// Purpose: topic overview
// Author: wxWidgets team
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
@li @ref propgrid_validating
@li @ref propgrid_populating
@li @ref propgrid_cellrender
+@li @ref propgrid_keyhandling
@li @ref propgrid_customizing
@li @ref propgrid_usage2
@li @ref propgrid_subclassing
@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.
+Properties store their values internally as wxVariant, but is also possible to
+obtain them as wxAny, using implicit conversion. You can get property
+values with wxPGProperty::GetValue() and
+wxPropertyGridInterface::GetPropertyValue().
+
+Below is a code example which handles wxEVT_PG_CHANGED event:
+
+@code
+
+void MyWindowClass::OnPropertyGridChanged(wxPropertyGridEvent& event)
+{
+ wxPGProperty* property = event.GetProperty();
+
+ // Do nothing if event did not have associated property
+ if ( !property )
+ return;
+
+ // GetValue() returns wxVariant, but it is converted transparently to
+ // wxAny
+ wxAny value = property->GetValue();
+
+ // Also, handle the case where property value is unspecified
+ if ( value.IsNull() )
+ return;
+
+ // Handle changes in values, as needed
+ if ( property.GetName() == "MyStringProperty" )
+ OnMyStringPropertyChanged(value.As<wxString>());
+ else if ( property.GetName() == "MyColourProperty" )
+ OnMyColourPropertyChanged(value.As<wxColour>());
+}
+
+@endcode
+
+You can get a string-representation of property's value using
+wxPGProperty::GetValueAsString() or
+wxPropertyGridInterface::GetPropertyValueAsString(). This particular function
+is very safe to use with any kind of property.
+
+@note There is a one case in which you may want to take extra care when
+ dealing with raw wxVariant values. That is, integer-type properties,
+ such as 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. However, you can also
+ bypass this problem by using wxAny in your code instead of wxVariant.
Note that in some cases property value can be Null variant, which means
that property value is unspecified. This usually occurs only when
@endcode
-<b>wxPython Note:</b> Instead of ++ operator, use Next() method, and instead of
+@beginWxPythonOnly
+PropertyGridInterface has some useful pythonic iterators as attributes.
+@c Properties lets you iterate through all items that are not category
+captions or private children. @c Items lets you iterate through everything
+except private children. Also, there are GetPyIterator() and GetPyVIterator(),
+which return pythonic iterators instead of normal wxPropertyGridIterator.
+
+If you need to use C++ style iterators in wxPython code, note that
+Instead of ++ operator, use Next() method, and instead of
* operator, use GetProperty() method.
+@endWxPythonOnly
GetIterator() only works with wxPropertyGrid and the individual pages
of wxPropertyGridManager. In order to iterate through an arbitrary
event.Veto();
event.SetValidationFailureBehavior(wxPG_VFB_STAY_IN_PROPERTY |
wxPG_VFB_BEEP |
- wxPG_VFB_SHOW_MESSAGE);
+ wxPG_VFB_SHOW_MESSAGEBOX);
}
}
}
In addition, it is possible to control these characteristics for
wxPGChoices list items. See wxPGChoices class reference for more info.
+@section propgrid_keyhandling Customizing Keyboard Handling
+
+There is probably one preference for keyboard handling for every developer
+out there, and as a conveniency control wxPropertyGrid tries to cater for
+that. By the default arrow keys are used for navigating between properties,
+and TAB key is used to move focus between the property editor and the
+first column. When the focus is in the editor, arrow keys usually no longer
+work for navigation since they are consumed by the editor.
+
+There are mainly two functions which you can use this customize things,
+wxPropertyGrid::AddActionTrigger() and wxPropertyGrid::DedicateKey().
+First one can be used to set a navigation event to occur on a specific key
+press and the second is used to divert a key from property editors, making it
+possible for the grid to use keys normally consumed by the focused editors.
+
+For example, let's say you want to have an ENTER-based editing scheme. That
+is, editor is focused on ENTER press and the next property is selected when
+the user finishes editing and presses ENTER again. Code like this would
+accomplish the task:
+
+@code
+ // Have property editor focus on Enter
+ propgrid->AddActionTrigger( wxPG_ACTION_EDIT, WXK_RETURN );
+
+ // Have Enter work as action trigger even when editor is focused
+ propgrid->DedicateKey( WXK_RETURN );
+
+ // Let Enter also navigate to the next property
+ propgrid->AddActionTrigger( wxPG_ACTION_NEXT_PROPERTY, WXK_RETURN );
+
+@endcode
+
+wxPG_ACTION_EDIT is prioritized above wxPG_ACTION_NEXT_PROPERTY so that the
+above code can work without conflicts. For a complete list of available
+actions, see @ref propgrid_keyboard_actions.
+
+Here's another trick. Normally the up and down cursor keys are consumed by
+the focused wxTextCtrl editor and as such can't be used for navigating between
+properties when that editor is focused. However, using DedicateKey() we can
+change this so that instead of the cursor keys moving the caret inside the
+wxTextCtrl, they navigate between adjacent properties. As such:
+
+@code
+ propgrid->DedicateKey(WXK_UP);
+ propgrid->DedicateKey(WXK_DOWN);
+@endcode
+
@section propgrid_customizing Customizing Properties (without sub-classing)
In this section are presented miscellaneous ways to have custom appearance
-and behavior for your properties without all the necessary hassle
+and behaviour for your properties without all the necessary hassle
of sub-classing a property class etc.
@subsection propgrid_customimage Setting Value Image
the sizer setup and SetSize calls!</b> (ie. usually at the end of the
frame/dialog constructor)
- Splitter centering behavior can be customized using
+ Splitter centering behaviour can be customized using
wxPropertyGridInterface::SetColumnProportion(). Usually it is used to set
non-equal column proportions, which in essence stops the splitter(s) from
being 'centered' as such, and instead just auto-resized.
incompatible changes from version 1.4, which had a stable API and will remain
as the last separate branch.
-Note that in general any behavior-breaking changes should not compile or run
+Note that in general any behaviour-breaking changes should not compile or run
without warnings or errors.
@subsection propgrid_compat_general General Changes
with keyboard. This change allowed fixing broken tab traversal on wxGTK
(which is open issue in wxPropertyGrid 1.4).
+ - wxPG_EX_UNFOCUS_ON_ENTER style is removed and is now default behaviour.
+ That is, when enter is pressed, editing is considered done and focus
+ moves back to the property grid from the editor control.
+
- A few member functions were removed from wxPropertyGridInterface.
Please use wxPGProperty's counterparts from now on.
- - wxPGChoices now has proper Copy-On-Write behavior.
+ - wxPGChoices now has proper Copy-On-Write behaviour.
- wxPGChoices::SetExclusive() was renamed to AllocExclusive().
now use wxPropertyGridInterface::GetEditableState() instead.
- wxPG_EX_DISABLE_TLP_TRACKING is now enabled by default. To get the old
- behavior (recommended if you don't use a system that reparents the grid
+ behaviour (recommended if you don't use a system that reparents the grid
on its own), use the wxPG_EX_ENABLE_TLP_TRACKING extra style.
- Extended window style wxPG_EX_LEGACY_VALIDATORS was removed.
+ - Default property validation failure behaviour has been changed to
+ (wxPG_VFB_MARK_CELL | wxPG_VFB_SHOW_MESSAGEBOX), which means that the
+ cell is marked red and wxMessageBox is shown. This is more user-friendly
+ than the old behaviour, which simply beeped and prevented leaving the
+ property editor until a valid value was entered.
+
- wxPropertyGridManager now has same Get/SetSelection() semantics as
wxPropertyGrid.
- Various wxPropertyGridManager page-related functions now return pointer
to the page object instead of index.
+ - wxArrayEditorDialog used by wxArrayStringProperty and some sample
+ properties has been renamed to wxPGArrayEditorDialog. Also, it now uses
+ wxEditableListBox for editing.
+
- Instead of calling wxPropertyGrid::SetButtonShortcut(), use
wxPropertyGrid::SetActionTrigger(wxPG_ACTION_PRESS_BUTTON).
- wxPropertyGrid::CanClose() has been removed. Call
wxPropertyGridInterface::EditorValidate() instead.
+ - wxPGProperty::SetFlag() has been moved to private API. This was done to
+ underline the fact that it was not the preferred method to change a
+ property's state since it never had any desired side-effects. ChangeFlag()
+ still exists for those who really need to achieve the same effect.
+
+ - wxArrayStringProperty default delimiter is now comma (','), and it can
+ be changed by setting the new "Delimiter" attribute.
+
@subsection propgrid_compat_propdev Property and Editor Sub-classing Changes
- Confusing custom property macros have been eliminated.
projects / wxWidgets.git / blobdiff