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, _T("can't append NULL item to the menu") );
 142
 143 #if wxUSE_ACCEL
 144     // check for accelerators: they are given after '\t'
 145     wxString label = pItem->GetName();
 146     int posTab = label.Find(_T('\t'));
 147     if ( posTab != wxNOT_FOUND ) {
 148         // parse the accelerator string
 149         int keyCode = 0;
 150         int accelFlags = wxACCEL_NORMAL;
 151         wxString current;
 152         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 153             if ( (label[n] == '+') || (label[n] == '-') ) {
 154                 if ( current == _("ctrl") )
 155                     accelFlags |= wxACCEL_CTRL;
 156                 else if ( current == _("alt") )
 157                     accelFlags |= wxACCEL_ALT;
 158                 else if ( current == _("shift") )
 159                     accelFlags |= wxACCEL_SHIFT;
 160                 else {
 161                     wxLogDebug(_T("Unknown accel modifier: '%s'"),
 162                                current.c_str());
 163                 }
 164
 165                 current.Empty();
 166             }
 167             else {
 168                 current += wxTolower(label[n]);
 169             }
 170         }
 171
 172         if ( current.IsEmpty() ) {
 173             wxLogDebug(_T("No accel key found, accel string ignored."));
 174         }
 175         else {
 176             if ( current.Len() == 1 ) {
 177                 // it's a letter
 178                 keyCode = wxToupper(current[0U]);
 179             }
 180             else {
 181                 // it should be a function key
 182                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 183                      (current.Len() == 2 ||
 184                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 185                     int n;
 186                     wxSscanf(current.c_str() + 1, _T("%d"), &n);
 187
 188                     keyCode = VK_F1 + n - 1;
 189                 }
 190                 else {
 191                     wxLogDebug(_T("Unrecognized accel key '%s', accel "
 192                                   "string ignored."), current.c_str());
 193                 }
 194             }
 195         }
 196
 197         if ( keyCode ) {
 198             // do add an entry
 199             m_accelKeyCodes.Add(keyCode);
 200             m_accelFlags.Add(accelFlags);
 201             m_accelIds.Add(pItem->GetId());
 202         }
 203     }
 204 #endif // wxUSE_ACCEL
 205
 206     UINT flags = 0;
 207
 208     // if "Break" has just been called, insert a menu break before this item
 209     // (and don't forget to reset the flag)
 210     if ( m_doBreak ) {
 211         flags |= MF_MENUBREAK;
 212         m_doBreak = FALSE;
 213     }
 214
 215     if ( pItem->IsSeparator() ) {
 216         flags |= MF_SEPARATOR;
 217     }
 218
 219     // id is the numeric id for normal menu items and HMENU for submenus as
 220     // required by ::AppendMenu() API
 221     UINT id;
 222     wxMenu *submenu = pItem->GetSubMenu();
 223     if ( submenu != NULL ) {
 224         wxASSERT( submenu->GetHMenu() != (WXHMENU) NULL );
 225
 226         id = (UINT)submenu->GetHMenu();
 227         submenu->m_topLevelMenu = m_topLevelMenu;
 228         submenu->m_parent       = this;
 229         submenu->m_savehMenu    = (WXHMENU)id;
 230         submenu->m_hMenu        = 0;
 231
 232         flags |= MF_POPUP;
 233     }
 234     else {
 235         id = pItem->GetId();
 236     }
 237
 238     LPCTSTR pData;
 239
 240 #if wxUSE_OWNER_DRAWN
 241     if ( pItem->IsOwnerDrawn() ) {  // want to get {Measure|Draw}Item messages?
 242         // item draws itself, pass pointer to it in data parameter
 243         flags |= MF_OWNERDRAW;
 244         pData = (LPCTSTR)pItem;
 245     }
 246     else
 247 #endif
 248     {
 249         // menu is just a normal string (passed in data parameter)
 250         flags |= MF_STRING;
 251         pData = label;
 252     }
 253
 254     if ( !::AppendMenu(GetHmenu(), flags, id, pData) )
 255     {
 256         wxLogLastError("AppendMenu");
 257     }
 258     else
 259     {
 260 #ifdef __WIN32__
 261         if ( id == idMenuTitle )
 262         {
 263             // visually select the menu title
 264             MENUITEMINFO mii;
 265             mii.cbSize = sizeof(mii);
 266             mii.fMask = MIIM_STATE;
 267             mii.fState = MFS_DEFAULT;
 268
 269             if ( !SetMenuItemInfo(GetHmenu(), (unsigned)id, FALSE, &mii) )
 270             {
 271                 wxLogLastError(_T("SetMenuItemInfo"));
 272             }
 273         }
 274 #endif // __WIN32__
 275
 276         m_menuItems.Append(pItem);
 277         m_noItems++;
 278     }
 279 }
 280
 281 void wxMenu::AppendSeparator()
 282 {
 283     Append(new wxMenuItem(this, ID_SEPARATOR));
 284 }
 285
 286 // Pullright item
 287 void wxMenu::Append(int id,
 288                     const wxString& label,
 289                     wxMenu *SubMenu,
 290                     const wxString& helpString)
 291 {
 292     Append(new wxMenuItem(this, id, label, helpString, FALSE, SubMenu));
 293 }
 294
 295 // Ordinary menu item
 296 void wxMenu::Append(int id,
 297                     const wxString& label,
 298                     const wxString& helpString,
 299                     bool checkable)
 300 {
 301     // 'checkable' parameter is useless for Windows.
 302     Append(new wxMenuItem(this, id, label, helpString, checkable));
 303 }
 304
 305 // delete item by id
 306 void wxMenu::Delete(int id)
 307 {
 308     wxMenuItem *item = NULL;
 309     int pos;
 310     wxNode *node;
 311     for (pos = 0, node = m_menuItems.First(); node; node = node->Next(), pos++)
 312     {
 313         item = (wxMenuItem *)node->Data();
 314         if ( item->GetId() == id )
 315             break;
 316     }
 317
 318     wxCHECK_RET( node, _T("wxMenu::Delete(): item doesn't exist") );
 319
 320     HMENU menu = GetHmenu();
 321
 322     wxMenu *pSubMenu = item->GetSubMenu();
 323     if ( pSubMenu != NULL ) {
 324         RemoveMenu(menu, (UINT)pos, MF_BYPOSITION);
 325         pSubMenu->m_hMenu = pSubMenu->m_savehMenu;
 326         pSubMenu->m_savehMenu = 0;
 327         pSubMenu->m_parent = NULL;
 328         //     RemoveChild(item->subMenu);
 329         pSubMenu->m_topLevelMenu = NULL;
 330         // TODO: Why isn't subMenu deleted here???
 331         // Will put this in for now. Assuming this is supposed
 332         // to delete the menu, not just remove it.
 333         item->DeleteSubMenu();
 334     }
 335     else {
 336         DeleteMenu(menu, (UINT)pos, MF_BYPOSITION);
 337     }
 338
 339     m_menuItems.DeleteNode(node);
 340     delete item;
 341 }
 342
 343 #if wxUSE_ACCEL
 344
 345 // ---------------------------------------------------------------------------
 346 // accelerator helpers
 347 // ---------------------------------------------------------------------------
 348
 349 // create the wxAcceleratorEntries for our accels and put them into provided
 350 // array - return the number of accels we have
 351 size_t wxMenu::CopyAccels(wxAcceleratorEntry *accels) const
 352 {
 353     size_t count = GetAccelCount();
 354     for ( size_t n = 0; n < count; n++ )
 355     {
 356         (*accels++).Set(m_accelFlags[n], m_accelKeyCodes[n], m_accelIds[n]);
 357     }
 358
 359     return count;
 360 }
 361
 362 #endif // wxUSE_ACCEL
 363
 364 // ---------------------------------------------------------------------------
 365 // wxMenu functions implemented in wxMenuItem
 366 // ---------------------------------------------------------------------------
 367
 368 void wxMenu::Enable(int id, bool Flag)
 369 {
 370     wxMenuItem *item = FindItemForId(id);
 371     wxCHECK_RET( item != NULL, _T("can't enable non-existing menu item") );
 372
 373     item->Enable(Flag);
 374 }
 375
 376 bool wxMenu::IsEnabled(int id) const
 377 {
 378     wxMenuItem *item = FindItemForId(id);
 379     wxCHECK_MSG( item != NULL, FALSE, _T("invalid item id") );
 380
 381     return item->IsEnabled();
 382 }
 383
 384 void wxMenu::Check(int id, bool Flag)
 385 {
 386     wxMenuItem *item = FindItemForId(id);
 387     wxCHECK_RET( item != NULL, _T("can't get status of non-existing menu item") );
 388
 389     item->Check(Flag);
 390 }
 391
 392 bool wxMenu::IsChecked(int id) const
 393 {
 394     wxMenuItem *item = FindItemForId(id);
 395     wxCHECK_MSG( item != NULL, FALSE, _T("invalid item id") );
 396
 397     return item->IsChecked();
 398 }
 399
 400 void wxMenu::SetLabel(int id, const wxString& label)
 401 {
 402     wxMenuItem *item = FindItemForId(id) ;
 403     wxCHECK_RET( item, _T("wxMenu::SetLabel: no such item") );
 404
 405     item->SetName(label);
 406 }
 407
 408 wxString wxMenu::GetLabel(int id) const
 409 {
 410     wxString label;
 411     wxMenuItem *pItem = FindItemForId(id) ;
 412     if (pItem)
 413         label = pItem->GetName() ;
 414     else
 415         wxFAIL_MSG(_T("wxMenu::GetLabel: item doesn't exist"));
 416
 417     return label;
 418 }
 419
 420 void wxMenu::SetHelpString(int itemId, const wxString& helpString)
 421 {
 422     wxMenuItem *item = FindItemForId (itemId);
 423     if (item)
 424         item->SetHelp(helpString);
 425     else
 426         wxFAIL_MSG(_T("wxMenu::SetHelpString: item doesn't exist"));
 427 }
 428
 429 wxString wxMenu::GetHelpString (int itemId) const
 430 {
 431     wxString help;
 432     wxMenuItem *item = FindItemForId (itemId);
 433     if (item)
 434         help = item->GetHelp();
 435     else
 436         wxFAIL_MSG(_T("wxMenu::GetHelpString: item doesn't exist"));
 437
 438     return help;
 439 }
 440
 441 // ---------------------------------------------------------------------------
 442 // wxMenu title
 443 // ---------------------------------------------------------------------------
 444
 445 void wxMenu::SetTitle(const wxString& label)
 446 {
 447     bool hasNoTitle = m_title.IsEmpty();
 448     m_title = label;
 449
 450     HMENU hMenu = GetHmenu();
 451
 452     if ( hasNoTitle )
 453     {
 454         if ( !label.IsEmpty() )
 455         {
 456             if ( !InsertMenu(hMenu, 0u, MF_BYPOSITION | MF_STRING,
 457                              (unsigned)idMenuTitle, m_title) ||
 458                  !InsertMenu(hMenu, 1u, MF_BYPOSITION, (unsigned)-1, NULL) )
 459             {
 460                 wxLogLastError(_T("InsertMenu"));
 461             }
 462         }
 463     }
 464     else
 465     {
 466         if ( label.IsEmpty() )
 467         {
 468             // remove the title and the separator after it
 469             if ( !RemoveMenu(hMenu, 0, MF_BYPOSITION) ||
 470                  !RemoveMenu(hMenu, 0, MF_BYPOSITION) )
 471             {
 472                 wxLogLastError("RemoveMenu");
 473             }
 474         }
 475         else
 476         {
 477             // modify the title
 478             if ( !ModifyMenu(hMenu, 0u,
 479                         MF_BYPOSITION | MF_STRING,
 480                         (unsigned)idMenuTitle, m_title) )
 481             {
 482                 wxLogLastError("ModifyMenu");
 483             }
 484         }
 485     }
 486
 487 #ifdef __WIN32__
 488     // put the title string in bold face
 489     if ( !m_title.IsEmpty() )
 490     {
 491         MENUITEMINFO mii;
 492         mii.cbSize = sizeof(mii);
 493         mii.fMask = MIIM_STATE;
 494         mii.fState = MFS_DEFAULT;
 495
 496         if ( !SetMenuItemInfo(hMenu, (unsigned)idMenuTitle, FALSE, &mii) )
 497         {
 498             wxLogLastError("SetMenuItemInfo");
 499         }
 500     }
 501 #endif
 502 }
 503
 504 const wxString wxMenu::GetTitle() const
 505 {
 506     return m_title;
 507 }
 508
 509 // ---------------------------------------------------------------------------
 510 // event processing
 511 // ---------------------------------------------------------------------------
 512
 513 bool wxMenu::MSWCommand(WXUINT WXUNUSED(param), WXWORD id)
 514 {
 515     // ignore commands from the menu title
 516
 517     // NB: VC++ generates wrong assembler for `if ( id != idMenuTitle )'!!
 518     if ( id != (WXWORD)idMenuTitle )
 519     {
 520         wxCommandEvent event(wxEVT_COMMAND_MENU_SELECTED);
 521         event.SetEventObject( this );
 522         event.SetId( id );
 523         event.SetInt( id );
 524         ProcessCommand(event);
 525     }
 526
 527     return TRUE;
 528 }
 529
 530 bool wxMenu::ProcessCommand(wxCommandEvent & event)
 531 {
 532     bool processed = FALSE;
 533
 534     // Try a callback
 535     if (m_callback)
 536     {
 537         (void)(*(m_callback))(*this, event);
 538         processed = TRUE;
 539     }
 540
 541     // Try the menu's event handler
 542     if ( !processed && GetEventHandler())
 543     {
 544         processed = GetEventHandler()->ProcessEvent(event);
 545     }
 546
 547     // Try the window the menu was popped up from (and up through the
 548     // hierarchy)
 549     wxWindow *win = GetInvokingWindow();
 550     if ( !processed && win )
 551         processed = win->GetEventHandler()->ProcessEvent(event);
 552
 553     return processed;
 554 }
 555
 556 // ---------------------------------------------------------------------------
 557 // Item search
 558 // ---------------------------------------------------------------------------
 559
 560 // Finds the item id matching the given string, -1 if not found.
 561 int wxMenu::FindItem (const wxString& itemString) const
 562 {
 563     wxString itemLabel = wxStripMenuCodes(itemString);
 564     for ( wxNode *node = m_menuItems.First(); node; node = node->Next() )
 565     {
 566         wxMenuItem *item = (wxMenuItem *)node->Data();
 567         if ( item->IsSubMenu() )
 568         {
 569             int ans = item->GetSubMenu()->FindItem(itemString);
 570             if ( ans != wxNOT_FOUND )
 571                 return ans;
 572         }
 573         else if ( !item->IsSeparator() )
 574         {
 575             wxString label = wxStripMenuCodes(item->GetName());
 576             if ( itemLabel == label )
 577                 return item->GetId();
 578         }
 579     }
 580
 581     return wxNOT_FOUND;
 582 }
 583
 584 wxMenuItem *wxMenu::FindItemForId(int itemId, wxMenu ** itemMenu) const
 585 {
 586     if ( itemMenu )
 587         *itemMenu = NULL;
 588
 589     wxMenuItem *item = NULL;
 590     for ( wxNode *node = m_menuItems.First(); node && !item; node = node->Next() )
 591     {
 592         item = (wxMenuItem *)node->Data();
 593
 594         if ( item->GetId() == itemId )
 595         {
 596             if (itemMenu)
 597                 *itemMenu = (wxMenu *)this;
 598         }
 599         else if ( item->IsSubMenu() )
 600         {
 601             item = item->GetSubMenu()->FindItemForId(itemId, itemMenu);
 602         }
 603         else
 604         {
 605             // don't exit the loop
 606             item = NULL;
 607         }
 608     }
 609
 610     return item;
 611 }
 612
 613 // ---------------------------------------------------------------------------
 614 // other
 615 // ---------------------------------------------------------------------------
 616
 617 void wxMenu::Attach(wxMenuBar *menubar)
 618 {
 619     // menu can be in at most one menubar because otherwise they would both
 620     // delete the menu pointer
 621     wxASSERT_MSG( !m_menuBar, _T("menu belongs to 2 menubars, expect a crash") );
 622
 623     m_menuBar = menubar;
 624     m_savehMenu = m_hMenu;
 625     m_hMenu = 0;
 626 }
 627
 628 void wxMenu::Detach()
 629 {
 630     wxASSERT_MSG( m_menuBar, _T("can't detach menu if it's not attached") );
 631
 632     m_hMenu = m_savehMenu;
 633     m_savehMenu = 0;
 634 }
 635
 636 // ---------------------------------------------------------------------------
 637 // Menu Bar
 638 // ---------------------------------------------------------------------------
 639
 640 void wxMenuBar::Init()
 641 {
 642     m_eventHandler = this;
 643     m_menuCount = 0;
 644     m_menus = NULL;
 645     m_titles = NULL;
 646     m_menuBarFrame = NULL;
 647     m_hMenu = 0;
 648 }
 649
 650 wxMenuBar::wxMenuBar()
 651 {
 652     Init();
 653 }
 654
 655 wxMenuBar::wxMenuBar( long WXUNUSED(style) )
 656 {
 657     Init();
 658 }
 659
 660 wxMenuBar::wxMenuBar(int count, wxMenu *menus[], const wxString titles[])
 661 {
 662     Init();
 663
 664     m_menuCount = count;
 665     m_menus = menus;
 666     m_titles = new wxString[count];
 667
 668     int i;
 669     for ( i = 0; i < count; i++ )
 670         m_titles[i] = titles[i];
 671
 672     for ( i = 0; i < count; i++ )
 673         m_menus[i]->Attach(this);
 674 }
 675
 676 wxMenuBar::~wxMenuBar()
 677 {
 678     for ( int i = 0; i < m_menuCount; i++ )
 679     {
 680         delete m_menus[i];
 681     }
 682
 683     delete[] m_menus;
 684     delete[] m_titles;
 685 }
 686
 687 // ---------------------------------------------------------------------------
 688 // wxMenuBar helpers
 689 // ---------------------------------------------------------------------------
 690
 691 void wxMenuBar::Refresh()
 692 {
 693     wxCHECK_RET( m_menuBarFrame, _T("can't refresh a menubar withotu a frame") );
 694
 695     DrawMenuBar((HWND)m_menuBarFrame->GetHWND()) ;
 696 }
 697
 698 WXHMENU wxMenuBar::Create()
 699 {
 700     wxCHECK_MSG( !m_hMenu, TRUE, _T("menubar already created") );
 701
 702     m_hMenu = (WXHMENU)::CreateMenu();
 703
 704     if ( !m_hMenu )
 705     {
 706         wxLogLastError("CreateMenu");
 707     }
 708     else
 709     {
 710         for ( int i = 0; i < m_menuCount; i++ )
 711         {
 712             if ( !::AppendMenu((HMENU)m_hMenu, MF_POPUP | MF_STRING,
 713                                (UINT)m_menus[i]->GetHMenu(),
 714                                m_titles[i]) )
 715             {
 716                 wxLogLastError("AppendMenu");
 717             }
 718         }
 719     }
 720
 721     return m_hMenu;
 722 }
 723
 724 // ---------------------------------------------------------------------------
 725 // wxMenuBar functions forwarded to wxMenuItem
 726 // ---------------------------------------------------------------------------
 727
 728 // Must only be used AFTER menu has been attached to frame,
 729 // otherwise use individual menus to enable/disable items
 730 void wxMenuBar::Enable(int id, bool enable)
 731 {
 732     wxMenu *itemMenu = NULL;
 733     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 734
 735     wxCHECK_RET( item, _T("attempt to enable an item which doesn't exist") );
 736
 737     item->Enable(enable);
 738 }
 739
 740 void wxMenuBar::EnableTop(int pos, bool enable)
 741 {
 742     int flag = enable ? MF_ENABLED : MF_GRAYED;;
 743
 744     EnableMenuItem((HMENU)m_hMenu, pos, MF_BYPOSITION | flag);
 745 }
 746
 747 // Must only be used AFTER menu has been attached to frame,
 748 // otherwise use individual menus
 749 void wxMenuBar::Check(int id, bool check)
 750 {
 751     wxMenu *itemMenu = NULL;
 752     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 753
 754     wxCHECK_RET( item, _T("attempt to check an item which doesn't exist") );
 755     wxCHECK_RET( item->IsCheckable(), _T("attempt to check an uncheckable item") );
 756
 757     item->Check(check);
 758 }
 759
 760 bool wxMenuBar::IsChecked(int id) const
 761 {
 762     wxMenu *itemMenu = NULL;
 763     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 764
 765     wxCHECK_MSG( item, FALSE, _T("wxMenuBar::IsChecked(): no such item") );
 766
 767     int flag = ::GetMenuState(GetHmenuOf(itemMenu), id, MF_BYCOMMAND);
 768
 769     return (flag & MF_CHECKED) != 0;
 770 }
 771
 772 bool wxMenuBar::IsEnabled(int id) const
 773 {
 774     wxMenu *itemMenu = NULL;
 775     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 776
 777     wxCHECK_MSG( item, FALSE, _T("wxMenuBar::IsEnabled(): no such item") );
 778
 779     int flag = ::GetMenuState(GetHmenuOf(itemMenu), id, MF_BYCOMMAND) ;
 780
 781     // don't "and" with MF_ENABLED because its value is 0
 782     return (flag & MF_DISABLED) == 0;
 783 }
 784
 785 void wxMenuBar::SetLabel(int id, const wxString& label)
 786 {
 787     wxMenu *itemMenu = NULL;
 788     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 789
 790     wxCHECK_RET( item, _T("wxMenuBar::SetLabel(): no such item") );
 791
 792     item->SetName(label);
 793 }
 794
 795 wxString wxMenuBar::GetLabel(int id) const
 796 {
 797     wxMenu *itemMenu = NULL;
 798     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 799
 800     wxCHECK_MSG( item, _T(""), _T("wxMenuBar::GetLabel(): no such item") );
 801
 802     return item->GetName();
 803 }
 804
 805 void wxMenuBar::SetHelpString (int id, const wxString& helpString)
 806 {
 807     wxMenu *itemMenu = NULL;
 808     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 809
 810     wxCHECK_RET( item, _T("wxMenuBar::SetHelpString(): no such item") );
 811
 812     item->SetHelp(helpString);
 813 }
 814
 815 wxString wxMenuBar::GetHelpString (int id) const
 816 {
 817     wxMenu *itemMenu = NULL;
 818     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 819
 820     wxCHECK_MSG( item, _T(""), _T("wxMenuBar::GetHelpString(): no such item") );
 821
 822     return item->GetHelp();
 823 }
 824
 825 // ---------------------------------------------------------------------------
 826 // wxMenuBar functions to work with the top level submenus
 827 // ---------------------------------------------------------------------------
 828
 829 // NB: we don't support owner drawn top level items for now, if we do these
 830 //     functions would have to be changed to use wxMenuItem as well
 831
 832 void wxMenuBar::SetLabelTop(int pos, const wxString& label)
 833 {
 834     UINT id;
 835     UINT flagsOld = ::GetMenuState((HMENU)m_hMenu, pos, MF_BYPOSITION);
 836     if ( flagsOld == 0xFFFFFFFF )
 837     {
 838         wxLogLastError(_T("GetMenuState"));
 839
 840         return;
 841     }
 842
 843     if ( flagsOld & MF_POPUP )
 844     {
 845         // HIBYTE contains the number of items in the submenu in this case
 846         flagsOld &= 0xff ;
 847         id = (UINT)::GetSubMenu((HMENU)m_hMenu, pos) ;
 848     }
 849     else
 850     {
 851         id = pos;
 852     }
 853
 854     if ( ::ModifyMenu(GetHmenu(), pos, MF_BYPOSITION | MF_STRING | flagsOld,
 855                       id, label) == 0xFFFFFFFF )
 856     {
 857         wxLogLastError("ModifyMenu");
 858     }
 859 }
 860
 861 wxString wxMenuBar::GetLabelTop(int pos) const
 862 {
 863     int len = ::GetMenuString((HMENU)m_hMenu, pos, NULL, 0, MF_BYCOMMAND);
 864
 865     len++;  // for the NUL character
 866     wxString label;
 867     ::GetMenuString(GetHmenu(), pos, label.GetWriteBuf(len), len, MF_BYCOMMAND);
 868     label.UngetWriteBuf();
 869
 870     return label;
 871 }
 872
 873 // ---------------------------------------------------------------------------
 874 // wxMenuBar notifications
 875 // ---------------------------------------------------------------------------
 876
 877 bool wxMenuBar::OnDelete(wxMenu *a_menu, int pos)
 878 {
 879     if ( !m_menuBarFrame )
 880         return TRUE;
 881
 882     if ( ::RemoveMenu((HMENU)m_hMenu, (UINT)pos, MF_BYPOSITION) )
 883     {
 884         // VZ: I'm not sure about what's going on here, so I leave an assert
 885         wxASSERT_MSG( m_menus[pos] == a_menu, _T("what is this parameter for??") );
 886
 887         a_menu->Detach();
 888
 889         if ( m_menuBarFrame )
 890             Refresh();
 891
 892         return TRUE;
 893     }
 894     else
 895     {
 896         wxLogLastError("RemoveMenu");
 897     }
 898
 899     return FALSE;
 900 }
 901
 902 bool wxMenuBar::OnAppend(wxMenu *a_menu, const wxChar *title)
 903 {
 904     WXHMENU submenu = a_menu->GetHMenu();
 905     if ( !submenu )
 906         return FALSE;
 907
 908     if ( !m_menuBarFrame )
 909         return TRUE;
 910
 911     a_menu->Attach(this);
 912
 913     if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,
 914                        (UINT)submenu, title) )
 915     {
 916         wxLogLastError(_T("AppendMenu"));
 917     }
 918
 919     Refresh();
 920
 921     return TRUE;
 922 }
 923
 924 // ---------------------------------------------------------------------------
 925 // wxMenuBar construction
 926 // ---------------------------------------------------------------------------
 927
 928 void wxMenuBar::Append (wxMenu * menu, const wxString& title)
 929 {
 930     if (!OnAppend(menu, title))
 931         return;
 932
 933     m_menuCount ++;
 934     wxMenu **new_menus = new wxMenu *[m_menuCount];
 935     wxString *new_titles = new wxString[m_menuCount];
 936     int i;
 937
 938     for (i = 0; i < m_menuCount - 1; i++)
 939     {
 940         new_menus[i] = m_menus[i];
 941         m_menus[i] = NULL;
 942         new_titles[i] = m_titles[i];
 943         m_titles[i] = _T("");
 944     }
 945     if (m_menus)
 946     {
 947         delete[]m_menus;
 948         delete[]m_titles;
 949     }
 950     m_menus = new_menus;
 951     m_titles = new_titles;
 952
 953     m_menus[m_menuCount - 1] = (wxMenu *)menu;
 954     m_titles[m_menuCount - 1] = title;
 955
 956     menu->SetParent(this);
 957 }
 958
 959 void wxMenuBar::Delete(wxMenu * menu, int i)
 960 {
 961     int j;
 962     int ii = (int) i;
 963
 964     if (menu != 0) {
 965         for (ii = 0; ii < m_menuCount; ii++) {
 966             if (m_menus[ii] == menu)
 967                 break;
 968         }
 969         if (ii >= m_menuCount)
 970             return;
 971     } else {
 972         if (ii < 0 || ii >= m_menuCount)
 973             return;
 974         menu = m_menus[ii];
 975     }
 976
 977     if (!OnDelete(menu, ii))
 978         return;
 979
 980     menu->SetParent(NULL);
 981
 982     -- m_menuCount;
 983     for (j = ii; j < m_menuCount; j++) {
 984         m_menus[j] = m_menus[j + 1];
 985         m_titles[j] = m_titles[j + 1];
 986     }
 987 }
 988
 989 void wxMenuBar::Attach(wxFrame *frame)
 990 {
 991     wxASSERT_MSG( !m_menuBarFrame, _T("menubar already attached!") );
 992
 993     m_menuBarFrame = frame;
 994
 995 #if wxUSE_ACCEL
 996     // create the accel table - we consider that the menubar construction is
 997     // finished
 998     size_t nAccelCount = 0;
 999     int i;
1000     for ( i = 0; i < m_menuCount; i++ )
1001     {
1002         nAccelCount += m_menus[i]->GetAccelCount();
1003     }
1004
1005     if ( nAccelCount )
1006     {
1007         wxAcceleratorEntry *accelEntries = new wxAcceleratorEntry[nAccelCount];
1008
1009         nAccelCount = 0;
1010         for ( i = 0; i < m_menuCount; i++ )
1011         {
1012             nAccelCount += m_menus[i]->CopyAccels(&accelEntries[nAccelCount]);
1013         }
1014
1015         m_accelTable = wxAcceleratorTable(nAccelCount, accelEntries);
1016
1017         delete [] accelEntries;
1018     }
1019 #endif // wxUSE_ACCEL
1020 }
1021
1022 // ---------------------------------------------------------------------------
1023 // wxMenuBar searching for menu items
1024 // ---------------------------------------------------------------------------
1025
1026 // Find the itemString in menuString, and return the item id or wxNOT_FOUND
1027 int wxMenuBar::FindMenuItem(const wxString& menuString,
1028                             const wxString& itemString) const
1029 {
1030     wxString menuLabel = wxStripMenuCodes(menuString);
1031     for ( int i = 0; i < m_menuCount; i++ )
1032     {
1033         wxString title = wxStripMenuCodes(m_titles[i]);
1034         if ( menuString == title )
1035             return m_menus[i]->FindItem(itemString);
1036     }
1037
1038     return wxNOT_FOUND;
1039 }
1040
1041 wxMenuItem *wxMenuBar::FindItemForId (int id, wxMenu **itemMenu) const
1042 {
1043     if ( itemMenu )
1044         *itemMenu = NULL;
1045
1046     wxMenuItem *item = NULL;
1047     for ( int i = 0; !item && (i < m_menuCount); i++ )
1048     {
1049         item = m_menus[i]->FindItemForId(id, itemMenu);
1050     }
1051
1052     return item;
1053 }
1054
1055
1056 // ----------------------------------------------------------------------------
1057 // helper functions
1058 // ----------------------------------------------------------------------------
1059
1060 wxWindow *wxMenu::GetWindow() const
1061 {
1062     if ( m_pInvokingWindow != NULL )
1063         return m_pInvokingWindow;
1064     else if ( m_menuBar != NULL)
1065         return m_menuBar->GetFrame();
1066
1067     return NULL;
1068 }
1069
1070 WXHMENU wxMenu::GetHMenu() const
1071 {
1072     if ( m_hMenu != 0 )
1073         return m_hMenu;
1074     else if ( m_savehMenu != 0 )
1075         return m_savehMenu;
1076
1077     wxFAIL_MSG(_T("wxMenu without HMENU"));
1078
1079     return 0;
1080 }
1081
1082 // Update a menu and all submenus recursively. source is the object that has
1083 // the update event handlers defined for it. If NULL, the menu or associated
1084 // window will be used.
1085 void wxMenu::UpdateUI(wxEvtHandler* source)
1086 {
1087     if (!source && GetInvokingWindow())
1088         source = GetInvokingWindow()->GetEventHandler();
1089     if (!source)
1090         source = GetEventHandler();
1091     if (!source)
1092         source = this;
1093
1094     wxNode* node = GetItems().First();
1095     while (node)
1096     {
1097         wxMenuItem* item = (wxMenuItem*) node->Data();
1098         if ( !item->IsSeparator() )
1099         {
1100             wxWindowID id = item->GetId();
1101             wxUpdateUIEvent event(id);
1102             event.SetEventObject( source );
1103
1104             if (source->ProcessEvent(event))
1105             {
1106                 if (event.GetSetText())
1107                     SetLabel(id, event.GetText());
1108                 if (event.GetSetChecked())
1109                     Check(id, event.GetChecked());
1110                 if (event.GetSetEnabled())
1111                     Enable(id, event.GetEnabled());
1112             }
1113
1114             if (item->GetSubMenu())
1115                 item->GetSubMenu()->UpdateUI(source);
1116         }
1117         node = node->Next();
1118     }
1119 }