel_start)
-##                    dbg('sel_to > prev_sel_to', sel_to > prev_sel_to)
-
-                    if prev_select_len >= calc_select_len:
-                        # old selection was bigger; trust it:
-##                        dbg('prev_select_len >= calc_select_len?', prev_select_len >= calc_select_len)
-                        if not field._insertRight:
-##                            dbg('setting selection to previous one')
-                            sel_start, sel_to = self._prevSelection
-                        else:
-                            sel_to = self._prevSelection[1]
-##                            dbg('setting selection to', (sel_start, sel_to))
-
-                    elif( sel_to > prev_sel_to                  # calculated select past last selection
-                          and prev_sel_to < len(self._template) # and prev_sel_to not at end of control
-                          and sel_to == len(self._template) ):  # and calculated selection goes to end of control
-
-                        i, j, k = sm.find_longest_match(prev_sel_to, length, prev_sel_to, length)
-##                        dbg('i,j,k = ', (i,j,k), 'value[i:i+k] = "%s"' % value[i:i+k], 'prev[j:j+k] = "%s"' % prev[j:j+k] )
-                        if k > 0:
-                            # difflib must not have optimized opcodes properly;
-                            sel_to = j
-
-                    else:
-                        # look for possible ambiguous diff:
-
-                        # if last change resulted in no selection, test from resulting cursor position:
-                        if prev_sel_start == prev_sel_to:
-                            calc_select_len = sel_to - sel_start
-                            field = self._FindField(prev_sel_start)
-
-                            # determine which way to search from last cursor position for ambiguous change:
-                            if field._insertRight:
-                                test_sel_start = prev_sel_start
-                                test_sel_to = prev_sel_start + calc_select_len
-                            else:
-                                test_sel_start = prev_sel_start - calc_select_len
-                                test_sel_to = prev_sel_start
-                        else:
-                            test_sel_start, test_sel_to = prev_sel_start, prev_sel_to
-
-##                        dbg('test selection:', (test_sel_start, test_sel_to))
-##                        dbg('calc change: "%s"' % prev[sel_start:sel_to])
-##                        dbg('test change: "%s"' % prev[test_sel_start:test_sel_to])
-
-                        # if calculated selection spans characters, and same characters
-                        # "before" the previous insertion point are present there as well,
-                        # select the ones related to the last known selection instead.
-                        if( sel_start != sel_to
-                            and test_sel_to < len(self._template)
-                            and prev[test_sel_start:test_sel_to] == prev[sel_start:sel_to] ):
-
-                            sel_start, sel_to = test_sel_start, test_sel_to
-
-                # finally, make sure that the old and new values are
-                # different where we say they're different:
-                while( sel_to - 1 > 0
-                        and sel_to > sel_start
-                        and value[sel_to-1:] == prev[sel_to-1:]):
-                    sel_to -= 1
-                while( sel_start + 1 < self._masklength
-                        and sel_start < sel_to
-                        and value[:sel_start+1] == prev[:sel_start+1]):
-                    sel_start += 1
-
-##            dbg('sel_start, sel_to:', sel_start, sel_to)
-##            dbg('previous value: "%s"' % prev)
-##            dbg(indent=0)
-            if just_return_results:
-                return prev, (sel_start, sel_to)
-            # else...
-            self._SetValue(prev)
-            self._SetInsertionPoint(sel_start)
-            self._SetSelection(sel_start, sel_to)
-
-        else:
-##            dbg('no difference between previous value')
-##            dbg(indent=0)
-            if just_return_results:
-                return prev, self._GetSelection()
-
-
-    def _OnClear(self, event):
-        """ Provides an action for context menu delete operation """
-        self.ClearValue()
-
-
-    def _OnContextMenu(self, event):
-##        dbg('MaskedEditMixin::OnContextMenu()', indent=1)
-        menu = wx.Menu()
-        menu.Append(wx.ID_UNDO, "Undo", "")
-        menu.AppendSeparator()
-        menu.Append(wx.ID_CUT, "Cut", "")
-        menu.Append(wx.ID_COPY, "Copy", "")
-        menu.Append(wx.ID_PASTE, "Paste", "")
-        menu.Append(wx.ID_CLEAR, "Delete", "")
-        menu.AppendSeparator()
-        menu.Append(wx.ID_SELECTALL, "Select All", "")
-
-        wx.EVT_MENU(menu, wx.ID_UNDO, self._OnCtrl_Z)
-        wx.EVT_MENU(menu, wx.ID_CUT, self._OnCtrl_X)
-        wx.EVT_MENU(menu, wx.ID_COPY, self._OnCtrl_C)
-        wx.EVT_MENU(menu, wx.ID_PASTE, self._OnCtrl_V)
-        wx.EVT_MENU(menu, wx.ID_CLEAR, self._OnClear)
-        wx.EVT_MENU(menu, wx.ID_SELECTALL, self._OnCtrl_A)
-
-        # ## WSS: The base control apparently handles
-        # enable/disable of wx.ID_CUT, wx.ID_COPY, wx.ID_PASTE
-        # and wx.ID_CLEAR menu items even if the menu is one
-        # we created.  However, it doesn't do undo properly,
-        # so we're keeping track of previous values ourselves.
-        # Therefore, we have to override the default update for
-        # that item on the menu:
-        wx.EVT_UPDATE_UI(self, wx.ID_UNDO, self._UndoUpdateUI)
-        self._contextMenu = menu
-
-        self.PopupMenu(menu, event.GetPosition())
-        menu.Destroy()
-        self._contextMenu = None
-##        dbg(indent=0)
-
-    def _UndoUpdateUI(self, event):
-        if self._prevValue is None or self._prevValue == self._curValue:
-            self._contextMenu.Enable(wx.ID_UNDO, False)
-        else:
-            self._contextMenu.Enable(wx.ID_UNDO, True)
-
-
-    def _OnCtrlParametersChanged(self):
-        """
-        Overridable function to allow derived classes to take action as a
-        result of parameter changes prior to possibly changing the value
-        of the control.
-        """
-        pass
-
- ## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-class MaskedEditAccessorsMixin:
-    """
-    To avoid a ton of boiler-plate, and to automate the getter/setter generation
-    for each valid control parameter so we never forget to add the functions when
-    adding parameters, this class programmatically adds the masked edit mixin
-    parameters to itself.
-    (This makes it easier for Designers like Boa to deal with masked controls.)
-
-    To further complicate matters, this is done with an extra level of inheritance,
-    so that "general" classes like masked.TextCtrl can have all possible attributes,
-    while derived classes, like masked.TimeCtrl and masked.NumCtrl can prevent
-    exposure of those optional attributes of their base class that do not make
-    sense for their derivation.
-
-    Therefore, we define:
-        BaseMaskedTextCtrl(TextCtrl, MaskedEditMixin)
-    and
-        masked.TextCtrl(BaseMaskedTextCtrl, MaskedEditAccessorsMixin).
-
-    This allows us to then derive:
-        masked.NumCtrl( BaseMaskedTextCtrl )
-
-    and not have to expose all the same accessor functions for the
-    derived control when they don't all make sense for it.
-
-    """
-
-    # Define the default set of attributes exposed by the most generic masked controls:
-    exposed_basectrl_params = MaskedEditMixin.valid_ctrl_params.keys() + Field.valid_params.keys()
-    exposed_basectrl_params.remove('index')
-    exposed_basectrl_params.remove('extent')
-    exposed_basectrl_params.remove('foregroundColour')   # (base class already has this)
-
-    for param in exposed_basectrl_params:
-        propname = param[0].upper() + param[1:]
-        exec('def Set%s(self, value): self.SetCtrlParameters(%s=value)' % (propname, param))
-        exec('def Get%s(self): return self.GetCtrlParameter("%s")''' % (propname, param))
-
-        if param.find('Colour') != -1:
-            # add non-british spellings, for backward-compatibility
-            propname.replace('Colour', 'Color')
-
-            exec('def Set%s(self, value): self.SetCtrlParameters(%s=value)' % (propname, param))
-            exec('def Get%s(self): return self.GetCtrlParameter("%s")''' % (propname, param))
-
-
-
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-## these are helper subroutines:
-
-def _movetofloat( origvalue, fmtstring, neg, addseparators=False, sepchar = ',',fillchar=' '):
-    """ addseparators = add separator character every three numerals if True
-    """
-    fmt0 = fmtstring.split('.')
-    fmt1 = fmt0[0]
-    fmt2 = fmt0[1]
-    val  = origvalue.split('.')[0].strip()
-    ret  = fillchar * (len(fmt1)-len(val)) + val + "." + "0" * len(fmt2)
-    if neg:
-        ret = '-' + ret[1:]
-    return (ret,len(fmt1))
-
-
-def _isDateType( fmtstring ):
-    """ Checks the mask and returns True if it fits an allowed
-        date or datetime format.
-    """
-    dateMasks = ("^##/##/####",
-                 "^##-##-####",
-                 "^##.##.####",
-                 "^####/##/##",
-                 "^####-##-##",
-                 "^####.##.##",
-                 "^##/CCC/####",
-                 "^##.CCC.####",
-                 "^##/##/##$",
-                 "^##/##/## ",
-                 "^##/CCC/##$",
-                 "^##.CCC.## ",)
-    reString  = "|".join(dateMasks)
-    filter = re.compile( reString)
-    if re.match(filter,fmtstring): return True
-    return False
-
-def _isTimeType( fmtstring ):
-    """ Checks the mask and returns True if it fits an allowed
-        time format.
-    """
-    reTimeMask = "^##:##(:##)?( (AM|PM))?"
-    filter = re.compile( reTimeMask )
-    if re.match(filter,fmtstring): return True
-    return False
-
-
-def _isFloatingPoint( fmtstring):
-    filter = re.compile("[ ]?[#]+\.[#]+\n")
-    if re.match(filter,fmtstring+"\n"): return True
-    return False
-
-
-def _isInteger( fmtstring ):
-    filter = re.compile("[#]+\n")
-    if re.match(filter,fmtstring+"\n"): return True
-    return False
-
-
-def _getDateParts( dateStr, dateFmt ):
-    if len(dateStr) > 11: clip = dateStr[0:11]
-    else:                 clip = dateStr
-    if clip[-2] not in string.digits:
-        clip = clip[:-1]    # (got part of time; drop it)
-
-    dateSep = (('/' in clip) * '/') + (('-' in clip) * '-') + (('.' in clip) * '.')
-    slices  = clip.split(dateSep)
-    if dateFmt == "MDY":
-        y,m,d = (slices[2],slices[0],slices[1])  ## year, month, date parts
-    elif dateFmt == "DMY":
-        y,m,d = (slices[2],slices[1],slices[0])  ## year, month, date parts
-    elif dateFmt == "YMD":
-        y,m,d = (slices[0],slices[1],slices[2])  ## year, month, date parts
-    else:
-        y,m,d = None, None, None
-    if not y:
-        return None
-    else:
-        return y,m,d
-
-
-def _getDateSepChar(dateStr):
-    clip   = dateStr[0:10]
-    dateSep = (('/' in clip) * '/') + (('-' in clip) * '-') + (('.' in clip) * '.')
-    return dateSep
-
-
-def _makeDate( year, month, day, dateFmt, dateStr):
-    sep    = _getDateSepChar( dateStr)
-    if dateFmt == "MDY":
-        return "%s%s%s%s%s" % (month,sep,day,sep,year)  ## year, month, date parts
-    elif dateFmt == "DMY":
-        return "%s%s%s%s%s" % (day,sep,month,sep,year)  ## year, month, date parts
-    elif dateFmt == "YMD":
-        return "%s%s%s%s%s" % (year,sep,month,sep,day)  ## year, month, date parts
-    else:
-        return none
-
-
-def _getYear(dateStr,dateFmt):
-    parts = _getDateParts( dateStr, dateFmt)
-    return parts[0]
-
-def _getMonth(dateStr,dateFmt):
-    parts = _getDateParts( dateStr, dateFmt)
-    return parts[1]
-
-def _getDay(dateStr,dateFmt):
-    parts = _getDateParts( dateStr, dateFmt)
-    return parts[2]
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-class __test(wx.PySimpleApp):
-        def OnInit(self):
-            from wx.lib.rcsizer import RowColSizer
-            self.frame = wx.Frame( None, -1, "MaskedEditMixin 0.0.7 Demo Page #1", size = (700,600))
-            self.panel = wx.Panel( self.frame, -1)
-            self.sizer = RowColSizer()
-            self.labels = []
-            self.editList  = []
-            rowcount    = 4
-
-            id, id1 = wx.NewId(), wx.NewId()
-            self.command1  = wx.Button( self.panel, id, "&Close" )
-            self.command2  = wx.Button( self.panel, id1, "&AutoFormats" )
-            self.sizer.Add(self.command1, row=0, col=0, flag=wx.ALL, border = 5)
-            self.sizer.Add(self.command2, row=0, col=1, colspan=2, flag=wx.ALL, border = 5)
-            self.panel.Bind(wx.EVT_BUTTON, self.onClick, self.command1 )
-##            self.panel.SetDefaultItem(self.command1 )
-            self.panel.Bind(wx.EVT_BUTTON, self.onClickPage, self.command2)
-
-            self.check1 = wx.CheckBox( self.panel, -1, "Disallow Empty" )
-            self.check2 = wx.CheckBox( self.panel, -1, "Highlight Empty" )
-            self.sizer.Add( self.check1, row=0,col=3, flag=wx.ALL,border=5 )
-            self.sizer.Add( self.check2, row=0,col=4, flag=wx.ALL,border=5 )
-            self.panel.Bind(wx.EVT_CHECKBOX, self._onCheck1, self.check1 )
-            self.panel.Bind(wx.EVT_CHECKBOX, self._onCheck2, self.check2 )
-
-
-            label = """Press ctrl-s in any field to output the value and plain value. Press ctrl-x to clear and re-set any field.
-Note that all controls have been auto-sized by including F in the format code.
-Try entering nonsensical or partial values in validated fields to see what happens (use ctrl-s to test the valid status)."""
-            label2 = "\nNote that the State and Last Name fields are list-limited (Name:Smith,Jones,Williams)."
-
-            self.label1 = wx.StaticText( self.panel, -1, label)
-            self.label2 = wx.StaticText( self.panel, -1, "Description")
-            self.label3 = wx.StaticText( self.panel, -1, "Mask Value")
-            self.label4 = wx.StaticText( self.panel, -1, "Format")
-            self.label5 = wx.StaticText( self.panel, -1, "Reg Expr Val. (opt)")
-            self.label6 = wx.StaticText( self.panel, -1, "MaskedEdit Ctrl")
-            self.label7 = wx.StaticText( self.panel, -1, label2)
-            self.label7.SetForegroundColour("Blue")
-            self.label1.SetForegroundColour("Blue")
-            self.label2.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label3.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label4.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label5.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label6.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-
-            self.sizer.Add( self.label1, row=1,col=0,colspan=7, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label7, row=2,col=0,colspan=7, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label2, row=3,col=0, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label3, row=3,col=1, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label4, row=3,col=2, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label5, row=3,col=3, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label6, row=3,col=4, flag=wx.ALL,border=5)
-
-            # The following list is of the controls for the demo. Feel free to play around with
-            # the options!
-            controls = [
-            #description        mask                    excl format     regexp                              range,list,initial
-           ("Phone No",         "(###) ###-#### x:###", "", 'F!^-R',    "^\(\d\d\d\) \d\d\d-\d\d\d\d",    (),[],''),
-           ("Last Name Only",   "C{14}",                "", 'F {list}', '^[A-Z][a-zA-Z]+',                  (),('Smith','Jones','Williams'),''),
-           ("Full Name",        "C{14}",                "", 'F_',       '^[A-Z][a-zA-Z]+ [A-Z][a-zA-Z]+',   (),[],''),
-           ("Social Sec#",      "###-##-####",          "", 'F',        "\d{3}-\d{2}-\d{4}",                (),[],''),
-           ("U.S. Zip+4",       "#{5}-#{4}",            "", 'F',        "\d{5}-(\s{4}|\d{4})",(),[],''),
-           ("U.S. State (2 char)\n(with default)","AA",                 "", 'F!',       "[A-Z]{2}",                         (),states, 'AZ'),
-           ("Customer No",      "\CAA-###",              "", 'F!',      "C[A-Z]{2}-\d{3}",                   (),[],''),
-           ("Date (MDY) + Time\n(with default)",      "##/##/#### ##:## AM",  'BCDEFGHIJKLMNOQRSTUVWXYZ','DFR!',"",                (),[], r'03/05/2003 12:00 AM'),
-           ("Invoice Total",    "#{9}.##",              "", 'F-R,',     "",                                 (),[], ''),
-           ("Integer (signed)\n(with default)", "#{6}",                 "", 'F-R',      "",                                 (),[], '0     '),
-           ("Integer (unsigned)\n(with default), 1-399", "######",      "", 'F',        "",                                 (1,399),[], '1     '),
-           ("Month selector",   "XXX",                  "", 'F',        "",                                 (),
-                ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],""),
-           ("fraction selector","#/##",                 "", 'F',        "^\d\/\d\d?",                       (),
-                ['2/3', '3/4', '1/2', '1/4', '1/8', '1/16', '1/32', '1/64'], "")
-           ]
-
-            for control in controls:
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[0]),row=rowcount, col=0,border=5,flag=wx.ALL)
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[1]),row=rowcount, col=1,border=5, flag=wx.ALL)
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[3]),row=rowcount, col=2,border=5, flag=wx.ALL)
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[4][:20]),row=rowcount, col=3,border=5, flag=wx.ALL)
-
-                if control in controls[:]:#-2]:
-                    newControl  = MaskedTextCtrl( self.panel, -1, "",
-                                                    mask         = control[1],
-                                                    excludeChars = control[2],
-                                                    formatcodes  = control[3],
-                                                    includeChars = "",
-                                                    validRegex   = control[4],
-                                                    validRange   = control[5],
-                                                    choices      = control[6],
-                                                    defaultValue = control[7],
-                                                    demo         = True)
-                    if control[6]: newControl.SetCtrlParameters(choiceRequired = True)
-                else:
-                    newControl = MaskedComboBox(  self.panel, -1, "",
-                                                    choices = control[7],
-                                                    choiceRequired  = True,
-                                                    mask         = control[1],
-                                                    formatcodes  = control[3],
-                                                    excludeChars = control[2],
-                                                    includeChars = "",
-                                                    validRegex   = control[4],
-                                                    validRange   = control[5],
-                                                    demo         = True)
-                self.editList.append( newControl )
-
-                self.sizer.Add( newControl, row=rowcount,col=4,flag=wx.ALL,border=5)
-                rowcount += 1
-
-            self.sizer.AddGrowableCol(4)
-
-            self.panel.SetSizer(self.sizer)
-            self.panel.SetAutoLayout(1)
-
-            self.frame.Show(1)
-            self.MainLoop()
-
-            return True
-
-        def onClick(self, event):
-            self.frame.Close()
-
-        def onClickPage(self, event):
-            self.page2 = __test2(self.frame,-1,"")
-            self.page2.Show(True)
-
-        def _onCheck1(self,event):
-            """ Set required value on/off """
-            value = event.IsChecked()
-            if value:
-                for control in self.editList:
-                    control.SetCtrlParameters(emptyInvalid=True)
-                    control.Refresh()
-            else:
-                for control in self.editList:
-                    control.SetCtrlParameters(emptyInvalid=False)
-                    control.Refresh()
-            self.panel.Refresh()
-
-        def _onCheck2(self,event):
-            """ Highlight empty values"""
-            value = event.IsChecked()
-            if value:
-                for control in self.editList:
-                    control.SetCtrlParameters( emptyBackgroundColour = 'Aquamarine')
-                    control.Refresh()
-            else:
-                for control in self.editList:
-                    control.SetCtrlParameters( emptyBackgroundColour = 'White')
-                    control.Refresh()
-            self.panel.Refresh()
-
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-class __test2(wx.Frame):
-        def __init__(self, parent, id, caption):
-            wx.Frame.__init__( self, parent, id, "MaskedEdit control 0.0.7 Demo Page #2 -- AutoFormats", size = (550,600))
-            from wx.lib.rcsizer import RowColSizer
-            self.panel = wx.Panel( self, -1)
-            self.sizer = RowColSizer()
-            self.labels = []
-            self.texts  = []
-            rowcount    = 4
-
-            label = """\
-All these controls have been created by passing a single parameter, the AutoFormat code.
-The class contains an internal dictionary of types and formats (autoformats).
-To see a great example of validations in action, try entering a bad email address, then tab out."""
-
-            self.label1 = wx.StaticText( self.panel, -1, label)
-            self.label2 = wx.StaticText( self.panel, -1, "Description")
-            self.label3 = wx.StaticText( self.panel, -1, "AutoFormat Code")
-            self.label4 = wx.StaticText( self.panel, -1, "MaskedEdit Control")
-            self.label1.SetForegroundColour("Blue")
-            self.label2.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label3.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-            self.label4.SetFont(wx.Font(9,wx.SWISS,wx.NORMAL,wx.BOLD))
-
-            self.sizer.Add( self.label1, row=1,col=0,colspan=3, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label2, row=3,col=0, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label3, row=3,col=1, flag=wx.ALL,border=5)
-            self.sizer.Add( self.label4, row=3,col=2, flag=wx.ALL,border=5)
-
-            id, id1 = wx.NewId(), wx.NewId()
-            self.command1  = wx.Button( self.panel, id, "&Close")
-            self.command2  = wx.Button( self.panel, id1, "&Print Formats")
-            self.panel.Bind(wx.EVT_BUTTON, self.onClick, self.command1)
-            self.panel.SetDefaultItem(self.command1)
-            self.panel.Bind(wx.EVT_BUTTON, self.onClickPrint, self.command2)
-
-            # The following list is of the controls for the demo. Feel free to play around with
-            # the options!
-            controls = [
-           ("Phone No","USPHONEFULLEXT"),
-           ("US Date + Time","USDATETIMEMMDDYYYY/HHMM"),
-           ("US Date MMDDYYYY","USDATEMMDDYYYY/"),
-           ("Time (with seconds)","TIMEHHMMSS"),
-           ("Military Time\n(without seconds)","24HRTIMEHHMM"),
-           ("Social Sec#","USSOCIALSEC"),
-           ("Credit Card","CREDITCARD"),
-           ("Expiration MM/YY","EXPDATEMMYY"),
-           ("Percentage","PERCENT"),
-           ("Person's Age","AGE"),
-           ("US Zip Code","USZIP"),
-           ("US Zip+4","USZIPPLUS4"),
-           ("Email Address","EMAIL"),
-           ("IP Address", "(derived control IpAddrCtrl)")
-           ]
-
-            for control in controls:
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[0]),row=rowcount, col=0,border=5,flag=wx.ALL)
-                self.sizer.Add( wx.StaticText( self.panel, -1, control[1]),row=rowcount, col=1,border=5, flag=wx.ALL)
-                if control in controls[:-1]:
-                    self.sizer.Add( MaskedTextCtrl( self.panel, -1, "",
-                                                      autoformat  = control[1],
-                                                      demo        = True),
-                                row=rowcount,col=2,flag=wx.ALL,border=5)
-                else:
-                    self.sizer.Add( IpAddrCtrl( self.panel, -1, "", demo=True ),
-                                    row=rowcount,col=2,flag=wx.ALL,border=5)
-                rowcount += 1
-
-            self.sizer.Add(self.command1, row=0, col=0, flag=wx.ALL, border = 5)
-            self.sizer.Add(self.command2, row=0, col=1, flag=wx.ALL, border = 5)
-            self.sizer.AddGrowableCol(3)
-
-            self.panel.SetSizer(self.sizer)
-            self.panel.SetAutoLayout(1)
-
-        def onClick(self, event):
-            self.Close()
-
-        def onClickPrint(self, event):
-            for format in masktags.keys():
-                sep = "+------------------------+"
-                print "%s\n%s  \n  Mask: %s \n  RE Validation string: %s\n" % (sep,format, masktags[format]['mask'], masktags[format]['validRegex'])
-
-## ---------- ---------- ---------- ---------- ---------- ---------- ----------
-
-if __name__ == "__main__":
-    app = __test(False)
-
-__i=0
-##
-## Current Issues:
-## ===================================
-##
-## 1. WS: For some reason I don't understand, the control is generating two (2)
-##      EVT_TEXT events for every one (1) .SetValue() of the underlying control.
-##      I've been unsuccessful in determining why or in my efforts to make just one
-##      occur.  So, I've added a hack to save the last seen value from the
-##      control in the EVT_TEXT handler, and if *different*, call event.Skip()
-##      to propagate it down the event chain, and let the application see it.
-##
-## 2. WS: MaskedComboBox is deficient in several areas, all having to do with the
-##      behavior of the underlying control that I can't fix.  The problems are:
-##      a) The background coloring doesn't work in the text field of the control;
-##         instead, there's a only border around it that assumes the correct color.
-##      b) The control will not pass WXK_TAB to the event handler, no matter what
-##         I do, and there's no style wxCB_PROCESS_TAB like wxTE_PROCESS_TAB to
-##         indicate that we want these events.  As a result, MaskedComboBox
-##         doesn't do the nice field-tabbing that MaskedTextCtrl does.
-##      c) Auto-complete had to be reimplemented for the control because programmatic
-##         setting of the value of the text field does not set up the auto complete
-##         the way that the control processing keystrokes does.  (But I think I've
-##         implemented a fairly decent approximation.)  Because of this the control
-##         also won't auto-complete on dropdown, and there's no event I can catch
-##         to work around this problem.
-##      d) There is no method provided for getting the selection; the hack I've
-##         implemented has its flaws, not the least of which is that due to the
-##         strategy that I'm using, the paste buffer is always replaced by the
-##         contents of the control's selection when in focus, on each keystroke;
-##         this makes it impossible to paste anything into a MaskedComboBox
-##         at the moment... :-(
-##      e) The other deficient behavior, likely induced by the workaround for (d),
-##         is that you can can't shift-left to select more than one character
-##         at a time.
-##
-##
-## 3. WS: Controls on wxPanels don't seem to pass Shift-WXK_TAB to their
-##      EVT_KEY_DOWN or EVT_CHAR event handlers.  Until this is fixed in
-##      wxWindows, shift-tab won't take you backwards through the fields of
-##      a MaskedTextCtrl like it should.  Until then Shifted arrow keys will
-##      work like shift-tab and tab ought to.
-##
-
-## To-Do's:
-## =============================##
-##  1. Add Popup list for auto-completable fields that simulates combobox on individual
-##     fields.  Example: City validates against list of cities, or zip vs zip code list.
-##  2. Allow optional monetary symbols (eg. $, pounds, etc.) at front of a "decimal"
-##     control.
-##  3. Fix shift-left selection for MaskedComboBox.
-##  5. Transform notion of "decimal control" to be less "entire control"-centric,
-##     so that monetary symbols can be included and still have the appropriate
-##     semantics.  (Big job, as currently written, but would make control even
-##     more useful for business applications.)
-
-
-## CHANGELOG:
-## ====================
-##  Version 1.13
-##  1. Added parameter option stopFieldChangeIfInvalid, which can be used to relax the 
-##     validation rules for a control, but make best efforts to stop navigation out of 
-##     that field should its current value be invalid.  Note: this does not prevent the 
-##     value from remaining invalid if focus for the control is lost, via mousing etc.
-##
-##  Version 1.12
-##  1. Added proper support for NUMPAD keypad keycodes for navigation and control.
-##
-##  Version 1.11
-##  1. Added value member to ValueError exceptions, so that people can catch them
-##     and then display their own errors, and added attribute raiseOnInvalidPaste,
-##     so one doesn't have to subclass the controls simply to force generation of
-##     a ValueError on a bad paste operation.
-##  2. Fixed handling of unicode charsets by converting to explicit control char
-##     set testing for passing those keystrokes to the base control, and then 
-##     changing the semantics of the * maskchar to indicate any visible char.
-##  3. Added '|' mask specification character, which allows splitting of contiguous
-##     mask characters into separate fields, allowing finer control of behavior
-##     of a control.
-##     
-##
-##  Version 1.10
-##  1. Added handling for WXK_DELETE and WXK_INSERT, such that shift-delete
-##     cuts, shift-insert pastes, and ctrl-insert copies.
-##
-##  Version 1.9
-##  1. Now ignores kill focus events when being destroyed.
-##  2. Added missing call to set insertion point on changing fields.
-##  3. Modified SetKeyHandler() to accept None as means of removing one.
-##  4. Fixed keyhandler processing for group and decimal character changes.
-##  5. Fixed a problem that prevented input into the integer digit of a 
-##     integerwidth=1 numctrl, if the current value was 0.
-##  6. Fixed logic involving processing of "_signOk" flag, to remove default
-##     sign key handlers if false, so that SetAllowNegative(False) in the
-##     NumCtrl works properly.
-##  7. Fixed selection logic for numeric controls so that if selectOnFieldEntry
-##     is true, and the integer portion of an integer format control is selected
-##     and the sign position is selected, the sign keys will always result in a
-##     negative value, rather than toggling the previous sign.
-##
-##
-##  Version 1.8
-##  1. Fixed bug involving incorrect variable name, causing combobox autocomplete to fail.
-##  2. Added proper support for unicode version of wxPython
-##  3. Added * as mask char meaning "all ansi chars" (ordinals 32-255).
-##  4. Converted doc strings to use reST format, for ePyDoc documentation.
-##  5. Renamed helper functions, classes, etc. not intended to be visible in public
-##     interface to code.
-##
-##  Version 1.7
-##  1. Fixed intra-right-insert-field erase, such that it doesn't leave a hole, but instead
-##     shifts the text to the left accordingly.
-##  2. Fixed _SetValue() to place cursor after last character inserted, rather than end of
-##     mask.
-##  3. Fixed some incorrect undo behavior for right-insert fields, and allowed derived classes
-##     (eg. numctrl) to pass modified values for undo processing (to handle/ignore grouping
-##     chars properly.)
-##  4. Fixed autoselect behavior to work similarly to (2) above, so that combobox
-##     selection will only select the non-empty text, as per request.
-##  5. Fixed tabbing to work with 2.5.2 semantics.
-##  6. Fixed size calculation to handle changing fonts
-##
-##  Version 1.6
-##  1. Reorganized masked controls into separate package, renamed things accordingly
-##  2. Split actual controls out of this file into their own files.
-##  Version 1.5
-##  (Reported) bugs fixed:
-##   1. Crash ensues if you attempt to change the mask of a read-only
-##      MaskedComboBox after initial construction.
-##   2. Changed strategy of defining Get/Set property functions so that
-##      these are now generated dynamically at runtime, rather than as
-##      part of the class definition.  (This makes it possible to have
-##      more general base classes that have many more options for configuration
-##      without requiring that derivations support the same options.)
-##   3. Fixed IsModified for _Paste() and _OnErase().
-##
-##   Enhancements:
-##   1. Fixed "attribute function inheritance," since base control is more
-##      generic than subsequent derivations, not all property functions of a
-##      generic control should be exposed in those derivations.  New strategy
-##      uses base control classes (eg. BaseMaskedTextCtrl) that should be
-##      used to derive new class types, and mixed with their own mixins to
-##      only expose those attributes from the generic masked controls that
-##      make sense for the derivation.  (This makes Boa happier.)
-##   2. Renamed (with b-c) MILTIME autoformats to 24HRTIME, so as to be less
-##      "parochial."
-##
-##  Version 1.4
-##  (Reported) bugs fixed:
-##   1. Right-click menu allowed "cut" operation that destroyed mask
-##      (was implemented by base control)
-##   2. MaskedComboBox didn't allow .Append() of mixed-case values; all
-##      got converted to lower case.
-##   3. MaskedComboBox selection didn't deal with spaces in values
-##      properly when autocompleting, and didn't have a concept of "next"
-##      match for handling choice list duplicates.
-##   4. Size of MaskedComboBox was always default.
-##   5. Email address regexp allowed some "non-standard" things, and wasn't
-##      general enough.
-##   6. Couldn't easily reset MaskedComboBox contents programmatically.
-##   7. Couldn't set emptyInvalid during construction.
-##   8. Under some versions of wxPython, readonly comboboxes can apparently
-##      return a GetInsertionPoint() result (655535), causing masked control
-##      to fail.
-##   9. Specifying an empty mask caused the controls to traceback.
-##  10. Can't specify float ranges for validRange.
-##  11. '.' from within a the static portion of a restricted IP address
-##      destroyed the mask from that point rightward; tab when cursor is
-##      before 1st field takes cursor past that field.
-##
-##  Enhancements:
-##  12. Added Ctrl-Z/Undo handling, (and implemented context-menu properly.)
-##  13. Added auto-select option on char input for masked controls with
-##      choice lists.
-##  14. Added '>' formatcode, allowing insert within a given or each field
-##      as appropriate, rather than requiring "overwrite".  This makes single
-##      field controls that just have validation rules (eg. EMAIL) much more
-##      friendly.  The same flag controls left shift when deleting vs just
-##      blanking the value, and for right-insert fields, allows right-insert
-##      at any non-blank (non-sign) position in the field.
-##  15. Added option to use to indicate negative values for numeric controls.
-##  16. Improved OnFocus handling of numeric controls.
-##  17. Enhanced Home/End processing to allow operation on a field level,
-##      using ctrl key.
-##  18. Added individual Get/Set functions for control parameters, for
-##      simplified integration with Boa Constructor.
-##  19. Standardized "Colour" parameter names to match wxPython, with
-##      non-british spellings still supported for backward-compatibility.
-##  20. Added '&' mask specification character for punctuation only (no letters
-##      or digits).
-##  21. Added (in a separate file) wx.MaskedCtrl() factory function to provide
-##      unified interface to the masked edit subclasses.
-##
-##
-##  Version 1.3
-##   1. Made it possible to configure grouping, decimal and shift-decimal characters,
-##      to make controls more usable internationally.
-##   2. Added code to smart "adjust" value strings presented to .SetValue()
-##      for right-aligned numeric format controls if they are shorter than
-##      than the control width,  prepending the missing portion, prepending control
-##      template left substring for the missing characters, so that setting
-##      numeric values is easier.
-##   3. Renamed SetMaskParameters SetCtrlParameters() (with old name preserved
-##      for b-c), as this makes more sense.
-##
-##  Version 1.2
-##   1. Fixed .SetValue() to replace the current value, rather than the current
-##      selection. Also changed it to generate ValueError if presented with
-##      either a value which doesn't follow the format or won't fit.  Also made
-##      set value adjust numeric and date controls as if user entered the value.
-##      Expanded doc explaining how SetValue() works.
-##   2. Fixed EUDATE* autoformats, fixed IsDateType mask list, and added ability to
-##      use 3-char months for dates, and EUDATETIME, and EUDATEMILTIME autoformats.
-##   3. Made all date autoformats automatically pick implied "datestyle".
-##   4. Added IsModified override, since base wx.TextCtrl never reports modified if
-##      .SetValue used to change the value, which is what the masked edit controls
-##      use internally.
-##   5. Fixed bug in date position adjustment on 2 to 4 digit date conversion when
-##      using tab to "leave field" and auto-adjust.
-##   6. Fixed bug in _isCharAllowed() for negative number insertion on pastes,
-##      and bug in ._Paste() that didn't account for signs in signed masks either.
-##   7. Fixed issues with _adjustPos for right-insert fields causing improper
-##      selection/replacement of values
-##   8. Fixed _OnHome handler to properly handle extending current selection to
-##      beginning of control.
-##   9. Exposed all (valid) autoformats to demo, binding descriptions to
-##      autoformats.
-##  10. Fixed a couple of bugs in email regexp.
-##  11. Made maskchardict an instance var, to make mask chars to be more
-##      amenable to international use.
-##  12. Clarified meaning of '-' formatcode in doc.
-##  13. Fixed a couple of coding bugs being flagged by Python2.1.
-##  14. Fixed several issues with sign positioning, erasure and validity
-##      checking for "numeric" masked controls.
-##  15. Added validation to IpAddrCtrl.SetValue().
-##
-##  Version 1.1
-##   1. Changed calling interface to use boolean "useFixedWidthFont" (True by default)
-##      vs. literal font facename, and use wxTELETYPE as the font family
-##      if so specified.
-##   2. Switched to use of dbg module vs. locally defined version.
-##   3. Revamped entire control structure to use Field classes to hold constraint
-##      and formatting data, to make code more hierarchical, allow for more
-##      sophisticated masked edit construction.
-##   4. Better strategy for managing options, and better validation on keywords.
-##   5. Added 'V' format code, which requires that in order for a character
-##      to be accepted, it must result in a string that passes the validRegex.
-##   6. Added 'S' format code which means "select entire field when navigating
-##      to new field."
-##   7. Added 'r' format code to allow "right-insert" fields. (implies 'R'--right-alignment)
-##   8. Added '<' format code to allow fields to require explicit cursor movement
-##      to leave field.
-##   9. Added validFunc option to other validation mechanisms, that allows derived
-##      classes to add dynamic validation constraints to the control.
-##  10. Fixed bug in validatePaste code causing possible IndexErrors, and also
-##      fixed failure to obey case conversion codes when pasting.
-##  11. Implemented '0' (zero-pad) formatting code, as it wasn't being done anywhere...
-##  12. Removed condition from OnDecimalPoint, so that it always truncates right on '.'
-##  13. Enhanced IpAddrCtrl to use right-insert fields, selection on field traversal,
-##      individual field validation to prevent field values > 255, and require explicit
-##      tab/. to change fields.
-##  14. Added handler for left double-click to select field under cursor.
-##  15. Fixed handling for "Read-only" styles.
-##  16. Separated signedForegroundColor from 'R' style, and added foregroundColor
-##      attribute, for more consistent and controllable coloring.
-##  17. Added retainFieldValidation parameter, allowing top-level constraints
-##      such as "validRequired" to be set independently of field-level equivalent.
-##      (needed in TimeCtrl for bounds constraints.)
-##  18. Refactored code a bit, cleaned up and commented code more heavily, fixed
-##      some of the logic for setting/resetting parameters, eg. fillChar, defaultValue,
-##      etc.
-##  19. Fixed maskchar setting for upper/lowercase, to work in all locales.
-##
-##
-##  Version 1.0
-##   1. Decimal point behavior restored for decimal and integer type controls:
-##      decimal point now trucates the portion > 0.
-##   2. Return key now works like the tab character and moves to the next field,
-##      provided no default button is set for the form panel on which the control
-##      resides.
-##   3. Support added in _FindField() for subclasses controls (like timecontrol)
-##      to determine where the current insertion point is within the mask (i.e.
-##      which sub-'field'). See method documentation for more info and examples.
-##   4. Added Field class and support for all constraints to be field-specific
-##      in addition to being globally settable for the control.
-##      Choices for each field are validated for length and pastability into
-##      the field in question, raising ValueError if not appropriate for the control.
-##      Also added selective additional validation based on individual field constraints.
-##      By default, SHIFT-WXK_DOWN, SHIFT-WXK_UP, WXK_PRIOR and WXK_NEXT all
-##      auto-complete fields with choice lists, supplying the 1st entry in
-##      the choice list if the field is empty, and cycling through the list in
-##      the appropriate direction if already a match.  WXK_DOWN will also auto-
-##      complete if the field is partially completed and a match can be made.
-##      SHIFT-WXK_UP/DOWN will also take you to the next field after any
-##      auto-completion performed.
-##   5. Added autoCompleteKeycodes=[] parameters for allowing further
-##      customization of the control.  Any keycode supplied as a member
-##      of the _autoCompleteKeycodes list will be treated like WXK_NEXT.  If
-##      requireFieldChoice is set, then a valid value from each non-empty
-##      choice list will be required for the value of the control to validate.
-##   6. Fixed "auto-sizing" to be relative to the font actually used, rather
-##      than making assumptions about character width.
-##   7. Fixed GetMaskParameter(), which was non-functional in previous version.
-##   8. Fixed exceptions raised to provide info on which control had the error.
-##   9. Fixed bug in choice management of MaskedComboBox.
-##  10. Fixed bug in IpAddrCtrl causing traceback if field value was of
-##     the form '# #'.  Modified control code for IpAddrCtrl so that '.'
-##     in the middle of a field clips the rest of that field, similar to
-##     decimal and integer controls.
-##
-##
-##  Version 0.0.7
-##   1. "-" is a toggle for sign; "+" now changes - signed numerics to positive.
-##   2. ',' in formatcodes now causes numeric values to be comma-delimited (e.g.333,333).
-##   3. New support for selecting text within the control.(thanks Will Sadkin!)
-##      Shift-End and Shift-Home now select text as you would expect
-##      Control-Shift-End selects to the end of the mask string, even if value not entered.
-##      Control-A selects all *entered* text, Shift-Control-A selects everything in the control.
-##   4. event.Skip() added to onKillFocus to correct remnants when running in Linux (contributed-
-##      for some reason I couldn't find the original email but thanks!!!)
-##   5. All major key-handling code moved to their own methods for easier subclassing: OnHome,
-##      OnErase, OnEnd, OnCtrl_X, OnCtrl_A, etc.
-##   6. Email and autoformat validations corrected using regex provided by Will Sadkin (thanks!).
-##   (The rest of the changes in this version were done by Will Sadkin with permission from Jeff...)
-##   7. New mechanism for replacing default behavior for any given key, using
-##      ._SetKeycodeHandler(keycode, func) and ._SetKeyHandler(char, func) now available
-##      for easier subclassing of the control.
-##   8. Reworked the delete logic, cut, paste and select/replace logic, as well as some bugs
-##      with insertion point/selection modification.  Changed Ctrl-X to use standard "cut"
-##      semantics, erasing the selection, rather than erasing the entire control.
-##   9. Added option for an "default value" (ie. the template) for use when a single fillChar
-##      is not desired in every position.  Added IsDefault() function to mean "does the value
-##      equal the template?" and modified .IsEmpty() to mean "do all of the editable
-##      positions in the template == the fillChar?"
-##  10. Extracted mask logic into mixin, so we can have both MaskedTextCtrl and MaskedComboBox,
-##      now included.
-##  11. MaskedComboBox now adds the capability to validate from list of valid values.
-##      Example: City validates against list of cities, or zip vs zip code list.
-##  12. Fixed oversight in EVT_TEXT handler that prevented the events from being
-##      passed to the next handler in the event chain, causing updates to the
-##      control to be invisible to the parent code.
-##  13. Added IPADDR autoformat code, and subclass IpAddrCtrl for controlling tabbing within
-##      the control, that auto-reformats as you move between cells.
-##  14. Mask characters [A,a,X,#] can now appear in the format string as literals, by using '\'.
-##  15. It is now possible to specify repeating masks, e.g. #{3}-#{3}-#{14}
-##  16. Fixed major bugs in date validation, due to the fact that
-##      wxDateTime.ParseDate is too liberal, and will accept any form that
-##      makes any kind of sense, regardless of the datestyle you specified
-##      for the control.  Unfortunately, the strategy used to fix it only
-##      works for versions of wxPython post 2.3.3.1, as a C++ assert box
-##      seems to show up on an invalid date otherwise, instead of a catchable
-##      exception.
-##  17. Enhanced date adjustment to automatically adjust heuristic based on
-##      current year, making last century/this century determination on
-##      2-digit year based on distance between today's year and value;
-##      if > 50 year separation, assume last century (and don't assume last
-##      century is 20th.)
-##  18. Added autoformats and support for including HHMMSS as well as HHMM for
-##      date times, and added similar time, and militaray time autoformats.
-##  19. Enhanced tabbing logic so that tab takes you to the next field if the
-##      control is a multi-field control.
-##  20. Added stub method called whenever the control "changes fields", that
-##      can be overridden by subclasses (eg. IpAddrCtrl.)
-##  21. Changed a lot of code to be more functionally-oriented so side-effects
-##      aren't as problematic when maintaining code and/or adding features.
-##      Eg: IsValid() now does not have side-effects; it merely reflects the
-##      validity of the value of the control; to determine validity AND recolor
-##      the control, _CheckValid() should be used with a value argument of None.
-##      Similarly, made most reformatting function take an optional candidate value
-##      rather than just using the current value of the control, and only
-##      have them change the value of the control if a candidate is not specified.
-##      In this way, you can do validation *before* changing the control.
-##  22. Changed validRequired to mean "disallow chars that result in invalid
-##      value."  (Old meaning now represented by emptyInvalid.)  (This was
-##      possible once I'd made the changes in (19) above.)
-##  23. Added .SetMaskParameters and .GetMaskParameter methods, so they
-##      can be set/modified/retrieved after construction.  Removed individual
-##      parameter setting functions, in favor of this mechanism, so that
-##      all adjustment of the control based on changing parameter values can
-##      be handled in one place with unified mechanism.
-##  24. Did a *lot* of testing and fixing re: numeric values.  Added ability
-##      to type "grouping char" (ie. ',') and validate as appropriate.
-##  25. Fixed ZIPPLUS4 to allow either 5 or 4, but if > 5 must be 9.
-##  26. Fixed assumption about "decimal or integer" masks so that they're only
-##      made iff there's no validRegex associated with the field.  (This
-##      is so things like zipcodes which look like integers can have more
-##      restrictive validation (ie. must be 5 digits.)
-##  27. Added a ton more doc strings to explain use and derivation requirements
-##      and did regularization of the naming conventions.
-##  28. Fixed a range bug in _adjustKey preventing z from being handled properly.
-##  29. Changed behavior of '.' (and shift-.) in numeric controls to move to
-##      reformat the value and move the next field as appropriate. (shift-'.',
-##      ie. '>' moves to the previous field.
-
-##  Version 0.0.6
-##   1. Fixed regex bug that caused autoformat AGE to invalidate any age ending
-##      in '0'.
-##   2. New format character 'D' to trigger date type. If the user enters 2 digits in the
-##      year position, the control will expand the value to four digits, using numerals below
-##      50 as 21st century (20+nn) and less than 50 as 20th century (19+nn).
-##      Also, new optional parameter datestyle = set to one of {MDY|DMY|YDM}
-##   3. revalid parameter renamed validRegex to conform to standard for all validation
-##      parameters (see 2 new ones below).
-##   4. New optional init parameter = validRange. Used only for int/dec (numeric) types.
-##      Allows the developer to specify a valid low/high range of values.
-##   5. New optional init parameter = validList. Used for character types. Allows developer
-##      to send a list of values to the control to be used for specific validation.
-##      See the Last Name Only example - it is list restricted to Smith/Jones/Williams.
-##   6. Date type fields now use wxDateTime's parser to validate the date and time.
-##      This works MUCH better than my kludgy regex!! Thanks to Robin Dunn for pointing
-##      me toward this solution!
-##   7. Date fields now automatically expand 2-digit years when it can. For example,
-##      if the user types "03/10/67", then "67" will auto-expand to "1967". If a two-year
-##      date is entered it will be expanded in any case when the user tabs out of the
-##      field.
-##   8. New class functions: SetValidBackgroundColor, SetInvalidBackgroundColor, SetEmptyBackgroundColor,
-##      SetSignedForeColor allow accessto override default class coloring behavior.
-##   9. Documentation updated and improved.
-##  10. Demo - page 2 is now a wxFrame class instead of a wxPyApp class. Works better.
-##      Two new options (checkboxes) - test highlight empty and disallow empty.
-##  11. Home and End now work more intuitively, moving to the first and last user-entry
-##      value, respectively.
-##  12. New class function: SetRequired(bool). Sets the control's entry required flag
-##      (i.e. disallow empty values if True).
-##
-##  Version 0.0.5
-##   1. get_plainValue method renamed to GetPlainValue following the wxWindows
-##      StudlyCaps(tm) standard (thanks Paul Moore).  ;)
-##   2. New format code 'F' causes the control to auto-fit (auto-size) itself
-##      based on the length of the mask template.
-##   3. Class now supports "autoformat" codes. These can be passed to the class
-##      on instantiation using the parameter autoformat="code". If the code is in
-##      the dictionary, it will self set the mask, formatting, and validation string.
-##      I have included a number of samples, but I am hoping that someone out there
-##      can help me to define a whole bunch more.
-##   4. I have added a second page to the demo (as well as a second demo class, test2)
-##      to showcase how autoformats work. The way they self-format and self-size is,
-##      I must say, pretty cool.
-##   5. Comments added and some internal cosmetic revisions re: matching the code
-##      standards for class submission.
-##   6. Regex validation is now done in real time - field turns yellow immediately
-##      and stays yellow until the entered value is valid
-##   7. Cursor now skips over template characters in a more intuitive way (before the
-##      next keypress).
-##   8. Change, Keypress and LostFocus methods added for convenience of subclasses.
-##      Developer may use these methods which will be called after EVT_TEXT, EVT_CHAR,
-##      and EVT_KILL_FOCUS, respectively.
-##   9. Decimal and numeric handlers have been rewritten and now work more intuitively.
-##
-##  Version 0.0.4
-##   1. New .IsEmpty() method returns True if the control's value is equal to the
-##      blank template string
-##   2. Control now supports a new init parameter: revalid. Pass a regular expression
-##      that the value will have to match when the control loses focus. If invalid,
-##      the control's BackgroundColor will turn yellow, and an internal flag is set (see next).
-##   3. Demo now shows revalid functionality. Try entering a partial value, such as a
-##      partial social security number.
-##   4. New .IsValid() value returns True if the control is empty, or if the value matches
-##      the revalid expression. If not, .IsValid() returns False.
-##   5. Decimal values now collapse to decimal with '.00' on losefocus if the user never
-##      presses the decimal point.
-##   6. Cursor now goes to the beginning of the field if the user clicks in an
-##      "empty" field intead of leaving the insertion point in the middle of the
-##      field.
-##   7. New "N" mask type includes upper and lower chars plus digits. a-zA-Z0-9.
-##   8. New formatcodes init parameter replaces other init params and adds functions.
-##      String passed to control on init controls:
-##        _ Allow spaces
-##        ! Force upper
-##        ^ Force lower
-##        R Show negative #s in red
-##        , Group digits
-##        - Signed numerals
-##        0 Numeric fields get leading zeros
-##   9. Ctrl-X in any field clears the current value.
-##   10. Code refactored and made more modular (esp in OnChar method). Should be more
-##       easy to read and understand.
-##   11. Demo enhanced.
-##   12. Now has _doc_.
-##
-##  Version 0.0.3
-##   1. GetPlainValue() now returns the value without the template characters;
-##      so, for example, a social security number (123-33-1212) would return as
-##      123331212; also removes white spaces from numeric/decimal values, so
-##      "-   955.32" is returned "-955.32". Press ctrl-S to see the plain value.
-##   2. Press '.' in an integer style masked control and truncate any trailing digits.
-##   3. Code moderately refactored. Internal names improved for clarity. Additional
-##      internal documentation.
-##   4. Home and End keys now supported to move cursor to beginning or end of field.
-##   5. Un-signed integers and decimals now supported.
-##   6. Cosmetic improvements to the demo.
-##   7. Class renamed to MaskedTextCtrl.
-##   8. Can now specify include characters that will override the basic
-##      controls: for example, includeChars = "@." for email addresses
-##   9. Added mask character 'C' -> allow any upper or lowercase character
-##   10. .SetSignColor(str:color) sets the foreground color for negative values
-##       in signed controls (defaults to red)
-##   11. Overview documentation written.
-##
-##  Version 0.0.2
-##   1. Tab now works properly when pressed in last position
-##   2. Decimal types now work (e.g. #####.##)
-##   3. Signed decimal or numeric values supported (i.e. negative numbers)
-##   4. Negative decimal or numeric values now can show in red.
-##   5. Can now specify an "exclude list" with the excludeChars parameter.
-##      See date/time formatted example - you can only enter A or P in the
-##      character mask space (i.e. AM/PM).
-##   6. Backspace now works properly, including clearing data from a selected
-##      region but leaving template characters intact. Also delete key.
-##   7. Left/right arrows now work properly.
-##   8. Removed EventManager call from test so demo should work with wxPython 2.3.3
-##