src/mac/toplevel.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        mac/toplevel.cpp
   3 // Purpose:     implements wxTopLevelWindow for MSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     24.09.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   9 // License:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "toplevel.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/app.h"
  33     #include "wx/toplevel.h"
  34     #include "wx/frame.h"
  35     #include "wx/string.h"
  36     #include "wx/log.h"
  37     #include "wx/intl.h"
  38 #endif //WX_PRECOMP
  39
  40 #include "wx/mac/uma.h"
  41 #include "wx/mac/aga.h"
  42 #include "wx/app.h"
  43 #include "wx/tooltip.h"
  44 #include "wx/dnd.h"
  45
  46 #define wxMAC_DEBUG_REDRAW 0
  47 #ifndef wxMAC_DEBUG_REDRAW
  48 #define wxMAC_DEBUG_REDRAW 0
  49 #endif
  50
  51 // ----------------------------------------------------------------------------
  52 // globals
  53 // ----------------------------------------------------------------------------
  54
  55 // list of all frames and modeless dialogs
  56 wxWindowList       wxModelessWindows;
  57
  58 // double click testing
  59 static   Point     gs_lastWhere;
  60 static   long      gs_lastWhen = 0;
  61
  62 // cursor stuff
  63 extern   int       wxBusyCursorCount;
  64
  65
  66 // ============================================================================
  67 // wxTopLevelWindowMac implementation
  68 // ============================================================================
  69
  70 // ---------------------------------------------------------------------------
  71 // wxWindowMac utility functions
  72 // ---------------------------------------------------------------------------
  73
  74 // Find an item given the Macintosh Window Reference
  75
  76 wxList *wxWinMacWindowList = NULL;
  77 wxTopLevelWindowMac *wxFindWinFromMacWindow(WXWindow inWindowRef)
  78 {
  79     wxNode *node = wxWinMacWindowList->Find((long)inWindowRef);
  80     if (!node)
  81         return NULL;
  82     return (wxTopLevelWindowMac *)node->Data();
  83 }
  84
  85 void wxAssociateWinWithMacWindow(WXWindow inWindowRef, wxTopLevelWindowMac *win)
  86 {
  87     // adding NULL WindowRef is (first) surely a result of an error and
  88     // (secondly) breaks menu command processing
  89     wxCHECK_RET( inWindowRef != (WindowRef) NULL, "attempt to add a NULL WindowRef to window list" );
  90
  91     if ( !wxWinMacWindowList->Find((long)inWindowRef) )
  92         wxWinMacWindowList->Append((long)inWindowRef, win);
  93 }
  94
  95 void wxRemoveMacWindowAssociation(wxTopLevelWindowMac *win)
  96 {
  97     wxWinMacWindowList->DeleteObject(win);
  98 }
  99
 100
 101 // ----------------------------------------------------------------------------
 102 // wxTopLevelWindowMac creation
 103 // ----------------------------------------------------------------------------
 104
 105 WXHWND wxTopLevelWindowMac::s_macWindowInUpdate = NULL;
 106
 107 void wxTopLevelWindowMac::Init()
 108 {
 109     m_iconized =
 110     m_maximizeOnShow = FALSE;
 111     m_macNoEraseUpdateRgn = NewRgn() ;
 112     m_macNeedsErasing = false ;
 113     m_macWindow = NULL ;
 114     m_macEventHandler = NULL ;
 115 }
 116
 117 class wxMacDeferredWindowDeleter : public wxObject
 118 {
 119 public :
 120     wxMacDeferredWindowDeleter( WindowRef windowRef )
 121     {
 122         m_macWindow = windowRef ;
 123     }
 124     virtual ~wxMacDeferredWindowDeleter()
 125     {
 126         UMADisposeWindow( (WindowRef) m_macWindow ) ;
 127     }
 128  protected :
 129     WindowRef m_macWindow ;
 130 } ;
 131
 132 bool wxTopLevelWindowMac::Create(wxWindow *parent,
 133                                  wxWindowID id,
 134                                  const wxString& title,
 135                                  const wxPoint& pos,
 136                                  const wxSize& size,
 137                                  long style,
 138                                  const wxString& name)
 139 {
 140     // init our fields
 141     Init();
 142
 143     m_windowStyle = style;
 144
 145     SetName(name);
 146
 147     m_windowId = id == -1 ? NewControlId() : id;
 148
 149     wxTopLevelWindows.Append(this);
 150
 151     if ( parent )
 152         parent->AddChild(this);
 153
 154     return TRUE;
 155 }
 156
 157 wxTopLevelWindowMac::~wxTopLevelWindowMac()
 158 {
 159     if ( m_macWindow )
 160     {
 161         wxToolTip::NotifyWindowDelete(m_macWindow) ;
 162         wxPendingDelete.Append( new wxMacDeferredWindowDeleter( (WindowRef) m_macWindow ) ) ;
 163     }
 164
 165 #if TARGET_CARBON
 166     if ( m_macEventHandler )
 167     {
 168         ::RemoveEventHandler((EventHandlerRef) m_macEventHandler);
 169         m_macEventHandler = NULL ;
 170     }
 171 #endif
 172     wxRemoveMacWindowAssociation( this ) ;
 173
 174     if ( wxModelessWindows.Find(this) )
 175         wxModelessWindows.DeleteObject(this);
 176
 177     DisposeRgn( (RgnHandle) m_macNoEraseUpdateRgn ) ;
 178 }
 179
 180
 181 // ----------------------------------------------------------------------------
 182 // wxTopLevelWindowMac maximize/minimize
 183 // ----------------------------------------------------------------------------
 184
 185 void wxTopLevelWindowMac::Maximize(bool maximize)
 186 {
 187     // not available on mac
 188 }
 189
 190 bool wxTopLevelWindowMac::IsMaximized() const
 191 {
 192     return false ;
 193 }
 194
 195 void wxTopLevelWindowMac::Iconize(bool iconize)
 196 {
 197     // not available on mac
 198 }
 199
 200 bool wxTopLevelWindowMac::IsIconized() const
 201 {
 202     // mac dialogs cannot be iconized
 203     return FALSE;
 204 }
 205
 206 void wxTopLevelWindowMac::Restore()
 207 {
 208     // not available on mac
 209 }
 210
 211 // ----------------------------------------------------------------------------
 212 // wxTopLevelWindowMac misc
 213 // ----------------------------------------------------------------------------
 214
 215 void wxTopLevelWindowMac::SetIcon(const wxIcon& icon)
 216 {
 217     // this sets m_icon
 218     wxTopLevelWindowBase::SetIcon(icon);
 219 }
 220
 221 #if TARGET_CARBON
 222
 223 EventHandlerUPP wxMacWindowEventHandlerUPP = NULL ;
 224
 225 extern long wxMacTranslateKey(unsigned char key, unsigned char code) ;
 226
 227 pascal OSStatus wxMacWindowEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
 228 {
 229     OSStatus result = eventNotHandledErr ;
 230     EventRecord rec ;
 231     switch ( GetEventClass( event ) )
 232     {
 233         case kEventClassTextInput :
 234             if ( wxMacConvertEventToRecord( event , &rec ) )
 235             {
 236                         wxTheApp->m_macCurrentEvent = &rec ;
 237                 wxWindow* focus = wxWindow::FindFocus() ;
 238                 if ( (focus != NULL) && wxTheApp->MacSendKeyDownEvent( focus , rec.message , rec.modifiers , rec.when , rec.where.h , rec.where.v ) )
 239                 {
 240                     // was handled internally
 241                     result = noErr ;
 242                 }
 243             }
 244             break ;
 245         default :
 246             break ;
 247     }
 248     return result ;
 249 }
 250
 251 #endif
 252
 253 void wxTopLevelWindowMac::MacInstallEventHandler()
 254 {
 255 #if TARGET_CARBON
 256         if ( wxMacWindowEventHandlerUPP == NULL )
 257         {
 258             wxMacWindowEventHandlerUPP = NewEventHandlerUPP( wxMacWindowEventHandler ) ;
 259         }
 260
 261         static const EventTypeSpec eventList[] =
 262         {
 263             { kEventClassTextInput, kEventTextInputUnicodeForKeyEvent }
 264         } ;
 265         if ( m_macEventHandler )
 266         {
 267         ::RemoveEventHandler((EventHandlerRef) m_macEventHandler);
 268         m_macEventHandler = NULL ;
 269     }
 270         InstallWindowEventHandler(MAC_WXHWND(m_macWindow), wxMacWindowEventHandlerUPP, WXSIZEOF(eventList), eventList, this, &((EventHandlerRef)m_macEventHandler));
 271 #endif
 272 }
 273
 274 void  wxTopLevelWindowMac::MacCreateRealWindow( const wxString& title,
 275            const wxPoint& pos,
 276            const wxSize& size,
 277            long style,
 278            const wxString& name )
 279 {
 280   SetName(name);
 281   m_windowStyle = style;
 282   m_isShown = FALSE;
 283
 284   // create frame.
 285
 286     Rect theBoundsRect;
 287
 288   m_x = (int)pos.x;
 289   m_y = (int)pos.y;
 290   if ( m_y < 50 )
 291     m_y = 50 ;
 292   if ( m_x < 20 )
 293     m_x = 20 ;
 294
 295   m_width = size.x;
 296     if (m_width == -1)
 297         m_width = 20;
 298   m_height = size.y;
 299     if (m_height == -1)
 300         m_height = 20;
 301
 302     ::SetRect(&theBoundsRect, m_x, m_y , m_x + m_width, m_y + m_height);
 303
 304     // translate the window attributes in the appropriate window class and attributes
 305
 306     WindowClass wclass = 0;
 307     WindowAttributes attr = kWindowNoAttributes ;
 308
 309     if ( HasFlag( wxFRAME_TOOL_WINDOW) )
 310     {
 311         if (
 312             HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) ||
 313             HasFlag( wxSYSTEM_MENU ) || HasFlag( wxCAPTION ) ||
 314             HasFlag(wxTINY_CAPTION_HORIZ) ||  HasFlag(wxTINY_CAPTION_VERT)
 315              )
 316         {
 317             wclass = kFloatingWindowClass ;
 318             if ( HasFlag(wxTINY_CAPTION_VERT) )
 319             {
 320                 attr |= kWindowSideTitlebarAttribute ;
 321             }
 322         }
 323         else
 324         {
 325             wclass = kPlainWindowClass ;
 326         }
 327     }
 328     else if ( HasFlag( wxCAPTION ) )
 329     {
 330         if ( HasFlag( wxDIALOG_MODAL ) )
 331         {
 332             wclass = kDocumentWindowClass ; // kMovableModalWindowClass ;
 333         }
 334         else
 335         {
 336             wclass = kDocumentWindowClass ;
 337         }
 338     }
 339     else
 340     {
 341         if ( HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) ||
 342              HasFlag( wxSYSTEM_MENU ) )
 343         {
 344             wclass = kDocumentWindowClass ;
 345         }
 346         else
 347         {
 348             wclass = kPlainWindowClass ;
 349         }
 350     }
 351
 352     if ( HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) )
 353     {
 354         attr |= kWindowFullZoomAttribute ;
 355         attr |= kWindowCollapseBoxAttribute ;
 356     }
 357     if ( HasFlag( wxRESIZE_BORDER ) )
 358     {
 359         attr |= kWindowResizableAttribute ;
 360     }
 361     if ( HasFlag( wxSYSTEM_MENU ) )
 362     {
 363         attr |= kWindowCloseBoxAttribute ;
 364     }
 365
 366     ::CreateNewWindow( wclass , attr , &theBoundsRect , (WindowRef*)&m_macWindow ) ;
 367     wxAssociateWinWithMacWindow( m_macWindow , this ) ;
 368     wxString label ;
 369     if( wxApp::s_macDefaultEncodingIsPC )
 370         label = wxMacMakeMacStringFromPC( title ) ;
 371     else
 372         label = title ;
 373     UMASetWTitleC( (WindowRef)m_macWindow , label ) ;
 374     ::CreateRootControl( (WindowRef)m_macWindow , (ControlHandle*)&m_macRootControl ) ;
 375     MacInstallEventHandler() ;
 376
 377     m_macFocus = NULL ;
 378 }
 379
 380 void wxTopLevelWindowMac::MacGetPortParams(WXPOINTPTR localOrigin, WXRECTPTR clipRect, WXHWND *window  , wxWindowMac** rootwin)
 381 {
 382     ((Point*)localOrigin)->h = 0;
 383     ((Point*)localOrigin)->v = 0;
 384     ((Rect*)clipRect)->left = 0;
 385     ((Rect*)clipRect)->top = 0;
 386     ((Rect*)clipRect)->right = m_width;
 387     ((Rect*)clipRect)->bottom = m_height;
 388     *window = m_macWindow ;
 389     *rootwin = this ;
 390 }
 391
 392 void wxTopLevelWindowMac::Clear()
 393 {
 394   wxWindow::Clear() ;
 395 }
 396
 397 WXWidget wxTopLevelWindowMac::MacGetContainerForEmbedding()
 398 {
 399     return m_macRootControl ;
 400 }
 401
 402
 403 void wxTopLevelWindowMac::MacUpdate( long timestamp)
 404 {
 405
 406     wxMacPortStateHelper help( (GrafPtr) GetWindowPort( (WindowRef) m_macWindow) ) ;
 407
 408     BeginUpdate( (WindowRef)m_macWindow ) ;
 409
 410     RgnHandle       updateRgn = NewRgn();
 411     RgnHandle       diffRgn = NewRgn() ;
 412     if ( updateRgn && diffRgn )
 413     {
 414         GetPortVisibleRegion( GetWindowPort( (WindowRef)m_macWindow ), updateRgn );
 415         DiffRgn( updateRgn , (RgnHandle) m_macNoEraseUpdateRgn , diffRgn ) ;
 416         if ( !EmptyRgn( updateRgn ) )
 417         {
 418             MacRedraw( updateRgn , timestamp , m_macNeedsErasing || !EmptyRgn( diffRgn )  ) ;
 419         }
 420     }
 421     if ( updateRgn )
 422         DisposeRgn( updateRgn );
 423     if ( diffRgn )
 424         DisposeRgn( diffRgn );
 425     EndUpdate( (WindowRef)m_macWindow ) ;
 426     SetEmptyRgn( (RgnHandle) m_macNoEraseUpdateRgn ) ;
 427     m_macNeedsErasing = false ;
 428 }
 429
 430
 431 // Raise the window to the top of the Z order
 432 void wxTopLevelWindowMac::Raise()
 433 {
 434     ::BringToFront( (WindowRef)m_macWindow ) ;
 435 }
 436
 437 // Lower the window to the bottom of the Z order
 438 void wxTopLevelWindowMac::Lower()
 439 {
 440     ::SendBehind( (WindowRef)m_macWindow , NULL ) ;
 441 }
 442
 443 void wxTopLevelWindowMac::MacFireMouseEvent( WXEVENTREF evr )
 444 {
 445     EventRecord *ev = (EventRecord*) evr ;
 446     wxMouseEvent event(wxEVT_LEFT_DOWN);
 447     bool isDown = !(ev->modifiers & btnState) ; // 1 is for up
 448     bool controlDown = ev->modifiers & controlKey ; // for simulating right mouse
 449
 450     event.m_leftDown = isDown && !controlDown;
 451
 452     event.m_middleDown = FALSE;
 453     event.m_rightDown = isDown && controlDown;
 454
 455     if ( ev->what == mouseDown )
 456     {
 457         if ( controlDown )
 458             event.SetEventType(wxEVT_RIGHT_DOWN ) ;
 459         else
 460             event.SetEventType(wxEVT_LEFT_DOWN ) ;
 461     }
 462     else if ( ev->what == mouseUp )
 463     {
 464         if ( controlDown )
 465             event.SetEventType(wxEVT_RIGHT_UP ) ;
 466         else
 467             event.SetEventType(wxEVT_LEFT_UP ) ;
 468     }
 469     else
 470     {
 471         event.SetEventType(wxEVT_MOTION ) ;
 472     }
 473
 474     event.m_shiftDown = ev->modifiers & shiftKey;
 475     event.m_controlDown = ev->modifiers & controlKey;
 476     event.m_altDown = ev->modifiers & optionKey;
 477     event.m_metaDown = ev->modifiers & cmdKey;
 478
 479     Point       localwhere = ev->where ;
 480
 481     GrafPtr     port ;
 482     ::GetPort( &port ) ;
 483     ::SetPort( UMAGetWindowPort( (WindowRef)m_macWindow ) ) ;
 484     ::GlobalToLocal( &localwhere ) ;
 485     ::SetPort( port ) ;
 486
 487     if ( ev->what == mouseDown )
 488     {
 489         if ( ev->when - gs_lastWhen <= GetDblTime() )
 490         {
 491             if ( abs( localwhere.h - gs_lastWhere.h ) < 3 && abs( localwhere.v - gs_lastWhere.v ) < 3 )
 492             {
 493                 // This is not right if the second mouse down
 494                 // event occured in a differen window. We
 495                 // correct this in MacDispatchMouseEvent.
 496                 if ( controlDown )
 497                     event.SetEventType(wxEVT_RIGHT_DCLICK ) ;
 498                 else
 499                     event.SetEventType(wxEVT_LEFT_DCLICK ) ;
 500             }
 501             gs_lastWhen = 0 ;
 502         }
 503         else
 504         {
 505             gs_lastWhen = ev->when ;
 506         }
 507         gs_lastWhere = localwhere ;
 508     }
 509
 510     event.m_x = localwhere.h;
 511     event.m_y = localwhere.v;
 512     event.m_x += m_x;
 513     event.m_y += m_y;
 514
 515     event.m_timeStamp = ev->when;
 516     event.SetEventObject(this);
 517     if ( wxTheApp->s_captureWindow )
 518     {
 519         int x = event.m_x ;
 520         int y = event.m_y ;
 521         wxTheApp->s_captureWindow->ScreenToClient( &x , &y ) ;
 522         event.m_x = x ;
 523         event.m_y = y ;
 524         event.SetEventObject( wxTheApp->s_captureWindow ) ;
 525         wxTheApp->s_captureWindow->GetEventHandler()->ProcessEvent( event ) ;
 526
 527         if ( ev->what == mouseUp )
 528         {
 529             wxTheApp->s_captureWindow = NULL ;
 530             if ( wxBusyCursorCount == 0 )
 531             {
 532                 m_cursor.MacInstall() ;
 533             }
 534         }
 535     }
 536     else
 537     {
 538         MacDispatchMouseEvent( event ) ;
 539     }
 540 }
 541
 542 void wxTopLevelWindowMac::MacMouseDown( WXEVENTREF ev , short part)
 543 {
 544     MacFireMouseEvent( ev ) ;
 545 }
 546
 547 void wxTopLevelWindowMac::MacMouseUp( WXEVENTREF ev , short part)
 548 {
 549     switch (part)
 550     {
 551         case inContent:
 552             {
 553                 MacFireMouseEvent( ev ) ;
 554             }
 555             break ;
 556     }
 557 }
 558
 559 void wxTopLevelWindowMac::MacMouseMoved( WXEVENTREF ev , short part)
 560 {
 561     switch (part)
 562     {
 563         case inContent:
 564             {
 565                 MacFireMouseEvent( ev ) ;
 566             }
 567             break ;
 568     }
 569 }
 570 void wxTopLevelWindowMac::MacActivate( WXEVENTREF ev , bool inIsActivating )
 571 {
 572     wxActivateEvent event(wxEVT_ACTIVATE, inIsActivating , m_windowId);
 573     event.m_timeStamp = ((EventRecord*)ev)->when ;
 574     event.SetEventObject(this);
 575
 576     GetEventHandler()->ProcessEvent(event);
 577
 578     UMAHighlightAndActivateWindow( (WindowRef)m_macWindow , inIsActivating ) ;
 579
 580     MacSuperEnabled( inIsActivating ) ;
 581 }
 582
 583 void wxTopLevelWindowMac::MacKeyDown( WXEVENTREF ev )
 584 {
 585 }
 586
 587 void wxTopLevelWindowMac::SetTitle(const wxString& title)
 588 {
 589     wxWindow::SetTitle( title ) ;
 590
 591     wxString label ;
 592
 593     if( wxApp::s_macDefaultEncodingIsPC )
 594         label = wxMacMakeMacStringFromPC( m_label ) ;
 595     else
 596         label = m_label ;
 597
 598     UMASetWTitleC( (WindowRef)m_macWindow , label ) ;
 599 }
 600
 601 bool wxTopLevelWindowMac::Show(bool show)
 602 {
 603     if ( !wxWindow::Show(show) )
 604         return FALSE;
 605
 606     if (show)
 607     {
 608       ::ShowWindow( (WindowRef)m_macWindow ) ;
 609       ::SelectWindow( (WindowRef)m_macWindow ) ;
 610       // no need to generate events here, they will get them triggered by macos
 611       // actually they should be , but apparently they are not
 612       wxSize size(m_width, m_height);
 613       wxSizeEvent event(size, m_windowId);
 614       event.SetEventObject(this);
 615       GetEventHandler()->ProcessEvent(event);
 616     }
 617     else
 618     {
 619       ::HideWindow( (WindowRef)m_macWindow ) ;
 620     }
 621
 622     if ( !show )
 623     {
 624     }
 625     else
 626     {
 627         Refresh() ;
 628     }
 629
 630     return TRUE;
 631 }
 632
 633 void wxTopLevelWindowMac::DoMoveWindow(int x, int y, int width, int height)
 634 {
 635     int former_x = m_x ;
 636     int former_y = m_y ;
 637     int former_w = m_width ;
 638     int former_h = m_height ;
 639
 640   int actualWidth = width;
 641   int actualHeight = height;
 642   int actualX = x;
 643   int actualY = y;
 644
 645     if ((m_minWidth != -1) && (actualWidth < m_minWidth))
 646         actualWidth = m_minWidth;
 647     if ((m_minHeight != -1) && (actualHeight < m_minHeight))
 648         actualHeight = m_minHeight;
 649     if ((m_maxWidth != -1) && (actualWidth > m_maxWidth))
 650         actualWidth = m_maxWidth;
 651     if ((m_maxHeight != -1) && (actualHeight > m_maxHeight))
 652         actualHeight = m_maxHeight;
 653
 654     bool doMove = false ;
 655     bool doResize = false ;
 656
 657     if ( actualX != former_x || actualY != former_y )
 658     {
 659         doMove = true ;
 660     }
 661     if ( actualWidth != former_w || actualHeight != former_h )
 662     {
 663         doResize = true ;
 664     }
 665
 666     if ( doMove || doResize )
 667     {
 668         m_x = actualX ;
 669         m_y = actualY ;
 670         m_width = actualWidth ;
 671         m_height = actualHeight ;
 672
 673         if ( doMove )
 674             ::MoveWindow((WindowRef)m_macWindow, m_x, m_y  , false); // don't make frontmost
 675
 676         if ( doResize )
 677             ::SizeWindow((WindowRef)m_macWindow, m_width, m_height  , true);
 678
 679         // the OS takes care of invalidating and erasing the new area
 680         // we have erased the old one
 681
 682         if ( IsKindOf( CLASSINFO( wxFrame ) ) )
 683         {
 684             wxFrame* frame = (wxFrame*) this ;
 685             frame->PositionStatusBar();
 686             frame->PositionToolBar();
 687         }
 688         if ( doMove )
 689             wxWindowMac::MacTopLevelWindowChangedPosition() ; // like this only children will be notified
 690
 691         MacRepositionScrollBars() ;
 692         if ( doMove )
 693         {
 694             wxPoint point(m_x, m_y);
 695             wxMoveEvent event(point, m_windowId);
 696             event.SetEventObject(this);
 697             GetEventHandler()->ProcessEvent(event) ;
 698         }
 699         if ( doResize )
 700         {
 701              MacRepositionScrollBars() ;
 702              wxSize size(m_width, m_height);
 703              wxSizeEvent event(size, m_windowId);
 704              event.SetEventObject(this);
 705              GetEventHandler()->ProcessEvent(event);
 706         }
 707     }
 708
 709 }
 710
 711 /*
 712  * Invalidation Mechanism
 713  *
 714  * The update mechanism reflects exactely the windows mechanism
 715  * the rect gets added to the window invalidate region, if the eraseBackground flag
 716  * has been true for any part of the update rgn the background is erased in the entire region
 717  * not just in the specified rect.
 718  *
 719  * In order to achive this, we also have an internal m_macNoEraseUpdateRgn, all rects that have
 720  * the eraseBackground flag set to false are also added to this rgn. upon receiving an update event
 721  * the update rgn is compared to the m_macNoEraseUpdateRgn and in case they differ, every window
 722  * will get the eraseBackground event first
 723  */
 724
 725 void wxTopLevelWindowMac::MacInvalidate( const WXRECTPTR rect, bool eraseBackground )
 726 {
 727   GrafPtr formerPort ;
 728   GetPort( &formerPort ) ;
 729   SetPortWindowPort( (WindowRef)m_macWindow ) ;
 730
 731   m_macNeedsErasing |= eraseBackground ;
 732
 733   // if we already know that we will have to erase, there's no need to track the rest
 734   if ( !m_macNeedsErasing)
 735   {
 736     // we end only here if eraseBackground is false
 737     // if we already have a difference between m_macNoEraseUpdateRgn and UpdateRgn
 738     // we will have to erase anyway
 739
 740     RgnHandle       updateRgn = NewRgn();
 741     RgnHandle       diffRgn = NewRgn() ;
 742     if ( updateRgn && diffRgn )
 743     {
 744         GetWindowUpdateRgn( (WindowRef)m_macWindow , updateRgn );
 745         Point pt = {0,0} ;
 746         LocalToGlobal( &pt ) ;
 747         OffsetRgn( updateRgn , -pt.h , -pt.v ) ;
 748         DiffRgn( updateRgn , (RgnHandle) m_macNoEraseUpdateRgn , diffRgn ) ;
 749         if ( !EmptyRgn( diffRgn ) )
 750         {
 751             m_macNeedsErasing = true ;
 752         }
 753     }
 754     if ( updateRgn )
 755         DisposeRgn( updateRgn );
 756     if ( diffRgn )
 757         DisposeRgn( diffRgn );
 758
 759     if ( !m_macNeedsErasing )
 760     {
 761       RgnHandle rectRgn = NewRgn() ;
 762       SetRectRgn( rectRgn , ((Rect*)rect)->left , ((Rect*)rect)->top , ((Rect*)rect)->right , ((Rect*)rect)->bottom ) ;
 763       UnionRgn( (RgnHandle) m_macNoEraseUpdateRgn , rectRgn , (RgnHandle) m_macNoEraseUpdateRgn ) ;
 764       DisposeRgn( rectRgn ) ;
 765     }
 766   }
 767   InvalWindowRect( (WindowRef)m_macWindow , (Rect*)rect ) ;
 768   // turn this on to debug the refreshing cycle
 769 #if wxMAC_DEBUG_REDRAW
 770   PaintRect( rect ) ;
 771 #endif
 772   SetPort( formerPort ) ;
 773 }
 774