src/mac/carbon/dnd.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dnd.cpp
   3 // Purpose:     wxDropTarget, wxDropSource, wxDataObject implementation
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dnd.h"
  14 #endif
  15
  16 #include "wx/defs.h"
  17
  18 #if wxUSE_DRAG_AND_DROP
  19
  20 #include "wx/dnd.h"
  21 #include "wx/window.h"
  22 #include "wx/toplevel.h"
  23 #include "wx/app.h"
  24 #include "wx/gdicmn.h"
  25 #include "wx/mac/private.h"
  26
  27 #ifndef __DARWIN__
  28     #include <Scrap.h>
  29 #endif
  30
  31 // ----------------------------------------------------------------------------
  32 // global
  33 // ----------------------------------------------------------------------------
  34
  35 void wxMacEnsureTrackingHandlersInstalled() ;
  36
  37 typedef struct
  38 {
  39     wxWindow* m_currentTargetWindow ;
  40     wxDropTarget* m_currentTarget ;
  41     wxDropSource* m_currentSource ;
  42 } MacTrackingGlobals ;
  43
  44 MacTrackingGlobals gTrackingGlobals ;
  45
  46 //----------------------------------------------------------------------------
  47 // wxDropTarget
  48 //----------------------------------------------------------------------------
  49
  50 wxDropTarget::wxDropTarget( wxDataObject *data )
  51             : wxDropTargetBase( data )
  52 {
  53     wxMacEnsureTrackingHandlersInstalled() ;
  54 }
  55
  56 wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
  57                                        wxCoord WXUNUSED(y),
  58                                        wxDragResult def )
  59 {
  60
  61     return CurrentDragHasSupportedFormat() ? def : wxDragNone;
  62 }
  63
  64 bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
  65 {
  66     if (!m_dataObject)
  67         return FALSE;
  68
  69     return CurrentDragHasSupportedFormat() ;
  70 }
  71
  72 wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  73                                    wxDragResult def )
  74 {
  75     if (!m_dataObject)
  76         return wxDragNone;
  77
  78     if (!CurrentDragHasSupportedFormat())
  79         return wxDragNone;
  80
  81     return GetData() ? def : wxDragNone;
  82 }
  83
  84 bool wxDropTarget::CurrentDragHasSupportedFormat()
  85 {
  86     bool supported = false ;
  87     if ( gTrackingGlobals.m_currentSource != NULL )
  88     {
  89         wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject() ;
  90
  91         if ( data )
  92         {
  93             size_t formatcount = data->GetFormatCount() ;
  94             wxDataFormat *array = new wxDataFormat[ formatcount  ];
  95             data->GetAllFormats( array );
  96             for (size_t i = 0; !supported && i < formatcount ; i++)
  97             {
  98                 wxDataFormat format = array[i] ;
  99                 if ( m_dataObject->IsSupported( format ) )
 100                 {
 101                     supported = true ;
 102                     break ;
 103                 }
 104             }
 105             delete[] array ;
 106         }
 107     }
 108     if ( !supported )
 109     {
 110         UInt16 items ;
 111         OSErr result;
 112         CountDragItems((DragReference)m_currentDrag, &items);
 113         for (UInt16 index = 1; index <= items && supported == false ; ++index)
 114         {
 115             ItemReference theItem;
 116             FlavorType theType ;
 117             UInt16 flavors = 0 ;
 118             GetDragItemReferenceNumber((DragReference)m_currentDrag, index, &theItem);
 119             CountDragItemFlavors( (DragReference)m_currentDrag, theItem , &flavors ) ;
 120             for ( UInt16 flavor = 1 ; flavor <= flavors ; ++flavor )
 121             {
 122                 result = GetFlavorType((DragReference)m_currentDrag, theItem, flavor , &theType);
 123                 if ( m_dataObject->IsSupportedFormat( wxDataFormat( theType ) ) )
 124                 {
 125                     supported = true ;
 126                     break ;
 127                 }
 128             }
 129         }
 130     }
 131     return supported ;
 132 }
 133
 134 bool wxDropTarget::GetData()
 135 {
 136     if (!m_dataObject)
 137         return FALSE;
 138
 139     if ( !CurrentDragHasSupportedFormat() )
 140         return FALSE ;
 141
 142     bool transferred = false ;
 143     if ( gTrackingGlobals.m_currentSource != NULL )
 144     {
 145         wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject() ;
 146
 147         if ( data )
 148         {
 149             size_t formatcount = data->GetFormatCount() ;
 150             wxDataFormat *array = new wxDataFormat[ formatcount  ];
 151             data->GetAllFormats( array );
 152             for (size_t i = 0; !transferred && i < formatcount ; i++)
 153             {
 154                 wxDataFormat format = array[i] ;
 155                 if ( m_dataObject->IsSupported( format ) )
 156                 {
 157                     int size = data->GetDataSize( format );
 158                     transferred = true ;
 159
 160                     if (size == 0)
 161                     {
 162                         m_dataObject->SetData(format , 0 , 0 ) ;
 163                     }
 164                     else
 165                     {
 166                         char *d = new char[size];
 167                         data->GetDataHere( format , (void*) d );
 168                         m_dataObject->SetData( format , size , d ) ;
 169                         delete[] d ;
 170                     }
 171                 }
 172             }
 173             delete[] array ;
 174         }
 175     }
 176     if ( !transferred )
 177     {
 178         UInt16 items ;
 179         OSErr result;
 180         bool firstFileAdded = false ;
 181         CountDragItems((DragReference)m_currentDrag, &items);
 182         for (UInt16 index = 1; index <= items; ++index)
 183         {
 184             ItemReference theItem;
 185             FlavorType theType ;
 186             UInt16 flavors = 0 ;
 187             GetDragItemReferenceNumber((DragReference)m_currentDrag, index, &theItem);
 188             CountDragItemFlavors( (DragReference)m_currentDrag, theItem , &flavors ) ;
 189             for ( UInt16 flavor = 1 ; flavor <= flavors ; ++flavor )
 190             {
 191                 result = GetFlavorType((DragReference)m_currentDrag, theItem, flavor , &theType);
 192                 wxDataFormat format(theType) ;
 193                 if ( m_dataObject->IsSupportedFormat( format ) )
 194                 {
 195                     FlavorFlags theFlags;
 196                     result = GetFlavorFlags((DragReference)m_currentDrag, theItem, theType, &theFlags);
 197                     if (result == noErr)
 198                     {
 199                         Size dataSize ;
 200                         Ptr theData ;
 201                         GetFlavorDataSize((DragReference)m_currentDrag, theItem, theType, &dataSize);
 202                         if ( theType == kScrapFlavorTypeText )
 203                         {
 204                             // this increment is only valid for allocating, on the next GetFlavorData
 205                             // call it is reset again to the original value
 206                             dataSize++ ;
 207                         }
 208                         else if ( theType == kScrapFlavorTypeUnicode )
 209                         {
 210                             // this increment is only valid for allocating, on the next GetFlavorData
 211                             // call it is reset again to the original value
 212                             dataSize++ ;
 213                             dataSize++ ;
 214                         }
 215                         theData = new char[dataSize];
 216                         GetFlavorData((DragReference)m_currentDrag, theItem, theType, (void*) theData, &dataSize, 0L);
 217                         if( theType == kScrapFlavorTypeText )
 218                         {
 219                             theData[dataSize]=0 ;
 220                             m_dataObject->SetData( wxDataFormat(wxDF_TEXT), dataSize , theData );
 221                         }
 222  #if wxUSE_UNICODE
 223                         else if ( theType == kScrapFlavorTypeUnicode )
 224                         {
 225                             theData[dataSize]=0 ;
 226                             theData[dataSize+1]=0 ;
 227                             m_dataObject->SetData( wxDataFormat(wxDF_UNICODETEXT), dataSize , theData );
 228                         }
 229  #endif
 230                         else if ( theType == kDragFlavorTypeHFS )
 231                         {
 232                             HFSFlavor* theFile = (HFSFlavor*) theData ;
 233                             wxString name = wxMacFSSpec2MacFilename( &theFile->fileSpec ) ;
 234                             if ( !firstFileAdded )
 235                             {
 236                                 // reset file list
 237                                 ((wxFileDataObject*)m_dataObject)->SetData( 0 , "" ) ;
 238                                 firstFileAdded = true ;
 239                             }
 240                             ((wxFileDataObject*)m_dataObject)->AddFile( name ) ;
 241                         }
 242                         else
 243                         {
 244                             m_dataObject->SetData( format, dataSize, theData );
 245                         }
 246                         delete[] theData;
 247                     }
 248                     break ;
 249                 }
 250             }
 251         }
 252     }
 253     return TRUE ;
 254 }
 255
 256 //-------------------------------------------------------------------------
 257 // wxDropSource
 258 //-------------------------------------------------------------------------
 259
 260 //-----------------------------------------------------------------------------
 261 // drag request
 262
 263 wxDropSource::wxDropSource(wxWindow *win,
 264                            const wxCursor &cursorCopy,
 265                            const wxCursor &cursorMove,
 266                            const wxCursor &cursorStop)
 267             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 268 {
 269     wxMacEnsureTrackingHandlersInstalled() ;
 270     m_window = win;
 271 }
 272
 273 wxDropSource::wxDropSource(wxDataObject& data,
 274                            wxWindow *win,
 275                            const wxCursor &cursorCopy,
 276                            const wxCursor &cursorMove,
 277                            const wxCursor &cursorStop)
 278             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 279 {
 280     wxMacEnsureTrackingHandlersInstalled() ;
 281     SetData( data );
 282     m_window = win;
 283 }
 284
 285 wxDropSource::~wxDropSource()
 286 {
 287 }
 288
 289
 290 wxDragResult wxDropSource::DoDragDrop(int WXUNUSED(flags))
 291 {
 292     wxASSERT_MSG( m_data, wxT("Drop source: no data") );
 293
 294     if (!m_data)
 295         return (wxDragResult) wxDragNone;
 296
 297     if (m_data->GetFormatCount() == 0)
 298         return (wxDragResult) wxDragNone;
 299
 300     OSErr result;
 301     DragReference theDrag;
 302     RgnHandle dragRegion;
 303     if ((result = NewDrag(&theDrag)))
 304     {
 305         return wxDragNone ;
 306     }
 307     // add data to drag
 308     size_t formatCount = m_data->GetFormatCount() ;
 309     wxDataFormat *formats = new wxDataFormat[formatCount] ;
 310     m_data->GetAllFormats( formats ) ;
 311     ItemReference theItem = 1 ;
 312     for ( size_t i = 0 ; i < formatCount ; ++i )
 313     {
 314         size_t dataSize = m_data->GetDataSize( formats[i] ) ;
 315         Ptr dataPtr = new char[dataSize] ;
 316         m_data->GetDataHere( formats[i] , dataPtr ) ;
 317         OSType type = formats[i].GetFormatId() ;
 318         if ( type == 'TEXT' )
 319         {
 320             dataSize-- ;
 321             dataPtr[ dataSize ] = 0 ;
 322             wxString st( (wxChar*) dataPtr ) ;
 323             wxCharBuffer buf = st.mb_str( wxConvLocal) ;
 324             AddDragItemFlavor(theDrag, theItem, type , buf.data(), strlen(buf), 0);
 325         }
 326         else if (type == kDragFlavorTypeHFS )
 327         {
 328             HFSFlavor  theFlavor ;
 329             OSErr err = noErr;
 330             CInfoPBRec cat;
 331
 332             wxMacFilename2FSSpec( dataPtr , &theFlavor.fileSpec ) ;
 333
 334             cat.hFileInfo.ioNamePtr = theFlavor.fileSpec.name;
 335             cat.hFileInfo.ioVRefNum = theFlavor.fileSpec.vRefNum;
 336             cat.hFileInfo.ioDirID = theFlavor.fileSpec.parID;
 337             cat.hFileInfo.ioFDirIndex = 0;
 338             err = PBGetCatInfoSync(&cat);
 339             if (err == noErr )
 340             {
 341                 theFlavor.fdFlags = cat.hFileInfo.ioFlFndrInfo.fdFlags;
 342                 if (theFlavor.fileSpec.parID == fsRtParID) {
 343                     theFlavor.fileCreator = 'MACS';
 344                     theFlavor.fileType = 'disk';
 345                 } else if ((cat.hFileInfo.ioFlAttrib & ioDirMask) != 0) {
 346                     theFlavor.fileCreator = 'MACS';
 347                     theFlavor.fileType = 'fold';
 348                 } else {
 349                     theFlavor.fileCreator = cat.hFileInfo.ioFlFndrInfo.fdCreator;
 350                     theFlavor.fileType = cat.hFileInfo.ioFlFndrInfo.fdType;
 351                 }
 352                 AddDragItemFlavor(theDrag, theItem, type , &theFlavor, sizeof(theFlavor), 0);
 353             }
 354         }
 355         else
 356         {
 357             AddDragItemFlavor(theDrag, theItem, type , dataPtr, dataSize, 0);
 358         }
 359         delete[] dataPtr ;
 360     }
 361     delete[] formats ;
 362
 363     dragRegion = NewRgn();
 364     RgnHandle tempRgn = NewRgn() ;
 365
 366     EventRecord* ev = NULL ;
 367 #if !TARGET_CARBON // TODO
 368     ev = (EventRecord*) wxTheApp->MacGetCurrentEvent() ;
 369 #else
 370     EventRecord rec ;
 371     ev = &rec ;
 372     wxMacConvertEventToRecord( (EventRef) wxTheApp->MacGetCurrentEvent() , &rec ) ;
 373 #endif
 374     const short dragRegionOuterBoundary = 10 ;
 375     const short dragRegionInnerBoundary = 9 ;
 376
 377     SetRectRgn( dragRegion , ev->where.h - dragRegionOuterBoundary ,
 378         ev->where.v  - dragRegionOuterBoundary ,
 379         ev->where.h + dragRegionOuterBoundary ,
 380         ev->where.v + dragRegionOuterBoundary ) ;
 381
 382     SetRectRgn( tempRgn , ev->where.h - dragRegionInnerBoundary ,
 383         ev->where.v  - dragRegionInnerBoundary ,
 384         ev->where.h + dragRegionInnerBoundary ,
 385         ev->where.v + dragRegionInnerBoundary ) ;
 386
 387     DiffRgn( dragRegion , tempRgn , dragRegion ) ;
 388     DisposeRgn( tempRgn ) ;
 389
 390     // TODO:work with promises in order to return data only when drag
 391     // was successfully completed
 392
 393     gTrackingGlobals.m_currentSource = this ;
 394     result = TrackDrag(theDrag, ev , dragRegion);
 395     DisposeRgn(dragRegion);
 396     DisposeDrag(theDrag);
 397     gTrackingGlobals.m_currentSource = NULL ;
 398
 399     KeyMap keymap;
 400     GetKeys(keymap);
 401     bool optionDown = keymap[1] & 4;
 402     wxDragResult dndresult = optionDown ? wxDragCopy : wxDragMove;
 403     return dndresult;
 404 }
 405
 406 bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
 407 {
 408     const wxCursor& cursor = GetCursor(effect);
 409     if ( cursor.Ok() )
 410     {
 411         cursor.MacInstall() ;
 412
 413         return TRUE;
 414     }
 415     else
 416     {
 417         return FALSE;
 418     }
 419 }
 420
 421 bool gTrackingGlobalsInstalled = false ;
 422
 423 // passing the globals via refcon is not needed by the CFM and later architectures anymore
 424 // but I'll leave it in there, just in case...
 425
 426 pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
 427   void *handlerRefCon, DragReference theDrag) ;
 428 pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
 429 DragReference theDrag) ;
 430
 431 void wxMacEnsureTrackingHandlersInstalled()
 432 {
 433     if( !gTrackingGlobalsInstalled )
 434     {
 435         OSErr result;
 436
 437         result = InstallTrackingHandler(NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L,&gTrackingGlobals);
 438         wxASSERT( result == noErr ) ;
 439         result = InstallReceiveHandler(NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals);
 440         wxASSERT( result == noErr ) ;
 441
 442         gTrackingGlobalsInstalled = true ;
 443     }
 444 }
 445
 446 pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
 447   void *handlerRefCon, DragReference theDrag)
 448 {
 449     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
 450     Point mouse, localMouse;
 451     DragAttributes attributes;
 452     GetDragAttributes(theDrag, &attributes);
 453     wxTopLevelWindowMac* toplevel = wxFindWinFromMacWindow( theWindow ) ;
 454
 455     KeyMap keymap;
 456     GetKeys(keymap);
 457     bool optionDown = keymap[1] & 4;
 458     wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 459
 460     switch(theMessage)
 461     {
 462         case kDragTrackingEnterHandler:
 463             break;
 464         case kDragTrackingLeaveHandler:
 465             break;
 466         case kDragTrackingEnterWindow:
 467             trackingGlobals->m_currentTargetWindow = NULL ;
 468             trackingGlobals->m_currentTarget = NULL ;
 469             break;
 470         case kDragTrackingInWindow:
 471             if (toplevel == NULL)
 472                 break;
 473
 474             GetDragMouse(theDrag, &mouse, 0L);
 475             localMouse = mouse;
 476             GlobalToLocal(&localMouse);
 477
 478
 479
 480 //            if (attributes & kDragHasLeftSenderWindow)
 481             {
 482                 wxPoint point(localMouse.h , localMouse.v) ;
 483                 wxWindow *win = NULL ;
 484                 ControlPartCode controlPart ;
 485                 ControlRef control = wxMacFindControlUnderMouse( localMouse ,
 486                     theWindow , &controlPart ) ;
 487                 if ( control )
 488                     win = wxFindControlFromMacControl( control ) ;
 489                 // TODO toplevel->MacGetWindowFromPointSub( point , &win ) ;
 490                 int localx , localy ;
 491                 localx = localMouse.h ;
 492                 localy = localMouse.v ;
 493                 //TODO : should we use client coordinates
 494                 if ( win )
 495                     win->MacRootWindowToWindow( &localx , &localy ) ;
 496                 if ( win != trackingGlobals->m_currentTargetWindow )
 497                 {
 498                     if ( trackingGlobals->m_currentTargetWindow )
 499                     {
 500                         // this window is left
 501                         if ( trackingGlobals->m_currentTarget )
 502                         {
 503                             HideDragHilite(theDrag);
 504                             trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 505                             trackingGlobals->m_currentTarget->OnLeave() ;
 506                             trackingGlobals->m_currentTarget = NULL;
 507                             trackingGlobals->m_currentTargetWindow = NULL ;
 508                         }
 509                     }
 510                     if ( win )
 511                     {
 512                         // this window is entered
 513                         trackingGlobals->m_currentTargetWindow = win ;
 514                         trackingGlobals->m_currentTarget = win->GetDropTarget() ;
 515                         {
 516
 517                                 if ( trackingGlobals->m_currentTarget )
 518                                 {
 519                                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 520                                 result = trackingGlobals->m_currentTarget->OnEnter(
 521                                         localx , localy , result ) ;
 522                             }
 523
 524
 525                             if ( result != wxDragNone )
 526                             {
 527                                 int x , y ;
 528                                 x = y = 0 ;
 529                                 win->MacWindowToRootWindow( &x , &y ) ;
 530                                 RgnHandle hiliteRgn = NewRgn() ;
 531                                 Rect r = { y , x , y+win->GetSize().y , x+win->GetSize().x } ;
 532                                 RectRgn( hiliteRgn , &r ) ;
 533                                 ShowDragHilite(theDrag, hiliteRgn, true);
 534                                 DisposeRgn( hiliteRgn ) ;
 535                             }
 536                         }
 537                     }
 538                 }
 539                 else
 540                 {
 541                     if( trackingGlobals->m_currentTarget )
 542                     {
 543                         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 544                         trackingGlobals->m_currentTarget->OnDragOver(
 545                             localx , localy , result ) ;
 546                     }
 547                 }
 548
 549                 // set cursor for OnEnter and OnDragOver
 550                 if ( trackingGlobals->m_currentSource && trackingGlobals->m_currentSource->GiveFeedback( result ) == FALSE )
 551                 {
 552                   if ( trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) == FALSE )
 553                   {
 554                       switch( result )
 555                       {
 556                           case wxDragCopy :
 557                               {
 558                                   wxCursor cursor(wxCURSOR_COPY_ARROW) ;
 559                                   cursor.MacInstall() ;
 560                               }
 561                               break ;
 562                           case wxDragMove :
 563                               {
 564                                   wxCursor cursor(wxCURSOR_ARROW) ;
 565                                   cursor.MacInstall() ;
 566                               }
 567                               break ;
 568                           case wxDragNone :
 569                               {
 570                                   wxCursor cursor(wxCURSOR_NO_ENTRY) ;
 571                                   cursor.MacInstall() ;
 572                               }
 573                               break ;
 574
 575                           case wxDragError:
 576                           case wxDragLink:
 577                           case wxDragCancel:
 578                               // put these here to make gcc happy
 579                               ;
 580                       }
 581                   }
 582                 }
 583
 584           }
 585             // MyTrackItemUnderMouse(localMouse, theWindow);
 586             break;
 587         case kDragTrackingLeaveWindow:
 588             if (trackingGlobals->m_currentTarget)
 589             {
 590                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 591                 trackingGlobals->m_currentTarget->OnLeave() ;
 592                 HideDragHilite(theDrag);
 593                 trackingGlobals->m_currentTarget = NULL ;
 594             }
 595             trackingGlobals->m_currentTargetWindow = NULL ;
 596             break;
 597     }
 598     return(noErr);
 599 }
 600
 601 pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow,
 602                                            void *handlerRefCon,
 603                                            DragReference theDrag)
 604 {
 605     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
 606     if ( trackingGlobals->m_currentTarget )
 607     {
 608         Point mouse,localMouse ;
 609         int localx,localy ;
 610
 611         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 612         GetDragMouse(theDrag, &mouse, 0L);
 613         localMouse = mouse;
 614         GlobalToLocal(&localMouse);
 615         localx = localMouse.h ;
 616         localy = localMouse.v ;
 617         //TODO : should we use client coordinates
 618         if ( trackingGlobals->m_currentTargetWindow )
 619             trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx , &localy ) ;
 620         if ( trackingGlobals->m_currentTarget->OnDrop( localx , localy ) )
 621         {
 622             KeyMap keymap;
 623             GetKeys(keymap);
 624             bool optionDown = keymap[1] & 4;
 625             wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 626             trackingGlobals->m_currentTarget->OnData( localx , localy , result ) ;
 627         }
 628     }
 629     return(noErr);
 630 }
 631 #endif