include/wx/menu.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/menu.h
   3 // Purpose:     wxMenu and wxMenuBar classes
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     26.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWindows team
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_MENU_H_BASE_
  13 #define _WX_MENU_H_BASE_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "menubase.h"
  17 #endif
  18
  19 #if wxUSE_MENUS
  20
  21 // ----------------------------------------------------------------------------
  22 // headers
  23 // ----------------------------------------------------------------------------
  24
  25 #include "wx/list.h"        // for "template" list classes
  26 #include "wx/window.h"      // base class for wxMenuBar
  27
  28 // also include this one to ensure compatibility with old code which only
  29 // included wx/menu.h
  30 #include "wx/menuitem.h"
  31
  32 class WXDLLEXPORT wxMenu;
  33 class WXDLLEXPORT wxMenuBarBase;
  34 class WXDLLEXPORT wxMenuBar;
  35 class WXDLLEXPORT wxMenuItem;
  36
  37 // pseudo template list classes
  38 WX_DECLARE_EXPORTED_LIST(wxMenu, wxMenuList);
  39 WX_DECLARE_EXPORTED_LIST(wxMenuItem, wxMenuItemList);
  40
  41 // ----------------------------------------------------------------------------
  42 // conditional compilation
  43 // ----------------------------------------------------------------------------
  44
  45 // having callbacks in menus is a wxWin 1.6x feature which should be replaced
  46 // with event tables in wxWin 2.xx code - however provide it because many
  47 // people like it a lot by default
  48 #ifndef wxUSE_MENU_CALLBACK
  49     #if WXWIN_COMPATIBILITY_2
  50         #define wxUSE_MENU_CALLBACK 1
  51     #else
  52         #define wxUSE_MENU_CALLBACK 0
  53     #endif // WXWIN_COMPATIBILITY_2
  54 #endif // !defined(wxUSE_MENU_CALLBACK)
  55
  56 // ----------------------------------------------------------------------------
  57 // wxMenu
  58 // ----------------------------------------------------------------------------
  59
  60 class WXDLLEXPORT wxMenuBase : public wxEvtHandler
  61 {
  62 public:
  63     // create a menu
  64     static wxMenu *New(const wxString& title = wxEmptyString, long style = 0);
  65
  66     // ctors
  67     wxMenuBase(const wxString& title, long style = 0) : m_title(title)
  68         { Init(style); }
  69     wxMenuBase(long style = 0)
  70         { Init(style); }
  71
  72     // dtor deletes all the menu items we own
  73     virtual ~wxMenuBase();
  74
  75     // menu construction
  76     // -----------------
  77
  78     // append a normal item to the menu
  79     void Append(int id,
  80                 const wxString& text,
  81                 const wxString& help = wxEmptyString,
  82                 bool isCheckable = FALSE)
  83     {
  84         DoAppend(wxMenuItem::New((wxMenu *)this, id, text, help, isCheckable));
  85     }
  86
  87     // append a separator to the menu
  88     void AppendSeparator() { Append(wxID_SEPARATOR, wxEmptyString); }
  89
  90     // append a submenu
  91     void Append(int id,
  92                 const wxString& text,
  93                 wxMenu *submenu,
  94                 const wxString& help = wxEmptyString)
  95     {
  96         DoAppend(wxMenuItem::New((wxMenu *)this, id, text, help, FALSE, submenu));
  97     }
  98
  99     // the most generic form of Append() - append anything
 100     void Append(wxMenuItem *item) { DoAppend(item); }
 101
 102     // insert a break in the menu (only works when appending the items, not
 103     // inserting them)
 104     virtual void Break() { }
 105
 106     // insert an item before given position
 107     bool Insert(size_t pos, wxMenuItem *item);
 108     void Insert(size_t pos,
 109                 int id,
 110                 const wxString& text,
 111                 const wxString& help = wxEmptyString,
 112                 bool isCheckable = FALSE)
 113     {
 114         Insert(pos, wxMenuItem::New((wxMenu *)this, id, text, help, isCheckable));
 115     }
 116
 117     // insert a separator
 118     void InsertSeparator(size_t pos)
 119     {
 120         Insert(pos, wxMenuItem::New((wxMenu *)this));
 121     }
 122
 123     // insert a submenu
 124     void Insert(size_t pos,
 125                 int id,
 126                 const wxString& text,
 127                 wxMenu *submenu,
 128                 const wxString& help = wxEmptyString)
 129     {
 130         Insert(pos, wxMenuItem::New((wxMenu *)this, id, text, help, FALSE, submenu));
 131     }
 132
 133     // prepend an item to the menu
 134     void Prepend(wxMenuItem *item)
 135     {
 136         Insert(0u, item);
 137     }
 138
 139     void Prepend(int id,
 140                  const wxString& text,
 141                  const wxString& help = wxEmptyString,
 142                  bool isCheckable = FALSE)
 143     {
 144         Insert(0u, id, text, help, isCheckable);
 145     }
 146
 147     // insert a separator
 148     void PrependSeparator()
 149     {
 150         InsertSeparator(0u);
 151     }
 152
 153     // insert a submenu
 154     void Prepend(int id,
 155                  const wxString& text,
 156                  wxMenu *submenu,
 157                  const wxString& help = wxEmptyString)
 158     {
 159         Insert(0u, id, text, submenu, help);
 160     }
 161
 162     // detach an item from the menu, but don't delete it so that it can be
 163     // added back later (but if it's not, the caller is responsible for
 164     // deleting it!)
 165     wxMenuItem *Remove(int id) { return Remove(FindChildItem(id)); }
 166     wxMenuItem *Remove(wxMenuItem *item);
 167
 168     // delete an item from the menu (submenus are not destroyed by this
 169     // function, see Destroy)
 170     bool Delete(int id) { return Delete(FindChildItem(id)); }
 171     bool Delete(wxMenuItem *item);
 172
 173     // delete the item from menu and destroy it (if it's a submenu)
 174     bool Destroy(int id) { return Destroy(FindChildItem(id)); }
 175     bool Destroy(wxMenuItem *item);
 176
 177     // menu items access
 178     // -----------------
 179
 180     // get the items
 181     size_t GetMenuItemCount() const { return m_items.GetCount(); }
 182
 183     const wxMenuItemList& GetMenuItems() const { return m_items; }
 184     wxMenuItemList& GetMenuItems() { return m_items; }
 185
 186     // search
 187     virtual int FindItem(const wxString& item) const;
 188     wxMenuItem* FindItem(int id, wxMenu **menu = NULL) const;
 189
 190     // get/set items attributes
 191     void Enable(int id, bool enable);
 192     bool IsEnabled(int id) const;
 193
 194     void Check(int id, bool check);
 195     bool IsChecked(int id) const;
 196
 197     void SetLabel(int id, const wxString& label);
 198     wxString GetLabel(int id) const;
 199
 200     virtual void SetHelpString(int id, const wxString& helpString);
 201     virtual wxString GetHelpString(int id) const;
 202
 203     // misc accessors
 204     // --------------
 205
 206     // the title
 207     virtual void SetTitle(const wxString& title) { m_title = title; }
 208     const wxString GetTitle() const { return m_title; }
 209
 210     // event handler
 211     void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
 212     wxEvtHandler *GetEventHandler() const { return m_eventHandler; }
 213
 214     // invoking window
 215     void SetInvokingWindow(wxWindow *win) { m_invokingWindow = win; }
 216     wxWindow *GetInvokingWindow() const { return m_invokingWindow; }
 217
 218     // style
 219     long GetStyle() const { return m_style; }
 220
 221     // implementation helpers
 222     // ----------------------
 223
 224     // Updates the UI for a menu and all submenus recursively. source is the
 225     // object that has the update event handlers defined for it. If NULL, the
 226     // menu or associated window will be used.
 227     void UpdateUI(wxEvtHandler* source = (wxEvtHandler*)NULL);
 228
 229     // get the menu bar this menu is attached to (may be NULL, always NULL for
 230     // popup menus)
 231     wxMenuBar *GetMenuBar() const { return m_menuBar; }
 232
 233     // called when the menu is attached/detached to/from a menu bar
 234     virtual void Attach(wxMenuBarBase *menubar);
 235     virtual void Detach();
 236
 237     // is the menu attached to a menu bar (or is it a popup one)?
 238     bool IsAttached() const { return m_menuBar != NULL; }
 239
 240     // set/get the parent of this menu
 241     void SetParent(wxMenu *parent) { m_menuParent = parent; }
 242     wxMenu *GetParent() const { return m_menuParent; }
 243
 244 #if WXWIN_COMPATIBILITY
 245     // compatibility: these functions are deprecated, use the new ones instead
 246     bool Enabled(int id) const { return IsEnabled(id); }
 247     bool Checked(int id) const { return IsChecked(id); }
 248
 249     wxMenuItem* FindItemForId(int itemId, wxMenu **itemMenu) const
 250         { return FindItem(itemId, itemMenu); }
 251
 252     wxList& GetItems() const { return (wxList &)m_items; }
 253 #endif // WXWIN_COMPATIBILITY
 254
 255 #if wxUSE_MENU_CALLBACK || defined(__WXMOTIF__)
 256     // wxWin 1.6x compatible menu event handling
 257     wxFunction GetCallback() const { return m_callback; }
 258     void Callback(const wxFunction func) { m_callback = func; }
 259
 260     wxFunction m_callback;
 261 #endif // wxUSE_MENU_CALLBACK
 262
 263     // unlike FindItem(), this function doesn't recurse but only looks through
 264     // our direct children and also may return the index of the found child if
 265     // pos != NULL
 266     wxMenuItem *FindChildItem(int id, size_t *pos = NULL) const;
 267
 268     // called to generate a wxCommandEvent, return TRUE if it was processed,
 269     // FALSE otherwise
 270     //
 271     // the checked parameter may have boolean value or -1 for uncheckable items
 272     bool SendEvent(int id, int checked = -1);
 273
 274 protected:
 275     // virtuals to override in derived classes
 276     // ---------------------------------------
 277
 278     virtual bool DoAppend(wxMenuItem *item);
 279     virtual bool DoInsert(size_t pos, wxMenuItem *item);
 280
 281     virtual wxMenuItem *DoRemove(wxMenuItem *item);
 282     virtual bool DoDelete(wxMenuItem *item);
 283     virtual bool DoDestroy(wxMenuItem *item);
 284
 285     // helpers
 286     // -------
 287
 288     // common part of all ctors
 289     void Init(long style);
 290
 291     // associate the submenu with this menu
 292     void AddSubMenu(wxMenu *submenu);
 293
 294     wxMenuBar     *m_menuBar;           // menubar we belong to or NULL
 295     wxMenu        *m_menuParent;        // parent menu or NULL
 296
 297     wxString       m_title;             // the menu title or label
 298     wxMenuItemList m_items;             // the list of menu items
 299
 300     wxWindow      *m_invokingWindow;    // for popup menus
 301
 302     long           m_style;             // combination of wxMENU_XXX flags
 303
 304     wxEvtHandler  *m_eventHandler;      // a pluggable in event handler
 305 };
 306
 307 // ----------------------------------------------------------------------------
 308 // wxMenuBar
 309 // ----------------------------------------------------------------------------
 310
 311 class WXDLLEXPORT wxMenuBarBase : public wxWindow
 312 {
 313 public:
 314     // default ctor
 315     wxMenuBarBase();
 316
 317     // dtor will delete all menus we own
 318     virtual ~wxMenuBarBase();
 319
 320     // menu bar construction
 321     // ---------------------
 322
 323     // append a menu to the end of menubar, return TRUE if ok
 324     virtual bool Append(wxMenu *menu, const wxString& title);
 325
 326     // insert a menu before the given position into the menubar, return TRUE
 327     // if inserted ok
 328     virtual bool Insert(size_t pos, wxMenu *menu, const wxString& title);
 329
 330     // menu bar items access
 331     // ---------------------
 332
 333     // get the number of menus in the menu bar
 334     size_t GetMenuCount() const { return m_menus.GetCount(); }
 335
 336     // get the menu at given position
 337     wxMenu *GetMenu(size_t pos) const;
 338
 339     // replace the menu at given position with another one, returns the
 340     // previous menu (which should be deleted by the caller)
 341     virtual wxMenu *Replace(size_t pos, wxMenu *menu, const wxString& title);
 342
 343     // delete the menu at given position from the menu bar, return the pointer
 344     // to the menu (which should be  deleted by the caller)
 345     virtual wxMenu *Remove(size_t pos);
 346
 347     // enable or disable a submenu
 348     virtual void EnableTop(size_t pos, bool enable) = 0;
 349
 350     // is the menu enabled?
 351     virtual bool IsEnabledTop(size_t WXUNUSED(pos)) const { return TRUE; }
 352
 353     // get or change the label of the menu at given position
 354     virtual void SetLabelTop(size_t pos, const wxString& label) = 0;
 355     virtual wxString GetLabelTop(size_t pos) const = 0;
 356
 357     // item search
 358     // -----------
 359
 360     // by menu and item names, returns wxNOT_FOUND if not found or id of the
 361     // found item
 362     virtual int FindMenuItem(const wxString& menu, const wxString& item) const;
 363
 364     // find item by id (in any menu), returns NULL if not found
 365     //
 366     // if menu is !NULL, it will be filled with wxMenu this item belongs to
 367     virtual wxMenuItem* FindItem(int id, wxMenu **menu = NULL) const;
 368
 369     // find menu by its caption, return wxNOT_FOUND on failure
 370     int FindMenu(const wxString& title) const;
 371
 372     // item access
 373     // -----------
 374
 375     // all these functions just use FindItem() and then call an appropriate
 376     // method on it
 377     //
 378     // NB: under MSW, these methods can only be used after the menubar had
 379     //     been attached to the frame
 380
 381     void Enable(int id, bool enable);
 382     void Check(int id, bool check);
 383     bool IsChecked(int id) const;
 384     bool IsEnabled(int id) const;
 385
 386     void SetLabel(int id, const wxString &label);
 387     wxString GetLabel(int id) const;
 388
 389     void SetHelpString(int id, const wxString& helpString);
 390     wxString GetHelpString(int id) const;
 391
 392     // implementation helpers
 393
 394     // get the frame we are attached to (may return NULL)
 395     wxFrame *GetFrame() const { return m_menuBarFrame; }
 396
 397     // returns TRUE if we're attached to a frame
 398     bool IsAttached() const { return GetFrame() != NULL; }
 399
 400     // associate the menubar with the frame
 401     virtual void Attach(wxFrame *frame);
 402
 403     // called before deleting the menubar normally
 404     virtual void Detach();
 405
 406     // need to override these ones to avoid virtual function hiding
 407     virtual bool Enable(bool enable = TRUE) { return wxWindow::Enable(enable); }
 408     virtual void SetLabel(const wxString& s) { wxWindow::SetLabel(s); }
 409     virtual wxString GetLabel() const { return wxWindow::GetLabel(); }
 410
 411     // don't want menu bars to accept the focus by tabbing to them
 412     virtual bool AcceptsFocusFromKeyboard() const { return FALSE; }
 413
 414     // compatibility only: these functions are deprecated, use the new ones
 415     // instead
 416 #if WXWIN_COMPATIBILITY
 417     bool Enabled(int id) const { return IsEnabled(id); }
 418     bool Checked(int id) const { return IsChecked(id); }
 419
 420     wxMenuItem* FindMenuItemById(int id) const
 421         { return FindItem(id); }
 422     wxMenuItem* FindItemForId(int id, wxMenu **menu = NULL) const
 423         { return FindItem(id, menu); }
 424 #endif // WXWIN_COMPATIBILITY
 425
 426 protected:
 427     // the list of all our menus
 428     wxMenuList m_menus;
 429
 430     // the frame we are attached to (may be NULL)
 431     wxFrame *m_menuBarFrame;
 432 };
 433
 434 // ----------------------------------------------------------------------------
 435 // include the real class declaration
 436 // ----------------------------------------------------------------------------
 437
 438 #ifdef wxUSE_BASE_CLASSES_ONLY
 439     #define wxMenuItem wxMenuItemBase
 440 #else // !wxUSE_BASE_CLASSES_ONLY
 441 #if defined(__WXUNIVERSAL__)
 442     #include "wx/univ/menu.h"
 443 #elif defined(__WXMSW__)
 444     #include "wx/msw/menu.h"
 445 #elif defined(__WXMOTIF__)
 446     #include "wx/motif/menu.h"
 447 #elif defined(__WXGTK__)
 448     #include "wx/gtk/menu.h"
 449 #elif defined(__WXMAC__)
 450     #include "wx/mac/menu.h"
 451 #elif defined(__WXPM__)
 452     #include "wx/os2/menu.h"
 453 #elif defined(__WXSTUBS__)
 454     #include "wx/stubs/menu.h"
 455 #endif
 456 #endif // wxUSE_BASE_CLASSES_ONLY/!wxUSE_BASE_CLASSES_ONLY
 457
 458 #endif // wxUSE_MENUS
 459
 460 #endif
 461     // _WX_MENU_H_BASE_