/////////////////////////////////////////////////////////////////////////////
-// Name: dialog
+// Name: dialog.h
// Purpose: topic overview
// Author: wxWidgets team
// RCS-ID: $Id$
/*!
- @page dialog_overview wxDialog overview
+ @page overview_dialog wxDialog overview
+
+ Classes: wxDialog, wxDialogLayoutAdapter
- Classes: #wxDialog, #wxDialogLayoutAdapter
A dialog box is similar to a panel, in that it is a window which can
be used for placing controls, with the following exceptions:
+ @li A surrounding frame is implicitly created.
+ @li Extra functionality is automatically given to the dialog box,
+ such as tabbing between items (currently Windows only).
+ @li If the dialog box is @e modal, the calling program is blocked
+ until the dialog box is dismissed.
- A surrounding frame is implicitly created.
- Extra functionality is automatically given to the dialog box,
- such as tabbing between items (currently Windows only).
- If the dialog box is @e modal, the calling program is blocked
- until the dialog box is dismissed.
+ For a set of dialog convenience functions, including file selection, see
+ @ref overview_dialogfunctions.
+ See also wxTopLevelWindow and wxWindow for inherited
+ member functions. Validation of data in controls is covered in @ref overview_validator.
+
+
+
+ @section overview_dialog_autoscrolling Automatic scrolling dialogs
+
+ As an ever greater variety of mobile hardware comes to market, it becomes more
+ imperative for wxWidgets applications to adapt to these platforms without putting
+ too much burden on the programmer. One area where wxWidgets can help is in adapting
+ dialogs for the lower resolution screens that inevitably accompany a smaller form factor.
+ wxDialog therefore supplies a global wxDialogLayoutAdapter class that implements
+ automatic scrolling adaptation for most sizer-based custom dialogs.
+
+ Many applications should therefore be able to adapt to small displays with little
+ or no work, as far as dialogs are concerned.
+ By default this adaptation is off. To switch scrolling adaptation on globally in
+ your application, call the static function wxDialog::EnableLayoutAdaptation passing @true.
+ You can also adjust adaptation on a per-dialog basis by calling
+ wxDialog::SetLayoutAdaptationMode with one of @c wxDIALOG_ADAPTATION_MODE_DEFAULT
+ (use the global setting), @c wxDIALOG_ADAPTATION_MODE_ENABLED or @c wxDIALOG_ADAPTATION_MODE_DISABLED.
- For a set of dialog convenience functions, including file selection, see
- @ref dialogfunctions_overview.
- See also #wxTopLevelWindow and #wxWindow for inherited
- member functions. Validation of data in controls is covered in @ref validator_overview.
- @ref autoscrollingdialogs_overview
-
-
- @section autoscrollingdialogs Automatic scrolling dialogs
-
- As an ever greater variety of mobile hardware comes to market, it becomes more imperative for wxWidgets applications to adapt
- to these platforms without putting too much burden on the programmer. One area where wxWidgets can help is in adapting
- dialogs for the lower resolution screens that inevitably accompany a smaller form factor. wxDialog therefore supplies
- a global #wxDialogLayoutAdapter class that implements automatic scrolling adaptation for most sizer-based custom dialogs.
- Many applications should therefore be able to adapt to small displays with little or no work, as far as dialogs are concerned.
- By default this adaptation is off. To switch scrolling adaptation on globally in your application, call the static function
- wxDialog::EnableLayoutAdaptation passing @true. You can also adjust adaptation on a per-dialog basis by calling
- wxDialog::SetLayoutAdaptationMode with one of @c wxDIALOG_ADAPTATION_MODE_DEFAULT (use the global setting), @c wxDIALOG_ADAPTATION_MODE_ENABLED or @c wxDIALOG_ADAPTATION_MODE_DISABLED.
The last two modes override the global adaptation setting.
With adaptation enabled, if the display size is too small for the dialog, wxWidgets (or rather the
- standard adapter class wxStandardDialogLayoutAdapter) will
- make part of the dialog scrolling, leaving standard buttons in a non-scrolling part at the bottom of the dialog.
- This is done as follows, in wxDialogLayoutAdapter::DoLayoutAdaptation called from within wxDialog::Show or wxDialog::ShowModal:
-
-
- If wxDialog::GetContentWindow returns a window derived from wxBookCtrlBase, the pages are made scrollable and
- no other adaptation is done.
- wxWidgets looks for a #wxStdDialogButtonSizer and uses it for the non-scrolling part.
- If that search failed, wxWidgets looks for a horizontal #wxBoxSizer with one or more
- standard buttons, with identifiers such as @c wxID_OK and @c wxID_CANCEL.
- If that search failed too, wxWidgets finds 'loose' standard buttons (in any kind of sizer) and adds them to a #wxStdDialogButtonSizer.
- If no standard buttons were found, the whole dialog content will scroll.
- All the children apart from standard buttons are reparented onto a new #wxScrolledWindow object,
- using the old top-level sizer for the scrolled window and creating a new top-level sizer to lay out the scrolled window and
- standard button sizer.
-
-
- @b Customising scrolling adaptation
- In addition to switching adaptation on and off globally and per dialog, you can choose how aggressively wxWidgets will
- search for standard buttons by setting wxDialog::SetLayoutAdaptationLevel. By default,
- all the steps described above will be performed but by setting the level to 1, for example, you can choose to only look for wxStdDialogButtonSizer.
+ standard adapter class wxStandardDialogLayoutAdapter) will make part of the dialog scrolling,
+ leaving standard buttons in a non-scrolling part at the bottom of the dialog.
+ This is done as follows, in wxDialogLayoutAdapter::DoLayoutAdaptation called from
+ within wxDialog::Show or wxDialog::ShowModal:
+
+ @li If wxDialog::GetContentWindow returns a window derived from wxBookCtrlBase,
+ the pages are made scrollable and no other adaptation is done.
+ @li wxWidgets looks for a wxStdDialogButtonSizer and uses it for the non-scrolling part.
+ @li If that search failed, wxWidgets looks for a horizontal wxBoxSizer with one or more
+ standard buttons, with identifiers such as @c wxID_OK and @c wxID_CANCEL.
+ @li If that search failed too, wxWidgets finds 'loose' standard buttons (in any kind of sizer)
+ and adds them to a wxStdDialogButtonSizer.
+ If no standard buttons were found, the whole dialog content will scroll.
+ @li All the children apart from standard buttons are reparented onto a new wxScrolledWindow
+ object, using the old top-level sizer for the scrolled window and creating a new top-level
+ sizer to lay out the scrolled window and standard button sizer.
+
+
+ @subsection overview_dialog_autoscrolling_custom Customising scrolling adaptation
+
+ In addition to switching adaptation on and off globally and per dialog,
+ you can choose how aggressively wxWidgets will search for standard buttons by setting
+ wxDialog::SetLayoutAdaptationLevel. By default, all the steps described above will be
+ performed but by setting the level to 1, for example, you can choose to only look for
+ wxStdDialogButtonSizer.
+
You can use wxDialog::AddMainButtonId to add identifiers for buttons that should also be
treated as standard buttons for the non-scrolling area.
- You can derive your own class from #wxDialogLayoutAdapter or wxStandardDialogLayoutAdapter and call
+
+ You can derive your own class from wxDialogLayoutAdapter or wxStandardDialogLayoutAdapter and call
wxDialog::SetLayoutAdapter, deleting the old object that this function returns. Override
- the functions CanDoLayoutAdaptation and DoLayoutAdaptation to test for adaptation applicability and perform the adaptation.
- You can also override wxDialog::CanDoLayoutAdaptation and wxDialog::DoLayoutAdaptation in a class derived from wxDialog.
- @b Situations where automatic scrolling adaptation may fail
- Because adaptation rearranges your sizer and window hierarchy, it is not fool-proof, and may fail in the following situations.
+ the functions CanDoLayoutAdaptation and DoLayoutAdaptation to test for adaptation applicability
+ and perform the adaptation.
+
+ You can also override wxDialog::CanDoLayoutAdaptation and wxDialog::DoLayoutAdaptation
+ in a class derived from wxDialog.
+
+ @subsection overview_dialog_autoscrolling_fail Situations where automatic scrolling adaptation may fail
- The dialog doesn't use sizers.
- The dialog implementation makes assumptions about the window hierarchy, for example getting the parent of a control and casting to the dialog class.
- The dialog does custom painting and/or event handling not handled by the scrolled window. If this problem can be solved globally,
- you can derive a new adapter class from wxStandardDialogLayoutAdapter and override its CreateScrolledWindow function to return an instance of your own class.
- The dialog has unusual layout, for example a vertical sizer containing a mixture of standard buttons and other controls.
- The dialog makes assumptions about the sizer hierarchy, for example to show or hide children of the top-level sizer. However, the original sizer hierarchy will still hold
- until Show or ShowModal is called.
+ Because adaptation rearranges your sizer and window hierarchy, it is not fool-proof,
+ and may fail in the following situations:
+ @li The dialog doesn't use sizers.
+ @li The dialog implementation makes assumptions about the window hierarchy,
+ for example getting the parent of a control and casting to the dialog class.
+ @li The dialog does custom painting and/or event handling not handled by the scrolled window.
+ If this problem can be solved globally, you can derive a new adapter class from
+ wxStandardDialogLayoutAdapter and override its CreateScrolledWindow function to return
+ an instance of your own class.
+ @li The dialog has unusual layout, for example a vertical sizer containing a mixture of
+ standard buttons and other controls.
+ @li The dialog makes assumptions about the sizer hierarchy, for example to show or hide
+ children of the top-level sizer. However, the original sizer hierarchy will still hold
+ until Show or ShowModal is called.
You can help make sure that your dialogs will continue to function after adaptation by:
+ @li avoiding the above situations and assumptions;
+ @li using wxStdDialogButtonSizer;
+ @li only making assumptions about hierarchy immediately after the dialog is created;
+ @li using an intermediate sizer under the main sizer, a @false top-level sizer that
+ can be relied on to exist for the purposes of manipulating child sizers and windows;
+ @li overriding wxDialog::GetContentWindow to return a book control if your dialog implements
+ pages: wxWidgets will then only make the pages scrollable.
- avoiding the above situations and assumptions;
- using #wxStdDialogButtonSizer;
- only making assumptions about hierarchy immediately after the dialog is created;
- using an intermediate sizer under the main sizer, a @false top-level sizer that can be relied on to exist
- for the purposes of manipulating child sizers and windows;
- overriding wxDialog::GetContentWindow to return a book control if your dialog implements pages: wxWidgets will then only make the pages
- scrollable.
+ @subsection overview_dialog_propertysheet wxPropertySheetDialog and wxWizard
- @b wxPropertySheetDialog and wxWizard
- Adaptation for wxPropertySheetDialog is always done by simply making the pages scrollable, since wxDialog::GetContentWindow returns
- the dialog's book control and this is handled by the standard layout adapter.
- wxWizard uses its own CanDoLayoutAdaptation and DoLayoutAdaptation functions rather than the global adapter: again, only the wizard pages are made scrollable.
+ Adaptation for wxPropertySheetDialog is always done by simply making the pages
+ scrollable, since wxDialog::GetContentWindow returns the dialog's book control and
+ this is handled by the standard layout adapter.
- */
+ wxWizard uses its own CanDoLayoutAdaptation and DoLayoutAdaptation functions rather
+ than the global adapter: again, only the wizard pages are made scrollable.
+*/
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