src/common/menucmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/menucmn.cpp
   3 // Purpose:     wxMenu and wxMenuBar methods common to all ports
   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 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "menubase.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #include <ctype.h>
  28
  29 #ifdef __BORLANDC__
  30     #pragma hdrstop
  31 #endif
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/menu.h"
  35 #endif
  36
  37 // ----------------------------------------------------------------------------
  38 // template lists
  39 // ----------------------------------------------------------------------------
  40
  41 #include "wx/listimpl.cpp"
  42
  43 WX_DEFINE_LIST(wxMenuList);
  44 WX_DEFINE_LIST(wxMenuItemList);
  45
  46 // ============================================================================
  47 // implementation
  48 // ============================================================================
  49
  50 // ----------------------------------------------------------------------------
  51 // wxMenuItem
  52 // ----------------------------------------------------------------------------
  53
  54 wxMenuItemBase::~wxMenuItemBase()
  55 {
  56     if (m_subMenu)
  57         delete m_subMenu;
  58 }
  59
  60 #if wxUSE_ACCEL
  61
  62 void wxMenuItemBase::SetAccel(wxAcceleratorEntry *accel)
  63 {
  64     wxString text = m_text.BeforeFirst(wxT('\t'));
  65     if ( accel )
  66     {
  67         text += wxT('\t');
  68
  69         int flags = accel->GetFlags();
  70         if ( flags & wxACCEL_ALT )
  71             text += wxT("Alt-");
  72         if ( flags & wxACCEL_CTRL )
  73             text += wxT("Ctrl-");
  74         if ( flags & wxACCEL_SHIFT )
  75             text += wxT("Shift-");
  76
  77         int code = accel->GetKeyCode();
  78         switch ( code )
  79         {
  80             case WXK_F1:
  81             case WXK_F2:
  82             case WXK_F3:
  83             case WXK_F4:
  84             case WXK_F5:
  85             case WXK_F6:
  86             case WXK_F7:
  87             case WXK_F8:
  88             case WXK_F9:
  89             case WXK_F10:
  90             case WXK_F11:
  91             case WXK_F12:
  92                 text << wxT('F') << code - WXK_F1 + 1;
  93                 break;
  94
  95             // if there are any other keys wxGetAccelFromString() may return,
  96             // we should process them here
  97
  98             default:
  99                 if ( wxIsalnum(code) )
 100                 {
 101                     text << (wxChar)code;
 102
 103                     break;
 104                 }
 105
 106                 wxFAIL_MSG( wxT("unknown keyboard accel") );
 107         }
 108     }
 109
 110     SetText(text);
 111 }
 112
 113 #endif // wxUSE_ACCEL
 114
 115 // ----------------------------------------------------------------------------
 116 // wxMenu ctor and dtor
 117 // ----------------------------------------------------------------------------
 118
 119 void wxMenuBase::Init(long style)
 120 {
 121     m_items.DeleteContents(TRUE);
 122
 123     m_menuBar = (wxMenuBar *)NULL;
 124     m_menuParent = (wxMenu *)NULL;
 125
 126     m_invokingWindow = (wxWindow *)NULL;
 127     m_style = style;
 128     m_clientData = (void *)NULL;
 129     m_eventHandler = this;
 130
 131 #if wxUSE_MENU_CALLBACK
 132     m_callback = (wxFunction) NULL;
 133 #endif // wxUSE_MENU_CALLBACK
 134 }
 135
 136 wxMenuBase::~wxMenuBase()
 137 {
 138     // nothing to do, wxMenuItemList dtor will delete the menu items.
 139        // Actually, in GTK, the submenus have to get deleted first.
 140 }
 141
 142 // ----------------------------------------------------------------------------
 143 // wxMenu item adding/removing
 144 // ----------------------------------------------------------------------------
 145
 146 bool wxMenuBase::DoAppend(wxMenuItem *item)
 147 {
 148     wxCHECK_MSG( item, FALSE, wxT("invalid item in wxMenu::Append()") );
 149
 150     m_items.Append(item);
 151
 152     return TRUE;
 153 }
 154
 155 bool wxMenuBase::Insert(size_t pos, wxMenuItem *item)
 156 {
 157     wxCHECK_MSG( item, FALSE, wxT("invalid item in wxMenu::Insert") );
 158
 159     if ( pos == GetMenuItemCount() )
 160     {
 161         return DoAppend(item);
 162     }
 163     else
 164     {
 165         wxCHECK_MSG( pos < GetMenuItemCount(), FALSE,
 166                      wxT("invalid index in wxMenu::Insert") );
 167
 168         return DoInsert(pos, item);
 169     }
 170 }
 171
 172 bool wxMenuBase::DoInsert(size_t pos, wxMenuItem *item)
 173 {
 174     wxCHECK_MSG( item, FALSE, wxT("invalid item in wxMenu::Insert()") );
 175
 176     wxMenuItemList::Node *node = m_items.Item(pos);
 177     wxCHECK_MSG( node, FALSE, wxT("invalid index in wxMenu::Insert()") );
 178
 179     m_items.Insert(node, item);
 180
 181     return TRUE;
 182 }
 183
 184 wxMenuItem *wxMenuBase::Remove(wxMenuItem *item)
 185 {
 186     wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Remove") );
 187
 188     return DoRemove(item);
 189 }
 190
 191 wxMenuItem *wxMenuBase::DoRemove(wxMenuItem *item)
 192 {
 193     wxMenuItemList::Node *node = m_items.Find(item);
 194
 195     // if we get here, the item is valid or one of Remove() functions is broken
 196     wxCHECK_MSG( node, NULL, wxT("bug in wxMenu::Remove logic") );
 197
 198     // we detach the item, but we do delete the list node (i.e. don't call
 199     // DetachNode() here!)
 200     node->SetData((wxMenuItem *)NULL);  // to prevent it from deleting the item
 201     m_items.DeleteNode(node);
 202
 203     // item isn't attached to anything any more
 204     wxMenu *submenu = item->GetSubMenu();
 205     if ( submenu )
 206     {
 207         submenu->SetParent((wxMenu *)NULL);
 208     }
 209
 210     return item;
 211 }
 212
 213 bool wxMenuBase::Delete(wxMenuItem *item)
 214 {
 215     wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Delete") );
 216
 217     return DoDelete(item);
 218 }
 219
 220 bool wxMenuBase::DoDelete(wxMenuItem *item)
 221 {
 222     wxMenuItem *item2 = DoRemove(item);
 223     wxCHECK_MSG( item2, FALSE, wxT("failed to delete menu item") );
 224
 225     // don't delete the submenu
 226     item2->SetSubMenu((wxMenu *)NULL);
 227
 228     delete item2;
 229
 230     return TRUE;
 231 }
 232
 233 bool wxMenuBase::Destroy(wxMenuItem *item)
 234 {
 235     wxCHECK_MSG( item, NULL, wxT("invalid item in wxMenu::Destroy") );
 236
 237     return DoDestroy(item);
 238 }
 239
 240 bool wxMenuBase::DoDestroy(wxMenuItem *item)
 241 {
 242     wxMenuItem *item2 = DoRemove(item);
 243     wxCHECK_MSG( item2, FALSE, wxT("failed to delete menu item") );
 244
 245     delete item2;
 246
 247     return TRUE;
 248 }
 249
 250 // ----------------------------------------------------------------------------
 251 // wxMenu searching for items
 252 // ----------------------------------------------------------------------------
 253
 254 // Finds the item id matching the given string, -1 if not found.
 255 int wxMenuBase::FindItem(const wxString& text) const
 256 {
 257     wxString label = wxMenuItem::GetLabelFromText(text);
 258     for ( wxMenuItemList::Node *node = m_items.GetFirst();
 259           node;
 260           node = node->GetNext() )
 261     {
 262         wxMenuItem *item = node->GetData();
 263         if ( item->IsSubMenu() )
 264         {
 265             int rc = item->GetSubMenu()->FindItem(label);
 266             if ( rc != wxNOT_FOUND )
 267                 return rc;
 268         }
 269         else if ( !item->IsSeparator() )
 270         {
 271             if ( item->GetLabel() == label )
 272                 return item->GetId();
 273         }
 274     }
 275
 276     return wxNOT_FOUND;
 277 }
 278
 279 // recursive search for item by id
 280 wxMenuItem *wxMenuBase::FindItem(int itemId, wxMenu **itemMenu) const
 281 {
 282     if ( itemMenu )
 283         *itemMenu = NULL;
 284
 285     wxMenuItem *item = NULL;
 286     for ( wxMenuItemList::Node *node = m_items.GetFirst();
 287           node && !item;
 288           node = node->GetNext() )
 289     {
 290         item = node->GetData();
 291
 292         if ( item->GetId() == itemId )
 293         {
 294             if ( itemMenu )
 295                 *itemMenu = (wxMenu *)this;
 296         }
 297         else if ( item->IsSubMenu() )
 298         {
 299             item = item->GetSubMenu()->FindItem(itemId, itemMenu);
 300         }
 301         else
 302         {
 303             // don't exit the loop
 304             item = NULL;
 305         }
 306     }
 307
 308     return item;
 309 }
 310
 311 // non recursive search
 312 wxMenuItem *wxMenuBase::FindChildItem(int id, size_t *ppos) const
 313 {
 314     wxMenuItem *item = (wxMenuItem *)NULL;
 315     wxMenuItemList::Node *node = GetMenuItems().GetFirst();
 316
 317     size_t pos;
 318     for ( pos = 0; node; pos++ )
 319     {
 320         if ( node->GetData()->GetId() == id )
 321         {
 322             item = node->GetData();
 323
 324             break;
 325         }
 326
 327         node = node->GetNext();
 328     }
 329
 330     if ( ppos )
 331     {
 332         *ppos = item ? pos : (size_t)wxNOT_FOUND;
 333     }
 334
 335     return item;
 336 }
 337
 338 // ----------------------------------------------------------------------------
 339 // wxMenu helpers
 340 // ----------------------------------------------------------------------------
 341
 342 // Update a menu and all submenus recursively. source is the object that has
 343 // the update event handlers defined for it. If NULL, the menu or associated
 344 // window will be used.
 345 void wxMenuBase::UpdateUI(wxEvtHandler* source)
 346 {
 347     if ( !source && GetInvokingWindow() )
 348         source = GetInvokingWindow()->GetEventHandler();
 349     if ( !source )
 350         source = GetEventHandler();
 351     if ( !source )
 352         source = this;
 353
 354     wxMenuItemList::Node* node = GetMenuItems().GetFirst();
 355     while ( node )
 356     {
 357         wxMenuItem* item = node->GetData();
 358         if ( !item->IsSeparator() )
 359         {
 360             wxWindowID id = item->GetId();
 361             wxUpdateUIEvent event(id);
 362             event.SetEventObject( source );
 363
 364             if ( source->ProcessEvent(event) )
 365             {
 366                 // if anything changed, update the chanegd attribute
 367                 if (event.GetSetText())
 368                     SetLabel(id, event.GetText());
 369                 if (event.GetSetChecked())
 370                     Check(id, event.GetChecked());
 371                 if (event.GetSetEnabled())
 372                     Enable(id, event.GetEnabled());
 373             }
 374
 375             // recurse to the submenus
 376             if ( item->GetSubMenu() )
 377                 item->GetSubMenu()->UpdateUI(source);
 378         }
 379         //else: item is a separator (which don't process update UI events)
 380
 381         node = node->GetNext();
 382     }
 383 }
 384
 385 // ----------------------------------------------------------------------------
 386 // wxMenu functions forwarded to wxMenuItem
 387 // ----------------------------------------------------------------------------
 388
 389 void wxMenuBase::Enable( int id, bool enable )
 390 {
 391     wxMenuItem *item = FindItem(id);
 392
 393     wxCHECK_RET( item, wxT("wxMenu::Enable: no such item") );
 394
 395     item->Enable(enable);
 396 }
 397
 398 bool wxMenuBase::IsEnabled( int id ) const
 399 {
 400     wxMenuItem *item = FindItem(id);
 401
 402     wxCHECK_MSG( item, FALSE, wxT("wxMenu::IsEnabled: no such item") );
 403
 404     return item->IsEnabled();
 405 }
 406
 407 void wxMenuBase::Check( int id, bool enable )
 408 {
 409     wxMenuItem *item = FindItem(id);
 410
 411     wxCHECK_RET( item, wxT("wxMenu::Check: no such item") );
 412
 413     item->Check(enable);
 414 }
 415
 416 bool wxMenuBase::IsChecked( int id ) const
 417 {
 418     wxMenuItem *item = FindItem(id);
 419
 420     wxCHECK_MSG( item, FALSE, wxT("wxMenu::IsChecked: no such item") );
 421
 422     return item->IsChecked();
 423 }
 424
 425 void wxMenuBase::SetLabel( int id, const wxString &label )
 426 {
 427     wxMenuItem *item = FindItem(id);
 428
 429     wxCHECK_RET( item, wxT("wxMenu::SetLabel: no such item") );
 430
 431     item->SetText(label);
 432 }
 433
 434 wxString wxMenuBase::GetLabel( int id ) const
 435 {
 436     wxMenuItem *item = FindItem(id);
 437
 438     wxCHECK_MSG( item, wxT(""), wxT("wxMenu::GetLabel: no such item") );
 439
 440     return item->GetText();
 441 }
 442
 443 void wxMenuBase::SetHelpString( int id, const wxString& helpString )
 444 {
 445     wxMenuItem *item = FindItem(id);
 446
 447     wxCHECK_RET( item, wxT("wxMenu::SetHelpString: no such item") );
 448
 449     item->SetHelp( helpString );
 450 }
 451
 452 wxString wxMenuBase::GetHelpString( int id ) const
 453 {
 454     wxMenuItem *item = FindItem(id);
 455
 456     wxCHECK_MSG( item, wxT(""), wxT("wxMenu::GetHelpString: no such item") );
 457
 458     return item->GetHelp();
 459 }
 460
 461 // ----------------------------------------------------------------------------
 462 // wxMenuBarBase ctor and dtor
 463 // ----------------------------------------------------------------------------
 464
 465 wxMenuBarBase::wxMenuBarBase()
 466 {
 467     // we own the menus when we get them
 468     m_menus.DeleteContents(TRUE);
 469 }
 470
 471 wxMenuBarBase::~wxMenuBarBase()
 472 {
 473     // nothing to do, the list will delete the menus because of the call to
 474     // DeleteContents() above
 475 }
 476
 477 // ----------------------------------------------------------------------------
 478 // wxMenuBar item access: the base class versions manage m_menus list, the
 479 // derived class should reflect the changes in the real menubar
 480 // ----------------------------------------------------------------------------
 481
 482 wxMenu *wxMenuBarBase::GetMenu(size_t pos) const
 483 {
 484     wxMenuList::Node *node = m_menus.Item(pos);
 485     wxCHECK_MSG( node, NULL, wxT("bad index in wxMenuBar::GetMenu()") );
 486
 487     return node->GetData();
 488 }
 489
 490 bool wxMenuBarBase::Append(wxMenu *menu, const wxString& WXUNUSED(title))
 491 {
 492     wxCHECK_MSG( menu, FALSE, wxT("can't append NULL menu") );
 493
 494     m_menus.Append(menu);
 495
 496     return TRUE;
 497 }
 498
 499 bool wxMenuBarBase::Insert(size_t pos, wxMenu *menu,
 500                            const wxString& title)
 501 {
 502     if ( pos == m_menus.GetCount() )
 503     {
 504         return Append(menu, title);
 505     }
 506     else
 507     {
 508         wxCHECK_MSG( menu, FALSE, wxT("can't insert NULL menu") );
 509
 510         wxMenuList::Node *node = m_menus.Item(pos);
 511         wxCHECK_MSG( node, FALSE, wxT("bad index in wxMenuBar::Insert()") );
 512
 513         m_menus.Insert(node, menu);
 514
 515         return TRUE;
 516     }
 517 }
 518
 519 wxMenu *wxMenuBarBase::Replace(size_t pos, wxMenu *menu,
 520                                const wxString& WXUNUSED(title))
 521 {
 522     wxCHECK_MSG( menu, NULL, wxT("can't insert NULL menu") );
 523
 524     wxMenuList::Node *node = m_menus.Item(pos);
 525     wxCHECK_MSG( node, NULL, wxT("bad index in wxMenuBar::Replace()") );
 526
 527     wxMenu *menuOld = node->GetData();
 528     node->SetData(menu);
 529
 530     return menuOld;
 531 }
 532
 533 wxMenu *wxMenuBarBase::Remove(size_t pos)
 534 {
 535     wxMenuList::Node *node = m_menus.Item(pos);
 536     wxCHECK_MSG( node, NULL, wxT("bad index in wxMenuBar::Remove()") );
 537
 538     node = m_menus.DetachNode(node);
 539     wxCHECK( node, NULL );  // unexpected
 540     wxMenu *menu = node->GetData();
 541
 542     delete node;
 543
 544     return menu;
 545 }
 546
 547 // ---------------------------------------------------------------------------
 548 // wxMenuBar functions forwarded to wxMenuItem
 549 // ---------------------------------------------------------------------------
 550
 551 void wxMenuBarBase::Enable(int id, bool enable)
 552 {
 553     wxMenuItem *item = FindItem(id);
 554
 555     wxCHECK_RET( item, wxT("attempt to enable an item which doesn't exist") );
 556
 557     item->Enable(enable);
 558 }
 559
 560 void wxMenuBarBase::Check(int id, bool check)
 561 {
 562     wxMenuItem *item = FindItem(id);
 563
 564     wxCHECK_RET( item, wxT("attempt to check an item which doesn't exist") );
 565     wxCHECK_RET( item->IsCheckable(), wxT("attempt to check an uncheckable item") );
 566
 567     item->Check(check);
 568 }
 569
 570 bool wxMenuBarBase::IsChecked(int id) const
 571 {
 572     wxMenuItem *item = FindItem(id);
 573
 574     wxCHECK_MSG( item, FALSE, wxT("wxMenuBar::IsChecked(): no such item") );
 575
 576     return item->IsChecked();
 577 }
 578
 579 bool wxMenuBarBase::IsEnabled(int id) const
 580 {
 581     wxMenuItem *item = FindItem(id);
 582
 583     wxCHECK_MSG( item, FALSE, wxT("wxMenuBar::IsEnabled(): no such item") );
 584
 585     return item->IsEnabled();
 586 }
 587
 588 void wxMenuBarBase::SetLabel(int id, const wxString& label)
 589 {
 590     wxMenuItem *item = FindItem(id);
 591
 592     wxCHECK_RET( item, wxT("wxMenuBar::SetLabel(): no such item") );
 593
 594     item->SetText(label);
 595 }
 596
 597 wxString wxMenuBarBase::GetLabel(int id) const
 598 {
 599     wxMenuItem *item = FindItem(id);
 600
 601     wxCHECK_MSG( item, wxEmptyString,
 602                  wxT("wxMenuBar::GetLabel(): no such item") );
 603
 604     return item->GetText();
 605 }
 606
 607 void wxMenuBarBase::SetHelpString(int id, const wxString& helpString)
 608 {
 609     wxMenuItem *item = FindItem(id);
 610
 611     wxCHECK_RET( item, wxT("wxMenuBar::SetHelpString(): no such item") );
 612
 613     item->SetHelp(helpString);
 614 }
 615
 616 wxString wxMenuBarBase::GetHelpString(int id) const
 617 {
 618     wxMenuItem *item = FindItem(id);
 619
 620     wxCHECK_MSG( item, wxEmptyString,
 621                  wxT("wxMenuBar::GetHelpString(): no such item") );
 622
 623     return item->GetHelp();
 624 }
 625