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git.saurik.com Git - wxWidgets.git/blob - interface/wx/menu.h
1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: interface of wxMenuBar
4 // Author: wxWidgets team
6 // Licence: wxWindows license
7 /////////////////////////////////////////////////////////////////////////////
12 A menu bar is a series of menus accessible from the top of a frame.
15 To respond to a menu selection, provide a handler for EVT_MENU, in the frame
16 that contains the menu bar.
18 If you have a toolbar which uses the same identifiers as your EVT_MENU entries,
19 events from the toolbar will also be processed by your EVT_MENU event handlers.
21 Tip: under Windows, if you discover that menu shortcuts (for example, Alt-F
22 to show the file menu) are not working, check any EVT_CHAR events you are
23 handling in child windows.
24 If you are not calling event.Skip() for events that you don't process in
25 these event handlers, menu shortcuts may cease to work.
30 @see wxMenu, @ref overview_events
32 class wxMenuBar
: public wxWindow
36 Construct an empty menu bar.
39 If wxMB_DOCKABLE the menu bar can be detached (wxGTK only).
41 wxMenuBar(long style
= 0);
44 Construct a menu bar from arrays of menus and titles.
49 An array of menus. Do not use this array again - it now belongs to
52 An array of title strings. Deallocate this array after creating
55 If wxMB_DOCKABLE the menu bar can be detached (wxGTK only).
58 Not supported by wxPerl.
61 wxMenuBar(size_t n
, wxMenu
* menus
[], const wxString titles
[],
65 Destructor, destroying the menu bar and removing it from the parent
71 Adds the item to the end of the menu bar.
74 The menu to add. Do not deallocate this menu after calling Append().
76 The title of the menu, must be non-empty.
78 @return @true on success, @false if an error occurred.
82 virtual bool Append(wxMenu
* menu
, const wxString
& title
);
85 Checks or unchecks a menu item.
88 The menu item identifier.
90 If @true, checks the menu item, otherwise the item is unchecked.
92 @remarks Only use this when the menu bar has been associated with a
93 frame; otherwise, use the wxMenu equivalent call.
95 void Check(int id
, bool check
);
98 Enables or disables (greys out) a menu item.
101 The menu item identifier.
103 @true to enable the item, @false to disable it.
105 @remarks Only use this when the menu bar has been associated with a
106 frame; otherwise, use the wxMenu equivalent call.
108 void Enable(int id
, bool enable
);
111 Enables or disables a whole menu.
114 The position of the menu, starting from zero.
116 @true to enable the menu, @false to disable it.
118 @remarks Only use this when the menu bar has been associated with a frame.
120 virtual void EnableTop(size_t pos
, bool enable
);
123 Finds the menu item object associated with the given menu item identifier.
126 Menu item identifier.
128 If not @NULL, menu will get set to the associated menu.
130 @return The found menu item object, or @NULL if one was not found.
133 In wxPerl this method takes just the @a id parameter;
134 in scalar context it returns the associated @c Wx::MenuItem, in list
135 context it returns a 2-element list (item, submenu).
138 virtual wxMenuItem
* FindItem(int id
, wxMenu
* menu
= NULL
) const;
141 Returns the index of the menu with the given @a title or @c wxNOT_FOUND if no
142 such menu exists in this menubar.
144 The @a title parameter may specify either the menu title
145 (with accelerator characters, i.e. @c "&File") or just the
146 menu label (@c "File") indifferently.
148 int FindMenu(const wxString
& title
) const;
151 Finds the menu item id for a menu name/menu item string pair.
158 @return The menu item identifier, or wxNOT_FOUND if none was found.
160 @remarks Any special menu codes are stripped out of source and target
161 strings before matching.
163 virtual int FindMenuItem(const wxString
& menuString
,
164 const wxString
& itemString
) const;
167 Gets the help string associated with the menu item identifier.
170 The menu item identifier.
172 @return The help string, or the empty string if there was no help string
173 or the menu item was not found.
177 wxString
GetHelpString(int id
) const;
180 Gets the label associated with a menu item.
183 The menu item identifier.
185 @return The menu item label, or the empty string if the item was not
188 @remarks Use only after the menubar has been associated with a frame.
190 wxString
GetLabel(int id
) const;
193 Returns the label of a top-level menu. Note that the returned string does not
194 include the accelerator characters which could have been specified in the menu
195 title string during its construction.
198 Position of the menu on the menu bar, starting from zero.
200 @return The menu label, or the empty string if the menu was not found.
202 @remarks Use only after the menubar has been associated with a frame.
205 This function is deprecated in favour of GetMenuLabel() and GetMenuLabelText().
209 wxString
GetLabelTop(size_t pos
) const;
212 Returns the menu at @a menuIndex (zero-based).
214 wxMenu
* GetMenu(size_t menuIndex
) const;
217 Returns the number of menus in this menubar.
219 size_t GetMenuCount() const;
222 Returns the label of a top-level menu. Note that the returned string
223 includes the accelerator characters that have been specified in the menu
224 title string during its construction.
227 Position of the menu on the menu bar, starting from zero.
229 @return The menu label, or the empty string if the menu was not found.
231 @remarks Use only after the menubar has been associated with a frame.
233 @see GetMenuLabelText(), SetMenuLabel()
235 virtual wxString
GetMenuLabel(size_t pos
) const;
238 Returns the label of a top-level menu. Note that the returned string does not
239 include any accelerator characters that may have been specified in the menu
240 title string during its construction.
243 Position of the menu on the menu bar, starting from zero.
245 @return The menu label, or the empty string if the menu was not found.
247 @remarks Use only after the menubar has been associated with a frame.
249 @see GetMenuLabel(), SetMenuLabel()
251 virtual wxString
GetMenuLabelText(size_t pos
) const;
254 Inserts the menu at the given position into the menu bar. Inserting menu at
255 position 0 will insert it in the very beginning of it, inserting at position
256 GetMenuCount() is the same as calling Append().
259 The position of the new menu in the menu bar
261 The menu to add. wxMenuBar owns the menu and will free it.
263 The title of the menu.
265 @return @true on success, @false if an error occurred.
269 virtual bool Insert(size_t pos
, wxMenu
* menu
, const wxString
& title
);
272 Determines whether an item is checked.
275 The menu item identifier.
277 @return @true if the item was found and is checked, @false otherwise.
279 bool IsChecked(int id
) const;
282 Determines whether an item is enabled.
285 The menu item identifier.
287 @return @true if the item was found and is enabled, @false otherwise.
289 bool IsEnabled(int id
) const;
294 virtual void Refresh(bool eraseBackground
= true, const wxRect
* rect
= NULL
);
297 Removes the menu from the menu bar and returns the menu object - the caller
298 is responsible for deleting it. This function may be used together with
299 Insert() to change the menubar dynamically.
303 virtual wxMenu
* Remove(size_t pos
);
306 Replaces the menu at the given position with another one.
309 The position of the new menu in the menu bar
313 The title of the menu.
315 @return The menu which was previously at position pos.
316 The caller is responsible for deleting it.
318 @see Insert(), Remove()
320 virtual wxMenu
* Replace(size_t pos
, wxMenu
* menu
, const wxString
& title
);
323 Sets the help string associated with a menu item.
326 Menu item identifier.
328 Help string to associate with the menu item.
332 void SetHelpString(int id
, const wxString
& helpString
);
335 Sets the label of a menu item.
338 Menu item identifier.
342 @remarks Use only after the menubar has been associated with a frame.
346 void SetLabel(int id
, const wxString
& label
);
349 Sets the label of a top-level menu.
352 The position of a menu on the menu bar, starting from zero.
356 @remarks Use only after the menubar has been associated with a frame.
359 This function has been deprecated in favour of SetMenuLabel().
363 void SetLabelTop(size_t pos
, const wxString
& label
);
366 Sets the label of a top-level menu.
369 The position of a menu on the menu bar, starting from zero.
373 @remarks Use only after the menubar has been associated with a frame.
375 virtual void SetMenuLabel(size_t pos
, const wxString
& label
);
383 A menu is a popup (or pull down) list of items, one of which may be
384 selected before the menu goes away (clicking elsewhere dismisses the
385 menu). Menus may be used to construct either menu bars or popup menus.
387 A menu item has an integer ID associated with it which can be used to
388 identify the selection, or to change the menu item in some way. A menu item
389 with a special identifier -1 is a separator item and doesn't have an
390 associated command but just makes a separator line appear in the menu.
393 Please note that @e wxID_ABOUT and @e wxID_EXIT are predefined by wxWidgets
394 and have a special meaning since entries using these IDs will be taken out
395 of the normal menus under MacOS X and will be inserted into the system menu
396 (following the appropriate MacOS X interface guideline).
397 On PalmOS @e wxID_EXIT is disabled according to Palm OS Companion guidelines.
399 Menu items may be either @e normal items, @e check items or @e radio items.
400 Normal items don't have any special properties while the check items have a
401 boolean flag associated to them and they show a checkmark in the menu when
403 wxWidgets automatically toggles the flag value when the item is clicked and its
404 value may be retrieved using either wxMenu::IsChecked method of wxMenu or
405 wxMenuBar itself or by using wxEvent::IsChecked when you get the menu
406 notification for the item in question.
408 The radio items are similar to the check items except that all the other items
409 in the same radio group are unchecked when a radio item is checked. The radio
410 group is formed by a contiguous range of radio items, i.e. it starts at the
411 first item of this kind and ends with the first item of a different kind (or
412 the end of the menu). Notice that because the radio groups are defined in terms
413 of the item positions inserting or removing the items in the menu containing
414 the radio items risks to not work correctly.
417 @section menu_allocation Allocation strategy
419 All menus must be created on the @b heap because all menus attached to a
420 menubar or to another menu will be deleted by their parent when it is
421 deleted. The only exception to this rule are the popup menus (i.e. menus
422 used with wxWindow::PopupMenu()) as wxWidgets does not destroy them to
423 allow reusing the same menu more than once. But the exception applies only
424 to the menus themselves and not to any submenus of popup menus which are
425 still destroyed by wxWidgets as usual and so must be heap-allocated.
427 As the frame menubar is deleted by the frame itself, it means that normally
428 all menus used are deleted automatically.
431 @section menu_eventhandling Event handling
433 If the menu is part of a menubar, then wxMenuBar event processing is used.
435 With a popup menu (see wxWindow::PopupMenu), there is a variety of ways to
436 handle a menu selection event (@c wxEVT_COMMAND_MENU_SELECTED):
437 - Provide @c EVT_MENU handlers in the window which pops up the menu, or in an
438 ancestor of that window (the simplest method);
439 - Derive a new class from wxMenu and define event table entries using the @c EVT_MENU macro;
440 - Set a new event handler for wxMenu, through wxEvtHandler::SetNextHandler,
441 specifying an object whose class has @c EVT_MENU entries;
443 Note that instead of static @c EVT_MENU macros you can also use dynamic
444 connection; see @ref overview_events_bind.
449 @see wxMenuBar, wxWindow::PopupMenu, @ref overview_events,
450 @ref wxFileHistory "wxFileHistory (most recently used files menu)"
452 class wxMenu
: public wxEvtHandler
456 Constructs a wxMenu object.
459 If set to wxMENU_TEAROFF, the menu will be detachable (wxGTK only).
464 Constructs a wxMenu object with a title.
467 Title at the top of the menu (not always supported).
469 If set to wxMENU_TEAROFF, the menu will be detachable (wxGTK only).
471 wxMenu(const wxString
& title
, long style
= 0);
474 Destructor, destroying the menu.
477 Under Motif, a popup menu must have a valid parent (the window
478 it was last popped up on) when being destroyed. Therefore, make sure
479 you delete or re-use the popup menu @e before destroying the parent
480 window. Re-use in this context means popping up the menu on a different
481 window from last time, which causes an implicit destruction and
482 recreation of internal data structures.
490 The menu command identifier.
492 The string to appear on the menu item.
493 See wxMenuItem::SetItemLabel() for more details.
495 An optional help string associated with the item.
496 By default, the handler for the @c wxEVT_MENU_HIGHLIGHT event displays
497 this string in the status line.
499 May be @c wxITEM_SEPARATOR, @c wxITEM_NORMAL, @c wxITEM_CHECK or @c wxITEM_RADIO.
503 m_pFileMenu->Append(ID_NEW_FILE, "&New file\tCTRL+N", "Creates a new XYZ document");
505 or even better for stock menu items (see wxMenuItem::wxMenuItem):
507 m_pFileMenu->Append(wxID_NEW, "", "Creates a new XYZ document");
511 This command can be used after the menu has been shown, as well as on
512 initial creation of a menu or menubar.
514 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
515 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
516 SetHelpString(), wxMenuItem
518 wxMenuItem
* Append(int id
, const wxString
& item
= wxEmptyString
,
519 const wxString
& helpString
= wxEmptyString
,
520 wxItemKind kind
= wxITEM_NORMAL
);
525 @deprecated This function is deprecated, use AppendSubMenu() instead.
528 The menu command identifier.
530 The string to appear on the menu item.
534 An optional help string associated with the item.
535 By default, the handler for the wxEVT_MENU_HIGHLIGHT event displays
536 this string in the status line.
538 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
539 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
540 SetHelpString(), wxMenuItem
542 wxMenuItem
* Append(int id
, const wxString
& item
, wxMenu
* subMenu
,
543 const wxString
& helpString
= wxEmptyString
);
546 Adds a menu item object.
548 This is the most generic variant of Append() method because it may be
549 used for both items (including separators) and submenus and because
550 you can also specify various extra properties of a menu item this way,
551 such as bitmaps and fonts.
554 A menuitem object. It will be owned by the wxMenu object after this
555 function is called, so do not delete it yourself.
558 See the remarks for the other Append() overloads.
560 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
561 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
562 SetHelpString(), wxMenuItem
564 wxMenuItem
* Append(wxMenuItem
* menuItem
);
567 Adds a checkable item to the end of the menu.
569 @see Append(), InsertCheckItem()
571 wxMenuItem
* AppendCheckItem(int id
, const wxString
& item
,
572 const wxString
& help
= wxEmptyString
);
575 Adds a radio item to the end of the menu.
576 All consequent radio items form a group and when an item in the group is
577 checked, all the others are automatically unchecked.
579 @note Radio items are not supported under wxMotif.
581 @see Append(), InsertRadioItem()
583 wxMenuItem
* AppendRadioItem(int id
, const wxString
& item
,
584 const wxString
& help
= wxEmptyString
);
587 Adds a separator to the end of the menu.
589 @see Append(), InsertSeparator()
591 wxMenuItem
* AppendSeparator();
594 Adds the given @a submenu to this menu. @a text is the text shown in the
595 menu for it and @a help is the help string shown in the status bar when the
596 submenu item is selected.
598 wxMenuItem
* AppendSubMenu(wxMenu
* submenu
, const wxString
& text
,
599 const wxString
& help
= wxEmptyString
);
602 Inserts a break in a menu, causing the next appended item to appear in
605 virtual void Break();
608 Checks or unchecks the menu item.
611 The menu item identifier.
613 If @true, the item will be checked, otherwise it will be unchecked.
617 void Check(int id
, bool check
);
620 Deletes the menu item from the menu. If the item is a submenu, it will
621 @b not be deleted. Use Destroy() if you want to delete a submenu.
624 Id of the menu item to be deleted.
626 @see FindItem(), Destroy(), Remove()
631 Deletes the menu item from the menu. If the item is a submenu, it will
632 @b not be deleted. Use Destroy() if you want to delete a submenu.
635 Menu item to be deleted.
637 @see FindItem(), Destroy(), Remove()
639 bool Delete(wxMenuItem
* item
);
642 Deletes the menu item from the menu. If the item is a submenu, it will
643 be deleted. Use Remove() if you want to keep the submenu (for example,
647 Id of the menu item to be deleted.
649 @see FindItem(), Deletes(), Remove()
651 bool Destroy(int id
);
654 Deletes the menu item from the menu. If the item is a submenu, it will
655 be deleted. Use Remove() if you want to keep the submenu (for example,
659 Menu item to be deleted.
661 @see FindItem(), Deletes(), Remove()
663 bool Destroy(wxMenuItem
* item
);
666 Enables or disables (greys out) a menu item.
669 The menu item identifier.
671 @true to enable the menu item, @false to disable it.
675 void Enable(int id
, bool enable
);
678 Finds the menu item object associated with the given menu item identifier
679 and, optionally, the position of the item in the menu.
681 Unlike FindItem(), this function doesn't recurse but only looks at the
682 direct children of this menu.
685 The identifier of the menu item to find.
687 If the pointer is not @NULL, it is filled with the item's position if
688 it was found or @c (size_t)wxNOT_FOUND otherwise.
690 Menu item object or @NULL if not found.
692 wxMenuItem
*FindChildItem(int id
, size_t *pos
= NULL
) const;
695 Finds the menu id for a menu item string.
698 Menu item string to find.
700 @return Menu item identifier, or wxNOT_FOUND if none is found.
702 @remarks Any special menu codes are stripped out of source and target
703 strings before matching.
705 virtual int FindItem(const wxString
& itemString
) const;
708 Finds the menu item object associated with the given menu item identifier and,
709 optionally, the (sub)menu it belongs to.
712 Menu item identifier.
714 If the pointer is not @NULL, it will be filled with the item's
715 parent menu (if the item was found)
717 @return Menu item object or NULL if none is found.
719 wxMenuItem
* FindItem(int id
, wxMenu
** menu
= NULL
) const;
722 Returns the wxMenuItem given a position in the menu.
724 wxMenuItem
* FindItemByPosition(size_t position
) const;
727 Returns the help string associated with a menu item.
730 The menu item identifier.
732 @return The help string, or the empty string if there is no help string
733 or the item was not found.
735 @see SetHelpString(), Append()
737 virtual wxString
GetHelpString(int id
) const;
740 Returns a menu item label.
743 The menu item identifier.
745 @return The item label, or the empty string if the item was not found.
747 @see GetLabelText(), SetLabel()
749 wxString
GetLabel(int id
) const;
752 Returns a menu item label, without any of the original mnemonics and
756 The menu item identifier.
758 @return The item label, or the empty string if the item was not found.
760 @see GetLabel(), SetLabel()
762 wxString
GetLabelText(int id
) const;
765 Returns the number of items in the menu.
767 size_t GetMenuItemCount() const;
771 Returns the list of items in the menu.
773 wxMenuItemList is a pseudo-template list class containing wxMenuItem
774 pointers, see wxList.
776 wxMenuItemList
& GetMenuItems() const;
777 const wxMenuItemList
& GetMenuItems() const;
781 Returns the title of the menu.
783 @remarks This is relevant only to popup menus, use
784 wxMenuBar::GetMenuLabel for the menus in the menubar.
788 const wxString
& GetTitle() const;
791 Inserts the given @a item before the position @a pos.
793 Inserting the item at position GetMenuItemCount() is the same
796 @see Append(), Prepend()
798 wxMenuItem
* Insert(size_t pos
, wxMenuItem
* item
);
801 Inserts the given @a item before the position @a pos.
803 Inserting the item at position GetMenuItemCount() is the same
806 @see Append(), Prepend()
808 wxMenuItem
* Insert(size_t pos
, int id
,
809 const wxString
& item
= wxEmptyString
,
810 const wxString
& helpString
= wxEmptyString
,
811 wxItemKind kind
= wxITEM_NORMAL
);
814 Inserts a checkable item at the given position.
816 @see Insert(), AppendCheckItem()
818 wxMenuItem
* InsertCheckItem(size_t pos
, int id
, const wxString
& item
,
819 const wxString
& helpString
= wxEmptyString
);
822 Inserts a radio item at the given position.
824 @see Insert(), AppendRadioItem()
826 wxMenuItem
* InsertRadioItem(size_t pos
, int id
, const wxString
& item
,
827 const wxString
& helpString
= wxEmptyString
);
830 Inserts a separator at the given position.
832 @see Insert(), AppendSeparator()
834 wxMenuItem
* InsertSeparator(size_t pos
);
837 Determines whether a menu item is checked.
840 The menu item identifier.
842 @return @true if the menu item is checked, @false otherwise.
846 bool IsChecked(int id
) const;
849 Determines whether a menu item is enabled.
852 The menu item identifier.
854 @return @true if the menu item is enabled, @false otherwise.
858 bool IsEnabled(int id
) const;
861 Inserts the given @a item at position 0, i.e. before all the other
864 @see Append(), Insert()
866 wxMenuItem
* Prepend(wxMenuItem
* item
);
869 Inserts the given @a item at position 0, i.e. before all the other
872 @see Append(), Insert()
874 wxMenuItem
* Prepend(int id
, const wxString
& item
= wxEmptyString
,
875 const wxString
& helpString
= wxEmptyString
,
876 wxItemKind kind
= wxITEM_NORMAL
);
879 Inserts a checkable item at position 0.
881 @see Prepend(), AppendCheckItem()
883 wxMenuItem
* PrependCheckItem(int id
, const wxString
& item
,
884 const wxString
& helpString
= wxEmptyString
);
887 Inserts a radio item at position 0.
889 @see Prepend(), AppendRadioItem()
891 wxMenuItem
* PrependRadioItem(int id
, const wxString
& item
,
892 const wxString
& helpString
= wxEmptyString
);
895 Inserts a separator at position 0.
897 @see Prepend(), AppendSeparator()
899 wxMenuItem
* PrependSeparator();
902 Removes the menu item from the menu but doesn't delete the associated C++
903 object. This allows you to reuse the same item later by adding it back to
904 the menu (especially useful with submenus).
907 The identifier of the menu item to remove.
909 @return A pointer to the item which was detached from the menu.
911 wxMenuItem
* Remove(int id
);
914 Removes the menu item from the menu but doesn't delete the associated C++
915 object. This allows you to reuse the same item later by adding it back to
916 the menu (especially useful with submenus).
919 The menu item to remove.
921 @return A pointer to the item which was detached from the menu.
923 wxMenuItem
* Remove(wxMenuItem
* item
);
926 Sets an item's help string.
929 The menu item identifier.
931 The help string to set.
935 virtual void SetHelpString(int id
, const wxString
& helpString
);
938 Sets the label of a menu item.
941 The menu item identifier.
943 The menu item label to set.
945 @see Append(), GetLabel()
947 void SetLabel(int id
, const wxString
& label
);
950 Sets the title of the menu.
955 @remarks This is relevant only to popup menus, use
956 wxMenuBar::SetLabelTop for the menus in the menubar.
960 virtual void SetTitle(const wxString
& title
);
963 Sends events to @a source (or owning window if @NULL) to update the
966 This is called just before the menu is popped up with wxWindow::PopupMenu,
967 but the application may call it at other times if required.
969 void UpdateUI(wxEvtHandler
* source
= NULL
);