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wxDropTarget starts to work
[wxWidgets.git] / src / gtk1 / dnd.cpp
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: dnd.cpp
3 // Purpose: wxDropTarget class
4 // Author: Robert Roebling
5 // Id: $Id$
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 ///////////////////////////////////////////////////////////////////////////////
9
10 #ifdef __GNUG__
11 #pragma implementation "dnd.h"
12 #endif
13
14 #include "wx/dnd.h"
15
16 #if wxUSE_DRAG_AND_DROP
17
18 #include "wx/window.h"
19 #include "wx/app.h"
20 #include "wx/gdicmn.h"
21 #include "wx/intl.h"
22 #include "wx/utils.h"
23
24 #include "gdk/gdk.h"
25 #include "gtk/gtk.h"
26 #include "gdk/gdkprivate.h"
27
28 #include <X11/Xlib.h>
29
30 //----------------------------------------------------------------------------
31 // global data
32 //----------------------------------------------------------------------------
33
34 extern bool g_blockEventsOnDrag;
35
36 //----------------------------------------------------------------------------
37 // standard icons
38 //----------------------------------------------------------------------------
39
40 /* XPM */
41 static char * gv_xpm[] = {
42 "40 34 3 1",
43 " s None c None",
44 ". c black",
45 "X c white",
46 " ",
47 " ",
48 " ...... ",
49 " ..XXXXXX.. ",
50 " .XXXXXXXXXX. ",
51 " .XXXXXXXXXXXX. ",
52 " .XXXXXXXXXXXX. ",
53 " .XXXXXXXXXXXXXX. ",
54 " .XXX..XXXX..XXX. ",
55 " ....XX....XX....XX. ",
56 " .XXX.XXX..XXXX..XXX.... ",
57 " .XXXXXXXXXXXXXXXXXXX.XXX. ",
58 " .XXXXXXXXXXXXXXXXXXXXXXXX. ",
59 " .XXXXXXXXXXXXXXXXXXXXXXXX. ",
60 " ..XXXXXXXXXXXXXXXXXXXXXX. ",
61 " .XXXXXXXXXXXXXXXXXX... ",
62 " ..XXXXXXXXXXXXXXXX. ",
63 " .XXXXXXXXXXXXXXXX. ",
64 " .XXXXXXXXXXXXXXXX. ",
65 " .XXXXXXXXXXXXXXXXX. ",
66 " .XXXXXXXXXXXXXXXXX. ",
67 " .XXXXXXXXXXXXXXXXXX. ",
68 " .XXXXXXXXXXXXXXXXXXX. ",
69 " .XXXXXXXXXXXXXXXXXXXXX. ",
70 " .XXXXXXXXXXXXXX.XXXXXXX. ",
71 " .XXXXXXX.XXXXXXX.XXXXXXX. ",
72 " .XXXXXXXX.XXXXXXX.XXXXXXX. ",
73 " .XXXXXXX...XXXXX...XXXXX. ",
74 " .XXXXXXX. ..... ..... ",
75 " ..XXXX.. ",
76 " .... ",
77 " ",
78 " ",
79 " "};
80
81 /* XPM */
82 static char * page_xpm[] = {
83 /* width height ncolors chars_per_pixel */
84 "32 32 5 1",
85 /* colors */
86 " s None c None",
87 ". c black",
88 "X c wheat",
89 "o c tan",
90 "O c #6699FF",
91 /* pixels */
92 " ................... ",
93 " .XXXXXXXXXXXXXXXXX.. ",
94 " .XXXXXXXXXXXXXXXXX.o. ",
95 " .XXXXXXXXXXXXXXXXX.oo. ",
96 " .XXXXXXXXXXXXXXXXX.ooo. ",
97 " .XXXXXXXXXXXXXXXXX.oooo. ",
98 " .XXXXXXXXXXXXXXXXX....... ",
99 " .XXXXXOOOOOOOOOOXXXooooo. ",
100 " .XXXXXXXXXXXXXXXXXXooooo. ",
101 " .XXXXXOOOOOOOOOOXXXXXXXX. ",
102 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
103 " .XXXXXXXOOOOOOOOOXXXXXXX. ",
104 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
105 " .XXXXXXOOOOOOOOOOXXXXXXX. ",
106 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
107 " .XXXXXOOOOOOOOOOXXXXXXXX. ",
108 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
109 " .XXXXXXXOOOOOOOOOXXXXXXX. ",
110 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
111 " .XXXXXXOOOOOOOOOOXXXXXXX. ",
112 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
113 " .XXXXXOOOOOOOOOOXXXXXXXX. ",
114 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
115 " .XXXXXXOOOOOOOOOOXXXXXXX. ",
116 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
117 " .XXXXXOOOOOOOXXXXXXXXXXX. ",
118 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
119 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
120 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
121 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
122 " .XXXXXXXXXXXXXXXXXXXXXXX. ",
123 " ......................... "};
124
125
126 #if (GTK_MINOR_VERSION > 0)
127
128 #include "gtk/gtkdnd.h"
129 #include "gtk/gtkselection.h"
130
131 // ----------------------------------------------------------------------------
132 // "drag_leave"
133 // ----------------------------------------------------------------------------
134
135 static void target_drag_leave( GtkWidget *WXUNUSED(widget),
136 GdkDragContext *context,
137 guint WXUNUSED(time),
138 wxDropTarget *drop_target )
139 {
140 /* inform the wxDropTarget about the current GdkDragContext.
141 this is only valid for the duration of this call */
142 drop_target->SetDragContext( context );
143
144 /* we don't need return values. this event is just for
145 information */
146 drop_target->OnLeave();
147
148 /* this has to be done because GDK has no "drag_enter" event */
149 drop_target->m_firstMotion = TRUE;
150
151 /* after this, invalidate the drop_target's GdkDragContext */
152 drop_target->SetDragContext( (GdkDragContext*) NULL );
153 }
154
155 // ----------------------------------------------------------------------------
156 // "drag_motion"
157 // ----------------------------------------------------------------------------
158
159 static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
160 GdkDragContext *context,
161 gint x,
162 gint y,
163 guint time,
164 wxDropTarget *drop_target )
165 {
166 /* Owen Taylor: "if the coordinates not in a drop zone,
167 return FALSE, otherwise call gtk_drag_status() and
168 return TRUE" */
169
170 /* inform the wxDropTarget about the current GdkDragContext.
171 this is only valid for the duration of this call */
172 drop_target->SetDragContext( context );
173
174 if (drop_target->m_firstMotion)
175 {
176 /* the first "drag_motion" event substitutes a "drag_enter" event */
177 drop_target->OnEnter();
178 }
179
180 /* give program a chance to react (i.e. to say no by returning FALSE) */
181 bool ret = drop_target->OnMove( x, y );
182
183 /* we don't yet handle which "actions" (i.e. copy or move)
184 the target accepts. so far we simply accept the
185 suggested action. TODO. */
186 if (ret)
187 gdk_drag_status( context, context->suggested_action, time );
188
189 /* after this, invalidate the drop_target's GdkDragContext */
190 drop_target->SetDragContext( (GdkDragContext*) NULL );
191
192 /* this has to be done because GDK has no "drag_enter" event */
193 drop_target->m_firstMotion = FALSE;
194
195 return ret;
196 }
197
198 // ----------------------------------------------------------------------------
199 // "drag_drop"
200 // ----------------------------------------------------------------------------
201
202 static gboolean target_drag_drop( GtkWidget *widget,
203 GdkDragContext *context,
204 gint x,
205 gint y,
206 guint time,
207 wxDropTarget *drop_target )
208 {
209 /* Owen Taylor: "if the drop is not in a drop zone,
210 return FALSE, otherwise, if you aren't accepting
211 the drop, call gtk_drag_finish() with success == FALSE
212 otherwise call gtk_drag_data_get()" */
213
214 /* this seems to make a difference between not accepting
215 due to wrong target area and due to wrong format. let
216 us hope that this is not required.. */
217
218 /* inform the wxDropTarget about the current GdkDragContext.
219 this is only valid for the duration of this call */
220 drop_target->SetDragContext( context );
221
222 /* inform the wxDropTarget about the current drag widget.
223 this is only valid for the duration of this call */
224 drop_target->SetDragWidget( widget );
225
226 /* inform the wxDropTarget about the current drag time.
227 this is only valid for the duration of this call */
228 drop_target->SetDragTime( time );
229
230 bool ret = drop_target->OnDrop( x, y );
231
232 if (ret)
233 {
234 /* this should trigger an "drag_data_received" event */
235 gtk_drag_get_data( widget,
236 context,
237 GPOINTER_TO_INT (context->targets->data),
238 time );
239 }
240 else
241 {
242 /* cancel the whole thing */
243 gtk_drag_finish( context,
244 FALSE, /* no success */
245 FALSE, /* don't delete data on dropping side */
246 time );
247 }
248
249 /* after this, invalidate the drop_target's GdkDragContext */
250 drop_target->SetDragContext( (GdkDragContext*) NULL );
251
252 /* after this, invalidate the drop_target's drag widget */
253 drop_target->SetDragWidget( (GtkWidget*) NULL );
254
255 /* this has to be done because GDK has no "drag_enter" event */
256 drop_target->m_firstMotion = TRUE;
257
258 return ret;
259 }
260
261 // ----------------------------------------------------------------------------
262 // "drag_data_received"
263 // ----------------------------------------------------------------------------
264
265 static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
266 GdkDragContext *context,
267 gint x,
268 gint y,
269 GtkSelectionData *data,
270 guint WXUNUSED(info),
271 guint time,
272 wxDropTarget *drop_target )
273 {
274 /* Owen Taylor: "call gtk_drag_finish() with
275 success == TRUE" */
276
277 /* strangely, we get a "drag_data_received" event even when
278 we don't request them. this checks this. */
279 if (!drop_target->m_currentDataObject) return;
280
281 wxDataObject *data_object = drop_target->m_currentDataObject;
282
283 if ((data->length <= 0) || (data->format != 8))
284 {
285 /* negative data length and non 8-bit data format
286 qualifies for junk */
287 gtk_drag_finish (context, FALSE, FALSE, time);
288 }
289 else
290 {
291 wxASSERT_MSG( data->target == data_object->GetFormat().GetAtom(), "DnD GetData target mismatch." );
292
293 if (data_object->GetFormat().GetType() == wxDF_TEXT)
294 {
295 wxTextDataObject *text_object = (wxTextDataObject*)data_object;
296 text_object->SetText( (const char*)data->data );
297 } else
298
299 if (data_object->GetFormat().GetType() == wxDF_FILENAME)
300 {
301 } else
302
303 if (data_object->GetFormat().GetType() == wxDF_PRIVATE)
304 {
305 wxPrivateDataObject *priv_object = (wxPrivateDataObject*)data_object;
306 priv_object->SetData( (const char*)data->data, (size_t)data->length );
307 }
308
309 /* tell wxDropTarget that data transfer was successfull */
310 drop_target->m_dataRetrieveSuccess = TRUE;
311
312 /* tell GTK that data transfer was successfull */
313 gtk_drag_finish( context, TRUE, FALSE, time );
314 }
315
316 /* tell wxDropTarget that data has arrived (or not) */
317 drop_target->m_waiting = FALSE;
318 }
319
320 // ----------------------------------------------------------------------------
321 // wxDropTarget
322 // ----------------------------------------------------------------------------
323
324 wxDropTarget::wxDropTarget()
325 {
326 m_firstMotion = TRUE;
327 m_dragContext = (GdkDragContext*) NULL;
328 m_dragWidget = (GtkWidget*) NULL;
329 m_dragTime = 0;
330 m_currentDataObject = (wxDataObject*) NULL;
331 m_dataRetrieveSuccess = FALSE;
332 }
333
334 wxDropTarget::~wxDropTarget()
335 {
336 }
337
338 void wxDropTarget::OnEnter()
339 {
340 }
341
342 void wxDropTarget::OnLeave()
343 {
344 }
345
346 bool wxDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
347 {
348 return TRUE;
349 }
350
351 bool wxDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) )
352 {
353 return FALSE;
354 }
355
356 bool wxDropTarget::IsSupported( wxDataFormat format )
357 {
358 if (!m_dragContext) return FALSE;
359
360 GList *child = m_dragContext->targets;
361 while (child)
362 {
363 GdkAtom formatAtom = (GdkAtom) GPOINTER_TO_INT(child->data);
364
365 /* char *name = gdk_atom_name( formatAtom );
366 if (name) printf( "Format available: %s.\n", name ); */
367
368 if (formatAtom == format.GetAtom()) return TRUE;
369 child = child->next;
370 }
371
372 return FALSE;
373 }
374
375 bool wxDropTarget::GetData( wxDataObject *data )
376 {
377 if (!m_dragContext) return FALSE;
378 if (!m_dragWidget) return FALSE;
379
380 m_currentDataObject = data;
381 m_dataRetrieveSuccess = FALSE;
382
383 /* this should trigger an "drag_data_received" event */
384 gtk_drag_get_data( m_dragWidget,
385 m_dragContext,
386 data->GetFormat().GetAtom(),
387 m_dragTime );
388
389 /* wait for the "drag_data_received" event */
390 m_waiting = TRUE;
391 while (m_waiting) gtk_main_iteration();
392
393 m_currentDataObject = (wxDataObject*) NULL;
394
395 return m_dataRetrieveSuccess;
396 }
397
398 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
399 {
400 wxCHECK_RET( widget != NULL, "unregister widget is NULL" );
401
402 gtk_drag_dest_unset( widget );
403
404 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
405 GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
406
407 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
408 GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
409
410 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
411 GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
412
413 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
414 GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
415 }
416
417 void wxDropTarget::RegisterWidget( GtkWidget *widget )
418 {
419 wxCHECK_RET( widget != NULL, "register widget is NULL" );
420
421 /* gtk_drag_dest_set() determines what default behaviour we'd like
422 GTK to supply. we don't want to specify out targets (=formats)
423 or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and
424 not GTK_DEST_DEFAULT_DROP). instead we react individually to
425 "drag_motion" and "drag_drop" events. this makes it possible
426 to allow dropping on only a small area. we should set
427 GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice
428 highlighting if dragging over standard controls, but this
429 seems to be broken without the other two. */
430
431 gtk_drag_dest_set( widget,
432 (GtkDestDefaults) 0, /* no default behaviour */
433 (GtkTargetEntry*) NULL, /* we don't supply any formats here */
434 0, /* number of targets = 0 */
435 (GdkDragAction) 0 ); /* we don't supply any actions here */
436
437 gtk_signal_connect( GTK_OBJECT(widget), "drag_leave",
438 GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
439
440 gtk_signal_connect( GTK_OBJECT(widget), "drag_motion",
441 GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
442
443 gtk_signal_connect( GTK_OBJECT(widget), "drag_drop",
444 GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
445
446 gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received",
447 GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
448 }
449
450 //-------------------------------------------------------------------------
451 // wxTextDropTarget
452 //-------------------------------------------------------------------------
453
454 bool wxTextDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
455 {
456 return IsSupported( wxDF_TEXT ); // same as "STRING"
457 }
458
459 bool wxTextDropTarget::OnDrop( int x, int y )
460 {
461 if (!IsSupported( wxDF_TEXT )) return FALSE;
462
463 wxTextDataObject data;
464 if (!GetData( &data )) return FALSE;
465
466 OnDropText( x, y, data.GetText() );
467 return TRUE;
468 }
469
470 //-------------------------------------------------------------------------
471 // wxPrivateDropTarget
472 //-------------------------------------------------------------------------
473
474 wxPrivateDropTarget::wxPrivateDropTarget()
475 {
476 m_id = wxTheApp->GetAppName();
477 }
478
479 wxPrivateDropTarget::wxPrivateDropTarget( const wxString &id )
480 {
481 m_id = id;
482 }
483
484 bool wxPrivateDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
485 {
486 return IsSupported( m_id );
487 }
488
489 bool wxPrivateDropTarget::OnDrop( int x, int y )
490 {
491 if (!IsSupported( m_id )) return FALSE;
492
493 wxPrivateDataObject data;
494 if (!GetData( &data )) return FALSE;
495
496 OnDropData( x, y, data.GetData(), data.GetSize() );
497
498 return TRUE;
499 }
500
501 //----------------------------------------------------------------------------
502 // A drop target which accepts files (dragged from File Manager or Explorer)
503 //----------------------------------------------------------------------------
504
505 bool wxFileDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
506 {
507 return IsSupported( wxDF_FILENAME ); // same as "file:ALL"
508 }
509
510 bool wxFileDropTarget::OnDrop( int x, int y )
511 {
512 return IsSupported( wxDF_FILENAME ); // same as "file:ALL"
513 }
514
515 void wxFileDropTarget::OnData( int x, int y )
516 {
517 wxFileDataObject data;
518 if (!GetData( &data )) return;
519
520 /* get number of substrings /root/mytext.txt/0/root/myothertext.txt/0/0 */
521 size_t number = 0;
522 size_t i;
523 size_t size = data.GetFiles().Length();
524 char *text = WXSTRINGCAST data.GetFiles();
525 for ( i = 0; i < size; i++)
526 if (text[i] == 0) number++;
527
528 if (number == 0) return;
529
530 char **files = new char*[number];
531
532 text = WXSTRINGCAST data.GetFiles();
533 for (i = 0; i < number; i++)
534 {
535 files[i] = text;
536 int len = strlen( text );
537 text += len+1;
538 }
539
540 OnDropFiles( x, y, number, files );
541
542 free( files );
543 }
544
545 //-------------------------------------------------------------------------
546 // wxDropSource
547 //-------------------------------------------------------------------------
548
549
550 wxDropSource::wxDropSource( wxWindow *win, const wxIcon &go, const wxIcon &stop )
551 {
552 g_blockEventsOnDrag = TRUE;
553
554 m_window = win;
555 m_widget = win->m_widget;
556 if (win->m_wxwindow) m_widget = win->m_wxwindow;
557
558 m_data = (wxDataBroker*) NULL;
559 m_retValue = wxDragCancel;
560
561 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
562 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
563
564 m_goIcon = go;
565 if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
566 m_stopIcon = stop;
567 if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
568 }
569
570 wxDropSource::wxDropSource( wxDataObject *data, wxWindow *win, const wxIcon &go, const wxIcon &stop )
571 {
572 g_blockEventsOnDrag = TRUE;
573
574 m_window = win;
575 m_widget = win->m_widget;
576 if (win->m_wxwindow) m_widget = win->m_wxwindow;
577 m_retValue = wxDragCancel;
578
579 if (data)
580 {
581 m_data = new wxDataBroker();
582 m_data->Add( data );
583 }
584 else
585 {
586 m_data = (wxDataBroker*) NULL;
587 }
588
589 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
590 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
591
592 m_goIcon = go;
593 if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
594 m_stopIcon = stop;
595 if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
596 }
597
598 wxDropSource::wxDropSource( wxDataBroker *data, wxWindow *win )
599 {
600 g_blockEventsOnDrag = TRUE;
601
602 m_window = win;
603 m_widget = win->m_widget;
604 if (win->m_wxwindow) m_widget = win->m_wxwindow;
605 m_retValue = wxDragCancel;
606
607 m_data = data;
608
609 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
610 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
611 }
612
613 void wxDropSource::SetData( wxDataObject *data )
614 {
615 if (m_data) delete m_data;
616
617 if (data)
618 {
619 m_data = new wxDataBroker();
620 m_data->Add( data );
621 }
622 else
623 {
624 m_data = (wxDataBroker*) NULL;
625 }
626 }
627
628 void wxDropSource::SetData( wxDataBroker *data )
629 {
630 if (m_data) delete m_data;
631
632 m_data = data;
633 }
634
635 wxDropSource::~wxDropSource(void)
636 {
637 if (m_data) delete m_data;
638
639 g_blockEventsOnDrag = FALSE;
640 }
641
642 wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
643 {
644 wxASSERT_MSG( m_data, "wxDragSource: no data" );
645
646 if (!m_data) return (wxDragResult) wxDragNone;
647
648 static GtkWidget *drag_icon = (GtkWidget*) NULL;
649 static GtkWidget *drop_icon = (GtkWidget*) NULL;
650
651 GdkPoint hotspot_1 = {0,-5 };
652
653 if (!drag_icon)
654 {
655 /*
656 drag_icon = shape_create_icon ( m_stopIcon,
657 440, 140, 0,0, GTK_WINDOW_POPUP);
658
659 gtk_signal_connect (GTK_OBJECT (drag_icon), "destroy",
660 GTK_SIGNAL_FUNC(gtk_widget_destroyed),
661 &drag_icon);
662
663 gtk_widget_hide (drag_icon);
664 */
665 }
666
667 GdkPoint hotspot_2 = {-5,-5};
668
669 if (!drop_icon)
670 {
671 /*
672 drop_icon = shape_create_icon ( m_goIcon,
673 440, 140, 0,0, GTK_WINDOW_POPUP);
674
675 gtk_signal_connect (GTK_OBJECT (drop_icon), "destroy",
676 GTK_SIGNAL_FUNC(gtk_widget_destroyed),
677 &drop_icon);
678
679 gtk_widget_hide (drop_icon);
680 */
681 }
682
683
684 return FALSE;
685 }
686
687 void wxDropSource::RegisterWindow(void)
688 {
689 if (!m_data) return;
690 }
691
692 void wxDropSource::UnregisterWindow(void)
693 {
694 if (!m_widget) return;
695 }
696
697
698 #else // NEW_CODE
699
700 //----------------------------------------------------------------------------
701 // forward
702 //----------------------------------------------------------------------------
703
704 GtkWidget *shape_create_icon ( const wxIcon &shape,
705 gint x,
706 gint y,
707 gint px,
708 gint py,
709 gint window_type);
710
711 //-----------------------------------------------------------------------------
712 // globals
713 //-----------------------------------------------------------------------------
714
715 wxDropSource *gs_currentDropSource = (wxDropSource*) NULL;
716
717 //-----------------------------------------------------------------------------
718 // "drop_enter_event"
719 //-----------------------------------------------------------------------------
720
721 static void gtk_target_enter_callback( GtkWidget *WXUNUSED(widget),
722 GdkEventDropEnter *WXUNUSED(event),
723 wxDropTarget *target )
724 {
725 if (target)
726 target->OnEnter();
727 }
728
729 //-----------------------------------------------------------------------------
730 // "drop_leave_event"
731 //-----------------------------------------------------------------------------
732
733 static void gtk_target_leave_callback( GtkWidget *WXUNUSED(widget),
734 GdkEventDropLeave *WXUNUSED(event),
735 wxDropTarget *target )
736 {
737 if (target)
738 target->OnLeave();
739 }
740
741 //-----------------------------------------------------------------------------
742 // "drop_data_available_event"
743 //-----------------------------------------------------------------------------
744
745 static void gtk_target_callback( GtkWidget *widget,
746 GdkEventDropDataAvailable *event,
747 wxDropTarget *target )
748 {
749 if (target)
750 {
751 int x = 0;
752 int y = 0;
753 gdk_window_get_pointer( widget->window, &x, &y, (GdkModifierType *) NULL );
754 /*
755 printf( "Drop data is of type %s.\n", event->data_type );
756 */
757 target->OnDrop( x, y, (const void*)event->data, (size_t)event->data_numbytes );
758 }
759
760 /*
761 g_free (event->data);
762 g_free (event->data_type);
763 */
764 }
765
766 // ----------------------------------------------------------------------------
767 // wxDropTarget
768 // ----------------------------------------------------------------------------
769
770 wxDropTarget::wxDropTarget()
771 {
772 m_format = (wxDataFormat*) NULL;
773 }
774
775 wxDropTarget::~wxDropTarget()
776 {
777 if (m_format) delete m_format;
778 }
779
780 wxDataFormat &wxDropTarget::GetFormat(size_t n) const
781 {
782 return (*m_format);
783 }
784
785 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
786 {
787 if (!widget) return;
788
789 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
790 GTK_SIGNAL_FUNC(gtk_target_callback), (gpointer) this );
791
792 gtk_widget_dnd_drop_set( widget, FALSE, (gchar **) NULL, 0, FALSE );
793 }
794
795 void wxDropTarget::RegisterWidget( GtkWidget *widget )
796 {
797 wxString formats;
798 int valid = 0;
799
800 for ( size_t i = 0; i < GetFormatCount(); i++ )
801 {
802 switch (GetFormat(i).GetType())
803 {
804 case wxDF_TEXT:
805 {
806 if (i > 0) formats += ";";
807 formats += "text/plain";
808 valid++;
809 break;
810 }
811 case wxDF_FILENAME:
812 {
813 if (i > 0) formats += ";";
814 formats += "file:ALL";
815 valid++;
816 break;
817 }
818 case wxDF_PRIVATE:
819 {
820 if (i > 0) formats += ";";
821 wxPrivateDropTarget *pdt = (wxPrivateDropTarget *)this;
822 formats += pdt->GetId();
823 valid++;
824 break;
825 }
826 default:
827 break;
828 }
829 }
830
831 char *str = WXSTRINGCAST formats;
832
833 gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE );
834
835 gtk_signal_connect( GTK_OBJECT(widget), "drop_data_available_event",
836 GTK_SIGNAL_FUNC(gtk_target_callback), (gpointer) this );
837
838 gtk_signal_connect( GTK_OBJECT(widget), "drop_enter_event",
839 GTK_SIGNAL_FUNC(gtk_target_enter_callback), (gpointer) this );
840
841 gtk_signal_connect( GTK_OBJECT(widget), "drop_leave_event",
842 GTK_SIGNAL_FUNC(gtk_target_leave_callback), (gpointer) this );
843 }
844
845 // ----------------------------------------------------------------------------
846 // wxTextDropTarget
847 // ----------------------------------------------------------------------------
848
849 wxTextDropTarget::wxTextDropTarget()
850 {
851 m_format = new wxDataFormat( wxDF_TEXT );
852 }
853
854 bool wxTextDropTarget::OnDrop( long x, long y, const void *data, size_t WXUNUSED(size) )
855 {
856 OnDropText( x, y, (const char*)data );
857 return TRUE;
858 }
859
860 bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
861 {
862 /*
863 printf( "Got dropped text: %s.\n", psz );
864 printf( "At x: %d, y: %d.\n", (int)x, (int)y );
865 */
866 return TRUE;
867 }
868
869 size_t wxTextDropTarget::GetFormatCount() const
870 {
871 return 1;
872 }
873
874 // ----------------------------------------------------------------------------
875 // wxPrivateDropTarget
876 // ----------------------------------------------------------------------------
877
878 wxPrivateDropTarget::wxPrivateDropTarget()
879 {
880 m_id = wxTheApp->GetAppName();
881 m_format = new wxDataFormat( m_id );
882 }
883
884 void wxPrivateDropTarget::SetId( const wxString& id )
885 {
886 m_id = id;
887 m_format->SetId( id );
888 }
889
890 size_t wxPrivateDropTarget::GetFormatCount() const
891 {
892 return 1;
893 }
894
895 // ----------------------------------------------------------------------------
896 // wxFileDropTarget
897 // ----------------------------------------------------------------------------
898
899 wxFileDropTarget::wxFileDropTarget()
900 {
901 m_format = new wxDataFormat( wxDF_FILENAME );
902 }
903
904 bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] )
905 {
906 printf( "Got %d dropped files.\n", (int)nFiles );
907 printf( "At x: %d, y: %d.\n", (int)x, (int)y );
908
909 for (size_t i = 0; i < nFiles; i++)
910 {
911 printf( aszFiles[i] );
912 printf( "\n" );
913 }
914
915 return TRUE;
916 }
917
918 bool wxFileDropTarget::OnDrop(long x, long y, const void *data, size_t size )
919 {
920 size_t number = 0;
921 size_t i;
922 char *text = (char*) data;
923 for ( i = 0; i < size; i++)
924 if (text[i] == 0) number++;
925
926 if (number == 0) return TRUE;
927
928 char **files = new char*[number];
929
930 text = (char*) data;
931 for (i = 0; i < number; i++)
932 {
933 files[i] = text;
934 int len = strlen( text );
935 text += len+1;
936 }
937
938 bool ret = OnDropFiles( x, y, 1, files );
939
940 free( files );
941
942 return ret;
943 }
944
945 size_t wxFileDropTarget::GetFormatCount() const
946 {
947 return 1;
948 }
949
950 //-------------------------------------------------------------------------
951 // wxDropSource
952 //-------------------------------------------------------------------------
953
954 static void
955 shape_motion (GtkWidget *widget,
956 GdkEventMotion * /*event*/);
957
958 //-----------------------------------------------------------------------------
959 // "drag_request_event"
960 //-----------------------------------------------------------------------------
961
962 void gtk_drag_callback( GtkWidget *widget, GdkEventDragRequest *event, wxDropSource *source )
963 {
964 wxDataBroker *data = source->m_data;
965
966 if (!data) return;
967
968 wxNode *node = data->m_dataObjects.First();
969 {
970 wxDataObject *dobj = (wxDataObject*) node->Data();
971
972 if ((strcmp(event->data_type,"file:ALL") == 0) &&
973 (dobj->GetFormat().GetType() == wxDF_FILENAME))
974 {
975 wxFileDataObject *file_object = (wxFileDataObject*) dobj;
976
977 wxString text = file_object->GetFiles();
978
979 char *s = WXSTRINGCAST text;
980
981 gtk_widget_dnd_data_set( widget,
982 (GdkEvent*)event,
983 (unsigned char*) s,
984 (int) text.Length()+1 );
985
986 source->m_retValue = wxDragCopy;
987
988 return;
989 }
990
991 if ((strcmp(event->data_type,"text/plain") == 0) &&
992 (dobj->GetFormat().GetType() == wxDF_TEXT))
993 {
994 wxTextDataObject *text_object = (wxTextDataObject*) dobj;
995
996 wxString text = text_object->GetText();
997
998 char *s = WXSTRINGCAST text;
999
1000 gtk_widget_dnd_data_set( widget,
1001 (GdkEvent*)event,
1002 (unsigned char*) s,
1003 (int) text.Length()+1 );
1004
1005 source->m_retValue = wxDragCopy;
1006
1007 return;
1008 }
1009
1010 if (dobj->GetFormat().GetType() == wxDF_PRIVATE)
1011 {
1012 wxPrivateDataObject *pdo = (wxPrivateDataObject*) dobj;
1013
1014 if (pdo->GetId() == event->data_type)
1015 {
1016 gtk_widget_dnd_data_set( widget,
1017 (GdkEvent*)event,
1018 (unsigned char*) pdo->GetData(),
1019 (int) pdo->GetSize() );
1020
1021 source->m_retValue = wxDragCopy;
1022
1023 return;
1024 }
1025 }
1026
1027 node = node->Next();
1028 }
1029 }
1030
1031 wxDropSource::wxDropSource( wxWindow *win, const wxIcon &go, const wxIcon &stop )
1032 {
1033 g_blockEventsOnDrag = TRUE;
1034
1035 m_window = win;
1036 m_widget = win->m_widget;
1037 if (win->m_wxwindow) m_widget = win->m_wxwindow;
1038
1039 m_data = (wxDataBroker*) NULL;
1040 m_retValue = wxDragCancel;
1041
1042 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
1043 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
1044
1045 m_goIcon = go;
1046 if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
1047 m_stopIcon = stop;
1048 if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
1049 }
1050
1051 wxDropSource::wxDropSource( wxDataObject *data, wxWindow *win, const wxIcon &go, const wxIcon &stop )
1052 {
1053 g_blockEventsOnDrag = TRUE;
1054
1055 m_window = win;
1056 m_widget = win->m_widget;
1057 if (win->m_wxwindow) m_widget = win->m_wxwindow;
1058 m_retValue = wxDragCancel;
1059
1060 if (data)
1061 {
1062 m_data = new wxDataBroker();
1063 m_data->Add( data );
1064 }
1065 else
1066 {
1067 m_data = (wxDataBroker*) NULL;
1068 }
1069
1070 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
1071 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
1072
1073 m_goIcon = go;
1074 if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm );
1075 m_stopIcon = stop;
1076 if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm );
1077 }
1078
1079 wxDropSource::wxDropSource( wxDataBroker *data, wxWindow *win )
1080 {
1081 g_blockEventsOnDrag = TRUE;
1082
1083 m_window = win;
1084 m_widget = win->m_widget;
1085 if (win->m_wxwindow) m_widget = win->m_wxwindow;
1086 m_retValue = wxDragCancel;
1087
1088 m_data = data;
1089
1090 m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
1091 m_goaheadCursor = wxCursor( wxCURSOR_HAND );
1092 }
1093
1094 void wxDropSource::SetData( wxDataObject *data )
1095 {
1096 if (m_data) delete m_data;
1097
1098 if (data)
1099 {
1100 m_data = new wxDataBroker();
1101 m_data->Add( data );
1102 }
1103 else
1104 {
1105 m_data = (wxDataBroker*) NULL;
1106 }
1107 }
1108
1109 void wxDropSource::SetData( wxDataBroker *data )
1110 {
1111 if (m_data) delete m_data;
1112
1113 m_data = data;
1114 }
1115
1116 wxDropSource::~wxDropSource(void)
1117 {
1118 if (m_data) delete m_data;
1119
1120 g_blockEventsOnDrag = FALSE;
1121 }
1122
1123 wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
1124 {
1125 if (gdk_dnd.dnd_grabbed) return (wxDragResult) wxDragNone;
1126 if (gdk_dnd.drag_really) return (wxDragResult) wxDragNone;
1127
1128 wxASSERT_MSG( m_data, "wxDragSource: no data" );
1129
1130 if (!m_data) return (wxDragResult) wxDragNone;
1131
1132 static GtkWidget *drag_icon = (GtkWidget*) NULL;
1133 static GtkWidget *drop_icon = (GtkWidget*) NULL;
1134
1135 GdkPoint hotspot_1 = {0,-5 };
1136
1137 if (!drag_icon)
1138 {
1139 drag_icon = shape_create_icon ( m_stopIcon,
1140 440, 140, 0,0, GTK_WINDOW_POPUP);
1141
1142 gtk_signal_connect (GTK_OBJECT (drag_icon), "destroy",
1143 GTK_SIGNAL_FUNC(gtk_widget_destroyed),
1144 &drag_icon);
1145
1146 gtk_widget_hide (drag_icon);
1147 }
1148
1149 GdkPoint hotspot_2 = {-5,-5};
1150
1151 if (!drop_icon)
1152 {
1153 drop_icon = shape_create_icon ( m_goIcon,
1154 440, 140, 0,0, GTK_WINDOW_POPUP);
1155
1156 gtk_signal_connect (GTK_OBJECT (drop_icon), "destroy",
1157 GTK_SIGNAL_FUNC(gtk_widget_destroyed),
1158 &drop_icon);
1159
1160 gtk_widget_hide (drop_icon);
1161 }
1162
1163
1164 gdk_dnd_set_drag_shape( drag_icon->window,
1165 &hotspot_1,
1166 drop_icon->window,
1167 &hotspot_2);
1168
1169
1170 GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window;
1171
1172 RegisterWindow();
1173
1174 gdk_dnd.drag_perhaps = TRUE;
1175
1176 gdk_dnd.dnd_drag_start.x = 5;
1177 gdk_dnd.dnd_drag_start.y = 5;
1178 gdk_dnd.real_sw = wp;
1179
1180 if (gdk_dnd.drag_startwindows)
1181 {
1182 g_free( gdk_dnd.drag_startwindows );
1183 gdk_dnd.drag_startwindows = (GdkWindow **) NULL;
1184 }
1185 gdk_dnd.drag_numwindows = gdk_dnd.drag_really = 0;
1186
1187 XWindowAttributes dnd_winattr;
1188 XGetWindowAttributes( gdk_display, wp->xwindow, &dnd_winattr );
1189 wp->dnd_drag_savedeventmask = dnd_winattr.your_event_mask;
1190
1191 gdk_dnd_drag_addwindow( m_widget->window );
1192
1193 GdkEventDragBegin ev;
1194 ev.type = GDK_DRAG_BEGIN;
1195 ev.window = m_widget->window;
1196 ev.u.allflags = 0;
1197 ev.u.flags.protocol_version = DND_PROTOCOL_VERSION;
1198
1199 gdk_event_put( (GdkEvent*)&ev );
1200
1201 XGrabPointer( gdk_display, wp->xwindow, False,
1202 ButtonMotionMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
1203 GrabModeAsync, GrabModeAsync, gdk_root_window, None, CurrentTime );
1204
1205 gdk_dnd_set_drag_cursors( m_defaultCursor.GetCursor(), m_goaheadCursor.GetCursor() );
1206
1207 gdk_dnd.dnd_grabbed = TRUE;
1208 gdk_dnd.drag_really = 1;
1209
1210 int x = 0;
1211 int y = 0;
1212 wxGetMousePosition( &x, &y );
1213
1214 gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE );
1215
1216 gs_currentDropSource = this;
1217
1218 while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield();
1219
1220 gs_currentDropSource = (wxDropSource*) NULL;
1221
1222 UnregisterWindow();
1223
1224 g_blockEventsOnDrag = FALSE;
1225
1226 return m_retValue;
1227 }
1228
1229 void wxDropSource::RegisterWindow(void)
1230 {
1231 if (!m_data) return;
1232
1233 wxString formats;
1234
1235 wxNode *node = m_data->m_dataObjects.First();
1236 while (node)
1237 {
1238 wxDataObject* dobj = (wxDataObject*) node->Data();
1239
1240 switch (dobj->GetFormat().GetType())
1241 {
1242 case wxDF_TEXT:
1243 {
1244 formats += "text/plain";
1245 break;
1246 }
1247 case wxDF_FILENAME:
1248 {
1249 formats += "file:ALL";
1250 break;
1251 }
1252 case wxDF_PRIVATE:
1253 {
1254 wxPrivateDataObject* pdo = (wxPrivateDataObject*) m_data;
1255 formats += pdo->GetId();
1256 break;
1257 }
1258 default:
1259 break;
1260 }
1261 node = node->Next();
1262 }
1263
1264 char *str = WXSTRINGCAST formats;
1265
1266 gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 );
1267
1268 gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
1269 GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this );
1270 }
1271
1272 void wxDropSource::UnregisterWindow(void)
1273 {
1274 if (!m_widget) return;
1275
1276 gtk_widget_dnd_drag_set( m_widget, FALSE, (gchar **) NULL, 0 );
1277
1278 gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this );
1279 }
1280
1281
1282 /*
1283 * Shaped Windows
1284 */
1285 static GdkWindow *root_win = (GdkWindow*) NULL;
1286
1287 typedef struct _cursoroffset {gint x,y;} CursorOffset;
1288
1289 static void
1290 shape_pressed (GtkWidget *widget, GdkEventButton *event)
1291 {
1292 CursorOffset *p;
1293
1294 /* ignore double and triple click */
1295 if (event->type != GDK_BUTTON_PRESS)
1296 return;
1297
1298 p = (CursorOffset *)gtk_object_get_user_data (GTK_OBJECT(widget));
1299 p->x = (int) event->x;
1300 p->y = (int) event->y;
1301
1302 gtk_grab_add (widget);
1303 gdk_pointer_grab (widget->window, TRUE,
1304 (GdkEventMask)
1305 (GDK_BUTTON_RELEASE_MASK |
1306 GDK_BUTTON_MOTION_MASK |
1307 GDK_POINTER_MOTION_HINT_MASK),
1308 (GdkWindow*)NULL,
1309 (GdkCursor*) NULL, 0);
1310 }
1311
1312
1313 static void
1314 shape_released (GtkWidget *widget)
1315 {
1316 gtk_grab_remove (widget);
1317 gdk_pointer_ungrab (0);
1318 }
1319
1320 static void
1321 shape_motion (GtkWidget *widget,
1322 GdkEventMotion * /*event*/ )
1323 {
1324 gint xp, yp;
1325 CursorOffset * p;
1326 GdkModifierType mask;
1327
1328 p = (CursorOffset *)gtk_object_get_user_data (GTK_OBJECT (widget));
1329
1330 /*
1331 * Can't use event->x / event->y here
1332 * because I need absolute coordinates.
1333 */
1334
1335 gdk_window_get_pointer (root_win, &xp, &yp, &mask);
1336 gtk_widget_set_uposition (widget, xp - p->x, yp - p->y);
1337
1338 if (gs_currentDropSource) gs_currentDropSource->GiveFeedback( wxDragCopy, FALSE );
1339 }
1340
1341 GtkWidget *
1342 shape_create_icon (const wxIcon &shape,
1343 gint x,
1344 gint y,
1345 gint px,
1346 gint py,
1347 gint window_type)
1348 {
1349 /*
1350 * GDK_WINDOW_TOPLEVEL works also, giving you a title border
1351 */
1352 GtkWidget *window = gtk_window_new ((GtkWindowType)window_type);
1353
1354 GtkWidget *fixed = gtk_fixed_new ();
1355 gtk_widget_set_usize (fixed, 100,100);
1356 gtk_container_add (GTK_CONTAINER (window), fixed);
1357 gtk_widget_show (fixed);
1358
1359 gtk_widget_set_events (window,
1360 gtk_widget_get_events (window) |
1361 GDK_BUTTON_MOTION_MASK |
1362 GDK_POINTER_MOTION_HINT_MASK |
1363 GDK_BUTTON_PRESS_MASK);
1364
1365 gtk_widget_realize (window);
1366
1367 GdkBitmap *mask = (GdkBitmap*) NULL;
1368 if (shape.GetMask()) mask = shape.GetMask()->GetBitmap();
1369
1370 GtkWidget *pixmap = gtk_pixmap_new (shape.GetPixmap(), mask);
1371 gtk_fixed_put (GTK_FIXED (fixed), pixmap, px,py);
1372 gtk_widget_show (pixmap);
1373
1374 gtk_widget_shape_combine_mask (window, mask, px,py);
1375
1376
1377 gtk_signal_connect (GTK_OBJECT (window), "button_press_event",
1378 GTK_SIGNAL_FUNC (shape_pressed),NULL);
1379 gtk_signal_connect (GTK_OBJECT (window), "button_release_event",
1380 GTK_SIGNAL_FUNC (shape_released),NULL);
1381 gtk_signal_connect (GTK_OBJECT (window), "motion_notify_event",
1382 GTK_SIGNAL_FUNC (shape_motion),NULL);
1383
1384 CursorOffset*icon_pos = g_new (CursorOffset, 1);
1385 gtk_object_set_user_data(GTK_OBJECT(window), icon_pos);
1386
1387 gtk_widget_set_uposition (window, x, y);
1388 gtk_widget_show (window);
1389
1390 return window;
1391 }
1392
1393 #endif
1394 // NEW_GTK_DND_CODE
1395
1396 #endif
1397
1398 // wxUSE_DRAG_AND_DROP
wxWidgets (Impactor)