src/gtk/menu.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        menu.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "menu.h"
  12 #pragma implementation "menuitem.h"
  13 #endif
  14
  15 #include "wx/menu.h"
  16 #include "wx/log.h"
  17 #include "wx/intl.h"
  18 #include "wx/app.h"
  19
  20 #include "gdk/gdk.h"
  21 #include "gtk/gtk.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // wxMenuBar
  25 //-----------------------------------------------------------------------------
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxMenuBar,wxWindow)
  28
  29 wxMenuBar::wxMenuBar( long style )
  30 {
  31     m_needParent = FALSE; // hmmm
  32
  33     PreCreation( (wxWindow *) NULL, -1, wxDefaultPosition, wxDefaultSize, 0, "menu" );
  34
  35     m_menus.DeleteContents( TRUE );
  36
  37     m_menubar = gtk_menu_bar_new();
  38
  39     if (style & wxMB_DOCKABLE)
  40     {
  41         m_widget = gtk_handle_box_new();
  42         gtk_container_add( GTK_CONTAINER(m_widget), GTK_WIDGET(m_menubar) );
  43         gtk_widget_show( GTK_WIDGET(m_menubar) );
  44     }
  45     else
  46     {
  47         m_widget = GTK_WIDGET(m_menubar);
  48     }
  49
  50     PostCreation();
  51
  52     Show( TRUE );
  53 }
  54
  55 wxMenuBar::wxMenuBar()
  56 {
  57     m_needParent = FALSE; // hmmm
  58
  59     PreCreation( (wxWindow *) NULL, -1, wxDefaultPosition, wxDefaultSize, 0, "menu" );
  60
  61     m_menus.DeleteContents( TRUE );
  62
  63     m_menubar = gtk_menu_bar_new();
  64
  65     m_widget = GTK_WIDGET(m_menubar);
  66
  67     PostCreation();
  68
  69     Show( TRUE );
  70 }
  71
  72 void wxMenuBar::Append( wxMenu *menu, const wxString &title )
  73 {
  74     m_menus.Append( menu );
  75
  76     wxString s = "";
  77     for ( const char *pc = title; *pc != '\0'; pc++ )
  78     {
  79         if (*pc == '&')
  80         {
  81             pc++; /* skip it */
  82 #if (GTK_MINOR_VERSION > 0)
  83     //      s << '_';  not yet
  84 #endif
  85         }
  86         s << *pc;
  87     }
  88
  89     menu->SetTitle(s);
  90     menu->m_owner = gtk_menu_item_new_with_label( WXSTRINGCAST(s) );
  91     gtk_widget_show( menu->m_owner );
  92     gtk_menu_item_set_submenu( GTK_MENU_ITEM(menu->m_owner), menu->m_menu );
  93
  94     gtk_menu_bar_append( GTK_MENU_BAR(m_menubar), menu->m_owner );
  95 }
  96
  97 static int FindMenuItemRecursive( const wxMenu *menu, const wxString &menuString, const wxString &itemString )
  98 {
  99     if (menu->GetTitle() == menuString)
 100     {
 101         int res = menu->FindItem( itemString );
 102         if (res != wxNOT_FOUND)
 103             return res;
 104     }
 105
 106     wxNode *node = ((wxMenu *)menu)->GetItems().First();    // const_cast
 107     while (node)
 108     {
 109         wxMenuItem *item = (wxMenuItem*)node->Data();
 110         if (item->IsSubMenu())
 111             return FindMenuItemRecursive(item->GetSubMenu(), menuString, itemString);
 112
 113         node = node->Next();
 114     }
 115
 116     return wxNOT_FOUND;
 117 }
 118
 119 wxMenuItem *wxMenuBar::FindItemForId(int itemId, wxMenu **menuForItem = NULL) const
 120 {
 121     if ( menuForItem )
 122     {
 123         // TODO return the pointer to the menu
 124
 125         *menuForItem = NULL;
 126     }
 127
 128     return FindItem(itemId);
 129 }
 130
 131 int wxMenuBar::FindMenuItem( const wxString &menuString, const wxString &itemString ) const
 132 {
 133     wxNode *node = m_menus.First();
 134     while (node)
 135     {
 136         wxMenu *menu = (wxMenu*)node->Data();
 137         int res = FindMenuItemRecursive( menu, menuString, itemString);
 138         if (res != -1) return res;
 139         node = node->Next();
 140     }
 141     return -1;
 142 }
 143
 144 // Find a wxMenuItem using its id. Recurses down into sub-menus
 145 static wxMenuItem* FindMenuItemByIdRecursive(const wxMenu* menu, int id)
 146 {
 147     wxMenuItem* result = menu->FindItem(id);
 148
 149     wxNode *node = ((wxMenu *)menu)->GetItems().First(); // const_cast
 150     while ( node && result == NULL )
 151     {
 152         wxMenuItem *item = (wxMenuItem*)node->Data();
 153         if (item->IsSubMenu())
 154         {
 155             result = FindMenuItemByIdRecursive( item->GetSubMenu(), id );
 156         }
 157         node = node->Next();
 158     }
 159
 160     return result;
 161 }
 162
 163 wxMenuItem* wxMenuBar::FindItem( int id ) const
 164 {
 165     wxMenuItem* result = 0;
 166     wxNode *node = m_menus.First();
 167     while (node && result == 0)
 168     {
 169         wxMenu *menu = (wxMenu*)node->Data();
 170         result = FindMenuItemByIdRecursive( menu, id );
 171         node = node->Next();
 172     }
 173
 174     return result;
 175 }
 176
 177 void wxMenuBar::Check( int id, bool check )
 178 {
 179     wxMenuItem* item = FindMenuItemById( id );
 180
 181     wxCHECK_RET( item, "wxMenuBar::Check: no such item" );
 182
 183     item->Check(check);
 184 }
 185
 186 bool wxMenuBar::IsChecked( int id ) const
 187 {
 188     wxMenuItem* item = FindMenuItemById( id );
 189
 190     wxCHECK_MSG( item, FALSE, "wxMenuBar::IsChecked: no such item" );
 191
 192     return item->IsChecked();
 193 }
 194
 195 void wxMenuBar::Enable( int id, bool enable )
 196 {
 197     wxMenuItem* item = FindMenuItemById( id );
 198
 199     wxCHECK_RET( item, "wxMenuBar::Enable: no such item" );
 200
 201     item->Enable(enable);
 202 }
 203
 204 bool wxMenuBar::IsEnabled( int id ) const
 205 {
 206     wxMenuItem* item = FindMenuItemById( id );
 207
 208     wxCHECK_MSG( item, FALSE, "wxMenuBar::IsEnabled: no such item" );
 209
 210     return item->IsEnabled();
 211 }
 212
 213 wxString wxMenuBar::GetLabel( int id ) const
 214 {
 215     wxMenuItem* item = FindMenuItemById( id );
 216
 217     wxCHECK_MSG( item, "", "wxMenuBar::GetLabel: no such item" );
 218
 219     return item->GetText();
 220 }
 221
 222 void wxMenuBar::SetLabel( int id, const wxString &label )
 223 {
 224     wxMenuItem* item = FindMenuItemById( id );
 225
 226     wxCHECK_RET( item, "wxMenuBar::SetLabel: no such item" );
 227
 228     item->SetText( label );
 229 }
 230
 231 void wxMenuBar::EnableTop( int pos, bool flag )
 232 {
 233     wxNode *node = m_menus.Nth( pos );
 234
 235     wxCHECK_RET( node, "menu not found" );
 236
 237     wxMenu* menu = (wxMenu*)node->Data();
 238
 239     if (menu->m_owner)
 240         gtk_widget_set_sensitive( menu->m_owner, flag );
 241 }
 242
 243 wxString wxMenuBar::GetLabelTop( int pos ) const
 244 {
 245     wxNode *node = m_menus.Nth( pos );
 246
 247     wxCHECK_MSG( node, "invalid", "menu not found" );
 248
 249     wxMenu* menu = (wxMenu*)node->Data();
 250
 251     return menu->GetTitle();
 252 }
 253
 254 void wxMenuBar::SetLabelTop( int pos, const wxString& label )
 255 {
 256     wxNode *node = m_menus.Nth( pos );
 257
 258     wxCHECK_RET( node, "menu not found" );
 259
 260     wxMenu* menu = (wxMenu*)node->Data();
 261
 262     menu->SetTitle( label );
 263 }
 264
 265 void wxMenuBar::SetHelpString( int id, const wxString& helpString )
 266 {
 267     wxMenuItem* item = FindMenuItemById( id );
 268
 269     wxCHECK_RET( item, "wxMenuBar::SetHelpString: no such item" );
 270
 271     item->SetHelp( helpString );
 272 }
 273
 274 wxString wxMenuBar::GetHelpString( int id ) const
 275 {
 276     wxMenuItem* item = FindMenuItemById( id );
 277
 278     wxCHECK_MSG( item, "", "wxMenuBar::GetHelpString: no such item" );
 279
 280     return item->GetHelp();
 281 }
 282
 283 //-----------------------------------------------------------------------------
 284 // "activate"
 285 //-----------------------------------------------------------------------------
 286
 287 static void gtk_menu_clicked_callback( GtkWidget *widget, wxMenu *menu )
 288 {
 289     int id = menu->FindMenuIdByMenuItem(widget);
 290
 291     /* should find it for normal (not popup) menu */
 292     wxASSERT( (id != -1) || (menu->GetInvokingWindow() != NULL) );
 293
 294     if (!menu->IsEnabled(id))
 295         return;
 296
 297     wxMenuItem* item = menu->FindItem( id );
 298     wxCHECK_RET( item, "error in menu item callback" );
 299
 300     if (item->IsCheckable())
 301     {
 302         if (item->GetCheckedFlag() == item->IsChecked())
 303         {
 304             /* the menu item has been checked by calling wxMenuItem->Check() */
 305             return;
 306         }
 307         else
 308         {
 309             /* the user pressed on the menu item -> report */
 310             item->SetCheckedFlag(item->IsChecked());  /* make consistent again */
 311         }
 312     }
 313
 314     wxCommandEvent event( wxEVT_COMMAND_MENU_SELECTED, id );
 315     event.SetEventObject( menu );
 316     event.SetInt(id );
 317
 318     if (menu->GetCallback())
 319     {
 320         (void) (*(menu->GetCallback())) (*menu, event);
 321         return;
 322     }
 323
 324     if (menu->GetEventHandler()->ProcessEvent(event))
 325         return;
 326
 327     wxWindow *win = menu->GetInvokingWindow();
 328     if (win)
 329         win->GetEventHandler()->ProcessEvent( event );
 330 }
 331
 332 //-----------------------------------------------------------------------------
 333 // "select"
 334 //-----------------------------------------------------------------------------
 335
 336 static void gtk_menu_hilight_callback( GtkWidget *widget, wxMenu *menu )
 337 {
 338     int id = menu->FindMenuIdByMenuItem(widget);
 339
 340     wxASSERT( id != -1 ); // should find it!
 341
 342     if (!menu->IsEnabled(id))
 343         return;
 344
 345     wxMenuEvent event( wxEVT_MENU_HIGHLIGHT, id );
 346     event.SetEventObject( menu );
 347
 348 /*   wxMSW doesn't call callback here either
 349
 350      if (menu->m_callback)
 351      {
 352         (void) (*(menu->m_callback)) (*menu, event);
 353         return;
 354      }
 355 */
 356
 357     if (menu->GetEventHandler()->ProcessEvent(event))
 358         return;
 359
 360     wxWindow *win = menu->GetInvokingWindow();
 361     if (win) win->GetEventHandler()->ProcessEvent( event );
 362 }
 363
 364 //-----------------------------------------------------------------------------
 365 // "deselect"
 366 //-----------------------------------------------------------------------------
 367
 368 static void gtk_menu_nolight_callback( GtkWidget *widget, wxMenu *menu )
 369 {
 370     int id = menu->FindMenuIdByMenuItem(widget);
 371
 372     wxASSERT( id != -1 ); // should find it!
 373
 374     if (!menu->IsEnabled(id))
 375         return;
 376
 377     wxMenuEvent event( wxEVT_MENU_HIGHLIGHT, -1 );
 378     event.SetEventObject( menu );
 379
 380     if (menu->GetEventHandler()->ProcessEvent(event))
 381         return;
 382
 383     wxWindow *win = menu->GetInvokingWindow();
 384     if (win)
 385         win->GetEventHandler()->ProcessEvent( event );
 386 }
 387
 388 //-----------------------------------------------------------------------------
 389 // wxMenuItem
 390 //-----------------------------------------------------------------------------
 391
 392 IMPLEMENT_DYNAMIC_CLASS(wxMenuItem,wxObject)
 393
 394 wxMenuItem::wxMenuItem()
 395 {
 396     m_id = ID_SEPARATOR;
 397     m_isCheckMenu = FALSE;
 398     m_isChecked = FALSE;
 399     m_isEnabled = TRUE;
 400     m_subMenu = (wxMenu *) NULL;
 401     m_menuItem = (GtkWidget *) NULL;
 402 }
 403
 404 // it's valid for this function to be called even if m_menuItem == NULL
 405 void wxMenuItem::SetName( const wxString& str )
 406 {
 407     m_text = "";
 408     for ( const char *pc = str; *pc != '\0'; pc++ )
 409     {
 410         if (*pc == '&')
 411         {
 412             pc++; /* skip it */
 413 #if (GTK_MINOR_VERSION > 0)
 414             m_text << '_';
 415 #endif
 416         }
 417         m_text << *pc;
 418     }
 419
 420     if (m_menuItem)
 421     {
 422         GtkLabel *label = GTK_LABEL( GTK_BIN(m_menuItem)->child );
 423         gtk_label_set( label, m_text.c_str());
 424     }
 425 }
 426
 427 void wxMenuItem::Check( bool check )
 428 {
 429     wxCHECK_RET( m_menuItem, "invalid menu item" );
 430
 431     wxCHECK_RET( IsCheckable(), "Can't check uncheckable item!" )
 432
 433     if (check == m_isChecked) return;
 434
 435     m_isChecked = check;
 436     gtk_check_menu_item_set_state( (GtkCheckMenuItem*)m_menuItem, (gint)check );
 437 }
 438
 439 void wxMenuItem::Enable( bool enable )
 440 {
 441     wxCHECK_RET( m_menuItem, "invalid menu item" );
 442
 443     gtk_widget_set_sensitive( m_menuItem, enable );
 444     m_isEnabled = enable;
 445 }
 446
 447 bool wxMenuItem::IsChecked() const
 448 {
 449     wxCHECK_MSG( m_menuItem, FALSE, "invalid menu item" );
 450
 451     wxCHECK( IsCheckable(), FALSE ); // can't get state of uncheckable item!
 452
 453     bool bIsChecked = ((GtkCheckMenuItem*)m_menuItem)->active != 0;
 454
 455     return bIsChecked;
 456 }
 457
 458 //-----------------------------------------------------------------------------
 459 // wxMenu
 460 //-----------------------------------------------------------------------------
 461
 462 IMPLEMENT_DYNAMIC_CLASS(wxMenu,wxEvtHandler)
 463
 464 wxMenu::wxMenu( const wxString& title, const wxFunction func )
 465 {
 466     m_title = title;
 467     m_items.DeleteContents( TRUE );
 468     m_invokingWindow = (wxWindow *) NULL;
 469
 470 #if (GTK_MINOR_VERSION > 0)
 471     m_accel = gtk_accel_group_new();
 472     m_factory = gtk_item_factory_new( GTK_TYPE_MENU, "<main>", m_accel );
 473     m_menu = gtk_item_factory_get_widget( m_factory, "<main>" );
 474 #else
 475     m_menu = gtk_menu_new();  // Do not show!
 476 #endif
 477
 478     m_callback = func;
 479     m_eventHandler = this;
 480     m_clientData = (void*) NULL;
 481
 482     if (m_title.IsNull()) m_title = "";
 483     if (m_title != "")
 484     {
 485         Append(-2, m_title);
 486         AppendSeparator();
 487     }
 488
 489     m_owner = (GtkWidget*) NULL;
 490 }
 491
 492 wxMenu::~wxMenu()
 493 {
 494     /* how do we delete an item-factory ? */
 495 }
 496
 497 void wxMenu::SetTitle( const wxString& title )
 498 {
 499     // TODO Waiting for something better
 500     m_title = title;
 501 }
 502
 503 const wxString wxMenu::GetTitle() const
 504 {
 505     return m_title;
 506 }
 507
 508 void wxMenu::AppendSeparator()
 509 {
 510     wxMenuItem *mitem = new wxMenuItem();
 511     mitem->SetId(ID_SEPARATOR);
 512
 513     GtkWidget *menuItem = gtk_menu_item_new();
 514     gtk_menu_append( GTK_MENU(m_menu), menuItem );
 515     gtk_widget_show( menuItem );
 516
 517     mitem->SetMenuItem(menuItem);
 518     m_items.Append( mitem );
 519 }
 520
 521 void wxMenu::Append( int id, const wxString &item, const wxString &helpStr, bool checkable )
 522 {
 523     wxMenuItem *mitem = new wxMenuItem();
 524     mitem->SetId(id);
 525     mitem->SetText(item);
 526     mitem->SetHelp(helpStr);
 527     mitem->SetCheckable(checkable);
 528     const char *text = mitem->GetText();
 529
 530 #if (GTK_MINOR_VERSION > 0)
 531     char buf[100];
 532     strcpy( buf, "/" );
 533     strcat( buf, text );
 534
 535     GtkItemFactoryEntry entry;
 536     entry.path = buf;
 537     entry.accelerator = (gchar*) NULL;
 538     entry.callback = (GtkItemFactoryCallback) gtk_menu_clicked_callback;
 539     entry.callback_action = 0;
 540     if (checkable)
 541         entry.item_type = "<CheckItem>";
 542     else
 543         entry.item_type = "<Item>";
 544
 545     gtk_item_factory_create_item( m_factory, &entry, (gpointer) this, 2 );  /* what is 2 ? */
 546
 547     /* in order to get the pointer to the item we need the item text _without_ underscores */
 548     wxString s = "<main>/";
 549     for ( const char *pc = text; *pc != '\0'; pc++ )
 550     {
 551         if (*pc == '_') pc++; /* skip it */
 552         s << *pc;
 553     }
 554
 555     GtkWidget *menuItem = gtk_item_factory_get_item( m_factory, s );
 556
 557 #else
 558
 559     GtkWidget *menuItem = checkable ? gtk_check_menu_item_new_with_label(text)
 560                                     : gtk_menu_item_new_with_label(text);
 561
 562     gtk_signal_connect( GTK_OBJECT(menuItem), "activate",
 563                         GTK_SIGNAL_FUNC(gtk_menu_clicked_callback),
 564                         (gpointer)this );
 565
 566     gtk_menu_append( GTK_MENU(m_menu), menuItem );
 567     gtk_widget_show( menuItem );
 568
 569 #endif
 570
 571     gtk_signal_connect( GTK_OBJECT(menuItem), "select",
 572                         GTK_SIGNAL_FUNC(gtk_menu_hilight_callback),
 573                         (gpointer)this );
 574
 575     gtk_signal_connect( GTK_OBJECT(menuItem), "deselect",
 576                         GTK_SIGNAL_FUNC(gtk_menu_nolight_callback),
 577                         (gpointer)this );
 578
 579     mitem->SetMenuItem(menuItem);
 580
 581     m_items.Append( mitem );
 582 }
 583
 584 void wxMenu::Append( int id, const wxString &text, wxMenu *subMenu, const wxString &helpStr )
 585 {
 586     wxMenuItem *mitem = new wxMenuItem();
 587     mitem->SetId(id);
 588     mitem->SetText(text);
 589     mitem->SetHelp(helpStr);
 590
 591     GtkWidget *menuItem = gtk_menu_item_new_with_label(mitem->GetText());
 592     mitem->SetMenuItem(menuItem);
 593     mitem->SetSubMenu(subMenu);
 594
 595     gtk_signal_connect( GTK_OBJECT(menuItem), "select",
 596                         GTK_SIGNAL_FUNC(gtk_menu_hilight_callback),
 597                         (gpointer*)this );
 598
 599     gtk_signal_connect( GTK_OBJECT(menuItem), "deselect",
 600                         GTK_SIGNAL_FUNC(gtk_menu_nolight_callback),
 601                         (gpointer*)this );
 602
 603     gtk_menu_item_set_submenu( GTK_MENU_ITEM(menuItem), subMenu->m_menu );
 604     gtk_menu_append( GTK_MENU(m_menu), menuItem );
 605     gtk_widget_show( menuItem );
 606     m_items.Append( mitem );
 607 }
 608
 609 void wxMenu::Append( wxMenuItem *item )
 610 {
 611     m_items.Append( item );
 612
 613     GtkWidget *menuItem = (GtkWidget*) NULL;
 614
 615     if (item->IsSeparator())
 616         menuItem = gtk_menu_item_new();
 617     else if (item->IsSubMenu())
 618         menuItem = gtk_menu_item_new_with_label(item->GetText());
 619     else
 620         menuItem = item->IsCheckable() ? gtk_check_menu_item_new_with_label(item->GetText())
 621                                        : gtk_menu_item_new_with_label(item->GetText());
 622
 623     if (!item->IsSeparator())
 624     {
 625         gtk_signal_connect( GTK_OBJECT(menuItem), "select",
 626                             GTK_SIGNAL_FUNC(gtk_menu_hilight_callback),
 627                             (gpointer*)this );
 628
 629         gtk_signal_connect( GTK_OBJECT(menuItem), "deselect",
 630                             GTK_SIGNAL_FUNC(gtk_menu_nolight_callback),
 631                             (gpointer*)this );
 632
 633         if (!item->IsSubMenu())
 634         {
 635             gtk_signal_connect( GTK_OBJECT(menuItem), "activate",
 636                                 GTK_SIGNAL_FUNC(gtk_menu_clicked_callback),
 637                                 (gpointer*)this );
 638         }
 639     }
 640
 641     gtk_menu_append( GTK_MENU(m_menu), menuItem );
 642     gtk_widget_show( menuItem );
 643     item->SetMenuItem(menuItem);
 644 }
 645
 646 int wxMenu::FindItem( const wxString itemString ) const
 647 {
 648     wxString s = "";
 649     for ( const char *pc = itemString; *pc != '\0'; pc++ )
 650     {
 651         if (*pc == '&')
 652         {
 653             pc++; /* skip it */
 654 #if (GTK_MINOR_VERSION > 0)
 655             s << '_';
 656 #endif
 657         }
 658         s << *pc;
 659     }
 660
 661     wxNode *node = m_items.First();
 662     while (node)
 663     {
 664         wxMenuItem *item = (wxMenuItem*)node->Data();
 665         if (item->GetText() == s)
 666         {
 667             return item->GetId();
 668         }
 669         node = node->Next();
 670     }
 671
 672     return wxNOT_FOUND;
 673 }
 674
 675 void wxMenu::Enable( int id, bool enable )
 676 {
 677     wxMenuItem *item = FindItem(id);
 678
 679     wxCHECK_RET( item, "wxMenu::Enable: no such item" );
 680
 681     item->Enable(enable);
 682 }
 683
 684 bool wxMenu::IsEnabled( int id ) const
 685 {
 686     wxMenuItem *item = FindItem(id);
 687
 688     wxCHECK_MSG( item, FALSE, "wxMenu::IsEnabled: no such item" );
 689
 690     return item->IsEnabled();
 691 }
 692
 693 void wxMenu::Check( int id, bool enable )
 694 {
 695     wxMenuItem *item = FindItem(id);
 696
 697     wxCHECK_RET( item, "wxMenu::Check: no such item" );
 698
 699     item->Check(enable);
 700 }
 701
 702 bool wxMenu::IsChecked( int id ) const
 703 {
 704     wxMenuItem *item = FindItem(id);
 705
 706     wxCHECK_MSG( item, FALSE, "wxMenu::IsChecked: no such item" );
 707
 708     return item->IsChecked();
 709 }
 710
 711 void wxMenu::SetLabel( int id, const wxString &label )
 712 {
 713     wxMenuItem *item = FindItem(id);
 714
 715     wxCHECK_RET( item, "wxMenu::SetLabel: no such item" );
 716
 717     item->SetText(label);
 718 }
 719
 720 wxString wxMenu::GetLabel( int id ) const
 721 {
 722     wxMenuItem *item = FindItem(id);
 723
 724     wxCHECK_MSG( item, "", "wxMenu::GetLabel: no such item" );
 725
 726     return item->GetText();
 727 }
 728
 729 void wxMenu::SetHelpString( int id, const wxString& helpString )
 730 {
 731     wxMenuItem *item = FindItem(id);
 732
 733     wxCHECK_RET( item, "wxMenu::SetHelpString: no such item" );
 734
 735     item->SetHelp( helpString );
 736 }
 737
 738 wxString wxMenu::GetHelpString( int id ) const
 739 {
 740     wxMenuItem *item = FindItem(id);
 741
 742     wxCHECK_MSG( item, "", "wxMenu::GetHelpString: no such item" );
 743
 744     return item->GetHelp();
 745 }
 746
 747 int wxMenu::FindMenuIdByMenuItem( GtkWidget *menuItem ) const
 748 {
 749     wxNode *node = m_items.First();
 750     while (node)
 751     {
 752         wxMenuItem *item = (wxMenuItem*)node->Data();
 753         if (item->GetMenuItem() == menuItem)
 754            return item->GetId();
 755         node = node->Next();
 756     }
 757
 758     return wxNOT_FOUND;
 759 }
 760
 761 wxMenuItem *wxMenu::FindItem(int id) const
 762 {
 763     wxNode *node = m_items.First();
 764     while (node)
 765     {
 766         wxMenuItem *item = (wxMenuItem*)node->Data();
 767         if (item->GetId() == id)
 768         {
 769             return item;
 770         }
 771         node = node->Next();
 772     }
 773
 774     /* Not finding anything here can be correct
 775      * when search the entire menu system for
 776      * an entry -> no error message. */
 777
 778     return (wxMenuItem *) NULL;
 779 }
 780
 781 void wxMenu::SetInvokingWindow( wxWindow *win )
 782 {
 783     m_invokingWindow = win;
 784 }
 785
 786 wxWindow *wxMenu::GetInvokingWindow()
 787 {
 788     return m_invokingWindow;
 789 }
 790
 791 // Update a menu and all submenus recursively. source is the object that has
 792 // the update event handlers defined for it. If NULL, the menu or associated
 793 // window will be used.
 794 void wxMenu::UpdateUI(wxEvtHandler* source)
 795 {
 796   if (!source && GetInvokingWindow())
 797     source = GetInvokingWindow()->GetEventHandler();
 798   if (!source)
 799     source = GetEventHandler();
 800   if (!source)
 801     source = this;
 802
 803   wxNode* node = GetItems().First();
 804   while (node)
 805   {
 806     wxMenuItem* item = (wxMenuItem*) node->Data();
 807     if ( !item->IsSeparator() )
 808     {
 809       wxWindowID id = item->GetId();
 810       wxUpdateUIEvent event(id);
 811       event.SetEventObject( source );
 812
 813       if (source->ProcessEvent(event))
 814       {
 815         if (event.GetSetText())
 816           SetLabel(id, event.GetText());
 817         if (event.GetSetChecked())
 818           Check(id, event.GetChecked());
 819         if (event.GetSetEnabled())
 820           Enable(id, event.GetEnabled());
 821       }
 822
 823       if (item->GetSubMenu())
 824         item->GetSubMenu()->UpdateUI(source);
 825     }
 826     node = node->Next();
 827   }
 828 }
 829