X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/98ba1eee5d1b107e66c9fd28963b95f46fdefe89..e87d78bb36f371d593137761158118fb09b69fa2:/docs/doxygen/overviews/dialog.h diff --git a/docs/doxygen/overviews/dialog.h b/docs/doxygen/overviews/dialog.h index 00f07aa906..c9e49067b8 100644 --- a/docs/doxygen/overviews/dialog.h +++ b/docs/doxygen/overviews/dialog.h @@ -3,126 +3,136 @@ // Purpose: topic overview // Author: wxWidgets team // RCS-ID: $Id$ -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -/*! +/** + +@page overview_dialog wxDialog Overview + +@tableofcontents + +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. + +For a set of dialog convenience functions, including file selection, see +@ref group_funcmacro_dialog. + +See also wxTopLevelWindow and wxWindow for inherited member functions. +Validation of data in controls is covered in @ref overview_validator. + - @page overview_dialog wxDialog overview - Classes: wxDialog, wxDialogLayoutAdapter +@section overview_dialog_autoscrolling Automatic Scrolled 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. - 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: +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. - @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. +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: - For a set of dialog convenience functions, including file selection, see - @ref overview_dialogfunctions. +@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. - See also wxTopLevelWindow and wxWindow for inherited - member functions. Validation of data in controls is covered in @ref overview_validator. +@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. - @section overview_dialog_autoscrolling Automatic scrolling dialogs +You can use wxDialog::AddMainButtonId to add identifiers for buttons that +should also be treated as standard buttons for the non-scrolling area. - 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. +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. - 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. +You can also override wxDialog::CanDoLayoutAdaptation and +wxDialog::DoLayoutAdaptation in a class derived from wxDialog. - 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: - @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_fail Where Scrolling Adaptation May Fail +Because adaptation rearranges your sizer and window hierarchy, it is not +fool-proof, and may fail in the following situations: - @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 - 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. - - - @subsection overview_dialog_autoscrolling_fail 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: - - @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. - - - @subsection overview_dialog_propertysheet 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. +@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. + + +@subsection overview_dialog_propertysheet 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. */ -