include/wx/os2/dnd.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/os2/dnd.h
   3 // Purpose:     declaration of the wxDropTarget class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/21/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 David Webster
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12
  13 #ifndef __OS2DNDH__
  14 #define __OS2DNDH__
  15
  16 #if !wxUSE_DRAG_AND_DROP
  17     #error  "You should #define wxUSE_DRAG_AND_DROP to 1 to compile this file!"
  18 #endif  //WX_DRAG_DROP
  19
  20 #define INCL_WINSTDDRAG
  21 #include <os2.h>
  22 #ifndef __EMX__
  23 #include <pmstddlg.h>
  24 #endif
  25
  26 class CIDropTarget;
  27
  28 //-------------------------------------------------------------------------
  29 // wxDropSource
  30 //-------------------------------------------------------------------------
  31
  32 class WXDLLIMPEXP_CORE wxDropSource: public wxDropSourceBase
  33 {
  34 public:
  35     /* constructor. set data later with SetData() */
  36     wxDropSource(wxWindow* pWin);
  37
  38     /* constructor for setting one data object */
  39     wxDropSource( wxDataObject& rData,
  40                   wxWindow*     pWin
  41                 );
  42     virtual ~wxDropSource();
  43
  44     /* start drag action */
  45     virtual wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
  46     virtual bool         GiveFeedback(wxDragResult eEffect);
  47
  48 protected:
  49     void Init(void);
  50
  51     ULONG                           m_ulItems;
  52     PDRAGINFO                       m_pDragInfo;
  53     DRAGIMAGE                       m_vDragImage;
  54     PDRAGITEM                       m_pDragItem;
  55     wxWindow*                       m_pWindow;
  56 }; // end of CLASS wxDropSource
  57
  58 //-------------------------------------------------------------------------
  59 // wxDropTarget
  60 //-------------------------------------------------------------------------
  61
  62 class WXDLLIMPEXP_CORE wxDropTarget : public wxDropTargetBase
  63 {
  64 public:
  65     wxDropTarget(wxDataObject* pDataObject = NULL);
  66     virtual ~wxDropTarget();
  67
  68     //
  69     // These functions are called when data is moved over position (x, y) and
  70     // may return either wxDragCopy, wxDragMove or wxDragNone depending on
  71     // what would happen if the data were dropped here.
  72     //
  73     // The last parameter is what would happen by default and is determined by
  74     // the platform-specific logic (for example, under Windows it's wxDragCopy
  75     // if Ctrl key is pressed and wxDragMove otherwise) except that it will
  76     // always be wxDragNone if the carried data is in an unsupported format.
  77     //
  78     // OnData must be implemented and other should be overridden by derived classes
  79     //
  80     virtual wxDragResult OnData( wxCoord      vX
  81                                 ,wxCoord      vY
  82                                 ,wxDragResult eResult
  83                                );
  84     virtual bool         OnDrop( wxCoord vX
  85                                 ,wxCoord vY
  86                                );
  87             bool         IsAcceptedData(PDRAGINFO pDataSource) const;
  88
  89 protected:
  90     virtual bool         GetData(void);
  91             wxDataFormat GetSupportedFormat(PDRAGINFO pDataSource) const;
  92             void         Release(void);
  93
  94 private:
  95     CIDropTarget*                   m_pDropTarget;
  96 }; // end of CLASS wxDropTarget
  97
  98 #endif //__OS2DNDH__
  99