src/mac/carbon/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     wxTopLevelWindows.DeleteObject(this);
 175
 176     if ( wxModelessWindows.Find(this) )
 177         wxModelessWindows.DeleteObject(this);
 178
 179     // If this is the last top-level window, exit.
 180     if ( wxTheApp && (wxTopLevelWindows.Number() == 0) )
 181     {
 182         wxTheApp->SetTopWindow(NULL);
 183
 184         if ( wxTheApp->GetExitOnFrameDelete() )
 185         {
 186           wxTheApp->ExitMainLoop() ;
 187         }
 188     }
 189     DisposeRgn( (RgnHandle) m_macNoEraseUpdateRgn ) ;
 190 }
 191
 192
 193 // ----------------------------------------------------------------------------
 194 // wxTopLevelWindowMac maximize/minimize
 195 // ----------------------------------------------------------------------------
 196
 197 void wxTopLevelWindowMac::Maximize(bool maximize)
 198 {
 199     // not available on mac
 200 }
 201
 202 bool wxTopLevelWindowMac::IsMaximized() const
 203 {
 204     return false ;
 205 }
 206
 207 void wxTopLevelWindowMac::Iconize(bool iconize)
 208 {
 209     // not available on mac
 210 }
 211
 212 bool wxTopLevelWindowMac::IsIconized() const
 213 {
 214     // mac dialogs cannot be iconized
 215     return FALSE;
 216 }
 217
 218 void wxTopLevelWindowMac::Restore()
 219 {
 220     // not available on mac
 221 }
 222
 223 // ----------------------------------------------------------------------------
 224 // wxTopLevelWindowMac misc
 225 // ----------------------------------------------------------------------------
 226
 227 void wxTopLevelWindowMac::SetIcon(const wxIcon& icon)
 228 {
 229     // this sets m_icon
 230     wxTopLevelWindowBase::SetIcon(icon);
 231 }
 232
 233 #if TARGET_CARBON
 234
 235 EventHandlerUPP wxMacWindowEventHandlerUPP = NULL ;
 236
 237 pascal OSStatus wxMacWindowEventHandler( EventHandlerCallRef handler , EventRef event , void *data )
 238 {
 239     OSStatus result = eventNotHandledErr ;
 240     EventRecord rec ;
 241     switch ( GetEventClass( event ) )
 242     {
 243         case kEventClassTextInput :
 244             if ( wxMacConvertEventToRecord( event , &rec ) )
 245             {
 246                 wxTheApp->MacHandleOneEvent( &rec ) ;
 247                 result = noErr ;
 248             }
 249             break ;
 250         default :
 251             break ;
 252     }
 253     return result ;
 254 }
 255
 256 #endif
 257
 258 void wxTopLevelWindowMac::MacInstallEventHandler()
 259 {
 260 #if TARGET_CARBON
 261         if ( wxMacWindowEventHandlerUPP == NULL )
 262         {
 263             wxMacWindowEventHandlerUPP = NewEventHandlerUPP( wxMacWindowEventHandler ) ;
 264         }
 265
 266         static const EventTypeSpec eventList[] =
 267         {
 268             { kEventClassTextInput, kEventTextInputUnicodeForKeyEvent }
 269         } ;
 270         if ( m_macEventHandler )
 271         {
 272         ::RemoveEventHandler((EventHandlerRef) m_macEventHandler);
 273         m_macEventHandler = NULL ;
 274     }
 275         InstallWindowEventHandler(MAC_WXHWND(m_macWindow), wxMacWindowEventHandlerUPP, WXSIZEOF(eventList), eventList, this, &((EventHandlerRef)m_macEventHandler));
 276 #endif
 277 }
 278
 279 void  wxTopLevelWindowMac::MacCreateRealWindow( const wxString& title,
 280            const wxPoint& pos,
 281            const wxSize& size,
 282            long style,
 283            const wxString& name )
 284 {
 285   SetName(name);
 286   m_windowStyle = style;
 287   m_isShown = FALSE;
 288
 289   // create frame.
 290
 291     Rect theBoundsRect;
 292
 293   m_x = (int)pos.x;
 294   m_y = (int)pos.y;
 295   if ( m_y < 50 )
 296     m_y = 50 ;
 297   if ( m_x < 20 )
 298     m_x = 20 ;
 299
 300   m_width = size.x;
 301     if (m_width == -1)
 302         m_width = 20;
 303   m_height = size.y;
 304     if (m_height == -1)
 305         m_height = 20;
 306
 307     ::SetRect(&theBoundsRect, m_x, m_y , m_x + m_width, m_y + m_height);
 308
 309     // translate the window attributes in the appropriate window class and attributes
 310
 311     WindowClass wclass = 0;
 312     WindowAttributes attr = kWindowNoAttributes ;
 313
 314     if ( HasFlag( wxFRAME_TOOL_WINDOW) )
 315     {
 316         if (
 317             HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) ||
 318             HasFlag( wxSYSTEM_MENU ) || HasFlag( wxCAPTION ) ||
 319             HasFlag(wxTINY_CAPTION_HORIZ) ||  HasFlag(wxTINY_CAPTION_VERT)
 320              )
 321         {
 322             wclass = kFloatingWindowClass ;
 323             if ( HasFlag(wxTINY_CAPTION_VERT) )
 324             {
 325                 attr |= kWindowSideTitlebarAttribute ;
 326             }
 327         }
 328         else
 329         {
 330             wclass = kPlainWindowClass ;
 331         }
 332     }
 333     else if ( HasFlag( wxCAPTION ) )
 334     {
 335         if ( HasFlag( wxDIALOG_MODAL ) )
 336         {
 337             wclass = kDocumentWindowClass ; // kMovableModalWindowClass ;
 338         }
 339         else
 340         {
 341             wclass = kDocumentWindowClass ;
 342         }
 343     }
 344     else
 345     {
 346         if ( HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) ||
 347              HasFlag( wxSYSTEM_MENU ) )
 348         {
 349             wclass = kDocumentWindowClass ;
 350         }
 351         else
 352         {
 353             wclass = kPlainWindowClass ;
 354         }
 355     }
 356
 357     if ( HasFlag( wxMINIMIZE_BOX ) || HasFlag( wxMAXIMIZE_BOX ) )
 358     {
 359         attr |= kWindowFullZoomAttribute ;
 360         attr |= kWindowCollapseBoxAttribute ;
 361     }
 362     if ( HasFlag( wxRESIZE_BORDER ) )
 363     {
 364         attr |= kWindowResizableAttribute ;
 365     }
 366     if ( HasFlag( wxSYSTEM_MENU ) )
 367     {
 368         attr |= kWindowCloseBoxAttribute ;
 369     }
 370
 371     ::CreateNewWindow( wclass , attr , &theBoundsRect , (WindowRef*)&m_macWindow ) ;
 372     wxAssociateWinWithMacWindow( m_macWindow , this ) ;
 373     wxString label ;
 374     if( wxApp::s_macDefaultEncodingIsPC )
 375         label = wxMacMakeMacStringFromPC( title ) ;
 376     else
 377         label = title ;
 378     UMASetWTitleC( (WindowRef)m_macWindow , label ) ;
 379     ::CreateRootControl( (WindowRef)m_macWindow , (ControlHandle*)&m_macRootControl ) ;
 380     MacInstallEventHandler() ;
 381
 382     m_macFocus = NULL ;
 383 }
 384
 385 void wxTopLevelWindowMac::MacGetPortParams(WXPOINTPTR localOrigin, WXRECTPTR clipRect, WXHWND *window  , wxWindowMac** rootwin)
 386 {
 387     ((Point*)localOrigin)->h = 0;
 388     ((Point*)localOrigin)->v = 0;
 389     ((Rect*)clipRect)->left = 0;
 390     ((Rect*)clipRect)->top = 0;
 391     ((Rect*)clipRect)->right = m_width;
 392     ((Rect*)clipRect)->bottom = m_height;
 393     *window = m_macWindow ;
 394     *rootwin = this ;
 395 }
 396
 397 void wxTopLevelWindowMac::Clear()
 398 {
 399   wxWindow::Clear() ;
 400 }
 401
 402 WXWidget wxTopLevelWindowMac::MacGetContainerForEmbedding()
 403 {
 404     return m_macRootControl ;
 405 }
 406
 407
 408 void wxTopLevelWindowMac::MacUpdate( long timestamp)
 409 {
 410
 411     wxMacPortStateHelper help( (GrafPtr) GetWindowPort( (WindowRef) m_macWindow) ) ;
 412
 413     BeginUpdate( (WindowRef)m_macWindow ) ;
 414
 415     RgnHandle       updateRgn = NewRgn();
 416     RgnHandle       diffRgn = NewRgn() ;
 417     if ( updateRgn && diffRgn )
 418     {
 419         GetPortVisibleRegion( GetWindowPort( (WindowRef)m_macWindow ), updateRgn );
 420         DiffRgn( updateRgn , (RgnHandle) m_macNoEraseUpdateRgn , diffRgn ) ;
 421         if ( !EmptyRgn( updateRgn ) )
 422         {
 423             MacRedraw( updateRgn , timestamp , m_macNeedsErasing || !EmptyRgn( diffRgn )  ) ;
 424         }
 425     }
 426     if ( updateRgn )
 427         DisposeRgn( updateRgn );
 428     if ( diffRgn )
 429         DisposeRgn( diffRgn );
 430     EndUpdate( (WindowRef)m_macWindow ) ;
 431     SetEmptyRgn( (RgnHandle) m_macNoEraseUpdateRgn ) ;
 432     m_macNeedsErasing = false ;
 433 }
 434
 435
 436 // Raise the window to the top of the Z order
 437 void wxTopLevelWindowMac::Raise()
 438 {
 439     ::BringToFront( (WindowRef)m_macWindow ) ;
 440 }
 441
 442 // Lower the window to the bottom of the Z order
 443 void wxTopLevelWindowMac::Lower()
 444 {
 445     ::SendBehind( (WindowRef)m_macWindow , NULL ) ;
 446 }
 447
 448 void wxTopLevelWindowMac::MacFireMouseEvent( WXEVENTREF evr )
 449 {
 450     EventRecord *ev = (EventRecord*) evr ;
 451     wxMouseEvent event(wxEVT_LEFT_DOWN);
 452     bool isDown = !(ev->modifiers & btnState) ; // 1 is for up
 453     bool controlDown = ev->modifiers & controlKey ; // for simulating right mouse
 454
 455     event.m_leftDown = isDown && !controlDown;
 456
 457     event.m_middleDown = FALSE;
 458     event.m_rightDown = isDown && controlDown;
 459
 460     if ( ev->what == mouseDown )
 461     {
 462         if ( controlDown )
 463             event.SetEventType(wxEVT_RIGHT_DOWN ) ;
 464         else
 465             event.SetEventType(wxEVT_LEFT_DOWN ) ;
 466     }
 467     else if ( ev->what == mouseUp )
 468     {
 469         if ( controlDown )
 470             event.SetEventType(wxEVT_RIGHT_UP ) ;
 471         else
 472             event.SetEventType(wxEVT_LEFT_UP ) ;
 473     }
 474     else
 475     {
 476         event.SetEventType(wxEVT_MOTION ) ;
 477     }
 478
 479     event.m_shiftDown = ev->modifiers & shiftKey;
 480     event.m_controlDown = ev->modifiers & controlKey;
 481     event.m_altDown = ev->modifiers & optionKey;
 482     event.m_metaDown = ev->modifiers & cmdKey;
 483
 484     Point       localwhere = ev->where ;
 485
 486     GrafPtr     port ;
 487     ::GetPort( &port ) ;
 488     ::SetPort( UMAGetWindowPort( (WindowRef)m_macWindow ) ) ;
 489     ::GlobalToLocal( &localwhere ) ;
 490     ::SetPort( port ) ;
 491
 492     if ( ev->what == mouseDown )
 493     {
 494         if ( ev->when - gs_lastWhen <= GetDblTime() )
 495         {
 496             if ( abs( localwhere.h - gs_lastWhere.h ) < 3 && abs( localwhere.v - gs_lastWhere.v ) < 3 )
 497             {
 498                 // This is not right if the second mouse down
 499                 // event occured in a differen window. We
 500                 // correct this in MacDispatchMouseEvent.
 501                 if ( controlDown )
 502                     event.SetEventType(wxEVT_RIGHT_DCLICK ) ;
 503                 else
 504                     event.SetEventType(wxEVT_LEFT_DCLICK ) ;
 505             }
 506             gs_lastWhen = 0 ;
 507         }
 508         else
 509         {
 510             gs_lastWhen = ev->when ;
 511         }
 512         gs_lastWhere = localwhere ;
 513     }
 514
 515     event.m_x = localwhere.h;
 516     event.m_y = localwhere.v;
 517     event.m_x += m_x;
 518     event.m_y += m_y;
 519
 520     event.m_timeStamp = ev->when;
 521     event.SetEventObject(this);
 522     if ( wxTheApp->s_captureWindow )
 523     {
 524         int x = event.m_x ;
 525         int y = event.m_y ;
 526         wxTheApp->s_captureWindow->ScreenToClient( &x , &y ) ;
 527         event.m_x = x ;
 528         event.m_y = y ;
 529         event.SetEventObject( wxTheApp->s_captureWindow ) ;
 530         wxTheApp->s_captureWindow->GetEventHandler()->ProcessEvent( event ) ;
 531
 532         if ( ev->what == mouseUp )
 533         {
 534             wxTheApp->s_captureWindow = NULL ;
 535             if ( wxBusyCursorCount == 0 )
 536             {
 537                 m_cursor.MacInstall() ;
 538             }
 539         }
 540     }
 541     else
 542     {
 543         MacDispatchMouseEvent( event ) ;
 544     }
 545 }
 546
 547 void wxTopLevelWindowMac::MacMouseDown( WXEVENTREF ev , short part)
 548 {
 549     MacFireMouseEvent( ev ) ;
 550 }
 551
 552 void wxTopLevelWindowMac::MacMouseUp( WXEVENTREF ev , short part)
 553 {
 554     switch (part)
 555     {
 556         case inContent:
 557             {
 558                 MacFireMouseEvent( ev ) ;
 559             }
 560             break ;
 561     }
 562 }
 563
 564 void wxTopLevelWindowMac::MacMouseMoved( WXEVENTREF ev , short part)
 565 {
 566     switch (part)
 567     {
 568         case inContent:
 569             {
 570                 MacFireMouseEvent( ev ) ;
 571             }
 572             break ;
 573     }
 574 }
 575 void wxTopLevelWindowMac::MacActivate( WXEVENTREF ev , bool inIsActivating )
 576 {
 577     wxActivateEvent event(wxEVT_ACTIVATE, inIsActivating , m_windowId);
 578     event.m_timeStamp = ((EventRecord*)ev)->when ;
 579     event.SetEventObject(this);
 580
 581     GetEventHandler()->ProcessEvent(event);
 582
 583     UMAHighlightAndActivateWindow( (WindowRef)m_macWindow , inIsActivating ) ;
 584
 585     MacSuperEnabled( inIsActivating ) ;
 586 }
 587
 588 void wxTopLevelWindowMac::MacKeyDown( WXEVENTREF ev )
 589 {
 590 }
 591
 592 void wxTopLevelWindowMac::SetTitle(const wxString& title)
 593 {
 594     wxWindow::SetTitle( title ) ;
 595
 596     wxString label ;
 597
 598     if( wxApp::s_macDefaultEncodingIsPC )
 599         label = wxMacMakeMacStringFromPC( m_label ) ;
 600     else
 601         label = m_label ;
 602
 603     UMASetWTitleC( (WindowRef)m_macWindow , label ) ;
 604 }
 605
 606 bool wxTopLevelWindowMac::Show(bool show)
 607 {
 608     if ( !wxWindow::Show(show) )
 609         return FALSE;
 610
 611     if (show)
 612     {
 613       ::ShowWindow( (WindowRef)m_macWindow ) ;
 614       ::SelectWindow( (WindowRef)m_macWindow ) ;
 615       // no need to generate events here, they will get them triggered by macos
 616       // actually they should be , but apparently they are not
 617       wxSize size(m_width, m_height);
 618       wxSizeEvent event(size, m_windowId);
 619       event.SetEventObject(this);
 620       GetEventHandler()->ProcessEvent(event);
 621     }
 622     else
 623     {
 624       ::HideWindow( (WindowRef)m_macWindow ) ;
 625     }
 626
 627     if ( !show )
 628     {
 629     }
 630     else
 631     {
 632         Refresh() ;
 633     }
 634
 635     return TRUE;
 636 }
 637
 638 void wxTopLevelWindowMac::DoMoveWindow(int x, int y, int width, int height)
 639 {
 640     int former_x = m_x ;
 641     int former_y = m_y ;
 642     int former_w = m_width ;
 643     int former_h = m_height ;
 644
 645   int actualWidth = width;
 646   int actualHeight = height;
 647   int actualX = x;
 648   int actualY = y;
 649
 650     if ((m_minWidth != -1) && (actualWidth < m_minWidth))
 651         actualWidth = m_minWidth;
 652     if ((m_minHeight != -1) && (actualHeight < m_minHeight))
 653         actualHeight = m_minHeight;
 654     if ((m_maxWidth != -1) && (actualWidth > m_maxWidth))
 655         actualWidth = m_maxWidth;
 656     if ((m_maxHeight != -1) && (actualHeight > m_maxHeight))
 657         actualHeight = m_maxHeight;
 658
 659     bool doMove = false ;
 660     bool doResize = false ;
 661
 662     if ( actualX != former_x || actualY != former_y )
 663     {
 664         doMove = true ;
 665     }
 666     if ( actualWidth != former_w || actualHeight != former_h )
 667     {
 668         doResize = true ;
 669     }
 670
 671     if ( doMove || doResize )
 672     {
 673         m_x = actualX ;
 674         m_y = actualY ;
 675         m_width = actualWidth ;
 676         m_height = actualHeight ;
 677
 678         if ( doMove )
 679             ::MoveWindow((WindowRef)m_macWindow, m_x, m_y  , false); // don't make frontmost
 680
 681         if ( doResize )
 682             ::SizeWindow((WindowRef)m_macWindow, m_width, m_height  , true);
 683
 684         // the OS takes care of invalidating and erasing the new area
 685         // we have erased the old one
 686
 687         if ( IsKindOf( CLASSINFO( wxFrame ) ) )
 688         {
 689             wxFrame* frame = (wxFrame*) this ;
 690             frame->PositionStatusBar();
 691             frame->PositionToolBar();
 692         }
 693         if ( doMove )
 694             wxWindowMac::MacTopLevelWindowChangedPosition() ; // like this only children will be notified
 695
 696         MacRepositionScrollBars() ;
 697         if ( doMove )
 698         {
 699             wxPoint point(m_x, m_y);
 700             wxMoveEvent event(point, m_windowId);
 701             event.SetEventObject(this);
 702             GetEventHandler()->ProcessEvent(event) ;
 703         }
 704         if ( doResize )
 705         {
 706              MacRepositionScrollBars() ;
 707              wxSize size(m_width, m_height);
 708              wxSizeEvent event(size, m_windowId);
 709              event.SetEventObject(this);
 710              GetEventHandler()->ProcessEvent(event);
 711         }
 712     }
 713
 714 }
 715
 716 /*
 717  * Invalidation Mechanism
 718  *
 719  * The update mechanism reflects exactely the windows mechanism
 720  * the rect gets added to the window invalidate region, if the eraseBackground flag
 721  * has been true for any part of the update rgn the background is erased in the entire region
 722  * not just in the specified rect.
 723  *
 724  * In order to achive this, we also have an internal m_macNoEraseUpdateRgn, all rects that have
 725  * the eraseBackground flag set to false are also added to this rgn. upon receiving an update event
 726  * the update rgn is compared to the m_macNoEraseUpdateRgn and in case they differ, every window
 727  * will get the eraseBackground event first
 728  */
 729
 730 void wxTopLevelWindowMac::MacInvalidate( const WXRECTPTR rect, bool eraseBackground )
 731 {
 732   GrafPtr formerPort ;
 733   GetPort( &formerPort ) ;
 734   SetPortWindowPort( (WindowRef)m_macWindow ) ;
 735
 736   m_macNeedsErasing |= eraseBackground ;
 737
 738   // if we already know that we will have to erase, there's no need to track the rest
 739   if ( !m_macNeedsErasing)
 740   {
 741     // we end only here if eraseBackground is false
 742     // if we already have a difference between m_macNoEraseUpdateRgn and UpdateRgn
 743     // we will have to erase anyway
 744
 745     RgnHandle       updateRgn = NewRgn();
 746     RgnHandle       diffRgn = NewRgn() ;
 747     if ( updateRgn && diffRgn )
 748     {
 749         GetWindowUpdateRgn( (WindowRef)m_macWindow , updateRgn );
 750         Point pt = {0,0} ;
 751         LocalToGlobal( &pt ) ;
 752         OffsetRgn( updateRgn , -pt.h , -pt.v ) ;
 753         DiffRgn( updateRgn , (RgnHandle) m_macNoEraseUpdateRgn , diffRgn ) ;
 754         if ( !EmptyRgn( diffRgn ) )
 755         {
 756             m_macNeedsErasing = true ;
 757         }
 758     }
 759     if ( updateRgn )
 760         DisposeRgn( updateRgn );
 761     if ( diffRgn )
 762         DisposeRgn( diffRgn );
 763
 764     if ( !m_macNeedsErasing )
 765     {
 766       RgnHandle rectRgn = NewRgn() ;
 767       SetRectRgn( rectRgn , ((Rect*)rect)->left , ((Rect*)rect)->top , ((Rect*)rect)->right , ((Rect*)rect)->bottom ) ;
 768       UnionRgn( (RgnHandle) m_macNoEraseUpdateRgn , rectRgn , (RgnHandle) m_macNoEraseUpdateRgn ) ;
 769       DisposeRgn( rectRgn ) ;
 770     }
 771   }
 772   InvalWindowRect( (WindowRef)m_macWindow , (Rect*)rect ) ;
 773   // turn this on to debug the refreshing cycle
 774 #if wxMAC_DEBUG_REDRAW
 775   PaintRect( rect ) ;
 776 #endif
 777   SetPort( formerPort ) ;
 778 }
 779