include/wx/x11/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 #ifndef _WX_DND_H_
  11 #define _WX_DND_H_
  12
  13 #include "wx/defs.h"
  14
  15 #if wxUSE_DRAG_AND_DROP
  16
  17 #include "wx/object.h"
  18 #include "wx/string.h"
  19 #include "wx/dataobj.h"
  20 #include "wx/cursor.h"
  21
  22 //-------------------------------------------------------------------------
  23 // classes
  24 //-------------------------------------------------------------------------
  25
  26 class WXDLLIMPEXP_FWD_CORE wxWindow;
  27
  28 class WXDLLIMPEXP_FWD_CORE wxDropTarget;
  29 class WXDLLIMPEXP_FWD_CORE wxTextDropTarget;
  30 class WXDLLIMPEXP_FWD_CORE wxFileDropTarget;
  31 class WXDLLIMPEXP_FWD_CORE wxPrivateDropTarget;
  32
  33 class WXDLLIMPEXP_FWD_CORE wxDropSource;
  34
  35 //-------------------------------------------------------------------------
  36 // wxDropTarget
  37 //-------------------------------------------------------------------------
  38
  39 class WXDLLIMPEXP_CORE wxDropTarget: public wxObject
  40 {
  41 public:
  42
  43     wxDropTarget();
  44     virtual ~wxDropTarget();
  45
  46     virtual void OnEnter() { }
  47     virtual void OnLeave() { }
  48     virtual bool OnDrop( long x, long y, const void *data, size_t size ) = 0;
  49
  50     // Override these to indicate what kind of data you support:
  51
  52     virtual size_t GetFormatCount() const = 0;
  53     virtual wxDataFormat GetFormat(size_t n) const = 0;
  54
  55     // implementation
  56 };
  57
  58 //-------------------------------------------------------------------------
  59 // wxTextDropTarget
  60 //-------------------------------------------------------------------------
  61
  62 class WXDLLIMPEXP_CORE wxTextDropTarget: public wxDropTarget
  63 {
  64 public:
  65
  66     wxTextDropTarget() {};
  67     virtual bool OnDrop( long x, long y, const void *data, size_t size );
  68     virtual bool OnDropText( long x, long y, const char *psz );
  69
  70 protected:
  71
  72     virtual size_t GetFormatCount() const;
  73     virtual wxDataFormat GetFormat(size_t n) const;
  74 };
  75
  76 //-------------------------------------------------------------------------
  77 // wxPrivateDropTarget
  78 //-------------------------------------------------------------------------
  79
  80 class WXDLLIMPEXP_CORE wxPrivateDropTarget: public wxDropTarget
  81 {
  82 public:
  83
  84     wxPrivateDropTarget();
  85
  86     // you have to override OnDrop to get at the data
  87
  88     // the string ID identifies the format of clipboard or DnD data. a word
  89     // processor would e.g. add a wxTextDataObject and a wxPrivateDataObject
  90     // to the clipboard - the latter with the Id "WXWORD_FORMAT".
  91
  92     void SetId( const wxString& id )
  93     { m_id = id; }
  94
  95     wxString GetId()
  96     { return m_id; }
  97
  98 private:
  99
 100     virtual size_t GetFormatCount() const;
 101     virtual wxDataFormat GetFormat(size_t n) const;
 102
 103     wxString   m_id;
 104 };
 105
 106 // ----------------------------------------------------------------------------
 107 // A drop target which accepts files (dragged from File Manager or Explorer)
 108 // ----------------------------------------------------------------------------
 109
 110 class WXDLLIMPEXP_CORE wxFileDropTarget: public wxDropTarget
 111 {
 112 public:
 113
 114     wxFileDropTarget() {};
 115
 116     virtual bool OnDrop( long x, long y, const void *data, size_t size );
 117     virtual bool OnDropFiles( long x, long y,
 118         size_t nFiles, const char * const aszFiles[] );
 119
 120 protected:
 121
 122     virtual size_t GetFormatCount() const;
 123     virtual wxDataFormat GetFormat(size_t n) const;
 124 };
 125
 126 //-------------------------------------------------------------------------
 127 // wxDropSource
 128 //-------------------------------------------------------------------------
 129
 130 enum wxDragResult
 131 {
 132     wxDragError,    // error prevented the d&d operation from completing
 133         wxDragNone,     // drag target didn't accept the data
 134         wxDragCopy,     // the data was successfully copied
 135         wxDragMove,     // the data was successfully moved
 136         wxDragCancel    // the operation was cancelled by user (not an error)
 137 };
 138
 139 class WXDLLIMPEXP_CORE wxDropSource: public wxObject
 140 {
 141 public:
 142
 143     wxDropSource( wxWindow *win );
 144     wxDropSource( wxDataObject &data, wxWindow *win );
 145
 146     virtual ~wxDropSource(void);
 147
 148     void SetData( wxDataObject &data  );
 149     wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
 150
 151     virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
 152
 153     // implementation
 154 #if 0
 155     void RegisterWindow(void);
 156     void UnregisterWindow(void);
 157
 158     wxWindow      *m_window;
 159     wxDragResult   m_retValue;
 160     wxDataObject  *m_data;
 161
 162     wxCursor      m_defaultCursor;
 163     wxCursor      m_goaheadCursor;
 164 #endif
 165 };
 166
 167 #endif
 168
 169 // wxUSE_DRAG_AND_DROP
 170
 171 #endif
 172 //_WX_DND_H_
 173