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