Clarify wxMenu objects allocation rules.
[wxWidgets.git] / interface / wx / menu.h
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: menu.h
3 // Purpose: interface of wxMenuBar
4 // Author: wxWidgets team
5 // RCS-ID: $Id$
6 // Licence: wxWindows license
7 /////////////////////////////////////////////////////////////////////////////
8
9 /**
10 @class wxMenuBar
11
12 A menu bar is a series of menus accessible from the top of a frame.
13
14 @remarks
15 To respond to a menu selection, provide a handler for EVT_MENU, in the frame
16 that contains the menu bar.
17
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.
20
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.
26
27 @library{wxcore}
28 @category{menus}
29
30 @see wxMenu, @ref overview_events
31 */
32 class wxMenuBar : public wxWindow
33 {
34 public:
35 /**
36 Construct an empty menu bar.
37
38 @param style
39 If wxMB_DOCKABLE the menu bar can be detached (wxGTK only).
40 */
41 wxMenuBar(long style = 0);
42
43 /**
44 Construct a menu bar from arrays of menus and titles.
45
46 @param n
47 The number of menus.
48 @param menus
49 An array of menus. Do not use this array again - it now belongs to
50 the menu bar.
51 @param titles
52 An array of title strings. Deallocate this array after creating
53 the menu bar.
54 @param style
55 If wxMB_DOCKABLE the menu bar can be detached (wxGTK only).
56
57 @beginWxPerlOnly
58 Not supported by wxPerl.
59 @endWxPerlOnly
60 */
61 wxMenuBar(size_t n, wxMenu* menus[], const wxString titles[],
62 long style = 0);
63
64 /**
65 Destructor, destroying the menu bar and removing it from the parent
66 frame (if any).
67 */
68 virtual ~wxMenuBar();
69
70 /**
71 Adds the item to the end of the menu bar.
72
73 @param menu
74 The menu to add. Do not deallocate this menu after calling Append().
75 @param title
76 The title of the menu.
77
78 @return @true on success, @false if an error occurred.
79
80 @see Insert()
81 */
82 virtual bool Append(wxMenu* menu, const wxString& title);
83
84 /**
85 Checks or unchecks a menu item.
86
87 @param id
88 The menu item identifier.
89 @param check
90 If @true, checks the menu item, otherwise the item is unchecked.
91
92 @remarks Only use this when the menu bar has been associated with a
93 frame; otherwise, use the wxMenu equivalent call.
94 */
95 void Check(int id, bool check);
96
97 /**
98 Enables or disables (greys out) a menu item.
99
100 @param id
101 The menu item identifier.
102 @param enable
103 @true to enable the item, @false to disable it.
104
105 @remarks Only use this when the menu bar has been associated with a
106 frame; otherwise, use the wxMenu equivalent call.
107 */
108 void Enable(int id, bool enable);
109
110 /**
111 Enables or disables a whole menu.
112
113 @param pos
114 The position of the menu, starting from zero.
115 @param enable
116 @true to enable the menu, @false to disable it.
117
118 @remarks Only use this when the menu bar has been associated with a frame.
119 */
120 virtual void EnableTop(size_t pos, bool enable);
121
122 /**
123 Finds the menu item object associated with the given menu item identifier.
124
125 @param id
126 Menu item identifier.
127 @param menu
128 If not @NULL, menu will get set to the associated menu.
129
130 @return The found menu item object, or @NULL if one was not found.
131
132 @beginWxPerlOnly
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).
136 @endWxPerlOnly
137 */
138 virtual wxMenuItem* FindItem(int id, wxMenu* menu = NULL) const;
139
140 /**
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.
143
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.
147 */
148 int FindMenu(const wxString& title) const;
149
150 /**
151 Finds the menu item id for a menu name/menu item string pair.
152
153 @param menuString
154 Menu title to find.
155 @param itemString
156 Item to find.
157
158 @return The menu item identifier, or wxNOT_FOUND if none was found.
159
160 @remarks Any special menu codes are stripped out of source and target
161 strings before matching.
162 */
163 virtual int FindMenuItem(const wxString& menuString,
164 const wxString& itemString) const;
165
166 /**
167 Gets the help string associated with the menu item identifier.
168
169 @param id
170 The menu item identifier.
171
172 @return The help string, or the empty string if there was no help string
173 or the menu item was not found.
174
175 @see SetHelpString()
176 */
177 wxString GetHelpString(int id) const;
178
179 /**
180 Gets the label associated with a menu item.
181
182 @param id
183 The menu item identifier.
184
185 @return The menu item label, or the empty string if the item was not
186 found.
187
188 @remarks Use only after the menubar has been associated with a frame.
189 */
190 wxString GetLabel(int id) const;
191
192 /**
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.
196
197 @param pos
198 Position of the menu on the menu bar, starting from zero.
199
200 @return The menu label, or the empty string if the menu was not found.
201
202 @remarks Use only after the menubar has been associated with a frame.
203
204 @deprecated
205 This function is deprecated in favour of GetMenuLabel() and GetMenuLabelText().
206
207 @see SetLabelTop()
208 */
209 wxString GetLabelTop(size_t pos) const;
210
211 /**
212 Returns the menu at @a menuIndex (zero-based).
213 */
214 wxMenu* GetMenu(size_t menuIndex) const;
215
216 /**
217 Returns the number of menus in this menubar.
218 */
219 size_t GetMenuCount() const;
220
221 /**
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.
225
226 @param pos
227 Position of the menu on the menu bar, starting from zero.
228
229 @return The menu label, or the empty string if the menu was not found.
230
231 @remarks Use only after the menubar has been associated with a frame.
232
233 @see GetMenuLabelText(), SetMenuLabel()
234 */
235 virtual wxString GetMenuLabel(size_t pos) const;
236
237 /**
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.
241
242 @param pos
243 Position of the menu on the menu bar, starting from zero.
244
245 @return The menu label, or the empty string if the menu was not found.
246
247 @remarks Use only after the menubar has been associated with a frame.
248
249 @see GetMenuLabel(), SetMenuLabel()
250 */
251 virtual wxString GetMenuLabelText(size_t pos) const;
252
253 /**
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().
257
258 @param pos
259 The position of the new menu in the menu bar
260 @param menu
261 The menu to add. wxMenuBar owns the menu and will free it.
262 @param title
263 The title of the menu.
264
265 @return @true on success, @false if an error occurred.
266
267 @see Append()
268 */
269 virtual bool Insert(size_t pos, wxMenu* menu, const wxString& title);
270
271 /**
272 Determines whether an item is checked.
273
274 @param id
275 The menu item identifier.
276
277 @return @true if the item was found and is checked, @false otherwise.
278 */
279 bool IsChecked(int id) const;
280
281 /**
282 Determines whether an item is enabled.
283
284 @param id
285 The menu item identifier.
286
287 @return @true if the item was found and is enabled, @false otherwise.
288 */
289 bool IsEnabled(int id) const;
290
291 /**
292 Redraw the menu bar
293 */
294 virtual void Refresh(bool eraseBackground = true, const wxRect* rect = NULL);
295
296 /**
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.
300
301 @see Replace()
302 */
303 virtual wxMenu* Remove(size_t pos);
304
305 /**
306 Replaces the menu at the given position with another one.
307
308 @param pos
309 The position of the new menu in the menu bar
310 @param menu
311 The menu to add.
312 @param title
313 The title of the menu.
314
315 @return The menu which was previously at position pos.
316 The caller is responsible for deleting it.
317
318 @see Insert(), Remove()
319 */
320 virtual wxMenu* Replace(size_t pos, wxMenu* menu, const wxString& title);
321
322 /**
323 Sets the help string associated with a menu item.
324
325 @param id
326 Menu item identifier.
327 @param helpString
328 Help string to associate with the menu item.
329
330 @see GetHelpString()
331 */
332 void SetHelpString(int id, const wxString& helpString);
333
334 /**
335 Sets the label of a menu item.
336
337 @param id
338 Menu item identifier.
339 @param label
340 Menu item label.
341
342 @remarks Use only after the menubar has been associated with a frame.
343
344 @see GetLabel()
345 */
346 void SetLabel(int id, const wxString& label);
347
348 /**
349 Sets the label of a top-level menu.
350
351 @param pos
352 The position of a menu on the menu bar, starting from zero.
353 @param label
354 The menu label.
355
356 @remarks Use only after the menubar has been associated with a frame.
357
358 @deprecated
359 This function has been deprecated in favour of SetMenuLabel().
360
361 @see GetLabelTop()
362 */
363 void SetLabelTop(size_t pos, const wxString& label);
364
365 /**
366 Sets the label of a top-level menu.
367
368 @param pos
369 The position of a menu on the menu bar, starting from zero.
370 @param label
371 The menu label.
372
373 @remarks Use only after the menubar has been associated with a frame.
374 */
375 virtual void SetMenuLabel(size_t pos, const wxString& label);
376 };
377
378
379
380 /**
381 @class wxMenu
382
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.
386
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.
391
392 @note
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.
398
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
402 the flag is set.
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.
407
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.
415
416
417 @section menu_allocation Allocation strategy
418
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.
426
427 As the frame menubar is deleted by the frame itself, it means that normally
428 all menus used are deleted automatically.
429
430
431 @section menu_eventhandling Event handling
432
433 If the menu is part of a menubar, then wxMenuBar event processing is used.
434
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;
442
443 Note that instead of static @c EVT_MENU macros you can also use dynamic
444 connection; see @ref overview_events_bind.
445
446 @library{wxcore}
447 @category{menus}
448
449 @see wxMenuBar, wxWindow::PopupMenu, @ref overview_events,
450 @ref wxFileHistory "wxFileHistory (most recently used files menu)"
451 */
452 class wxMenu : public wxEvtHandler
453 {
454 public:
455 /**
456 Constructs a wxMenu object.
457
458 @param style
459 If set to wxMENU_TEAROFF, the menu will be detachable (wxGTK only).
460 */
461 wxMenu(long style);
462
463 /**
464 Constructs a wxMenu object with a title.
465
466 @param title
467 Title at the top of the menu (not always supported).
468 @param style
469 If set to wxMENU_TEAROFF, the menu will be detachable (wxGTK only).
470 */
471 wxMenu(const wxString& title, long style = 0);
472
473 /**
474 Destructor, destroying the menu.
475
476 @note
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.
483 */
484 virtual ~wxMenu();
485
486 /**
487 Adds a menu item.
488
489 @param id
490 The menu command identifier.
491 @param item
492 The string to appear on the menu item.
493 See wxMenuItem::SetItemLabel() for more details.
494 @param helpString
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.
498 @param kind
499 May be @c wxITEM_SEPARATOR, @c wxITEM_NORMAL, @c wxITEM_CHECK or @c wxITEM_RADIO.
500
501 Example:
502 @code
503 m_pFileMenu->Append(ID_NEW_FILE, "&New file\tCTRL+N", "Creates a new XYZ document");
504 @endcode
505 or even better for stock menu items (see wxMenuItem::wxMenuItem):
506 @code
507 m_pFileMenu->Append(wxID_NEW, "", "Creates a new XYZ document");
508 @endcode
509
510 @remarks
511 This command can be used after the menu has been shown, as well as on
512 initial creation of a menu or menubar.
513
514 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
515 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
516 SetHelpString(), wxMenuItem
517 */
518 wxMenuItem* Append(int id, const wxString& item = wxEmptyString,
519 const wxString& helpString = wxEmptyString,
520 wxItemKind kind = wxITEM_NORMAL);
521
522 /**
523 Adds a submenu.
524
525 @deprecated This function is deprecated, use AppendSubMenu() instead.
526
527 @param id
528 The menu command identifier.
529 @param item
530 The string to appear on the menu item.
531 @param subMenu
532 Pull-right submenu.
533 @param helpString
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.
537
538 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
539 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
540 SetHelpString(), wxMenuItem
541 */
542 wxMenuItem* Append(int id, const wxString& item, wxMenu* subMenu,
543 const wxString& helpString = wxEmptyString);
544
545 /**
546 Adds a menu item object.
547
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.
552
553 @param menuItem
554 A menuitem object. It will be owned by the wxMenu object after this
555 function is called, so do not delete it yourself.
556
557 @remarks
558 See the remarks for the other Append() overloads.
559
560 @see AppendSeparator(), AppendCheckItem(), AppendRadioItem(),
561 AppendSubMenu(), Insert(), SetLabel(), GetHelpString(),
562 SetHelpString(), wxMenuItem
563 */
564 wxMenuItem* Append(wxMenuItem* menuItem);
565
566 /**
567 Adds a checkable item to the end of the menu.
568
569 @see Append(), InsertCheckItem()
570 */
571 wxMenuItem* AppendCheckItem(int id, const wxString& item,
572 const wxString& help = wxEmptyString);
573
574 /**
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.
578
579 @note Radio items are not supported under wxMotif.
580
581 @see Append(), InsertRadioItem()
582 */
583 wxMenuItem* AppendRadioItem(int id, const wxString& item,
584 const wxString& help = wxEmptyString);
585
586 /**
587 Adds a separator to the end of the menu.
588
589 @see Append(), InsertSeparator()
590 */
591 wxMenuItem* AppendSeparator();
592
593 /**
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.
597 */
598 wxMenuItem* AppendSubMenu(wxMenu* submenu, const wxString& text,
599 const wxString& help = wxEmptyString);
600
601 /**
602 Inserts a break in a menu, causing the next appended item to appear in
603 a new column.
604 */
605 virtual void Break();
606
607 /**
608 Checks or unchecks the menu item.
609
610 @param id
611 The menu item identifier.
612 @param check
613 If @true, the item will be checked, otherwise it will be unchecked.
614
615 @see IsChecked()
616 */
617 void Check(int id, bool check);
618
619 /**
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.
622
623 @param id
624 Id of the menu item to be deleted.
625
626 @see FindItem(), Destroy(), Remove()
627 */
628 bool Delete(int id);
629
630 /**
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.
633
634 @param item
635 Menu item to be deleted.
636
637 @see FindItem(), Destroy(), Remove()
638 */
639 bool Delete(wxMenuItem* item);
640
641 /**
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,
644 to reuse it later).
645
646 @param id
647 Id of the menu item to be deleted.
648
649 @see FindItem(), Deletes(), Remove()
650 */
651 bool Destroy(int id);
652
653 /**
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,
656 to reuse it later).
657
658 @param item
659 Menu item to be deleted.
660
661 @see FindItem(), Deletes(), Remove()
662 */
663 bool Destroy(wxMenuItem* item);
664
665 /**
666 Enables or disables (greys out) a menu item.
667
668 @param id
669 The menu item identifier.
670 @param enable
671 @true to enable the menu item, @false to disable it.
672
673 @see IsEnabled()
674 */
675 void Enable(int id, bool enable);
676
677 /**
678 Finds the menu item object associated with the given menu item identifier
679 and, optionally, the position of the item in the menu.
680
681 Unlike FindItem(), this function doesn't recurse but only looks at the
682 direct children of this menu.
683
684 @param id
685 The identifier of the menu item to find.
686 @param pos
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.
689 @return
690 Menu item object or @NULL if not found.
691 */
692 wxMenuItem *FindChildItem(int id, size_t *pos = NULL) const;
693
694 /**
695 Finds the menu id for a menu item string.
696
697 @param itemString
698 Menu item string to find.
699
700 @return Menu item identifier, or wxNOT_FOUND if none is found.
701
702 @remarks Any special menu codes are stripped out of source and target
703 strings before matching.
704 */
705 virtual int FindItem(const wxString& itemString) const;
706
707 /**
708 Finds the menu item object associated with the given menu item identifier and,
709 optionally, the (sub)menu it belongs to.
710
711 @param id
712 Menu item identifier.
713 @param menu
714 If the pointer is not @NULL, it will be filled with the item's
715 parent menu (if the item was found)
716
717 @return Menu item object or NULL if none is found.
718 */
719 wxMenuItem* FindItem(int id, wxMenu** menu = NULL) const;
720
721 /**
722 Returns the wxMenuItem given a position in the menu.
723 */
724 wxMenuItem* FindItemByPosition(size_t position) const;
725
726 /**
727 Returns the help string associated with a menu item.
728
729 @param id
730 The menu item identifier.
731
732 @return The help string, or the empty string if there is no help string
733 or the item was not found.
734
735 @see SetHelpString(), Append()
736 */
737 virtual wxString GetHelpString(int id) const;
738
739 /**
740 Returns a menu item label.
741
742 @param id
743 The menu item identifier.
744
745 @return The item label, or the empty string if the item was not found.
746
747 @see GetLabelText(), SetLabel()
748 */
749 wxString GetLabel(int id) const;
750
751 /**
752 Returns a menu item label, without any of the original mnemonics and
753 accelerators.
754
755 @param id
756 The menu item identifier.
757
758 @return The item label, or the empty string if the item was not found.
759
760 @see GetLabel(), SetLabel()
761 */
762 wxString GetLabelText(int id) const;
763
764 /**
765 Returns the number of items in the menu.
766 */
767 size_t GetMenuItemCount() const;
768
769 //@{
770 /**
771 Returns the list of items in the menu.
772
773 wxMenuItemList is a pseudo-template list class containing wxMenuItem
774 pointers, see wxList.
775 */
776 wxMenuItemList& GetMenuItems() const;
777 const wxMenuItemList& GetMenuItems() const;
778 //@}
779
780 /**
781 Returns the title of the menu.
782
783 @remarks This is relevant only to popup menus, use
784 wxMenuBar::GetMenuLabel for the menus in the menubar.
785
786 @see SetTitle()
787 */
788 const wxString& GetTitle() const;
789
790 /**
791 Inserts the given @a item before the position @a pos.
792
793 Inserting the item at position GetMenuItemCount() is the same
794 as appending it.
795
796 @see Append(), Prepend()
797 */
798 wxMenuItem* Insert(size_t pos, wxMenuItem* item);
799
800 /**
801 Inserts the given @a item before the position @a pos.
802
803 Inserting the item at position GetMenuItemCount() is the same
804 as appending it.
805
806 @see Append(), Prepend()
807 */
808 wxMenuItem* Insert(size_t pos, int id,
809 const wxString& item = wxEmptyString,
810 const wxString& helpString = wxEmptyString,
811 wxItemKind kind = wxITEM_NORMAL);
812
813 /**
814 Inserts a checkable item at the given position.
815
816 @see Insert(), AppendCheckItem()
817 */
818 wxMenuItem* InsertCheckItem(size_t pos, int id, const wxString& item,
819 const wxString& helpString = wxEmptyString);
820
821 /**
822 Inserts a radio item at the given position.
823
824 @see Insert(), AppendRadioItem()
825 */
826 wxMenuItem* InsertRadioItem(size_t pos, int id, const wxString& item,
827 const wxString& helpString = wxEmptyString);
828
829 /**
830 Inserts a separator at the given position.
831
832 @see Insert(), AppendSeparator()
833 */
834 wxMenuItem* InsertSeparator(size_t pos);
835
836 /**
837 Determines whether a menu item is checked.
838
839 @param id
840 The menu item identifier.
841
842 @return @true if the menu item is checked, @false otherwise.
843
844 @see Check()
845 */
846 bool IsChecked(int id) const;
847
848 /**
849 Determines whether a menu item is enabled.
850
851 @param id
852 The menu item identifier.
853
854 @return @true if the menu item is enabled, @false otherwise.
855
856 @see Enable()
857 */
858 bool IsEnabled(int id) const;
859
860 /**
861 Inserts the given @a item at position 0, i.e. before all the other
862 existing items.
863
864 @see Append(), Insert()
865 */
866 wxMenuItem* Prepend(wxMenuItem* item);
867
868 /**
869 Inserts the given @a item at position 0, i.e. before all the other
870 existing items.
871
872 @see Append(), Insert()
873 */
874 wxMenuItem* Prepend(int id, const wxString& item = wxEmptyString,
875 const wxString& helpString = wxEmptyString,
876 wxItemKind kind = wxITEM_NORMAL);
877
878 /**
879 Inserts a checkable item at position 0.
880
881 @see Prepend(), AppendCheckItem()
882 */
883 wxMenuItem* PrependCheckItem(int id, const wxString& item,
884 const wxString& helpString = wxEmptyString);
885
886 /**
887 Inserts a radio item at position 0.
888
889 @see Prepend(), AppendRadioItem()
890 */
891 wxMenuItem* PrependRadioItem(int id, const wxString& item,
892 const wxString& helpString = wxEmptyString);
893
894 /**
895 Inserts a separator at position 0.
896
897 @see Prepend(), AppendSeparator()
898 */
899 wxMenuItem* PrependSeparator();
900
901 /**
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).
905
906 @param id
907 The identifier of the menu item to remove.
908
909 @return A pointer to the item which was detached from the menu.
910 */
911 wxMenuItem* Remove(int id);
912
913 /**
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).
917
918 @param item
919 The menu item to remove.
920
921 @return A pointer to the item which was detached from the menu.
922 */
923 wxMenuItem* Remove(wxMenuItem* item);
924
925 /**
926 Sets an item's help string.
927
928 @param id
929 The menu item identifier.
930 @param helpString
931 The help string to set.
932
933 @see GetHelpString()
934 */
935 virtual void SetHelpString(int id, const wxString& helpString);
936
937 /**
938 Sets the label of a menu item.
939
940 @param id
941 The menu item identifier.
942 @param label
943 The menu item label to set.
944
945 @see Append(), GetLabel()
946 */
947 void SetLabel(int id, const wxString& label);
948
949 /**
950 Sets the title of the menu.
951
952 @param title
953 The title to set.
954
955 @remarks This is relevant only to popup menus, use
956 wxMenuBar::SetLabelTop for the menus in the menubar.
957
958 @see GetTitle()
959 */
960 virtual void SetTitle(const wxString& title);
961
962 /**
963 Sends events to @a source (or owning window if @NULL) to update the
964 menu UI.
965
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.
968 */
969 void UpdateUI(wxEvtHandler* source = NULL);
970 };
971