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[wxWidgets.git] / src / gtk / toplevel.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/gtk/toplevel.cpp
3 // Purpose:
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 // ============================================================================
14 // declarations
15 // ============================================================================
16
17 // ----------------------------------------------------------------------------
18 // headers
19 // ----------------------------------------------------------------------------
20
21 #ifdef __VMS
22 #define XIconifyWindow XICONIFYWINDOW
23 #endif
24
25 #include "wx/toplevel.h"
26
27 #ifndef WX_PRECOMP
28 #include "wx/frame.h"
29 #include "wx/icon.h"
30 #include "wx/log.h"
31 #include "wx/app.h"
32 #endif
33
34 #include "wx/gtk/private.h"
35 #include "wx/evtloop.h"
36 #include "wx/sysopt.h"
37
38 #include <gtk/gtk.h>
39 #include <gdk/gdkx.h>
40
41 #include "wx/gtk/private/win_gtk.h"
42
43 #include "wx/unix/utilsx11.h"
44
45 // XA_CARDINAL
46 #include <X11/Xatom.h>
47
48 #if wxUSE_LIBHILDON
49 #include <hildon-widgets/hildon-program.h>
50 #include <hildon-widgets/hildon-window.h>
51 #endif // wxUSE_LIBHILDON
52
53 // ----------------------------------------------------------------------------
54 // data
55 // ----------------------------------------------------------------------------
56
57 // this is incremented while a modal dialog is shown
58 int wxOpenModalDialogsCount = 0;
59
60 // the frame that is currently active (i.e. its child has focus). It is
61 // used to generate wxActivateEvents
62 static wxTopLevelWindowGTK *g_activeFrame = (wxTopLevelWindowGTK*) NULL;
63 static wxTopLevelWindowGTK *g_lastActiveFrame = (wxTopLevelWindowGTK*) NULL;
64
65 // if we detect that the app has got/lost the focus, we set this variable to
66 // either TRUE or FALSE and an activate event will be sent during the next
67 // OnIdle() call and it is reset to -1: this value means that we shouldn't
68 // send any activate events at all
69 static int g_sendActivateEvent = -1;
70
71 //-----------------------------------------------------------------------------
72 // RequestUserAttention related functions
73 //-----------------------------------------------------------------------------
74
75 extern "C" {
76 static void wxgtk_window_set_urgency_hint (GtkWindow *win,
77 gboolean setting)
78 {
79 wxASSERT_MSG( GTK_WIDGET_REALIZED(win), wxT("wxgtk_window_set_urgency_hint: GdkWindow not realized") );
80 GdkWindow *window = GTK_WIDGET(win)->window;
81 XWMHints *wm_hints;
82
83 wm_hints = XGetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window));
84
85 if (!wm_hints)
86 wm_hints = XAllocWMHints();
87
88 if (setting)
89 wm_hints->flags |= XUrgencyHint;
90 else
91 wm_hints->flags &= ~XUrgencyHint;
92
93 XSetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window), wm_hints);
94 XFree(wm_hints);
95 }
96
97 static gboolean gtk_frame_urgency_timer_callback( wxTopLevelWindowGTK *win )
98 {
99 #if GTK_CHECK_VERSION(2,7,0)
100 if(!gtk_check_version(2,7,0))
101 gtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
102 else
103 #endif
104 wxgtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
105
106 win->m_urgency_hint = -2;
107 return FALSE;
108 }
109 }
110
111 //-----------------------------------------------------------------------------
112 // "focus_in_event"
113 //-----------------------------------------------------------------------------
114
115 extern "C" {
116 static gboolean gtk_frame_focus_in_callback( GtkWidget *widget,
117 GdkEvent *WXUNUSED(event),
118 wxTopLevelWindowGTK *win )
119 {
120 switch ( g_sendActivateEvent )
121 {
122 case -1:
123 // we've got focus from outside, synthetize wxActivateEvent
124 g_sendActivateEvent = 1;
125 break;
126
127 case 0:
128 // another our window just lost focus, it was already ours before
129 // - don't send any wxActivateEvent
130 g_sendActivateEvent = -1;
131 break;
132 }
133
134 g_activeFrame = win;
135 g_lastActiveFrame = g_activeFrame;
136
137 // wxPrintf( wxT("active: %s\n"), win->GetTitle().c_str() );
138
139 // MR: wxRequestUserAttention related block
140 switch( win->m_urgency_hint )
141 {
142 default:
143 g_source_remove( win->m_urgency_hint );
144 // no break, fallthrough to remove hint too
145 case -1:
146 #if GTK_CHECK_VERSION(2,7,0)
147 if(!gtk_check_version(2,7,0))
148 gtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
149 else
150 #endif
151 {
152 wxgtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
153 }
154
155 win->m_urgency_hint = -2;
156 break;
157
158 case -2: break;
159 }
160
161 wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
162 wxActivateEvent event(wxEVT_ACTIVATE, true, g_activeFrame->GetId());
163 event.SetEventObject(g_activeFrame);
164 g_activeFrame->HandleWindowEvent(event);
165
166 return FALSE;
167 }
168 }
169
170 //-----------------------------------------------------------------------------
171 // "focus_out_event"
172 //-----------------------------------------------------------------------------
173
174 extern "C" {
175 static
176 gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
177 GdkEventFocus *WXUNUSED(gdk_event),
178 wxTopLevelWindowGTK * WXUNUSED(win))
179 {
180 // if the focus goes out of our app alltogether, OnIdle() will send
181 // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
182 // g_sendActivateEvent to -1
183 g_sendActivateEvent = 0;
184
185 // wxASSERT_MSG( (g_activeFrame == win), wxT("TLW deactivatd although it wasn't active") );
186
187 // wxPrintf( wxT("inactive: %s\n"), win->GetTitle().c_str() );
188
189 if (g_activeFrame)
190 {
191 wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
192 wxActivateEvent event(wxEVT_ACTIVATE, false, g_activeFrame->GetId());
193 event.SetEventObject(g_activeFrame);
194 g_activeFrame->HandleWindowEvent(event);
195
196 g_activeFrame = NULL;
197 }
198
199 return FALSE;
200 }
201 }
202
203 //-----------------------------------------------------------------------------
204 // "size_allocate" from m_wxwindow
205 //-----------------------------------------------------------------------------
206
207 extern "C" {
208 static void
209 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
210 {
211 if (win->m_oldClientWidth != alloc->width ||
212 win->m_oldClientHeight != alloc->height)
213 {
214 win->m_oldClientWidth = alloc->width;
215 win->m_oldClientHeight = alloc->height;
216
217 wxSize size(win->m_widget->allocation.width,
218 win->m_widget->allocation.height);
219 size += win->m_decorSize;
220 win->m_width = size.x;
221 win->m_height = size.y;
222
223 if (!win->IsIconized())
224 {
225 wxSizeEvent event(size, win->GetId());
226 event.SetEventObject(win);
227 win->HandleWindowEvent(event);
228 }
229 // else the window is currently unmapped, don't generate size events
230 }
231 }
232 }
233
234 // ----------------------------------------------------------------------------
235 // "size_request"
236 // ----------------------------------------------------------------------------
237
238 extern "C" {
239 static
240 void wxgtk_tlw_size_request_callback(GtkWidget * WXUNUSED(widget),
241 GtkRequisition *requisition,
242 wxTopLevelWindowGTK *win)
243 {
244 // we must return the size of the window without WM decorations, otherwise
245 // GTK+ gets confused, so don't call just GetSize() here
246 win->GTKDoGetSize(&requisition->width, &requisition->height);
247 }
248 }
249
250 //-----------------------------------------------------------------------------
251 // "delete_event"
252 //-----------------------------------------------------------------------------
253
254 extern "C" {
255 static gboolean
256 gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
257 GdkEvent *WXUNUSED(event),
258 wxTopLevelWindowGTK *win )
259 {
260 if (win->IsEnabled() &&
261 (wxOpenModalDialogsCount == 0 || (win->GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) ||
262 win->IsGrabbed()))
263 win->Close();
264
265 return TRUE;
266 }
267 }
268
269 //-----------------------------------------------------------------------------
270 // "configure_event"
271 //-----------------------------------------------------------------------------
272
273 extern "C" {
274 static gboolean
275 gtk_frame_configure_callback( GtkWidget* widget,
276 GdkEventConfigure *WXUNUSED(event),
277 wxTopLevelWindowGTK *win )
278 {
279 if (!win->m_hasVMT || !win->IsShown())
280 return FALSE;
281
282 wxPoint point;
283 gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
284
285 win->m_x = point.x;
286 win->m_y = point.y;
287 wxMoveEvent mevent(point, win->GetId());
288 mevent.SetEventObject( win );
289 win->HandleWindowEvent( mevent );
290
291 return FALSE;
292 }
293 }
294
295 //-----------------------------------------------------------------------------
296 // "realize" from m_widget
297 //-----------------------------------------------------------------------------
298
299 // we cannot the WM hints and icons before the widget has been realized,
300 // so we do this directly after realization
301
302 extern "C" {
303 static void
304 gtk_frame_realized_callback( GtkWidget * WXUNUSED(widget),
305 wxTopLevelWindowGTK *win )
306 {
307 gdk_window_set_decorations(win->m_widget->window,
308 (GdkWMDecoration)win->m_gdkDecor);
309 gdk_window_set_functions(win->m_widget->window,
310 (GdkWMFunction)win->m_gdkFunc);
311
312 // GTK's shrinking/growing policy
313 if ( !(win->m_gdkFunc & GDK_FUNC_RESIZE) )
314 gtk_window_set_resizable(GTK_WINDOW(win->m_widget), FALSE);
315 else
316 gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
317
318 const wxIconBundle& icons = win->GetIcons();
319 if (icons.GetIconCount())
320 win->SetIcons(icons);
321
322 if (win->HasFlag(wxFRAME_SHAPED))
323 win->SetShape(win->m_shape); // it will really set the window shape now
324 }
325 }
326
327 //-----------------------------------------------------------------------------
328 // "map_event" from m_widget
329 //-----------------------------------------------------------------------------
330
331 extern "C" {
332 static gboolean
333 gtk_frame_map_callback( GtkWidget*,
334 GdkEvent * WXUNUSED(event),
335 wxTopLevelWindow *win )
336 {
337 const bool wasIconized = win->IsIconized();
338 win->SetIconizeState(false);
339 if (wasIconized)
340 {
341 // Because GetClientSize() returns (0,0) when IsIconized() is true,
342 // a size event must be generated, just in case GetClientSize() was
343 // called while iconized. This specifically happens when restoring a
344 // tlw that was "rolled up" with some WMs.
345 // Queue a resize rather than sending size event directly to allow
346 // children to be made visible first.
347 win->m_oldClientWidth = 0;
348 gtk_widget_queue_resize(win->m_wxwindow);
349 }
350 // it is possible for m_isShown to be false here, see bug #9909
351 if (win->wxWindowBase::Show(true))
352 {
353 wxShowEvent eventShow(win->GetId(), true);
354 eventShow.SetEventObject(win);
355 win->GetEventHandler()->ProcessEvent(eventShow);
356 }
357 return false;
358 }
359 }
360
361 //-----------------------------------------------------------------------------
362 // "unmap_event" from m_widget
363 //-----------------------------------------------------------------------------
364
365 extern "C" {
366 static gboolean
367 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
368 GdkEvent * WXUNUSED(event),
369 wxTopLevelWindow *win )
370 {
371 win->SetIconizeState(true);
372 return false;
373 }
374 }
375
376 //-----------------------------------------------------------------------------
377
378 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
379 {
380 static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
381 Atom xproperty = gdk_x11_atom_to_xatom_for_display(
382 gdk_drawable_get_display(window), property);
383 Atom type;
384 int format;
385 gulong nitems, bytes_after;
386 guchar* data;
387 Status status = XGetWindowProperty(
388 gdk_x11_drawable_get_xdisplay(window),
389 gdk_x11_drawable_get_xid(window),
390 xproperty,
391 0, 4, false, XA_CARDINAL,
392 &type, &format, &nitems, &bytes_after, &data);
393 const bool success = status == Success && data && nitems == 4;
394 if (success)
395 {
396 long* p = (long*)data;
397 if (left) *left = int(p[0]);
398 if (right) *right = int(p[1]);
399 if (top) *top = int(p[2]);
400 if (bottom) *bottom = int(p[3]);
401 }
402 if (data)
403 XFree(data);
404 return success;
405 }
406
407 //-----------------------------------------------------------------------------
408 // "property_notify_event" from m_widget
409 //-----------------------------------------------------------------------------
410
411 extern "C" {
412 static gboolean property_notify_event(
413 GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
414 {
415 // Watch for changes to _NET_FRAME_EXTENTS property
416 static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
417 if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property)
418 {
419 int left, right, top, bottom;
420 if (wxGetFrameExtents(event->window, &left, &right, &top, &bottom))
421 {
422 const wxSize decorSize =
423 wxSize(left + right, top + bottom);
424 win->GTKUpdateDecorSize(decorSize);
425 }
426 }
427 return false;
428 }
429 }
430
431 // ----------------------------------------------------------------------------
432 // wxTopLevelWindowGTK creation
433 // ----------------------------------------------------------------------------
434
435 void wxTopLevelWindowGTK::Init()
436 {
437 m_mainWidget = (GtkWidget*) NULL;
438 m_isIconized = false;
439 m_fsIsShowing = false;
440 m_themeEnabled = true;
441 m_gdkDecor =
442 m_gdkFunc = 0;
443 m_grabbed = false;
444 m_deferShow = true;
445 m_updateDecorSize = true;
446
447 m_urgency_hint = -2;
448 }
449
450 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
451 wxWindowID id,
452 const wxString& title,
453 const wxPoint& pos,
454 const wxSize& sizeOrig,
455 long style,
456 const wxString &name )
457 {
458 // always create a frame of some reasonable, even if arbitrary, size (at
459 // least for MSW compatibility)
460 wxSize size = sizeOrig;
461 size.x = WidthDefault(size.x);
462 size.y = HeightDefault(size.y);
463
464 wxTopLevelWindows.Append( this );
465
466 if (!PreCreation( parent, pos, size ) ||
467 !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
468 {
469 wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
470 return false;
471 }
472
473 m_title = title;
474
475 // NB: m_widget may be !=NULL if it was created by derived class' Create,
476 // e.g. in wxTaskBarIconAreaGTK
477 if (m_widget == NULL)
478 {
479 #if wxUSE_LIBHILDON
480 // we must create HildonWindow and not a normal GtkWindow as the latter
481 // doesn't look correctly in Maemo environment and it must also be
482 // registered with the main program object
483 m_widget = hildon_window_new();
484 hildon_program_add_window(wxTheApp->GetHildonProgram(),
485 HILDON_WINDOW(m_widget));
486 #else // !wxUSE_LIBHILDON
487 m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
488 if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
489 {
490 // Tell WM that this is a dialog window and make it center
491 // on parent by default (this is what GtkDialog ctor does):
492 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
493 GDK_WINDOW_TYPE_HINT_DIALOG);
494 gtk_window_set_position(GTK_WINDOW(m_widget),
495 GTK_WIN_POS_CENTER_ON_PARENT);
496 }
497 else
498 {
499 if (style & wxFRAME_TOOL_WINDOW)
500 {
501 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
502 GDK_WINDOW_TYPE_HINT_UTILITY);
503
504 // On some WMs, like KDE, a TOOL_WINDOW will still show
505 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
506 // For consistency between WMs and with Windows, we
507 // should set the NO_TASKBAR flag which will apply
508 // the set_skip_taskbar_hint if it is available,
509 // ensuring no taskbar entry will appear.
510 style |= wxFRAME_NO_TASKBAR;
511 }
512 }
513 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
514
515 g_object_ref(m_widget);
516 }
517
518 wxWindow *topParent = wxGetTopLevelParent(m_parent);
519 if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
520 (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
521 (style & wxFRAME_FLOAT_ON_PARENT)))
522 {
523 gtk_window_set_transient_for( GTK_WINDOW(m_widget),
524 GTK_WINDOW(topParent->m_widget) );
525 }
526
527 if (style & wxFRAME_NO_TASKBAR)
528 {
529 gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
530 }
531
532 if (style & wxSTAY_ON_TOP)
533 {
534 gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
535 }
536
537 #if 0
538 if (!name.empty())
539 gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
540 #endif
541
542 gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
543 GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
544
545 g_signal_connect (m_widget, "delete_event",
546 G_CALLBACK (gtk_frame_delete_callback), this);
547
548 // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
549 m_mainWidget = gtk_vbox_new(false, 0);
550 gtk_widget_show( m_mainWidget );
551 GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
552 gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
553
554 // m_wxwindow is the client area
555 m_wxwindow = wxPizza::New();
556 gtk_widget_show( m_wxwindow );
557 gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
558
559 // we donm't allow the frame to get the focus as otherwise
560 // the frame will grab it at arbitrary focus changes
561 GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
562
563 if (m_parent) m_parent->AddChild( this );
564
565 g_signal_connect(m_wxwindow, "size_allocate",
566 G_CALLBACK(size_allocate), this);
567
568 g_signal_connect (m_widget, "size_request",
569 G_CALLBACK (wxgtk_tlw_size_request_callback), this);
570 PostCreation();
571
572 if ((m_x != -1) || (m_y != -1))
573 gtk_widget_set_uposition( m_widget, m_x, m_y );
574
575 // we cannot set MWM hints and icons before the widget has
576 // been realized, so we do this directly after realization
577 g_signal_connect (m_widget, "realize",
578 G_CALLBACK (gtk_frame_realized_callback), this);
579
580 // map and unmap for iconized state
581 g_signal_connect (m_widget, "map_event",
582 G_CALLBACK (gtk_frame_map_callback), this);
583 g_signal_connect (m_widget, "unmap_event",
584 G_CALLBACK (gtk_frame_unmap_callback), this);
585
586 // for wxMoveEvent
587 g_signal_connect (m_widget, "configure_event",
588 G_CALLBACK (gtk_frame_configure_callback), this);
589
590 // activation
591 g_signal_connect_after (m_widget, "focus_in_event",
592 G_CALLBACK (gtk_frame_focus_in_callback), this);
593 g_signal_connect_after (m_widget, "focus_out_event",
594 G_CALLBACK (gtk_frame_focus_out_callback), this);
595
596 gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
597 g_signal_connect(m_widget, "property_notify_event",
598 G_CALLBACK(property_notify_event), this);
599
600 // translate wx decorations styles into Motif WM hints (they are recognized
601 // by other WMs as well)
602
603 // always enable moving the window as we have no separate flag for enabling
604 // it
605 m_gdkFunc = GDK_FUNC_MOVE;
606
607 if ( style & wxCLOSE_BOX )
608 m_gdkFunc |= GDK_FUNC_CLOSE;
609
610 if ( style & wxMINIMIZE_BOX )
611 m_gdkFunc |= GDK_FUNC_MINIMIZE;
612
613 if ( style & wxMAXIMIZE_BOX )
614 m_gdkFunc |= GDK_FUNC_MAXIMIZE;
615
616 if ( (style & wxSIMPLE_BORDER) || (style & wxNO_BORDER) )
617 {
618 m_gdkDecor = 0;
619 }
620 else // have border
621 {
622 m_gdkDecor = GDK_DECOR_BORDER;
623
624 if ( style & wxCAPTION )
625 m_gdkDecor |= GDK_DECOR_TITLE;
626
627 if ( style & wxSYSTEM_MENU )
628 m_gdkDecor |= GDK_DECOR_MENU;
629
630 if ( style & wxMINIMIZE_BOX )
631 m_gdkDecor |= GDK_DECOR_MINIMIZE;
632
633 if ( style & wxMAXIMIZE_BOX )
634 m_gdkDecor |= GDK_DECOR_MAXIMIZE;
635
636 if ( style & wxRESIZE_BORDER )
637 {
638 m_gdkFunc |= GDK_FUNC_RESIZE;
639 m_gdkDecor |= GDK_DECOR_RESIZEH;
640 }
641 }
642
643 m_decorSize = GetCachedDecorSize();
644 int w, h;
645 GTKDoGetSize(&w, &h);
646 gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
647
648 return true;
649 }
650
651 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
652 {
653 #if wxUSE_LIBHILDON
654 // it can also be a (standard) dialog
655 if ( HILDON_IS_WINDOW(m_widget) )
656 {
657 hildon_program_remove_window(wxTheApp->GetHildonProgram(),
658 HILDON_WINDOW(m_widget));
659 }
660 #endif // wxUSE_LIBHILDON
661
662 if (m_grabbed)
663 {
664 wxFAIL_MSG(_T("Window still grabbed"));
665 RemoveGrab();
666 }
667
668 m_isBeingDeleted = true;
669
670 // it may also be GtkScrolledWindow in the case of an MDI child
671 if (GTK_IS_WINDOW(m_widget))
672 {
673 gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
674 }
675
676 if (g_activeFrame == this)
677 g_activeFrame = NULL;
678 if (g_lastActiveFrame == this)
679 g_lastActiveFrame = NULL;
680 }
681
682 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
683 {
684 if (enable)
685 m_gdkFunc |= GDK_FUNC_CLOSE;
686 else
687 m_gdkFunc &= ~GDK_FUNC_CLOSE;
688
689 if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
690 gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
691
692 return true;
693 }
694
695 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
696 {
697 if (show == m_fsIsShowing)
698 return false; // return what?
699
700 m_fsIsShowing = show;
701
702 wxX11FullScreenMethod method =
703 wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
704 (WXWindow)GDK_ROOT_WINDOW());
705
706 // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
707 // to switch to fullscreen, which is not always available. We must
708 // check if WM supports the spec and use legacy methods if it
709 // doesn't.
710 if ( method == wxX11_FS_WMSPEC )
711 {
712 if (show)
713 gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
714 else
715 gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
716 }
717 else
718 {
719 GdkWindow *window = m_widget->window;
720
721 if (show)
722 {
723 GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
724 GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
725
726 int screen_width,screen_height;
727 wxDisplaySize( &screen_width, &screen_height );
728
729 gint client_x, client_y, root_x, root_y;
730 gint width, height;
731
732 m_fsSaveGdkFunc = m_gdkFunc;
733 m_fsSaveGdkDecor = m_gdkDecor;
734 m_gdkFunc = m_gdkDecor = 0;
735 gdk_window_set_decorations(window, (GdkWMDecoration)0);
736 gdk_window_set_functions(window, (GdkWMFunction)0);
737
738 gdk_window_get_origin (m_widget->window, &root_x, &root_y);
739 gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
740 &width, &height, NULL);
741
742 gdk_window_move_resize (m_widget->window, -client_x, -client_y,
743 screen_width + 1, screen_height + 1);
744
745 wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
746 (WXWindow)GDK_ROOT_WINDOW(),
747 (WXWindow)GDK_WINDOW_XWINDOW(window),
748 show, &m_fsSaveFrame, method);
749 }
750 else // hide
751 {
752 m_gdkFunc = m_fsSaveGdkFunc;
753 m_gdkDecor = m_fsSaveGdkDecor;
754 gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
755 gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
756
757 wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
758 (WXWindow)GDK_ROOT_WINDOW(),
759 (WXWindow)GDK_WINDOW_XWINDOW(window),
760 show, &m_fsSaveFrame, method);
761
762 SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
763 m_fsSaveFrame.width, m_fsSaveFrame.height);
764 }
765 }
766
767 // documented behaviour is to show the window if it's still hidden when
768 // showing it full screen
769 if (show)
770 Show();
771
772 return true;
773 }
774
775 // ----------------------------------------------------------------------------
776 // overridden wxWindow methods
777 // ----------------------------------------------------------------------------
778
779 bool wxTopLevelWindowGTK::Show( bool show )
780 {
781 wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
782
783 bool deferShow = show && !m_isShown && m_deferShow;
784 if (deferShow)
785 {
786 deferShow = false;
787 if (!GTK_WIDGET_REALIZED(m_widget) &&
788 g_signal_handler_find(m_widget,
789 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
790 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
791 0, NULL, NULL, this))
792 {
793 if (gdk_x11_screen_supports_net_wm_hint(
794 gtk_widget_get_screen(m_widget),
795 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)))
796 {
797 deferShow = true;
798 }
799 else
800 {
801 // Don't allow changes to m_decorSize, it breaks saving/restoring
802 // window size with GetSize()/SetSize() because it makes window
803 // bigger between each restore and save.
804 m_updateDecorSize = false;
805 }
806 }
807 m_deferShow = deferShow;
808 }
809 if (deferShow)
810 {
811 // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
812 // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
813 // notification is received, so correct frame extents are known.
814 // This allows resizing m_widget to keep the overall size in sync with
815 // what wxWidgets expects it to be without an obvious change in the
816 // window size immediately after it becomes visible.
817
818 // Realize m_widget, so m_widget->window can be used. Realizing normally
819 // causes the widget tree to be size_allocated, which generates size
820 // events in the wrong order. However, the size_allocates will not be
821 // done if the allocation is not the default (1,1).
822 const int alloc_width = m_widget->allocation.width;
823 if (alloc_width == 1)
824 m_widget->allocation.width = 2;
825 gtk_widget_realize(m_widget);
826 if (alloc_width == 1)
827 m_widget->allocation.width = 1;
828
829 // send _NET_REQUEST_FRAME_EXTENTS
830 XClientMessageEvent xevent;
831 memset(&xevent, 0, sizeof(xevent));
832 xevent.type = ClientMessage;
833 xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
834 xevent.message_type = gdk_x11_atom_to_xatom_for_display(
835 gdk_drawable_get_display(m_widget->window),
836 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
837 xevent.format = 32;
838 Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
839 XSendEvent(display, DefaultRootWindow(display), false,
840 SubstructureNotifyMask | SubstructureRedirectMask,
841 (XEvent*)&xevent);
842
843 // defer calling gtk_widget_show()
844 m_isShown = true;
845 return true;
846 }
847
848 if (show && !GTK_WIDGET_REALIZED(m_widget))
849 {
850 // size_allocate signals occur in reverse order (bottom to top).
851 // Things work better if the initial wxSizeEvents are sent (from the
852 // top down), before the initial size_allocate signals occur.
853 wxSizeEvent event(GetSize(), GetId());
854 event.SetEventObject(this);
855 HandleWindowEvent(event);
856 }
857
858 bool change = wxTopLevelWindowBase::Show(show);
859
860 if (change && !show)
861 {
862 // make sure window has a non-default position, so when it is shown
863 // again, it won't be repositioned by WM as if it were a new window
864 // Note that this must be done _after_ the window is hidden.
865 gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
866 }
867
868 return change;
869 }
870
871 void wxTopLevelWindowGTK::Raise()
872 {
873 gtk_window_present( GTK_WINDOW( m_widget ) );
874 }
875
876 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
877 {
878 wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
879 }
880
881 // ----------------------------------------------------------------------------
882 // window geometry
883 // ----------------------------------------------------------------------------
884
885 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
886 {
887 wxSize size(m_width, m_height);
888 size -= m_decorSize;
889 if (size.x < 0) size.x = 0;
890 if (size.y < 0) size.y = 0;
891 if (width) *width = size.x;
892 if (height) *height = size.y;
893 }
894
895 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
896 {
897 wxCHECK_RET( m_widget, wxT("invalid frame") );
898
899 // deal with the position first
900 int old_x = m_x;
901 int old_y = m_y;
902
903 if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
904 {
905 // -1 means "use existing" unless the flag above is specified
906 if ( x != -1 )
907 m_x = x;
908 if ( y != -1 )
909 m_y = y;
910 }
911 else // wxSIZE_ALLOW_MINUS_ONE
912 {
913 m_x = x;
914 m_y = y;
915 }
916
917 if ( m_x != old_x || m_y != old_y )
918 {
919 gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
920 }
921
922 const wxSize oldSize(m_width, m_height);
923 if (width >= 0)
924 m_width = width;
925 if (height >= 0)
926 m_height = height;
927 ConstrainSize();
928 if (m_width != oldSize.x || m_height != oldSize.y)
929 {
930 int w, h;
931 GTKDoGetSize(&w, &h);
932 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
933
934 GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
935 wxSizeEvent event(GetSize(), GetId());
936 event.SetEventObject(this);
937 HandleWindowEvent(event);
938 }
939 }
940
941 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
942 {
943 if (m_deferShow && !m_isShown)
944 // Since client size is being explicitly set, don't change it later
945 m_deferShow = false;
946 wxTopLevelWindowBase::DoSetClientSize(width, height);
947 }
948
949 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
950 {
951 wxASSERT_MSG(m_widget, wxT("invalid frame"));
952
953 if ( IsIconized() )
954 {
955 // for consistency with wxMSW, client area is supposed to be empty for
956 // the iconized windows
957 if ( width )
958 *width = 0;
959 if ( height )
960 *height = 0;
961 }
962 else
963 {
964 GTKDoGetSize(width, height);
965 }
966 }
967
968 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
969 int maxW, int maxH,
970 int incW, int incH )
971 {
972 wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
973
974 const wxSize minSize = GetMinSize();
975 const wxSize maxSize = GetMaxSize();
976 GdkGeometry hints;
977 int hints_mask = 0;
978 if (minSize.x > 0 || minSize.y > 0)
979 {
980 hints_mask |= GDK_HINT_MIN_SIZE;
981 hints.min_width = minSize.x - m_decorSize.x;
982 if (hints.min_width < 0)
983 hints.min_width = 0;
984 hints.min_height = minSize.y - m_decorSize.y;
985 if (hints.min_height < 0)
986 hints.min_height = 0;
987 }
988 if (maxSize.x > 0 || maxSize.y > 0)
989 {
990 hints_mask |= GDK_HINT_MAX_SIZE;
991 hints.max_width = maxSize.x - m_decorSize.x;
992 if (hints.max_width < 0)
993 hints.max_width = INT_MAX;
994 hints.max_height = maxSize.y - m_decorSize.y;
995 if (hints.max_height < 0)
996 hints.max_height = INT_MAX;
997 }
998 if (incW > 0 || incH > 0)
999 {
1000 hints_mask |= GDK_HINT_RESIZE_INC;
1001 hints.width_inc = incW > 0 ? incW : 1;
1002 hints.height_inc = incH > 0 ? incH : 1;
1003 }
1004 gtk_window_set_geometry_hints(
1005 (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
1006 }
1007
1008 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
1009 {
1010 if (!IsMaximized() && !IsFullScreen())
1011 GetCachedDecorSize() = decorSize;
1012 if (m_updateDecorSize && m_decorSize != decorSize)
1013 {
1014 const wxSize diff = decorSize - m_decorSize;
1015 m_decorSize = decorSize;
1016 bool resized = false;
1017 if (m_deferShow)
1018 {
1019 // keep overall size unchanged by shrinking m_widget
1020 int w, h;
1021 GTKDoGetSize(&w, &h);
1022 // but not if size would be less than minimum, it won't take effect
1023 const wxSize minSize = GetMinSize();
1024 if (w >= minSize.x && h >= minSize.y)
1025 {
1026 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
1027 resized = true;
1028 }
1029 }
1030 if (!resized)
1031 {
1032 // adjust overall size to match change in frame extents
1033 m_width += diff.x;
1034 m_height += diff.y;
1035 if (m_width < 0) m_width = 0;
1036 if (m_height < 0) m_height = 0;
1037 m_oldClientWidth = 0;
1038 gtk_widget_queue_resize(m_wxwindow);
1039 }
1040 }
1041 if (m_deferShow)
1042 {
1043 // gtk_widget_show() was deferred, do it now
1044 m_deferShow = false;
1045 GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1046 wxSizeEvent sizeEvent(GetSize(), GetId());
1047 sizeEvent.SetEventObject(this);
1048 HandleWindowEvent(sizeEvent);
1049
1050 gtk_widget_show(m_widget);
1051
1052 wxShowEvent showEvent(GetId(), true);
1053 showEvent.SetEventObject(this);
1054 HandleWindowEvent(showEvent);
1055 }
1056 }
1057
1058 wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
1059 {
1060 static wxSize size[8];
1061
1062 int index = 0;
1063 // title bar
1064 if (m_gdkDecor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
1065 index = 1;
1066 // border
1067 if (m_gdkDecor & GDK_DECOR_BORDER)
1068 index |= 2;
1069 // utility window decor can be different
1070 if (m_windowStyle & wxFRAME_TOOL_WINDOW)
1071 index |= 4;
1072 return size[index];
1073 }
1074
1075 void wxTopLevelWindowGTK::OnInternalIdle()
1076 {
1077 wxWindow::OnInternalIdle();
1078
1079 // Synthetize activate events.
1080 if ( g_sendActivateEvent != -1 )
1081 {
1082 bool activate = g_sendActivateEvent != 0;
1083
1084 // if (!activate) wxPrintf( wxT("de") );
1085 // wxPrintf( wxT("activate\n") );
1086
1087 // do it only once
1088 g_sendActivateEvent = -1;
1089
1090 wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1091 }
1092 }
1093
1094 // ----------------------------------------------------------------------------
1095 // frame title/icon
1096 // ----------------------------------------------------------------------------
1097
1098 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1099 {
1100 wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1101
1102 if ( title == m_title )
1103 return;
1104
1105 m_title = title;
1106
1107 gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1108 }
1109
1110 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1111 {
1112 wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1113
1114 wxTopLevelWindowBase::SetIcons( icons );
1115
1116 // Setting icons before window is realized can cause a GTK assertion if
1117 // another TLW is realized before this one, and it has this one as it's
1118 // transient parent. The life demo exibits this problem.
1119 if (GTK_WIDGET_REALIZED(m_widget))
1120 {
1121 GList* list = NULL;
1122 for (size_t i = icons.GetIconCount(); i--;)
1123 list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1124 gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1125 g_list_free(list);
1126 }
1127 }
1128
1129 // ----------------------------------------------------------------------------
1130 // frame state: maximized/iconized/normal
1131 // ----------------------------------------------------------------------------
1132
1133 void wxTopLevelWindowGTK::Maximize(bool maximize)
1134 {
1135 if (maximize)
1136 gtk_window_maximize( GTK_WINDOW( m_widget ) );
1137 else
1138 gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1139 }
1140
1141 bool wxTopLevelWindowGTK::IsMaximized() const
1142 {
1143 if(!m_widget->window)
1144 return false;
1145
1146 return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1147 }
1148
1149 void wxTopLevelWindowGTK::Restore()
1150 {
1151 // "Present" seems similar enough to "restore"
1152 gtk_window_present( GTK_WINDOW( m_widget ) );
1153 }
1154
1155 void wxTopLevelWindowGTK::Iconize( bool iconize )
1156 {
1157 if (iconize)
1158 gtk_window_iconify( GTK_WINDOW( m_widget ) );
1159 else
1160 gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1161 }
1162
1163 bool wxTopLevelWindowGTK::IsIconized() const
1164 {
1165 return m_isIconized;
1166 }
1167
1168 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1169 {
1170 if ( iconize != m_isIconized )
1171 {
1172 m_isIconized = iconize;
1173 (void)SendIconizeEvent(iconize);
1174 }
1175 }
1176
1177 void wxTopLevelWindowGTK::AddGrab()
1178 {
1179 if (!m_grabbed)
1180 {
1181 m_grabbed = true;
1182 gtk_grab_add( m_widget );
1183 wxGUIEventLoop().Run();
1184 gtk_grab_remove( m_widget );
1185 }
1186 }
1187
1188 void wxTopLevelWindowGTK::RemoveGrab()
1189 {
1190 if (m_grabbed)
1191 {
1192 gtk_main_quit();
1193 m_grabbed = false;
1194 }
1195 }
1196
1197
1198 // helper
1199 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1200 {
1201 if (window)
1202 {
1203 if (region.IsEmpty())
1204 {
1205 gdk_window_shape_combine_mask(window, NULL, 0, 0);
1206 }
1207 else
1208 {
1209 gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1210 return true;
1211 }
1212 }
1213 return false;
1214 }
1215
1216
1217 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1218 {
1219 wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1220 _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1221
1222 if ( GTK_WIDGET_REALIZED(m_widget) )
1223 {
1224 if ( m_wxwindow )
1225 do_shape_combine_region(m_wxwindow->window, region);
1226
1227 return do_shape_combine_region(m_widget->window, region);
1228 }
1229 else // not realized yet
1230 {
1231 // store the shape to set, it will be really set once we're realized
1232 m_shape = region;
1233
1234 // we don't know if we're going to succeed or fail, be optimistic by
1235 // default
1236 return true;
1237 }
1238 }
1239
1240 bool wxTopLevelWindowGTK::IsActive()
1241 {
1242 return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1243 }
1244
1245 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1246 {
1247 bool new_hint_value = false;
1248
1249 // FIXME: This is a workaround to focus handling problem
1250 // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1251 // yet been processed, and the internal focus system is not up to date yet.
1252 // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1253 ::wxYieldIfNeeded();
1254
1255 if(m_urgency_hint >= 0)
1256 g_source_remove(m_urgency_hint);
1257
1258 m_urgency_hint = -2;
1259
1260 if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1261 {
1262 new_hint_value = true;
1263
1264 if (flags & wxUSER_ATTENTION_INFO)
1265 {
1266 m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1267 } else {
1268 m_urgency_hint = -1;
1269 }
1270 }
1271
1272 #if GTK_CHECK_VERSION(2,7,0)
1273 if(!gtk_check_version(2,7,0))
1274 gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1275 else
1276 #endif
1277 wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1278 }
1279
1280 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1281 {
1282 // Store which styles were changed
1283 long styleChanges = style ^ m_windowStyle;
1284
1285 // Process wxWindow styles. This also updates the internal variable
1286 // Therefore m_windowStyle bits carry now the _new_ style values
1287 wxWindow::SetWindowStyleFlag(style);
1288
1289 // just return for now if widget does not exist yet
1290 if (!m_widget)
1291 return;
1292
1293 if ( styleChanges & wxSTAY_ON_TOP )
1294 {
1295 gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1296 m_windowStyle & wxSTAY_ON_TOP);
1297 }
1298
1299 if ( styleChanges & wxFRAME_NO_TASKBAR )
1300 {
1301 gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1302 m_windowStyle & wxFRAME_NO_TASKBAR);
1303 }
1304 }
1305
1306 /* Get the X Window between child and the root window.
1307 This should usually be the WM managed XID */
1308 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1309 {
1310 Window root, parent;
1311 Window* children;
1312 unsigned int nchildren;
1313
1314 XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1315 XFree(children);
1316
1317 while (parent != root) {
1318 child = parent;
1319 XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1320 XFree(children);
1321 }
1322
1323 return child;
1324 }
1325
1326 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1327 {
1328 if (!m_widget || !m_widget->window)
1329 return false;
1330
1331 Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1332 // We need to get the X Window that has the root window as the immediate parent
1333 // and m_widget->window as a child. This should be the X Window that the WM manages and
1334 // from which the opacity property is checked from.
1335 Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1336
1337
1338 // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1339 if (alpha == 0xff)
1340 XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1341 else
1342 {
1343 long opacity = alpha * 0x1010101L;
1344 XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1345 XA_CARDINAL, 32, PropModeReplace,
1346 (unsigned char *) &opacity, 1L);
1347 }
1348 XSync(dpy, False);
1349 return true;
1350 }
1351
1352 bool wxTopLevelWindowGTK::CanSetTransparent()
1353 {
1354 // allow to override automatic detection as it's far from perfect
1355 static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1356 if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1357 {
1358 return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1359 }
1360
1361 #if GTK_CHECK_VERSION(2,10,0)
1362 if (!gtk_check_version(2,10,0))
1363 {
1364 return (gtk_widget_is_composited (m_widget));
1365 }
1366 else
1367 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1368 {
1369 return false;
1370 }
1371
1372 #if 0 // Don't be optimistic here for the sake of wxAUI
1373 int opcode, event, error;
1374 // Check for the existence of a RGBA visual instead?
1375 return XQueryExtension(gdk_x11_get_default_xdisplay (),
1376 "Composite", &opcode, &event, &error);
1377 #endif
1378 }
wxWidgets (Impactor)