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Fixed premature exit of helpview sample and utility
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1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/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 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #if wxUSE_DRAG_AND_DROP
14
15 #include "wx/dnd.h"
16
17 #ifndef WX_PRECOMP
18 #include "wx/intl.h"
19 #include "wx/log.h"
20 #include "wx/app.h"
21 #include "wx/utils.h"
22 #include "wx/window.h"
23 #include "wx/gdicmn.h"
24 #endif
25
26 #include "wx/gtk/private.h"
27
28 #include <gdk/gdkprivate.h>
29
30 #include <gtk/gtkdnd.h>
31 #include <gtk/gtkselection.h>
32
33 //----------------------------------------------------------------------------
34 // global data
35 //----------------------------------------------------------------------------
36
37 extern bool g_blockEventsOnDrag;
38
39 // the flags used for the last DoDragDrop()
40 static long gs_flagsForDrag = 0;
41
42 #ifdef __WXDEBUG__
43 // the trace mask we use with wxLogTrace() - call
44 // wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here
45 // (there are quite a few of them, so don't enable this by default)
46 static const wxChar *TRACE_DND = _T("dnd");
47 #endif
48
49 // global variables because GTK+ DnD want to have the
50 // mouse event that caused it
51 extern GdkEvent *g_lastMouseEvent;
52 extern int g_lastButtonNumber;
53
54 //----------------------------------------------------------------------------
55 // standard icons
56 //----------------------------------------------------------------------------
57
58 /* Copyright (c) Julian Smart */
59 static const char * page_xpm[] = {
60 /* columns rows colors chars-per-pixel */
61 "32 32 37 1",
62 "5 c #7198D9",
63 ", c #769CDA",
64 "2 c #DCE6F6",
65 "i c #FFFFFF",
66 "e c #779DDB",
67 ": c #9AB6E4",
68 "9 c #EAF0FA",
69 "- c #B1C7EB",
70 "$ c #6992D7",
71 "y c #F7F9FD",
72 "= c #BED0EE",
73 "q c #F0F5FC",
74 "; c #A8C0E8",
75 "@ c #366BC2",
76 " c None",
77 "u c #FDFEFF",
78 "8 c #5987D3",
79 "* c #C4D5F0",
80 "7 c #7CA0DC",
81 "O c #487BCE",
82 "< c #6B94D7",
83 "& c #CCDAF2",
84 "> c #89A9DF",
85 "3 c #5584D1",
86 "w c #82A5DE",
87 "1 c #3F74CB",
88 "+ c #3A70CA",
89 ". c #3569BF",
90 "% c #D2DFF4",
91 "# c #3366BB",
92 "r c #F5F8FD",
93 "0 c #FAFCFE",
94 "4 c #DFE8F7",
95 "X c #5E8AD4",
96 "o c #5282D0",
97 "t c #B8CCEC",
98 "6 c #E5EDF9",
99 /* pixels */
100 " ",
101 " ",
102 " ",
103 " ",
104 " ",
105 " .XXXooOO++@# ",
106 " $%&*=-;::>,<1 ",
107 " $2%&*=-;::><:3 ",
108 " $42%&*=-;::<&:3 ",
109 " 56477<<<<8<<9&:X ",
110 " 59642%&*=-;<09&:5 ",
111 " 5q9642%&*=-<<<<<# ",
112 " 5qqw777<<<<<88:>+ ",
113 " erqq9642%&*=t;::+ ",
114 " eyrqq9642%&*=t;:O ",
115 " eyywwww777<<<<t;O ",
116 " e0yyrqq9642%&*=to ",
117 " e00yyrqq9642%&*=o ",
118 " eu0wwwwwww777<&*X ",
119 " euu00yyrqq9642%&X ",
120 " eiuu00yyrqq9642%X ",
121 " eiiwwwwwwwwww742$ ",
122 " eiiiuu00yyrqq964$ ",
123 " eiiiiuu00yyrqq96$ ",
124 " eiiiiiuu00yyrqq95 ",
125 " eiiiiiiuu00yyrqq5 ",
126 " eeeeeeeeeeeeee55e ",
127 " ",
128 " ",
129 " ",
130 " ",
131 " "
132 };
133
134
135 // ============================================================================
136 // private functions
137 // ============================================================================
138
139 // ----------------------------------------------------------------------------
140 // convert between GTK+ and wxWidgets DND constants
141 // ----------------------------------------------------------------------------
142
143 static wxDragResult ConvertFromGTK(long action)
144 {
145 switch ( action )
146 {
147 case GDK_ACTION_COPY:
148 return wxDragCopy;
149
150 case GDK_ACTION_LINK:
151 return wxDragLink;
152
153 case GDK_ACTION_MOVE:
154 return wxDragMove;
155 }
156
157 return wxDragNone;
158 }
159
160 // ----------------------------------------------------------------------------
161 // "drag_leave"
162 // ----------------------------------------------------------------------------
163
164 extern "C" {
165 static void target_drag_leave( GtkWidget *WXUNUSED(widget),
166 GdkDragContext *context,
167 guint WXUNUSED(time),
168 wxDropTarget *drop_target )
169 {
170 if (g_isIdle) wxapp_install_idle_handler();
171
172 /* inform the wxDropTarget about the current GdkDragContext.
173 this is only valid for the duration of this call */
174 drop_target->SetDragContext( context );
175
176 /* we don't need return values. this event is just for
177 information */
178 drop_target->OnLeave();
179
180 /* this has to be done because GDK has no "drag_enter" event */
181 drop_target->m_firstMotion = true;
182
183 /* after this, invalidate the drop_target's GdkDragContext */
184 drop_target->SetDragContext( (GdkDragContext*) NULL );
185 }
186 }
187
188 // ----------------------------------------------------------------------------
189 // "drag_motion"
190 // ----------------------------------------------------------------------------
191
192 extern "C" {
193 static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
194 GdkDragContext *context,
195 gint x,
196 gint y,
197 guint time,
198 wxDropTarget *drop_target )
199 {
200 if (g_isIdle) wxapp_install_idle_handler();
201
202 /* Owen Taylor: "if the coordinates not in a drop zone,
203 return FALSE, otherwise call gtk_drag_status() and
204 return TRUE" */
205
206 /* inform the wxDropTarget about the current GdkDragContext.
207 this is only valid for the duration of this call */
208 drop_target->SetDragContext( context );
209
210 // GTK+ always supposes that we want to copy the data by default while we
211 // might want to move it, so examine not only suggested_action - which is
212 // only good if we don't have our own preferences - but also the actions
213 // field
214 wxDragResult result;
215 if (drop_target->GetDefaultAction() == wxDragNone)
216 {
217 // use default action set by wxDropSource::DoDragDrop()
218 if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove &&
219 (context->actions & GDK_ACTION_MOVE ) )
220 {
221 // move is requested by the program and allowed by GTK+ - do it, even
222 // though suggested_action may be currently wxDragCopy
223 result = wxDragMove;
224 }
225 else // use whatever GTK+ says we should
226 {
227 result = ConvertFromGTK(context->suggested_action);
228
229 if ( (result == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) )
230 {
231 // we're requested to move but we can't
232 result = wxDragCopy;
233 }
234 }
235 }
236 else if (drop_target->GetDefaultAction() == wxDragMove &&
237 (context->actions & GDK_ACTION_MOVE))
238 {
239 result = wxDragMove;
240 }
241 else
242 {
243 if (context->actions & GDK_ACTION_COPY)
244 result = wxDragCopy;
245 else if (context->actions & GDK_ACTION_MOVE)
246 result = wxDragMove;
247 else
248 result = wxDragNone;
249 }
250
251 if (drop_target->m_firstMotion)
252 {
253 /* the first "drag_motion" event substitutes a "drag_enter" event */
254 result = drop_target->OnEnter( x, y, result );
255 }
256 else
257 {
258 /* give program a chance to react (i.e. to say no by returning FALSE) */
259 result = drop_target->OnDragOver( x, y, result );
260 }
261
262 bool ret = wxIsDragResultOk( result );
263 if (ret)
264 {
265 GdkDragAction action;
266 if (result == wxDragCopy)
267 action = GDK_ACTION_COPY;
268 else if (result == wxDragLink)
269 action = GDK_ACTION_LINK;
270 else
271 action = GDK_ACTION_MOVE;
272
273 gdk_drag_status( context, action, time );
274 }
275
276 /* after this, invalidate the drop_target's GdkDragContext */
277 drop_target->SetDragContext( (GdkDragContext*) NULL );
278
279 /* this has to be done because GDK has no "drag_enter" event */
280 drop_target->m_firstMotion = false;
281
282 return ret;
283 }
284 }
285
286 // ----------------------------------------------------------------------------
287 // "drag_drop"
288 // ----------------------------------------------------------------------------
289
290 extern "C" {
291 static gboolean target_drag_drop( GtkWidget *widget,
292 GdkDragContext *context,
293 gint x,
294 gint y,
295 guint time,
296 wxDropTarget *drop_target )
297 {
298 if (g_isIdle) wxapp_install_idle_handler();
299
300 /* Owen Taylor: "if the drop is not in a drop zone,
301 return FALSE, otherwise, if you aren't accepting
302 the drop, call gtk_drag_finish() with success == FALSE
303 otherwise call gtk_drag_data_get()" */
304
305 // printf( "drop.\n" );
306
307 /* this seems to make a difference between not accepting
308 due to wrong target area and due to wrong format. let
309 us hope that this is not required.. */
310
311 /* inform the wxDropTarget about the current GdkDragContext.
312 this is only valid for the duration of this call */
313 drop_target->SetDragContext( context );
314
315 /* inform the wxDropTarget about the current drag widget.
316 this is only valid for the duration of this call */
317 drop_target->SetDragWidget( widget );
318
319 /* inform the wxDropTarget about the current drag time.
320 this is only valid for the duration of this call */
321 drop_target->SetDragTime( time );
322
323 /*
324 wxDragResult result = wxDragMove;
325 if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy;
326 */
327
328 /* reset the block here as someone might very well
329 show a dialog as a reaction to a drop and this
330 wouldn't work without events */
331 g_blockEventsOnDrag = false;
332
333 bool ret = drop_target->OnDrop( x, y );
334
335 if (!ret)
336 {
337 #ifdef __WXDEBUG__
338 wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
339 #endif
340
341 /* cancel the whole thing */
342 gtk_drag_finish( context,
343 FALSE, /* no success */
344 FALSE, /* don't delete data on dropping side */
345 time );
346 }
347 else
348 {
349 #ifdef __WXDEBUG__
350 wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") );
351 #endif
352
353 #if wxUSE_THREADS
354 /* disable GUI threads */
355 #endif
356
357 GdkAtom format = drop_target->GetMatchingPair();
358
359 // this does happen somehow, see bug 555111
360 wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") );
361
362 /*
363 GdkDragAction action = GDK_ACTION_MOVE;
364 if (result == wxDragCopy) action == GDK_ACTION_COPY;
365 context->action = action;
366 */
367 /* this should trigger an "drag_data_received" event */
368 gtk_drag_get_data( widget,
369 context,
370 format,
371 time );
372
373 #if wxUSE_THREADS
374 /* re-enable GUI threads */
375 #endif
376 }
377
378 /* after this, invalidate the drop_target's GdkDragContext */
379 drop_target->SetDragContext( (GdkDragContext*) NULL );
380
381 /* after this, invalidate the drop_target's drag widget */
382 drop_target->SetDragWidget( (GtkWidget*) NULL );
383
384 /* this has to be done because GDK has no "drag_enter" event */
385 drop_target->m_firstMotion = true;
386
387 return ret;
388 }
389 }
390
391 // ----------------------------------------------------------------------------
392 // "drag_data_received"
393 // ----------------------------------------------------------------------------
394
395 extern "C" {
396 static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
397 GdkDragContext *context,
398 gint x,
399 gint y,
400 GtkSelectionData *data,
401 guint WXUNUSED(info),
402 guint time,
403 wxDropTarget *drop_target )
404 {
405 if (g_isIdle) wxapp_install_idle_handler();
406
407 /* Owen Taylor: "call gtk_drag_finish() with
408 success == TRUE" */
409
410 if ((data->length <= 0) || (data->format != 8))
411 {
412 /* negative data length and non 8-bit data format
413 qualifies for junk */
414 gtk_drag_finish (context, FALSE, FALSE, time);
415
416 return;
417 }
418
419 #ifdef __WXDEBUG__
420 wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") );
421 #endif
422
423 /* inform the wxDropTarget about the current GtkSelectionData.
424 this is only valid for the duration of this call */
425 drop_target->SetDragData( data );
426
427 wxDragResult result = ConvertFromGTK(context->action);
428
429 if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
430 {
431 #ifdef __WXDEBUG__
432 wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") );
433 #endif
434
435 /* tell GTK that data transfer was successful */
436 gtk_drag_finish( context, TRUE, FALSE, time );
437 }
438 else
439 {
440 #ifdef __WXDEBUG__
441 wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") );
442 #endif
443
444 /* tell GTK that data transfer was not successful */
445 gtk_drag_finish( context, FALSE, FALSE, time );
446 }
447
448 /* after this, invalidate the drop_target's drag data */
449 drop_target->SetDragData( (GtkSelectionData*) NULL );
450 }
451 }
452
453 //----------------------------------------------------------------------------
454 // wxDropTarget
455 //----------------------------------------------------------------------------
456
457 wxDropTarget::wxDropTarget( wxDataObject *data )
458 : wxDropTargetBase( data )
459 {
460 m_firstMotion = true;
461 m_dragContext = (GdkDragContext*) NULL;
462 m_dragWidget = (GtkWidget*) NULL;
463 m_dragData = (GtkSelectionData*) NULL;
464 m_dragTime = 0;
465 }
466
467 wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
468 wxCoord WXUNUSED(y),
469 wxDragResult def )
470 {
471 // GetMatchingPair() checks for m_dataObject too, no need to do it here
472
473 // disable the debug message from GetMatchingPair() - there are too many
474 // of them otherwise
475 #ifdef __WXDEBUG__
476 wxLogNull noLog;
477 #endif // Debug
478
479 return (GetMatchingPair() != (GdkAtom) 0) ? def : wxDragNone;
480 }
481
482 bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
483 {
484 if (!m_dataObject)
485 return false;
486
487 return (GetMatchingPair() != (GdkAtom) 0);
488 }
489
490 wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
491 wxDragResult def )
492 {
493 if (!m_dataObject)
494 return wxDragNone;
495
496 if (GetMatchingPair() == (GdkAtom) 0)
497 return wxDragNone;
498
499 return GetData() ? def : wxDragNone;
500 }
501
502 GdkAtom wxDropTarget::GetMatchingPair()
503 {
504 if (!m_dataObject)
505 return (GdkAtom) 0;
506
507 if (!m_dragContext)
508 return (GdkAtom) 0;
509
510 GList *child = m_dragContext->targets;
511 while (child)
512 {
513 GdkAtom formatAtom = (GdkAtom)(child->data);
514 wxDataFormat format( formatAtom );
515
516 #ifdef __WXDEBUG__
517 wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"),
518 format.GetId().c_str());
519 #endif // Debug
520
521 if (m_dataObject->IsSupportedFormat( format ))
522 return formatAtom;
523
524 child = child->next;
525 }
526
527 return (GdkAtom) 0;
528 }
529
530 bool wxDropTarget::GetData()
531 {
532 if (!m_dragData)
533 return false;
534
535 if (!m_dataObject)
536 return false;
537
538 wxDataFormat dragFormat( m_dragData->target );
539
540 if (!m_dataObject->IsSupportedFormat( dragFormat ))
541 return false;
542
543 m_dataObject->SetData( dragFormat, (size_t)m_dragData->length, (const void*)m_dragData->data );
544
545 return true;
546 }
547
548 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
549 {
550 wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") );
551
552 gtk_drag_dest_unset( widget );
553
554 g_signal_handlers_disconnect_by_func (widget,
555 (gpointer) target_drag_leave, this);
556 g_signal_handlers_disconnect_by_func (widget,
557 (gpointer) target_drag_motion, this);
558 g_signal_handlers_disconnect_by_func (widget,
559 (gpointer) target_drag_drop, this);
560 g_signal_handlers_disconnect_by_func (widget,
561 (gpointer) target_drag_data_received, this);
562 }
563
564 void wxDropTarget::RegisterWidget( GtkWidget *widget )
565 {
566 wxCHECK_RET( widget != NULL, wxT("register widget is NULL") );
567
568 /* gtk_drag_dest_set() determines what default behaviour we'd like
569 GTK to supply. we don't want to specify out targets (=formats)
570 or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and
571 not GTK_DEST_DEFAULT_DROP). instead we react individually to
572 "drag_motion" and "drag_drop" events. this makes it possible
573 to allow dropping on only a small area. we should set
574 GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice
575 highlighting if dragging over standard controls, but this
576 seems to be broken without the other two. */
577
578 gtk_drag_dest_set( widget,
579 (GtkDestDefaults) 0, /* no default behaviour */
580 (GtkTargetEntry*) NULL, /* we don't supply any formats here */
581 0, /* number of targets = 0 */
582 (GdkDragAction) 0 ); /* we don't supply any actions here */
583
584 g_signal_connect (widget, "drag_leave",
585 G_CALLBACK (target_drag_leave), this);
586
587 g_signal_connect (widget, "drag_motion",
588 G_CALLBACK (target_drag_motion), this);
589
590 g_signal_connect (widget, "drag_drop",
591 G_CALLBACK (target_drag_drop), this);
592
593 g_signal_connect (widget, "drag_data_received",
594 G_CALLBACK (target_drag_data_received), this);
595 }
596
597 //----------------------------------------------------------------------------
598 // "drag_data_get"
599 //----------------------------------------------------------------------------
600
601 extern "C" {
602 static void
603 source_drag_data_get (GtkWidget *WXUNUSED(widget),
604 GdkDragContext *WXUNUSED(context),
605 GtkSelectionData *selection_data,
606 guint WXUNUSED(info),
607 guint WXUNUSED(time),
608 wxDropSource *drop_source )
609 {
610 if (g_isIdle) wxapp_install_idle_handler();
611
612 wxDataFormat format( selection_data->target );
613
614 #ifdef __WXDEBUG__
615 wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
616 format.GetId().c_str());
617 #endif
618
619 drop_source->m_retValue = wxDragCancel;
620
621 wxDataObject *data = drop_source->GetDataObject();
622
623 if (!data)
624 {
625 #ifdef __WXDEBUG__
626 wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
627 #endif
628 return;
629 }
630
631 if (!data->IsSupportedFormat(format))
632 {
633 #ifdef __WXDEBUG__
634 wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
635 #endif
636 return;
637 }
638
639 if (data->GetDataSize(format) == 0)
640 {
641 #ifdef __WXDEBUG__
642 wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );
643 #endif
644 return;
645 }
646
647 size_t size = data->GetDataSize(format);
648
649 // printf( "data size: %d.\n", (int)data_size );
650
651 guchar *d = new guchar[size];
652
653 if (!data->GetDataHere( format, (void*)d ))
654 {
655 delete[] d;
656 return;
657 }
658
659 #if wxUSE_THREADS
660 /* disable GUI threads */
661 #endif
662
663 gtk_selection_data_set( selection_data,
664 selection_data->target,
665 8, // 8-bit
666 d,
667 size );
668
669 #if wxUSE_THREADS
670 /* enable GUI threads */
671 #endif
672
673 delete[] d;
674 }
675 }
676
677 //----------------------------------------------------------------------------
678 // "drag_data_delete"
679 //----------------------------------------------------------------------------
680
681 extern "C" {
682 static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
683 GdkDragContext *WXUNUSED(context),
684 wxDropSource *WXUNUSED(drop_source) )
685 {
686 if (g_isIdle)
687 wxapp_install_idle_handler();
688
689 // printf( "Drag source: drag_data_delete\n" );
690 }
691 }
692
693 //----------------------------------------------------------------------------
694 // "drag_begin"
695 //----------------------------------------------------------------------------
696
697 extern "C" {
698 static void source_drag_begin( GtkWidget *WXUNUSED(widget),
699 GdkDragContext *WXUNUSED(context),
700 wxDropSource *WXUNUSED(drop_source) )
701 {
702 if (g_isIdle)
703 wxapp_install_idle_handler();
704
705 // printf( "Drag source: drag_begin.\n" );
706 }
707 }
708
709 //----------------------------------------------------------------------------
710 // "drag_end"
711 //----------------------------------------------------------------------------
712
713 extern "C" {
714 static void source_drag_end( GtkWidget *WXUNUSED(widget),
715 GdkDragContext *WXUNUSED(context),
716 wxDropSource *drop_source )
717 {
718 if (g_isIdle) wxapp_install_idle_handler();
719
720 // printf( "Drag source: drag_end.\n" );
721
722 drop_source->m_waiting = false;
723 }
724 }
725
726 //-----------------------------------------------------------------------------
727 // "configure_event" from m_iconWindow
728 //-----------------------------------------------------------------------------
729
730 extern "C" {
731 static gint
732 gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
733 {
734 // don't need to install idle handler, its done from "event" signal
735
736 source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) );
737
738 return 0;
739 }
740 }
741
742 //---------------------------------------------------------------------------
743 // wxDropSource
744 //---------------------------------------------------------------------------
745
746 wxDropSource::wxDropSource(wxWindow *win,
747 const wxIcon &iconCopy,
748 const wxIcon &iconMove,
749 const wxIcon &iconNone)
750 {
751 m_waiting = true;
752
753 m_iconWindow = (GtkWidget*) NULL;
754
755 m_window = win;
756 m_widget = win->m_widget;
757 if (win->m_wxwindow) m_widget = win->m_wxwindow;
758
759 m_retValue = wxDragCancel;
760
761 SetIcons(iconCopy, iconMove, iconNone);
762 }
763
764 wxDropSource::wxDropSource(wxDataObject& data,
765 wxWindow *win,
766 const wxIcon &iconCopy,
767 const wxIcon &iconMove,
768 const wxIcon &iconNone)
769 {
770 m_waiting = true;
771
772 SetData( data );
773
774 m_iconWindow = (GtkWidget*) NULL;
775
776 m_window = win;
777 m_widget = win->m_widget;
778 if (win->m_wxwindow) m_widget = win->m_wxwindow;
779
780 m_retValue = wxDragCancel;
781
782 SetIcons(iconCopy, iconMove, iconNone);
783 }
784
785 void wxDropSource::SetIcons(const wxIcon &iconCopy,
786 const wxIcon &iconMove,
787 const wxIcon &iconNone)
788 {
789 m_iconCopy = iconCopy;
790 m_iconMove = iconMove;
791 m_iconNone = iconNone;
792
793 if ( !m_iconCopy.Ok() )
794 m_iconCopy = wxIcon(page_xpm);
795 if ( !m_iconMove.Ok() )
796 m_iconMove = m_iconCopy;
797 if ( !m_iconNone.Ok() )
798 m_iconNone = m_iconCopy;
799 }
800
801 wxDropSource::~wxDropSource()
802 {
803 }
804
805 void wxDropSource::PrepareIcon( int action, GdkDragContext *context )
806 {
807 // get the right icon to display
808 wxIcon *icon = NULL;
809 if ( action & GDK_ACTION_MOVE )
810 icon = &m_iconMove;
811 else if ( action & GDK_ACTION_COPY )
812 icon = &m_iconCopy;
813 else
814 icon = &m_iconNone;
815
816 GdkBitmap *mask;
817 if ( icon->GetMask() )
818 mask = icon->GetMask()->GetBitmap();
819 else
820 mask = (GdkBitmap *)NULL;
821
822 GdkPixmap *pixmap = icon->GetPixmap();
823
824 gint width,height;
825 gdk_drawable_get_size (pixmap, &width, &height);
826
827 GdkColormap *colormap = gtk_widget_get_colormap( m_widget );
828 gtk_widget_push_colormap (colormap);
829
830 m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP);
831 gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
832 gtk_widget_set_app_paintable (GTK_WIDGET (m_iconWindow), TRUE);
833
834 gtk_widget_pop_colormap ();
835
836 gtk_widget_set_size_request (m_iconWindow, width, height);
837 gtk_widget_realize (m_iconWindow);
838
839 g_signal_connect (m_iconWindow, "configure_event",
840 G_CALLBACK (gtk_dnd_window_configure_callback), this);
841
842 gdk_window_set_back_pixmap (m_iconWindow->window, pixmap, FALSE);
843
844 if (mask)
845 gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0);
846
847 gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 );
848 }
849
850 wxDragResult wxDropSource::DoDragDrop(int flags)
851 {
852 wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone,
853 wxT("Drop source: no data") );
854
855 // still in drag
856 if (g_blockEventsOnDrag)
857 return wxDragNone;
858
859 // don't start dragging if no button is down
860 if (g_lastButtonNumber == 0)
861 return wxDragNone;
862
863 // we can only start a drag after a mouse event
864 if (g_lastMouseEvent == NULL)
865 return wxDragNone;
866
867 // disabled for now
868 g_blockEventsOnDrag = true;
869
870 RegisterWindow();
871
872 m_waiting = true;
873
874 GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 );
875
876 wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
877 m_data->GetAllFormats( array );
878 size_t count = m_data->GetFormatCount();
879 for (size_t i = 0; i < count; i++)
880 {
881 GdkAtom atom = array[i];
882 #ifdef __WXDEBUG__
883 wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom ));
884 #endif
885 gtk_target_list_add( target_list, atom, 0, 0 );
886 }
887 delete[] array;
888
889 int action = GDK_ACTION_COPY;
890 if ( flags & wxDrag_AllowMove )
891 action |= GDK_ACTION_MOVE;
892
893 // VZ: as we already use g_blockEventsOnDrag it shouldn't be that bad
894 // to use a global to pass the flags to the drop target but I'd
895 // surely prefer a better way to do it
896 gs_flagsForDrag = flags;
897
898 GdkDragContext *context = gtk_drag_begin( m_widget,
899 target_list,
900 (GdkDragAction)action,
901 g_lastButtonNumber, // number of mouse button which started drag
902 (GdkEvent*) g_lastMouseEvent );
903
904 m_dragContext = context;
905
906 PrepareIcon( action, context );
907
908 while (m_waiting)
909 gtk_main_iteration();
910
911 m_retValue = ConvertFromGTK(context->action);
912 if ( m_retValue == wxDragNone )
913 m_retValue = wxDragCancel;
914
915 g_blockEventsOnDrag = false;
916
917 UnregisterWindow();
918
919 return m_retValue;
920 }
921
922 void wxDropSource::RegisterWindow()
923 {
924 if (!m_widget) return;
925
926 g_signal_connect (m_widget, "drag_data_get",
927 G_CALLBACK (source_drag_data_get), this);
928 g_signal_connect (m_widget, "drag_data_delete",
929 G_CALLBACK (source_drag_data_delete), this);
930 g_signal_connect (m_widget, "drag_begin",
931 G_CALLBACK (source_drag_begin), this);
932 g_signal_connect (m_widget, "drag_end",
933 G_CALLBACK (source_drag_end), this);
934
935 }
936
937 void wxDropSource::UnregisterWindow()
938 {
939 if (!m_widget)
940 return;
941
942 g_signal_handlers_disconnect_by_func (m_widget,
943 (gpointer) source_drag_data_get,
944 this);
945 g_signal_handlers_disconnect_by_func (m_widget,
946 (gpointer) source_drag_data_delete,
947 this);
948 g_signal_handlers_disconnect_by_func (m_widget,
949 (gpointer) source_drag_begin,
950 this);
951 g_signal_handlers_disconnect_by_func (m_widget,
952 (gpointer) source_drag_end,
953 this);
954 }
955
956 #endif
957 // wxUSE_DRAG_AND_DROP