drag and drop implementation

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13280 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2001-12-31 16:37:42 +00:00
parent dbfc5b9763
commit a07c12126f
13 changed files with 1070 additions and 246 deletions
--- a/src/mac/dnd.cpp
+++ b/src/mac/dnd.cpp
@@ -24,77 +24,204 @@
 // global
 // ----------------------------------------------------------------------------

-// ----------------------------------------------------------------------------
+void wxMacEnsureTrackingHandlersInstalled() ;
+
+typedef struct 
+{
+    wxWindow* m_currentTargetWindow ;
+    wxDropTarget* m_currentTarget ;
+    wxDropSource* m_currentSource ;
+} MacTrackingGlobals ;
+
+MacTrackingGlobals gTrackingGlobals ; 
+
+//----------------------------------------------------------------------------
 // wxDropTarget
-// ----------------------------------------------------------------------------
+//----------------------------------------------------------------------------

-wxDropTarget::wxDropTarget()
+wxDropTarget::wxDropTarget( wxDataObject *data )
+            : wxDropTargetBase( data )
 {
-};
-
-wxDropTarget::~wxDropTarget()
-{
-};
-
-// ----------------------------------------------------------------------------
-// wxTextDropTarget
-// ----------------------------------------------------------------------------
-#ifndef __DARWIN__
-bool wxTextDropTarget::OnDrop( wxCoord x, wxCoord y, const void *pData )
-{
-  OnDropText( x, y, (const char*)pData );
-  return TRUE;
-};
-#endif
-
-bool wxTextDropTarget::OnDropText( wxCoord x, wxCoord y, const wxString &psz )
-{
-  printf( "Got dropped text: %s.\n", (char *)psz );
-  printf( "At x: %d, y: %d.\n", (int)x, (int)y );
-  return TRUE;
-};
-
-#ifndef __DARWIN__
-size_t wxTextDropTarget::GetFormatCount() const
-{
-  return 1;
+    wxMacEnsureTrackingHandlersInstalled() ;
 }

-wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
+wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
+                                       wxCoord WXUNUSED(y),
+                                       wxDragResult def )
 {
-  return wxDF_TEXT;
-}
-#endif

-// ----------------------------------------------------------------------------
-// wxFileDropTarget
-// ----------------------------------------------------------------------------
-
-#ifndef __DARWIN__
-bool wxFileDropTarget::OnDropFiles( wxCoord x, wxCoord y, size_t nFiles, const char * const WXUNUSED(aszFiles)[] )
-{
-  printf( "Got %d dropped files.\n", (int)nFiles );
-  printf( "At x: %d, y: %d.\n", (int)x, (int)y );
-  return TRUE;
-}
-#endif
-
-bool wxFileDropTarget::OnDrop(wxCoord x, wxCoord y, const wxArrayString& filenames)
-{
-  return OnDropFiles(x, y, 1, &filenames); 
+    return CurrentDragHasSupportedFormat() ? def : wxDragNone;
 }

-#ifndef __DARWIN__
-size_t wxFileDropTarget::GetFormatCount() const
+bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
 {
-  return 1;
+    if (!m_dataObject)
+        return FALSE;
+
+    return CurrentDragHasSupportedFormat() ;
 }

-wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
+wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
+                                   wxDragResult def )
 {
-  return wxDF_FILENAME;
+    if (!m_dataObject)
+        return wxDragNone;
+
+    if (!CurrentDragHasSupportedFormat())
+        return wxDragNone;
+
+    return GetData() ? def : wxDragNone;
+}
+
+bool wxDropTarget::CurrentDragHasSupportedFormat() 
+{
+    bool supported = false ;
+    if ( gTrackingGlobals.m_currentSource != NULL )
+    {
+      wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject() ;
+      
+      if ( data )
+      {
+        int formatcount = data->GetFormatCount() ;
+        wxDataFormat *array = new wxDataFormat[ formatcount  ];
+        data->GetAllFormats( array );
+        for (size_t i = 0; !supported && i < formatcount ; i++)
+        {
+            wxDataFormat format = array[i] ;
+            if ( m_dataObject->IsSupported( format ) ) 
+            {
+              supported = true ;
+              break ;
+            }
+        }
+        delete[] array ;
+      }
+    }
+    if ( !supported )
+    {
+      UInt16 items ;
+      OSErr result;
+      CountDragItems(m_currentDrag, &items);
+      for (UInt16 index = 1; index <= items && supported == false ; ++index) 
+      {
+          ItemReference theItem;
+          FlavorType theType ;
+          UInt16 flavors = 0 ;
+          GetDragItemReferenceNumber(m_currentDrag, index, &theItem);
+          CountDragItemFlavors( m_currentDrag, theItem , &flavors ) ;
+          for ( UInt16 flavor = 1 ; flavor <= flavors ; ++flavor )
+          {
+            result = GetFlavorType(m_currentDrag, theItem, flavor , &theType);
+            if ( m_dataObject->IsSupportedFormat( wxDataFormat( theType ) ) )
+            {
+              supported = true ;
+              break ;
+            }
+          }
+      }
+    }
+    return supported ;   
+}
+
+bool wxDropTarget::GetData()
+{
+    if (!m_dataObject)
+        return FALSE;
+        
+    if ( !CurrentDragHasSupportedFormat() )
+        return FALSE ;
+     
+    bool transferred = false ;   
+    if ( gTrackingGlobals.m_currentSource != NULL )
+    {
+      wxDataObject* data = gTrackingGlobals.m_currentSource->GetDataObject() ;
+      
+      if ( data )
+      {
+        int formatcount = data->GetFormatCount() ;
+        wxDataFormat *array = new wxDataFormat[ formatcount  ];
+        data->GetAllFormats( array );
+        for (size_t i = 0; !transferred && i < formatcount ; i++)
+        {
+            wxDataFormat format = array[i] ;
+            if ( m_dataObject->IsSupported( format ) ) 
+            {
+              int size = data->GetDataSize( format );
+              transferred = true ;
+
+              if (size == 0) 
+              {
+                m_dataObject->SetData(format , 0 , 0 ) ;
+              }
+              else
+              {
+                char *d = new char[size];
+                data->GetDataHere( format , (void*) d );
+                m_dataObject->SetData( format , size , d ) ;
+                delete[] d ;
+              }
+            }
+         }
+        delete[] array ;
+      }
+    }
+    if ( !transferred )
+    {
+      UInt16 items ;
+      OSErr result;
+      CountDragItems(m_currentDrag, &items);
+      for (UInt16 index = 1; index <= items; ++index) 
+      {
+          ItemReference theItem;
+          FlavorType theType ;
+          UInt16 flavors = 0 ;
+          GetDragItemReferenceNumber(m_currentDrag, index, &theItem);
+          CountDragItemFlavors( m_currentDrag, theItem , &flavors ) ;
+          for ( UInt16 flavor = 1 ; flavor <= flavors ; ++flavor )
+          {
+            result = GetFlavorType(m_currentDrag, theItem, flavor , &theType);
+            wxDataFormat format(theType) ;
+            if ( m_dataObject->IsSupportedFormat( format ) )
+            {
+              FlavorFlags theFlags;
+              result = GetFlavorFlags(m_currentDrag, theItem, theType, &theFlags);
+              if (result == noErr) 
+              {
+                  Size dataSize ;
+                  Ptr theData ;
+                  GetFlavorDataSize(m_currentDrag, theItem, theType, &dataSize);
+          			  if ( theType == 'TEXT' )
+          			    dataSize++ ;
+                  theData = new char[dataSize];
+                  GetFlavorData(m_currentDrag, theItem, theType, (void*) theData, &dataSize, 0L); 
+                  if( theType == 'TEXT' )
+                  {
+                    theData[dataSize]=0 ;       
+                    if ( wxApp::s_macDefaultEncodingIsPC )
+                    {
+                      wxMacConvertToPC((char*)theData) ;
+                    }
+                    m_dataObject->SetData( format, dataSize, theData );
+                  }
+                  else if ( theType == kDragFlavorTypeHFS )
+                  {
+                    HFSFlavor* theFile = (HFSFlavor*) theData ;
+                    wxString name = wxMacFSSpec2MacFilename( &theFile->fileSpec ) ;
+                    m_dataObject->SetData( format , name.Length() + 1, name ) ;
+                  }
+                  else
+                  {
+                    m_dataObject->SetData( format, dataSize, theData );
+                  }
+                  delete[] theData;
+              }
+              break ;
+            }
+          }
+      }
+    }
+    return TRUE ;   
 }
-#endif

 //-------------------------------------------------------------------------
 // wxDropSource
@@ -103,39 +230,286 @@ wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
 //-----------------------------------------------------------------------------
 // drag request

-wxDropSource::wxDropSource( wxWindow *win )
+wxDropSource::wxDropSource(wxWindow *win,
+                           const wxIcon &iconCopy,
+                           const wxIcon &iconMove,
+                           const wxIcon &iconNone)
 {
-    // TODO
-  //    m_window = win;
-    m_data = NULL;
+    wxMacEnsureTrackingHandlersInstalled() ;
+    m_window = win;
+}

-    //    m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
-    //    m_goaheadCursor = wxCursor( wxCURSOR_HAND );
-};
-
-wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
+wxDropSource::wxDropSource(wxDataObject& data,
+                           wxWindow *win,
+                           const wxIcon &iconCopy,
+                           const wxIcon &iconMove,
+                           const wxIcon &iconNone)
 {
-    // TODO
-  //    m_window = win;
-    m_data = &data;
+    wxMacEnsureTrackingHandlersInstalled() ;
+    SetData( data );
+    m_window = win;
+}

-    //    m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
-    //    m_goaheadCursor = wxCursor( wxCURSOR_HAND );
-};
-
-void wxDropSource::SetData( wxDataObject &data )
+wxDropSource::~wxDropSource()
 {
-    m_data = &data;
-};
+}

-wxDropSource::~wxDropSource(void)
-{
-};
-   
-wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
-{
-    // TODO
-    return wxDragError;
-};

+wxDragResult wxDropSource::DoDragDrop( bool allowMove )
+{
+    wxASSERT_MSG( m_data, wxT("Drop source: no data") );
+
+    if (!m_data)
+        return (wxDragResult) wxDragNone;
+
+    if (m_data->GetFormatCount() == 0)
+        return (wxDragResult) wxDragNone;
+
+    OSErr result;
+    DragReference theDrag;
+    RgnHandle dragRegion;
+    if (result = NewDrag(&theDrag)) 
+    {
+        return wxDragNone ;
+    }
+    // add data to drag
+    size_t formatCount = m_data->GetFormatCount() ;
+    wxDataFormat *formats = new wxDataFormat[formatCount] ;
+    m_data->GetAllFormats( formats ) ;
+    ItemReference theItem = 1 ;
+    for ( int i = 0 ; i < formatCount ; ++i )
+    {
+        size_t dataSize = m_data->GetDataSize( formats[i] ) ;
+        Ptr dataPtr = new char[dataSize] ;
+        m_data->GetDataHere( formats[i] , dataPtr ) ;
+        OSType type = formats[i].GetFormatId() ;
+        if ( type == 'TEXT' )
+        {
+          dataSize-- ;
+          if ( wxApp::s_macDefaultEncodingIsPC )
+          {
+            wxMacConvertFromPC((char*)dataPtr) ;
+          }
+          AddDragItemFlavor(theDrag, theItem, type , dataPtr, dataSize, 0);
+        }
+        else if (type == kDragFlavorTypeHFS )
+        {
+          HFSFlavor  theFlavor ;
+        	OSErr err = noErr;
+         	CInfoPBRec cat;
+ 
+          wxMacFilename2FSSpec( dataPtr , &theFlavor.fileSpec ) ;
+
+        	cat.hFileInfo.ioNamePtr = theFlavor.fileSpec.name;
+        	cat.hFileInfo.ioVRefNum = theFlavor.fileSpec.vRefNum;
+        	cat.hFileInfo.ioDirID = theFlavor.fileSpec.parID;
+        	cat.hFileInfo.ioFDirIndex = 0;
+        	err = PBGetCatInfoSync(&cat);
+        	if (err == noErr )
+        	{
+          	theFlavor.fdFlags = cat.hFileInfo.ioFlFndrInfo.fdFlags;
+          	if (theFlavor.fileSpec.parID == fsRtParID) {
+          		theFlavor.fileCreator = 'MACS';
+          		theFlavor.fileType = 'disk';
+          	} else if ((cat.hFileInfo.ioFlAttrib & ioDirMask) != 0) {
+          		theFlavor.fileCreator = 'MACS';
+          		theFlavor.fileType = 'fold';
+          	} else {
+          		theFlavor.fileCreator = cat.hFileInfo.ioFlFndrInfo.fdCreator;
+          		theFlavor.fileType = cat.hFileInfo.ioFlFndrInfo.fdType;
+          	}
+            AddDragItemFlavor(theDrag, theItem, type , &theFlavor, sizeof(theFlavor), 0);  
+          }    
+        }
+        else
+        {
+          AddDragItemFlavor(theDrag, theItem, type , dataPtr, dataSize, 0);      
+        }
+        delete[] dataPtr ;
+    }
+    delete[] formats ;
+    
+    dragRegion = NewRgn();
+    RgnHandle tempRgn = NewRgn() ;
+    
+    EventRecord* ev = wxTheApp->MacGetCurrentEvent() ;
+    const short dragRegionOuterBoundary = 10 ;
+    const short dragRegionInnerBoundary = 9 ;
+    
+    SetRectRgn( dragRegion , ev->where.h - dragRegionOuterBoundary , 
+      ev->where.v  - dragRegionOuterBoundary ,
+      ev->where.h + dragRegionOuterBoundary , 
+      ev->where.v + dragRegionOuterBoundary ) ;
+
+    SetRectRgn( tempRgn , ev->where.h - dragRegionInnerBoundary , 
+      ev->where.v  - dragRegionInnerBoundary ,
+      ev->where.h + dragRegionInnerBoundary , 
+      ev->where.v + dragRegionInnerBoundary ) ;
+
+    DiffRgn( dragRegion , tempRgn , dragRegion ) ;
+    DisposeRgn( tempRgn ) ;    
+      
+    // TODO:work with promises in order to return data only when drag
+    // was successfully completed
+
+    gTrackingGlobals.m_currentSource = this ;
+    result = TrackDrag(theDrag, ev , dragRegion);
+    DisposeRgn(dragRegion);
+    DisposeDrag(theDrag);
+    gTrackingGlobals.m_currentSource = NULL ;
+
+    return wxDragCopy ;
+}
+
+bool gTrackingGlobalsInstalled = false ;
+
+// passing the globals via refcon is not needed by the CFM and later architectures anymore
+// but I'll leave it in there, just in case...
+
+pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
+  void *handlerRefCon, DragReference theDrag) ;
+pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
+DragReference theDrag) ;
+
+void wxMacEnsureTrackingHandlersInstalled()
+{
+    if( !gTrackingGlobalsInstalled )
+    {
+        OSErr result;
+
+        result = InstallTrackingHandler(NewDragTrackingHandlerUPP(wxMacWindowDragTrackingHandler), 0L,&gTrackingGlobals);
+        wxASSERT( result == noErr ) ;
+        result = InstallReceiveHandler(NewDragReceiveHandlerUPP(wxMacWindowDragReceiveHandler), 0L, &gTrackingGlobals);
+        wxASSERT( result == noErr ) ;
+
+        gTrackingGlobalsInstalled = true ;
+    }
+}
+
+pascal OSErr wxMacWindowDragTrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
+  void *handlerRefCon, DragReference theDrag)
+{ 
+    MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
+    Point mouse, localMouse;
+    DragAttributes attributes;
+    RgnHandle hiliteRgn;
+    GetDragAttributes(theDrag, &attributes);
+    wxTopLevelWindowMac* toplevel = wxFindWinFromMacWindow( theWindow ) ; 
+    switch(theMessage) 
+    {
+        case kDragTrackingEnterHandler:
+            break;
+        case kDragTrackingLeaveHandler:
+            break;
+        case kDragTrackingEnterWindow:
+           trackingGlobals->m_currentTargetWindow = NULL ;
+            trackingGlobals->m_currentTarget = NULL ;
+            break;
+        case kDragTrackingInWindow:
+            if (toplevel == NULL)
+                break;
+
+            GetDragMouse(theDrag, &mouse, 0L);
+            localMouse = mouse;
+            GlobalToLocal(&localMouse);
+            
+//            if (attributes & kDragHasLeftSenderWindow) 
+            {
+                wxPoint point(localMouse.h , localMouse.v) ;
+                wxWindow *win = NULL ;
+                toplevel->MacGetWindowFromPointSub( point , &win ) ;
+                int localx , localy ;
+                localx = localMouse.h ;
+                localy = localMouse.v ;
+                //TODO : should we use client coordinates
+                if ( win )
+                    win->MacRootWindowToWindow( &localx , &localy ) ;
+                if ( win != trackingGlobals->m_currentTargetWindow )
+                {
+                    if ( trackingGlobals->m_currentTargetWindow )
+                    {
+                        // this window is left
+                        if ( trackingGlobals->m_currentTarget )
+                        {
+                            HideDragHilite(theDrag);
+                            trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
+                            trackingGlobals->m_currentTarget->OnLeave() ;
+                            trackingGlobals->m_currentTarget = NULL;
+                            trackingGlobals->m_currentTargetWindow = NULL ;
+                        }
+                    }
+                    if ( win )
+                    {
+                        // this window is entered
+                        trackingGlobals->m_currentTargetWindow = win ;
+                        trackingGlobals->m_currentTarget = win->GetDropTarget() ;
+                        if ( trackingGlobals->m_currentTarget )
+                        {
+                          trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
+                           if ( trackingGlobals->m_currentTarget->OnEnter(
+                                localx , localy , wxDragCopy ) != wxDragNone )
+                            {
+                              int x , y ;
+                              x = y = 0 ;
+                              win->MacWindowToRootWindow( &x , &y ) ;
+                              RgnHandle hiliteRgn = NewRgn() ;
+                              SetRectRgn( hiliteRgn , x , y , x+win->GetSize().x ,y+win->GetSize().y) ;
+                              ShowDragHilite(theDrag, hiliteRgn, true);
+                              DisposeRgn( hiliteRgn ) ;
+                            }
+                        }
+                    }
+                }
+                else
+                {
+                    if( trackingGlobals->m_currentTarget )
+                    {
+                        trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
+                        trackingGlobals->m_currentTarget->OnDragOver(
+                            localx , localy , wxDragCopy ) ;
+                    }
+                }
+                
+          }
+            // MyTrackItemUnderMouse(localMouse, theWindow);
+            break;
+        case kDragTrackingLeaveWindow:
+            if (trackingGlobals->m_currentTarget) 
+            {
+                trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
+                trackingGlobals->m_currentTarget->OnLeave() ;
+                HideDragHilite(theDrag);
+                trackingGlobals->m_currentTarget = NULL ;
+            }
+            trackingGlobals->m_currentTargetWindow = NULL ;
+            break;
+    }
+    return(noErr);
+}
+
+pascal OSErr wxMacWindowDragReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
+DragReference theDrag)
+{ 
+    MacTrackingGlobals* trackingGlobals = (MacTrackingGlobals*) handlerRefCon;
+    if ( trackingGlobals->m_currentTarget )
+    {
+        Point mouse,localMouse ;
+        int localx,localy ;
+        
+        trackingGlobals->m_currentTarget->SetCurrentDrag( theDrag ) ;
+        GetDragMouse(theDrag, &mouse, 0L);
+        localMouse = mouse;
+        GlobalToLocal(&localMouse);
+        localx = localMouse.h ;
+        localy = localMouse.v ;
+        //TODO : should we use client coordinates
+        if ( trackingGlobals->m_currentTargetWindow )
+            trackingGlobals->m_currentTargetWindow->MacRootWindowToWindow( &localx , &localy ) ;
+        if ( trackingGlobals->m_currentTarget->OnDrop( localx , localy ) )
+        {
+            trackingGlobals->m_currentTarget->OnData( localx , localy , wxDragCopy ) ;
+        }
+    }
+    return(noErr);
+}
 #endif