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 = 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
  40     // implementation
  41
  42     GdkAtom GtkGetMatchingPair();
  43
  44     void GtkRegisterWidget( GtkWidget *widget );
  45     void GtkUnregisterWidget( GtkWidget *widget );
  46
  47     GdkDragContext     *m_dragContext;
  48     GtkWidget          *m_dragWidget;
  49     GtkSelectionData   *m_dragData;
  50     guint               m_dragTime;
  51     bool                m_firstMotion;     // gdk has no "gdk_drag_enter" event
  52
  53     void GtkSetDragContext( GdkDragContext *dc ) { m_dragContext = dc; }
  54     void GtkSetDragWidget( GtkWidget *w ) { m_dragWidget = w; }
  55     void GtkSetDragData( GtkSelectionData *sd ) { m_dragData = sd; }
  56     void GtkSetDragTime( guint time ) { m_dragTime = time; }
  57 };
  58
  59 //-------------------------------------------------------------------------
  60 // wxDropSource
  61 //-------------------------------------------------------------------------
  62
  63 class WXDLLIMPEXP_CORE wxDropSource: public wxDropSourceBase
  64 {
  65 public:
  66     // constructor. set data later with SetData()
  67     wxDropSource( wxWindow *win = NULL,
  68                   const wxIcon &copy = wxNullIcon,
  69                   const wxIcon &move = wxNullIcon,
  70                   const wxIcon &none = wxNullIcon);
  71
  72     // constructor for setting one data object
  73     wxDropSource( wxDataObject& data,
  74                   wxWindow *win,
  75                   const wxIcon &copy = wxNullIcon,
  76                   const wxIcon &move = wxNullIcon,
  77                   const wxIcon &none = wxNullIcon);
  78
  79     virtual ~wxDropSource();
  80
  81     // start drag action
  82     virtual wxDragResult DoDragDrop(int flags = wxDrag_CopyOnly);
  83
  84     void PrepareIcon( int action, GdkDragContext *context );
  85
  86     GtkWidget       *m_widget;
  87     GtkWidget       *m_iconWindow;
  88     GdkDragContext  *m_dragContext;
  89     wxWindow        *m_window;
  90
  91     wxDragResult     m_retValue;
  92     wxIcon           m_iconCopy,
  93                      m_iconMove,
  94                      m_iconNone;
  95
  96     bool             m_waiting;
  97
  98 private:
  99     // common part of both ctors
 100     void SetIcons(const wxIcon& copy,
 101                   const wxIcon& move,
 102                   const wxIcon& none);
 103
 104     // GTK implementation
 105     void GTKConnectDragSignals();
 106     void GTKDisconnectDragSignals();
 107
 108 };
 109
 110 #endif // _WX_GTK_DND_H_
 111