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 any kind of item (normal/check/radio/separator)
  79     void Append(int id,
  80                 const wxString& text,
  81                 const wxString& help = wxEmptyString,
  82                 wxItemKind kind = wxItem_Normal)
  83     {
  84         DoAppend(wxMenuItem::New((wxMenu *)this, id, text, help, kind));
  85     }
  86
  87     // append a separator to the menu
  88     void AppendSeparator() { Append(wxID_SEPARATOR, wxEmptyString); }
  89
  90     // append a check item
  91     void AppendCheckItem(int id,
  92                          const wxString& text,
  93                          const wxString& help = wxEmptyString)
  94     {
  95         Append(id, text, help, wxItem_Check);
  96     }
  97
  98     // append a radio item
  99     void AppendRadioItem(int id,
 100                          const wxString& text,
 101                          const wxString& help = wxEmptyString)
 102     {
 103         Append(id, text, help, wxItem_Radio);
 104     }
 105
 106     // append a submenu
 107     void Append(int id,
 108                 const wxString& text,
 109                 wxMenu *submenu,
 110                 const wxString& help = wxEmptyString)
 111     {
 112         DoAppend(wxMenuItem::New((wxMenu *)this, id, text, help,
 113                                  wxItem_Normal, submenu));
 114     }
 115
 116     // the most generic form of Append() - append anything
 117     void Append(wxMenuItem *item) { DoAppend(item); }
 118
 119     // insert a break in the menu (only works when appending the items, not
 120     // inserting them)
 121     virtual void Break() { }
 122
 123     // insert an item before given position
 124     bool Insert(size_t pos, wxMenuItem *item);
 125
 126     // insert an item before given position
 127     void Insert(size_t pos,
 128                 int id,
 129                 const wxString& text,
 130                 const wxString& help = wxEmptyString,
 131                 wxItemKind kind = wxItem_Normal)
 132     {
 133         Insert(pos, wxMenuItem::New((wxMenu *)this, id, text, help, kind));
 134     }
 135
 136     // insert a separator
 137     void InsertSeparator(size_t pos)
 138     {
 139         Insert(pos, wxMenuItem::New((wxMenu *)this));
 140     }
 141
 142     // insert a check item
 143     void InsertCheckItem(size_t pos,
 144                          int id,
 145                          const wxString& text,
 146                          const wxString& help = wxEmptyString)
 147     {
 148         Insert(pos, id, text, help, wxItem_Check);
 149     }
 150
 151     // insert a radio item
 152     void InsertRadioItem(size_t pos,
 153                          int id,
 154                          const wxString& text,
 155                          const wxString& help = wxEmptyString)
 156     {
 157         Insert(pos, id, text, help, wxItem_Radio);
 158     }
 159
 160     // insert a submenu
 161     void Insert(size_t pos,
 162                 int id,
 163                 const wxString& text,
 164                 wxMenu *submenu,
 165                 const wxString& help = wxEmptyString)
 166     {
 167         Insert(pos, wxMenuItem::New((wxMenu *)this, id, text, help,
 168                                     wxItem_Normal, submenu));
 169     }
 170
 171     // prepend an item to the menu
 172     void Prepend(wxMenuItem *item)
 173     {
 174         Insert(0u, item);
 175     }
 176
 177     // prepend any item to the menu
 178     void Prepend(int id,
 179                  const wxString& text,
 180                  const wxString& help = wxEmptyString,
 181                  wxItemKind kind = wxItem_Normal)
 182     {
 183         Insert(0u, id, text, help, kind);
 184     }
 185
 186     // prepend a separator
 187     void PrependSeparator()
 188     {
 189         InsertSeparator(0u);
 190     }
 191
 192     // prepend a check item
 193     void PrependCheckItem(int id,
 194                           const wxString& text,
 195                           const wxString& help = wxEmptyString)
 196     {
 197         InsertCheckItem(0u, id, text, help);
 198     }
 199
 200     // prepend a radio item
 201     void PrependRadioItem(int id,
 202                           const wxString& text,
 203                           const wxString& help = wxEmptyString)
 204     {
 205         InsertRadioItem(0u, id, text, help);
 206     }
 207
 208     // prepend a submenu
 209     void Prepend(int id,
 210                  const wxString& text,
 211                  wxMenu *submenu,
 212                  const wxString& help = wxEmptyString)
 213     {
 214         Insert(0u, id, text, submenu, help);
 215     }
 216
 217     // detach an item from the menu, but don't delete it so that it can be
 218     // added back later (but if it's not, the caller is responsible for
 219     // deleting it!)
 220     wxMenuItem *Remove(int id) { return Remove(FindChildItem(id)); }
 221     wxMenuItem *Remove(wxMenuItem *item);
 222
 223     // delete an item from the menu (submenus are not destroyed by this
 224     // function, see Destroy)
 225     bool Delete(int id) { return Delete(FindChildItem(id)); }
 226     bool Delete(wxMenuItem *item);
 227
 228     // delete the item from menu and destroy it (if it's a submenu)
 229     bool Destroy(int id) { return Destroy(FindChildItem(id)); }
 230     bool Destroy(wxMenuItem *item);
 231
 232     // menu items access
 233     // -----------------
 234
 235     // get the items
 236     size_t GetMenuItemCount() const { return m_items.GetCount(); }
 237
 238     const wxMenuItemList& GetMenuItems() const { return m_items; }
 239     wxMenuItemList& GetMenuItems() { return m_items; }
 240
 241     // search
 242     virtual int FindItem(const wxString& item) const;
 243     wxMenuItem* FindItem(int id, wxMenu **menu = NULL) const;
 244
 245     // get/set items attributes
 246     void Enable(int id, bool enable);
 247     bool IsEnabled(int id) const;
 248
 249     void Check(int id, bool check);
 250     bool IsChecked(int id) const;
 251
 252     void SetLabel(int id, const wxString& label);
 253     wxString GetLabel(int id) const;
 254
 255     virtual void SetHelpString(int id, const wxString& helpString);
 256     virtual wxString GetHelpString(int id) const;
 257
 258     // misc accessors
 259     // --------------
 260
 261     // the title
 262     virtual void SetTitle(const wxString& title) { m_title = title; }
 263     const wxString GetTitle() const { return m_title; }
 264
 265     // event handler
 266     void SetEventHandler(wxEvtHandler *handler) { m_eventHandler = handler; }
 267     wxEvtHandler *GetEventHandler() const { return m_eventHandler; }
 268
 269     // invoking window
 270     void SetInvokingWindow(wxWindow *win) { m_invokingWindow = win; }
 271     wxWindow *GetInvokingWindow() const { return m_invokingWindow; }
 272
 273     // style
 274     long GetStyle() const { return m_style; }
 275
 276     // implementation helpers
 277     // ----------------------
 278
 279     // Updates the UI for a menu and all submenus recursively. source is the
 280     // object that has the update event handlers defined for it. If NULL, the
 281     // menu or associated window will be used.
 282     void UpdateUI(wxEvtHandler* source = (wxEvtHandler*)NULL);
 283
 284     // get the menu bar this menu is attached to (may be NULL, always NULL for
 285     // popup menus)
 286     wxMenuBar *GetMenuBar() const { return m_menuBar; }
 287
 288     // called when the menu is attached/detached to/from a menu bar
 289     virtual void Attach(wxMenuBarBase *menubar);
 290     virtual void Detach();
 291
 292     // is the menu attached to a menu bar (or is it a popup one)?
 293     bool IsAttached() const { return m_menuBar != NULL; }
 294
 295     // set/get the parent of this menu
 296     void SetParent(wxMenu *parent) { m_menuParent = parent; }
 297     wxMenu *GetParent() const { return m_menuParent; }
 298
 299     // implementation only from now on
 300     // -------------------------------
 301
 302     // unlike FindItem(), this function doesn't recurse but only looks through
 303     // our direct children and also may return the index of the found child if
 304     // pos != NULL
 305     wxMenuItem *FindChildItem(int id, size_t *pos = NULL) const;
 306
 307     // called to generate a wxCommandEvent, return TRUE if it was processed,
 308     // FALSE otherwise
 309     //
 310     // the checked parameter may have boolean value or -1 for uncheckable items
 311     bool SendEvent(int id, int checked = -1);
 312
 313     // compatibility: these functions are deprecated, use the new ones instead
 314     // -----------------------------------------------------------------------
 315
 316     // use the versions taking wxItem_XXX now instead, they're more readable
 317     // and allow adding the radio items as well
 318     void Append(int id,
 319                 const wxString& text,
 320                 const wxString& help,
 321                 bool isCheckable)
 322     {
 323         Append(id, text, help, isCheckable ? wxItem_Check : wxItem_Normal);
 324     }
 325
 326     void Insert(size_t pos,
 327                 int id,
 328                 const wxString& text,
 329                 const wxString& help,
 330                 bool isCheckable)
 331     {
 332         Insert(pos, id, text, help, isCheckable ? wxItem_Check : wxItem_Normal);
 333     }
 334
 335     void Prepend(int id,
 336                  const wxString& text,
 337                  const wxString& help,
 338                  bool isCheckable)
 339     {
 340         Insert(0u, id, text, help, isCheckable);
 341     }
 342
 343 #if WXWIN_COMPATIBILITY
 344     bool Enabled(int id) const { return IsEnabled(id); }
 345     bool Checked(int id) const { return IsChecked(id); }
 346
 347     wxMenuItem* FindItemForId(int itemId, wxMenu **itemMenu) const
 348         { return FindItem(itemId, itemMenu); }
 349
 350     wxList& GetItems() const { return (wxList &)m_items; }
 351 #endif // WXWIN_COMPATIBILITY
 352
 353 #if wxUSE_MENU_CALLBACK || defined(__WXMOTIF__)
 354     // wxWin 1.6x compatible menu event handling
 355     wxFunction GetCallback() const { return m_callback; }
 356     void Callback(const wxFunction func) { m_callback = func; }
 357
 358     wxFunction m_callback;
 359 #endif // wxUSE_MENU_CALLBACK
 360
 361 protected:
 362     // virtuals to override in derived classes
 363     // ---------------------------------------
 364
 365     virtual bool DoAppend(wxMenuItem *item);
 366     virtual bool DoInsert(size_t pos, wxMenuItem *item);
 367
 368     virtual wxMenuItem *DoRemove(wxMenuItem *item);
 369     virtual bool DoDelete(wxMenuItem *item);
 370     virtual bool DoDestroy(wxMenuItem *item);
 371
 372     // helpers
 373     // -------
 374
 375     // common part of all ctors
 376     void Init(long style);
 377
 378     // associate the submenu with this menu
 379     void AddSubMenu(wxMenu *submenu);
 380
 381     wxMenuBar     *m_menuBar;           // menubar we belong to or NULL
 382     wxMenu        *m_menuParent;        // parent menu or NULL
 383
 384     wxString       m_title;             // the menu title or label
 385     wxMenuItemList m_items;             // the list of menu items
 386
 387     wxWindow      *m_invokingWindow;    // for popup menus
 388
 389     long           m_style;             // combination of wxMENU_XXX flags
 390
 391     wxEvtHandler  *m_eventHandler;      // a pluggable in event handler
 392 };
 393
 394 // ----------------------------------------------------------------------------
 395 // wxMenuBar
 396 // ----------------------------------------------------------------------------
 397
 398 class WXDLLEXPORT wxMenuBarBase : public wxWindow
 399 {
 400 public:
 401     // default ctor
 402     wxMenuBarBase();
 403
 404     // dtor will delete all menus we own
 405     virtual ~wxMenuBarBase();
 406
 407     // menu bar construction
 408     // ---------------------
 409
 410     // append a menu to the end of menubar, return TRUE if ok
 411     virtual bool Append(wxMenu *menu, const wxString& title);
 412
 413     // insert a menu before the given position into the menubar, return TRUE
 414     // if inserted ok
 415     virtual bool Insert(size_t pos, wxMenu *menu, const wxString& title);
 416
 417     // menu bar items access
 418     // ---------------------
 419
 420     // get the number of menus in the menu bar
 421     size_t GetMenuCount() const { return m_menus.GetCount(); }
 422
 423     // get the menu at given position
 424     wxMenu *GetMenu(size_t pos) const;
 425
 426     // replace the menu at given position with another one, returns the
 427     // previous menu (which should be deleted by the caller)
 428     virtual wxMenu *Replace(size_t pos, wxMenu *menu, const wxString& title);
 429
 430     // delete the menu at given position from the menu bar, return the pointer
 431     // to the menu (which should be  deleted by the caller)
 432     virtual wxMenu *Remove(size_t pos);
 433
 434     // enable or disable a submenu
 435     virtual void EnableTop(size_t pos, bool enable) = 0;
 436
 437     // is the menu enabled?
 438     virtual bool IsEnabledTop(size_t WXUNUSED(pos)) const { return TRUE; }
 439
 440     // get or change the label of the menu at given position
 441     virtual void SetLabelTop(size_t pos, const wxString& label) = 0;
 442     virtual wxString GetLabelTop(size_t pos) const = 0;
 443
 444     // item search
 445     // -----------
 446
 447     // by menu and item names, returns wxNOT_FOUND if not found or id of the
 448     // found item
 449     virtual int FindMenuItem(const wxString& menu, const wxString& item) const;
 450
 451     // find item by id (in any menu), returns NULL if not found
 452     //
 453     // if menu is !NULL, it will be filled with wxMenu this item belongs to
 454     virtual wxMenuItem* FindItem(int id, wxMenu **menu = NULL) const;
 455
 456     // find menu by its caption, return wxNOT_FOUND on failure
 457     int FindMenu(const wxString& title) const;
 458
 459     // item access
 460     // -----------
 461
 462     // all these functions just use FindItem() and then call an appropriate
 463     // method on it
 464     //
 465     // NB: under MSW, these methods can only be used after the menubar had
 466     //     been attached to the frame
 467
 468     void Enable(int id, bool enable);
 469     void Check(int id, bool check);
 470     bool IsChecked(int id) const;
 471     bool IsEnabled(int id) const;
 472
 473     void SetLabel(int id, const wxString &label);
 474     wxString GetLabel(int id) const;
 475
 476     void SetHelpString(int id, const wxString& helpString);
 477     wxString GetHelpString(int id) const;
 478
 479     // implementation helpers
 480
 481     // get the frame we are attached to (may return NULL)
 482     wxFrame *GetFrame() const { return m_menuBarFrame; }
 483
 484     // returns TRUE if we're attached to a frame
 485     bool IsAttached() const { return GetFrame() != NULL; }
 486
 487     // associate the menubar with the frame
 488     virtual void Attach(wxFrame *frame);
 489
 490     // called before deleting the menubar normally
 491     virtual void Detach();
 492
 493     // need to override these ones to avoid virtual function hiding
 494     virtual bool Enable(bool enable = TRUE) { return wxWindow::Enable(enable); }
 495     virtual void SetLabel(const wxString& s) { wxWindow::SetLabel(s); }
 496     virtual wxString GetLabel() const { return wxWindow::GetLabel(); }
 497
 498     // don't want menu bars to accept the focus by tabbing to them
 499     virtual bool AcceptsFocusFromKeyboard() const { return FALSE; }
 500
 501     // compatibility only: these functions are deprecated, use the new ones
 502     // instead
 503 #if WXWIN_COMPATIBILITY
 504     bool Enabled(int id) const { return IsEnabled(id); }
 505     bool Checked(int id) const { return IsChecked(id); }
 506
 507     wxMenuItem* FindMenuItemById(int id) const
 508         { return FindItem(id); }
 509     wxMenuItem* FindItemForId(int id, wxMenu **menu = NULL) const
 510         { return FindItem(id, menu); }
 511 #endif // WXWIN_COMPATIBILITY
 512
 513 protected:
 514     // the list of all our menus
 515     wxMenuList m_menus;
 516
 517     // the frame we are attached to (may be NULL)
 518     wxFrame *m_menuBarFrame;
 519 };
 520
 521 // ----------------------------------------------------------------------------
 522 // include the real class declaration
 523 // ----------------------------------------------------------------------------
 524
 525 #ifdef wxUSE_BASE_CLASSES_ONLY
 526     #define wxMenuItem wxMenuItemBase
 527 #else // !wxUSE_BASE_CLASSES_ONLY
 528 #if defined(__WXUNIVERSAL__)
 529     #include "wx/univ/menu.h"
 530 #elif defined(__WXMSW__)
 531     #include "wx/msw/menu.h"
 532 #elif defined(__WXMOTIF__)
 533     #include "wx/motif/menu.h"
 534 #elif defined(__WXGTK__)
 535     #include "wx/gtk/menu.h"
 536 #elif defined(__WXMAC__)
 537     #include "wx/mac/menu.h"
 538 #elif defined(__WXPM__)
 539     #include "wx/os2/menu.h"
 540 #elif defined(__WXSTUBS__)
 541     #include "wx/stubs/menu.h"
 542 #endif
 543 #endif // wxUSE_BASE_CLASSES_ONLY/!wxUSE_BASE_CLASSES_ONLY
 544
 545 #endif // wxUSE_MENUS
 546
 547 #endif
 548     // _WX_MENU_H_BASE_