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
   9 // Licence:     wxWindows licence
  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 #if wxUSE_MENUS
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/frame.h"
  35     #include "wx/menu.h"
  36     #include "wx/utils.h"
  37     #include "wx/intl.h"
  38     #include "wx/log.h"
  39 #endif
  40
  41 #if wxUSE_OWNER_DRAWN
  42     #include "wx/ownerdrw.h"
  43 #endif
  44
  45 #include "wx/msw/private.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 // private functions
  65 // ----------------------------------------------------------------------------
  66
  67 // make the given menu item default
  68 static void SetDefaultMenuItem(HMENU hmenu, UINT id)
  69 {
  70     MENUITEMINFO mii;
  71     wxZeroMemory(mii);
  72     mii.cbSize = sizeof(MENUITEMINFO);
  73     mii.fMask = MIIM_STATE;
  74     mii.fState = MFS_DEFAULT;
  75
  76     if ( !::SetMenuItemInfo(hmenu, id, FALSE, &mii) )
  77     {
  78         wxLogLastError(wxT("SetMenuItemInfo"));
  79     }
  80 }
  81
  82 // ============================================================================
  83 // implementation
  84 // ============================================================================
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxMenu, wxEvtHandler)
  87 IMPLEMENT_DYNAMIC_CLASS(wxMenuBar, wxWindow)
  88
  89 // ---------------------------------------------------------------------------
  90 // wxMenu construction, adding and removing menu items
  91 // ---------------------------------------------------------------------------
  92
  93 // Construct a menu with optional title (then use append)
  94 void wxMenu::Init()
  95 {
  96     m_doBreak = FALSE;
  97     m_startRadioGroup = -1;
  98
  99     // create the menu
 100     m_hMenu = (WXHMENU)CreatePopupMenu();
 101     if ( !m_hMenu )
 102     {
 103         wxLogLastError(wxT("CreatePopupMenu"));
 104     }
 105
 106     // if we have a title, insert it in the beginning of the menu
 107     if ( !!m_title )
 108     {
 109         Append(idMenuTitle, m_title);
 110         AppendSeparator();
 111     }
 112 }
 113
 114 // The wxWindow destructor will take care of deleting the submenus.
 115 wxMenu::~wxMenu()
 116 {
 117     // we should free Windows resources only if Windows doesn't do it for us
 118     // which happens if we're attached to a menubar or a submenu of another
 119     // menu
 120     if ( !IsAttached() && !GetParent() )
 121     {
 122         if ( !::DestroyMenu(GetHmenu()) )
 123         {
 124             wxLogLastError(wxT("DestroyMenu"));
 125         }
 126     }
 127
 128 #if wxUSE_ACCEL
 129     // delete accels
 130     WX_CLEAR_ARRAY(m_accels);
 131 #endif // wxUSE_ACCEL
 132 }
 133
 134 void wxMenu::Break()
 135 {
 136     // this will take effect during the next call to Append()
 137     m_doBreak = TRUE;
 138 }
 139
 140 void wxMenu::Attach(wxMenuBarBase *menubar)
 141 {
 142     wxMenuBase::Attach(menubar);
 143
 144     EndRadioGroup();
 145 }
 146
 147 #if wxUSE_ACCEL
 148
 149 int wxMenu::FindAccel(int id) const
 150 {
 151     size_t n, count = m_accels.GetCount();
 152     for ( n = 0; n < count; n++ )
 153     {
 154         if ( m_accels[n]->m_command == id )
 155             return n;
 156     }
 157
 158     return wxNOT_FOUND;
 159 }
 160
 161 void wxMenu::UpdateAccel(wxMenuItem *item)
 162 {
 163     if ( item->IsSubMenu() )
 164     {
 165         wxMenu *submenu = item->GetSubMenu();
 166         wxMenuItemList::compatibility_iterator node = submenu->GetMenuItems().GetFirst();
 167         while ( node )
 168         {
 169             UpdateAccel(node->GetData());
 170
 171             node = node->GetNext();
 172         }
 173     }
 174     else if ( !item->IsSeparator() )
 175     {
 176         // find the (new) accel for this item
 177         wxAcceleratorEntry *accel = wxGetAccelFromString(item->GetText());
 178         if ( accel )
 179             accel->m_command = item->GetId();
 180
 181         // find the old one
 182         int n = FindAccel(item->GetId());
 183         if ( n == wxNOT_FOUND )
 184         {
 185             // no old, add new if any
 186             if ( accel )
 187                 m_accels.Add(accel);
 188             else
 189                 return;     // skipping RebuildAccelTable() below
 190         }
 191         else
 192         {
 193             // replace old with new or just remove the old one if no new
 194             delete m_accels[n];
 195             if ( accel )
 196                 m_accels[n] = accel;
 197             else
 198                 m_accels.RemoveAt(n);
 199         }
 200
 201         if ( IsAttached() )
 202         {
 203             m_menuBar->RebuildAccelTable();
 204         }
 205     }
 206     //else: it is a separator, they can't have accels, nothing to do
 207 }
 208
 209 #endif // wxUSE_ACCEL
 210
 211 // append a new item or submenu to the menu
 212 bool wxMenu::DoInsertOrAppend(wxMenuItem *pItem, size_t pos)
 213 {
 214 #if wxUSE_ACCEL
 215     UpdateAccel(pItem);
 216 #endif // wxUSE_ACCEL
 217
 218     UINT flags = 0;
 219
 220     // if "Break" has just been called, insert a menu break before this item
 221     // (and don't forget to reset the flag)
 222     if ( m_doBreak ) {
 223         flags |= MF_MENUBREAK;
 224         m_doBreak = FALSE;
 225     }
 226
 227     if ( pItem->IsSeparator() ) {
 228         flags |= MF_SEPARATOR;
 229     }
 230
 231     // id is the numeric id for normal menu items and HMENU for submenus as
 232     // required by ::AppendMenu() API
 233     UINT id;
 234     wxMenu *submenu = pItem->GetSubMenu();
 235     if ( submenu != NULL ) {
 236         wxASSERT_MSG( submenu->GetHMenu(), wxT("invalid submenu") );
 237
 238         submenu->SetParent(this);
 239
 240         id = (UINT)submenu->GetHMenu();
 241
 242         flags |= MF_POPUP;
 243     }
 244     else {
 245         id = pItem->GetId();
 246     }
 247
 248     LPCTSTR pData;
 249
 250 #if wxUSE_OWNER_DRAWN
 251     if ( pItem->IsOwnerDrawn() ) {  // want to get {Measure|Draw}Item messages?
 252         // item draws itself, pass pointer to it in data parameter
 253         flags |= MF_OWNERDRAW;
 254         pData = (LPCTSTR)pItem;
 255     }
 256     else
 257 #endif
 258     {
 259         // menu is just a normal string (passed in data parameter)
 260         flags |= MF_STRING;
 261
 262         pData = (wxChar*)pItem->GetText().c_str();
 263     }
 264
 265     BOOL ok;
 266     if ( pos == (size_t)-1 )
 267     {
 268         ok = ::AppendMenu(GetHmenu(), flags, id, pData);
 269     }
 270     else
 271     {
 272         ok = ::InsertMenu(GetHmenu(), pos, flags | MF_BYPOSITION, id, pData);
 273     }
 274
 275     if ( !ok )
 276     {
 277         wxLogLastError(wxT("Insert or AppendMenu"));
 278
 279         return FALSE;
 280     }
 281
 282     // if we just appended the title, highlight it
 283 #ifdef __WIN32__
 284     if ( (int)id == idMenuTitle )
 285     {
 286         // visually select the menu title
 287         SetDefaultMenuItem(GetHmenu(), id);
 288     }
 289 #endif // __WIN32__
 290
 291     // if we're already attached to the menubar, we must update it
 292     if ( IsAttached() && m_menuBar->IsAttached() )
 293     {
 294         m_menuBar->Refresh();
 295     }
 296
 297     return TRUE;
 298 }
 299
 300 void wxMenu::EndRadioGroup()
 301 {
 302     // we're not inside a radio group any longer
 303     m_startRadioGroup = -1;
 304 }
 305
 306 bool wxMenu::DoAppend(wxMenuItem *item)
 307 {
 308     wxCHECK_MSG( item, FALSE, _T("NULL item in wxMenu::DoAppend") );
 309
 310     bool check = FALSE;
 311
 312     if ( item->GetKind() == wxITEM_RADIO )
 313     {
 314         int count = GetMenuItemCount();
 315
 316         if ( m_startRadioGroup == -1 )
 317         {
 318             // start a new radio group
 319             m_startRadioGroup = count;
 320
 321             // for now it has just one element
 322             item->SetAsRadioGroupStart();
 323             item->SetRadioGroupEnd(m_startRadioGroup);
 324
 325             // ensure that we have a checked item in the radio group
 326             check = TRUE;
 327         }
 328         else // extend the current radio group
 329         {
 330             // we need to update its end item
 331             item->SetRadioGroupStart(m_startRadioGroup);
 332             wxMenuItemList::compatibility_iterator node = GetMenuItems().Item(m_startRadioGroup);
 333
 334             if ( node )
 335             {
 336                 node->GetData()->SetRadioGroupEnd(count);
 337             }
 338             else
 339             {
 340                 wxFAIL_MSG( _T("where is the radio group start item?") );
 341             }
 342         }
 343     }
 344     else // not a radio item
 345     {
 346         EndRadioGroup();
 347     }
 348
 349     if ( !wxMenuBase::DoAppend(item) || !DoInsertOrAppend(item) )
 350     {
 351         return FALSE;
 352     }
 353
 354     if ( check )
 355     {
 356         // check the item initially
 357         item->Check(TRUE);
 358     }
 359
 360     return TRUE;
 361 }
 362
 363 bool wxMenu::DoInsert(size_t pos, wxMenuItem *item)
 364 {
 365     return wxMenuBase::DoInsert(pos, item) && DoInsertOrAppend(item, pos);
 366 }
 367
 368 wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
 369 {
 370     // we need to find the items position in the child list
 371     size_t pos;
 372     wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();
 373     for ( pos = 0; node; pos++ )
 374     {
 375         if ( node->GetData() == item )
 376             break;
 377
 378         node = node->GetNext();
 379     }
 380
 381     // DoRemove() (unlike Remove) can only be called for existing item!
 382     wxCHECK_MSG( node, NULL, wxT("bug in wxMenu::Remove logic") );
 383
 384 #if wxUSE_ACCEL
 385     // remove the corresponding accel from the accel table
 386     int n = FindAccel(item->GetId());
 387     if ( n != wxNOT_FOUND )
 388     {
 389         delete m_accels[n];
 390
 391         m_accels.RemoveAt(n);
 392     }
 393     //else: this item doesn't have an accel, nothing to do
 394 #endif // wxUSE_ACCEL
 395
 396     // remove the item from the menu
 397     if ( !::RemoveMenu(GetHmenu(), (UINT)pos, MF_BYPOSITION) )
 398     {
 399         wxLogLastError(wxT("RemoveMenu"));
 400     }
 401
 402     if ( IsAttached() && m_menuBar->IsAttached() )
 403     {
 404         // otherwise, the chane won't be visible
 405         m_menuBar->Refresh();
 406     }
 407
 408     // and from internal data structures
 409     return wxMenuBase::DoRemove(item);
 410 }
 411
 412 // ---------------------------------------------------------------------------
 413 // accelerator helpers
 414 // ---------------------------------------------------------------------------
 415
 416 #if wxUSE_ACCEL
 417
 418 // create the wxAcceleratorEntries for our accels and put them into provided
 419 // array - return the number of accels we have
 420 size_t wxMenu::CopyAccels(wxAcceleratorEntry *accels) const
 421 {
 422     size_t count = GetAccelCount();
 423     for ( size_t n = 0; n < count; n++ )
 424     {
 425         *accels++ = *m_accels[n];
 426     }
 427
 428     return count;
 429 }
 430
 431 #endif // wxUSE_ACCEL
 432
 433 // ---------------------------------------------------------------------------
 434 // set wxMenu title
 435 // ---------------------------------------------------------------------------
 436
 437 void wxMenu::SetTitle(const wxString& label)
 438 {
 439     bool hasNoTitle = m_title.IsEmpty();
 440     m_title = label;
 441
 442     HMENU hMenu = GetHmenu();
 443
 444     if ( hasNoTitle )
 445     {
 446         if ( !label.IsEmpty() )
 447         {
 448             if ( !::InsertMenu(hMenu, 0u, MF_BYPOSITION | MF_STRING,
 449                                (unsigned)idMenuTitle, m_title) ||
 450                  !::InsertMenu(hMenu, 1u, MF_BYPOSITION, (unsigned)-1, NULL) )
 451             {
 452                 wxLogLastError(wxT("InsertMenu"));
 453             }
 454         }
 455     }
 456     else
 457     {
 458         if ( label.IsEmpty() )
 459         {
 460             // remove the title and the separator after it
 461             if ( !RemoveMenu(hMenu, 0, MF_BYPOSITION) ||
 462                  !RemoveMenu(hMenu, 0, MF_BYPOSITION) )
 463             {
 464                 wxLogLastError(wxT("RemoveMenu"));
 465             }
 466         }
 467         else
 468         {
 469             // modify the title
 470             if ( !ModifyMenu(hMenu, 0u,
 471                              MF_BYPOSITION | MF_STRING,
 472                              (unsigned)idMenuTitle, m_title) )
 473             {
 474                 wxLogLastError(wxT("ModifyMenu"));
 475             }
 476         }
 477     }
 478
 479 #ifdef __WIN32__
 480     // put the title string in bold face
 481     if ( !m_title.IsEmpty() )
 482     {
 483         SetDefaultMenuItem(GetHmenu(), (UINT)idMenuTitle);
 484     }
 485 #endif // Win32
 486 }
 487
 488 // ---------------------------------------------------------------------------
 489 // event processing
 490 // ---------------------------------------------------------------------------
 491
 492 bool wxMenu::MSWCommand(WXUINT WXUNUSED(param), WXWORD id)
 493 {
 494     // ignore commands from the menu title
 495
 496     // NB: VC++ generates wrong assembler for `if ( id != idMenuTitle )'!!
 497     if ( id != (WXWORD)idMenuTitle )
 498     {
 499         // VZ: previosuly, the command int was set to id too which was quite
 500         //     useless anyhow (as it could be retrieved using GetId()) and
 501         //     uncompatible with wxGTK, so now we use the command int instead
 502         //     to pass the checked status
 503         SendEvent(id, ::GetMenuState(GetHmenu(), id, MF_BYCOMMAND) & MF_CHECKED);
 504     }
 505
 506     return TRUE;
 507 }
 508
 509 // ---------------------------------------------------------------------------
 510 // other
 511 // ---------------------------------------------------------------------------
 512
 513 wxWindow *wxMenu::GetWindow() const
 514 {
 515     if ( m_invokingWindow != NULL )
 516         return m_invokingWindow;
 517     else if ( m_menuBar != NULL)
 518         return m_menuBar->GetFrame();
 519
 520     return NULL;
 521 }
 522
 523 // ---------------------------------------------------------------------------
 524 // Menu Bar
 525 // ---------------------------------------------------------------------------
 526
 527 void wxMenuBar::Init()
 528 {
 529     m_eventHandler = this;
 530     m_hMenu = 0;
 531 }
 532
 533 wxMenuBar::wxMenuBar()
 534 {
 535     Init();
 536 }
 537
 538 wxMenuBar::wxMenuBar( long WXUNUSED(style) )
 539 {
 540     Init();
 541 }
 542
 543 wxMenuBar::wxMenuBar(int count, wxMenu *menus[], const wxString titles[])
 544 {
 545     Init();
 546
 547     m_titles.Alloc(count);
 548
 549     for ( int i = 0; i < count; i++ )
 550     {
 551         m_menus.Append(menus[i]);
 552         m_titles.Add(titles[i]);
 553
 554         menus[i]->Attach(this);
 555     }
 556 }
 557
 558 wxMenuBar::~wxMenuBar()
 559 {
 560     // we should free Windows resources only if Windows doesn't do it for us
 561     // which happens if we're attached to a frame
 562     if (m_hMenu && !IsAttached())
 563     {
 564         ::DestroyMenu((HMENU)m_hMenu);
 565         m_hMenu = (WXHMENU)NULL;
 566     }
 567 }
 568
 569 // ---------------------------------------------------------------------------
 570 // wxMenuBar helpers
 571 // ---------------------------------------------------------------------------
 572
 573 void wxMenuBar::Refresh()
 574 {
 575     wxCHECK_RET( IsAttached(), wxT("can't refresh unattached menubar") );
 576
 577     DrawMenuBar(GetHwndOf(GetFrame()));
 578 }
 579
 580 WXHMENU wxMenuBar::Create()
 581 {
 582     if ( m_hMenu != 0 )
 583         return m_hMenu;
 584
 585     m_hMenu = (WXHMENU)::CreateMenu();
 586
 587     if ( !m_hMenu )
 588     {
 589         wxLogLastError(wxT("CreateMenu"));
 590     }
 591     else
 592     {
 593         size_t count = GetMenuCount(), i;
 594         wxMenuList::iterator it;
 595         for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )
 596         {
 597             if ( !::AppendMenu((HMENU)m_hMenu, MF_POPUP | MF_STRING,
 598                                (UINT)(*it)->GetHMenu(),
 599                                m_titles[i]) )
 600             {
 601                 wxLogLastError(wxT("AppendMenu"));
 602             }
 603         }
 604     }
 605
 606     return m_hMenu;
 607 }
 608
 609 // ---------------------------------------------------------------------------
 610 // wxMenuBar functions to work with the top level submenus
 611 // ---------------------------------------------------------------------------
 612
 613 // NB: we don't support owner drawn top level items for now, if we do these
 614 //     functions would have to be changed to use wxMenuItem as well
 615
 616 void wxMenuBar::EnableTop(size_t pos, bool enable)
 617 {
 618     wxCHECK_RET( IsAttached(), wxT("doesn't work with unattached menubars") );
 619
 620     int flag = enable ? MF_ENABLED : MF_GRAYED;
 621
 622     EnableMenuItem((HMENU)m_hMenu, pos, MF_BYPOSITION | flag);
 623
 624     Refresh();
 625 }
 626
 627 void wxMenuBar::SetLabelTop(size_t pos, const wxString& label)
 628 {
 629     wxCHECK_RET( pos < GetMenuCount(), wxT("invalid menu index") );
 630
 631     m_titles[pos] = label;
 632
 633     if ( !IsAttached() )
 634     {
 635         return;
 636     }
 637     //else: have to modify the existing menu
 638
 639     UINT id;
 640     UINT flagsOld = ::GetMenuState((HMENU)m_hMenu, pos, MF_BYPOSITION);
 641     if ( flagsOld == 0xFFFFFFFF )
 642     {
 643         wxLogLastError(wxT("GetMenuState"));
 644
 645         return;
 646     }
 647
 648     if ( flagsOld & MF_POPUP )
 649     {
 650         // HIBYTE contains the number of items in the submenu in this case
 651         flagsOld &= 0xff;
 652         id = (UINT)::GetSubMenu((HMENU)m_hMenu, pos);
 653     }
 654     else
 655     {
 656         id = pos;
 657     }
 658
 659     if ( ::ModifyMenu(GetHmenu(), pos, MF_BYPOSITION | MF_STRING | flagsOld,
 660                       id, label) == (int)0xFFFFFFFF )
 661     {
 662         wxLogLastError(wxT("ModifyMenu"));
 663     }
 664
 665     Refresh();
 666 }
 667
 668 wxString wxMenuBar::GetLabelTop(size_t pos) const
 669 {
 670     wxCHECK_MSG( pos < GetMenuCount(), wxEmptyString,
 671                  wxT("invalid menu index in wxMenuBar::GetLabelTop") );
 672
 673     return m_titles[pos];
 674 }
 675
 676 // ---------------------------------------------------------------------------
 677 // wxMenuBar construction
 678 // ---------------------------------------------------------------------------
 679
 680 wxMenu *wxMenuBar::Replace(size_t pos, wxMenu *menu, const wxString& title)
 681 {
 682     wxMenu *menuOld = wxMenuBarBase::Replace(pos, menu, title);
 683     if ( !menuOld )
 684         return NULL;
 685
 686     m_titles[pos] = title;
 687
 688     if ( IsAttached() )
 689     {
 690         // can't use ModifyMenu() because it deletes the submenu it replaces
 691         if ( !::RemoveMenu(GetHmenu(), (UINT)pos, MF_BYPOSITION) )
 692         {
 693             wxLogLastError(wxT("RemoveMenu"));
 694         }
 695
 696         if ( !::InsertMenu(GetHmenu(), (UINT)pos,
 697                            MF_BYPOSITION | MF_POPUP | MF_STRING,
 698                            (UINT)GetHmenuOf(menu), title) )
 699         {
 700             wxLogLastError(wxT("InsertMenu"));
 701         }
 702
 703 #if wxUSE_ACCEL
 704         if ( menuOld->HasAccels() || menu->HasAccels() )
 705         {
 706             // need to rebuild accell table
 707             RebuildAccelTable();
 708         }
 709 #endif // wxUSE_ACCEL
 710
 711         Refresh();
 712     }
 713
 714     return menuOld;
 715 }
 716
 717 bool wxMenuBar::Insert(size_t pos, wxMenu *menu, const wxString& title)
 718 {
 719     if ( !wxMenuBarBase::Insert(pos, menu, title) )
 720         return FALSE;
 721
 722     m_titles.Insert(title, pos);
 723
 724     if ( IsAttached() )
 725     {
 726         if ( !::InsertMenu(GetHmenu(), pos,
 727                            MF_BYPOSITION | MF_POPUP | MF_STRING,
 728                            (UINT)GetHmenuOf(menu), title) )
 729         {
 730             wxLogLastError(wxT("InsertMenu"));
 731         }
 732
 733 #if wxUSE_ACCEL
 734         if ( menu->HasAccels() )
 735         {
 736             // need to rebuild accell table
 737             RebuildAccelTable();
 738         }
 739 #endif // wxUSE_ACCEL
 740
 741         Refresh();
 742     }
 743
 744     return TRUE;
 745 }
 746
 747 bool wxMenuBar::Append(wxMenu *menu, const wxString& title)
 748 {
 749     WXHMENU submenu = menu ? menu->GetHMenu() : 0;
 750     wxCHECK_MSG( submenu, FALSE, wxT("can't append invalid menu to menubar") );
 751
 752     if ( !wxMenuBarBase::Append(menu, title) )
 753         return FALSE;
 754
 755     m_titles.Add(title);
 756
 757     if ( IsAttached() )
 758     {
 759         if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,
 760                            (UINT)submenu, title) )
 761         {
 762             wxLogLastError(wxT("AppendMenu"));
 763         }
 764
 765 #if wxUSE_ACCEL
 766         if ( menu->HasAccels() )
 767         {
 768             // need to rebuild accell table
 769             RebuildAccelTable();
 770         }
 771 #endif // wxUSE_ACCEL
 772
 773         Refresh();
 774     }
 775
 776     return TRUE;
 777 }
 778
 779 wxMenu *wxMenuBar::Remove(size_t pos)
 780 {
 781     wxMenu *menu = wxMenuBarBase::Remove(pos);
 782     if ( !menu )
 783         return NULL;
 784
 785     if ( IsAttached() )
 786     {
 787         if ( !::RemoveMenu(GetHmenu(), (UINT)pos, MF_BYPOSITION) )
 788         {
 789             wxLogLastError(wxT("RemoveMenu"));
 790         }
 791
 792 #if wxUSE_ACCEL
 793         if ( menu->HasAccels() )
 794         {
 795             // need to rebuild accell table
 796             RebuildAccelTable();
 797         }
 798 #endif // wxUSE_ACCEL
 799
 800         Refresh();
 801     }
 802
 803     m_titles.RemoveAt(pos);
 804
 805     return menu;
 806 }
 807
 808 #if wxUSE_ACCEL
 809
 810 void wxMenuBar::RebuildAccelTable()
 811 {
 812     // merge the accelerators of all menus into one accel table
 813     size_t nAccelCount = 0;
 814     size_t i, count = GetMenuCount();
 815     wxMenuList::iterator it;
 816     for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )
 817     {
 818         nAccelCount += (*it)->GetAccelCount();
 819     }
 820
 821     if ( nAccelCount )
 822     {
 823         wxAcceleratorEntry *accelEntries = new wxAcceleratorEntry[nAccelCount];
 824
 825         nAccelCount = 0;
 826         for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )
 827         {
 828             nAccelCount += (*it)->CopyAccels(&accelEntries[nAccelCount]);
 829         }
 830
 831         m_accelTable = wxAcceleratorTable(nAccelCount, accelEntries);
 832
 833         delete [] accelEntries;
 834     }
 835 }
 836
 837 #endif // wxUSE_ACCEL
 838
 839 void wxMenuBar::Attach(wxFrame *frame)
 840 {
 841     wxMenuBarBase::Attach(frame);
 842
 843 #if wxUSE_ACCEL
 844     RebuildAccelTable();
 845 #endif // wxUSE_ACCEL
 846 }
 847
 848 void wxMenuBar::Detach()
 849 {
 850     wxMenuBarBase::Detach();
 851 }
 852
 853 #endif // wxUSE_MENUS