src/mac/classic/dnd.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/classic/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 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_DRAG_AND_DROP
  19
  20 #include "wx/dnd.h"
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/app.h"
  24     #include "wx/window.h"
  25 #endif // WX_PRECOMP
  26
  27 #include "wx/toplevel.h"
  28 #include "wx/gdicmn.h"
  29 #include "wx/mac/private.h"
  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 == 'TEXT' )
 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                         theData = new char[dataSize];
 209                         GetFlavorData((DragReference)m_currentDrag, theItem, theType, (void*) theData, &dataSize, 0L);
 210                         if( theType == 'TEXT' )
 211                         {
 212                             theData[dataSize]=0 ;
 213                             wxString convert( theData , wxConvLocal ) ;
 214                             m_dataObject->SetData( format, convert.length() * sizeof(wxChar), (const wxChar*) convert );
 215                         }
 216                         else if ( theType == kDragFlavorTypeHFS )
 217                         {
 218                             HFSFlavor* theFile = (HFSFlavor*) theData ;
 219                             wxString name = wxMacFSSpec2MacFilename( &theFile->fileSpec ) ;
 220                             if (  firstFileAdded )
 221                                 ((wxFileDataObject*)m_dataObject)->AddFile( name ) ;
 222                             else
 223                             {
 224                                 ((wxFileDataObject*)m_dataObject)->SetData( 0 , name.c_str() ) ;
 225                                 firstFileAdded = true ;
 226                             }
 227                         }
 228                         else
 229                         {
 230                             m_dataObject->SetData( format, dataSize, theData );
 231                         }
 232                         delete[] theData;
 233                     }
 234                     break ;
 235                 }
 236             }
 237         }
 238     }
 239     return true ;
 240 }
 241
 242 //-------------------------------------------------------------------------
 243 // wxDropSource
 244 //-------------------------------------------------------------------------
 245
 246 //-----------------------------------------------------------------------------
 247 // drag request
 248
 249 wxDropSource::wxDropSource(wxWindow *win,
 250                            const wxCursor &cursorCopy,
 251                            const wxCursor &cursorMove,
 252                            const wxCursor &cursorStop)
 253             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 254 {
 255     wxMacEnsureTrackingHandlersInstalled() ;
 256     m_window = win;
 257 }
 258
 259 wxDropSource::wxDropSource(wxDataObject& data,
 260                            wxWindow *win,
 261                            const wxCursor &cursorCopy,
 262                            const wxCursor &cursorMove,
 263                            const wxCursor &cursorStop)
 264             : wxDropSourceBase(cursorCopy, cursorMove, cursorStop)
 265 {
 266     wxMacEnsureTrackingHandlersInstalled() ;
 267     SetData( data );
 268     m_window = win;
 269 }
 270
 271 wxDropSource::~wxDropSource()
 272 {
 273 }
 274
 275
 276 wxDragResult wxDropSource::DoDragDrop(int WXUNUSED(flags))
 277 {
 278     wxASSERT_MSG( m_data, wxT("Drop source: no data") );
 279
 280     if (!m_data)
 281         return (wxDragResult) wxDragNone;
 282
 283     if (m_data->GetFormatCount() == 0)
 284         return (wxDragResult) wxDragNone;
 285
 286     OSErr result;
 287     DragReference theDrag;
 288     RgnHandle dragRegion;
 289     if ((result = NewDrag(&theDrag)))
 290     {
 291         return wxDragNone ;
 292     }
 293     // add data to drag
 294     size_t formatCount = m_data->GetFormatCount() ;
 295     wxDataFormat *formats = new wxDataFormat[formatCount] ;
 296     m_data->GetAllFormats( formats ) ;
 297     ItemReference theItem = 1 ;
 298     for ( size_t i = 0 ; i < formatCount ; ++i )
 299     {
 300         size_t dataSize = m_data->GetDataSize( formats[i] ) ;
 301         Ptr dataPtr = new char[dataSize] ;
 302         m_data->GetDataHere( formats[i] , dataPtr ) ;
 303         OSType type = formats[i].GetFormatId() ;
 304         if ( type == 'TEXT' )
 305         {
 306             dataSize-- ;
 307             dataPtr[ dataSize ] = 0 ;
 308             wxString st( (wxChar*) dataPtr ) ;
 309             wxCharBuffer buf = st.mb_str( wxConvLocal) ;
 310             AddDragItemFlavor(theDrag, theItem, type , buf.data(), strlen(buf), 0);
 311         }
 312         else if (type == kDragFlavorTypeHFS )
 313         {
 314             HFSFlavor  theFlavor ;
 315             OSErr err = noErr;
 316             CInfoPBRec cat;
 317
 318             wxMacFilename2FSSpec( dataPtr , &theFlavor.fileSpec ) ;
 319
 320             cat.hFileInfo.ioNamePtr = theFlavor.fileSpec.name;
 321             cat.hFileInfo.ioVRefNum = theFlavor.fileSpec.vRefNum;
 322             cat.hFileInfo.ioDirID = theFlavor.fileSpec.parID;
 323             cat.hFileInfo.ioFDirIndex = 0;
 324             err = PBGetCatInfoSync(&cat);
 325             if (err == noErr )
 326             {
 327                 theFlavor.fdFlags = cat.hFileInfo.ioFlFndrInfo.fdFlags;
 328                 if (theFlavor.fileSpec.parID == fsRtParID) {
 329                     theFlavor.fileCreator = 'MACS';
 330                     theFlavor.fileType = 'disk';
 331                 } else if ((cat.hFileInfo.ioFlAttrib & ioDirMask) != 0) {
 332                     theFlavor.fileCreator = 'MACS';
 333                     theFlavor.fileType = 'fold';
 334                 } else {
 335                     theFlavor.fileCreator = cat.hFileInfo.ioFlFndrInfo.fdCreator;
 336                     theFlavor.fileType = cat.hFileInfo.ioFlFndrInfo.fdType;
 337                 }
 338                 AddDragItemFlavor(theDrag, theItem, type , &theFlavor, sizeof(theFlavor), 0);
 339             }
 340         }
 341         else
 342         {
 343             AddDragItemFlavor(theDrag, theItem, type , dataPtr, dataSize, 0);
 344         }
 345         delete[] dataPtr ;
 346     }
 347     delete[] formats ;
 348
 349     dragRegion = NewRgn();
 350     RgnHandle tempRgn = NewRgn() ;
 351
 352     EventRecord* ev = NULL ;
 353 #if !TARGET_CARBON // TODO
 354     ev = (EventRecord*) wxTheApp->MacGetCurrentEvent() ;
 355 #else
 356     EventRecord rec ;
 357     ev = &rec ;
 358     wxMacConvertEventToRecord( (EventRef) wxTheApp->MacGetCurrentEvent() , &rec ) ;
 359 #endif
 360     const short dragRegionOuterBoundary = 10 ;
 361     const short dragRegionInnerBoundary = 9 ;
 362
 363     SetRectRgn( dragRegion , ev->where.h - dragRegionOuterBoundary ,
 364         ev->where.v  - dragRegionOuterBoundary ,
 365         ev->where.h + dragRegionOuterBoundary ,
 366         ev->where.v + dragRegionOuterBoundary ) ;
 367
 368     SetRectRgn( tempRgn , ev->where.h - dragRegionInnerBoundary ,
 369         ev->where.v  - dragRegionInnerBoundary ,
 370         ev->where.h + dragRegionInnerBoundary ,
 371         ev->where.v + dragRegionInnerBoundary ) ;
 372
 373     DiffRgn( dragRegion , tempRgn , dragRegion ) ;
 374     DisposeRgn( tempRgn ) ;
 375
 376     // TODO:work with promises in order to return data only when drag
 377     // was successfully completed
 378
 379     gTrackingGlobals.m_currentSource = this ;
 380     result = TrackDrag(theDrag, ev , dragRegion);
 381     DisposeRgn(dragRegion);
 382     DisposeDrag(theDrag);
 383     gTrackingGlobals.m_currentSource = NULL ;
 384
 385     KeyMap keymap;
 386     GetKeys(keymap);
 387     bool optionDown = keymap[1] & 4;
 388     wxDragResult dndresult = optionDown ? wxDragCopy : wxDragMove;
 389     return dndresult;
 390 }
 391
 392 bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
 393 {
 394     const wxCursor& cursor = GetCursor(effect);
 395     if ( cursor.Ok() )
 396     {
 397         cursor.MacInstall() ;
 398
 399         return true;
 400     }
 401     else
 402     {
 403         return false;
 404     }
 405 }
 406
 407 bool gTrackingGlobalsInstalled = false ;
 408
 409 // passing the globals via refcon is not needed by the CFM and later architectures anymore
 410 // but I'll leave it in there, just in case...
 411
 412 pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
 413   void *handlerRefCon, DragReference theDrag) ;
 414 pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
 415 DragReference theDrag) ;
 416
 417 void wxMacEnsureTrackingHandlersInstalled()
 418 {
 419     if( !gTrackingGlobalsInstalled )
 420     {
 421         OSErr result;
 422
 423         result = InstallTrackingHandler(NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L,&gTrackingGlobals);
 424         wxASSERT( result == noErr ) ;
 425         result = InstallReceiveHandler(NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals);
 426         wxASSERT( result == noErr ) ;
 427
 428         gTrackingGlobalsInstalled = true ;
 429     }
 430 }
 431
 432 pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
 433   void *handlerRefCon, DragReference theDrag)
 434 {
 435     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
 436     Point mouse, localMouse;
 437     DragAttributes attributes;
 438     GetDragAttributes(theDrag, &attributes);
 439     wxTopLevelWindowMac* toplevel = wxFindWinFromMacWindow( (WXWindow) theWindow ) ;
 440
 441     KeyMap keymap;
 442     GetKeys(keymap);
 443     bool optionDown = keymap[1] & 4;
 444     wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 445
 446     switch(theMessage)
 447     {
 448         case kDragTrackingEnterHandler:
 449             break;
 450         case kDragTrackingLeaveHandler:
 451             break;
 452         case kDragTrackingEnterWindow:
 453             trackingGlobals->m_currentTargetWindow = NULL ;
 454             trackingGlobals->m_currentTarget = NULL ;
 455             break;
 456         case kDragTrackingInWindow:
 457             if (toplevel == NULL)
 458                 break;
 459
 460             GetDragMouse(theDrag, &mouse, 0L);
 461             localMouse = mouse;
 462             GlobalToLocal(&localMouse);
 463
 464
 465
 466 //            if (attributes & kDragHasLeftSenderWindow)
 467             {
 468                 wxPoint point(localMouse.h , localMouse.v) ;
 469                 wxWindow *win = NULL ;
 470                 toplevel->MacGetWindowFromPointSub( point , &win ) ;
 471                 int localx , localy ;
 472                 localx = localMouse.h ;
 473                 localy = localMouse.v ;
 474                 //TODO : should we use client coordinates
 475                 if ( win )
 476                     win->MacRootWindowToWindow( &localx , &localy ) ;
 477                 if ( win != trackingGlobals->m_currentTargetWindow )
 478                 {
 479                     if ( trackingGlobals->m_currentTargetWindow )
 480                     {
 481                         // this window is left
 482                         if ( trackingGlobals->m_currentTarget )
 483                         {
 484                             HideDragHilite(theDrag);
 485                             trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 486                             trackingGlobals->m_currentTarget->OnLeave() ;
 487                             trackingGlobals->m_currentTarget = NULL;
 488                             trackingGlobals->m_currentTargetWindow = NULL ;
 489                         }
 490                     }
 491                     if ( win )
 492                     {
 493                         // this window is entered
 494                         trackingGlobals->m_currentTargetWindow = win ;
 495                         trackingGlobals->m_currentTarget = win->GetDropTarget() ;
 496                         {
 497
 498                             if ( trackingGlobals->m_currentTarget )
 499                             {
 500                                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 501                                 result = trackingGlobals->m_currentTarget->OnEnter(
 502                                     localx , localy , result ) ;
 503                             }
 504
 505
 506                             if ( result != wxDragNone )
 507                             {
 508                                 int x , y ;
 509                                 x = y = 0 ;
 510                                 win->MacWindowToRootWindow( &x , &y ) ;
 511                                 RgnHandle hiliteRgn = NewRgn() ;
 512                                 SetRectRgn( hiliteRgn , x , y , x+win->GetSize().x ,y+win->GetSize().y) ;
 513                                 ShowDragHilite(theDrag, hiliteRgn, true);
 514                                 DisposeRgn( hiliteRgn ) ;
 515                             }
 516                         }
 517                     }
 518                 }
 519                 else
 520                 {
 521                     if( trackingGlobals->m_currentTarget )
 522                     {
 523                         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 524                         trackingGlobals->m_currentTarget->OnDragOver(
 525                             localx , localy , result ) ;
 526                     }
 527                 }
 528
 529                 // set cursor for OnEnter and OnDragOver
 530                 if ( trackingGlobals->m_currentSource && trackingGlobals->m_currentSource->GiveFeedback( result ) == FALSE )
 531                 {
 532                   if ( trackingGlobals->m_currentSource->MacInstallDefaultCursor( result ) == FALSE )
 533                   {
 534                       switch( result )
 535                       {
 536                           case wxDragCopy :
 537                               {
 538                                   wxCursor cursor(wxCURSOR_COPY_ARROW) ;
 539                                   cursor.MacInstall() ;
 540                               }
 541                               break ;
 542                           case wxDragMove :
 543                               {
 544                                   wxCursor cursor(wxCURSOR_ARROW) ;
 545                                   cursor.MacInstall() ;
 546                               }
 547                               break ;
 548                           case wxDragNone :
 549                               {
 550                                   wxCursor cursor(wxCURSOR_NO_ENTRY) ;
 551                                   cursor.MacInstall() ;
 552                               }
 553                               break ;
 554
 555                           case wxDragError:
 556                           case wxDragLink:
 557                           case wxDragCancel:
 558                               // put these here to make gcc happy
 559                               ;
 560                       }
 561                   }
 562                 }
 563
 564           }
 565             // MyTrackItemUnderMouse(localMouse, theWindow);
 566             break;
 567         case kDragTrackingLeaveWindow:
 568             if (trackingGlobals->m_currentTarget)
 569             {
 570                 trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 571                 trackingGlobals->m_currentTarget->OnLeave() ;
 572                 HideDragHilite(theDrag);
 573                 trackingGlobals->m_currentTarget = NULL ;
 574             }
 575             trackingGlobals->m_currentTargetWindow = NULL ;
 576             break;
 577     }
 578     return(noErr);
 579 }
 580
 581 pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow,
 582                                            void *handlerRefCon,
 583                                            DragReference theDrag)
 584 {
 585     MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
 586     if ( trackingGlobals->m_currentTarget )
 587     {
 588         Point mouse,localMouse ;
 589         int localx,localy ;
 590
 591         trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
 592         GetDragMouse(theDrag, &mouse, 0L);
 593         localMouse = mouse;
 594         GlobalToLocal(&localMouse);
 595         localx = localMouse.h ;
 596         localy = localMouse.v ;
 597         //TODO : should we use client coordinates
 598         if ( trackingGlobals->m_currentTargetWindow )
 599             trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx , &localy ) ;
 600         if ( trackingGlobals->m_currentTarget->OnDrop( localx , localy ) )
 601         {
 602             KeyMap keymap;
 603             GetKeys(keymap);
 604             bool optionDown = keymap[1] & 4;
 605             wxDragResult result = optionDown ? wxDragCopy : wxDragMove;
 606             trackingGlobals->m_currentTarget->OnData( localx , localy , result ) ;
 607         }
 608     }
 609     return(noErr);
 610 }
 611 #endif