fixing return values and handling of invalid files

[wxWidgets.git] / docs / doxygen / overviews / propgrid.h

diff --git a/docs/doxygen/overviews/propgrid.h b/docs/doxygen/overviews/propgrid.h
index 802ee7073883e6d298c5c2b77d21b8b9349bb522..6f35486232016ff84cef7c55b2c4c6b36b3a3bc1 100644 (file)
--- a/docs/doxygen/overviews/propgrid.h
+++ b/docs/doxygen/overviews/propgrid.h
@@ -2,7 +2,7 @@
 // Name:        propgrid.h
 // Purpose:     topic overview
 // Author:      wxWidgets team
 // Name:        propgrid.h
 // Purpose:     topic overview
 // Author:      wxWidgets team

-// RCS-ID:      $Id:
+// RCS-ID:      $Id$

 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 


@@ -17,18 +17,19 @@ Key Classes:
 @li wxPropertyGridManager
 @li wxPropertyGridPage
 
 @li wxPropertyGridManager
 @li wxPropertyGridPage
 

-  wxPropertyGrid is a specialized grid for editing properties such as strings,
-numbers, flagsets, fonts, and colours. It is possible, for example, to categorize
-properties, set up a complete tree-hierarchy, add multiple columns, and set
-arbitrary per-property attributes.
+  wxPropertyGrid is a specialized grid for editing properties - in other
+words name = value pairs. List of ready-to-use property classes include
+strings, numbers, flag sets, fonts, colours and many others. It is possible,
+for example, to categorize properties, set up a complete tree-hierarchy,
+add more than two columns, and set arbitrary per-property attributes.

 
 @li @ref propgrid_basics
 @li @ref propgrid_categories
 @li @ref propgrid_parentprops
 @li @ref propgrid_enumandflags
 @li @ref propgrid_advprops
 
 @li @ref propgrid_basics
 @li @ref propgrid_categories
 @li @ref propgrid_parentprops
 @li @ref propgrid_enumandflags
 @li @ref propgrid_advprops

+@li @ref propgrid_processingvalues

 @li @ref propgrid_iterating
 @li @ref propgrid_iterating

-@li @ref propgrid_operations

 @li @ref propgrid_events
 @li @ref propgrid_validating
 @li @ref propgrid_populating
 @li @ref propgrid_events
 @li @ref propgrid_validating
 @li @ref propgrid_populating


@@ -38,10 +39,6 @@ arbitrary per-property attributes.
 @li @ref propgrid_subclassing
 @li @ref propgrid_misc
 @li @ref propgrid_proplist
 @li @ref propgrid_subclassing
 @li @ref propgrid_misc
 @li @ref propgrid_proplist

-@li @ref propgrid_userhelp
-@li @ref propgrid_notes
-@li @ref propgrid_newprops
-@li @ref propgrid_neweditors

 
 @section propgrid_basics Creating and Populating wxPropertyGrid
 
 
 @section propgrid_basics Creating and Populating wxPropertyGrid
 


@@ -72,12 +69,12 @@ other wxWidgets controls:
     // Window style flags are at premium, so some less often needed ones are
     // available as extra window styles (wxPG_EX_xxx) which must be set using
     // SetExtraStyle member function. wxPG_EX_HELP_AS_TOOLTIPS, for instance,
     // Window style flags are at premium, so some less often needed ones are
     // available as extra window styles (wxPG_EX_xxx) which must be set using
     // SetExtraStyle member function. wxPG_EX_HELP_AS_TOOLTIPS, for instance,

-    // allows displaying help strings as tooltips.
+    // allows displaying help strings as tool tips.

     pg->SetExtraStyle( wxPG_EX_HELP_AS_TOOLTIPS );
 
 @endcode
 
     pg->SetExtraStyle( wxPG_EX_HELP_AS_TOOLTIPS );
 
 @endcode
 

-  (for complete list of new window styles: @link wndflags Additional Window Styles@endlink)
+  (for complete list of new window styles, see @ref propgrid_window_styles)

 
   wxPropertyGrid is usually populated with lines like this:
 
 
   wxPropertyGrid is usually populated with lines like this:
 


@@ -121,97 +118,62 @@ To demonstrate other common property classes, here's another code snippet:
     // A file selector property.
     pg->Append( new wxFileProperty(wxT("FileProperty"), wxPG_LABEL, wxEmptyString) );
 
     // A file selector property.
     pg->Append( new wxFileProperty(wxT("FileProperty"), wxPG_LABEL, wxEmptyString) );
 

-    // Extra: set wildcard for file property (format same as in wxFileDialog).
+    // Extra: set wild card for file property (format same as in wxFileDialog).

     pg->SetPropertyAttribute( wxT("FileProperty"),
                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 
 @endcode
 
     pg->SetPropertyAttribute( wxT("FileProperty"),
                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 
 @endcode
 

-  Operations on properties should be done either via wxPropertyGrid's
-(or wxPropertyGridManager's) methods, or by acquiring pointer to a property
-(Append returns a wxPGProperty* or wxPGId, which is typedef for same), and then
-calling its method. Note however that property's methods generally do not
-automatically update grid graphics.
+  Operations on properties are usually done by directly calling wxPGProperty's
+or wxPropertyGridInterface's member functions. wxPropertyGridInterface is an
+abstract base class for property containers such as wxPropertyGrid,
+wxPropertyGridManager, and wxPropertyGridPage. Note however that wxPGProperty's
+member functions generally do not refresh the grid.

 
 

-  Property container functions operating on properties, such as SetPropertyValue or
-DisableProperty, all accept a special wxPGPropArg, argument which can automatically
-convert name of a property to a pointer. For instance:
+  wxPropertyGridInterface's property operation member functions , such as
+SetPropertyValue() and DisableProperty(), all accept a special wxPGPropArg id
+argument, using which you can refer to properties either by their pointer
+(for performance) or by their name (for convenience). For instance:

 
 @code
 
 @code

-    // A file selector property.
-    wxPGPropety* p = pg->Append( new wxFileProperty(wxT("FileProperty"), wxPG_LABEL, wxEmptyString) );
+    // Add a file selector property.
+    wxPGPropety* prop = pg->Append( new wxFileProperty(wxT("FileProperty"),
+                                    wxPG_LABEL,
+                                    wxEmptyString) );

 
 

-    // Valid: Set wildcard by name
+    // Valid: Set wild card by name

     pg->SetPropertyAttribute( wxT("FileProperty"),
                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 
     pg->SetPropertyAttribute( wxT("FileProperty"),
                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 

-    // Also Valid: Set wildcard by ptr
-    pg->SetPropertyAttribute( p,
+    // Also Valid: Set wild card by property pointer
+    pg->SetPropertyAttribute( prop,

                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 @endcode
 
                               wxPG_FILE_WILDCARD,
                               wxT("All files (*.*)|*.*") );
 @endcode
 

-Using pointer is faster, since it doesn't require hash map lookup. Anyway, you can allways
-get property pointer (wxPGProperty*) as Append/Insert return value, or by calling
-GetPropertyByName.
-
-  Below are samples for using some of the more commong operations. See 
-wxPropertyGridInterface and wxPropertyGrid class references for complete list.
-
-@code
-
-    // wxPGId is a short-hand for wxPGProperty*. Let's use it this time.
-    wxPGId id = pg->GetPropertyByName( wxT("MyProperty") );
-
-    // There are many overloaded versions of this method, of which each accept
-    // different type of value.
-    pg->SetPropertyValue( wxT("MyProperty"), 200 );
-
-    // Setting a string works for all properties - conversion is done
-    // automatically.
-    pg->SetPropertyValue( id, wxT("400") );
-
-    // Getting property value as wxVariant.
-    wxVariant value = pg->GetPropertyValue( wxT("MyProperty") );
-
-    // Getting property value as String (again, works for all typs).
-    wxString value = pg->GetPropertyValueAsString( id );
-
-    // Getting property value as int. Provokes a run-time error
-    // if used with property which value type is not "long".
-    long value = pg->GetPropertyValueAsLong( wxT("MyProperty") );
-
-    // Set new name.
-    pg->SetPropertyName( wxT("MyProperty"), wxT("X") );
-
-    // Set new label - we need to use the new name.
-    pg->SetPropertyLabel( wxT("X"), wxT("New Label") );
-
-    // Disable the property. It's text will appear greyed.
-    // This is probably the closest you can get if you want
-    // a "read-only" property.
-    pg->DisableProperty( id );
-
-@endcode
-
+  Using pointer is faster, since it doesn't require hash map lookup. Anyway,
+you can always get property pointer (wxPGProperty*) as return value from Append()
+or Insert(), or by calling wxPropertyGridInterface::GetPropertyByName() or
+just plain GetProperty().

 
 @section propgrid_categories Categories
 
 
 @section propgrid_categories Categories
 

-  wxPropertyGrid has a hierarchial property storage and display model, which
+  wxPropertyGrid has a hierarchic property storage and display model, which

 allows property categories to hold child properties and even other
 categories. Other than that, from the programmer's point of view, categories
 can be treated exactly the same as "other" properties. For example, despite
 allows property categories to hold child properties and even other
 categories. Other than that, from the programmer's point of view, categories
 can be treated exactly the same as "other" properties. For example, despite

-its name, GetPropertyByName also returns a category by name, and SetPropertyLabel
-also sets label of a category. Note however that sometimes the label of a
-property category may be referred as caption (for example, there is
-SetCaptionForegroundColour method that sets text colour of a property category's label).
+its name, GetPropertyByName() also returns a category by name. Note however
+that sometimes the label of a property category may be referred as caption
+(for example, there is wxPropertyGrid::SetCaptionTextColour() method
+that sets text colour of property category labels).

 
   When category is added at the top (i.e. root) level of the hierarchy,
 it becomes a *current category*. This means that all other (non-category)
 
   When category is added at the top (i.e. root) level of the hierarchy,
 it becomes a *current category*. This means that all other (non-category)

-properties after it are automatically added to it. You may add
-properties to specific categories by using wxPropertyGrid::Insert or wxPropertyGrid::AppendIn.
+properties after it are automatically appended to it. You may add
+properties to specific categories by using wxPropertyGridInterface::Insert
+or wxPropertyGridInterface::AppendIn.

 
   Category code sample:
 
 
   Category code sample:
 


@@ -227,7 +189,7 @@ properties to specific categories by using wxPropertyGrid::Insert or wxPropertyG
     pg->Append( new wxIntProperty(wxT("Weight")) );
 
     // Another one
     pg->Append( new wxIntProperty(wxT("Weight")) );
 
     // Another one

-    pg->Append( new wxPropertyCategory(wxT("Attrikbutes")) );
+    pg->Append( new wxPropertyCategory(wxT("Attributes")) );

 
     // All these are added to "Attributes" category
     pg->Append( new wxIntProperty(wxT("Intelligence")) );
 
     // All these are added to "Attributes" category
     pg->Append( new wxIntProperty(wxT("Intelligence")) );


@@ -239,49 +201,56 @@ properties to specific categories by using wxPropertyGrid::Insert or wxPropertyG
 
 @section propgrid_parentprops Tree-like Property Structure
 
 
 @section propgrid_parentprops Tree-like Property Structure
 

-  As a new feature in version 1.3.1, basicly any property can have children. There
-are few limitations, however.
+  Basically any property can have children. There are few limitations, however.

 
 @remarks
 
 @remarks

-- Names of properties with non-category, non-root parents are not stored in hash map.
-  Instead, they can be accessed with strings like "Parent.Child". For instance, in
-  the sample below, child property named "Max. Speed (mph)" can be accessed by global
-  name "Car.Speeds.Max Speed (mph)".
-- If you want to property's value to be a string composed based on the values of
-  child properties, you must use wxStringProperty as parent and use value "<composed>".
+- Names of properties with non-category, non-root parents are not stored in global
+  hash map. Instead, they can be accessed with strings like "Parent.Child".
+  For instance, in the sample below, child property named "Max. Speed (mph)"
+  can be accessed by global name "Car.Speeds.Max Speed (mph)".
+- If you want to property's value to be a string composed of the child property values,
+  you must use wxStringProperty as parent and use magic string "<composed>" as its
+  value.

 - Events (eg. change of value) that occur in parent do not propagate to children. Events
   that occur in children will propagate to parents, but only if they are wxStringProperties
   with "<composed>" value.
 - Events (eg. change of value) that occur in parent do not propagate to children. Events
   that occur in children will propagate to parents, but only if they are wxStringProperties
   with "<composed>" value.

-- Old wxParentProperty class is deprecated, and remains as a typedef of wxStringProperty.
-  If you want old value behavior, you must specify "<composed>" as wxStringProperty's
-  value.

 
 Sample:
 
 @code
 
 Sample:
 
 @code

-    wxPGId pid = pg->Append( new wxStringProperty(wxT("Car"),wxPG_LABEL,wxT("<composed>")) );
+    wxPGProperty* carProp = pg->Append(new wxStringProperty(wxT("Car"),
+                                         wxPG_LABEL,
+                                         wxT("<composed>")));

 
 

-    pg->AppendIn( pid, new wxStringProperty(wxT("Model"),
+    pg->AppendIn(carProp, new wxStringProperty(wxT("Model"),
+                                                wxPG_LABEL,
+                                                wxT("Lamborghini Diablo SV")));
+
+    pg->AppendIn(carProp, new wxIntProperty(wxT("Engine Size (cc)"),

                                             wxPG_LABEL,
                                             wxPG_LABEL,

-                                            wxT("Lamborghini Diablo SV")) );
+                                            5707) );

 
 

-    pg->AppendIn( pid, new wxIntProperty(wxT("Engine Size (cc)"),
-                                         wxPG_LABEL,
-                                         5707) );
+    wxPGProperty* speedsProp = pg->AppendIn(carProp,
+                                            new wxStringProperty(wxT("Speeds"),
+                                              wxPG_LABEL,
+                                              wxT("<composed>")));

 
 

-    wxPGId speedId = pg->AppendIn( pid, new wxStringProperty(wxT("Speeds"),wxPG_LABEL,wxT("<composed>")) );
-    pg->AppendIn( speedId, new wxIntProperty(wxT("Max. Speed (mph)"),wxPG_LABEL,290) );
-    pg->AppendIn( speedId, new wxFloatProperty(wxT("0-100 mph (sec)"),wxPG_LABEL,3.9) );
-    pg->AppendIn( speedId, new wxFloatProperty(wxT("1/4 mile (sec)"),wxPG_LABEL,8.6) );
+    pg->AppendIn( speedsProp, new wxIntProperty(wxT("Max. Speed (mph)"),
+                                                wxPG_LABEL,290) );
+    pg->AppendIn( speedsProp, new wxFloatProperty(wxT("0-100 mph (sec)"),
+                                                  wxPG_LABEL,3.9) );
+    pg->AppendIn( speedsProp, new wxFloatProperty(wxT("1/4 mile (sec)"),
+                                                  wxPG_LABEL,8.6) );

 
 

-    // Make sure the child properties can be accessed correctly
+    // This is how child property can be referred to by name

     pg->SetPropertyValue( wxT("Car.Speeds.Max. Speed (mph)"), 300 );
 
     pg->SetPropertyValue( wxT("Car.Speeds.Max. Speed (mph)"), 300 );
 

-    pg->AppendIn( pid, new wxIntProperty(wxT("Price ($)"),
-                                         wxPG_LABEL,
-                                         300000) );
-    // Displayed value of "Car" property is now:
-    // "Lamborghini Diablo SV; [300; 3.9; 8.6]; 300000"
+    pg->AppendIn(carProp, new wxIntProperty(wxT("Price ($)"),
+                                            wxPG_LABEL,
+                                            300000) );
+
+    // Displayed value of "Car" property is now very close to this:
+    // "Lamborghini Diablo SV; 5707 [300; 3.9; 8.6] 300000"

 
 @endcode
 
 
 @endcode
 


@@ -290,14 +259,14 @@ Sample:
   wxEnumProperty is used when you want property's (integer or string) value
 to be selected from a popup list of choices.
 
   wxEnumProperty is used when you want property's (integer or string) value
 to be selected from a popup list of choices.
 

-  Creating wxEnumProperty is more complex than those described earlier.
-You have to provide list of constant labels, and optionally relevant values
-(if label indexes are not sufficient).
+  Creating wxEnumProperty is slightly more complex than those described
+earlier. You have to provide list of constant labels, and optionally relevant
+values (if label indexes are not sufficient).

 
 @remarks
 
 
 @remarks
 

-- Value wxPG_INVALID_VALUE (equals 2147483647 which usually equals INT_MAX) is not
-  allowed as value.
+- Value wxPG_INVALID_VALUE (equals INT_MAX) is not allowed as list
+  item value.

 
 A very simple example:
 
 
 A very simple example:
 


@@ -315,8 +284,6 @@ A very simple example:
                                    wxPG_LABEL,
                                    arrDiet) );
 
                                    wxPG_LABEL,
                                    arrDiet) );
 

-
-

     //
     // Using wxChar* array
     //
     //
     // Using wxChar* array
     //


@@ -327,7 +294,6 @@ A very simple example:
                                    wxPG_LABEL,
                                    arrayDiet) );
 
                                    wxPG_LABEL,
                                    arrayDiet) );
 

-

 @endcode
 
 Here's extended example using values as well:
 @endcode
 
 Here's extended example using values as well:


@@ -355,84 +321,47 @@ Here's extended example using values as well:
                                    arrIds,
                                    50));
 
                                    arrIds,
                                    50));
 

-
-    //
-    // Using wxChar* and long arrays
-    //
-    const wxChar* array_diet[] =
-    { wxT("Herbivore"), wxT("Carnivore"), wxT("Omnivore"), NULL };
-
-    long array_diet_ids[] =
-    { 40, 45, 50 };
-
-    // Value can be set from string as well
-    pg->Append( new wxEnumProperty(wxT("Diet"),
-                                   wxPG_LABEL,
-                                   array_diet,
-                                   array_diet_ids);
-

 @endcode
 
   wxPGChoices is a class where wxEnumProperty, and other properties which
 @endcode
 
   wxPGChoices is a class where wxEnumProperty, and other properties which

-  require label storage, actually stores strings and values. It is used
-  to facilitiate reference counting, and therefore recommended way of
+  require storage for list of items, actually stores strings and values. It is
+  used to facilitate reference counting, and therefore recommended way of

   adding items when multiple properties share the same set.
 
   You can use wxPGChoices directly as well, filling it and then passing it
   adding items when multiple properties share the same set.
 
   You can use wxPGChoices directly as well, filling it and then passing it

-  to the constructor. Infact, if you wish to display bitmaps next to labels,
+  to the constructor. In fact, if you wish to display bitmaps next to labels,

   your best choice is to use this approach.
 
 @code
 
     wxPGChoices chs;
   your best choice is to use this approach.
 
 @code
 
     wxPGChoices chs;

-    chs.Add(wxT("Herbivore"),40);
-    chs.Add(wxT("Carnivore"),45);
-    chs.Add(wxT("Omnivore"),50);
+    chs.Add(wxT("Herbivore"), 40);
+    chs.Add(wxT("Carnivore"), 45);
+    chs.Add(wxT("Omnivore"), 50);

 
     // Let's add an item with bitmap, too
     chs.Add(wxT("None of the above"), wxBitmap(), 60);
 
 
     // Let's add an item with bitmap, too
     chs.Add(wxT("None of the above"), wxBitmap(), 60);
 

-    // Note: you can add even whole arrays to wxPGChoices
-
-    pg->Append( new wxEnumProperty(wxT("Diet"),
+    pg->Append( new wxEnumProperty(wxT("Primary Diet"),

                                    wxPG_LABEL,
                                    chs) );
 
     // Add same choices to another property as well - this is efficient due
     // to reference counting
                                    wxPG_LABEL,
                                    chs) );
 
     // Add same choices to another property as well - this is efficient due
     // to reference counting

-    pg->Append( new wxEnumProperty(wxT("Diet 2"),
+    pg->Append( new wxEnumProperty(wxT("Secondary Diet"),

                                    wxPG_LABEL,
                                    chs) );
                                    wxPG_LABEL,
                                    chs) );

-
- @endcode
-
-If you later need to change choices used by a property, there is function
-for that as well.
-
-@code
-
-    //
-    // Example 1: Add one extra item
-    wxPGChoices& choices = pg->GetPropertyChoices(wxT("Diet"));
-    choices.Add(wxT("Custom"),55);
-
-    //
-    // Example 2: Replace all the choices
-    wxPGChoices chs;
-    chs.Add(wxT("<No valid items yet>"),0);
-    pg->SetPropertyChoices(wxT("Diet"),chs);
-

 @endcode
 
 @endcode
 

-If you want to create your enum properties with simple (label,name,value)
-constructor, then you need to create a new property class using one of the
-supplied macro pairs. See @ref pgproperty_creating for details.
+You can later change choices of property by using wxPGProperty::AddChoice(),
+wxPGProperty::InsertChoice(), wxPGProperty::DeleteChoice(), and
+wxPGProperty::SetChoices().

 
 

-<b>wxEditEnumProperty</b> is works exactly like wxEnumProperty, except
-is uses non-readonly combobox as default editor, and value is stored as
+<b>wxEditEnumProperty</b> works exactly like wxEnumProperty, except
+is uses non-read-only combo box as default editor, and value is stored as

 string when it is not any of the choices.
 
 string when it is not any of the choices.
 

-wxFlagsProperty is similar:
+wxFlagsProperty has similar construction:

 
 @code
 
 
 @code
 


@@ -452,10 +381,9 @@ wxFlagsProperty is similar:
 @endcode
 
 wxFlagsProperty can use wxPGChoices just the same way as wxEnumProperty
 @endcode
 
 wxFlagsProperty can use wxPGChoices just the same way as wxEnumProperty

-(and also custom property classes can be created with similar macro pairs).
-<b>Note: </b> When changing "choices" (ie. flag labels) of wxFlagsProperty,
-you will need to use SetPropertyChoices - otherwise they will not get updated
-properly.
+<b>Note:</b> When changing "choices" (ie. flag labels) of wxFlagsProperty,
+you will need to use wxPGProperty::SetChoices() to replace all choices
+at once - otherwise implicit child properties will not get updated properly.

 
 @section propgrid_advprops Specialized Properties
 
 
 @section propgrid_advprops Specialized Properties
 


@@ -474,7 +402,7 @@ To use them, you have to include <wx/propgrid/advprops.h>.
                                    wxPG_LABEL,
                                    wxDateTime::Now()) );
 
                                    wxPG_LABEL,
                                    wxDateTime::Now()) );
 

-    // Image file property. Wildcard is auto-generated from available
+    // Image file property. Wild card is auto-generated from available

     // image handlers, so it is not set this time.
     pg->Append( new wxImageFileProperty(wxT("Label of ImageFileProperty"),
                                         wxT("NameOfImageFileProp")) );
     // image handlers, so it is not set this time.
     pg->Append( new wxImageFileProperty(wxT("Label of ImageFileProperty"),
                                         wxT("NameOfImageFileProp")) );


@@ -508,12 +436,45 @@ To use them, you have to include <wx/propgrid/advprops.h>.
 @endcode
 
 
 @endcode
 
 

+@section propgrid_processingvalues Processing Property Values
+
+Properties store their values internally in wxVariant. You can obtain
+this value using wxPGProperty::GetValue() or wxPropertyGridInterface::
+GetPropertyValue().
+
+If you wish to obtain property value in specific data type, you can
+call various getter functions, such as wxPropertyGridInterface::
+GetPropertyValueAsString(), which, as name might say, returns property
+value's string representation. While this particular function is very
+safe to use for any kind of property, some might display error message
+if property value is not in compatible enough format. For instance,
+wxPropertyGridInterface::GetPropertyValueAsLongLong() will support
+long as well as wxLongLong, but GetPropertyValueAsArrayString() only
+supports wxArrayString and nothing else.
+
+In any case, you will need to take extra care when dealing with
+raw wxVariant values. For instance, wxIntProperty and wxUIntProperty,
+store value internally as wx(U)LongLong when number doesn't fit into
+standard long type. Using << operator to get wx(U)LongLong from wxVariant
+is customized to work quite safely with various types of variant data.
+
+You may have noticed that properties store, in wxVariant, values of many
+types which are not natively supported by it. Custom wxVariantDatas
+are therefore implemented and << and >> operators implemented to
+convert data from and to wxVariant.
+
+Note that in some cases property value can be Null variant, which means
+that property value is unspecified. This usually occurs only when
+wxPG_EX_AUTO_UNSPECIFIED_VALUES extra window style is defined or when you
+manually set property value to Null (or unspecified).
+
+

 @section propgrid_iterating Iterating through a property container
 
 You can use somewhat STL'ish iterator classes to iterate through the grid.
 Here is a simple example of forward iterating through all individual
 @section propgrid_iterating Iterating through a property container
 
 You can use somewhat STL'ish iterator classes to iterate through the grid.
 Here is a simple example of forward iterating through all individual

-properties (not categories or sub-propeties that are normally 'transparent'
-to application code):
+properties (not categories nor private child properties that are normally
+'transparent' to application code):

 
 @code
 
 
 @code
 


@@ -547,9 +508,8 @@ As expected there is also a const iterator:
 
 You can give some arguments to GetIterator to determine which properties
 get automatically filtered out. For complete list of options, see
 
 You can give some arguments to GetIterator to determine which properties
 get automatically filtered out. For complete list of options, see

-@link iteratorflags List of Property Iterator Flags@endlink. GetIterator()
-also accepts other arguments. See wxPropertyGridInterface::GetIterator()
-for details.
+@ref propgrid_iterator_flags. GetIterator() also accepts other arguments.
+See wxPropertyGridInterface::GetIterator() for details.

 
 This example reverse-iterates through all visible items:
 
 
 This example reverse-iterates through all visible items:
 


@@ -572,8 +532,9 @@ This example reverse-iterates through all visible items:
 
 GetIterator() only works with wxPropertyGrid and the individual pages
 of wxPropertyGridManager. In order to iterate through an arbitrary
 
 GetIterator() only works with wxPropertyGrid and the individual pages
 of wxPropertyGridManager. In order to iterate through an arbitrary

-property container, you need to use wxPropertyGridInterface::GetVIterator().
-Note however that this virtual iterater is limited to forward iteration.
+property container (such as entire wxPropertyGridManager), you need to use
+wxPropertyGridInterface::GetVIterator(). Note however that this virtual
+iterator is limited to forward iteration.

 
 @code
 
 
 @code
 


@@ -589,48 +550,6 @@ Note however that this virtual iterater is limited to forward iteration.
 
 @endcode
 
 
 @endcode
 

-
-@section propgrid_operations More About Operating with Properties
-
-Getting value of selected wxSystemColourProperty (which value type is derived
-from wxObject):
-
-@code
-
-    wxPGId id = pg->GetSelection();
-
-    if ( id )
-    {
-        // Get name of property
-        const wxString& name = pg->GetPropertyName( id );
-
-        // If type is not correct, GetColour() method will produce run-time error
-        if ( pg->GetPropertyValueType() == wxT("wxColourPropertyValue") ) )
-        {
-            wxColourPropertyValue* pcolval =
-                wxDynamicCast(pg->GetPropertyValueAsWxObjectPtr(id),
-                              wxColourPropertyValue);
-
-            // Report value
-            wxString text;
-            if ( pcolval->m_type == wxPG_CUSTOM_COLOUR )
-                text.Printf( wxT("It is custom colour: (%i,%i,%i)"),
-                    (int)pcolval->m_colour.Red(),
-                    (int)pcolval->m_colour.Green(),
-                    (int)pcolval->m_colour.Blue());
-            else
-                text.Printf( wxT("It is wx system colour (number=%i): (%i,%i,%i)"),
-                    (int)pcolval->m_type,
-                    (int)pcolval->m_colour.Red(),
-                    (int)pcolval->m_colour.Green(),
-                    (int)pcolval->m_colour.Blue());
-
-            wxMessageBox( text );
-        }
-    }
-
-@endcode
-

 @section propgrid_populating Populating wxPropertyGrid Automatically
 
 @subsection propgrid_fromvariants Populating from List of wxVariants
 @section propgrid_populating Populating wxPropertyGrid Automatically
 
 @subsection propgrid_fromvariants Populating from List of wxVariants


@@ -640,10 +559,10 @@ in an arbitrary list of wxVariants.
 
 @code
 
 
 @code
 

-    // This is a static method that initializes *all* builtin type handlers
+    // This is a static method that initializes *all* built-in type handlers

     // available, including those for wxColour and wxFont. Refers to *all*
     // included properties, so when compiling with static library, this
     // available, including those for wxColour and wxFont. Refers to *all*
     // included properties, so when compiling with static library, this

-    // method may increase the executable size significantly.
+    // method may increase the executable size noticeably.

     pg->InitAllTypeHandlers();
 
     // Get contents of the grid as a wxVariant list
     pg->InitAllTypeHandlers();
 
     // Get contents of the grid as a wxVariant list


@@ -653,44 +572,21 @@ in an arbitrary list of wxVariants.
     // name is not found, it is created according to the type of variant.
     pg->SetPropertyValues( my_list_variant );
 
     // name is not found, it is created according to the type of variant.
     pg->SetPropertyValues( my_list_variant );
 

-    // In order to get wxObject ptr from a variant value,
-    // wxGetVariantCast(VARIANT,CLASSNAME) macro has to be called.
-    // Like this:
-    wxVariant v_txcol = pg->GetPropertyValue(wxT("Text Colour"));
-    const wxColour& txcol = wxGetVariantCast(v_txcol,wxColour);
-

 @endcode
 
 @subsection propgrid_fromfile Loading Population from a Text-based Storage
 
 Class wxPropertyGridPopulator may be helpful when writing code that
 @endcode
 
 @subsection propgrid_fromfile Loading Population from a Text-based Storage
 
 Class wxPropertyGridPopulator may be helpful when writing code that

-loads properties from a text-source. In fact, the supplied xrc handler
-(src/xh_propgrid.cpp) uses it. See that code for more info.
-NOTE: src/xh_propgrid.cpp is not included in the library by default,
-to avoid dependency to wxXRC. You will need to add it to your application
-separately.
-
-@subsection propgrid_editablestate Saving and Restoring User-Editable State
+loads properties from a text-source. In fact, the wxPropertyGrid xrc-handler
+(which may not be currently included in wxWidgets, but probably will be in
+near future) uses it.

 
 

-You can use wxPGEditableState and wxPGMEditableState classes, and
-wxPropertyGrid::SaveEditableState() and wxPropertyGrid::RestoreEditableState()
-to save and restore user-editable state (selected property, expanded/
-collapsed properties, and scrolled position). For convience with
-program configuration, wxPGEditableState has functions to save/load
-its value in wxString. For instance:
-
-@code
-    // Save state into config
-    wxPGEditableState edState;
-    pg->SaveEditableState(&edState);
-    programConfig->Store(wxT("PropertyGridState"), edState.GetAsString());
-
-    // Restore state from config
-    wxPGEditableState edState;
-    edState.SetFromString(programConfig->Load(wxT("PropertyGridState")));
-    pg->RestoreEditableState(edState);
-@endcode
+@subsection editablestate Saving and Restoring User-Editable State

 
 

+You can use wxPropertyGridInterface::SaveEditableState() and
+wxPropertyGridInterface::RestoreEditableState() to save and restore
+user-editable state (selected property, expanded/collapsed properties,
+selected page, scrolled position, and splitter positions).

 
 @section propgrid_events Event Handling
 
 
 @section propgrid_events Event Handling
 


@@ -700,62 +596,14 @@ in your event table to use it.
 
 For complete list of event types, see wxPropertyGrid class reference.
 
 
 For complete list of event types, see wxPropertyGrid class reference.
 

-The custom event class, wxPropertyGridEvent, has methods to directly
-access the property that triggered the event.
-
-Here's a small sample:
-
-@code
-
-// Portion of an imaginary event table
-BEGIN_EVENT_TABLE(MyForm, wxFrame)
-
-    ...
-
-    // This occurs when a property value changes
-    EVT_PG_CHANGED( PGID, MyForm::OnPropertyGridChange )
-
-    ...
-
-END_EVENT_TABLE()
-
-void MyForm::OnPropertyGridChange( wxPropertyGridEvent& event )
-{
-    wxPGProperty *property = event.GetProperty();
-
-    // It may be NULL
-    if ( !property )
-        return;
-
-    // Get name of changed property
-    const wxString& name = property->GetName();
-
-    // Get resulting value
-    wxVariant value = property->GetValue();
-}
-
-@endcode
-
-Another event type you might find useful is EVT_PG_CHANGING, which occurs
-just prior property value is being changed by user. You can acquire pending
-value using wxPropertyGridEvent::GetValue(), and if it is not acceptable,
-call wxPropertyGridEvent::Veto() to prevent the value change from taking
-place.
+However, one type of event that might need focused attention is EVT_PG_CHANGING,
+which occurs just prior property value is being changed by user. You can
+acquire pending value using wxPropertyGridEvent::GetValue(), and if it is
+not acceptable, call wxPropertyGridEvent::Veto() to prevent the value change
+from taking place.

 
 @code
 
 
 @code
 

-// Portion of an imaginary event table
-BEGIN_EVENT_TABLE(MyForm, wxFrame)
-
-    ...
-
-    // This occurs when a property value changes
-    EVT_PG_CHANGING( PGID, MyForm::OnPropertyGridChanging )
-
-    ...
-
-END_EVENT_TABLE()
-

 void MyForm::OnPropertyGridChanging( wxPropertyGridEvent& event )
 {
     wxPGProperty* property = event.GetProperty();
 void MyForm::OnPropertyGridChanging( wxPropertyGridEvent& event )
 {
     wxPGProperty* property = event.GetProperty();


@@ -774,12 +622,13 @@ void MyForm::OnPropertyGridChanging( wxPropertyGridEvent& event )
 
 @endcode
 
 
 @endcode
 

-@remarks On Sub-property Event Handling
-- For aggregate type properties (wxFontProperty, wxFlagsProperty, etc), events
-  occur for the main parent property only. For other properties events occur
-  for the children themselves..
+@remarks On Child Property Event Handling
+- For properties which have private, implicit children (wxFontProperty and
+  wxFlagsProperty), events occur for the main parent property only.
+  For other properties events occur for the children themselves. See
+  @ref propgrid_parentprops.

 
 

-- When property's child gets changed, you can use wxPropertyGridEvent::GetMainParent
+- When property's child gets changed, you can use wxPropertyGridEvent::GetMainParent()

   to obtain its topmost non-category parent (useful, if you have deeply nested
   properties).
 
   to obtain its topmost non-category parent (useful, if you have deeply nested
   properties).
 


@@ -792,7 +641,7 @@ wxPropertyGridInterface::SetPropertyValidator() to assign wxValidator to
 property.
 
 Second, you can subclass a property and override wxPGProperty::ValidateValue(),
 property.
 
 Second, you can subclass a property and override wxPGProperty::ValidateValue(),

-or handle wxEVT_PG_CHANGING for the same effect. Both of these methods do not
+or handle wxEVT_PG_CHANGING for the same effect. Both of these ways do not

 actually prevent user from temporarily entering invalid text, but they do give
 you an opportunity to warn the user and block changed value from being committed
 in a property.
 actually prevent user from temporarily entering invalid text, but they do give
 you an opportunity to warn the user and block changed value from being committed
 in a property.


@@ -817,7 +666,8 @@ message.
             // Make sure value is not unspecified
             if ( !pendingValue.IsNull() )
             {
             // Make sure value is not unspecified
             if ( !pendingValue.IsNull() )
             {

-                wxFont font << pendingValue;
+                wxFont font;
+                font << pendingValue;

 
                 // Let's just allow Arial font
                 if ( font.GetFaceName() != wxT("Arial") )
 
                 // Let's just allow Arial font
                 if ( font.GetFaceName() != wxT("Arial") )


@@ -840,8 +690,7 @@ each cell in the property grid. Use wxPropertyGridInterface::SetPropertyCell() o
 wxPGProperty::SetCell() for this purpose.
 
 In addition, it is possible to control these characteristics for
 wxPGProperty::SetCell() for this purpose.
 
 In addition, it is possible to control these characteristics for

-wxPGChoices list items. See wxPGChoices::Item() and wxPGChoiceEntry class
-reference for more info.
+wxPGChoices list items. See wxPGChoices class reference for more info.

 
 
 @section propgrid_customizing Customizing Properties (without sub-classing)
 
 
 @section propgrid_customizing Customizing Properties (without sub-classing)


@@ -857,18 +706,11 @@ actual value text. Built-in example of this can be seen with
 wxColourProperty and wxImageFileProperty, but for others it can
 be set using wxPropertyGrid::SetPropertyImage method.
 
 wxColourProperty and wxImageFileProperty, but for others it can
 be set using wxPropertyGrid::SetPropertyImage method.
 

-@subsection propgrid_customvalidator Setting Validator
-
-You can set wxValidator for a property using wxPropertyGrid::SetPropertyValidator.
-
-Validator will work just like in wxWidgets (ie. editorControl->SetValidator(validator)
-is called).
-

 @subsection propgrid_customeditor Setting Property's Editor Control(s)
 
 You can set editor control (or controls, in case of a control and button),
 of any property using wxPropertyGrid::SetPropertyEditor. Editors are passed
 @subsection propgrid_customeditor Setting Property's Editor Control(s)
 
 You can set editor control (or controls, in case of a control and button),
 of any property using wxPropertyGrid::SetPropertyEditor. Editors are passed

-using wxPG_EDITOR(EditorName) macro, and valid built-in EditorNames are
+as wxPGEditor_EditorName, and valid built-in EditorNames are

 TextCtrl, Choice, ComboBox, CheckBox, TextCtrlAndButton, ChoiceAndButton,
 SpinCtrl, and DatePickerCtrl. Two last mentioned ones require call to
 static member function wxPropertyGrid::RegisterAdditionalEditors().
 TextCtrl, Choice, ComboBox, CheckBox, TextCtrlAndButton, ChoiceAndButton,
 SpinCtrl, and DatePickerCtrl. Two last mentioned ones require call to
 static member function wxPropertyGrid::RegisterAdditionalEditors().


@@ -880,9 +722,9 @@ colour selection dialog.
 
 @code
 
 
 @code
 

-    wxPGId colProp = pg->Append(wxColourProperty(wxT("Text Colour")));
-
-    pg->SetPropertyEditor(colProp,wxPG_EDITOR(TextCtrlAndButton));
+    wxPGProperty* colProp = new wxColourProperty(wxT("Text Colour"));
+    pg->Append(colProp);
+    pg->SetPropertyEditor(colProp, wxPGEditor_TextCtrlAndButton);

 
 @endcode
 
 
 @endcode
 


@@ -891,7 +733,8 @@ well. For more information, see wxPGEditor class reference.
 
 @subsection propgrid_editorattrs Property Attributes Recognized by Editors
 
 
 @subsection propgrid_editorattrs Property Attributes Recognized by Editors
 

-<b>SpinCtrl</b> editor can make use of property's "Min", "Max", "Step" and "Wrap" attributes.
+<b>SpinCtrl</b> editor can make use of property's "Min", "Max", "Step" and
+"Wrap" attributes.

 
 @subsection propgrid_multiplebuttons Adding Multiple Buttons Next to an Editor
 
 
 @subsection propgrid_multiplebuttons Adding Multiple Buttons Next to an Editor
 


@@ -907,105 +750,38 @@ from the original TextCtrl).
 @subsection propgrid_attributes Property Attributes
 
 Miscellaneous values, often specific to a property type, can be set
 @subsection propgrid_attributes Property Attributes
 
 Miscellaneous values, often specific to a property type, can be set

-using wxPropertyGrid::SetPropertyAttribute and wxPropertyGrid::SetPropertyAttributeAll
-methods.
+using wxPropertyGridInterface::SetPropertyAttribute() and
+wxPropertyGridInterface::SetPropertyAttributeAll() methods.

 
 Attribute names are strings and values wxVariant. Arbitrary names are allowed
 
 Attribute names are strings and values wxVariant. Arbitrary names are allowed

-inorder to store user values. Constant equivalents of all attribute string names are
-provided. Some of them are defined as cached strings, so using constants can provide
-for smaller binary size.
-
-For complete list of attributes, see @link attrids Property Attributes@endlink.
-
-@subsection propgrid_boolcheckbox Setting wxBoolProperties to Use Check Box
-
-To have all wxBoolProperties to use CheckBox editor instead of Choice, use
-following (call after bool properties have been added):
+in order to store values that are relevant to application only and not
+property grid. Constant equivalents of all attribute string names are
+provided. Some of them are defined as cached strings, so using these constants
+can provide for smaller binary size.

 
 

-@code
-    pg->SetPropertyAttributeAll(wxPG_BOOL_USE_CHECKBOX,true);
-@endcode
+For complete list of attributes, see @ref propgrid_property_attributes.

 
 
 @section propgrid_usage2 Using wxPropertyGridManager
 
 wxPropertyGridManager is an efficient multi-page version of wxPropertyGrid,
 
 
 @section propgrid_usage2 Using wxPropertyGridManager
 
 wxPropertyGridManager is an efficient multi-page version of wxPropertyGrid,

-which can optionally have toolbar for mode and page selection, and a help text
-box.
-
-wxPropertyGridManager inherits from wxPropertyGridInterface, and as such
-it has most property manipulation functions. However, only some of them affect
-properties on all pages (eg. GetPropertyByName() and ExpandAll()), while some
-(eg. Append()) only apply to the currently selected page.
-
-To operate explicitly on properties on specific page, use wxPropertyGridManager::GetPage()
-to obtain pointer to page's wxPropertyGridPage object.
-
-Visual methods, such as SetCellBackgroundColour and GetNextVisible are only
-available in wxPropertyGrid. Use wxPropertyGridManager::GetGrid() to obtain
-pointer to it.
-
-Iteration methods will not work in wxPropertyGridManager. Instead, you must acquire
-the internal grid (GetGrid()) or wxPropertyGridPage object (GetPage()).
-
-wxPropertyGridManager constructor has exact same format as wxPropertyGrid
-constructor, and basicly accepts same extra window style flags (albeit also
-has some extra ones).
-
-Here's some example code for creating and populating a wxPropertyGridManager:
-
-@code
-
-    wxPropertyGridManager* pgMan = new wxPropertyGridManager(this, PGID,
-        wxDefaultPosition, wxDefaultSize,
-        // These and other similar styles are automatically
-        // passed to the embedded wxPropertyGrid.
-        wxPG_BOLD_MODIFIED|wxPG_SPLITTER_AUTO_CENTER|
-        // Include toolbar.
-        wxPG_TOOLBAR |
-        // Include description box.
-        wxPG_DESCRIPTION |
-        // Include compactor.
-        wxPG_COMPACTOR |
-        // Plus defaults.
-        wxPGMAN_DEFAULT_STYLE
-       );
-
-    wxPropertyGridPage* page;
-
-    // Adding a page sets target page to the one added, so
-    // we don't have to call SetTargetPage if we are filling
-    // it right after adding.
-    pgMan->AddPage(wxT("First Page"));
-    page = pgMan->GetLastPage();
-
-    page->Append( new wxPropertyCategory(wxT("Category A1")) );
-
-    page->Append( new wxIntProperty(wxT("Number"),wxPG_LABEL,1) );
-
-    page->Append( new wxColourProperty(wxT("Colour"),wxPG_LABEL,*wxWHITE) );
-
-    pgMan->AddPage(wxT("Second Page"));
-    page = pgMan->GetLastPage();
-
-    page->Append( wxT("Text"),wxPG_LABEL,wxT("(no text)") );
-
-    page->Append( new wxFontProperty(wxT("Font"),wxPG_LABEL) );
-
-@endcode
+which can optionally have tool bar for mode and page selection, and a help text
+box. For more information, see wxPropertyGridManager class reference.

 
 @subsection propgrid_propgridpage wxPropertyGridPage
 
 wxPropertyGridPage is holder of properties for one page in manager. It is derived from
 wxEvtHandler, so you can subclass it to process page-specific property grid events. Hand
 
 @subsection propgrid_propgridpage wxPropertyGridPage
 
 wxPropertyGridPage is holder of properties for one page in manager. It is derived from
 wxEvtHandler, so you can subclass it to process page-specific property grid events. Hand

-over your page instance in wxPropertyGridManager::AddPage.
+over your page instance in wxPropertyGridManager::AddPage().

 
 Please note that the wxPropertyGridPage itself only sports subset of wxPropertyGrid API
 (but unlike manager, this include item iteration). Naturally it inherits from
 
 Please note that the wxPropertyGridPage itself only sports subset of wxPropertyGrid API
 (but unlike manager, this include item iteration). Naturally it inherits from

-wxPropertyGridMethods and wxPropertyGridPageState.
+wxPropertyGridInterface.
+
+For more information, see wxPropertyGridPage class reference.

 
 
 
 

-@section propgrid_subclassing Subclassing wxPropertyGrid and wxPropertyGridManager
+@section propgrid_subclassing Sub-classing wxPropertyGrid and wxPropertyGridManager

 
 Few things to note:
 
 
 Few things to note:
 


@@ -1013,15 +789,16 @@ Few things to note:
   just e-mail to wx-dev mailing list.
 
 - Data manipulation is done in wxPropertyGridPageState class. So, instead of
   just e-mail to wx-dev mailing list.
 
 - Data manipulation is done in wxPropertyGridPageState class. So, instead of

-  overriding wxPropertyGrid::Insert, you'll probably want to override wxPropertyGridPageState::DoInsert.
+  overriding wxPropertyGrid::Insert(), you'll probably want to override
+  wxPropertyGridPageState::DoInsert(). See header file for details.

 
 

-- Override wxPropertyGrid::CreateState to instantiate your derivate wxPropertyGridPageState.
-  For wxPropertyGridManager, you'll need to subclass wxPropertyGridPage instead (since it
-  is derived from wxPropertyGridPageState), and hand over instances in wxPropertyGridManager::AddPage
-  calls.
+- Override wxPropertyGrid::CreateState() to instantiate your derivate
+  wxPropertyGridPageState. For wxPropertyGridManager, you'll need to subclass
+  wxPropertyGridPage instead (since it is derived from wxPropertyGridPageState),
+  and hand over instances in wxPropertyGridManager::AddPage() calls.

 
 

-- You can use a derivate wxPropertyGrid with manager by overriding wxPropertyGridManager::CreatePropertyGrid
-  member function.
+- You can use a derivate wxPropertyGrid with manager by overriding
+  wxPropertyGridManager::CreatePropertyGrid() member function.

 
 
 @section propgrid_misc Miscellaneous Topics
 
 
 @section propgrid_misc Miscellaneous Topics


@@ -1041,17 +818,25 @@ unique (base) name.
 
 @subsection propgrid_boolproperty wxBoolProperty
 
 
 @subsection propgrid_boolproperty wxBoolProperty
 

-  There are few points about wxBoolProperty that require futher discussion:
-  - wxBoolProperty can be shown as either normal combobox or as a checkbox.
+  There are few points about wxBoolProperty that require further discussion:
+  - wxBoolProperty can be shown as either normal combo box or as a check box.

     Property attribute wxPG_BOOL_USE_CHECKBOX is used to change this.
     For example, if you have a wxFlagsProperty, you can
     set its all items to use check box using the following:
     @code
         pg->SetPropertyAttribute(wxT("MyFlagsProperty"),wxPG_BOOL_USE_CHECKBOX,true,wxPG_RECURSE);
     @endcode
     Property attribute wxPG_BOOL_USE_CHECKBOX is used to change this.
     For example, if you have a wxFlagsProperty, you can
     set its all items to use check box using the following:
     @code
         pg->SetPropertyAttribute(wxT("MyFlagsProperty"),wxPG_BOOL_USE_CHECKBOX,true,wxPG_RECURSE);
     @endcode

+    
+    Following will set all individual bool properties in your control to
+    use check box:
+    
+    @code
+        pg->SetPropertyAttributeAll(wxPG_BOOL_USE_CHECKBOX, true);
+    @endcode

 
 

-  - Default item names for wxBoolProperty are [wxT("False"),wxT("True")]. This can be
-    changed using wxPropertyGrid::SetBoolChoices(trueChoice,falseChoice).
+  - Default item names for wxBoolProperty are ["False", "True"]. This can be
+    changed using static function wxPropertyGrid::SetBoolChoices(trueChoice,
+    falseChoice).

 
 @subsection propgrid_textctrlupdates Updates from wxTextCtrl Based Editor
 
 
 @subsection propgrid_textctrlupdates Updates from wxTextCtrl Based Editor
 


@@ -1082,7 +867,7 @@ splitter position, especially when sizers are being used.
 
 @subsection propgrid_colourproperty wxColourProperty and wxSystemColourProperty
 
 
 @subsection propgrid_colourproperty wxColourProperty and wxSystemColourProperty
 

-Through subclassing, these two property classes provide substantial customization
+Through sub-classing, these two property classes provide substantial customization

 features. Subclass wxSystemColourProperty if you want to use wxColourPropertyValue
 (which features colour type in addition to wxColour), and wxColourProperty if plain
 wxColour is enough.
 features. Subclass wxSystemColourProperty if you want to use wxColourPropertyValue
 (which features colour type in addition to wxColour), and wxColourProperty if plain
 wxColour is enough.