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oops, fixed typo breaking iconv constness detection in the previous commit
[wxWidgets.git] / src / gtk / dnd.cpp
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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 <gtk/gtkdnd.h>
29#include <gtk/gtkselection.h>
30
31//-----------------------------------------------------------------------------
32// idle system
33//-----------------------------------------------------------------------------
34
35extern void wxapp_install_idle_handler();
36extern bool g_isIdle;
37
38//-----------------------------------------------------------------------------
39// thread system
40//-----------------------------------------------------------------------------
41
42#if wxUSE_THREADS
43extern void wxapp_install_thread_wakeup();
44extern void wxapp_uninstall_thread_wakeup();
45#endif
46
47//----------------------------------------------------------------------------
48// global data
49//----------------------------------------------------------------------------
50
51extern bool g_blockEventsOnDrag;
52
53// the trace mask we use with wxLogTrace() - call
54// wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here
55// (there are quite a few of them, so don't enable this by default)
56static const wxChar *TRACE_DND = _T("dnd");
57
58//----------------------------------------------------------------------------
59// standard icons
60//----------------------------------------------------------------------------
61
62/* XPM */
63static const char * page_xpm[] = {
64/* width height ncolors chars_per_pixel */
65"32 32 5 1",
66/* colors */
67" s None c None",
68". c black",
69"X c wheat",
70"o c tan",
71"O c #6699FF",
72/* pixels */
73" ................... ",
74" .XXXXXXXXXXXXXXXXX.. ",
75" .XXXXXXXXXXXXXXXXX.o. ",
76" .XXXXXXXXXXXXXXXXX.oo. ",
77" .XXXXXXXXXXXXXXXXX.ooo. ",
78" .XXXXXXXXXXXXXXXXX.oooo. ",
79" .XXXXXXXXXXXXXXXXX....... ",
80" .XXXXXOOOOOOOOOOXXXooooo. ",
81" .XXXXXXXXXXXXXXXXXXooooo. ",
82" .XXXXXOOOOOOOOOOXXXXXXXX. ",
83" .XXXXXXXXXXXXXXXXXXXXXXX. ",
84" .XXXXXXXOOOOOOOOOXXXXXXX. ",
85" .XXXXXXXXXXXXXXXXXXXXXXX. ",
86" .XXXXXXOOOOOOOOOOXXXXXXX. ",
87" .XXXXXXXXXXXXXXXXXXXXXXX. ",
88" .XXXXXOOOOOOOOOOXXXXXXXX. ",
89" .XXXXXXXXXXXXXXXXXXXXXXX. ",
90" .XXXXXXXOOOOOOOOOXXXXXXX. ",
91" .XXXXXXXXXXXXXXXXXXXXXXX. ",
92" .XXXXXXOOOOOOOOOOXXXXXXX. ",
93" .XXXXXXXXXXXXXXXXXXXXXXX. ",
94" .XXXXXOOOOOOOOOOXXXXXXXX. ",
95" .XXXXXXXXXXXXXXXXXXXXXXX. ",
96" .XXXXXXOOOOOOOOOOXXXXXXX. ",
97" .XXXXXXXXXXXXXXXXXXXXXXX. ",
98" .XXXXXOOOOOOOXXXXXXXXXXX. ",
99" .XXXXXXXXXXXXXXXXXXXXXXX. ",
100" .XXXXXXXXXXXXXXXXXXXXXXX. ",
101" .XXXXXXXXXXXXXXXXXXXXXXX. ",
102" .XXXXXXXXXXXXXXXXXXXXXXX. ",
103" .XXXXXXXXXXXXXXXXXXXXXXX. ",
104" ......................... "};
105
106
107
108// ----------------------------------------------------------------------------
109// "drag_leave"
110// ----------------------------------------------------------------------------
111
112static void target_drag_leave( GtkWidget *WXUNUSED(widget),
113 GdkDragContext *context,
114 guint WXUNUSED(time),
115 wxDropTarget *drop_target )
116{
117 if (g_isIdle) wxapp_install_idle_handler();
118
119 /* inform the wxDropTarget about the current GdkDragContext.
120 this is only valid for the duration of this call */
121 drop_target->SetDragContext( context );
122
123 /* we don't need return values. this event is just for
124 information */
125 drop_target->OnLeave();
126
127 /* this has to be done because GDK has no "drag_enter" event */
128 drop_target->m_firstMotion = TRUE;
129
130 /* after this, invalidate the drop_target's GdkDragContext */
131 drop_target->SetDragContext( (GdkDragContext*) NULL );
132}
133
134// ----------------------------------------------------------------------------
135// "drag_motion"
136// ----------------------------------------------------------------------------
137
138static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget),
139 GdkDragContext *context,
140 gint x,
141 gint y,
142 guint time,
143 wxDropTarget *drop_target )
144{
145 if (g_isIdle) wxapp_install_idle_handler();
146
147 /* Owen Taylor: "if the coordinates not in a drop zone,
148 return FALSE, otherwise call gtk_drag_status() and
149 return TRUE" */
150
151 /* inform the wxDropTarget about the current GdkDragContext.
152 this is only valid for the duration of this call */
153 drop_target->SetDragContext( context );
154
155 wxDragResult result;
156 if ( context->suggested_action == GDK_ACTION_COPY )
157 result = wxDragCopy;
158 else if ( context->suggested_action == GDK_ACTION_LINK )
159 result = wxDragLink;
160 else
161 result = wxDragMove;
162
163 if (drop_target->m_firstMotion)
164 {
165 /* the first "drag_motion" event substitutes a "drag_enter" event */
166 result = drop_target->OnEnter( x, y, result );
167 }
168 else
169 {
170 /* give program a chance to react (i.e. to say no by returning FALSE) */
171 result = drop_target->OnDragOver( x, y, result );
172 }
173
174 bool ret = wxIsDragResultOk( result );
175 if (ret)
176 {
177 GdkDragAction action;
178 if (result == wxDragCopy)
179 action = GDK_ACTION_COPY;
180 else if (result == wxDragLink)
181 action = GDK_ACTION_LINK;
182 else
183 action = GDK_ACTION_MOVE;
184
185 gdk_drag_status( context, action, time );
186 }
187
188 /* after this, invalidate the drop_target's GdkDragContext */
189 drop_target->SetDragContext( (GdkDragContext*) NULL );
190
191 /* this has to be done because GDK has no "drag_enter" event */
192 drop_target->m_firstMotion = FALSE;
193
194 return ret;
195}
196
197// ----------------------------------------------------------------------------
198// "drag_drop"
199// ----------------------------------------------------------------------------
200
201static gboolean target_drag_drop( GtkWidget *widget,
202 GdkDragContext *context,
203 gint x,
204 gint y,
205 guint time,
206 wxDropTarget *drop_target )
207{
208 if (g_isIdle) wxapp_install_idle_handler();
209
210 /* Owen Taylor: "if the drop is not in a drop zone,
211 return FALSE, otherwise, if you aren't accepting
212 the drop, call gtk_drag_finish() with success == FALSE
213 otherwise call gtk_drag_data_get()" */
214
215// printf( "drop.\n" );
216
217 /* this seems to make a difference between not accepting
218 due to wrong target area and due to wrong format. let
219 us hope that this is not required.. */
220
221 /* inform the wxDropTarget about the current GdkDragContext.
222 this is only valid for the duration of this call */
223 drop_target->SetDragContext( context );
224
225 /* inform the wxDropTarget about the current drag widget.
226 this is only valid for the duration of this call */
227 drop_target->SetDragWidget( widget );
228
229 /* inform the wxDropTarget about the current drag time.
230 this is only valid for the duration of this call */
231 drop_target->SetDragTime( time );
232
233/*
234 wxDragResult result = wxDragMove;
235 if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy;
236*/
237
238 /* reset the block here as someone might very well
239 show a dialog as a reaction to a drop and this
240 wouldn't work without events */
241 g_blockEventsOnDrag = FALSE;
242
243 bool ret = drop_target->OnDrop( x, y );
244
245 if (!ret)
246 {
247 wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
248
249 /* cancel the whole thing */
250 gtk_drag_finish( context,
251 FALSE, /* no success */
252 FALSE, /* don't delete data on dropping side */
253 time );
254 }
255 else
256 {
257 wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") );
258
259#if wxUSE_THREADS
260 /* disable GUI threads */
261 wxapp_uninstall_thread_wakeup();
262#endif
263
264 GdkAtom format = drop_target->GetMatchingPair();
265 wxASSERT( format );
266
267/*
268 GdkDragAction action = GDK_ACTION_MOVE;
269 if (result == wxDragCopy) action == GDK_ACTION_COPY;
270 context->action = action;
271*/
272 /* this should trigger an "drag_data_received" event */
273 gtk_drag_get_data( widget,
274 context,
275 format,
276 time );
277
278#if wxUSE_THREADS
279 /* re-enable GUI threads */
280 wxapp_install_thread_wakeup();
281#endif
282 }
283
284 /* after this, invalidate the drop_target's GdkDragContext */
285 drop_target->SetDragContext( (GdkDragContext*) NULL );
286
287 /* after this, invalidate the drop_target's drag widget */
288 drop_target->SetDragWidget( (GtkWidget*) NULL );
289
290 /* this has to be done because GDK has no "drag_enter" event */
291 drop_target->m_firstMotion = TRUE;
292
293 return ret;
294}
295
296// ----------------------------------------------------------------------------
297// "drag_data_received"
298// ----------------------------------------------------------------------------
299
300static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
301 GdkDragContext *context,
302 gint x,
303 gint y,
304 GtkSelectionData *data,
305 guint WXUNUSED(info),
306 guint time,
307 wxDropTarget *drop_target )
308{
309 if (g_isIdle) wxapp_install_idle_handler();
310
311 /* Owen Taylor: "call gtk_drag_finish() with
312 success == TRUE" */
313
314 if ((data->length <= 0) || (data->format != 8))
315 {
316 /* negative data length and non 8-bit data format
317 qualifies for junk */
318 gtk_drag_finish (context, FALSE, FALSE, time);
319
320 return;
321 }
322
323 wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") );
324
325 /* inform the wxDropTarget about the current GtkSelectionData.
326 this is only valid for the duration of this call */
327 drop_target->SetDragData( data );
328
329 wxDragResult result;
330 if ( context->suggested_action == GDK_ACTION_COPY )
331 result = wxDragCopy;
332 else if ( context->suggested_action == GDK_ACTION_LINK )
333 result = wxDragLink;
334 else
335 result = wxDragMove;
336
337 if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
338 {
339 wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") );
340
341 /* tell GTK that data transfer was successfull */
342 gtk_drag_finish( context, TRUE, FALSE, time );
343 }
344 else
345 {
346 wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") );
347
348 /* tell GTK that data transfer was not successfull */
349 gtk_drag_finish( context, FALSE, FALSE, time );
350 }
351
352 /* after this, invalidate the drop_target's drag data */
353 drop_target->SetDragData( (GtkSelectionData*) NULL );
354}
355
356//----------------------------------------------------------------------------
357// wxDropTarget
358//----------------------------------------------------------------------------
359
360wxDropTarget::wxDropTarget( wxDataObject *data )
361 : wxDropTargetBase( data )
362{
363 m_firstMotion = TRUE;
364 m_dragContext = (GdkDragContext*) NULL;
365 m_dragWidget = (GtkWidget*) NULL;
366 m_dragData = (GtkSelectionData*) NULL;
367 m_dragTime = 0;
368}
369
370wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x),
371 wxCoord WXUNUSED(y),
372 wxDragResult def )
373{
374 // GetMatchingPair() checks for m_dataObject too, no need to do it here
375
376 // disable the debug message from GetMatchingPair() - there are too many
377 // of them otherwise
378#ifdef __WXDEBUG__
379 wxLogNull noLog;
380#endif // Debug
381
382 return (GetMatchingPair() != (GdkAtom) 0) ? def : wxDragNone;
383}
384
385bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) )
386{
387 if (!m_dataObject)
388 return FALSE;
389
390 return (GetMatchingPair() != (GdkAtom) 0);
391}
392
393wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
394 wxDragResult def )
395{
396 if (!m_dataObject)
397 return wxDragNone;
398
399 if (GetMatchingPair() == (GdkAtom) 0)
400 return wxDragNone;
401
402 return GetData() ? def : wxDragNone;
403}
404
405GdkAtom wxDropTarget::GetMatchingPair()
406{
407 if (!m_dataObject)
408 return (GdkAtom) 0;
409
410 if (!m_dragContext)
411 return (GdkAtom) 0;
412
413 GList *child = m_dragContext->targets;
414 while (child)
415 {
416 GdkAtom formatAtom = (GdkAtom) GPOINTER_TO_INT(child->data);
417 wxDataFormat format( formatAtom );
418
419#ifdef __WXDEBUG__
420 wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"),
421 format.GetId().c_str());
422#endif // Debug
423
424 if (m_dataObject->IsSupportedFormat( format ))
425 return formatAtom;
426
427 child = child->next;
428 }
429
430 return (GdkAtom) 0;
431}
432
433bool wxDropTarget::GetData()
434{
435 if (!m_dragData)
436 return FALSE;
437
438 if (!m_dataObject)
439 return FALSE;
440
441 wxDataFormat dragFormat( m_dragData->target );
442
443 if (!m_dataObject->IsSupportedFormat( dragFormat ))
444 return FALSE;
445
446 m_dataObject->SetData( dragFormat, (size_t)m_dragData->length, (const void*)m_dragData->data );
447
448 return TRUE;
449}
450
451void wxDropTarget::UnregisterWidget( GtkWidget *widget )
452{
453 wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") );
454
455 gtk_drag_dest_unset( widget );
456
457 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
458 GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
459
460 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
461 GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
462
463 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
464 GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
465
466 gtk_signal_disconnect_by_func( GTK_OBJECT(widget),
467 GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
468}
469
470void wxDropTarget::RegisterWidget( GtkWidget *widget )
471{
472 wxCHECK_RET( widget != NULL, wxT("register widget is NULL") );
473
474 /* gtk_drag_dest_set() determines what default behaviour we'd like
475 GTK to supply. we don't want to specify out targets (=formats)
476 or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and
477 not GTK_DEST_DEFAULT_DROP). instead we react individually to
478 "drag_motion" and "drag_drop" events. this makes it possible
479 to allow dropping on only a small area. we should set
480 GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice
481 highlighting if dragging over standard controls, but this
482 seems to be broken without the other two. */
483
484 gtk_drag_dest_set( widget,
485 (GtkDestDefaults) 0, /* no default behaviour */
486 (GtkTargetEntry*) NULL, /* we don't supply any formats here */
487 0, /* number of targets = 0 */
488 (GdkDragAction) 0 ); /* we don't supply any actions here */
489
490 gtk_signal_connect( GTK_OBJECT(widget), "drag_leave",
491 GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this );
492
493 gtk_signal_connect( GTK_OBJECT(widget), "drag_motion",
494 GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this );
495
496 gtk_signal_connect( GTK_OBJECT(widget), "drag_drop",
497 GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this );
498
499 gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received",
500 GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this );
501}
502
503//----------------------------------------------------------------------------
504// "drag_data_get"
505//----------------------------------------------------------------------------
506
507static void
508source_drag_data_get (GtkWidget *WXUNUSED(widget),
509 GdkDragContext *WXUNUSED(context),
510 GtkSelectionData *selection_data,
511 guint WXUNUSED(info),
512 guint WXUNUSED(time),
513 wxDropSource *drop_source )
514{
515 if (g_isIdle) wxapp_install_idle_handler();
516
517 wxDataFormat format( selection_data->target );
518
519 wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
520 format.GetId().c_str());
521
522 drop_source->m_retValue = wxDragCancel;
523
524 wxDataObject *data = drop_source->GetDataObject();
525
526 if (!data)
527 {
528 wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
529 return;
530 }
531
532 if (!data->IsSupportedFormat(format))
533 {
534 wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
535 return;
536 }
537
538 if (data->GetDataSize(format) == 0)
539 {
540 wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );
541 return;
542 }
543
544 size_t size = data->GetDataSize(format);
545
546// printf( "data size: %d.\n", (int)data_size );
547
548 guchar *d = new guchar[size];
549
550 if (!data->GetDataHere( format, (void*)d ))
551 {
552 delete[] d;
553 return;
554 }
555
556#if wxUSE_THREADS
557 /* disable GUI threads */
558 wxapp_uninstall_thread_wakeup();
559#endif
560
561 gtk_selection_data_set( selection_data,
562 selection_data->target,
563 8, // 8-bit
564 d,
565 size );
566
567#if wxUSE_THREADS
568 /* enable GUI threads */
569 wxapp_install_thread_wakeup();
570#endif
571
572 delete[] d;
573}
574
575//----------------------------------------------------------------------------
576// "drag_data_delete"
577//----------------------------------------------------------------------------
578
579static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
580 GdkDragContext *context,
581 wxDropSource *WXUNUSED(drop_source) )
582{
583 if (g_isIdle)
584 wxapp_install_idle_handler();
585
586 // printf( "Drag source: drag_data_delete\n" );
587}
588
589//----------------------------------------------------------------------------
590// "drag_begin"
591//----------------------------------------------------------------------------
592
593static void source_drag_begin( GtkWidget *WXUNUSED(widget),
594 GdkDragContext *WXUNUSED(context),
595 wxDropSource *WXUNUSED(drop_source) )
596{
597 if (g_isIdle)
598 wxapp_install_idle_handler();
599
600 // printf( "Drag source: drag_begin.\n" );
601}
602
603//----------------------------------------------------------------------------
604// "drag_end"
605//----------------------------------------------------------------------------
606
607static void source_drag_end( GtkWidget *WXUNUSED(widget),
608 GdkDragContext *WXUNUSED(context),
609 wxDropSource *drop_source )
610{
611 if (g_isIdle) wxapp_install_idle_handler();
612
613 // printf( "Drag source: drag_end.\n" );
614
615 drop_source->m_waiting = FALSE;
616}
617
618//-----------------------------------------------------------------------------
619// "configure_event" from m_iconWindow
620//-----------------------------------------------------------------------------
621
622static gint
623gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source )
624{
625 if (g_isIdle)
626 wxapp_install_idle_handler();
627
628 wxDragResult action = wxDragNone;
629 if (source->m_dragContext->action == GDK_ACTION_COPY) action = wxDragCopy;
630 if (source->m_dragContext->action == GDK_ACTION_LINK) action = wxDragLink;
631 if (source->m_dragContext->action == GDK_ACTION_MOVE) action = wxDragMove;
632
633 source->GiveFeedback( action );
634
635 return 0;
636}
637
638//---------------------------------------------------------------------------
639// wxDropSource
640//---------------------------------------------------------------------------
641
642wxDropSource::wxDropSource(wxWindow *win,
643 const wxIcon &iconCopy,
644 const wxIcon &iconMove,
645 const wxIcon &iconNone)
646{
647 m_waiting = TRUE;
648
649 m_iconWindow = (GtkWidget*) NULL;
650
651 m_window = win;
652 m_widget = win->m_widget;
653 if (win->m_wxwindow) m_widget = win->m_wxwindow;
654
655 m_retValue = wxDragCancel;
656
657 SetIcons(iconCopy, iconMove, iconNone);
658}
659
660wxDropSource::wxDropSource(wxDataObject& data,
661 wxWindow *win,
662 const wxIcon &iconCopy,
663 const wxIcon &iconMove,
664 const wxIcon &iconNone)
665{
666 m_waiting = TRUE;
667
668 SetData( data );
669
670 m_iconWindow = (GtkWidget*) NULL;
671
672 m_window = win;
673 m_widget = win->m_widget;
674 if (win->m_wxwindow) m_widget = win->m_wxwindow;
675
676 m_retValue = wxDragCancel;
677
678 SetIcons(iconCopy, iconMove, iconNone);
679}
680
681void wxDropSource::SetIcons(const wxIcon &iconCopy,
682 const wxIcon &iconMove,
683 const wxIcon &iconNone)
684{
685 m_iconCopy = iconCopy;
686 m_iconMove = iconMove;
687 m_iconNone = iconNone;
688
689 if ( !m_iconCopy.Ok() )
690 m_iconCopy = wxIcon(page_xpm);
691 if ( !m_iconMove.Ok() )
692 m_iconMove = m_iconCopy;
693 if ( !m_iconNone.Ok() )
694 m_iconNone = m_iconCopy;
695}
696
697wxDropSource::~wxDropSource()
698{
699}
700
701void wxDropSource::PrepareIcon( int action, GdkDragContext *context )
702{
703 // get the right icon to display
704 wxIcon *icon = NULL;
705 if ( action & GDK_ACTION_MOVE )
706 icon = &m_iconMove;
707 else if ( action & GDK_ACTION_COPY )
708 icon = &m_iconCopy;
709 else
710 icon = &m_iconNone;
711
712 GdkBitmap *mask;
713 if ( icon->GetMask() )
714 mask = icon->GetMask()->GetBitmap();
715 else
716 mask = (GdkBitmap *)NULL;
717
718 GdkPixmap *pixmap = icon->GetPixmap();
719
720 gint width,height;
721 gdk_window_get_size (pixmap, &width, &height);
722
723 GdkColormap *colormap = gtk_widget_get_colormap( m_widget );
724#ifndef __WXGTK20__
725 gtk_widget_push_visual (gdk_colormap_get_visual (colormap));
726#endif
727 gtk_widget_push_colormap (colormap);
728
729 m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP);
730 gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
731 gtk_widget_set_app_paintable (GTK_WIDGET (m_iconWindow), TRUE);
732
733#ifndef __WXGTK20__
734 gtk_widget_pop_visual ();
735#endif
736 gtk_widget_pop_colormap ();
737
738 gtk_widget_set_usize (m_iconWindow, width, height);
739 gtk_widget_realize (m_iconWindow);
740
741 gtk_signal_connect( GTK_OBJECT(m_iconWindow), "configure_event",
742 GTK_SIGNAL_FUNC(gtk_dnd_window_configure_callback), (gpointer)this );
743
744 gdk_window_set_back_pixmap (m_iconWindow->window, pixmap, FALSE);
745
746 if (mask)
747 gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0);
748
749 gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 );
750}
751
752wxDragResult wxDropSource::DoDragDrop( bool allowMove )
753{
754 wxASSERT_MSG( m_data, wxT("Drop source: no data") );
755
756 if (!m_data)
757 return (wxDragResult) wxDragNone;
758
759 if (m_data->GetFormatCount() == 0)
760 return (wxDragResult) wxDragNone;
761
762 // still in drag
763 if (g_blockEventsOnDrag)
764 return (wxDragResult) wxDragNone;
765
766 // disabled for now
767 g_blockEventsOnDrag = TRUE;
768
769 RegisterWindow();
770
771 m_waiting = TRUE;
772
773 GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 );
774
775 wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ];
776 m_data->GetAllFormats( array );
777 for (size_t i = 0; i < m_data->GetFormatCount(); i++)
778 {
779 GdkAtom atom = array[i];
780 wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom ));
781 gtk_target_list_add( target_list, atom, 0, 0 );
782 }
783 delete[] array;
784
785 GdkEventMotion event;
786 event.window = m_widget->window;
787 int x = 0;
788 int y = 0;
789 GdkModifierType state;
790 gdk_window_get_pointer( event.window, &x, &y, &state );
791 event.x = x;
792 event.y = y;
793 event.state = state;
794 event.time = (guint32)GDK_CURRENT_TIME;
795
796 /* GTK wants to know which button was pressed which caused the dragging */
797 int button_number = 0;
798 if (event.state & GDK_BUTTON1_MASK) button_number = 1;
799 else if (event.state & GDK_BUTTON2_MASK) button_number = 2;
800 else if (event.state & GDK_BUTTON3_MASK) button_number = 3;
801
802#if wxUSE_THREADS
803 /* disable GUI threads */
804 wxapp_uninstall_thread_wakeup();
805#endif
806
807 /* don't start dragging if no button is down */
808 if (button_number)
809 {
810 int action = GDK_ACTION_COPY;
811 if ( allowMove )
812 action |= GDK_ACTION_MOVE;
813 GdkDragContext *context = gtk_drag_begin( m_widget,
814 target_list,
815 (GdkDragAction)action,
816 button_number, /* number of mouse button which started drag */
817 (GdkEvent*) &event );
818
819 m_dragContext = context;
820
821 PrepareIcon( action, context );
822
823 while (m_waiting) gtk_main_iteration();
824
825 if (context->action == GDK_ACTION_COPY)
826 m_retValue = wxDragCopy;
827 if (context->action == GDK_ACTION_LINK)
828 m_retValue = wxDragLink;
829 if (context->action == GDK_ACTION_MOVE)
830 m_retValue = wxDragMove;
831 }
832
833#if wxUSE_THREADS
834 /* re-enable GUI threads */
835 wxapp_install_thread_wakeup();
836#endif
837
838 g_blockEventsOnDrag = FALSE;
839
840 UnregisterWindow();
841
842 return m_retValue;
843}
844
845void wxDropSource::RegisterWindow()
846{
847 if (!m_widget) return;
848
849 gtk_signal_connect( GTK_OBJECT(m_widget), "drag_data_get",
850 GTK_SIGNAL_FUNC (source_drag_data_get), (gpointer) this);
851 gtk_signal_connect (GTK_OBJECT(m_widget), "drag_data_delete",
852 GTK_SIGNAL_FUNC (source_drag_data_delete), (gpointer) this );
853 gtk_signal_connect (GTK_OBJECT(m_widget), "drag_begin",
854 GTK_SIGNAL_FUNC (source_drag_begin), (gpointer) this );
855 gtk_signal_connect (GTK_OBJECT(m_widget), "drag_end",
856 GTK_SIGNAL_FUNC (source_drag_end), (gpointer) this );
857
858}
859
860void wxDropSource::UnregisterWindow()
861{
862 if (!m_widget) return;
863
864 gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
865 GTK_SIGNAL_FUNC(source_drag_data_get), (gpointer) this );
866 gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
867 GTK_SIGNAL_FUNC(source_drag_data_delete), (gpointer) this );
868 gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
869 GTK_SIGNAL_FUNC(source_drag_begin), (gpointer) this );
870 gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget),
871 GTK_SIGNAL_FUNC(source_drag_end), (gpointer) this );
872}
873
874#endif
875 // wxUSE_DRAG_AND_DROP
wxWidgets (Impactor)