1 ///////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxDropTarget class
4 // Author: Robert Roebling
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 ///////////////////////////////////////////////////////////////////////////////
11 #pragma implementation "dnd.h"
15 #include "wx/window.h"
17 #include "wx/gdicmn.h"
20 #include "gdk/gdkprivate.h"
24 // ----------------------------------------------------------------------------
26 // ----------------------------------------------------------------------------
28 extern bool g_blockEventsOnDrag
;
30 // ----------------------------------------------------------------------------
32 // ----------------------------------------------------------------------------
34 wxDropTarget::wxDropTarget()
38 wxDropTarget::~wxDropTarget()
42 void wxDropTarget::Drop( GdkEvent
*event
, int x
, int y
)
44 printf( "Drop data is of type %s.\n", event
->dropdataavailable
.data_type
);
46 OnDrop( x
, y
, (char *)event
->dropdataavailable
.data
);
49 void wxDropTarget::UnregisterWidget( GtkWidget
*widget
)
53 gtk_widget_dnd_drop_set( widget
, FALSE
, (gchar
**) NULL
, 0, FALSE
);
56 void wxDropTarget::RegisterWidget( GtkWidget
*widget
)
61 for ( size_t i
= 0; i
< GetFormatCount(); i
++ )
63 wxDataFormat df
= GetFormat( i
);
67 if (i
> 0) formats
+= ";";
68 formats
+= "text/plain";
72 if (i
> 0) formats
+= ";";
73 formats
+= "file:ALL";
81 char *str
= WXSTRINGCAST formats
;
83 gtk_widget_dnd_drop_set( widget
, TRUE
, &str
, valid
, FALSE
);
86 // ----------------------------------------------------------------------------
88 // ----------------------------------------------------------------------------
90 bool wxTextDropTarget::OnDrop( long x
, long y
, const void *pData
)
92 OnDropText( x
, y
, (const char*)pData
);
96 bool wxTextDropTarget::OnDropText( long x
, long y
, const char *psz
)
98 printf( "Got dropped text: %s.\n", psz
);
99 printf( "At x: %d, y: %d.\n", (int)x
, (int)y
);
103 size_t wxTextDropTarget::GetFormatCount() const
108 wxDataFormat
wxTextDropTarget::GetFormat(size_t WXUNUSED(n
)) const
113 // ----------------------------------------------------------------------------
115 // ----------------------------------------------------------------------------
117 bool wxFileDropTarget::OnDropFiles( long x
, long y
, size_t nFiles
, const char * const WXUNUSED(aszFiles
)[] )
119 printf( "Got %d dropped files.\n", (int)nFiles
);
120 printf( "At x: %d, y: %d.\n", (int)x
, (int)y
);
124 bool wxFileDropTarget::OnDrop(long x
, long y
, const void *WXUNUSED(pData
) )
126 char *str
= "/this/is/a/path.txt";
128 return OnDropFiles(x
, y
, 1, &str
);
131 size_t wxFileDropTarget::GetFormatCount() const
136 wxDataFormat
wxFileDropTarget::GetFormat(size_t WXUNUSED(n
)) const
138 return wxDF_FILENAME
;
141 //-------------------------------------------------------------------------
143 //-------------------------------------------------------------------------
145 //-----------------------------------------------------------------------------
148 void gtk_drag_callback( GtkWidget
*widget
, GdkEvent
*event
, wxDropSource
*source
)
150 printf( "Data requested for dropping.\n" );
152 wxDataObject
*data
= source
->m_data
;
154 size_t size
= data
->GetDataSize();
155 char *ptr
= new char[size
];
156 data
->GetDataHere( ptr
);
158 gtk_widget_dnd_data_set( widget
, event
, ptr
, size
);
162 source
->m_retValue
= wxDragCopy
;
165 wxDropSource::wxDropSource( wxWindow
*win
)
167 g_blockEventsOnDrag
= TRUE
;
170 m_widget
= win
->m_widget
;
171 if (win
->m_wxwindow
) m_widget
= win
->m_wxwindow
;
173 m_data
= (wxDataObject
*) NULL
;
174 m_retValue
= wxDragCancel
;
176 m_defaultCursor
= wxCursor( wxCURSOR_NO_ENTRY
);
177 m_goaheadCursor
= wxCursor( wxCURSOR_HAND
);
180 wxDropSource::wxDropSource( wxDataObject
&data
, wxWindow
*win
)
182 g_blockEventsOnDrag
= TRUE
;
185 m_widget
= win
->m_widget
;
186 if (win
->m_wxwindow
) m_widget
= win
->m_wxwindow
;
187 m_retValue
= wxDragCancel
;
191 m_defaultCursor
= wxCursor( wxCURSOR_NO_ENTRY
);
192 m_goaheadCursor
= wxCursor( wxCURSOR_HAND
);
195 void wxDropSource::SetData( wxDataObject
&data
)
200 wxDropSource::~wxDropSource(void)
202 // if (m_data) delete m_data;
204 g_blockEventsOnDrag
= FALSE
;
207 wxDragResult
wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove
) )
209 if (gdk_dnd
.dnd_grabbed
) return (wxDragResult
) wxDragNone
;
210 if (gdk_dnd
.drag_really
) return (wxDragResult
) wxDragNone
;
212 wxASSERT_MSG( m_data
, "wxDragSource: no data" );
214 if (!m_data
) return (wxDragResult
) wxDragNone
;
215 if (m_data
->GetDataSize() == 0) return (wxDragResult
) wxDragNone
;
217 GdkWindowPrivate
*wp
= (GdkWindowPrivate
*) m_widget
->window
;
221 gdk_dnd
.drag_perhaps
= TRUE
;
223 gdk_dnd
.dnd_drag_start
.x
= 5;
224 gdk_dnd
.dnd_drag_start
.y
= 5;
225 gdk_dnd
.real_sw
= wp
;
227 if (gdk_dnd
.drag_startwindows
)
229 g_free( gdk_dnd
.drag_startwindows
);
230 gdk_dnd
.drag_startwindows
= (GdkWindow
**) NULL
;
232 gdk_dnd
.drag_numwindows
= gdk_dnd
.drag_really
= 0;
234 XWindowAttributes dnd_winattr
;
235 XGetWindowAttributes( gdk_display
, wp
->xwindow
, &dnd_winattr
);
236 wp
->dnd_drag_savedeventmask
= dnd_winattr
.your_event_mask
;
238 gdk_dnd_drag_addwindow( m_widget
->window
);
240 GdkEventDragBegin ev
;
241 ev
.type
= GDK_DRAG_BEGIN
;
242 ev
.window
= m_widget
->window
;
244 ev
.u
.flags
.protocol_version
= DND_PROTOCOL_VERSION
;
246 gdk_event_put( (GdkEvent
*)&ev
);
248 XGrabPointer( gdk_display
, wp
->xwindow
, False
,
249 ButtonMotionMask
| ButtonPressMask
| ButtonReleaseMask
| PointerMotionMask
,
250 GrabModeAsync
, GrabModeAsync
, gdk_root_window
, None
, CurrentTime
);
252 gdk_dnd_set_drag_cursors( m_defaultCursor
.GetCursor(), m_goaheadCursor
.GetCursor() );
254 gdk_dnd
.dnd_grabbed
= TRUE
;
255 gdk_dnd
.drag_really
= 1;
259 gdk_window_get_pointer( m_widget
->window
, &x
, &y
, (GdkModifierType
*) NULL
);
261 gdk_dnd_display_drag_cursor( x
, y
, FALSE
, TRUE
);
263 while (gdk_dnd
.drag_really
|| gdk_dnd
.drag_perhaps
) wxYield();
267 g_blockEventsOnDrag
= FALSE
;
272 void wxDropSource::RegisterWindow(void)
278 wxDataFormat df
= m_data
->GetPreferredFormat();
283 formats
+= "text/plain";
286 formats
+= "file:ALL";
292 char *str
= WXSTRINGCAST formats
;
294 gtk_widget_dnd_drag_set( m_widget
, TRUE
, &str
, 1 );
296 gtk_signal_connect( GTK_OBJECT(m_widget
), "drag_request_event",
297 GTK_SIGNAL_FUNC(gtk_drag_callback
), (gpointer
)this );
300 void wxDropSource::UnregisterWindow(void)
302 if (!m_widget
) return;
304 gtk_widget_dnd_drag_set( m_widget
, FALSE
, (gchar
**) NULL
, 0 );
306 gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget
), (gpointer
)this );