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 // Copyright:   (c) 1998 Stefan Csomor
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_DRAG_AND_DROP
  14
  15 #include "wx/dnd.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/app.h"
  19     #include "wx/toplevel.h"
  20     #include "wx/gdicmn.h"
  21 #endif // WX_PRECOMP
  22
  23 #include "wx/osx/private.h"
  24
  25 //----------------------------------------------------------------------------
  26 // wxDropTarget
  27 //----------------------------------------------------------------------------
  28
  29 wxDragResult wxDropTarget::OnDragOver(
  30     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  31     wxDragResult def )
  32 {
  33     return CurrentDragHasSupportedFormat() ? def : wxDragNone;
  34 }
  35
  36 wxDataFormat wxDropTarget::GetMatchingPair()
  37 {
  38     wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/osx/dnd_osx.cpp");
  39     return wxDF_INVALID;
  40 }
  41
  42 bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
  43 {
  44     if (m_dataObject == NULL)
  45         return false;
  46
  47     return CurrentDragHasSupportedFormat();
  48 }
  49
  50 wxDragResult wxDropTarget::OnData(
  51     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
  52     wxDragResult def )
  53 {
  54     if (m_dataObject == NULL)
  55         return wxDragNone;
  56
  57     if (!CurrentDragHasSupportedFormat())
  58         return wxDragNone;
  59
  60     return GetData() ? def : wxDragNone;
  61 }
  62
  63 bool wxDropTarget::CurrentDragHasSupportedFormat()
  64 {
  65     bool supported = false;
  66     if (m_dataObject == NULL)
  67         return false;
  68
  69     if ( wxDropSource* currentSource = wxDropSource::GetCurrentDropSource() )
  70     {
  71         wxDataObject* data = currentSource->GetDataObject();
  72
  73         if ( data )
  74         {
  75             size_t formatcount = data->GetFormatCount();
  76             wxDataFormat *array = new wxDataFormat[formatcount];
  77             data->GetAllFormats( array );
  78             for (size_t i = 0; !supported && i < formatcount; i++)
  79             {
  80                 wxDataFormat format = array[i];
  81                 if ( m_dataObject->IsSupported( format, wxDataObject::Set ) )
  82                 {
  83                     supported = true;
  84                     break;
  85                 }
  86             }
  87
  88             delete [] array;
  89         }
  90     }
  91
  92     if ( !supported )
  93     {
  94         supported = m_dataObject->HasDataInPasteboard( m_currentDragPasteboard );
  95     }
  96
  97     return supported;
  98 }
  99
 100 bool wxDropTarget::GetData()
 101 {
 102     if (m_dataObject == NULL)
 103         return false;
 104
 105     if ( !CurrentDragHasSupportedFormat() )
 106         return false;
 107
 108     bool transferred = false;
 109     if ( wxDropSource* currentSource = wxDropSource::GetCurrentDropSource() )
 110     {
 111         wxDataObject* data = currentSource->GetDataObject();
 112
 113         if (data != NULL)
 114         {
 115             size_t formatcount = data->GetFormatCount();
 116             wxDataFormat *array = new wxDataFormat[formatcount];
 117             data->GetAllFormats( array );
 118             for (size_t i = 0; !transferred && i < formatcount; i++)
 119             {
 120                 wxDataFormat format = array[i];
 121                 if ( m_dataObject->IsSupported( format, wxDataObject::Set ) )
 122                 {
 123                     int size = data->GetDataSize( format );
 124                     transferred = true;
 125
 126                     if (size == 0)
 127                     {
 128                         m_dataObject->SetData( format, 0, 0 );
 129                     }
 130                     else
 131                     {
 132                         char *d = new char[size];
 133                         data->GetDataHere( format, (void*)d );
 134                         m_dataObject->SetData( format, size, d );
 135                         delete [] d;
 136                     }
 137                 }
 138             }
 139
 140             delete [] array;
 141         }
 142     }
 143
 144     if ( !transferred )
 145     {
 146         transferred = m_dataObject->GetFromPasteboard( m_currentDragPasteboard );
 147     }
 148
 149     return transferred;
 150 }
 151
 152 //-------------------------------------------------------------------------
 153 // wxDropSource
 154 //-------------------------------------------------------------------------
 155
 156 //-----------------------------------------------------------------------------
 157 // drag request
 158
 159 wxDropSource::~wxDropSource()
 160 {
 161 }
 162
 163 bool wxDropSource::MacInstallDefaultCursor(wxDragResult effect)
 164 {
 165     const wxCursor& cursor = GetCursor(effect);
 166     bool result = cursor.IsOk();
 167
 168     if ( result )
 169         cursor.MacInstall();
 170
 171     return result;
 172 }
 173
 174 #endif // wxUSE_DRAG_AND_DROP
 175