src/msw/menu.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        menu.cpp
   3 // Purpose:     wxMenu, wxMenuBar, wxMenuItem
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "menu.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/frame.h"
  33     #include "wx/menu.h"
  34     #include "wx/utils.h"
  35     #include "wx/intl.h"
  36 #endif
  37
  38 #if wxUSE_OWNER_DRAWN
  39     #include "wx/ownerdrw.h"
  40 #endif
  41
  42 #include "wx/msw/private.h"
  43 #include "wx/msw/menu.h"
  44 #include "wx/menuitem.h"
  45 #include "wx/log.h"
  46
  47 // other standard headers
  48 #include <string.h>
  49
  50 // ----------------------------------------------------------------------------
  51 // global variables
  52 // ----------------------------------------------------------------------------
  53
  54 extern wxMenu *wxCurrentPopupMenu;
  55
  56 // ----------------------------------------------------------------------------
  57 // constants
  58 // ----------------------------------------------------------------------------
  59
  60 // the (popup) menu title has this special id
  61 static const int idMenuTitle = -2;
  62
  63 // ----------------------------------------------------------------------------
  64 // macros
  65 // ----------------------------------------------------------------------------
  66
  67 #if !USE_SHARED_LIBRARY
  68     IMPLEMENT_DYNAMIC_CLASS(wxMenu, wxEvtHandler)
  69     IMPLEMENT_DYNAMIC_CLASS(wxMenuBar, wxEvtHandler)
  70 #endif
  71
  72 // ============================================================================
  73 // implementation
  74 // ============================================================================
  75
  76 // ---------------------------------------------------------------------------
  77 // wxMenu construction, adding and removing menu items
  78 // ---------------------------------------------------------------------------
  79
  80 // Construct a menu with optional title (then use append)
  81 void wxMenu::Init(const wxString& title, const wxFunction func )
  82 {
  83     m_title = title;
  84     m_parent = NULL;
  85     m_eventHandler = this;
  86     m_pInvokingWindow = NULL;
  87     m_doBreak = FALSE ;
  88     m_noItems = 0;
  89     m_menuBar = NULL;
  90     m_hMenu = (WXHMENU) CreatePopupMenu();
  91     m_savehMenu = 0 ;
  92     m_topLevelMenu = this;
  93     m_clientData = (void*) NULL;
  94
  95     if ( !!m_title )
  96     {
  97         Append(idMenuTitle, m_title) ;
  98         AppendSeparator() ;
  99     }
 100
 101     Callback(func);
 102 }
 103
 104 // The wxWindow destructor will take care of deleting the submenus.
 105 wxMenu::~wxMenu()
 106 {
 107     // free Windows resources
 108     if ( m_hMenu )
 109     {
 110         ::DestroyMenu((HMENU)m_hMenu);
 111         m_hMenu = 0;
 112     }
 113
 114     // delete submenus
 115     wxNode *node = m_menuItems.First();
 116     while ( node )
 117     {
 118         wxMenuItem *item = (wxMenuItem *)node->Data();
 119
 120         // Delete child menus.
 121         // Beware: they must not be appended to children list!!!
 122         // (because order of delete is significant)
 123         if ( item->IsSubMenu() )
 124             item->DeleteSubMenu();
 125
 126         wxNode *next = node->Next();
 127         delete item;
 128         delete node;
 129         node = next;
 130     }
 131 }
 132
 133 void wxMenu::Break()
 134 {
 135     m_doBreak = TRUE;
 136 }
 137
 138 // function appends a new item or submenu to the menu
 139 void wxMenu::Append(wxMenuItem *pItem)
 140 {
 141     wxCHECK_RET( pItem != NULL, wxT("can't append NULL item to the menu") );
 142
 143 #if wxUSE_ACCEL
 144     wxAcceleratorEntry *accel = wxGetAccelFromString(pItem->GetText());
 145     if ( accel ) {
 146         m_accels.Add(accel);
 147     }
 148 #endif // wxUSE_ACCEL
 149
 150     UINT flags = 0;
 151
 152     // if "Break" has just been called, insert a menu break before this item
 153     // (and don't forget to reset the flag)
 154     if ( m_doBreak ) {
 155         flags |= MF_MENUBREAK;
 156         m_doBreak = FALSE;
 157     }
 158
 159     if ( pItem->IsSeparator() ) {
 160         flags |= MF_SEPARATOR;
 161     }
 162
 163     // id is the numeric id for normal menu items and HMENU for submenus as
 164     // required by ::AppendMenu() API
 165     UINT id;
 166     wxMenu *submenu = pItem->GetSubMenu();
 167     if ( submenu != NULL ) {
 168         wxASSERT( submenu->GetHMenu() != (WXHMENU) NULL );
 169
 170         id = (UINT)submenu->GetHMenu();
 171         submenu->m_topLevelMenu = m_topLevelMenu;
 172         submenu->m_parent       = this;
 173         submenu->m_savehMenu    = (WXHMENU)id;
 174         submenu->m_hMenu        = 0;
 175
 176         flags |= MF_POPUP;
 177     }
 178     else {
 179         id = pItem->GetId();
 180     }
 181
 182     LPCTSTR pData;
 183
 184 #if wxUSE_OWNER_DRAWN
 185     if ( pItem->IsOwnerDrawn() ) {  // want to get {Measure|Draw}Item messages?
 186         // item draws itself, pass pointer to it in data parameter
 187         flags |= MF_OWNERDRAW;
 188         pData = (LPCTSTR)pItem;
 189     }
 190     else
 191 #endif
 192     {
 193         // menu is just a normal string (passed in data parameter)
 194         flags |= MF_STRING;
 195
 196         pData = (char*)pItem->GetText().c_str();
 197     }
 198
 199     if ( !::AppendMenu(GetHmenu(), flags, id, pData) )
 200     {
 201         wxLogLastError("AppendMenu");
 202     }
 203     else
 204     {
 205 #ifdef __WIN32__
 206         if ( (int)id == idMenuTitle )
 207         {
 208             // visually select the menu title
 209             MENUITEMINFO mii;
 210             mii.cbSize = sizeof(mii);
 211             mii.fMask = MIIM_STATE;
 212             mii.fState = MFS_DEFAULT;
 213
 214             if ( !SetMenuItemInfo(GetHmenu(), (unsigned)id, FALSE, &mii) )
 215             {
 216                 wxLogLastError(wxT("SetMenuItemInfo"));
 217             }
 218         }
 219 #endif // __WIN32__
 220
 221         m_menuItems.Append(pItem);
 222         m_noItems++;
 223     }
 224 }
 225
 226 void wxMenu::AppendSeparator()
 227 {
 228     Append(new wxMenuItem(this, ID_SEPARATOR));
 229 }
 230
 231 // Pullright item
 232 void wxMenu::Append(int id,
 233                     const wxString& label,
 234                     wxMenu *SubMenu,
 235                     const wxString& helpString)
 236 {
 237     Append(new wxMenuItem(this, id, label, helpString, FALSE, SubMenu));
 238 }
 239
 240 // Ordinary menu item
 241 void wxMenu::Append(int id,
 242                     const wxString& label,
 243                     const wxString& helpString,
 244                     bool checkable)
 245 {
 246     // 'checkable' parameter is useless for Windows.
 247     Append(new wxMenuItem(this, id, label, helpString, checkable));
 248 }
 249
 250 // delete item by id
 251 void wxMenu::Delete(int id)
 252 {
 253     wxMenuItem *item = NULL;
 254     int pos;
 255     wxNode *node;
 256     for (pos = 0, node = m_menuItems.First(); node; node = node->Next(), pos++)
 257     {
 258         item = (wxMenuItem *)node->Data();
 259         if ( item->GetId() == id )
 260             break;
 261     }
 262
 263     wxCHECK_RET( node, wxT("wxMenu::Delete(): item doesn't exist") );
 264
 265     HMENU menu = GetHmenu();
 266
 267     wxMenu *pSubMenu = item->GetSubMenu();
 268     if ( pSubMenu != NULL ) {
 269         RemoveMenu(menu, (UINT)pos, MF_BYPOSITION);
 270         pSubMenu->m_hMenu = pSubMenu->m_savehMenu;
 271         pSubMenu->m_savehMenu = 0;
 272         pSubMenu->m_parent = NULL;
 273         //     RemoveChild(item->subMenu);
 274         pSubMenu->m_topLevelMenu = NULL;
 275         // TODO: Why isn't subMenu deleted here???
 276         // Will put this in for now. Assuming this is supposed
 277         // to delete the menu, not just remove it.
 278         item->DeleteSubMenu();
 279     }
 280     else {
 281         DeleteMenu(menu, (UINT)pos, MF_BYPOSITION);
 282     }
 283
 284     m_menuItems.DeleteNode(node);
 285     delete item;
 286 }
 287
 288 #if wxUSE_ACCEL
 289
 290 // ---------------------------------------------------------------------------
 291 // accelerator helpers
 292 // ---------------------------------------------------------------------------
 293
 294 // create the wxAcceleratorEntries for our accels and put them into provided
 295 // array - return the number of accels we have
 296 size_t wxMenu::CopyAccels(wxAcceleratorEntry *accels) const
 297 {
 298     size_t count = GetAccelCount();
 299     for ( size_t n = 0; n < count; n++ )
 300     {
 301         *accels++ = *m_accels[n];
 302     }
 303
 304     return count;
 305 }
 306
 307 #endif // wxUSE_ACCEL
 308
 309 // ---------------------------------------------------------------------------
 310 // wxMenu functions implemented in wxMenuItem
 311 // ---------------------------------------------------------------------------
 312
 313 void wxMenu::Enable(int id, bool Flag)
 314 {
 315     wxMenuItem *item = FindItemForId(id);
 316     wxCHECK_RET( item != NULL, wxT("can't enable non-existing menu item") );
 317
 318     item->Enable(Flag);
 319 }
 320
 321 bool wxMenu::IsEnabled(int id) const
 322 {
 323     wxMenuItem *item = FindItemForId(id);
 324     wxCHECK_MSG( item != NULL, FALSE, wxT("invalid item id") );
 325
 326     return item->IsEnabled();
 327 }
 328
 329 void wxMenu::Check(int id, bool Flag)
 330 {
 331     wxMenuItem *item = FindItemForId(id);
 332     wxCHECK_RET( item != NULL, wxT("can't get status of non-existing menu item") );
 333
 334     item->Check(Flag);
 335 }
 336
 337 bool wxMenu::IsChecked(int id) const
 338 {
 339     wxMenuItem *item = FindItemForId(id);
 340     wxCHECK_MSG( item != NULL, FALSE, wxT("invalid item id") );
 341
 342     return item->IsChecked();
 343 }
 344
 345 void wxMenu::SetLabel(int id, const wxString& label)
 346 {
 347     wxMenuItem *item = FindItemForId(id) ;
 348     wxCHECK_RET( item, wxT("wxMenu::SetLabel: no such item") );
 349
 350     item->SetText(label);
 351 }
 352
 353 wxString wxMenu::GetLabel(int id) const
 354 {
 355     wxString label;
 356     wxMenuItem *pItem = FindItemForId(id) ;
 357     if (pItem)
 358         label = pItem->GetText() ;
 359     else
 360         wxFAIL_MSG(wxT("wxMenu::GetLabel: item doesn't exist"));
 361
 362     return label;
 363 }
 364
 365 void wxMenu::SetHelpString(int itemId, const wxString& helpString)
 366 {
 367     wxMenuItem *item = FindItemForId (itemId);
 368     if (item)
 369         item->SetHelp(helpString);
 370     else
 371         wxFAIL_MSG(wxT("wxMenu::SetHelpString: item doesn't exist"));
 372 }
 373
 374 wxString wxMenu::GetHelpString (int itemId) const
 375 {
 376     wxString help;
 377     wxMenuItem *item = FindItemForId (itemId);
 378     if (item)
 379         help = item->GetHelp();
 380     else
 381         wxFAIL_MSG(wxT("wxMenu::GetHelpString: item doesn't exist"));
 382
 383     return help;
 384 }
 385
 386 // ---------------------------------------------------------------------------
 387 // wxMenu title
 388 // ---------------------------------------------------------------------------
 389
 390 void wxMenu::SetTitle(const wxString& label)
 391 {
 392     bool hasNoTitle = m_title.IsEmpty();
 393     m_title = label;
 394
 395     HMENU hMenu = GetHmenu();
 396
 397     if ( hasNoTitle )
 398     {
 399         if ( !label.IsEmpty() )
 400         {
 401             if ( !InsertMenu(hMenu, 0u, MF_BYPOSITION | MF_STRING,
 402                              (unsigned)idMenuTitle, m_title) ||
 403                  !InsertMenu(hMenu, 1u, MF_BYPOSITION, (unsigned)-1, NULL) )
 404             {
 405                 wxLogLastError(wxT("InsertMenu"));
 406             }
 407         }
 408     }
 409     else
 410     {
 411         if ( label.IsEmpty() )
 412         {
 413             // remove the title and the separator after it
 414             if ( !RemoveMenu(hMenu, 0, MF_BYPOSITION) ||
 415                  !RemoveMenu(hMenu, 0, MF_BYPOSITION) )
 416             {
 417                 wxLogLastError("RemoveMenu");
 418             }
 419         }
 420         else
 421         {
 422             // modify the title
 423             if ( !ModifyMenu(hMenu, 0u,
 424                         MF_BYPOSITION | MF_STRING,
 425                         (unsigned)idMenuTitle, m_title) )
 426             {
 427                 wxLogLastError("ModifyMenu");
 428             }
 429         }
 430     }
 431
 432 #ifdef __WIN32__
 433     // put the title string in bold face
 434     if ( !m_title.IsEmpty() )
 435     {
 436         MENUITEMINFO mii;
 437         mii.cbSize = sizeof(mii);
 438         mii.fMask = MIIM_STATE;
 439         mii.fState = MFS_DEFAULT;
 440
 441         if ( !SetMenuItemInfo(hMenu, (unsigned)idMenuTitle, FALSE, &mii) )
 442         {
 443             wxLogLastError("SetMenuItemInfo");
 444         }
 445     }
 446 #endif
 447 }
 448
 449 const wxString wxMenu::GetTitle() const
 450 {
 451     return m_title;
 452 }
 453
 454 // ---------------------------------------------------------------------------
 455 // event processing
 456 // ---------------------------------------------------------------------------
 457
 458 bool wxMenu::MSWCommand(WXUINT WXUNUSED(param), WXWORD id)
 459 {
 460     // ignore commands from the menu title
 461
 462     // NB: VC++ generates wrong assembler for `if ( id != idMenuTitle )'!!
 463     if ( id != (WXWORD)idMenuTitle )
 464     {
 465         wxCommandEvent event(wxEVT_COMMAND_MENU_SELECTED);
 466         event.SetEventObject( this );
 467         event.SetId( id );
 468         event.SetInt( id );
 469         ProcessCommand(event);
 470     }
 471
 472     return TRUE;
 473 }
 474
 475 bool wxMenu::ProcessCommand(wxCommandEvent & event)
 476 {
 477     bool processed = FALSE;
 478
 479     // Try a callback
 480     if (m_callback)
 481     {
 482         (void)(*(m_callback))(*this, event);
 483         processed = TRUE;
 484     }
 485
 486     // Try the menu's event handler
 487     if ( !processed && GetEventHandler())
 488     {
 489         processed = GetEventHandler()->ProcessEvent(event);
 490     }
 491
 492     // Try the window the menu was popped up from (and up through the
 493     // hierarchy)
 494     wxWindow *win = GetInvokingWindow();
 495     if ( !processed && win )
 496         processed = win->GetEventHandler()->ProcessEvent(event);
 497
 498     return processed;
 499 }
 500
 501 // ---------------------------------------------------------------------------
 502 // Item search
 503 // ---------------------------------------------------------------------------
 504
 505 // Finds the item id matching the given string, -1 if not found.
 506 int wxMenu::FindItem (const wxString& itemString) const
 507 {
 508     wxString itemLabel = wxStripMenuCodes(itemString);
 509     for ( wxNode *node = m_menuItems.First(); node; node = node->Next() )
 510     {
 511         wxMenuItem *item = (wxMenuItem *)node->Data();
 512         if ( item->IsSubMenu() )
 513         {
 514             int ans = item->GetSubMenu()->FindItem(itemString);
 515             if ( ans != wxNOT_FOUND )
 516                 return ans;
 517         }
 518         else if ( !item->IsSeparator() )
 519         {
 520             wxString label = wxStripMenuCodes(item->GetText());
 521             if ( itemLabel == label )
 522                 return item->GetId();
 523         }
 524     }
 525
 526     return wxNOT_FOUND;
 527 }
 528
 529 wxMenuItem *wxMenu::FindItemForId(int itemId, wxMenu ** itemMenu) const
 530 {
 531     if ( itemMenu )
 532         *itemMenu = NULL;
 533
 534     wxMenuItem *item = NULL;
 535     for ( wxNode *node = m_menuItems.First(); node && !item; node = node->Next() )
 536     {
 537         item = (wxMenuItem *)node->Data();
 538
 539         if ( item->GetId() == itemId )
 540         {
 541             if (itemMenu)
 542                 *itemMenu = (wxMenu *)this;
 543         }
 544         else if ( item->IsSubMenu() )
 545         {
 546             item = item->GetSubMenu()->FindItemForId(itemId, itemMenu);
 547         }
 548         else
 549         {
 550             // don't exit the loop
 551             item = NULL;
 552         }
 553     }
 554
 555     return item;
 556 }
 557
 558 // ---------------------------------------------------------------------------
 559 // other
 560 // ---------------------------------------------------------------------------
 561
 562 void wxMenu::Attach(wxMenuBar *menubar)
 563 {
 564     // menu can be in at most one menubar because otherwise they would both
 565     // delete the menu pointer
 566     wxASSERT_MSG( !m_menuBar, wxT("menu belongs to 2 menubars, expect a crash") );
 567
 568     m_menuBar = menubar;
 569     m_savehMenu = m_hMenu;
 570     m_hMenu = 0;
 571 }
 572
 573 void wxMenu::Detach()
 574 {
 575     wxASSERT_MSG( m_menuBar, wxT("can't detach menu if it's not attached") );
 576
 577     m_hMenu = m_savehMenu;
 578     m_savehMenu = 0;
 579 }
 580
 581 // ---------------------------------------------------------------------------
 582 // Menu Bar
 583 // ---------------------------------------------------------------------------
 584
 585 void wxMenuBar::Init()
 586 {
 587     m_eventHandler = this;
 588     m_menuCount = 0;
 589     m_menus = NULL;
 590     m_titles = NULL;
 591     m_menuBarFrame = NULL;
 592     m_hMenu = 0;
 593 }
 594
 595 wxMenuBar::wxMenuBar()
 596 {
 597     Init();
 598 }
 599
 600 wxMenuBar::wxMenuBar( long WXUNUSED(style) )
 601 {
 602     Init();
 603 }
 604
 605 wxMenuBar::wxMenuBar(int count, wxMenu *menus[], const wxString titles[])
 606 {
 607     Init();
 608
 609     m_menuCount = count;
 610     m_menus = menus;
 611     m_titles = new wxString[count];
 612
 613     int i;
 614     for ( i = 0; i < count; i++ )
 615         m_titles[i] = titles[i];
 616
 617     for ( i = 0; i < count; i++ )
 618         m_menus[i]->Attach(this);
 619 }
 620
 621 wxMenuBar::~wxMenuBar()
 622 {
 623     for ( int i = 0; i < m_menuCount; i++ )
 624     {
 625         delete m_menus[i];
 626     }
 627
 628     delete[] m_menus;
 629     delete[] m_titles;
 630 }
 631
 632 // ---------------------------------------------------------------------------
 633 // wxMenuBar helpers
 634 // ---------------------------------------------------------------------------
 635
 636 void wxMenuBar::Refresh()
 637 {
 638     wxCHECK_RET( m_menuBarFrame, wxT("can't refresh a menubar withotu a frame") );
 639
 640     DrawMenuBar((HWND)m_menuBarFrame->GetHWND()) ;
 641 }
 642
 643 WXHMENU wxMenuBar::Create()
 644 {
 645     if (m_hMenu != 0 )
 646     return m_hMenu;
 647
 648     wxCHECK_MSG( !m_hMenu, TRUE, wxT("menubar already created") );
 649
 650     m_hMenu = (WXHMENU)::CreateMenu();
 651
 652     if ( !m_hMenu )
 653     {
 654         wxLogLastError("CreateMenu");
 655     }
 656     else
 657     {
 658         for ( int i = 0; i < m_menuCount; i++ )
 659         {
 660             if ( !::AppendMenu((HMENU)m_hMenu, MF_POPUP | MF_STRING,
 661                                (UINT)m_menus[i]->GetHMenu(),
 662                                m_titles[i]) )
 663             {
 664                 wxLogLastError("AppendMenu");
 665             }
 666         }
 667     }
 668
 669     return m_hMenu;
 670 }
 671
 672 // ---------------------------------------------------------------------------
 673 // wxMenuBar functions forwarded to wxMenuItem
 674 // ---------------------------------------------------------------------------
 675
 676 // Must only be used AFTER menu has been attached to frame,
 677 // otherwise use individual menus to enable/disable items
 678 void wxMenuBar::Enable(int id, bool enable)
 679 {
 680     wxMenu *itemMenu = NULL;
 681     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 682
 683     wxCHECK_RET( item, wxT("attempt to enable an item which doesn't exist") );
 684
 685     item->Enable(enable);
 686 }
 687
 688 void wxMenuBar::EnableTop(int pos, bool enable)
 689 {
 690     int flag = enable ? MF_ENABLED : MF_GRAYED;;
 691
 692     EnableMenuItem((HMENU)m_hMenu, pos, MF_BYPOSITION | flag);
 693 }
 694
 695 // Must only be used AFTER menu has been attached to frame,
 696 // otherwise use individual menus
 697 void wxMenuBar::Check(int id, bool check)
 698 {
 699     wxMenu *itemMenu = NULL;
 700     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 701
 702     wxCHECK_RET( item, wxT("attempt to check an item which doesn't exist") );
 703     wxCHECK_RET( item->IsCheckable(), wxT("attempt to check an uncheckable item") );
 704
 705     item->Check(check);
 706 }
 707
 708 bool wxMenuBar::IsChecked(int id) const
 709 {
 710     wxMenu *itemMenu = NULL;
 711     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 712
 713     wxCHECK_MSG( item, FALSE, wxT("wxMenuBar::IsChecked(): no such item") );
 714
 715     int flag = ::GetMenuState(GetHmenuOf(itemMenu), id, MF_BYCOMMAND);
 716
 717     return (flag & MF_CHECKED) != 0;
 718 }
 719
 720 bool wxMenuBar::IsEnabled(int id) const
 721 {
 722     wxMenu *itemMenu = NULL;
 723     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 724
 725     wxCHECK_MSG( item, FALSE, wxT("wxMenuBar::IsEnabled(): no such item") );
 726
 727     int flag = ::GetMenuState(GetHmenuOf(itemMenu), id, MF_BYCOMMAND) ;
 728
 729     // don't "and" with MF_ENABLED because its value is 0
 730     return (flag & MF_DISABLED) == 0;
 731 }
 732
 733 void wxMenuBar::SetLabel(int id, const wxString& label)
 734 {
 735     wxMenu *itemMenu = NULL;
 736     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 737
 738     wxCHECK_RET( item, wxT("wxMenuBar::SetLabel(): no such item") );
 739
 740     item->SetText(label);
 741 }
 742
 743 wxString wxMenuBar::GetLabel(int id) const
 744 {
 745     wxMenu *itemMenu = NULL;
 746     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 747
 748     wxCHECK_MSG( item, wxEmptyString,
 749                  wxT("wxMenuBar::GetLabel(): no such item") );
 750
 751     return item->GetText();
 752 }
 753
 754 void wxMenuBar::SetHelpString (int id, const wxString& helpString)
 755 {
 756     wxMenu *itemMenu = NULL;
 757     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 758
 759     wxCHECK_RET( item, wxT("wxMenuBar::SetHelpString(): no such item") );
 760
 761     item->SetHelp(helpString);
 762 }
 763
 764 wxString wxMenuBar::GetHelpString (int id) const
 765 {
 766     wxMenu *itemMenu = NULL;
 767     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 768
 769     wxCHECK_MSG( item, wxT(""), wxT("wxMenuBar::GetHelpString(): no such item") );
 770
 771     return item->GetHelp();
 772 }
 773
 774 // ---------------------------------------------------------------------------
 775 // wxMenuBar functions to work with the top level submenus
 776 // ---------------------------------------------------------------------------
 777
 778 // NB: we don't support owner drawn top level items for now, if we do these
 779 //     functions would have to be changed to use wxMenuItem as well
 780
 781 void wxMenuBar::SetLabelTop(int pos, const wxString& label)
 782 {
 783     UINT id;
 784     UINT flagsOld = ::GetMenuState((HMENU)m_hMenu, pos, MF_BYPOSITION);
 785     if ( flagsOld == 0xFFFFFFFF )
 786     {
 787         wxLogLastError(wxT("GetMenuState"));
 788
 789         return;
 790     }
 791
 792     if ( flagsOld & MF_POPUP )
 793     {
 794         // HIBYTE contains the number of items in the submenu in this case
 795         flagsOld &= 0xff ;
 796         id = (UINT)::GetSubMenu((HMENU)m_hMenu, pos) ;
 797     }
 798     else
 799     {
 800         id = pos;
 801     }
 802
 803     if ( ::ModifyMenu(GetHmenu(), pos, MF_BYPOSITION | MF_STRING | flagsOld,
 804                       id, label) == (int)0xFFFFFFFF )
 805     {
 806         wxLogLastError("ModifyMenu");
 807     }
 808 }
 809
 810 wxString wxMenuBar::GetLabelTop(int pos) const
 811 {
 812     int len = ::GetMenuString((HMENU)m_hMenu, pos, NULL, 0, MF_BYCOMMAND);
 813
 814     len++;  // for the NUL character
 815     wxString label;
 816     ::GetMenuString(GetHmenu(), pos, label.GetWriteBuf(len), len, MF_BYCOMMAND);
 817     label.UngetWriteBuf();
 818
 819     return label;
 820 }
 821
 822 // ---------------------------------------------------------------------------
 823 // wxMenuBar notifications
 824 // ---------------------------------------------------------------------------
 825
 826 bool wxMenuBar::OnDelete(wxMenu *a_menu, int pos)
 827 {
 828     if ( !m_menuBarFrame )
 829         return TRUE;
 830
 831     if ( ::RemoveMenu((HMENU)m_hMenu, (UINT)pos, MF_BYPOSITION) )
 832     {
 833         // VZ: I'm not sure about what's going on here, so I leave an assert
 834         wxASSERT_MSG( m_menus[pos] == a_menu, wxT("what is this parameter for??") );
 835
 836         a_menu->Detach();
 837
 838         if ( m_menuBarFrame )
 839             Refresh();
 840
 841         return TRUE;
 842     }
 843     else
 844     {
 845         wxLogLastError("RemoveMenu");
 846     }
 847
 848     return FALSE;
 849 }
 850
 851 bool wxMenuBar::OnAppend(wxMenu *a_menu, const wxChar *title)
 852 {
 853     WXHMENU submenu = a_menu->GetHMenu();
 854     if ( !submenu )
 855         return FALSE;
 856
 857     if ( !m_menuBarFrame )
 858         return TRUE;
 859
 860     a_menu->Attach(this);
 861
 862     if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,
 863                        (UINT)submenu, title) )
 864     {
 865         wxLogLastError(wxT("AppendMenu"));
 866     }
 867
 868     Refresh();
 869
 870     return TRUE;
 871 }
 872
 873 // ---------------------------------------------------------------------------
 874 // wxMenuBar construction
 875 // ---------------------------------------------------------------------------
 876 int wxMenuBar::FindMenu(const wxString& title)
 877 {
 878     wxString menuTitle = wxStripMenuCodes(title);
 879     for ( int i = 0; i < m_menuCount; i++ )
 880     {
 881         wxString title = wxStripMenuCodes(m_titles[i]);
 882         if ( menuTitle == title )
 883             return i;
 884     }
 885
 886     return wxNOT_FOUND;
 887
 888 }
 889
 890
 891 void wxMenuBar::ReplaceMenu(int pos, wxMenu * new_menu, const wxString& title)
 892 {
 893     if (m_menuBarFrame) return;
 894
 895     if ( pos >= 0 && pos < m_menuCount )
 896     {
 897        wxMenu *old_menu = m_menus[pos];
 898        m_menus[pos] = new_menu;
 899        delete old_menu;
 900     }
 901
 902 }
 903
 904
 905 void wxMenuBar::Insert(int pos, wxMenu * menu, const wxString& title)
 906 {
 907     if (m_menuBarFrame) return;
 908     if ( pos < 0 && pos >= m_menuCount ) return;
 909
 910     m_menuCount ++;
 911     wxMenu **new_menus = new wxMenu *[m_menuCount];
 912     wxString *new_titles = new wxString[m_menuCount];
 913     int i;
 914
 915     for (i = 0; i < pos; i++)
 916     {
 917         new_menus[i] = m_menus[i];
 918         m_menus[i] = NULL;
 919         new_titles[i] = m_titles[i];
 920         m_titles[i] = wxT("");
 921     }
 922
 923     new_menus[pos] = (wxMenu *)menu;
 924     new_titles[i] = title;
 925
 926     for (i = pos+1; i < m_menuCount; i++)
 927     {
 928         new_menus[i] = m_menus[i-1];
 929         m_menus[i-1] = NULL;
 930         new_titles[i] = m_titles[i-1];
 931         m_titles[i-1] = wxT("");
 932     }
 933     if (m_menus)
 934     {
 935         delete[]m_menus;
 936         delete[]m_titles;
 937     }
 938     m_menus = new_menus;
 939     m_titles = new_titles;
 940
 941     menu->SetParent(this);
 942
 943 }
 944
 945
 946 void wxMenuBar::Append (wxMenu * menu, const wxString& title)
 947 {
 948     if (!OnAppend(menu, title))
 949         return;
 950
 951     m_menuCount ++;
 952     wxMenu **new_menus = new wxMenu *[m_menuCount];
 953     wxString *new_titles = new wxString[m_menuCount];
 954     int i;
 955
 956     for (i = 0; i < m_menuCount - 1; i++)
 957     {
 958         new_menus[i] = m_menus[i];
 959         m_menus[i] = NULL;
 960         new_titles[i] = m_titles[i];
 961         m_titles[i] = wxT("");
 962     }
 963     if (m_menus)
 964     {
 965         delete[]m_menus;
 966         delete[]m_titles;
 967     }
 968     m_menus = new_menus;
 969     m_titles = new_titles;
 970
 971     m_menus[m_menuCount - 1] = (wxMenu *)menu;
 972     m_titles[m_menuCount - 1] = title;
 973
 974     menu->SetParent(this);
 975 }
 976
 977 void wxMenuBar::Delete(wxMenu * menu, int i)
 978 {
 979     int j;
 980     int ii = (int) i;
 981
 982     if (menu != 0) {
 983         for (ii = 0; ii < m_menuCount; ii++) {
 984             if (m_menus[ii] == menu)
 985                 break;
 986         }
 987         if (ii >= m_menuCount)
 988             return;
 989     } else {
 990         if (ii < 0 || ii >= m_menuCount)
 991             return;
 992         menu = m_menus[ii];
 993     }
 994
 995     if (!OnDelete(menu, ii))
 996         return;
 997
 998     menu->SetParent(NULL);
 999
1000     -- m_menuCount;
1001     for (j = ii; j < m_menuCount; j++) {
1002         m_menus[j] = m_menus[j + 1];
1003         m_titles[j] = m_titles[j + 1];
1004     }
1005 }
1006
1007 void wxMenuBar::Attach(wxFrame *frame)
1008 {
1009     wxASSERT_MSG( !m_menuBarFrame, wxT("menubar already attached!") );
1010
1011     m_menuBarFrame = frame;
1012
1013 #if wxUSE_ACCEL
1014     // create the accel table - we consider that the menubar construction is
1015     // finished
1016     size_t nAccelCount = 0;
1017     int i;
1018     for ( i = 0; i < m_menuCount; i++ )
1019     {
1020         nAccelCount += m_menus[i]->GetAccelCount();
1021     }
1022
1023     if ( nAccelCount )
1024     {
1025         wxAcceleratorEntry *accelEntries = new wxAcceleratorEntry[nAccelCount];
1026
1027         nAccelCount = 0;
1028         for ( i = 0; i < m_menuCount; i++ )
1029         {
1030             nAccelCount += m_menus[i]->CopyAccels(&accelEntries[nAccelCount]);
1031         }
1032
1033         m_accelTable = wxAcceleratorTable(nAccelCount, accelEntries);
1034
1035         delete [] accelEntries;
1036     }
1037 #endif // wxUSE_ACCEL
1038 }
1039
1040 void wxMenuBar::Detach()
1041 {
1042 //    ::DestroyMenu((HMENU)m_hMenu);
1043     m_hMenu = (WXHMENU)NULL;
1044     m_menuBarFrame = NULL;
1045 }
1046
1047
1048 // ---------------------------------------------------------------------------
1049 // wxMenuBar searching for menu items
1050 // ---------------------------------------------------------------------------
1051
1052 // Find the itemString in menuString, and return the item id or wxNOT_FOUND
1053 int wxMenuBar::FindMenuItem(const wxString& menuString,
1054                             const wxString& itemString) const
1055 {
1056     wxString menuLabel = wxStripMenuCodes(menuString);
1057     for ( int i = 0; i < m_menuCount; i++ )
1058     {
1059         wxString title = wxStripMenuCodes(m_titles[i]);
1060         if ( menuString == title )
1061             return m_menus[i]->FindItem(itemString);
1062     }
1063
1064     return wxNOT_FOUND;
1065 }
1066
1067 wxMenuItem *wxMenuBar::FindItemForId (int id, wxMenu **itemMenu) const
1068 {
1069     if ( itemMenu )
1070         *itemMenu = NULL;
1071
1072     wxMenuItem *item = NULL;
1073     for ( int i = 0; !item && (i < m_menuCount); i++ )
1074     {
1075         item = m_menus[i]->FindItemForId(id, itemMenu);
1076     }
1077
1078     return item;
1079 }
1080
1081
1082 // ----------------------------------------------------------------------------
1083 // helper functions
1084 // ----------------------------------------------------------------------------
1085
1086 wxWindow *wxMenu::GetWindow() const
1087 {
1088     if ( m_pInvokingWindow != NULL )
1089         return m_pInvokingWindow;
1090     else if ( m_menuBar != NULL)
1091         return m_menuBar->GetFrame();
1092
1093     return NULL;
1094 }
1095
1096 WXHMENU wxMenu::GetHMenu() const
1097 {
1098     if ( m_hMenu != 0 )
1099         return m_hMenu;
1100     else if ( m_savehMenu != 0 )
1101         return m_savehMenu;
1102
1103     wxFAIL_MSG(wxT("wxMenu without HMENU"));
1104
1105     return 0;
1106 }
1107
1108 // Update a menu and all submenus recursively. source is the object that has
1109 // the update event handlers defined for it. If NULL, the menu or associated
1110 // window will be used.
1111 void wxMenu::UpdateUI(wxEvtHandler* source)
1112 {
1113     if (!source && GetInvokingWindow())
1114         source = GetInvokingWindow()->GetEventHandler();
1115     if (!source)
1116         source = GetEventHandler();
1117     if (!source)
1118         source = this;
1119
1120     wxNode* node = GetItems().First();
1121     while (node)
1122     {
1123         wxMenuItem* item = (wxMenuItem*) node->Data();
1124         if ( !item->IsSeparator() )
1125         {
1126             wxWindowID id = item->GetId();
1127             wxUpdateUIEvent event(id);
1128             event.SetEventObject( source );
1129
1130             if (source->ProcessEvent(event))
1131             {
1132                 if (event.GetSetText())
1133                     SetLabel(id, event.GetText());
1134                 if (event.GetSetChecked())
1135                     Check(id, event.GetChecked());
1136                 if (event.GetSetEnabled())
1137                     Enable(id, event.GetEnabled());
1138             }
1139
1140             if (item->GetSubMenu())
1141                 item->GetSubMenu()->UpdateUI(source);
1142         }
1143         node = node->Next();
1144     }
1145 }