src/mac/carbon/dnd.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dnd.cpp
   3 // Purpose:     wxDropTarget, wxDropSource implementations
   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 #include "wx/wxprec.h"
  13
  14 #if wxUSE_DRAG_AND_DROP
  15
  16 #include "wx/dnd.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/app.h"
  20     #include "wx/window.h"
  21     #include "wx/toplevel.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/gdicmn.h"
  25 #include "wx/mac/private.h"
  26
  27 #ifndef __DARWIN__
  28     #include <Scrap.h>
  29 #endif
  30
  31
  32 // ----------------------------------------------------------------------------
  33 // globals
  34 // ----------------------------------------------------------------------------
  35
  36 typedef struct
  37 {
  38     wxWindow *m_currentTargetWindow;
  39     wxDropTarget *m_currentTarget;
  40     wxDropSource *m_currentSource;
  41 }
  42 MacTrackingGlobals;
  43
  44 MacTrackingGlobals gTrackingGlobals;
  45
  46 void wxMacEnsureTrackingHandlersInstalled();
  47
  48 //----------------------------------------------------------------------------
  49 // wxDropTarget
  50 //----------------------------------------------------------------------------
  51
  52 wxDropTarget::wxDropTarget( wxDataObject *data )
  53             : wxDropTargetBase( data )
  54 {
  55     wxMacEnsureTrackingHandlersInstalled();
  56 }
  57
  58 wxDragResult wxDropTarget::OnDragOver(
  59     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  60     wxDragResult def )
  61 {
  62     return CurrentDragHasSupportedFormat() ? def : wxDragNone;
  63 }
  64
  65 bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
  66 {
  67     if (m_dataObject == NULL)
  68         return false;
  69
  70     return CurrentDragHasSupportedFormat();
  71 }
  72
  73 wxDragResult wxDropTarget::OnData(
  74     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  75     wxDragResult def )
  76 {
  77     if (m_dataObject == NULL)
  78         return wxDragNone;
  79
  80     if (!CurrentDragHasSupportedFormat())
  81         return wxDragNone;
  82
  83     return GetData() ? def : wxDragNone;
  84 }
  85
  86 bool wxDropTarget::CurrentDragHasSupportedFormat()
  87 {
  88     bool supported = false;
  89
  90     if ( gTrackingGlobals.m_currentSource != NULL )
  91     {
  92         wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
  93
  94         if ( data )
  95         {
  96             size_t formatcount = data->GetFormatCount();
  97             wxDataFormat *array = new wxDataFormat[formatcount];
  98             data->GetAllFormats( array );
  99             for (size_t i = 0; !supported && i < formatcount; i++)
 100             {
 101                 wxDataFormat format = array[i];
 102                 if ( m_dataObject->IsSupported( format ) )
 103                 {
 104                     supported = true;
 105                     break;
 106                 }
 107             }
 108
 109             delete [] array;
 110         }
 111     }
 112
 113     if ( !supported )
 114     {
 115         UInt16 items;
 116         OSErr result;
 117         ItemReference theItem;
 118         FlavorType theType;
 119         UInt16 flavors = 0;
 120
 121         CountDragItems( (DragReference)m_currentDrag, &items );
 122         for (UInt16 index = 1; index <= items && !supported; ++index)
 123         {
 124             flavors = 0;
 125             GetDragItemReferenceNumber( (DragReference)m_currentDrag, index, &theItem );
 126             CountDragItemFlavors( (DragReference)m_currentDrag, theItem, &flavors );
 127
 128             for ( UInt16 flavor = 1; flavor <= flavors; ++flavor )
 129             {
 130                 result = GetFlavorType( (DragReference)m_currentDrag, theItem, flavor, &theType );
 131                 if ( m_dataObject->IsSupportedFormat( wxDataFormat( theType ) ) )
 132                 {
 133                     supported = true;
 134                     break;
 135                 }
 136             }
 137         }
 138     }
 139
 140     return supported;
 141 }
 142
 143 bool wxDropTarget::GetData()
 144 {
 145     if (m_dataObject == NULL)
 146         return false;
 147
 148     if ( !CurrentDragHasSupportedFormat() )
 149         return false;
 150
 151     bool transferred = false;
 152     if ( gTrackingGlobals.m_currentSource != NULL )
 153     {
 154         wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject();
 155
 156         if (data != NULL)
 157         {
 158             size_t formatcount = data->GetFormatCount();
 159             wxDataFormat *array = new wxDataFormat[formatcount];
 160             data->GetAllFormats( array );
 161             for (size_t i = 0; !transferred && i < formatcount; i++)
 162             {
 163                 wxDataFormat format = array[i];
 164                 if ( m_dataObject->IsSupported( format ) )
 165                 {
 166                     int size = data->GetDataSize( format );
 167                     transferred = true;
 168
 169                     if (size == 0)
 170                     {
 171                         m_dataObject->SetData( format, 0, 0 );
 172                     }
 173                     else
 174                     {
 175                         char *d = new char[size];
 176                         data->GetDataHere( format, (void*)d );
 177                         m_dataObject->SetData( format, size, d );
 178                         delete [] d;
 179                     }
 180                 }
 181             }
 182
 183             delete [] array;
 184         }
 185     }
 186
 187     if ( !transferred )
 188     {
 189         UInt16 items;
 190         OSErr result;
 191         ItemReference theItem;
 192         FlavorType theType;
 193         FlavorFlags theFlags;
 194         UInt16 flavors;
 195         wxString filenamesPassed;
 196
 197         CountDragItems( (DragReference)m_currentDrag, &items );
 198         for (UInt16 index = 1; index <= items; ++index)
 199         {
 200             flavors = 0;
 201             GetDragItemReferenceNumber( (DragReference)m_currentDrag, index, &theItem );
 202             CountDragItemFlavors( (DragReference)m_currentDrag, theItem, &flavors );
 203             wxDataFormat preferredFormat = m_dataObject->GetPreferredFormat( wxDataObject::Set );
 204             bool hasPreferredFormat = false;
 205
 206             for (UInt16 flavor = 1; flavor <= flavors; ++flavor)
 207             {
 208                 result = GetFlavorType( (DragReference)m_currentDrag, theItem, flavor, &theType );
 209                 wxDataFormat format( theType );
 210                 if (preferredFormat == format)
 211                 {
 212                     hasPreferredFormat = true;
 213                     break;
 214                 }
 215             }
 216
 217             for (UInt16 flavor = 1; flavor <= flavors; ++flavor)
 218             {
 219                 result = GetFlavorType( (DragReference)m_currentDrag, theItem, flavor, &theType );
 220                 wxDataFormat format( theType );
 221                 if ((hasPreferredFormat && format == preferredFormat)
 222                     || (!hasPreferredFormat && m_dataObject->IsSupportedFormat( format )))
 223                 {
 224                     result = GetFlavorFlags( (DragReference)m_currentDrag, theItem, theType, &theFlags );
 225                     if (result == noErr)
 226                     {
 227                         Size dataSize;
 228                         Ptr theData;
 229
 230                         GetFlavorDataSize( (DragReference)m_currentDrag, theItem, theType, &dataSize );
 231                         if (theType == kScrapFlavorTypeText)
 232                         {
 233                             // this increment is only valid for allocating:
 234                             // on the next GetFlavorData call it is reset again to the original value
 235                             dataSize++;
 236                         }
 237                         else if (theType == kScrapFlavorTypeUnicode)
 238                         {
 239                             // this increment is only valid for allocating:
 240                             // on the next GetFlavorData call it is reset again to the original value
 241                             dataSize++;
 242                             dataSize++;
 243                         }
 244
 245                         if (dataSize > 0)
 246                             theData = new char[dataSize];
 247                         else
 248                             theData = NULL;
 249
 250                         GetFlavorData( (DragReference)m_currentDrag, theItem, theType, (void*)theData, &dataSize, 0L );
 251                         switch (theType)
 252                         {
 253                         case kScrapFlavorTypeText:
 254                             theData[dataSize] = 0;
 255                             m_dataObject->SetData( wxDataFormat(wxDF_TEXT), dataSize, theData );
 256                             break;
 257
 258 #if wxUSE_UNICODE
 259                         case kScrapFlavorTypeUnicode:
 260                             theData[dataSize + 0] =
 261                             theData[dataSize + 1] = 0;
 262                             m_dataObject->SetData( wxDataFormat(wxDF_UNICODETEXT), dataSize, theData );
 263                             break;
 264 #endif
 265
 266                         case kDragFlavorTypeHFS:
 267                             if (theData != NULL)
 268                             {
 269                                 HFSFlavor* theFile = (HFSFlavor*)theData;
 270                                 wxString name = wxMacFSSpec2MacFilename( &theFile->fileSpec );
 271
 272                                 if (!name.empty())
 273                                     filenamesPassed += name + wxT("\n");
 274                             }
 275                             break;
 276
 277                         default:
 278                             m_dataObject->SetData( format, dataSize, theData );
 279                             break;
 280                         }
 281
 282                         delete [] theData;
 283                     }
 284                     break;
 285                 }
 286             }
 287         }
 288
 289         if (filenamesPassed.length() > 0)
 290         {
 291             wxCharBuffer buf = filenamesPassed.fn_str();
 292             m_dataObject->SetData( wxDataFormat(wxDF_FILENAME), strlen( buf ), (const char*)buf );
 293         }
 294     }
 295
 296     return true;
 297 }
 298
 299 //-------------------------------------------------------------------------
 300 // wxDropSource
 301 //-------------------------------------------------------------------------
 302
 303 //-----------------------------------------------------------------------------
 304 // drag request
 305
 306 wxDropSource::wxDropSource(wxWindow *win,
 307                            const wxCursor &cursorCopy,
 308                            const wxCursor &cursorMove,
 309                            const wxCursor &cursorStop)
 310             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 311 {
 312     wxMacEnsureTrackingHandlersInstalled();
 313
 314     m_window = win;
 315 }
 316
 317 wxDropSource::wxDropSource(wxDataObject& data,
 318                            wxWindow *win,
 319                            const wxCursor &cursorCopy,
 320                            const wxCursor &cursorMove,
 321                            const wxCursor &cursorStop)
 322             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 323 {
 324     wxMacEnsureTrackingHandlersInstalled();
 325
 326     SetData( data );
 327     m_window = win;
 328 }
 329
 330 wxDropSource::~wxDropSource()
 331 {
 332 }
 333
 334 wxDragResult wxDropSource::DoDragDrop(int flags)
 335 {
 336     wxASSERT_MSG( m_data, wxT("Drop source: no data") );
 337
 338     if ((m_data == NULL) || (m_data->GetFormatCount() == 0))
 339         return (wxDragResult)wxDragNone;
 340
 341     OSStatus result;
 342     DragReference theDrag;
 343     RgnHandle dragRegion;
 344
 345     if ((result = NewDrag( &theDrag )) != noErr)
 346         return wxDragNone;
 347
 348     // add data to drag
 349     size_t formatCount = m_data->GetFormatCount();
 350     wxDataFormat *formats = new wxDataFormat[formatCount];
 351     m_data->GetAllFormats( formats );
 352     ItemReference theItem = 1;
 353
 354     for ( size_t i = 0; i < formatCount; ++i )
 355     {
 356         size_t dataSize = m_data->GetDataSize( formats[i] );
 357         Ptr dataPtr = new char[dataSize];
 358         m_data->GetDataHere( formats[i], dataPtr );
 359         OSType type = formats[i].GetFormatId();
 360         if ( type == 'TEXT' || type == 'utxt' )
 361         {
 362             if ( dataSize > 0 )
 363                 dataSize--;
 364             dataPtr[ dataSize ] = 0;
 365             if ( type == 'utxt' )
 366             {
 367                 if ( dataSize > 0 )
 368                     dataSize--;
 369                 dataPtr[ dataSize ] = 0;
 370             }
 371
 372             AddDragItemFlavor( theDrag, theItem, type, dataPtr, dataSize, 0 );
 373         }
 374         else if (type == kDragFlavorTypeHFS )
 375         {
 376             HFSFlavor  theFlavor;
 377             OSErr err = noErr;
 378             CInfoPBRec cat;
 379
 380             wxMacFilename2FSSpec( wxString( dataPtr, *wxConvCurrent ), &theFlavor.fileSpec );
 381
 382             memset( &cat, 0, sizeof(cat) );
 383             cat.hFileInfo.ioNamePtr = theFlavor.fileSpec.name;
 384             cat.hFileInfo.ioVRefNum = theFlavor.fileSpec.vRefNum;
 385             cat.hFileInfo.ioDirID = theFlavor.fileSpec.parID;
 386             cat.hFileInfo.ioFDirIndex = 0;
 387             err = PBGetCatInfoSync( &cat );
 388             if (err == noErr)
 389             {
 390                 theFlavor.fdFlags = cat.hFileInfo.ioFlFndrInfo.fdFlags;
 391                 if (theFlavor.fileSpec.parID == fsRtParID)
 392                 {
 393                     theFlavor.fileCreator = 'MACS';
 394                     theFlavor.fileType = 'disk';
 395                 }
 396                 else if ((cat.hFileInfo.ioFlAttrib & ioDirMask) != 0)
 397                 {
 398                     theFlavor.fileCreator = 'MACS';
 399                     theFlavor.fileType = 'fold';
 400                 }
 401                 else
 402                 {
 403                     theFlavor.fileCreator = cat.hFileInfo.ioFlFndrInfo.fdCreator;
 404                     theFlavor.fileType = cat.hFileInfo.ioFlFndrInfo.fdType;
 405                 }
 406
 407                 AddDragItemFlavor( theDrag, theItem, type, &theFlavor, sizeof(theFlavor), 0 );
 408             }
 409         }
 410         else
 411         {
 412             AddDragItemFlavor( theDrag, theItem, type, dataPtr, dataSize, 0 );
 413         }
 414
 415         delete [] dataPtr;
 416     }
 417
 418     delete [] formats;
 419
 420     dragRegion = NewRgn();
 421     RgnHandle tempRgn = NewRgn();
 422
 423     EventRecord* ev = NULL;
 424
 425 #if !TARGET_CARBON // TODO
 426     ev = (EventRecord*) wxTheApp->MacGetCurrentEvent();
 427 #else
 428     EventRecord rec;
 429     ev = &rec;
 430     wxMacConvertEventToRecord( (EventRef) wxTheApp->MacGetCurrentEvent(), &rec );
 431 #endif
 432
 433     const short dragRegionOuterBoundary = 10;
 434     const short dragRegionInnerBoundary = 9;
 435
 436     SetRectRgn(
 437         dragRegion,
 438         ev->where.h - dragRegionOuterBoundary,
 439         ev->where.v  - dragRegionOuterBoundary,
 440         ev->where.h + dragRegionOuterBoundary,
 441         ev->where.v + dragRegionOuterBoundary );
 442
 443     SetRectRgn(
 444         tempRgn,
 445         ev->where.h - dragRegionInnerBoundary,
 446         ev->where.v - dragRegionInnerBoundary,
 447         ev->where.h + dragRegionInnerBoundary,
 448         ev->where.v + dragRegionInnerBoundary );
 449
 450     DiffRgn( dragRegion, tempRgn, dragRegion );
 451     DisposeRgn( tempRgn );
 452
 453     // TODO: work with promises in order to return data
 454     // only when drag was successfully completed
 455
 456     gTrackingGlobals.m_currentSource = this;
 457     result = TrackDrag( theDrag, ev, dragRegion );
 458     DisposeRgn( dragRegion );
 459     DisposeDrag( theDrag );
 460     gTrackingGlobals.m_currentSource = NULL;
 461
 462     bool optionDown = GetCurrentKeyModifiers() & optionKey;
 463     wxDragResult dndresult = wxDragCopy;
 464     if ( flags != wxDrag_CopyOnly )
 465         // on mac the option key is always the indication for copy
 466         dndresult = optionDown ? wxDragCopy : wxDragMove;
 467
 468     return dndresult;
 469 }
 470
 471 bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
 472 {
 473     const wxCursor& cursor = GetCursor(effect);
 474     bool result = cursor.Ok();
 475
 476     if ( result )
 477         cursor.MacInstall();
 478
 479     return result;
 480 }
 481
 482 bool gTrackingGlobalsInstalled = false;
 483
 484 // passing the globals via refcon is not needed by the CFM and later architectures anymore
 485 // but I'll leave it in there, just in case...
 486
 487 pascal OSErr wxMacWindowDragTrackingHandler(
 488     DragTrackingMessage theMessage, WindowPtr theWindow,
 489     void *handlerRefCon, DragReference theDrag );
 490 pascal OSErr wxMacWindowDragReceiveHandler(
 491     WindowPtr theWindow, void *handlerRefCon,
 492     DragReference theDrag );
 493
 494 void wxMacEnsureTrackingHandlersInstalled()
 495 {
 496     if ( !gTrackingGlobalsInstalled )
 497     {
 498         OSStatus err;
 499
 500         err = InstallTrackingHandler( NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L, &gTrackingGlobals );
 501         verify_noerr( err );
 502
 503         err = InstallReceiveHandler( NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals );
 504         verify_noerr( err );
 505
 506         gTrackingGlobalsInstalled = true;
 507     }
 508 }
 509
 510 pascal OSErr wxMacWindowDragTrackingHandler(
 511     DragTrackingMessage theMessage, WindowPtr theWindow,
 512     void *handlerRefCon, DragReference theDrag )
 513 {
 514     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
 515
 516     Point mouse, localMouse;
 517     DragAttributes attributes;
 518
 519     GetDragAttributes( theDrag, &attributes );
 520
 521     wxTopLevelWindowMac* toplevel = wxFindWinFromMacWindow( theWindow );
 522
 523     bool optionDown = GetCurrentKeyModifiers() & optionKey;
 524     wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 525
 526     switch (theMessage)
 527     {
 528         case kDragTrackingEnterHandler:
 529         case kDragTrackingLeaveHandler:
 530             break;
 531
 532         case kDragTrackingEnterWindow:
 533             if (trackingGlobals != NULL)
 534             {
 535                 trackingGlobals->m_currentTargetWindow = NULL;
 536                 trackingGlobals->m_currentTarget = NULL;
 537             }
 538             break;
 539
 540         case kDragTrackingInWindow:
 541             if (trackingGlobals == NULL)
 542                 break;
 543             if (toplevel == NULL)
 544                 break;
 545
 546             GetDragMouse( theDrag, &mouse, 0L );
 547             localMouse = mouse;
 548             GlobalToLocal( &localMouse );
 549
 550             {
 551                 wxWindow *win = NULL;
 552                 ControlPartCode controlPart;
 553                 ControlRef control = wxMacFindControlUnderMouse(
 554                     toplevel, localMouse, theWindow, &controlPart );
 555                 if ( control )
 556                     win = wxFindControlFromMacControl( control );
 557                 else
 558                     win = toplevel;
 559
 560                 int localx, localy;
 561                 localx = localMouse.h;
 562                 localy = localMouse.v;
 563
 564                 if ( win )
 565                     win->MacRootWindowToWindow( &localx, &localy );
 566                 if ( win != trackingGlobals->m_currentTargetWindow )
 567                 {
 568                     if ( trackingGlobals->m_currentTargetWindow )
 569                     {
 570                         // this window is left
 571                         if ( trackingGlobals->m_currentTarget )
 572                         {
 573                             HideDragHilite( theDrag );
 574                             trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
 575                             trackingGlobals->m_currentTarget->OnLeave();
 576                             trackingGlobals->m_currentTarget = NULL;
 577                             trackingGlobals->m_currentTargetWindow = NULL;
 578                         }
 579                     }
 580
 581                     if ( win )
 582                     {
 583                         // this window is entered
 584                         trackingGlobals->m_currentTargetWindow = win;
 585                         trackingGlobals->m_currentTarget = win->GetDropTarget();
 586                         {
 587                             if ( trackingGlobals->m_currentTarget )
 588                             {
 589                                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
 590                                 result = trackingGlobals->m_currentTarget->OnEnter( localx, localy, result );
 591                             }
 592
 593                             if ( result != wxDragNone )
 594                             {
 595                                 int x, y;
 596
 597                                 x = y = 0;
 598                                 win->MacWindowToRootWindow( &x, &y );
 599                                 RgnHandle hiliteRgn = NewRgn();
 600                                 Rect r = { y, x, y + win->GetSize().y, x + win->GetSize().x };
 601                                 RectRgn( hiliteRgn, &r );
 602                                 ShowDragHilite( theDrag, hiliteRgn, true );
 603                                 DisposeRgn( hiliteRgn );
 604                             }
 605                         }
 606                     }
 607                 }
 608                 else
 609                 {
 610                     if ( trackingGlobals->m_currentTarget )
 611                     {
 612                         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
 613                         trackingGlobals->m_currentTarget->OnDragOver( localx, localy, result );
 614                     }
 615                 }
 616
 617                 // set cursor for OnEnter and OnDragOver
 618                 if ( trackingGlobals->m_currentSource && !trackingGlobals->m_currentSource->GiveFeedback( result ) )
 619                 {
 620                   if ( !trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) )
 621                   {
 622                       int cursorID = wxCURSOR_NONE;
 623
 624                       switch (result)
 625                       {
 626                           case wxDragCopy:
 627                               cursorID = wxCURSOR_COPY_ARROW;
 628                               break;
 629
 630                           case wxDragMove:
 631                               cursorID = wxCURSOR_ARROW;
 632                               break;
 633
 634                           case wxDragNone:
 635                               cursorID = wxCURSOR_NO_ENTRY;
 636                               break;
 637
 638                           case wxDragError:
 639                           case wxDragLink:
 640                           case wxDragCancel:
 641                           default:
 642                               // put these here to make gcc happy
 643                               ;
 644                       }
 645
 646                       if (cursorID != wxCURSOR_NONE)
 647                       {
 648                           wxCursor cursor( cursorID );
 649                           cursor.MacInstall();
 650                       }
 651                    }
 652                 }
 653             }
 654             break;
 655
 656         case kDragTrackingLeaveWindow:
 657             if (trackingGlobals == NULL)
 658                 break;
 659
 660             if (trackingGlobals->m_currentTarget)
 661             {
 662                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
 663                 trackingGlobals->m_currentTarget->OnLeave();
 664                 HideDragHilite( theDrag );
 665                 trackingGlobals->m_currentTarget = NULL;
 666             }
 667             trackingGlobals->m_currentTargetWindow = NULL;
 668             break;
 669
 670         default:
 671             break;
 672     }
 673
 674     return noErr;
 675 }
 676
 677 pascal OSErr wxMacWindowDragReceiveHandler(
 678     WindowPtr theWindow,
 679     void *handlerRefCon,
 680     DragReference theDrag)
 681 {
 682     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*)handlerRefCon;
 683     if ( trackingGlobals->m_currentTarget )
 684     {
 685         Point mouse, localMouse;
 686         int localx, localy;
 687
 688         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag );
 689         GetDragMouse( theDrag, &mouse, 0L );
 690         localMouse = mouse;
 691         GlobalToLocal( &localMouse );
 692         localx = localMouse.h;
 693         localy = localMouse.v;
 694
 695         // TODO : should we use client coordinates?
 696         if ( trackingGlobals->m_currentTargetWindow )
 697             trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx, &localy );
 698         if ( trackingGlobals->m_currentTarget->OnDrop( localx, localy ) )
 699         {
 700             bool optionDown = GetCurrentKeyModifiers() & optionKey;
 701             wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 702             trackingGlobals->m_currentTarget->OnData( localx, localy, result );
 703         }
 704     }
 705
 706     return noErr;
 707 }
 708
 709 #endif