include/wx/dataobj.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dataobj.h
   3 // Purpose:     common data object classes
   4 // Author:      Robert Roebling, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     26.05.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWindows Team
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DATAOBJ_H_BASE_
  13 #define _WX_DATAOBJ_H_BASE_
  14
  15 #if defined(__WXMSW__)
  16     #include "wx/msw/ole/dataobj.h"
  17 #elif defined(__WXMOTIF__)
  18     #include "wx/motif/dataobj.h"
  19 #elif defined(__WXGTK__)
  20     #include "wx/gtk/dataobj.h"
  21 #elif defined(__WXQT__)
  22     #include "wx/qt/dnd.h"
  23 #elif defined(__WXMAC__)
  24     #include "wx/mac/dnd.h"
  25 #elif defined(__WXPM__)
  26     #include "wx/os2/dnd.h"
  27 #elif defined(__WXSTUBS__)
  28     #include "wx/stubs/dnd.h"
  29 #endif
  30
  31 // ---------------------------------------------------------------------------
  32 // wxPrivateDataObject is a specialization of wxDataObject for app specific
  33 // data (of some given kind, derive directly from wxDataObject if you wish to
  34 // efficiently support multiple formats)
  35 // ---------------------------------------------------------------------------
  36
  37 class WXDLLEXPORT wxPrivateDataObject : public wxDataObject
  38 {
  39 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  40     DECLARE_CLASS( wxPrivateDataObject )
  41 #endif
  42
  43 public:
  44     wxPrivateDataObject();
  45     virtual ~wxPrivateDataObject() { Free(); }
  46
  47     // get the format object - it is used to decide whether we support the
  48     // given output format or not
  49     wxDataFormat& GetFormat() { return m_format; }
  50
  51     // set data. will make copy of the data
  52     void SetData( const void *data, size_t size );
  53
  54     // returns pointer to data
  55     void *GetData() const { return m_data; }
  56
  57     // get the size of the data
  58     virtual size_t GetSize() const;
  59
  60     // copy data to the given buffer
  61     virtual void WriteData( void *dest ) const;
  62
  63     // these functions are provided for wxGTK compatibility, their usage is
  64     // deprecated - use GetFormat().SetId() instead
  65     void SetId( const wxString& id ) { m_format.SetId(id); }
  66     wxString GetId() const { return m_format.GetId(); }
  67
  68     // implement the base class pure virtuals
  69     virtual wxDataFormat GetPreferredFormat() const
  70         { return m_format; }
  71     virtual bool IsSupportedFormat(wxDataFormat format) const
  72         { return m_format == format; }
  73     virtual size_t GetDataSize() const
  74         { return m_size; }
  75     virtual void GetDataHere(void *dest) const
  76         { WriteData(dest); }
  77
  78     // the function which really copies the data - called by WriteData() above
  79     // and uses GetSize() to get the size of the data
  80     void WriteData( const void *data, void *dest ) const;
  81
  82 private:
  83     // free the data
  84     void Free();
  85
  86     // the data
  87     size_t     m_size;
  88     void      *m_data;
  89
  90 #if !defined(__WXMOTIF__)
  91     // the data format
  92     wxDataFormat m_format;
  93 #endif
  94 };
  95
  96
  97 #endif
  98     // _WX_DATAOBJ_H_BASE_