include/wx/motif/dnd.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dnd.h
   3 // Purpose:     declaration of wxDropTarget, wxDropSource classes
   4 // Author:      Julian Smart
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Vadim Zeitlin, Robert Roebling, Julian Smart
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifndef _WX_DND_H_
  12 #define _WX_DND_H_
  13
  14 #ifdef __GNUG__
  15 #pragma interface
  16 #endif
  17
  18 #include "wx/defs.h"
  19
  20 #if wxUSE_DRAG_AND_DROP
  21
  22 #include "wx/object.h"
  23 #include "wx/string.h"
  24 #include "wx/dataobj.h"
  25 #include "wx/cursor.h"
  26
  27 //-------------------------------------------------------------------------
  28 // classes
  29 //-------------------------------------------------------------------------
  30
  31 class WXDLLEXPORT wxWindow;
  32
  33 class WXDLLEXPORT wxDropTarget;
  34 class WXDLLEXPORT wxTextDropTarget;
  35 class WXDLLEXPORT wxFileDropTarget;
  36 class WXDLLEXPORT wxPrivateDropTarget;
  37
  38 class WXDLLEXPORT wxDropSource;
  39
  40 //-------------------------------------------------------------------------
  41 // wxDropTarget
  42 //-------------------------------------------------------------------------
  43
  44 class WXDLLEXPORT wxDropTarget: public wxObject
  45 {
  46   public:
  47
  48     wxDropTarget();
  49     ~wxDropTarget();
  50
  51     virtual void OnEnter() { }
  52     virtual void OnLeave() { }
  53     virtual bool OnDrop( long x, long y, const void *data, size_t size ) = 0;
  54
  55     // Override these to indicate what kind of data you support:
  56
  57     virtual size_t GetFormatCount() const = 0;
  58     virtual wxDataFormat GetFormat(size_t n) const = 0;
  59
  60   // implementation
  61 };
  62
  63 //-------------------------------------------------------------------------
  64 // wxTextDropTarget
  65 //-------------------------------------------------------------------------
  66
  67 class WXDLLEXPORT wxTextDropTarget: public wxDropTarget
  68 {
  69   public:
  70
  71     wxTextDropTarget() {};
  72     virtual bool OnDrop( long x, long y, const void *data, size_t size );
  73     virtual bool OnDropText( long x, long y, const char *psz );
  74
  75   protected:
  76
  77     virtual size_t GetFormatCount() const;
  78     virtual wxDataFormat GetFormat(size_t n) const;
  79 };
  80
  81 //-------------------------------------------------------------------------
  82 // wxPrivateDropTarget
  83 //-------------------------------------------------------------------------
  84
  85 class WXDLLEXPORT wxPrivateDropTarget: public wxDropTarget
  86 {
  87 public:
  88
  89   wxPrivateDropTarget();
  90
  91   // you have to override OnDrop to get at the data
  92
  93   // the string ID identifies the format of clipboard or DnD data. a word
  94   // processor would e.g. add a wxTextDataObject and a wxPrivateDataObject
  95   // to the clipboard - the latter with the Id "WXWORD_FORMAT".
  96
  97   void SetId( const wxString& id )
  98       { m_id = id; }
  99
 100   wxString GetId()
 101       { return m_id; }
 102
 103 private:
 104
 105   virtual size_t GetFormatCount() const;
 106   virtual wxDataFormat GetFormat(size_t n) const;
 107
 108   wxString   m_id;
 109 };
 110
 111 // ----------------------------------------------------------------------------
 112 // A drop target which accepts files (dragged from File Manager or Explorer)
 113 // ----------------------------------------------------------------------------
 114
 115 class WXDLLEXPORT wxFileDropTarget: public wxDropTarget
 116 {
 117   public:
 118
 119     wxFileDropTarget() {};
 120
 121     virtual bool OnDrop( long x, long y, const void *data, size_t size );
 122     virtual bool OnDropFiles( long x, long y,
 123                               size_t nFiles, const char * const aszFiles[] );
 124
 125   protected:
 126
 127     virtual size_t GetFormatCount() const;
 128     virtual wxDataFormat GetFormat(size_t n) const;
 129 };
 130
 131 //-------------------------------------------------------------------------
 132 // wxDropSource
 133 //-------------------------------------------------------------------------
 134
 135 enum wxDragResult
 136 {
 137   wxDragError,    // error prevented the d&d operation from completing
 138   wxDragNone,     // drag target didn't accept the data
 139   wxDragCopy,     // the data was successfully copied
 140   wxDragMove,     // the data was successfully moved
 141   wxDragCancel    // the operation was cancelled by user (not an error)
 142 };
 143
 144 class WXDLLEXPORT wxDropSource: public wxObject
 145 {
 146   public:
 147
 148     wxDropSource( wxWindow *win );
 149     wxDropSource( wxDataObject &data, wxWindow *win );
 150
 151     ~wxDropSource(void);
 152
 153     void SetData( wxDataObject &data  );
 154     wxDragResult DoDragDrop( bool bAllowMove = FALSE );
 155
 156     virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
 157
 158   // implementation
 159 #if 0
 160     void RegisterWindow(void);
 161     void UnregisterWindow(void);
 162
 163     wxWindow      *m_window;
 164     wxDragResult   m_retValue;
 165     wxDataObject  *m_data;
 166
 167     wxCursor      m_defaultCursor;
 168     wxCursor      m_goaheadCursor;
 169 #endif
 170 };
 171
 172 #endif
 173
 174    // wxUSE_DRAG_AND_DROP
 175
 176 #endif
 177        //_WX_DND_H_
 178