src/palmos/menu.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/palmos/menu.cpp
   3 // Purpose:     wxMenu, wxMenuBar, wxMenuItem
   4 // Author:      William Osborne - minimal working wxPalmOS port
   5 // Modified by:
   6 // Created:     10/12/04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) William Osborne
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_MENUS
  28
  29 #include "wx/menu.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/frame.h"
  33     #include "wx/utils.h"
  34     #include "wx/intl.h"
  35     #include "wx/log.h"
  36 #endif
  37
  38 #if wxUSE_OWNER_DRAWN
  39     #include "wx/ownerdrw.h"
  40 #endif
  41
  42 #include <Loader.h>
  43 #include <Form.h>
  44 #include <Menu.h>
  45
  46 // ----------------------------------------------------------------------------
  47 // global variables
  48 // ----------------------------------------------------------------------------
  49
  50 extern wxMenu *wxCurrentPopupMenu;
  51
  52 // ----------------------------------------------------------------------------
  53 // constants
  54 // ----------------------------------------------------------------------------
  55
  56 // the (popup) menu title has this special id
  57 static const int idMenuTitle = -3;
  58
  59 // ----------------------------------------------------------------------------
  60 // private functions
  61 // ----------------------------------------------------------------------------
  62
  63 // ============================================================================
  64 // implementation
  65 // ============================================================================
  66
  67 #include "wx/listimpl.cpp"
  68
  69 WX_DEFINE_LIST( wxMenuInfoList )
  70
  71 #if wxUSE_EXTENDED_RTTI
  72
  73 WX_DEFINE_FLAGS( wxMenuStyle )
  74
  75 wxBEGIN_FLAGS( wxMenuStyle )
  76     wxFLAGS_MEMBER(wxMENU_TEAROFF)
  77 wxEND_FLAGS( wxMenuStyle )
  78
  79 IMPLEMENT_DYNAMIC_CLASS_XTI(wxMenu, wxEvtHandler,"wx/menu.h")
  80
  81 wxCOLLECTION_TYPE_INFO( wxMenuItem * , wxMenuItemList ) ;
  82
  83 template<> void wxCollectionToVariantArray( wxMenuItemList const &theList, wxxVariantArray &value)
  84 {
  85     wxListCollectionToVariantArray<wxMenuItemList::compatibility_iterator>( theList , value ) ;
  86 }
  87
  88 wxBEGIN_PROPERTIES_TABLE(wxMenu)
  89     wxEVENT_PROPERTY( Select , wxEVT_COMMAND_MENU_SELECTED , wxCommandEvent)
  90     wxPROPERTY( Title, wxString , SetTitle, GetTitle, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  91     wxREADONLY_PROPERTY_FLAGS( MenuStyle , wxMenuStyle , long , GetStyle , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  92     wxPROPERTY_COLLECTION( MenuItems , wxMenuItemList , wxMenuItem* , Append , GetMenuItems , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  93 wxEND_PROPERTIES_TABLE()
  94
  95 wxBEGIN_HANDLERS_TABLE(wxMenu)
  96 wxEND_HANDLERS_TABLE()
  97
  98 wxDIRECT_CONSTRUCTOR_2( wxMenu , wxString , Title , long , MenuStyle  )
  99
 100 WX_DEFINE_FLAGS( wxMenuBarStyle )
 101
 102 wxBEGIN_FLAGS( wxMenuBarStyle )
 103     wxFLAGS_MEMBER(wxMB_DOCKABLE)
 104 wxEND_FLAGS( wxMenuBarStyle )
 105
 106 // the negative id would lead the window (its superclass !) to vetoe streaming out otherwise
 107 bool wxMenuBarStreamingCallback( const wxObject *WXUNUSED(object), wxWriter * , wxPersister * , wxxVariantArray & )
 108 {
 109     return true ;
 110 }
 111
 112 IMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxMenuBar, wxWindow ,"wx/menu.h",wxMenuBarStreamingCallback)
 113
 114 IMPLEMENT_DYNAMIC_CLASS_XTI(wxMenuInfo, wxObject , "wx/menu.h" )
 115
 116 wxBEGIN_PROPERTIES_TABLE(wxMenuInfo)
 117     wxREADONLY_PROPERTY( Menu , wxMenu* , GetMenu , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 118     wxREADONLY_PROPERTY( Title , wxString , GetTitle , wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 119 wxEND_PROPERTIES_TABLE()
 120
 121 wxBEGIN_HANDLERS_TABLE(wxMenuInfo)
 122 wxEND_HANDLERS_TABLE()
 123
 124 wxCONSTRUCTOR_2( wxMenuInfo , wxMenu* , Menu , wxString , Title )
 125
 126 wxCOLLECTION_TYPE_INFO( wxMenuInfo * , wxMenuInfoList ) ;
 127
 128 template<> void wxCollectionToVariantArray( wxMenuInfoList const &theList, wxxVariantArray &value)
 129 {
 130     wxListCollectionToVariantArray<wxMenuInfoList::compatibility_iterator>( theList , value ) ;
 131 }
 132
 133 wxBEGIN_PROPERTIES_TABLE(wxMenuBar)
 134     wxPROPERTY_COLLECTION( MenuInfos , wxMenuInfoList , wxMenuInfo* , Append , GetMenuInfos , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 135 wxEND_PROPERTIES_TABLE()
 136
 137 wxBEGIN_HANDLERS_TABLE(wxMenuBar)
 138 wxEND_HANDLERS_TABLE()
 139
 140 wxCONSTRUCTOR_DUMMY( wxMenuBar )
 141
 142 #else
 143 IMPLEMENT_DYNAMIC_CLASS(wxMenu, wxEvtHandler)
 144 IMPLEMENT_DYNAMIC_CLASS(wxMenuBar, wxWindow)
 145 IMPLEMENT_DYNAMIC_CLASS(wxMenuInfo, wxObject)
 146 #endif
 147
 148 const wxMenuInfoList& wxMenuBar::GetMenuInfos() const
 149 {
 150     wxMenuInfoList* list = const_cast< wxMenuInfoList* >( &m_menuInfos ) ;
 151     WX_CLEAR_LIST( wxMenuInfoList , *list ) ;
 152     for( size_t i = 0 ; i < GetMenuCount() ; ++i )
 153     {
 154         wxMenuInfo* info = new wxMenuInfo() ;
 155         info->Create( const_cast<wxMenuBar*>(this)->GetMenu(i) , GetLabelTop(i) ) ;
 156         list->Append( info ) ;
 157     }
 158     return m_menuInfos ;
 159 }
 160
 161 // ---------------------------------------------------------------------------
 162 // wxMenu construction, adding and removing menu items
 163 // ---------------------------------------------------------------------------
 164
 165 // Construct a menu with optional title (then use append)
 166 void wxMenu::Init()
 167 {
 168 }
 169
 170 // The wxWindow destructor will take care of deleting the submenus.
 171 wxMenu::~wxMenu()
 172 {
 173 }
 174
 175 void wxMenu::Break()
 176 {
 177 }
 178
 179 void wxMenu::Attach(wxMenuBarBase *menubar)
 180 {
 181     wxMenuBase::Attach(menubar);
 182 }
 183
 184 #if wxUSE_ACCEL
 185
 186 int wxMenu::FindAccel(int id) const
 187 {
 188     return wxNOT_FOUND;
 189 }
 190
 191 void wxMenu::UpdateAccel(wxMenuItem *item)
 192 {
 193 }
 194
 195 #endif // wxUSE_ACCEL
 196
 197 // append a new item or submenu to the menu
 198 bool wxMenu::DoInsertOrAppend(wxMenuItem *pItem, size_t pos)
 199 {
 200     if ( IsAttached() && GetMenuBar()->IsAttached() )
 201     {
 202         // Regenerate the menu resource
 203         GetMenuBar()->Refresh();
 204     }
 205
 206     return true;
 207 }
 208
 209 void wxMenu::EndRadioGroup()
 210 {
 211 }
 212
 213 wxMenuItem* wxMenu::DoAppend(wxMenuItem *item)
 214 {
 215     wxCHECK_MSG( item, NULL, _T("NULL item in wxMenu::DoAppend") );
 216
 217     if(!wxMenuBase::DoAppend(item) || !DoInsertOrAppend(item))
 218     {
 219         return NULL;
 220     }
 221     else if(IsAttached() && GetMenuBar()->IsAttached())
 222     {
 223         // Regenerate the menu resource
 224         GetMenuBar()->Refresh();
 225     }
 226
 227     return item;
 228 }
 229
 230 wxMenuItem* wxMenu::DoInsert(size_t pos, wxMenuItem *item)
 231 {
 232     if (wxMenuBase::DoInsert(pos, item) && DoInsertOrAppend(item, pos))
 233         return item;
 234     else
 235         return NULL;
 236 }
 237
 238 wxMenuItem *wxMenu::DoRemove(wxMenuItem *item)
 239 {
 240     // we need to find the items position in the child list
 241     size_t pos;
 242     wxMenuItemList::compatibility_iterator node = GetMenuItems().GetFirst();
 243     for ( pos = 0; node; pos++ )
 244     {
 245         if ( node->GetData() == item )
 246             break;
 247
 248         node = node->GetNext();
 249     }
 250
 251     // DoRemove() (unlike Remove) can only be called for existing item!
 252     wxCHECK_MSG( node, NULL, wxT("bug in wxMenu::Remove logic") );
 253
 254     // remove the item from the menu
 255     wxMenuItem *ret=wxMenuBase::DoRemove(item);
 256
 257     if ( IsAttached() && GetMenuBar()->IsAttached() )
 258     {
 259         // Regenerate the menu resource
 260         GetMenuBar()->Refresh();
 261     }
 262
 263     return ret;
 264 }
 265
 266 // ---------------------------------------------------------------------------
 267 // accelerator helpers
 268 // ---------------------------------------------------------------------------
 269
 270 #if wxUSE_ACCEL
 271
 272 // create the wxAcceleratorEntries for our accels and put them into provided
 273 // array - return the number of accels we have
 274 size_t wxMenu::CopyAccels(wxAcceleratorEntry *accels) const
 275 {
 276     size_t count = GetAccelCount();
 277     for ( size_t n = 0; n < count; n++ )
 278     {
 279         *accels++ = *m_accels[n];
 280     }
 281
 282     return count;
 283 }
 284
 285 #endif // wxUSE_ACCEL
 286
 287 // ---------------------------------------------------------------------------
 288 // set wxMenu title
 289 // ---------------------------------------------------------------------------
 290
 291 void wxMenu::SetTitle(const wxString& label)
 292 {
 293     m_title = label;
 294
 295     if ( IsAttached() && GetMenuBar()->IsAttached() )
 296     {
 297         // Regenerate the menu resource
 298         GetMenuBar()->Refresh();
 299     }
 300 }
 301
 302 // ---------------------------------------------------------------------------
 303 // event processing
 304 // ---------------------------------------------------------------------------
 305
 306 bool wxMenu::PalmCommand(WXUINT WXUNUSED(param), WXWORD id)
 307 {
 308     return false;
 309 }
 310
 311 // ---------------------------------------------------------------------------
 312 // other
 313 // ---------------------------------------------------------------------------
 314
 315 wxWindow *wxMenu::GetWindow() const
 316 {
 317     return NULL;
 318 }
 319
 320 // ---------------------------------------------------------------------------
 321 // Menu Bar
 322 // ---------------------------------------------------------------------------
 323
 324 void wxMenuBar::Init()
 325 {
 326 }
 327
 328 wxMenuBar::wxMenuBar()
 329 {
 330 }
 331
 332 wxMenuBar::wxMenuBar( long WXUNUSED(style) )
 333 {
 334 }
 335
 336 wxMenuBar::wxMenuBar(size_t count, wxMenu *menus[], const wxString titles[], long WXUNUSED(style))
 337 {
 338 }
 339
 340 wxMenuBar::~wxMenuBar()
 341 {
 342 }
 343
 344 // ---------------------------------------------------------------------------
 345 // wxMenuBar helpers
 346 // ---------------------------------------------------------------------------
 347
 348 void wxMenuBar::Refresh()
 349 {
 350     wxCHECK_RET( IsAttached(), wxT("can't refresh unattached menubar") );
 351
 352        // Regenerate the menu resource
 353     LoadMenu();
 354 }
 355
 356 WXHMENU wxMenuBar::Create()
 357 {
 358     return NULL;
 359 }
 360
 361 int wxMenuBar::PalmPositionForWxMenu(wxMenu *menu, int wxpos)
 362 {
 363     return -1;
 364 }
 365
 366 // ---------------------------------------------------------------------------
 367 // wxMenuBar functions to work with the top level submenus
 368 // ---------------------------------------------------------------------------
 369
 370 void wxMenuBar::EnableTop(size_t pos, bool enable)
 371 {
 372     // Palm OS does not have support for grayed or disabled items
 373 }
 374
 375 void wxMenuBar::SetLabelTop(size_t pos, const wxString& label)
 376 {
 377     wxCHECK_RET( pos < GetMenuCount(), wxT("invalid menu index") );
 378
 379     m_titles[pos]=wxStripMenuCodes(label);
 380
 381     if ( !IsAttached() )
 382     {
 383         return;
 384     }
 385
 386        // Regenerate the menu resource
 387     Refresh();
 388 }
 389
 390 wxString wxMenuBar::GetLabelTop(size_t pos) const
 391 {
 392     wxCHECK_MSG( pos < GetMenuCount(), wxEmptyString,
 393                  wxT("invalid menu index in wxMenuBar::GetLabelTop") );
 394
 395     return wxMenuItem::GetLabelFromText(m_titles[pos]);
 396 }
 397
 398 // ---------------------------------------------------------------------------
 399 // wxMenuBar construction
 400 // ---------------------------------------------------------------------------
 401
 402 wxMenu *wxMenuBar::Replace(size_t pos, wxMenu *menu, const wxString& title)
 403 {
 404    wxMenu *menuOld = wxMenuBarBase::Replace(pos, menu, title);
 405     if ( !menuOld )
 406         return NULL;
 407
 408     m_titles[pos]=wxStripMenuCodes(title);
 409
 410     if ( IsAttached() )
 411     {
 412         // Regenerate the menu resource
 413         Refresh();
 414     }
 415
 416     return menuOld;
 417 }
 418
 419 bool wxMenuBar::Insert(size_t pos, wxMenu *menu, const wxString& title)
 420 {
 421     if ( !wxMenuBarBase::Insert(pos, menu, title) )
 422         return false;
 423
 424     m_titles.Insert(wxStripMenuCodes(title), pos);
 425
 426     if ( IsAttached() )
 427     {
 428         // Regenerate the menu resource
 429         Refresh();
 430     }
 431
 432     return true;
 433 }
 434
 435 bool wxMenuBar::Append(wxMenu *menu, const wxString& title)
 436 {
 437     if ( !wxMenuBarBase::Append(menu, title) )
 438         return false;
 439
 440     m_titles.Add(wxStripMenuCodes(title));
 441
 442     if(IsAttached())
 443     {
 444         // Regenerate the menu resource
 445         Refresh();
 446     }
 447
 448     return true;
 449 }
 450
 451 wxMenu *wxMenuBar::Remove(size_t pos)
 452 {
 453     wxMenu *menu = wxMenuBarBase::Remove(pos);
 454     if ( !menu )
 455         return NULL;
 456
 457     m_titles.RemoveAt(pos);
 458
 459     if (IsAttached())
 460     {
 461         // Regenerate the menu resource
 462         Refresh();
 463     }
 464
 465     return menu;
 466 }
 467
 468 #if wxUSE_ACCEL
 469
 470 void wxMenuBar::RebuildAccelTable()
 471 {
 472 }
 473
 474 #endif // wxUSE_ACCEL
 475
 476 int wxMenuBar::ProcessCommand(int ItemID)
 477 {
 478     if(!IsAttached())
 479         return -1;
 480
 481     int MenuNum=(ItemID/1000)-1;
 482     int ItemNum=(ItemID-(1000*(MenuNum+1)));
 483
 484     // Should never happen, but it doesn't hurt to check anyway.
 485     if(MenuNum>GetMenuCount())
 486         return -1;
 487
 488     // Get the menu
 489     wxMenu *ActiveMenu=GetMenu(MenuNum);
 490
 491     // Make sure this is a valid item.
 492     if(ItemNum>ActiveMenu->GetMenuItemCount())
 493         return -1;
 494
 495     // Get the item
 496     wxMenuItem *ActiveItem=ActiveMenu->FindItemByPosition(ItemNum);
 497     int ActiveID=ActiveItem->GetId();
 498
 499     return ActiveID;
 500 }
 501
 502 /* Palm OS does not have good dynamic menu support.  About all you can do with
 503  * the standard API calls is to add new items to an existing drop-down menu and
 504  * hide/show items in a drop-down menu.  It is impossible to add, hide, or
 505  * change the label on a drop-down menu.
 506  *
 507  * The easiest and simplest way around this limitation is to modify the Palm OS
 508  * MenuBarType structure directly.  This gives limited ability to change the
 509  * label on a drop-down menu.  I have not been able to find a safe way to add,
 510  * delete, or resize drop-down menus in OS 6.
 511  *
 512  * The following routine attempt to work around these limitations present in the
 513  * Palm OS API to provide limited dynamic menu support.  This solution is far
 514  * from perfect, but the only other option is to wait for PalmSource to add full
 515  * dynamic menu support, or to recreate the Palm OS menu system from scratch.
 516  *
 517  * This system is limited in that no more than 4 drop-down menus are allowed per
 518  * menu bar, and the label for each drop-down menu is limited to 8 characters of
 519  * text.  However, this menu system should work for most applications.
 520  *
 521  * Basically the menu routines select one of four menu bars, depending on
 522  * whether or not the requested menu bar has one, two, three, or four drop-down
 523  * menus.
 524  *
 525  * These four "template" menu bars contain one, two, three, or four drop-down
 526  * menus.  Each menu has a dummy menu item attached to it to allow the Palm OS
 527  * MenuAddItem function to add the real items.
 528  *
 529  * The labels on the drop-down menus are then replaced with the labels of the
 530  * real menus.
 531  *
 532  * The menu is then attached to the active window and the MenuAddItem API
 533  * function is called to add the items to each drop-down menu.  Finally,
 534  * MenuHideItem is called to remove the dummy items from each drop-down menu.
 535  */
 536 void wxMenuBar::LoadMenu()
 537 {
 538     int i=0;
 539     int j=0;
 540
 541     // Handle to the currently running application database
 542     DmOpenRef    AppDB;
 543
 544     // Get app database reference - needed for some Palm OS Menu API calls.
 545     SysGetModuleDatabase(SysGetRefNum(), NULL, &AppDB);
 546
 547     // Get the number of menus
 548     int NumMenus=GetMenuCount();
 549
 550     // Set up the pointers and handles
 551     char *PalmOSMenuBarPtr;
 552     MemHandle PalmOSMenuBar;
 553
 554     // Load the menu template and set up the menu pointers
 555     if(NumMenus==1)
 556     {
 557         PalmOSMenuBar=DmGetResource(AppDB,'MBAR',1000);
 558         PalmOSMenuBarPtr=(char *)MemHandleLock(PalmOSMenuBar);
 559
 560         PalmOSMenuBarPtr+=74;
 561     }
 562     else if(NumMenus==2)
 563     {
 564         PalmOSMenuBar=DmGetResource(AppDB,'MBAR',2000);
 565         PalmOSMenuBarPtr=(char *)MemHandleLock(PalmOSMenuBar);
 566
 567         PalmOSMenuBarPtr+=116;
 568     }
 569     else if(NumMenus==3)
 570     {
 571         PalmOSMenuBar=DmGetResource(AppDB,'MBAR',3000);
 572         PalmOSMenuBarPtr=(char *)MemHandleLock(PalmOSMenuBar);
 573
 574         PalmOSMenuBarPtr+=158;
 575     }
 576     else
 577     {
 578         // We support a maximum of 4 menus, so make sure that do not create
 579         // more than we can handle.
 580         NumMenus=4;
 581
 582         PalmOSMenuBar=DmGetResource(AppDB,'MBAR',4000);
 583         PalmOSMenuBarPtr=(char *)MemHandleLock(PalmOSMenuBar);
 584
 585         PalmOSMenuBarPtr+=200;
 586     }
 587
 588     // Set the proper names for the drop-down triggers.
 589     for(i=0;i<NumMenus;i++)
 590     {
 591         // Clear out the old label
 592         char buffer[8]={' ',' ',' ',' ',' ',' ',' ',' '};
 593         MemMove(PalmOSMenuBarPtr,buffer,8);
 594
 595         wxString MenuTitle=m_titles.Item(i);
 596
 597         // Make sure we don't copy more than 8 bytes for the label
 598         int LengthToCopy=MenuTitle.length();
 599         if(LengthToCopy>8)
 600             LengthToCopy=8;
 601
 602         MemMove(PalmOSMenuBarPtr,MenuTitle,LengthToCopy);
 603         PalmOSMenuBarPtr+=11;
 604     }
 605
 606     // We are done with the menu pointer.
 607     MemHandleUnlock(PalmOSMenuBar);
 608     DmReleaseResource(PalmOSMenuBar);
 609
 610     // We must make the menu active before we can add items to the drop-down
 611     // triggers.
 612     FrmSetMenu(FrmGetActiveForm(),AppDB,NumMenus*1000);
 613
 614     /* Add the menu items to the drop-down triggers.  This must be done after
 615      * setting the triggers, because setting the names of drop-down triggers
 616      * that have a variable number of items requires carefull calculation of
 617      * the offsets in the MenuBarType structure.  Setting the triggers first
 618      * avoids this.
 619      */
 620     for(i=0;i<NumMenus;i++)
 621     {
 622         wxMenu *CurrentMenu=GetMenu(i);
 623
 624         for(j=0;j<CurrentMenu->GetMenuItemCount();j++)
 625         {
 626             wxMenuItem *CurrentItem=CurrentMenu->FindItemByPosition(j);
 627             wxString ItemLabel=CurrentItem->GetLabel();
 628
 629             if(CurrentItem->IsSeparator()==true)
 630             {
 631                 char Separator=MenuSeparatorChar;
 632                 if(j==0)
 633                     MenuAddItem(9000+i,((i*1000)+1000)+j,0x00,&Separator);
 634                 else
 635                     MenuAddItem(((i*1000)+1000)+j-1,((i*1000)+1000)+j,0x00,&Separator);
 636             }
 637             else
 638             {
 639                 if(j==0)
 640                     MenuAddItem(9000+i,((i*1000)+1000)+j,0x00,ItemLabel);
 641                 else
 642                     MenuAddItem(((i*1000)+1000)+j-1,((i*1000)+1000)+j,0x00,ItemLabel);
 643             }
 644         }
 645
 646         // Hide the dummy menu item, since we don't need it anymore.
 647         MenuHideItem(9000+i);
 648     }
 649 }
 650
 651 void wxMenuBar::Attach(wxFrame *frame)
 652 {
 653     // before attaching preprocess menus to not include wxID_EXIT item
 654     // as PalmOS guidelines suggest
 655
 656     wxMenuItem *item;
 657     wxMenu *menu;
 658     int i;
 659
 660     while( item = FindItem(wxID_EXIT) )
 661     {
 662         menu = item->GetMenu();
 663         if( !menu ) break; // something broken ?
 664
 665         size_t count = menu->GetMenuItemCount();
 666         if( count == 0 ) break; // something broken ?
 667
 668         // if EXIT is last item in menu
 669         if( menu->FindItemByPosition( count - 1 ) == item )
 670         {
 671             menu->Destroy( item );
 672
 673             // was more than one item?
 674             // was previous separator ?
 675             if( count > 2 )
 676             {
 677                 item = menu->FindItemByPosition( count - 2 );
 678                 if(item && item->IsSeparator())
 679                     menu->Destroy( item );
 680             }
 681         }
 682
 683         // if EXIT is first item in menu
 684         else if( menu->FindItemByPosition( 0 ) == item )
 685         {
 686             menu->Destroy( item );
 687
 688             // was more than one item?
 689             // was previous separator ?
 690             if( count > 2 )
 691             {
 692                 item = menu->FindItemByPosition( 0 );
 693                 if(item && item->IsSeparator())
 694                     menu->Destroy( item );
 695             }
 696         }
 697
 698         // if EXIT is in the middle but before and after are selectors
 699         else
 700         {
 701             i = 1; // 0 case already done
 702             while ( (i < count) && (menu->FindItemByPosition( 0 ) != item) )
 703             {
 704                 i++;
 705             }
 706
 707             if (i >= count) break;
 708             if (menu->FindItemByPosition( i ) != item) break;
 709             menu->Destroy( item );
 710             item = menu->FindItemByPosition( i );
 711             if ( item &&
 712                  item->IsSeparator() &&
 713                  menu->FindItemByPosition( i-1 )->IsSeparator() )
 714             {
 715                 // noe need for two neighbouring separators
 716                 menu->Destroy( item );
 717             }
 718         }
 719     }
 720
 721     // check if we received any empty menu!
 722     i = 0;
 723     while(i < GetMenuCount())
 724     {
 725         menu = GetMenu(i);
 726
 727         if( menu && (menu->GetMenuItemCount()==0) )
 728         {
 729             menu = Remove( i );
 730             delete menu;
 731         }
 732         else
 733             i++;
 734     }
 735
 736     wxMenuBarBase::Attach(frame);
 737
 738     LoadMenu();
 739 }
 740
 741 void wxMenuBar::Detach()
 742 {
 743     wxMenuBarBase::Detach();
 744 }
 745
 746 #endif // wxUSE_MENUS