src/osx/dnd_osx.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/dnd_osx.cpp
   3 // Purpose:     Mac common 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/toplevel.h"
  21     #include "wx/gdicmn.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/osx/private.h"
  25
  26 //----------------------------------------------------------------------------
  27 // wxDropTarget
  28 //----------------------------------------------------------------------------
  29
  30 wxDragResult wxDropTarget::OnDragOver(
  31     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  32     wxDragResult def )
  33 {
  34     return CurrentDragHasSupportedFormat() ? def : wxDragNone;
  35 }
  36
  37 wxDataFormat wxDropTarget::GetMatchingPair()
  38 {
  39     wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/osx/dnd_osx.cpp");
  40     return wxDF_INVALID;
  41 }
  42
  43 bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
  44 {
  45     if (m_dataObject == NULL)
  46         return false;
  47
  48     return CurrentDragHasSupportedFormat();
  49 }
  50
  51 wxDragResult wxDropTarget::OnData(
  52     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  53     wxDragResult def )
  54 {
  55     if (m_dataObject == NULL)
  56         return wxDragNone;
  57
  58     if (!CurrentDragHasSupportedFormat())
  59         return wxDragNone;
  60
  61     return GetData() ? def : wxDragNone;
  62 }
  63
  64 bool wxDropTarget::CurrentDragHasSupportedFormat()
  65 {
  66     bool supported = false;
  67     if (m_dataObject == NULL)
  68         return false;
  69
  70     if ( wxDropSource* currentSource = wxDropSource::GetCurrentDropSource() )
  71     {
  72         wxDataObject* data = currentSource->GetDataObject();
  73
  74         if ( data )
  75         {
  76             size_t formatcount = data->GetFormatCount();
  77             wxDataFormat *array = new wxDataFormat[formatcount];
  78             data->GetAllFormats( array );
  79             for (size_t i = 0; !supported && i < formatcount; i++)
  80             {
  81                 wxDataFormat format = array[i];
  82                 if ( m_dataObject->IsSupported( format ) )
  83                 {
  84                     supported = true;
  85                     break;
  86                 }
  87             }
  88
  89             delete [] array;
  90         }
  91     }
  92
  93     if ( !supported )
  94     {
  95         supported = m_dataObject->HasDataInPasteboard( m_currentDragPasteboard );
  96     }
  97
  98     return supported;
  99 }
 100
 101 bool wxDropTarget::GetData()
 102 {
 103     if (m_dataObject == NULL)
 104         return false;
 105
 106     if ( !CurrentDragHasSupportedFormat() )
 107         return false;
 108
 109     bool transferred = false;
 110     if ( wxDropSource* currentSource = wxDropSource::GetCurrentDropSource() )
 111     {
 112         wxDataObject* data = currentSource->GetDataObject();
 113
 114         if (data != NULL)
 115         {
 116             size_t formatcount = data->GetFormatCount();
 117             wxDataFormat *array = new wxDataFormat[formatcount];
 118             data->GetAllFormats( array );
 119             for (size_t i = 0; !transferred && i < formatcount; i++)
 120             {
 121                 wxDataFormat format = array[i];
 122                 if ( m_dataObject->IsSupported( format ) )
 123                 {
 124                     int size = data->GetDataSize( format );
 125                     transferred = true;
 126
 127                     if (size == 0)
 128                     {
 129                         m_dataObject->SetData( format, 0, 0 );
 130                     }
 131                     else
 132                     {
 133                         char *d = new char[size];
 134                         data->GetDataHere( format, (void*)d );
 135                         m_dataObject->SetData( format, size, d );
 136                         delete [] d;
 137                     }
 138                 }
 139             }
 140
 141             delete [] array;
 142         }
 143     }
 144
 145     if ( !transferred )
 146     {
 147         transferred = m_dataObject->GetFromPasteboard( m_currentDragPasteboard );
 148     }
 149
 150     return transferred;
 151 }
 152
 153 //-------------------------------------------------------------------------
 154 // wxDropSource
 155 //-------------------------------------------------------------------------
 156
 157 //-----------------------------------------------------------------------------
 158 // drag request
 159
 160 wxDropSource::~wxDropSource()
 161 {
 162 }
 163
 164 bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
 165 {
 166     const wxCursor& cursor = GetCursor(effect);
 167     bool result = cursor.IsOk();
 168
 169     if ( result )
 170         cursor.MacInstall();
 171
 172     return result;
 173 }
 174
 175 #endif // wxUSE_DRAG_AND_DROP
 176