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 #endif
  36
  37 #if wxUSE_OWNER_DRAWN
  38     #include "wx/ownerdrw.h"
  39 #endif
  40
  41 #include "wx/msw/private.h"
  42 #include "wx/msw/menu.h"
  43 #include "wx/menuitem.h"
  44 #include "wx/log.h"
  45
  46 // other standard headers
  47 #include <string.h>
  48
  49 // ----------------------------------------------------------------------------
  50 // global variables
  51 // ----------------------------------------------------------------------------
  52
  53 extern wxMenu *wxCurrentPopupMenu;
  54
  55 // ----------------------------------------------------------------------------
  56 // constants
  57 // ----------------------------------------------------------------------------
  58
  59 // the (popup) menu title has this special id
  60 static const int idMenuTitle = -2;
  61
  62 // ----------------------------------------------------------------------------
  63 // macros
  64 // ----------------------------------------------------------------------------
  65
  66 #if !USE_SHARED_LIBRARY
  67     IMPLEMENT_DYNAMIC_CLASS(wxMenu, wxEvtHandler)
  68     IMPLEMENT_DYNAMIC_CLASS(wxMenuBar, wxEvtHandler)
  69 #endif
  70
  71 // convenience macros
  72 #define GetHMENU()          ((HMENU)GetHMenu())
  73 #define GetHMenuOf(menu)    ((HMENU)menu->GetHMenu())
  74
  75 // ============================================================================
  76 // implementation
  77 // ============================================================================
  78
  79 // ---------------------------------------------------------------------------
  80 // wxMenu construction, adding and removing menu items
  81 // ---------------------------------------------------------------------------
  82
  83 // Construct a menu with optional title (then use append)
  84 wxMenu::wxMenu(const wxString& title, const wxFunction func)
  85       : m_title(title)
  86 {
  87     m_parent = NULL;
  88     m_eventHandler = this;
  89     m_pInvokingWindow = NULL;
  90     m_doBreak = FALSE ;
  91     m_noItems = 0;
  92     m_menuBar = NULL;
  93     m_hMenu = (WXHMENU) CreatePopupMenu();
  94     m_savehMenu = 0 ;
  95     m_topLevelMenu = this;
  96     m_clientData = (void*) NULL;
  97
  98     if ( !!m_title )
  99     {
 100         Append(idMenuTitle, m_title) ;
 101         AppendSeparator() ;
 102     }
 103
 104 #if WXWIN_COMPATIBILITY
 105     Callback(func);
 106 #endif
 107 }
 108
 109 // The wxWindow destructor will take care of deleting the submenus.
 110 wxMenu::~wxMenu()
 111 {
 112     // free Windows resources
 113     if ( m_hMenu )
 114     {
 115         ::DestroyMenu((HMENU)m_hMenu);
 116         m_hMenu = 0;
 117     }
 118
 119     // delete submenus
 120     wxNode *node = m_menuItems.First();
 121     while ( node )
 122     {
 123         wxMenuItem *item = (wxMenuItem *)node->Data();
 124
 125         // Delete child menus.
 126         // Beware: they must not be appended to children list!!!
 127         // (because order of delete is significant)
 128         if ( item->IsSubMenu() )
 129             item->DeleteSubMenu();
 130
 131         wxNode *next = node->Next();
 132         delete item;
 133         delete node;
 134         node = next;
 135     }
 136 }
 137
 138 void wxMenu::Break()
 139 {
 140     m_doBreak = TRUE;
 141 }
 142
 143 // function appends a new item or submenu to the menu
 144 void wxMenu::Append(wxMenuItem *pItem)
 145 {
 146     wxCHECK_RET( pItem != NULL, "can't append NULL item to the menu" );
 147
 148     // check for accelerators: they are given after '\t'
 149     wxString label = pItem->GetName();
 150     int posTab = label.Find('\t');
 151     if ( posTab != wxNOT_FOUND ) {
 152         // parse the accelerator string
 153         int keyCode = 0;
 154         int accelFlags = wxACCEL_NORMAL;
 155         wxString current;
 156         for ( size_t n = (size_t)posTab + 1; n < label.Len(); n++ ) {
 157             if ( (label[n] == '+') || (label[n] == '-') ) {
 158                 if ( current == _("ctrl") )
 159                     accelFlags |= wxACCEL_CTRL;
 160                 else if ( current == _("alt") )
 161                     accelFlags |= wxACCEL_ALT;
 162                 else if ( current == _("shift") )
 163                     accelFlags |= wxACCEL_SHIFT;
 164                 else {
 165                     wxLogDebug(_T("Unknown accel modifier: '%s'"),
 166                                current.c_str());
 167                 }
 168
 169                 current.Empty();
 170             }
 171             else {
 172                 current += wxTolower(label[n]);
 173             }
 174         }
 175
 176         if ( current.IsEmpty() ) {
 177             wxLogDebug(_T("No accel key found, accel string ignored."));
 178         }
 179         else {
 180             if ( current.Len() == 1 ) {
 181                 // it's a letter
 182                 keyCode = wxToupper(current[0U]);
 183             }
 184             else {
 185                 // it should be a function key
 186                 if ( current[0U] == 'f' && isdigit(current[1U]) &&
 187                      (current.Len() == 2 ||
 188                      (current.Len() == 3 && isdigit(current[2U]))) ) {
 189                     int n;
 190                     sscanf(current.c_str() + 1, "%d", &n);
 191
 192                     keyCode = VK_F1 + n - 1;
 193                 }
 194                 else {
 195                     wxLogDebug(_T("Unrecognized accel key '%s', accel "
 196                                   "string ignored."), current.c_str());
 197                 }
 198             }
 199         }
 200
 201         if ( keyCode ) {
 202             // do add an entry
 203             m_accelKeyCodes.Add(keyCode);
 204             m_accelFlags.Add(accelFlags);
 205             m_accelIds.Add(pItem->GetId());
 206         }
 207     }
 208
 209     UINT flags = 0;
 210
 211     // if "Break" has just been called, insert a menu break before this item
 212     // (and don't forget to reset the flag)
 213     if ( m_doBreak ) {
 214         flags |= MF_MENUBREAK;
 215         m_doBreak = FALSE;
 216     }
 217
 218     if ( pItem->IsSeparator() ) {
 219         flags |= MF_SEPARATOR;
 220     }
 221
 222     // id is the numeric id for normal menu items and HMENU for submenus as
 223     // required by ::AppendMenu() API
 224     UINT id;
 225     wxMenu *submenu = pItem->GetSubMenu();
 226     if ( submenu != NULL ) {
 227         wxASSERT( submenu->GetHMenu() != (WXHMENU) NULL );
 228
 229         id = (UINT)submenu->GetHMenu();
 230         submenu->m_topLevelMenu = m_topLevelMenu;
 231         submenu->m_parent       = this;
 232         submenu->m_savehMenu    = (WXHMENU)id;
 233         submenu->m_hMenu        = 0;
 234
 235         flags |= MF_POPUP;
 236     }
 237     else {
 238         id = pItem->GetId();
 239     }
 240
 241     LPCSTR pData;
 242
 243 #if wxUSE_OWNER_DRAWN
 244     if ( pItem->IsOwnerDrawn() ) {  // want to get {Measure|Draw}Item messages?
 245         // item draws itself, pass pointer to it in data parameter
 246         flags |= MF_OWNERDRAW;
 247         pData = (LPCSTR)pItem;
 248     }
 249     else
 250 #endif
 251     {
 252         // menu is just a normal string (passed in data parameter)
 253         flags |= MF_STRING;
 254         pData = label;
 255     }
 256
 257     if ( !::AppendMenu(GetHMENU(), flags, id, pData) )
 258     {
 259         wxLogLastError("AppendMenu");
 260     }
 261     else
 262     {
 263 #ifdef __WIN32__
 264         if ( id == idMenuTitle )
 265         {
 266             // visually select the menu title
 267             MENUITEMINFO mii;
 268             mii.cbSize = sizeof(mii);
 269             mii.fMask = MIIM_STATE;
 270             mii.fState = MFS_DEFAULT;
 271
 272             if ( !SetMenuItemInfo(GetHMENU(), (unsigned)id, FALSE, &mii) )
 273             {
 274                 wxLogLastError("SetMenuItemInfo");
 275             }
 276         }
 277 #endif // __WIN32__
 278
 279         m_menuItems.Append(pItem);
 280         m_noItems++;
 281     }
 282 }
 283
 284 void wxMenu::AppendSeparator()
 285 {
 286     Append(new wxMenuItem(this, ID_SEPARATOR));
 287 }
 288
 289 // Pullright item
 290 void wxMenu::Append(int id,
 291                     const wxString& label,
 292                     wxMenu *SubMenu,
 293                     const wxString& helpString)
 294 {
 295     Append(new wxMenuItem(this, id, label, helpString, FALSE, SubMenu));
 296 }
 297
 298 // Ordinary menu item
 299 void wxMenu::Append(int id,
 300                     const wxString& label,
 301                     const wxString& helpString,
 302                     bool checkable)
 303 {
 304     // 'checkable' parameter is useless for Windows.
 305     Append(new wxMenuItem(this, id, label, helpString, checkable));
 306 }
 307
 308 // delete item by id
 309 void wxMenu::Delete(int id)
 310 {
 311     wxMenuItem *item = NULL;
 312     int pos;
 313     wxNode *node;
 314     for (pos = 0, node = m_menuItems.First(); node; node = node->Next(), pos++)
 315     {
 316         item = (wxMenuItem *)node->Data();
 317         if ( item->GetId() == id )
 318             break;
 319     }
 320
 321     wxCHECK_RET( node, "wxMenu::Delete(): item doesn't exist" );
 322
 323     HMENU menu = GetHMENU();
 324
 325     wxMenu *pSubMenu = item->GetSubMenu();
 326     if ( pSubMenu != NULL ) {
 327         RemoveMenu(menu, (UINT)pos, MF_BYPOSITION);
 328         pSubMenu->m_hMenu = pSubMenu->m_savehMenu;
 329         pSubMenu->m_savehMenu = 0;
 330         pSubMenu->m_parent = NULL;
 331         //     RemoveChild(item->subMenu);
 332         pSubMenu->m_topLevelMenu = NULL;
 333         // TODO: Why isn't subMenu deleted here???
 334         // Will put this in for now. Assuming this is supposed
 335         // to delete the menu, not just remove it.
 336         item->DeleteSubMenu();
 337     }
 338     else {
 339         DeleteMenu(menu, (UINT)pos, MF_BYPOSITION);
 340     }
 341
 342     m_menuItems.DeleteNode(node);
 343     delete item;
 344 }
 345
 346 // ---------------------------------------------------------------------------
 347 // accelerator helpers
 348 // ---------------------------------------------------------------------------
 349
 350 // create the wxAcceleratorEntries for our accels and put them into provided
 351 // array - return the number of accels we have
 352 size_t wxMenu::CopyAccels(wxAcceleratorEntry *accels) const
 353 {
 354     size_t count = GetAccelCount();
 355     for ( size_t n = 0; n < count; n++ )
 356     {
 357         (*accels++).Set(m_accelFlags[n], m_accelKeyCodes[n], m_accelIds[n]);
 358     }
 359
 360     return count;
 361 }
 362
 363 // ---------------------------------------------------------------------------
 364 // wxMenu functions implemented in wxMenuItem
 365 // ---------------------------------------------------------------------------
 366
 367 void wxMenu::Enable(int id, bool Flag)
 368 {
 369     wxMenuItem *item = FindItemForId(id);
 370     wxCHECK_RET( item != NULL, "can't enable non-existing menu item" );
 371
 372     item->Enable(Flag);
 373 }
 374
 375 bool wxMenu::IsEnabled(int id) const
 376 {
 377     wxMenuItem *item = FindItemForId(id);
 378     wxCHECK_MSG( item != NULL, FALSE, "invalid item id" );
 379
 380     return item->IsEnabled();
 381 }
 382
 383 void wxMenu::Check(int id, bool Flag)
 384 {
 385     wxMenuItem *item = FindItemForId(id);
 386     wxCHECK_RET( item != NULL, "can't get status of non-existing menu item" );
 387
 388     item->Check(Flag);
 389 }
 390
 391 bool wxMenu::IsChecked(int id) const
 392 {
 393     wxMenuItem *item = FindItemForId(id);
 394     wxCHECK_MSG( item != NULL, FALSE, "invalid item id" );
 395
 396     return item->IsChecked();
 397 }
 398
 399 void wxMenu::SetLabel(int id, const wxString& label)
 400 {
 401     wxMenuItem *item = FindItemForId(id) ;
 402     wxCHECK_RET( item, "wxMenu::SetLabel: no such item" );
 403
 404     item->SetName(label);
 405 }
 406
 407 wxString wxMenu::GetLabel(int id) const
 408 {
 409     wxString label;
 410     wxMenuItem *pItem = FindItemForId(id) ;
 411     if (pItem)
 412         label = pItem->GetName() ;
 413     else
 414         wxFAIL_MSG("wxMenu::GetLabel: item doesn't exist");
 415
 416     return label;
 417 }
 418
 419 void wxMenu::SetHelpString(int itemId, const wxString& helpString)
 420 {
 421     wxMenuItem *item = FindItemForId (itemId);
 422     if (item)
 423         item->SetHelp(helpString);
 424     else
 425         wxFAIL_MSG("wxMenu::SetHelpString: item doesn't exist");
 426 }
 427
 428 wxString wxMenu::GetHelpString (int itemId) const
 429 {
 430     wxString help;
 431     wxMenuItem *item = FindItemForId (itemId);
 432     if (item)
 433         help = item->GetHelp();
 434     else
 435         wxFAIL_MSG("wxMenu::GetHelpString: item doesn't exist");
 436
 437     return help;
 438 }
 439
 440 // ---------------------------------------------------------------------------
 441 // wxMenu title
 442 // ---------------------------------------------------------------------------
 443
 444 void wxMenu::SetTitle(const wxString& label)
 445 {
 446     bool hasNoTitle = m_title.IsEmpty();
 447     m_title = label;
 448
 449     HMENU hMenu = GetHMENU();
 450
 451     if ( hasNoTitle )
 452     {
 453         if ( !label.IsEmpty() )
 454         {
 455             if ( !InsertMenu(hMenu, 0u, MF_BYPOSITION | MF_STRING,
 456                              (unsigned)idMenuTitle, m_title) ||
 457                  !InsertMenu(hMenu, 1u, MF_BYPOSITION, (unsigned)-1, NULL) )
 458             {
 459                 wxLogLastError("InsertMenu");
 460             }
 461         }
 462     }
 463     else
 464     {
 465         if ( label.IsEmpty() )
 466         {
 467             // remove the title and the separator after it
 468             if ( !RemoveMenu(hMenu, 0, MF_BYPOSITION) ||
 469                  !RemoveMenu(hMenu, 0, MF_BYPOSITION) )
 470             {
 471                 wxLogLastError("RemoveMenu");
 472             }
 473         }
 474         else
 475         {
 476             // modify the title
 477             if ( !ModifyMenu(hMenu, 0u,
 478                         MF_BYPOSITION | MF_STRING,
 479                         (unsigned)idMenuTitle, m_title) )
 480             {
 481                 wxLogLastError("ModifyMenu");
 482             }
 483         }
 484     }
 485
 486 #ifdef __WIN32__
 487     // put the title string in bold face
 488     if ( !m_title.IsEmpty() )
 489     {
 490         MENUITEMINFO mii;
 491         mii.cbSize = sizeof(mii);
 492         mii.fMask = MIIM_STATE;
 493         mii.fState = MFS_DEFAULT;
 494
 495         if ( !SetMenuItemInfo(hMenu, (unsigned)idMenuTitle, FALSE, &mii) )
 496         {
 497             wxLogLastError("SetMenuItemInfo");
 498         }
 499     }
 500 #endif
 501 }
 502
 503 const wxString wxMenu::GetTitle() const
 504 {
 505     return m_title;
 506 }
 507
 508 // ---------------------------------------------------------------------------
 509 // event processing
 510 // ---------------------------------------------------------------------------
 511
 512 bool wxMenu::MSWCommand(WXUINT WXUNUSED(param), WXWORD id)
 513 {
 514     // ignore commands from the menu title
 515
 516     // NB: VC++ generates wrong assembler for `if ( id != idMenuTitle )'!!
 517     if ( id != (WXWORD)idMenuTitle )
 518     {
 519         wxCommandEvent event(wxEVT_COMMAND_MENU_SELECTED);
 520         event.SetEventObject( this );
 521         event.SetId( id );
 522         event.SetInt( id );
 523         ProcessCommand(event);
 524     }
 525
 526     return TRUE;
 527 }
 528
 529 bool wxMenu::ProcessCommand(wxCommandEvent & event)
 530 {
 531     bool processed = FALSE;
 532
 533 #if WXWIN_COMPATIBILITY
 534     // Try a callback
 535     if (m_callback)
 536     {
 537         (void)(*(m_callback))(*this, event);
 538         processed = TRUE;
 539     }
 540 #endif // WXWIN_COMPATIBILITY
 541
 542     // Try the menu's event handler
 543     if ( !processed && GetEventHandler())
 544     {
 545         processed = GetEventHandler()->ProcessEvent(event);
 546     }
 547
 548     // Try the window the menu was popped up from (and up through the
 549     // hierarchy)
 550     wxWindow *win = GetInvokingWindow();
 551     if ( !processed && win )
 552         processed = win->GetEventHandler()->ProcessEvent(event);
 553
 554     return processed;
 555 }
 556
 557 // ---------------------------------------------------------------------------
 558 // Item search
 559 // ---------------------------------------------------------------------------
 560
 561 // Finds the item id matching the given string, -1 if not found.
 562 int wxMenu::FindItem (const wxString& itemString) const
 563 {
 564     wxString itemLabel = wxStripMenuCodes(itemString);
 565     for ( wxNode *node = m_menuItems.First(); node; node = node->Next() )
 566     {
 567         wxMenuItem *item = (wxMenuItem *)node->Data();
 568         if ( item->IsSubMenu() )
 569         {
 570             int ans = item->GetSubMenu()->FindItem(itemString);
 571             if ( ans != wxNOT_FOUND )
 572                 return ans;
 573         }
 574         else if ( !item->IsSeparator() )
 575         {
 576             wxString label = wxStripMenuCodes(item->GetName());
 577             if ( itemLabel == label )
 578                 return item->GetId();
 579         }
 580     }
 581
 582     return wxNOT_FOUND;
 583 }
 584
 585 wxMenuItem *wxMenu::FindItemForId(int itemId, wxMenu ** itemMenu) const
 586 {
 587     if ( itemMenu )
 588         *itemMenu = NULL;
 589
 590     wxMenuItem *item = NULL;
 591     for ( wxNode *node = m_menuItems.First(); node && !item; node = node->Next() )
 592     {
 593         item = (wxMenuItem *)node->Data();
 594
 595         if ( item->GetId() == itemId )
 596         {
 597             if (itemMenu)
 598                 *itemMenu = (wxMenu *)this;
 599         }
 600         else if ( item->IsSubMenu() )
 601         {
 602             item = item->GetSubMenu()->FindItemForId(itemId, itemMenu);
 603         }
 604         else
 605         {
 606             // don't exit the loop
 607             item = NULL;
 608         }
 609     }
 610
 611     return item;
 612 }
 613
 614 // ---------------------------------------------------------------------------
 615 // other
 616 // ---------------------------------------------------------------------------
 617
 618 bool wxWindow::PopupMenu(wxMenu *menu, int x, int y)
 619 {
 620     menu->SetInvokingWindow(this);
 621     menu->UpdateUI();
 622
 623     HWND hWnd = (HWND) GetHWND();
 624     HMENU hMenu = (HMENU)menu->GetHMenu();
 625     POINT point;
 626     point.x = x;
 627     point.y = y;
 628     ::ClientToScreen(hWnd, &point);
 629     wxCurrentPopupMenu = menu;
 630     ::TrackPopupMenu(hMenu, TPM_RIGHTBUTTON, point.x, point.y, 0, hWnd, NULL);
 631     wxYield();
 632     wxCurrentPopupMenu = NULL;
 633
 634     menu->SetInvokingWindow(NULL);
 635
 636     return TRUE;
 637 }
 638
 639 void wxMenu::Attach(wxMenuBar *menubar)
 640 {
 641     // menu can be in at most one menubar because otherwise they would both
 642     // delete the menu pointer
 643     wxASSERT_MSG( !m_menuBar, "menu belongs to 2 menubars, expect a crash" );
 644
 645     m_menuBar = menubar;
 646     m_savehMenu = m_hMenu;
 647     m_hMenu = 0;
 648 }
 649
 650 void wxMenu::Detach()
 651 {
 652     wxASSERT_MSG( m_menuBar, "can't detach menu if it's not attached" );
 653
 654     m_hMenu = m_savehMenu;
 655     m_savehMenu = 0;
 656 }
 657
 658 // ---------------------------------------------------------------------------
 659 // Menu Bar
 660 // ---------------------------------------------------------------------------
 661
 662 void wxMenuBar::Init()
 663 {
 664     m_eventHandler = this;
 665     m_menuCount = 0;
 666     m_menus = NULL;
 667     m_titles = NULL;
 668     m_menuBarFrame = NULL;
 669     m_hMenu = 0;
 670 }
 671
 672 wxMenuBar::wxMenuBar()
 673 {
 674     Init();
 675 }
 676
 677 wxMenuBar::wxMenuBar( long WXUNUSED(style) )
 678 {
 679     Init();
 680 }
 681
 682 wxMenuBar::wxMenuBar(int count, wxMenu *menus[], const wxString titles[])
 683 {
 684     Init();
 685
 686     m_menuCount = count;
 687     m_menus = menus;
 688     m_titles = new wxString[count];
 689
 690     int i;
 691     for ( i = 0; i < count; i++ )
 692         m_titles[i] = titles[i];
 693
 694     for ( i = 0; i < count; i++ )
 695         m_menus[i]->Attach(this);
 696 }
 697
 698 wxMenuBar::~wxMenuBar()
 699 {
 700     for ( int i = 0; i < m_menuCount; i++ )
 701     {
 702         delete m_menus[i];
 703     }
 704
 705     delete[] m_menus;
 706     delete[] m_titles;
 707 }
 708
 709 // ---------------------------------------------------------------------------
 710 // wxMenuBar helpers
 711 // ---------------------------------------------------------------------------
 712
 713 void wxMenuBar::Refresh()
 714 {
 715     wxCHECK_RET( m_menuBarFrame, "can't refresh a menubar withotu a frame" );
 716
 717     DrawMenuBar((HWND)m_menuBarFrame->GetHWND()) ;
 718 }
 719
 720 WXHMENU wxMenuBar::Create()
 721 {
 722     wxCHECK_MSG( !m_hMenu, TRUE, "menubar already created" );
 723
 724     m_hMenu = (WXHMENU)::CreateMenu();
 725
 726     if ( !m_hMenu )
 727     {
 728         wxLogLastError("CreateMenu");
 729     }
 730     else
 731     {
 732         for ( int i = 0; i < m_menuCount; i++ )
 733         {
 734             if ( !::AppendMenu((HMENU)m_hMenu, MF_POPUP | MF_STRING,
 735                                (UINT)m_menus[i]->GetHMenu(),
 736                                m_titles[i]) )
 737             {
 738                 wxLogLastError("AppendMenu");
 739             }
 740         }
 741     }
 742
 743     return m_hMenu;
 744 }
 745
 746 // ---------------------------------------------------------------------------
 747 // wxMenuBar functions forwarded to wxMenuItem
 748 // ---------------------------------------------------------------------------
 749
 750 // Must only be used AFTER menu has been attached to frame,
 751 // otherwise use individual menus to enable/disable items
 752 void wxMenuBar::Enable(int id, bool enable)
 753 {
 754     wxMenu *itemMenu = NULL;
 755     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 756
 757     wxCHECK_RET( item, "attempt to enable an item which doesn't exist" );
 758
 759     item->Enable(enable);
 760 }
 761
 762 void wxMenuBar::EnableTop(int pos, bool enable)
 763 {
 764     int flag = enable ? MF_ENABLED : MF_GRAYED;;
 765
 766     EnableMenuItem((HMENU)m_hMenu, pos, MF_BYPOSITION | flag);
 767 }
 768
 769 // Must only be used AFTER menu has been attached to frame,
 770 // otherwise use individual menus
 771 void wxMenuBar::Check(int id, bool check)
 772 {
 773     wxMenu *itemMenu = NULL;
 774     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 775
 776     wxCHECK_RET( item, "attempt to check an item which doesn't exist" );
 777     wxCHECK_RET( item->IsCheckable(), "attempt to check an uncheckable item" );
 778
 779     item->Check(check);
 780 }
 781
 782 bool wxMenuBar::IsChecked(int id) const
 783 {
 784     wxMenu *itemMenu = NULL;
 785     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 786
 787     wxCHECK_MSG( item, FALSE, "wxMenuBar::IsChecked(): no such item" );
 788
 789     int flag = ::GetMenuState(GetHMenuOf(itemMenu), id, MF_BYCOMMAND);
 790
 791     return (flag & MF_CHECKED) != 0;
 792 }
 793
 794 bool wxMenuBar::IsEnabled(int id) const
 795 {
 796     wxMenu *itemMenu = NULL;
 797     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 798
 799     wxCHECK_MSG( item, FALSE, "wxMenuBar::IsEnabled(): no such item" );
 800
 801     int flag = ::GetMenuState(GetHMenuOf(itemMenu), id, MF_BYCOMMAND) ;
 802
 803     return (flag & MF_ENABLED) != 0;
 804 }
 805
 806 void wxMenuBar::SetLabel(int id, const wxString& label)
 807 {
 808     wxMenu *itemMenu = NULL;
 809     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 810
 811     wxCHECK_RET( item, "wxMenuBar::SetLabel(): no such item" );
 812
 813     item->SetName(label);
 814 }
 815
 816 wxString wxMenuBar::GetLabel(int id) const
 817 {
 818     wxMenu *itemMenu = NULL;
 819     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 820
 821     wxCHECK_MSG( item, "", "wxMenuBar::GetLabel(): no such item" );
 822
 823     return item->GetName();
 824 }
 825
 826 void wxMenuBar::SetHelpString (int id, const wxString& helpString)
 827 {
 828     wxMenu *itemMenu = NULL;
 829     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 830
 831     wxCHECK_RET( item, "wxMenuBar::SetHelpString(): no such item" );
 832
 833     item->SetHelp(helpString);
 834 }
 835
 836 wxString wxMenuBar::GetHelpString (int id) const
 837 {
 838     wxMenu *itemMenu = NULL;
 839     wxMenuItem *item = FindItemForId(id, &itemMenu) ;
 840
 841     wxCHECK_MSG( item, "", "wxMenuBar::GetHelpString(): no such item" );
 842
 843     return item->GetHelp();
 844 }
 845
 846 // ---------------------------------------------------------------------------
 847 // wxMenuBar functions to work with the top level submenus
 848 // ---------------------------------------------------------------------------
 849
 850 // NB: we don't support owner drawn top level items for now, if we do these
 851 //     functions would have to be changed to use wxMenuItem as well
 852
 853 void wxMenuBar::SetLabelTop(int pos, const wxString& label)
 854 {
 855     UINT id;
 856     UINT flagsOld = ::GetMenuState((HMENU)m_hMenu, pos, MF_BYPOSITION);
 857     if ( flagsOld == 0xFFFFFFFF )
 858     {
 859         wxLogLastError("GetMenuState");
 860
 861         return;
 862     }
 863
 864     if ( flagsOld & MF_POPUP )
 865     {
 866         // HIBYTE contains the number of items in the submenu in this case
 867         flagsOld &= 0xff ;
 868         id = (UINT)::GetSubMenu((HMENU)m_hMenu, pos) ;
 869     }
 870     else
 871     {
 872         id = pos;
 873     }
 874
 875     if ( ::ModifyMenu(GetHMENU(), pos, MF_BYPOSITION | MF_STRING | flagsOld,
 876                       id, label) == 0xFFFFFFFF )
 877     {
 878         wxLogLastError("ModifyMenu");
 879     }
 880 }
 881
 882 wxString wxMenuBar::GetLabelTop(int pos) const
 883 {
 884     int len = ::GetMenuString((HMENU)m_hMenu, pos, NULL, 0, MF_BYCOMMAND);
 885
 886     len++;  // for the NUL character
 887     wxString label;
 888     ::GetMenuString(GetHMENU(), pos, label.GetWriteBuf(len), len, MF_BYCOMMAND);
 889     label.UngetWriteBuf();
 890
 891     return label;
 892 }
 893
 894 // ---------------------------------------------------------------------------
 895 // wxMenuBar notifications
 896 // ---------------------------------------------------------------------------
 897
 898 bool wxMenuBar::OnDelete(wxMenu *a_menu, int pos)
 899 {
 900     if ( !m_menuBarFrame )
 901         return TRUE;
 902
 903     if ( ::RemoveMenu((HMENU)m_hMenu, (UINT)pos, MF_BYPOSITION) )
 904     {
 905         // VZ: I'm not sure about what's going on here, so I leave an assert
 906         wxASSERT_MSG( m_menus[pos] == a_menu, "what is this parameter for??" );
 907
 908         a_menu->Detach();
 909
 910         if ( m_menuBarFrame )
 911             Refresh();
 912
 913         return TRUE;
 914     }
 915     else
 916     {
 917         wxLogLastError("RemoveMenu");
 918     }
 919
 920     return FALSE;
 921 }
 922
 923 bool wxMenuBar::OnAppend(wxMenu *a_menu, const char *title)
 924 {
 925     WXHMENU submenu = a_menu->GetHMenu();
 926     if ( !submenu )
 927         return FALSE;
 928
 929     if ( !m_menuBarFrame )
 930         return TRUE;
 931
 932     a_menu->Attach(this);
 933
 934     if ( !::AppendMenu(GetHMENU(), MF_POPUP | MF_STRING,
 935                        (UINT)submenu, title) )
 936     {
 937         wxLogLastError("AppendMenu");
 938     }
 939
 940     Refresh();
 941
 942     return TRUE;
 943 }
 944
 945 // ---------------------------------------------------------------------------
 946 // wxMenuBar construction
 947 // ---------------------------------------------------------------------------
 948
 949 void wxMenuBar::Append (wxMenu * menu, const wxString& title)
 950 {
 951     if (!OnAppend(menu, title))
 952         return;
 953
 954     m_menuCount ++;
 955     wxMenu **new_menus = new wxMenu *[m_menuCount];
 956     wxString *new_titles = new wxString[m_menuCount];
 957     int i;
 958
 959     for (i = 0; i < m_menuCount - 1; i++)
 960     {
 961         new_menus[i] = m_menus[i];
 962         m_menus[i] = NULL;
 963         new_titles[i] = m_titles[i];
 964         m_titles[i] = "";
 965     }
 966     if (m_menus)
 967     {
 968         delete[]m_menus;
 969         delete[]m_titles;
 970     }
 971     m_menus = new_menus;
 972     m_titles = new_titles;
 973
 974     m_menus[m_menuCount - 1] = (wxMenu *)menu;
 975     m_titles[m_menuCount - 1] = title;
 976
 977     menu->SetParent(this);
 978 }
 979
 980 void wxMenuBar::Delete(wxMenu * menu, int i)
 981 {
 982     int j;
 983     int ii = (int) i;
 984
 985     if (menu != 0) {
 986         for (ii = 0; ii < m_menuCount; ii++) {
 987             if (m_menus[ii] == menu)
 988                 break;
 989         }
 990         if (ii >= m_menuCount)
 991             return;
 992     } else {
 993         if (ii < 0 || ii >= m_menuCount)
 994             return;
 995         menu = m_menus[ii];
 996     }
 997
 998     if (!OnDelete(menu, ii))
 999         return;
1000
1001     menu->SetParent(NULL);
1002
1003     -- m_menuCount;
1004     for (j = ii; j < m_menuCount; j++) {
1005         m_menus[j] = m_menus[j + 1];
1006         m_titles[j] = m_titles[j + 1];
1007     }
1008 }
1009
1010 void wxMenuBar::Attach(wxFrame *frame)
1011 {
1012     wxASSERT_MSG( !m_menuBarFrame, _T("menubar already attached!") );
1013
1014     m_menuBarFrame = frame;
1015
1016     // create the accel table - we consider that the toolbar construction is
1017     // finished
1018     size_t nAccelCount = 0;
1019     int i;
1020     for ( i = 0; i < m_menuCount; i++ )
1021     {
1022         nAccelCount += m_menus[i]->GetAccelCount();
1023     }
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
1038 // ---------------------------------------------------------------------------
1039 // wxMenuBar searching for menu items
1040 // ---------------------------------------------------------------------------
1041
1042 // Find the itemString in menuString, and return the item id or wxNOT_FOUND
1043 int wxMenuBar::FindMenuItem(const wxString& menuString,
1044                             const wxString& itemString) const
1045 {
1046     wxString menuLabel = wxStripMenuCodes(menuString);
1047     for ( int i = 0; i < m_menuCount; i++ )
1048     {
1049         wxString title = wxStripMenuCodes(m_titles[i]);
1050         if ( menuString == title )
1051             return m_menus[i]->FindItem(itemString);
1052     }
1053
1054     return wxNOT_FOUND;
1055 }
1056
1057 wxMenuItem *wxMenuBar::FindItemForId (int id, wxMenu **itemMenu) const
1058 {
1059     if ( itemMenu )
1060         *itemMenu = NULL;
1061
1062     wxMenuItem *item = NULL;
1063     for ( int i = 0; !item && (i < m_menuCount); i++ )
1064     {
1065         item = m_menus[i]->FindItemForId(id, itemMenu);
1066     }
1067
1068     return item;
1069 }
1070
1071
1072 // ----------------------------------------------------------------------------
1073 // helper functions
1074 // ----------------------------------------------------------------------------
1075
1076 wxWindow *wxMenu::GetWindow() const
1077 {
1078     if ( m_pInvokingWindow != NULL )
1079         return m_pInvokingWindow;
1080     else if ( m_menuBar != NULL)
1081         return m_menuBar->GetFrame();
1082
1083     return NULL;
1084 }
1085
1086 WXHMENU wxMenu::GetHMenu() const
1087 {
1088     if ( m_hMenu != 0 )
1089         return m_hMenu;
1090     else if ( m_savehMenu != 0 )
1091         return m_savehMenu;
1092
1093     wxFAIL_MSG("wxMenu without HMENU");
1094
1095     return 0;
1096 }
1097
1098 // Update a menu and all submenus recursively. source is the object that has
1099 // the update event handlers defined for it. If NULL, the menu or associated
1100 // window will be used.
1101 void wxMenu::UpdateUI(wxEvtHandler* source)
1102 {
1103     if (!source && GetInvokingWindow())
1104         source = GetInvokingWindow()->GetEventHandler();
1105     if (!source)
1106         source = GetEventHandler();
1107     if (!source)
1108         source = this;
1109
1110     wxNode* node = GetItems().First();
1111     while (node)
1112     {
1113         wxMenuItem* item = (wxMenuItem*) node->Data();
1114         if ( !item->IsSeparator() )
1115         {
1116             wxWindowID id = item->GetId();
1117             wxUpdateUIEvent event(id);
1118             event.SetEventObject( source );
1119
1120             if (source->ProcessEvent(event))
1121             {
1122                 if (event.GetSetText())
1123                     SetLabel(id, event.GetText());
1124                 if (event.GetSetChecked())
1125                     Check(id, event.GetChecked());
1126                 if (event.GetSetEnabled())
1127                     Enable(id, event.GetEnabled());
1128             }
1129
1130             if (item->GetSubMenu())
1131                 item->GetSubMenu()->UpdateUI(source);
1132         }
1133         node = node->Next();
1134     }
1135 }