include/wx/gtk/dnd.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dnd.h
   3 // Purpose:     declaration of the wxDropTarget class
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Vadim Zeitlin, Robert Roebling
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_GTK_DND_H_
  11 #define _WX_GTK_DND_H_
  12
  13 #include "wx/icon.h"
  14
  15 // ----------------------------------------------------------------------------
  16 // macros
  17 // ----------------------------------------------------------------------------
  18
  19 // this macro may be used instead for wxDropSource ctor arguments: it will use
  20 // the icon 'name' from an XPM file under GTK, but will expand to something
  21 // else under MSW. If you don't use it, you will have to use #ifdef in the
  22 // application code.
  23 #define wxDROP_ICON(name)   wxICON(name)
  24
  25 //-------------------------------------------------------------------------
  26 // wxDropTarget
  27 //-------------------------------------------------------------------------
  28
  29 class WXDLLIMPEXP_CORE wxDropTarget: public wxDropTargetBase
  30 {
  31 public:
  32     wxDropTarget(wxDataObject *dataObject = (wxDataObject*) NULL );
  33
  34     virtual wxDragResult OnDragOver(wxCoord x, wxCoord y, wxDragResult def);
  35     virtual bool OnDrop(wxCoord x, wxCoord y);
  36     virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def);
  37     virtual bool GetData();
  38
  39   // implementation
  40
  41     GdkAtom GetMatchingPair();
  42
  43     void RegisterWidget( GtkWidget *widget );
  44     void UnregisterWidget( GtkWidget *widget );
  45
  46     GdkDragContext     *m_dragContext;
  47     GtkWidget          *m_dragWidget;
  48     GtkSelectionData   *m_dragData;
  49     guint               m_dragTime;
  50     bool                m_firstMotion;     // gdk has no "gdk_drag_enter" event
  51
  52     void SetDragContext( GdkDragContext *dc ) { m_dragContext = dc; }
  53     void SetDragWidget( GtkWidget *w ) { m_dragWidget = w; }
  54     void SetDragData( GtkSelectionData *sd ) { m_dragData = sd; }
  55     void SetDragTime( guint time ) { m_dragTime = time; }
  56 };
  57
  58 //-------------------------------------------------------------------------
  59 // wxDropSource
  60 //-------------------------------------------------------------------------
  61
  62 class WXDLLIMPEXP_CORE wxDropSource: public wxDropSourceBase
  63 {
  64 public:
  65     // constructor. set data later with SetData()
  66     wxDropSource( wxWindow *win = (wxWindow *)NULL,
  67                   const wxIcon &copy = wxNullIcon,
  68                   const wxIcon &move = wxNullIcon,
  69                   const wxIcon &none = wxNullIcon);
  70
  71     // constructor for setting one data object
  72     wxDropSource( wxDataObject& data,
  73                   wxWindow *win,
  74                   const wxIcon &copy = wxNullIcon,
  75                   const wxIcon &move = wxNullIcon,
  76                   const wxIcon &none = wxNullIcon);
  77
  78     virtual ~wxDropSource();
  79
  80     // start drag action
  81     virtual wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
  82
  83     void PrepareIcon( int action, GdkDragContext *context );
  84
  85     GtkWidget       *m_widget;
  86     GtkWidget       *m_iconWindow;
  87     GdkDragContext  *m_dragContext;
  88     wxWindow        *m_window;
  89
  90     wxDragResult     m_retValue;
  91     wxIcon           m_iconCopy,
  92                      m_iconMove,
  93                      m_iconNone;
  94
  95     bool             m_waiting;
  96
  97 private:
  98     // common part of both ctors
  99     void SetIcons(const wxIcon& copy,
 100                   const wxIcon& move,
 101                   const wxIcon& none);
 102
 103     // GTK implementation
 104     void GTKConnectDragSignals();
 105     void GTKDisconnectDragSignals();
 106
 107 };
 108
 109 #endif // _WX_GTK_DND_H_
 110