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[wxWidgets.git] / src / gtk1 / dnd.cpp
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: dnd.cpp
3 // Purpose: wxDropTarget class
4 // Author: Robert Roebling
5 // Copyright: Robert Roebling
6 // Licence: wxWindows license
7 ///////////////////////////////////////////////////////////////////////////////
8
9 #ifdef __GNUG__
10 #pragma implementation "dnd.h"
11 #endif
12
13 #include "wx/dnd.h"
14 #include "wx/window.h"
15 #include "wx/app.h"
16 #include "wx/gdicmn.h"
17 #include <wx/intl.h>
18
19 #include "gdk/gdkprivate.h"
20
21 #include <X11/Xlib.h>
22
23 // ----------------------------------------------------------------------------
24 // global
25 // ----------------------------------------------------------------------------
26
27 extern bool g_blockEventsOnDrag;
28
29 // ----------------------------------------------------------------------------
30 // wxDropTarget
31 // ----------------------------------------------------------------------------
32
33 wxDropTarget::wxDropTarget()
34 {
35 };
36
37 wxDropTarget::~wxDropTarget()
38 {
39 };
40
41 void wxDropTarget::Drop( GdkEvent *event, int x, int y )
42 {
43 printf( "Drop data is of type %s.\n", event->dropdataavailable.data_type );
44
45 OnDrop( x, y, (char *)event->dropdataavailable.data);
46 };
47
48 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
49 {
50 if (!widget) return;
51
52 gtk_widget_dnd_drop_set( widget, FALSE, NULL, 0, FALSE );
53 };
54
55 void wxDropTarget::RegisterWidget( GtkWidget *widget )
56 {
57 wxString formats;
58 int valid = 0;
59
60 for ( uint i = 0; i < GetFormatCount(); i++ )
61 {
62 wxDataFormat df = GetFormat( i );
63 switch (df)
64 {
65 case wxDF_TEXT:
66 if (i > 0) formats += ";";
67 formats += "text/plain";
68 valid++;
69 break;
70 case wxDF_FILENAME:
71 if (i > 0) formats += ";";
72 formats += "url:any";
73 valid++;
74 break;
75 default:
76 break;
77 };
78 }
79
80 char *str = WXSTRINGCAST formats;
81
82 gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE );
83 };
84
85 // ----------------------------------------------------------------------------
86 // wxTextDropTarget
87 // ----------------------------------------------------------------------------
88
89 bool wxTextDropTarget::OnDrop( long x, long y, const void *pData )
90 {
91 OnDropText( x, y, (const char*)pData );
92 return TRUE;
93 };
94
95 bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
96 {
97 printf( "Got dropped text: %s.\n", psz );
98 printf( "At x: %d, y: %d.\n", (int)x, (int)y );
99 return TRUE;
100 };
101
102 size_t wxTextDropTarget::GetFormatCount() const
103 {
104 return 1;
105 }
106
107 wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
108 {
109 return wxDF_TEXT;
110 }
111
112 // ----------------------------------------------------------------------------
113 // wxFileDropTarget
114 // ----------------------------------------------------------------------------
115
116 bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const WXUNUSED(aszFiles)[] )
117 {
118 printf( "Got %d dropped files.\n", (int)nFiles );
119 printf( "At x: %d, y: %d.\n", (int)x, (int)y );
120 return TRUE;
121 }
122
123 bool wxFileDropTarget::OnDrop(long x, long y, const void *WXUNUSED(pData) )
124 {
125 char *str = "/this/is/a/path.txt";
126
127 return OnDropFiles(x, y, 1, &str );
128 }
129
130 size_t wxFileDropTarget::GetFormatCount() const
131 {
132 return 1;
133 }
134
135 wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
136 {
137 return wxDF_FILENAME;
138 }
139
140 //-------------------------------------------------------------------------
141 // wxDropSource
142 //-------------------------------------------------------------------------
143
144 //-----------------------------------------------------------------------------
145 // drag request
146
147 void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDataObject *data )
148 {
149 printf( "Data requested for dropping.\n" );
150
151 uint size = data->GetDataSize();
152 char *ptr = new char[size];
153 data->GetDataHere( ptr );
154
155 gtk_widget_dnd_data_set( widget, event, ptr, size );
156
157 delete ptr;
158 };
159
160 wxDropSource::wxDropSource( wxWindow *win )
161 {
162 g_blockEventsOnDrag = TRUE;
163
164 m_window = win;
165 m_widget = win->m_widget;
166 if (win->m_wxwindow) m_widget = win->m_wxwindow;
167
168 m_data = NULL;
169
170 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
171 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
172 };
173
174 wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
175 {
176 g_blockEventsOnDrag = TRUE;
177
178 m_window = win;
179 m_widget = win->m_widget;
180 if (win->m_wxwindow) m_widget = win->m_wxwindow;
181
182 m_data = &data;
183
184 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
185 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
186 };
187
188 void wxDropSource::SetData( wxDataObject &data )
189 {
190 m_data = &data;
191 };
192
193 wxDropSource::~wxDropSource(void)
194 {
195 // if (m_data) delete m_data;
196
197 g_blockEventsOnDrag = FALSE;
198 };
199
200 wxDropSource::DragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
201 {
202 if (gdk_dnd.dnd_grabbed) return None;
203 if (gdk_dnd.drag_really) return None;
204
205 if (!m_data) return None;
206 if (m_data->GetDataSize() == 0) return None;
207
208 GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window;
209
210 RegisterWindow();
211
212 gdk_dnd.drag_perhaps = TRUE;
213
214 gdk_dnd.dnd_drag_start.x = 5;
215 gdk_dnd.dnd_drag_start.y = 5;
216 gdk_dnd.real_sw = wp;
217
218 if (gdk_dnd.drag_startwindows)
219 {
220 g_free( gdk_dnd.drag_startwindows );
221 gdk_dnd.drag_startwindows = NULL;
222 };
223 gdk_dnd.drag_numwindows = gdk_dnd.drag_really = 0;
224
225 XWindowAttributes dnd_winattr;
226 XGetWindowAttributes( gdk_display, wp->xwindow, &dnd_winattr );
227 wp->dnd_drag_savedeventmask = dnd_winattr.your_event_mask;
228
229 gdk_dnd_drag_addwindow( m_widget->window );
230
231 GdkEventDragBegin ev;
232 ev.type = GDK_DRAG_BEGIN;
233 ev.window = m_widget->window;
234 ev.u.allflags = 0;
235 ev.u.flags.protocol_version = DND_PROTOCOL_VERSION;
236
237 gdk_event_put( (GdkEvent*)&ev );
238
239 XGrabPointer( gdk_display, wp->xwindow, False,
240 ButtonMotionMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
241 GrabModeAsync, GrabModeAsync, gdk_root_window, None, CurrentTime );
242
243 gdk_dnd_set_drag_cursors( m_defaultCursor.GetCursor(), m_goaheadCursor.GetCursor() );
244
245 gdk_dnd.dnd_grabbed = TRUE;
246 gdk_dnd.drag_really = 1;
247
248 int x = 0;
249 int y = 0;
250 gdk_window_get_pointer( m_widget->window, &x, &y, NULL );
251
252 gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE );
253
254 while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield();
255
256 UnregisterWindow();
257
258 return Copy;
259 };
260
261 void wxDropSource::RegisterWindow(void)
262 {
263 if (!m_data) return;
264
265 wxString formats;
266
267 wxDataFormat df = m_data->GetPreferredFormat();
268
269 switch (df)
270 {
271 case wxDF_TEXT:
272 formats += "text/plain";
273 break;
274 case wxDF_FILENAME:
275 formats += "url:any";
276 break;
277 default:
278 break;
279 }
280
281 char *str = WXSTRINGCAST formats;
282
283 gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 );
284
285 gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
286 GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)m_data );
287 };
288
289 void wxDropSource::UnregisterWindow(void)
290 {
291 if (!m_widget) return;
292
293 gtk_widget_dnd_drag_set( m_widget, FALSE, NULL, 0 );
294
295 gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)m_data );
296 };