A little cleanup

[wxWidgets.git] / wxPython / demo / Main.py

#!/bin/env python
#----------------------------------------------------------------------------
# Name:         Main.py
# Purpose:      Testing lots of stuff, controls, window types, etc.
#
# Author:       Robin Dunn
#
# Created:      A long time ago, in a galaxy far, far away...
# RCS-ID:       $Id$
# Copyright:    (c) 1999 by Total Control Software
# Licence:      wxWindows license
#----------------------------------------------------------------------------

# FIXME List:
# * Problems with flickering related to ERASE_BACKGROUND
#     and the splitters. Might be a problem with this 2.5 beta...?
#     UPDATE: can't see on 2.5.2 GTK - maybe just a faster machine :)
# * Demo Code menu?
# * Annoying switching between tabs and resulting flicker
#     how to replace a page in the notebook without deleting/adding?
#     Where is SetPage!? tried freeze...tried reparent of dummy panel....

# TODO List:
# * UI design more prefessional
# * save file positions (new field in demoModules) (@ LoadDemoSource)
# * Update main overview

# * Why don't we move _treeList into a separate module

import sys, os, time, traceback, types

import wx                  # This module uses the new wx namespace
import wx.html

import images

# For debugging
##wx.Trap();
##print "wx.VERSION_STRING = ", wx.VERSION_STRING
##print os.getpid();
##raw_input("Press Enter...")


#---------------------------------------------------------------------------


_treeList = [
    # new stuff
    ('Recent Additions/Updates', [
        'FoldPanelBar',
        'GIFAnimationCtrl',
        'HyperLinkCtrl',
        ]),

    # managed windows == things with a (optional) caption you can close
    ('Frames and Dialogs', [
        'Dialog',
        'Frame',
        'MDIWindows',
        'MiniFrame',
        'Wizard',
        ]),

    # the common dialogs
    ('Common Dialogs', [
        'ColourDialog',
        'DirDialog',
        'FileDialog',
        'FindReplaceDialog',
        'FontDialog',
        'MessageDialog',
        'MultiChoiceDialog',
        'PageSetupDialog',
        'PrintDialog',
        'ProgressDialog',
        'SingleChoiceDialog',
        'TextEntryDialog',
        ]),

    # dialogs from libraries
    ('More Dialogs', [
        'ImageBrowser',
        'MultipleChoiceDialog',
        'ScrolledMessageDialog',
        ]),

    # core controls
    ('Core Windows/Controls', [
        'BitmapButton',
        'Button',
        'CheckBox',
        'CheckListBox',
        'Choice',
        'Choicebook',
        'ComboBox',
        'Gauge',
        'Grid',
        'Grid_MegaExample',
        'ListBox',
        'ListCtrl',
        'ListCtrl_virtual',
        'ListCtrl_edit',
        'Listbook',
        'Menu',
        'Notebook',
        'PopupMenu',
        'PopupWindow',
        'RadioBox',
        'RadioButton',
        'SashWindow',
        'ScrolledWindow',
        'Slider',
        'SpinButton',
        'SpinCtrl',
        'SplitterWindow',
        'StaticBitmap',
        'StaticBox',
        'StaticText',
        'StatusBar',
        'StockButtons',
        'TextCtrl',
        'ToggleButton',
        'ToolBar',
        'TreeCtrl',
        'Validator',
        ]),

    ('Custom Controls', [
        'AnalogClockWindow',
        'ColourSelect',
        'Editor',
        'GenericButtons',
        'GenericDirCtrl',
        'LEDNumberCtrl',
        'MultiSash',
        'PopupControl',
        'PyColourChooser',
        'TreeListCtrl',
    ]),
    
    # controls coming from other libraries
    ('More Windows/Controls', [
        'ActiveX_FlashWindow',
        'ActiveX_IEHtmlWindow',
        'ActiveX_PDFWindow',
        #'RightTextCtrl',     deprecated as we have wxTE_RIGHT now.
        'Calendar',
        'CalendarCtrl',
        'ContextHelp',
        'DatePickerCtrl',
        'DynamicSashWindow',
        'EditableListBox',
        'FancyText',
        'FileBrowseButton',
        'FloatBar',  
        'FloatCanvas',
        'FoldPanelBar',
        'GIFAnimationCtrl',
        'HtmlWindow',
        'HyperLinkCtrl',
        'IntCtrl',
        'MediaCtrl',
        'MVCTree',   
        'MaskedEditControls',
        'MaskedNumCtrl',
        'MimeTypesManager',
        'PyCrust',
        'PyPlot',
        'PyShell',
        'ScrolledPanel',
        'SplitTree',
        'StyledTextCtrl_1',
        'StyledTextCtrl_2',
        'TablePrint',
        'Throbber',
        'Ticker',
        'TimeCtrl',
        'VListBox',
        ]),

    # How to lay out the controls in a frame/dialog
    ('Window Layout', [
        'GridBagSizer',
        'LayoutAnchors',
        'LayoutConstraints',
        'Layoutf',
        'RowColSizer',
        'ScrolledPanel',
        'Sizers',
        'XmlResource',
        'XmlResourceHandler',
        'XmlResourceSubclass',
        ]),

    # ditto
    ('Process and Events', [
        'EventManager',
        'KeyEvents',
        'Process',
        'PythonEvents',
        'Threads',
        'Timer',
        ##'infoframe',    # needs better explanation and some fixing
        ]),

    # Clipboard and DnD
    ('Clipboard and DnD', [
        'CustomDragAndDrop',
        'DragAndDrop',
        'URLDragAndDrop',
        ]),

    # Images
    ('Using Images', [
        'ArtProvider',
        'Cursor',
        'DragImage',
        'GIFAnimationCtrl',
        'Image',
        'ImageAlpha',
        'ImageFromStream',
        'Mask',
        'Throbber',
        ]),

    # Other stuff
    ('Miscellaneous', [
        'ColourDB',
        ##'DialogUnits',   # needs more explanations
        'DrawXXXList',
        'FileHistory',
        'FontEnumerator',
        'Joystick',
        'MouseGestures',
        'OGL',
        'PrintFramework',
        'ShapedWindow',
        'Sound',
        'StandardPaths',
        'Unicode',
        ]),

    # need libs not coming with the demo
    ('Samples using an external library', [
        'GLCanvas',
        ]),


    ('Check out the samples dir too', [
        ]),

]



#---------------------------------------------------------------------------
# Show how to derive a custom wxLog class

class MyLog(wx.PyLog):
    def __init__(self, textCtrl, logTime=0):
        wx.PyLog.__init__(self)
        self.tc = textCtrl
        self.logTime = logTime

    def DoLogString(self, message, timeStamp):
        #print message, timeStamp
        #if self.logTime:
        #    message = time.strftime("%X", time.localtime(timeStamp)) + \
        #              ": " + message
        if self.tc:
            self.tc.AppendText(message + '\n')


class MyTP(wx.PyTipProvider):
    def GetTip(self):
        return "This is my tip"

#---------------------------------------------------------------------------
# A class to be used to simply display a message in the demo pane
# rather than running the sample itself.

class MessagePanel(wx.Panel):
    def __init__(self, parent, message, caption='', flags=0):
        wx.Panel.__init__(self, parent)

        # Make widgets
        if flags:
            artid = None
            if flags & wx.ICON_EXCLAMATION:
                artid = wx.ART_WARNING            
            elif flags & wx.ICON_ERROR:
                artid = wx.ART_ERROR
            elif flags & wx.ICON_QUESTION:
                artid = wx.ART_QUESTION
            elif flags & wx.ICON_INFORMATION:
                artid = wx.ART_INFORMATION

            if artid is not None:
                bmp = wx.ArtProvider.GetBitmap(artid, wx.ART_MESSAGE_BOX, (32,32))
                icon = wx.StaticBitmap(self, -1, bmp)
            else:
                icon = (32,32) # make a spacer instead

        if caption:
            caption = wx.StaticText(self, -1, caption)
            caption.SetFont(wx.Font(28, wx.SWISS, wx.NORMAL, wx.BOLD))

        message = wx.StaticText(self, -1, message)

        # add to sizers for layout
        tbox = wx.BoxSizer(wx.VERTICAL)
        if caption:
            tbox.Add(caption)
            tbox.Add((10,10))
        tbox.Add(message)
        
        hbox = wx.BoxSizer(wx.HORIZONTAL)
        hbox.Add((10,10), 1)
        hbox.Add(icon)
        hbox.Add((10,10))
        hbox.Add(tbox)
        hbox.Add((10,10), 1)

        box = wx.BoxSizer(wx.VERTICAL)
        box.Add((10,10), 1)
        box.Add(hbox, 0, wx.EXPAND)
        box.Add((10,10), 2)

        self.SetSizer(box)
        self.Fit()
        

#---------------------------------------------------------------------------
# A class to be used to display source code in the demo.  Try using the
# wxSTC in the StyledTextCtrl_2 sample first, fall back to wxTextCtrl
# if there is an error, such as the stc module not being present.
#

try:
    ##raise ImportError     # for testing the alternate implementation
    from wx import stc
    from StyledTextCtrl_2 import PythonSTC

    class DemoCodeEditor(PythonSTC):
        def __init__(self, parent):
            PythonSTC.__init__(self, parent, -1, style=wx.BORDER_NONE)
            self.SetUpEditor()

        # Some methods to make it compatible with how the wxTextCtrl is used
        def SetValue(self, value):
            if wx.USE_UNICODE:
                value = value.decode('iso8859_1')
            self.SetText(value)
            self.EmptyUndoBuffer()
            self.SetSavePoint()

        def IsModified(self):
            return self.GetModify()

        def Clear(self):
            self.ClearAll()

        def SetInsertionPoint(self, pos):
            self.SetCurrentPos(pos)
            self.SetAnchor(pos)

        def ShowPosition(self, pos):
            line = self.LineFromPosition(pos)
            #self.EnsureVisible(line)
            self.GotoLine(line)

        def GetLastPosition(self):
            return self.GetLength()

        def GetPositionFromLine(self, line):
            return self.PositionFromLine(line)

        def GetRange(self, start, end):
            return self.GetTextRange(start, end)

        def GetSelection(self):
            return self.GetAnchor(), self.GetCurrentPos()

        def SetSelection(self, start, end):
            self.SetSelectionStart(start)
            self.SetSelectionEnd(end)

        def SelectLine(self, line):
            start = self.PositionFromLine(line)
            end = self.GetLineEndPosition(line)
            self.SetSelection(start, end)
            
        def SetUpEditor(self):
            """
            This method carries out the work of setting up the demo editor.            
            It's seperate so as not to clutter up the init code.
            """
            import keyword
            
            self.SetLexer(stc.STC_LEX_PYTHON)
            self.SetKeyWords(0, " ".join(keyword.kwlist))
    
            # Enable folding
            self.SetProperty("fold", "1" ) 

            # Highlight tab/space mixing (shouldn't be any)
            self.SetProperty("tab.timmy.whinge.level", "1")

            # Set left and right margins
            self.SetMargins(2,2)
    
            # Set up the numbers in the margin for margin #1
            self.SetMarginType(1, wx.stc.STC_MARGIN_NUMBER)
            # Reasonable value for, say, 4-5 digits using a mono font (40 pix)
            self.SetMarginWidth(1, 40)
    
            # Indentation and tab stuff
            self.SetIndent(4)               # Proscribed indent size for wx
            self.SetIndentationGuides(True) # Show indent guides
            self.SetBackSpaceUnIndents(True)# Backspace unindents rather than delete 1 space
            self.SetTabIndents(True)        # Tab key indents
            self.SetTabWidth(4)             # Proscribed tab size for wx
            self.SetUseTabs(False)          # Use spaces rather than tabs, or
                                            # TabTimmy will complain!    
            # White space
            self.SetViewWhiteSpace(False)   # Don't view white space
    
            # EOL: Since we are loading/saving ourselves, and the
            # strings will always have \n's in them, set the STC to
            # edit them that way.            
            self.SetEOLMode(wx.stc.STC_EOL_LF)
            self.SetViewEOL(False)
            
            # No right-edge mode indicator
            self.SetEdgeMode(stc.STC_EDGE_NONE)
    
            # Setup a margin to hold fold markers
            self.SetMarginType(2, stc.STC_MARGIN_SYMBOL)
            self.SetMarginMask(2, stc.STC_MASK_FOLDERS)
            self.SetMarginSensitive(2, True)
            self.SetMarginWidth(2, 12)
    
            # and now set up the fold markers
            self.MarkerDefine(stc.STC_MARKNUM_FOLDEREND,     stc.STC_MARK_BOXPLUSCONNECTED,  "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDEROPENMID, stc.STC_MARK_BOXMINUSCONNECTED, "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDERMIDTAIL, stc.STC_MARK_TCORNER,  "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDERTAIL,    stc.STC_MARK_LCORNER,  "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDERSUB,     stc.STC_MARK_VLINE,    "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDER,        stc.STC_MARK_BOXPLUS,  "white", "black")
            self.MarkerDefine(stc.STC_MARKNUM_FOLDEROPEN,    stc.STC_MARK_BOXMINUS, "white", "black")
    
            # Global default style
            if wx.Platform == '__WXMSW__':
                self.StyleSetSpec(stc.STC_STYLE_DEFAULT, 
                                  'fore:#000000,back:#FFFFFF,face:Courier New,size:9')
            else:
                self.StyleSetSpec(stc.STC_STYLE_DEFAULT, 
                                  'fore:#000000,back:#FFFFFF,face:Courier,size:12')
    
            # Clear styles and revert to default.
            self.StyleClearAll()

            # Following style specs only indicate differences from default.
            # The rest remains unchanged.

            # Line numbers in margin
            self.StyleSetSpec(wx.stc.STC_STYLE_LINENUMBER,'fore:#000000,back:#99A9C2')    
            # Highlighted brace
            self.StyleSetSpec(wx.stc.STC_STYLE_BRACELIGHT,'fore:#00009D,back:#FFFF00')
            # Unmatched brace
            self.StyleSetSpec(wx.stc.STC_STYLE_BRACEBAD,'fore:#00009D,back:#FF0000')
            # Indentation guide
            self.StyleSetSpec(wx.stc.STC_STYLE_INDENTGUIDE, "fore:#CDCDCD")
    
            # Python styles
            self.StyleSetSpec(wx.stc.STC_P_DEFAULT, 'fore:#000000')
            # Comments
            self.StyleSetSpec(wx.stc.STC_P_COMMENTLINE,  'fore:#008000,back:#F0FFF0')
            self.StyleSetSpec(wx.stc.STC_P_COMMENTBLOCK, 'fore:#008000,back:#F0FFF0')
            # Numbers
            self.StyleSetSpec(wx.stc.STC_P_NUMBER, 'fore:#008080')
            # Strings and characters
            self.StyleSetSpec(wx.stc.STC_P_STRING, 'fore:#800080')
            self.StyleSetSpec(wx.stc.STC_P_CHARACTER, 'fore:#800080')
            # Keywords
            self.StyleSetSpec(wx.stc.STC_P_WORD, 'fore:#000080,bold')
            # Triple quotes
            self.StyleSetSpec(wx.stc.STC_P_TRIPLE, 'fore:#800080,back:#FFFFEA')
            self.StyleSetSpec(wx.stc.STC_P_TRIPLEDOUBLE, 'fore:#800080,back:#FFFFEA')
            # Class names
            self.StyleSetSpec(wx.stc.STC_P_CLASSNAME, 'fore:#0000FF,bold')
            # Function names
            self.StyleSetSpec(wx.stc.STC_P_DEFNAME, 'fore:#008080,bold')
            # Operators
            self.StyleSetSpec(wx.stc.STC_P_OPERATOR, 'fore:#800000,bold')
            # Identifiers. I leave this as not bold because everything seems
            # to be an identifier if it doesn't match the above criterae
            self.StyleSetSpec(wx.stc.STC_P_IDENTIFIER, 'fore:#000000')

            # Caret color
            self.SetCaretForeground("BLUE")
            # Selection background
            self.SetSelBackground(1, '#66CCFF')

            self.SetSelBackground(True, wx.SystemSettings_GetColour(wx.SYS_COLOUR_HIGHLIGHT))
            self.SetSelForeground(True, wx.SystemSettings_GetColour(wx.SYS_COLOUR_HIGHLIGHTTEXT))

        def RegisterModifiedEvent(self, eventHandler):
            self.Bind(wx.stc.EVT_STC_CHANGE, eventHandler)


except ImportError:
    class DemoCodeEditor(wx.TextCtrl):
        def __init__(self, parent):
            wx.TextCtrl.__init__(self, parent, -1, style =
                                 wx.TE_MULTILINE | wx.HSCROLL | wx.TE_RICH2 | wx.TE_NOHIDESEL)

        def RegisterModifiedEvent(self, eventHandler):
            self.Bind(wx.EVT_TEXT, eventHandler)

        def SetReadOnly(self, flag):
            self.SetEditable(not flag)
            # NOTE: STC already has this method
    
        def GetText(self):
            return self.GetValue()

        def GetPositionFromLine(self, line):
            return self.XYToPosition(0,line)

        def GotoLine(self, line):
            pos = self.GetPositionFromLine(line)
            self.SetInsertionPoint(pos)
            self.ShowPosition(pos)

        def SelectLine(self, line):
            start = self.GetPositionFromLine(line)
            end = start + self.GetLineLength(line)
            self.SetSelection(start, end)


#---------------------------------------------------------------------------
# Constants for module versions

modOriginal = 0
modModified = 1
modDefault = modOriginal

#---------------------------------------------------------------------------

class DemoCodePanel(wx.Panel):
    """Panel for the 'Demo Code' tab"""
    def __init__(self, parent, mainFrame):
        wx.Panel.__init__(self, parent, size=(1,1))
        if 'wxMSW' in wx.PlatformInfo:
            self.Hide()
        self.mainFrame = mainFrame
        self.editor = DemoCodeEditor(self)
        self.editor.RegisterModifiedEvent(self.OnCodeModified)

        self.btnSave = wx.Button(self, -1, "Save Changes")
        self.btnRestore = wx.Button(self, -1, "Delete Modified")
        self.btnSave.Enable(False)
        self.btnSave.Bind(wx.EVT_BUTTON, self.OnSave)
        self.btnRestore.Bind(wx.EVT_BUTTON, self.OnRestore)

        self.radioButtons = { modOriginal: wx.RadioButton(self, -1, "Original", style = wx.RB_GROUP),
                              modModified: wx.RadioButton(self, -1, "Modified") }

        self.controlBox = wx.BoxSizer(wx.HORIZONTAL)
        self.controlBox.Add(wx.StaticText(self, -1, "Active Version:"), 0,
                            wx.RIGHT | wx.LEFT | wx.ALIGN_CENTER_VERTICAL, 5)
        for modID, radioButton in self.radioButtons.items():
            self.controlBox.Add(radioButton, 0, wx.EXPAND | wx.RIGHT, 5)
            radioButton.modID = modID # makes it easier for the event handler
            radioButton.Bind(wx.EVT_RADIOBUTTON, self.OnRadioButton)
            
        self.controlBox.Add(self.btnSave, 0, wx.RIGHT, 5)
        self.controlBox.Add(self.btnRestore, 0)

        self.box = wx.BoxSizer(wx.VERTICAL)
        self.box.Add(self.controlBox, 0, wx.EXPAND)
        self.box.Add(wx.StaticLine(self), 0, wx.EXPAND)
        self.box.Add(self.editor, 1, wx.EXPAND)
        
        self.box.Fit(self)
        self.SetSizer(self.box)


    # Loads a demo from a DemoModules object
    def LoadDemo(self, demoModules):
        self.demoModules = demoModules
        if (modDefault == modModified) and demoModules.Exists(modModified):
            demoModules.SetActive(modModified)
        else:
            demoModules.SetActive(modOriginal)
        self.radioButtons[demoModules.GetActiveID()].Enable(True)
        self.ActiveModuleChanged()


    def ActiveModuleChanged(self):
        self.LoadDemoSource(self.demoModules.GetSource())
        self.UpdateControlState()
        self.ReloadDemo()

        
    def LoadDemoSource(self, source):
        self.editor.Clear()
        self.editor.SetValue(source)
        self.JumpToLine(0)
        self.btnSave.Enable(False)


    def JumpToLine(self, line, highlight=False):
        self.editor.GotoLine(line)
        self.editor.SetFocus()
        if highlight:
            self.editor.SelectLine(line)
        
       
    def UpdateControlState(self):
        active = self.demoModules.GetActiveID()
        # Update the radio/restore buttons
        for moduleID in self.radioButtons:
            btn = self.radioButtons[moduleID]
            if moduleID == active:
                btn.SetValue(True)
            else:
                btn.SetValue(False)

            if self.demoModules.Exists(moduleID):
                btn.Enable(True)
                if moduleID == modModified:
                    self.btnRestore.Enable(True)
            else:
                btn.Enable(False)
                if moduleID == modModified:
                    self.btnRestore.Enable(False)

                    
    def OnRadioButton(self, event):
        radioSelected = event.GetEventObject()
        modSelected = radioSelected.modID
        if modSelected != self.demoModules.GetActiveID():
            busy = wx.BusyInfo("Reloading demo module...")
            self.demoModules.SetActive(modSelected)
            self.ActiveModuleChanged()


    def ReloadDemo(self):
        if self.demoModules.name != __name__:
            self.mainFrame.RunModule()

                
    def OnCodeModified(self, event):
        self.btnSave.Enable(self.editor.IsModified())

        
    def OnSave(self, event):
        if self.demoModules.Exists(modModified):
            if self.demoModules.GetActiveID() == modOriginal:
                overwriteMsg = "You are about to overwrite an already existing modified copy\n" + \
                               "Do you want to continue?"
                dlg = wx.MessageDialog(self, overwriteMsg, "wxPython Demo",
                                       wx.YES_NO | wx.NO_DEFAULT| wx.ICON_EXCLAMATION)
                result = dlg.ShowModal()
                if result == wx.ID_NO:
                    return
                dlg.Destroy()
            
        self.demoModules.SetActive(modModified)
        modifiedFilename = GetModifiedFilename(self.demoModules.name)

        # Create the demo directory if one doesn't already exist
        if not os.path.exists(GetModifiedDirectory()):
            try:
                os.makedirs(GetModifiedDirectory())
                if not os.path.exists(GetModifiedDirectory()):
                    wx.LogMessage("BUG: Created demo directory but it still doesn't exist")
                    raise AssetionError
            except:
                wx.LogMessage("Error creating demo directory: %s" % GetModifiedDirectory())
                return
            else:
                wx.LogMessage("Created directory for modified demos: %s" % GetModifiedDirectory())
            
        # Save
        f = open(modifiedFilename, "wt")
        source = self.editor.GetText()
        try:
            f.write(source)
        finally:
            f.close()
            
        busy = wx.BusyInfo("Reloading demo module...")
        self.demoModules.LoadFromFile(modModified, modifiedFilename)
        self.ActiveModuleChanged()


    def OnRestore(self, event): # Handles the "Delete Modified" button
        modifiedFilename = GetModifiedFilename(self.demoModules.name)
        self.demoModules.Delete(modModified)
        os.unlink(modifiedFilename) # Delete the modified copy
        busy = wx.BusyInfo("Reloading demo module...")
        self.ActiveModuleChanged()


#---------------------------------------------------------------------------

def opj(path):
    """Convert paths to the platform-specific separator"""
    str = apply(os.path.join, tuple(path.split('/')))
    # HACK: on Linux, a leading / gets lost...
    if path.startswith('/'):
        str = '/' + str
    return str


def GetModifiedDirectory():
    """
    Returns the directory where modified versions of the demo files
    are stored
    """
    return opj(wx.GetHomeDir() + "/.wxPyDemo/modified/")


def GetModifiedFilename(name):
    """
    Returns the filename of the modified version of the specified demo
    """
    if not name.endswith(".py"):
        name = name + ".py"
    return GetModifiedDirectory() + name


def GetOriginalFilename(name):
    """
    Returns the filename of the original version of the specified demo
    """
    if not name.endswith(".py"):
        name = name + ".py"
    return name


def DoesModifiedExist(name):
    """Returns whether the specified demo has a modified copy"""
    if os.path.exists(GetModifiedFilename(name)):
        return True
    else:
        return False


#---------------------------------------------------------------------------

class ModuleDictWrapper:
    """Emulates a module with a dynamically compiled __dict__"""
    def __init__(self, dict):
        self.dict = dict
        
    def __getattr__(self, name):
        if name in self.dict:
            return self.dict[name]
        else:
            raise AttributeError

class DemoModules:
    """
    Dynamically manages the original/modified versions of a demo
    module
    """
    def __init__(self, name):
        self.modActive = -1
        self.name = name
        
        #              (dict , source ,  filename , description   , error information )        
        #              (  0  ,   1    ,     2     ,      3        ,          4        )        
        self.modules = [[None,  ""    ,    ""     , "<original>"  ,        None],
                        [None,  ""    ,    ""     , "<modified>"  ,        None]]
        
        # load original module
        self.LoadFromFile(modOriginal, GetOriginalFilename(name))
        self.SetActive(modOriginal)

        # load modified module (if one exists)
        if DoesModifiedExist(name):
           self.LoadFromFile(modModified, GetModifiedFilename(name))


    def LoadFromFile(self, modID, filename):
        self.modules[modID][2] = filename
        file = open(filename, "rt")
        self.LoadFromSource(modID, file.read())
        file.close()


    def LoadFromSource(self, modID, source):
        self.modules[modID][1] = source
        self.LoadDict(modID)


    def LoadDict(self, modID):
        if self.name != __name__:
            source = self.modules[modID][1]
            description = self.modules[modID][3]

            try:
                self.modules[modID][0] = {}
                code = compile(source, description, "exec")        
                exec code in self.modules[modID][0]
            except:
                self.modules[modID][4] = DemoError(sys.exc_info())
                self.modules[modID][0] = None
            else:
                self.modules[modID][4] = None


    def SetActive(self, modID):
        if modID != modOriginal and modID != modModified:
            raise LookupError
        else:
            self.modActive = modID


    def GetActive(self):
        dict = self.modules[self.modActive][0]
        if dict is None:
            return None
        else:
            return ModuleDictWrapper(dict)


    def GetActiveID(self):
        return self.modActive

    
    def GetSource(self, modID = None):
        if modID is None:
            modID = self.modActive
        return self.modules[modID][1]


    def GetFilename(self, modID = None):
        if modID is None:
            modID = self.modActive
        return self.modules[self.modActive][2]


    def GetErrorInfo(self, modID = None):
        if modID is None:
            modID = self.modActive
        return self.modules[self.modActive][4]


    def Exists(self, modID):
        return self.modules[modID][1] != ""


    def UpdateFile(self, modID = None):
        """Updates the file from which a module was loaded
        with (possibly updated) source"""
        if modID is None:
            modID = self.modActive

        source = self.modules[modID][1]
        filename = self.modules[modID][2]

        try:        
            file = open(filename, "wt")
            file.write(source)
        finally:
            file.close()


    def Delete(self, modID):
        if self.modActive == modID:
            self.SetActive(0)

        self.modules[modID][0] = None
        self.modules[modID][1] = ""
        self.modules[modID][2] = ""


#---------------------------------------------------------------------------

class DemoError:
    """Wraps and stores information about the current exception"""
    def __init__(self, exc_info):
        import copy
        
        excType, excValue = exc_info[:2]
        # traceback list entries: (filename, line number, function name, text)
        self.traceback = traceback.extract_tb(exc_info[2])

        # --Based on traceback.py::format_exception_only()--
        if type(excType) == types.ClassType:
            self.exception_type = excType.__name__
        else:
            self.exception_type = excType

        # If it's a syntax error, extra information needs
        # to be added to the traceback
        if excType is SyntaxError:
            try:
                msg, (filename, lineno, self.offset, line) = excValue
            except:
                pass
            else:
                if not filename:
                    filename = "<string>"
                line = line.strip()
                self.traceback.append( (filename, lineno, "", line) )
                excValue = msg
        try:
            self.exception_details = str(excValue)
        except:
            self.exception_details = "<unprintable %s object>" & type(excValue).__name__

        del exc_info
        
    def __str__(self):
        ret = "Type %s \n \
        Traceback: %s \n \
        Details  : %s" % ( str(self.exception_type), str(self.traceback), self.exception_details )
        return ret

#---------------------------------------------------------------------------

class DemoErrorPanel(wx.Panel):
    """Panel put into the demo tab when the demo fails to run due  to errors"""

    def __init__(self, parent, codePanel, demoError, log):
        wx.Panel.__init__(self, parent, -1)#, style=wx.NO_FULL_REPAINT_ON_RESIZE)
        self.codePanel = codePanel
        self.nb = parent
        self.log = log

        self.box = wx.BoxSizer(wx.VERTICAL)

        # Main Label
        self.box.Add(wx.StaticText(self, -1, "An error has occurred while trying to run the demo")
                     , 0, wx.ALIGN_CENTER | wx.TOP, 10)

        # Exception Information
        boxInfo      = wx.StaticBox(self, -1, "Exception Info" )
        boxInfoSizer = wx.StaticBoxSizer(boxInfo, wx.VERTICAL ) # Used to center the grid within the box
        boxInfoGrid  = wx.FlexGridSizer(0, 2, 0, 0)
        textFlags    = wx.ALIGN_RIGHT | wx.LEFT | wx.RIGHT | wx.TOP
        boxInfoGrid.Add(wx.StaticText(self, -1, "Type: "), 0, textFlags, 5 )
        boxInfoGrid.Add(wx.StaticText(self, -1, demoError.exception_type) , 0, textFlags, 5 )
        boxInfoGrid.Add(wx.StaticText(self, -1, "Details: ") , 0, textFlags, 5 )
        boxInfoGrid.Add(wx.StaticText(self, -1, demoError.exception_details) , 0, textFlags, 5 )
        boxInfoSizer.Add(boxInfoGrid, 0, wx.ALIGN_CENTRE | wx.ALL, 5 )
        self.box.Add(boxInfoSizer, 0, wx.ALIGN_CENTER | wx.ALL, 5)
       
        # Set up the traceback list
        # This one automatically resizes last column to take up remaining space
        from ListCtrl import TestListCtrl
        self.list = TestListCtrl(self, -1, style=wx.LC_REPORT  | wx.SUNKEN_BORDER)
        self.list.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
        self.list.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected)
        self.list.InsertColumn(0, "Filename")
        self.list.InsertColumn(1, "Line", wx.LIST_FORMAT_RIGHT)
        self.list.InsertColumn(2, "Function")
        self.list.InsertColumn(3, "Code")
        self.InsertTraceback(self.list, demoError.traceback)
        self.list.SetColumnWidth(0, wx.LIST_AUTOSIZE)
        self.list.SetColumnWidth(2, wx.LIST_AUTOSIZE)
        self.box.Add(wx.StaticText(self, -1, "Traceback:")
                     , 0, wx.ALIGN_CENTER | wx.TOP, 5)
        self.box.Add(self.list, 1, wx.GROW | wx.ALIGN_CENTER | wx.ALL, 5)
        self.box.Add(wx.StaticText(self, -1, "Entries from the demo module are shown in blue\n"
                                           + "Double-click on them to go to the offending line")
                     , 0, wx.ALIGN_CENTER | wx.BOTTOM, 5)

        self.box.Fit(self)
        self.SetSizer(self.box)


    def InsertTraceback(self, list, traceback):
        #Add the traceback data
        for x in range(len(traceback)):
            data = traceback[x]
            list.InsertStringItem(x, os.path.basename(data[0])) # Filename
            list.SetStringItem(x, 1, str(data[1]))              # Line
            list.SetStringItem(x, 2, str(data[2]))              # Function
            list.SetStringItem(x, 3, str(data[3]))              # Code
            
            # Check whether this entry is from the demo module
            if data[0] == "<original>" or data[0] == "<modified>": # FIXME: make more generalised
                self.list.SetItemData(x, int(data[1]))   # Store line number for easy access
                # Give it a blue colour
                item = self.list.GetItem(x)
                item.SetTextColour(wx.BLUE)
                self.list.SetItem(item)
            else:
                self.list.SetItemData(x, -1)        # Editor can't jump into this one's code
       

    def OnItemSelected(self, event):
        # This occurs before OnDoubleClick and can be used to set the
        # currentItem. OnDoubleClick doesn't get a wxListEvent....
        self.currentItem = event.m_itemIndex
        event.Skip()

        
    def OnDoubleClick(self, event):
        # If double-clicking on a demo's entry, jump to the line number
        line = self.list.GetItemData(self.currentItem)
        if line != -1:
            self.nb.SetSelection(1) # Switch to the code viewer tab
            wx.CallAfter(self.codePanel.JumpToLine, line-1, True)
        event.Skip()
        

#---------------------------------------------------------------------------

class DemoTaskBarIcon(wx.TaskBarIcon):
    TBMENU_RESTORE = wx.NewId()
    TBMENU_CLOSE   = wx.NewId()
    TBMENU_CHANGE  = wx.NewId()
    TBMENU_REMOVE  = wx.NewId()
    
    def __init__(self, frame):
        wx.TaskBarIcon.__init__(self)
        self.frame = frame

        # Set the image
        icon = self.MakeIcon(images.getWXPdemoImage())
        self.SetIcon(icon, "wxPython Demo")
        self.imgidx = 1
        
        # bind some events
        self.Bind(wx.EVT_TASKBAR_LEFT_DCLICK, self.OnTaskBarActivate)
        self.Bind(wx.EVT_MENU, self.OnTaskBarActivate, id=self.TBMENU_RESTORE)
        self.Bind(wx.EVT_MENU, self.OnTaskBarClose, id=self.TBMENU_CLOSE)
        self.Bind(wx.EVT_MENU, self.OnTaskBarChange, id=self.TBMENU_CHANGE)
        self.Bind(wx.EVT_MENU, self.OnTaskBarRemove, id=self.TBMENU_REMOVE)


    def CreatePopupMenu(self):
        """
        This method is called by the base class when it needs to popup
        the menu for the default EVT_RIGHT_DOWN event.  Just create
        the menu how you want it and return it from this function,
        the base class takes care of the rest.
        """
        menu = wx.Menu()
        menu.Append(self.TBMENU_RESTORE, "Restore wxPython Demo")
        menu.Append(self.TBMENU_CLOSE,   "Close wxPython Demo")
        menu.AppendSeparator()
        menu.Append(self.TBMENU_CHANGE, "Change the TB Icon")
        menu.Append(self.TBMENU_REMOVE, "Remove the TB Icon")
        return menu


    def MakeIcon(self, img):
        """
        The various platforms have different requirements for the
        icon size...
        """
        if "wxMSW" in wx.PlatformInfo:
            img = img.Scale(16, 16)
        elif "wxGTK" in wx.PlatformInfo:
            img = img.Scale(22, 22)
        # wxMac can be any size upto 128x128, so leave the source img alone....
        icon = wx.IconFromBitmap(img.ConvertToBitmap() )
        return icon
    

    def OnTaskBarActivate(self, evt):
        if self.frame.IsIconized():
            self.frame.Iconize(False)
        if not self.frame.IsShown():
            self.frame.Show(True)
        self.frame.Raise()


    def OnTaskBarClose(self, evt):
        self.frame.Close()


    def OnTaskBarChange(self, evt):
        names = [ "WXPdemo", "Mondrian", "Pencil", "Carrot" ]                  
        name = names[self.imgidx]
        
        getFunc = getattr(images, "get%sImage" % name)
        self.imgidx += 1
        if self.imgidx >= len(names):
            self.imgidx = 0
            
        icon = self.MakeIcon(getFunc())
        self.SetIcon(icon, "This is a new icon: " + name)


    def OnTaskBarRemove(self, evt):
        self.RemoveIcon()


#---------------------------------------------------------------------------
class wxPythonDemo(wx.Frame):
    overviewText = "wxPython Overview"

    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, -1, title, size = (950, 720),
                          style=wx.DEFAULT_FRAME_STYLE | wx.NO_FULL_REPAINT_ON_RESIZE)

        self.SetMinSize((640,480))

        self.loaded = False
        self.cwd = os.getcwd()
        self.curOverview = ""
        self.demoPage = None
        self.codePage = None
        self.shell = None
        self.firstTime = True
        self.finddlg = None

        icon = images.getWXPdemoIcon()
        self.SetIcon(icon)

        self.tbicon = DemoTaskBarIcon(self)

        wx.CallAfter(self.ShowTip)

        self.otherWin = None
        self.Bind(wx.EVT_IDLE, self.OnIdle)
        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)
        self.Bind(wx.EVT_ICONIZE, self.OnIconfiy)
        self.Bind(wx.EVT_MAXIMIZE, self.OnMaximize)

        self.Centre(wx.BOTH)
        self.CreateStatusBar(1, wx.ST_SIZEGRIP)

        splitter = wx.SplitterWindow(self, -1, style=wx.CLIP_CHILDREN | wx.SP_LIVE_UPDATE | wx.SP_3D)
        splitter2 = wx.SplitterWindow(splitter, -1, style=wx.CLIP_CHILDREN | wx.SP_LIVE_UPDATE | wx.SP_3D)

        def EmptyHandler(evt): pass
        #splitter.Bind(wx.EVT_ERASE_BACKGROUND, EmptyHandler)
        #splitter2.Bind(wx.EVT_ERASE_BACKGROUND, EmptyHandler)

        # Prevent TreeCtrl from displaying all items after destruction when True
        self.dying = False

        # Create a Notebook
        self.nb = wx.Notebook(splitter2, -1, style=wx.CLIP_CHILDREN)

        # Make a File menu
        self.mainmenu = wx.MenuBar()
        menu = wx.Menu()
        item = menu.Append(-1, '&Redirect Output',
                           'Redirect print statements to a window',
                           wx.ITEM_CHECK)
        self.Bind(wx.EVT_MENU, self.OnToggleRedirect, item)
 
        item = menu.Append(-1, 'E&xit\tAlt-X', 'Get the heck outta here!')
        self.Bind(wx.EVT_MENU, self.OnFileExit, item)
        wx.App.SetMacExitMenuItemId(item.GetId())
        self.mainmenu.Append(menu, '&File')

        # Make a Demo menu
        menu = wx.Menu()
        for item in _treeList:
            submenu = wx.Menu()
            for childItem in item[1]:
                mi = submenu.Append(-1, childItem)
                self.Bind(wx.EVT_MENU, self.OnDemoMenu, mi)
            menu.AppendMenu(wx.NewId(), item[0], submenu)
        self.mainmenu.Append(menu, '&Demo')

        # Make a Demo Code menu
        #TODO: Add new menu items
        #       Like the option-enabled entries to select the
        #       active module
        #TODO: should we bother?

        #menu = wx.Menu()
        #saveID = wx.NewId()
        #restoreID = wx.NewId()
       # 
        #menu.Append(saveID, '&Save\tCtrl-S', 'Save edited demo')
        #menu.Append(restoreID, '&Delete Modified\tCtrl-R', 'Delete modified copy')
        #self.Bind(wx.EVT_MENU, self.codePage.OnSave, id=saveID)
        #self.Bind(wx.EVT_MENU, self.codePage.OnRestore, id=restoreID)
        #self.mainmenu.Append(menu, 'Demo &Code')
       # 

        # Make a Help menu
        menu = wx.Menu()
        findItem = menu.Append(-1, '&Find\tCtrl-F', 'Find in the Demo Code')
        findnextItem = menu.Append(-1, 'Find &Next\tF3', 'Find Next')
        menu.AppendSeparator()

        shellItem = menu.Append(-1, 'Open Py&Shell Window\tF5',
                                'An interactive interpreter window with the demo app and frame objects in the namesapce')
        menu.AppendSeparator()
        helpItem = menu.Append(-1, '&About\tCtrl-H', 'wxPython RULES!!!')
        wx.App.SetMacAboutMenuItemId(helpItem.GetId())

        self.Bind(wx.EVT_MENU, self.OnOpenShellWindow, shellItem)
        self.Bind(wx.EVT_MENU, self.OnHelpAbout, helpItem)
        self.Bind(wx.EVT_MENU, self.OnHelpFind,  findItem)
        self.Bind(wx.EVT_MENU, self.OnFindNext,  findnextItem)
        self.Bind(wx.EVT_FIND, self.OnFind)
        self.Bind(wx.EVT_FIND_NEXT, self.OnFind)
        self.Bind(wx.EVT_FIND_CLOSE, self.OnFindClose)
        self.Bind(wx.EVT_UPDATE_UI, self.OnUpdateFindItems, findItem)
        self.Bind(wx.EVT_UPDATE_UI, self.OnUpdateFindItems, findnextItem)
        self.mainmenu.Append(menu, '&Help')
        self.SetMenuBar(self.mainmenu)

        self.finddata = wx.FindReplaceData()

        if 0:
            # This is another way to set Accelerators, in addition to
            # using the '\t<key>' syntax in the menu items.
            aTable = wx.AcceleratorTable([(wx.ACCEL_ALT,  ord('X'), exitID),
                                          (wx.ACCEL_CTRL, ord('H'), helpID),
                                          (wx.ACCEL_CTRL, ord('F'), findID),
                                          (wx.ACCEL_NORMAL, WXK_F3, findnextID)
                                          ])
            self.SetAcceleratorTable(aTable)


        # Create a TreeCtrl
        tID = wx.NewId()
        self.treeMap = {}
        self.tree = wx.TreeCtrl(splitter, tID, style =
                                wx.TR_DEFAULT_STYLE #| wx.TR_HAS_VARIABLE_ROW_HEIGHT
                               )

        root = self.tree.AddRoot("wxPython Overview")
        firstChild = None
        for item in _treeList:
            child = self.tree.AppendItem(root, item[0])
            if not firstChild: firstChild = child
            for childItem in item[1]:
                theDemo = self.tree.AppendItem(child, childItem)
                self.treeMap[childItem] = theDemo

        self.tree.Expand(root)
        self.tree.Expand(firstChild)
        self.tree.Bind(wx.EVT_TREE_ITEM_EXPANDED, self.OnItemExpanded, id=tID)
        self.tree.Bind(wx.EVT_TREE_ITEM_COLLAPSED, self.OnItemCollapsed, id=tID)
        self.tree.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, id=tID)
        self.tree.Bind(wx.EVT_LEFT_DOWN, self.OnTreeLeftDown)

        # Set up a wx.html.HtmlWindow on the Overview Notebook page
        # we put it in a panel first because there seems to be a
        # refresh bug of some sort (wxGTK) when it is directly in
        # the notebook...
        if 0:  # the old way
            self.ovr = wx.html.HtmlWindow(self.nb, -1, size=(400, 400))
            self.nb.AddPage(self.ovr, self.overviewText)

        else:  # hopefully I can remove this hacky code soon, see SF bug #216861
            panel = wx.Panel(self.nb, -1, style=wx.CLIP_CHILDREN)
            self.ovr = wx.html.HtmlWindow(panel, -1, size=(400, 400))
            self.nb.AddPage(panel, self.overviewText)

            def OnOvrSize(evt, ovr=self.ovr):
                ovr.SetSize(evt.GetSize())
            panel.Bind(wx.EVT_SIZE, OnOvrSize)
            panel.Bind(wx.EVT_ERASE_BACKGROUND, EmptyHandler)

        if "gtk2" in wx.PlatformInfo:
            self.ovr.SetStandardFonts()
        self.SetOverview(self.overviewText, mainOverview)


        # Set up a log window
        self.log = wx.TextCtrl(splitter2, -1,
                              style = wx.TE_MULTILINE|wx.TE_READONLY|wx.HSCROLL)

        # Set the wxWindows log target to be this textctrl
        #wx.Log_SetActiveTarget(wx.LogTextCtrl(self.log))

        # But instead of the above we want to show how to use our own wx.Log class
        wx.Log_SetActiveTarget(MyLog(self.log))
        
        # for serious debugging
        #wx.Log_SetActiveTarget(wx.LogStderr())
        #wx.Log_SetTraceMask(wx.TraceMessages)


        self.Bind(wx.EVT_ACTIVATE, self.OnActivate)
        wx.GetApp().Bind(wx.EVT_ACTIVATE_APP, self.OnAppActivate)

        # add the windows to the splitter and split it.
        splitter2.SplitHorizontally(self.nb, self.log, -160)
        splitter.SplitVertically(self.tree, splitter2, 200)

        splitter.SetMinimumPaneSize(120)
        splitter2.SetMinimumPaneSize(60)

        # Make the splitter on the right expand the top window when resized
        def SplitterOnSize(evt):
            splitter = evt.GetEventObject()
            sz = splitter.GetSize()
            splitter.SetSashPosition(sz.height - 160, False)
            evt.Skip()

        splitter2.Bind(wx.EVT_SIZE, SplitterOnSize)

        # select initial items
        self.nb.SetSelection(0)
        self.tree.SelectItem(root)

        # Load 'Main' module
        self.LoadDemo(self.overviewText)
        self.loaded = True

        # select some other initial module?
        if len(sys.argv) > 1:
            arg = sys.argv[1]
            if arg.endswith('.py'):
                arg = arg[:-3]
            selectedDemo = self.treeMap.get(arg, None)
            if selectedDemo:
                self.tree.SelectItem(selectedDemo)
                self.tree.EnsureVisible(selectedDemo)


    #---------------------------------------------
    def WriteText(self, text):
        if text[-1:] == '\n':
            text = text[:-1]
        wx.LogMessage(text)

    def write(self, txt):
        self.WriteText(txt)

    #---------------------------------------------
    def OnItemExpanded(self, event):
        item = event.GetItem()
        wx.LogMessage("OnItemExpanded: %s" % self.tree.GetItemText(item))
        event.Skip()

    #---------------------------------------------
    def OnItemCollapsed(self, event):
        item = event.GetItem()
        wx.LogMessage("OnItemCollapsed: %s" % self.tree.GetItemText(item))
        event.Skip()

    #---------------------------------------------
    def OnTreeLeftDown(self, event):
        # reset the overview text if the tree item is clicked on again
        pt = event.GetPosition();
        item, flags = self.tree.HitTest(pt)
        if item == self.tree.GetSelection():
            self.SetOverview(self.tree.GetItemText(item)+" Overview", self.curOverview)
        event.Skip()

    #---------------------------------------------
    def OnSelChanged(self, event):
        if self.dying or  not self.loaded:
            return

        item = event.GetItem()
        itemText = self.tree.GetItemText(item)
        self.LoadDemo(itemText)

    #---------------------------------------------
    def LoadDemo(self, demoName):
        try:
            wx.BeginBusyCursor()
            
            os.chdir(self.cwd)
            self.ShutdownDemoModule()

            if demoName == self.overviewText:
                # User selected the "wxPython Overview" node
                # ie: _this_ module
                # Changing the main window at runtime not yet supported...
                self.demoModules = DemoModules(__name__)
                self.SetOverview(self.overviewText, mainOverview)
                self.LoadDemoSource()
                self.UpdateNotebook(0)
            else:
                if os.path.exists(GetOriginalFilename(demoName)):
                    wx.LogMessage("Loading demo %s.py..." % demoName)
                    self.demoModules = DemoModules(demoName)
                    self.LoadDemoSource()
                    self.tree.Refresh()
                else:
                    self.SetOverview("wxPython", mainOverview)
                    self.codePage = None
                    self.UpdateNotebook(0)
        finally:
            wx.EndBusyCursor()

    #---------------------------------------------
    def LoadDemoSource(self):
        self.codePage = None
        self.codePage = DemoCodePanel(self.nb, self)
        self.codePage.LoadDemo(self.demoModules)
        
    #---------------------------------------------
    def RunModule(self):
        """Runs the active module"""

        module = self.demoModules.GetActive()
        self.ShutdownDemoModule()
        overviewText = ""
        
        # o The RunTest() for all samples must now return a window that can
        #   be palced in a tab in the main notebook.
        # o If an error occurs (or has occurred before) an error tab is created.
        
        if module is not None:
            wx.LogMessage("Running demo module...")
            if hasattr(module, "overview"):
                overviewText = module.overview

            try:
                self.demoPage = module.runTest(self, self.nb, self)
            except:
                self.demoPage = DemoErrorPanel(self.nb, self.codePage,
                                               DemoError(sys.exc_info()), self)

            assert self.demoPage is not None, "runTest must return a window!"
            
        else:
            # There was a previous error in compiling or exec-ing
            self.demoPage = DemoErrorPanel(self.nb, self.codePage,
                                           self.demoModules.GetErrorInfo(), self)
            
        self.SetOverview(self.demoModules.name + " Overview", overviewText)

        if self.firstTime:
            # cahnge to the demo page the first time a module is run
            self.UpdateNotebook(2)
            self.firstTime = False
        else:
            # otherwise just stay on the same tab in case the user has changed to another one
            self.UpdateNotebook()

    #---------------------------------------------
    def ShutdownDemoModule(self):
        if self.demoPage:
            # inform the window that it's time to quit if it cares
            if hasattr(self.demoPage, "ShutdownDemo"):
                self.demoPage.ShutdownDemo()
            wx.YieldIfNeeded() # in case the page has pending events
            self.demoPage = None
            
    #---------------------------------------------
    def UpdateNotebook(self, select = -1):
        nb = self.nb
        debug = False
        
        def UpdatePage(page, pageText):
            pageExists = False
            pagePos = -1
            for i in range(nb.GetPageCount()):
                if nb.GetPageText(i) == pageText:
                    pageExists = True
                    pagePos = i
                    break
                
            if page:
                if not pageExists:
                    # Add a new page
                    nb.AddPage(page, pageText)
                    if debug: wx.LogMessage("DBG: ADDED %s" % pageText)
                else:
                    if nb.GetPage(pagePos) != page:
                        # Reload an existing page
                        nb.Freeze()
                        nb.DeletePage(pagePos)
                        nb.InsertPage(pagePos, page, pageText)
                        nb.Thaw()
                        if debug: wx.LogMessage("DBG: RELOADED %s" % pageText)
                    else:
                        # Excellent! No redraw/flicker
                        if debug: wx.LogMessage("DBG: SAVED from reloading %s" % pageText)
            elif pageExists:
                # Delete a page
                nb.DeletePage(pagePos)
                if debug: wx.LogMessage("DBG: DELETED %s" % pageText)
            else:
                if debug: wx.LogMessage("DBG: STILL GONE - %s" % pageText)
                
        if select == -1:
            select = nb.GetSelection()

        UpdatePage(self.codePage, "Demo Code")
        UpdatePage(self.demoPage, "Demo")

        if select >= 0 and select < nb.GetPageCount():
            nb.SetSelection(select)
            
    #---------------------------------------------
    def SetOverview(self, name, text):
        self.curOverview = text
        lead = text[:6]
        if lead != '<html>' and lead != '<HTML>':
            text = '<br>'.join(text.split('\n'))
        if wx.USE_UNICODE:
            text = text.decode('iso8859_1')  
        self.ovr.SetPage(text)
        self.nb.SetPageText(0, name)

    #---------------------------------------------
    # Menu methods
    def OnFileExit(self, *event):
        self.Close()

    def OnToggleRedirect(self, event):
        app = wx.GetApp()
        if event.Checked():
            app.RedirectStdio()
            print "Print statements and other standard output will now be directed to this window."
        else:
            app.RestoreStdio()
            print "Print statements and other standard output will now be sent to the usual location."
 
    def OnHelpAbout(self, event):
        from About import MyAboutBox
        about = MyAboutBox(self)
        about.ShowModal()
        about.Destroy()

    def OnHelpFind(self, event):
        if self.finddlg != None:
            return
        
        self.nb.SetSelection(1)
        self.finddlg = wx.FindReplaceDialog(self, self.finddata, "Find",
                        wx.FR_NOUPDOWN |
                        wx.FR_NOMATCHCASE |
                        wx.FR_NOWHOLEWORD)
        self.finddlg.Show(True)


    def OnUpdateFindItems(self, evt):
        evt.Enable(self.finddlg == None)


    def OnFind(self, event):
        editor = self.codePage.editor
        self.nb.SetSelection(1)
        end = editor.GetLastPosition()
        textstring = editor.GetRange(0, end).lower()
        start = editor.GetSelection()[1]
        findstring = self.finddata.GetFindString().lower()
        loc = textstring.find(findstring, start)
        if loc == -1 and start != 0:
            # string not found, start at beginning
            start = 0
            loc = textstring.find(findstring, start)
        if loc == -1:
            dlg = wx.MessageDialog(self, 'Find String Not Found',
                          'Find String Not Found in Demo File',
                          wx.OK | wx.ICON_INFORMATION)
            dlg.ShowModal()
            dlg.Destroy()
        if self.finddlg:
            if loc == -1:
                self.finddlg.SetFocus()
                return
            else:
                self.finddlg.Destroy()
                self.finddlg = None
        editor.ShowPosition(loc)
        editor.SetSelection(loc, loc + len(findstring))



    def OnFindNext(self, event):
        if self.finddata.GetFindString():
            self.OnFind(event)
        else:
            self.OnHelpFind(event)

    def OnFindClose(self, event):
        event.GetDialog().Destroy()
        self.finddlg = None


    def OnOpenShellWindow(self, evt):
        if self.shell:
            # if it already exists then just make sure it's visible
            s = self.shell
            if s.IsIconized():
                s.Iconize(False)
            s.Raise()
        else:
            # Make a PyShell window
            from wx import py
            namespace = { 'wx'    : wx,
                          'app'   : wx.GetApp(),
                          'frame' : self,
                          }
            self.shell = py.shell.ShellFrame(None, locals=namespace)
            self.shell.SetSize((640,480))
            self.shell.Show()

            # Hook the close event of the main frame window so that we
            # close the shell at the same time if it still exists            
            def CloseShell(evt):
                if self.shell:
                    self.shell.Close()
                evt.Skip()
            self.Bind(wx.EVT_CLOSE, CloseShell)

        
    #---------------------------------------------
    def OnCloseWindow(self, event):
        self.dying = True
        self.demoPage = None
        self.codePage = None
        self.mainmenu = None
        self.tbicon.Destroy()
        self.Destroy()


    #---------------------------------------------
    def OnIdle(self, event):
        if self.otherWin:
            self.otherWin.Raise()
            self.demoPage = self.otherWin
            self.otherWin = None


    #---------------------------------------------
    def ShowTip(self):
        try:
            showTipText = open(opj("data/showTips")).read()
            showTip, index = eval(showTipText)
        except IOError:
            showTip, index = (1, 0)
        if showTip:
            tp = wx.CreateFileTipProvider(opj("data/tips.txt"), index)
            ##tp = MyTP(0)
            showTip = wx.ShowTip(self, tp)
            index = tp.GetCurrentTip()
            open(opj("data/showTips"), "w").write(str( (showTip, index) ))


    #---------------------------------------------
    def OnDemoMenu(self, event):
        try:
            selectedDemo = self.treeMap[self.mainmenu.GetLabel(event.GetId())]
        except:
            selectedDemo = None
        if selectedDemo:
            self.tree.SelectItem(selectedDemo)
            self.tree.EnsureVisible(selectedDemo)



    #---------------------------------------------
    def OnIconfiy(self, evt):
        wx.LogMessage("OnIconfiy: %s" % evt.Iconized())
        evt.Skip()

    #---------------------------------------------
    def OnMaximize(self, evt):
        wx.LogMessage("OnMaximize")
        evt.Skip()

    #---------------------------------------------
    def OnActivate(self, evt):
        wx.LogMessage("OnActivate: %s" % evt.GetActive())
        evt.Skip()

    #---------------------------------------------
    def OnAppActivate(self, evt):
        wx.LogMessage("OnAppActivate: %s" % evt.GetActive())
        evt.Skip()

#---------------------------------------------------------------------------
#---------------------------------------------------------------------------

class MySplashScreen(wx.SplashScreen):
    def __init__(self):
        bmp = wx.Image(opj("bitmaps/splash.png")).ConvertToBitmap()
        wx.SplashScreen.__init__(self, bmp,
                                 wx.SPLASH_CENTRE_ON_SCREEN | wx.SPLASH_TIMEOUT,
                                 5000, None, -1)
        self.Bind(wx.EVT_CLOSE, self.OnClose)
        self.fc = wx.FutureCall(2000, self.ShowMain)


    def OnClose(self, evt):
        # Make sure the default handler runs too so this window gets
        # destroyed
        evt.Skip()
        self.Hide()
        
        # if the timer is still running then go ahead and show the
        # main frame now
        if self.fc.IsRunning():
            self.fc.Stop()
            self.ShowMain()


    def ShowMain(self):
        frame = wxPythonDemo(None, "wxPython: (A Demonstration)")
        frame.Show()
        if self.fc.IsRunning():
            self.Raise()
        

class MyApp(wx.App):
    def OnInit(self):
        """
        Create and show the splash screen.  It will then create and show
        the main frame when it is time to do so.
        """

        wx.SystemOptions.SetOptionInt("mac.window-plain-transition", 1)

        # For debugging
        #self.SetAssertMode(wx.PYAPP_ASSERT_DIALOG)

        # Normally when using a SplashScreen you would create it, show
        # it and then continue on with the applicaiton's
        # initialization, finally creating and showing the main
        # application window(s).  In this case we have nothing else to
        # do so we'll delay showing the main frame until later (see
        # ShowMain above) so the users can see the SplashScreen effect.        
        splash = MySplashScreen()
        splash.Show()

        return True



#---------------------------------------------------------------------------

def main():
    try:
        demoPath = os.path.dirname(__file__)
        os.chdir(demoPath)
    except:
        pass
    app = MyApp(False)
    app.MainLoop()

#---------------------------------------------------------------------------


mainOverview = """<html><body>
<h2>wxPython</h2>

<p> wxPython is a <b>GUI toolkit</b> for the Python programming
language.  It allows Python programmers to create programs with a
robust, highly functional graphical user interface, simply and easily.
It is implemented as a Python extension module (native code) that
wraps the popular wxWindows cross platform GUI library, which is
written in C++.

<p> Like Python and wxWindows, wxPython is <b>Open Source</b> which
means that it is free for anyone to use and the source code is
available for anyone to look at and modify.  Or anyone can contribute
fixes or enhancements to the project.

<p> wxPython is a <b>cross-platform</b> toolkit.  This means that the
same program will run on multiple platforms without modification.
Currently supported platforms are 32-bit Microsoft Windows, most Unix
or unix-like systems, and Macintosh OS X. Since the language is
Python, wxPython programs are <b>simple, easy</b> to write and easy to
understand.

<p> <b>This demo</b> is not only a collection of test cases for
wxPython, but is also designed to help you learn about and how to use
wxPython.  Each sample is listed in the tree control on the left.
When a sample is selected in the tree then a module is loaded and run
(usually in a tab of this notebook,) and the source code of the module
is loaded in another tab for you to browse and learn from.

"""


#----------------------------------------------------------------------------
#----------------------------------------------------------------------------

if __name__ == '__main__':
    __name__ = 'Main'
    main()

#----------------------------------------------------------------------------