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/win_gtk.h"
  42
  43 #include "wx/unix/utilsx11.h"
  44
  45 // XA_CARDINAL
  46 #include <X11/Xatom.h>
  47
  48 // ----------------------------------------------------------------------------
  49 // data
  50 // ----------------------------------------------------------------------------
  51
  52 extern int              g_openDialogs;
  53 extern wxWindowGTK     *g_delayedFocus;
  54
  55 // the frame that is currently active (i.e. its child has focus). It is
  56 // used to generate wxActivateEvents
  57 static wxTopLevelWindowGTK *g_activeFrame = (wxTopLevelWindowGTK*) NULL;
  58 static wxTopLevelWindowGTK *g_lastActiveFrame = (wxTopLevelWindowGTK*) NULL;
  59
  60 // if we detect that the app has got/lost the focus, we set this variable to
  61 // either TRUE or FALSE and an activate event will be sent during the next
  62 // OnIdle() call and it is reset to -1: this value means that we shouldn't
  63 // send any activate events at all
  64 static int g_sendActivateEvent = -1;
  65
  66 //-----------------------------------------------------------------------------
  67 // RequestUserAttention related functions
  68 //-----------------------------------------------------------------------------
  69
  70 extern "C" {
  71 static void wxgtk_window_set_urgency_hint (GtkWindow *win,
  72                                            gboolean setting)
  73 {
  74     wxASSERT_MSG( GTK_WIDGET_REALIZED(win), wxT("wxgtk_window_set_urgency_hint: GdkWindow not realized") );
  75     GdkWindow *window = GTK_WIDGET(win)->window;
  76     XWMHints *wm_hints;
  77
  78     wm_hints = XGetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window));
  79
  80     if (!wm_hints)
  81         wm_hints = XAllocWMHints();
  82
  83     if (setting)
  84         wm_hints->flags |= XUrgencyHint;
  85     else
  86         wm_hints->flags &= ~XUrgencyHint;
  87
  88     XSetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window), wm_hints);
  89     XFree(wm_hints);
  90 }
  91
  92 static gboolean gtk_frame_urgency_timer_callback( wxTopLevelWindowGTK *win )
  93 {
  94 #if GTK_CHECK_VERSION(2,7,0)
  95     if(!gtk_check_version(2,7,0))
  96         gtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
  97     else
  98 #endif
  99         wxgtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 100
 101     win->m_urgency_hint = -2;
 102     return FALSE;
 103 }
 104 }
 105
 106 //-----------------------------------------------------------------------------
 107 // "focus_in_event"
 108 //-----------------------------------------------------------------------------
 109
 110 extern "C" {
 111 static gboolean gtk_frame_focus_in_callback( GtkWidget *widget,
 112                                          GdkEvent *WXUNUSED(event),
 113                                          wxTopLevelWindowGTK *win )
 114 {
 115     switch ( g_sendActivateEvent )
 116     {
 117         case -1:
 118             // we've got focus from outside, synthetize wxActivateEvent
 119             g_sendActivateEvent = 1;
 120             break;
 121
 122         case 0:
 123             // another our window just lost focus, it was already ours before
 124             // - don't send any wxActivateEvent
 125             g_sendActivateEvent = -1;
 126             break;
 127     }
 128
 129     g_activeFrame = win;
 130     g_lastActiveFrame = g_activeFrame;
 131
 132     // wxPrintf( wxT("active: %s\n"), win->GetTitle().c_str() );
 133
 134     // MR: wxRequestUserAttention related block
 135     switch( win->m_urgency_hint )
 136     {
 137         default:
 138             g_source_remove( win->m_urgency_hint );
 139             // no break, fallthrough to remove hint too
 140         case -1:
 141 #if GTK_CHECK_VERSION(2,7,0)
 142             if(!gtk_check_version(2,7,0))
 143                 gtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 144             else
 145 #endif
 146             {
 147                 wxgtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 148             }
 149
 150             win->m_urgency_hint = -2;
 151             break;
 152
 153         case -2: break;
 154     }
 155
 156     wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 157     wxActivateEvent event(wxEVT_ACTIVATE, true, g_activeFrame->GetId());
 158     event.SetEventObject(g_activeFrame);
 159     g_activeFrame->GetEventHandler()->ProcessEvent(event);
 160
 161     return FALSE;
 162 }
 163 }
 164
 165 //-----------------------------------------------------------------------------
 166 // "focus_out_event"
 167 //-----------------------------------------------------------------------------
 168
 169 extern "C" {
 170 static
 171 gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
 172                                       GdkEventFocus *WXUNUSED(gdk_event),
 173                                       wxTopLevelWindowGTK * WXUNUSED(win))
 174 {
 175     // if the focus goes out of our app alltogether, OnIdle() will send
 176     // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
 177     // g_sendActivateEvent to -1
 178     g_sendActivateEvent = 0;
 179
 180     // wxASSERT_MSG( (g_activeFrame == win), wxT("TLW deactivatd although it wasn't active") );
 181
 182     // wxPrintf( wxT("inactive: %s\n"), win->GetTitle().c_str() );
 183
 184     if (g_activeFrame)
 185     {
 186         wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 187         wxActivateEvent event(wxEVT_ACTIVATE, false, g_activeFrame->GetId());
 188         event.SetEventObject(g_activeFrame);
 189         g_activeFrame->GetEventHandler()->ProcessEvent(event);
 190
 191         g_activeFrame = NULL;
 192     }
 193
 194     return FALSE;
 195 }
 196 }
 197
 198 //-----------------------------------------------------------------------------
 199
 200 // Get cached size of WM decorations for given GdkWMDecoration.
 201 static wxSize& GetDecorSize(int decor)
 202 {
 203     // In testing, only the title bar and GDK_DECOR_BORDER made a difference.
 204     // 4 possible combinations of title bar and border
 205     static wxSize size[4];
 206
 207     int index = 0;
 208     // title bar
 209     if (decor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
 210         index = 1;
 211     // border
 212     if (decor & GDK_DECOR_BORDER)
 213         index |= 2;
 214     return size[index];
 215 }
 216
 217 //-----------------------------------------------------------------------------
 218 // "size_allocate" from m_wxwindow
 219 //-----------------------------------------------------------------------------
 220
 221 extern "C" {
 222 static void
 223 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
 224 {
 225     if (win->m_oldClientWidth  != alloc->width ||
 226         win->m_oldClientHeight != alloc->height)
 227     {
 228         win->m_oldClientWidth  = alloc->width;
 229         win->m_oldClientHeight = alloc->height;
 230         wxSize sizeDecor;
 231         if (!win->IsFullScreen())
 232             sizeDecor = GetDecorSize(win->m_gdkDecor);
 233         win->m_width  = win->m_widget->allocation.width  + sizeDecor.x;
 234         win->m_height = win->m_widget->allocation.height + sizeDecor.y;
 235         if (!win->IsIconized())
 236         {
 237             wxSizeEvent event(win->GetSize(), win->GetId());
 238             event.SetEventObject(win);
 239             win->GetEventHandler()->ProcessEvent(event);
 240         }
 241         // else the window is currently unmapped, don't generate size events
 242     }
 243 }
 244 }
 245
 246 // ----------------------------------------------------------------------------
 247 // "size_request"
 248 // ----------------------------------------------------------------------------
 249
 250 extern "C" {
 251 static
 252 void wxgtk_tlw_size_request_callback(GtkWidget * WXUNUSED(widget),
 253                                      GtkRequisition *requisition,
 254                                      wxTopLevelWindowGTK *win)
 255 {
 256     // we must return the size of the window without WM decorations, otherwise
 257     // GTK+ gets confused, so don't call just GetSize() here
 258     win->GTKDoGetSize(&requisition->width, &requisition->height);
 259 }
 260 }
 261
 262 //-----------------------------------------------------------------------------
 263 // "delete_event"
 264 //-----------------------------------------------------------------------------
 265
 266 extern "C" {
 267 static gboolean
 268 gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
 269                            GdkEvent *WXUNUSED(event),
 270                            wxTopLevelWindowGTK *win )
 271 {
 272     if (win->IsEnabled() &&
 273         (g_openDialogs == 0 || (win->GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) ||
 274          win->IsGrabbed()))
 275         win->Close();
 276
 277     return TRUE;
 278 }
 279 }
 280
 281
 282 //-----------------------------------------------------------------------------
 283 // "configure_event"
 284 //-----------------------------------------------------------------------------
 285
 286 extern "C" {
 287 static gboolean
 288 gtk_frame_configure_callback( GtkWidget* widget,
 289                               GdkEventConfigure *WXUNUSED(event),
 290                               wxTopLevelWindowGTK *win )
 291 {
 292     if (!win->m_hasVMT || !win->IsShown())
 293         return FALSE;
 294
 295     wxPoint point;
 296     gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
 297
 298     win->m_x = point.x;
 299     win->m_y = point.y;
 300     wxMoveEvent mevent(point, win->GetId());
 301     mevent.SetEventObject( win );
 302     win->GetEventHandler()->ProcessEvent( mevent );
 303
 304     return FALSE;
 305 }
 306 }
 307
 308 //-----------------------------------------------------------------------------
 309 // "realize" from m_widget
 310 //-----------------------------------------------------------------------------
 311
 312 // we cannot MWM hints and icons before the widget has been realized,
 313 // so we do this directly after realization
 314
 315 extern "C" {
 316 static void
 317 gtk_frame_realized_callback( GtkWidget * WXUNUSED(widget),
 318                              wxTopLevelWindowGTK *win )
 319 {
 320     // All this is for Motif Window Manager "hints" and is supposed to be
 321     // recognized by other WM as well. Not tested.
 322     gdk_window_set_decorations(win->m_widget->window,
 323                                (GdkWMDecoration)win->m_gdkDecor);
 324     gdk_window_set_functions(win->m_widget->window,
 325                                (GdkWMFunction)win->m_gdkFunc);
 326
 327     // GTK's shrinking/growing policy
 328     if ((win->m_gdkFunc & GDK_FUNC_RESIZE) == 0)
 329         gtk_window_set_resizable(GTK_WINDOW(win->m_widget), FALSE);
 330     else
 331         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 332
 333     // reset the icon
 334     wxIconBundle iconsOld = win->GetIcons();
 335     if ( !iconsOld.IsEmpty() )
 336     {
 337         win->SetIcon( wxNullIcon );
 338         win->SetIcons( iconsOld );
 339     }
 340 }
 341 }
 342
 343 //-----------------------------------------------------------------------------
 344 // "map_event" from m_widget
 345 //-----------------------------------------------------------------------------
 346
 347 extern "C" {
 348 static gboolean
 349 gtk_frame_map_callback( GtkWidget* widget,
 350                         GdkEvent * WXUNUSED(event),
 351                         wxTopLevelWindow *win )
 352 {
 353     // Calculate size of WM decorations.
 354     // Done here in case WM does not support the _NET_FRAME_EXTENTS property.
 355     if (win->IsDecorCacheable() && !win->IsFullScreen())
 356     {
 357         GdkRectangle rect;
 358         gdk_window_get_frame_extents(widget->window, &rect);
 359         int w, h;
 360         gdk_drawable_get_size(widget->window, &w, &h);
 361         wxSize& decorSize = GetDecorSize(win->m_gdkDecor);
 362         const wxSize size = wxSize(rect.width - w, rect.height - h);
 363         if (decorSize.x != size.x || decorSize.y != size.y)
 364         {
 365             // Update window size and frame extents cache
 366             win->m_width = rect.width;
 367             win->m_height = rect.height;
 368             decorSize = size;
 369             wxSizeEvent event(win->GetSize(), win->GetId());
 370             event.SetEventObject(win);
 371             win->GetEventHandler()->ProcessEvent(event);
 372         }
 373     }
 374
 375     win->SetIconizeState(false);
 376     return false;
 377 }
 378 }
 379
 380 //-----------------------------------------------------------------------------
 381 // "unmap_event" from m_widget
 382 //-----------------------------------------------------------------------------
 383
 384 extern "C" {
 385 static gboolean
 386 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
 387                           GdkEvent * WXUNUSED(event),
 388                           wxTopLevelWindow *win )
 389 {
 390     win->SetIconizeState(true);
 391     return false;
 392 }
 393 }
 394
 395 //-----------------------------------------------------------------------------
 396 // "property_notify_event" from m_widget
 397 //-----------------------------------------------------------------------------
 398
 399 extern "C" {
 400 static gboolean property_notify_event(
 401     GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
 402 {
 403     // Watch for changes to _NET_FRAME_EXTENTS property
 404     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 405     if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property &&
 406         win->IsDecorCacheable() && !win->IsFullScreen())
 407     {
 408         Atom xproperty;
 409 #if GTK_CHECK_VERSION(2, 2, 0)
 410         if (gtk_check_version(2, 2, 0) == NULL)
 411         {
 412             xproperty = gdk_x11_atom_to_xatom_for_display(
 413                 gdk_drawable_get_display(event->window), property);
 414         }
 415         else
 416 #endif
 417         {
 418             xproperty = gdk_x11_atom_to_xatom(property);
 419         }
 420         Atom type;
 421         int format;
 422         gulong nitems, bytes_after;
 423         long* data = NULL;
 424         Status status = XGetWindowProperty(
 425             gdk_x11_drawable_get_xdisplay(event->window),
 426             gdk_x11_drawable_get_xid(event->window),
 427             xproperty,
 428             0, 4, false, XA_CARDINAL,
 429             &type, &format, &nitems, &bytes_after, (guchar**)&data);
 430         if (status == Success && data && nitems == 4)
 431         {
 432             wxSize& decorSize = GetDecorSize(win->m_gdkDecor);
 433             const wxSize size =
 434                 wxSize(int(data[0] + data[1]), int(data[2] + data[3]));
 435             if (decorSize.x != size.x || decorSize.y != size.y)
 436             {
 437                 // Update window size and frame extents cache
 438                 win->m_width  += size.x - decorSize.x;
 439                 win->m_height += size.y - decorSize.y;
 440                 if (win->m_width  < 0) win->m_width  = 0;
 441                 if (win->m_height < 0) win->m_height = 0;
 442                 decorSize = size;
 443                 wxSizeEvent event(win->GetSize(), win->GetId());
 444                 event.SetEventObject(win);
 445                 win->GetEventHandler()->ProcessEvent(event);
 446             }
 447         }
 448         if (data)
 449             XFree(data);
 450     }
 451     return false;
 452 }
 453 }
 454
 455 BEGIN_EVENT_TABLE(wxTopLevelWindowGTK, wxTopLevelWindowBase)
 456     EVT_SYS_COLOUR_CHANGED(wxTopLevelWindowGTK::OnSysColourChanged)
 457 END_EVENT_TABLE()
 458
 459
 460 // ----------------------------------------------------------------------------
 461 // wxTopLevelWindowGTK creation
 462 // ----------------------------------------------------------------------------
 463
 464 void wxTopLevelWindowGTK::Init()
 465 {
 466     m_mainWidget = (GtkWidget*) NULL;
 467     m_isIconized = false;
 468     m_fsIsShowing = false;
 469     m_themeEnabled = true;
 470     m_gdkDecor = m_gdkFunc = 0;
 471     m_grabbed = false;
 472
 473     m_urgency_hint = -2;
 474 }
 475
 476 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 477                                   wxWindowID id,
 478                                   const wxString& title,
 479                                   const wxPoint& pos,
 480                                   const wxSize& sizeOrig,
 481                                   long style,
 482                                   const wxString &name )
 483 {
 484     // always create a frame of some reasonable, even if arbitrary, size (at
 485     // least for MSW compatibility)
 486     wxSize size = sizeOrig;
 487     size.x = WidthDefault(size.x);
 488     size.y = HeightDefault(size.y);
 489
 490     wxTopLevelWindows.Append( this );
 491
 492     if (!PreCreation( parent, pos, size ) ||
 493         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 494     {
 495         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 496         return false;
 497     }
 498
 499     m_title = title;
 500
 501     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 502     //     e.g. in wxTaskBarIconAreaGTK
 503     if (m_widget == NULL)
 504     {
 505         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 506         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 507         {
 508             // Tell WM that this is a dialog window and make it center
 509             // on parent by default (this is what GtkDialog ctor does):
 510             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 511                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 512             gtk_window_set_position(GTK_WINDOW(m_widget),
 513                                     GTK_WIN_POS_CENTER_ON_PARENT);
 514         }
 515         else
 516         {
 517 #if GTK_CHECK_VERSION(2,1,0)
 518             if (!gtk_check_version(2,1,0))
 519             {
 520                 if (style & wxFRAME_TOOL_WINDOW)
 521                 {
 522                     gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 523                                              GDK_WINDOW_TYPE_HINT_UTILITY);
 524
 525                     // On some WMs, like KDE, a TOOL_WINDOW will still show
 526                     // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 527                     // For consistency between WMs and with Windows, we
 528                     // should set the NO_TASKBAR flag which will apply
 529                     // the set_skip_taskbar_hint if it is available,
 530                     // ensuring no taskbar entry will appear.
 531                     style |= wxFRAME_NO_TASKBAR;
 532                 }
 533             }
 534 #endif
 535         }
 536     }
 537
 538     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 539     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 540                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 541                        (style & wxFRAME_FLOAT_ON_PARENT)))
 542     {
 543         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 544                                       GTK_WINDOW(topParent->m_widget) );
 545     }
 546
 547 #if GTK_CHECK_VERSION(2,2,0)
 548     if (!gtk_check_version(2,2,0))
 549     {
 550         if (style & wxFRAME_NO_TASKBAR)
 551         {
 552             gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 553         }
 554     }
 555 #endif
 556
 557 #ifdef __WXGTK24__
 558     if (!gtk_check_version(2,4,0))
 559     {
 560         if (style & wxSTAY_ON_TOP)
 561         {
 562             gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 563         }
 564     }
 565 #endif
 566
 567 #if 0
 568     if (!name.empty())
 569         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 570 #endif
 571
 572     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 573     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 574
 575     g_signal_connect (m_widget, "delete_event",
 576                       G_CALLBACK (gtk_frame_delete_callback), this);
 577
 578     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 579     m_mainWidget = gtk_vbox_new(false, 0);
 580     gtk_widget_show( m_mainWidget );
 581     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 582     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 583
 584     // m_wxwindow is the client area
 585     m_wxwindow = gtk_pizza_new_no_scroll();
 586     gtk_widget_show( m_wxwindow );
 587     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 588
 589     // we donm't allow the frame to get the focus as otherwise
 590     // the frame will grab it at arbitrary focus changes
 591     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 592
 593     if (m_parent) m_parent->AddChild( this );
 594
 595     g_signal_connect(m_wxwindow, "size_allocate",
 596         G_CALLBACK(size_allocate), this);
 597
 598     g_signal_connect (m_widget, "size_request",
 599                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 600     PostCreation();
 601
 602     if ((m_x != -1) || (m_y != -1))
 603         gtk_widget_set_uposition( m_widget, m_x, m_y );
 604
 605     //  we cannot set MWM hints and icons before the widget has
 606     //  been realized, so we do this directly after realization
 607     g_signal_connect (m_widget, "realize",
 608                       G_CALLBACK (gtk_frame_realized_callback), this);
 609
 610     // map and unmap for iconized state
 611     g_signal_connect (m_widget, "map_event",
 612                       G_CALLBACK (gtk_frame_map_callback), this);
 613     g_signal_connect (m_widget, "unmap_event",
 614                       G_CALLBACK (gtk_frame_unmap_callback), this);
 615
 616     // for wxMoveEvent
 617     g_signal_connect (m_widget, "configure_event",
 618                       G_CALLBACK (gtk_frame_configure_callback), this);
 619
 620     // activation
 621     g_signal_connect_after (m_widget, "focus_in_event",
 622                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 623     g_signal_connect_after (m_widget, "focus_out_event",
 624                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 625
 626     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 627     g_signal_connect(m_widget, "property_notify_event",
 628         G_CALLBACK(property_notify_event), this);
 629
 630     // decorations
 631     if ((style & wxSIMPLE_BORDER) || (style & wxNO_BORDER))
 632     {
 633         m_gdkDecor = 0;
 634         m_gdkFunc = 0;
 635     }
 636     else
 637     {
 638         m_gdkDecor = GDK_DECOR_BORDER;
 639         m_gdkFunc = GDK_FUNC_MOVE;
 640
 641         // All this is for Motif Window Manager "hints" and is supposed to be
 642         // recognized by other WMs as well.
 643         if ((style & wxCAPTION) != 0)
 644         {
 645             m_gdkDecor |= GDK_DECOR_TITLE;
 646         }
 647         if ((style & wxCLOSE_BOX) != 0)
 648         {
 649             m_gdkFunc |= GDK_FUNC_CLOSE;
 650         }
 651         if ((style & wxSYSTEM_MENU) != 0)
 652         {
 653             m_gdkDecor |= GDK_DECOR_MENU;
 654         }
 655         if ((style & wxMINIMIZE_BOX) != 0)
 656         {
 657             m_gdkFunc |= GDK_FUNC_MINIMIZE;
 658             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 659         }
 660         if ((style & wxMAXIMIZE_BOX) != 0)
 661         {
 662             m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 663             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 664         }
 665         if ((style & wxRESIZE_BORDER) != 0)
 666         {
 667            m_gdkFunc |= GDK_FUNC_RESIZE;
 668            m_gdkDecor |= GDK_DECOR_RESIZEH;
 669         }
 670     }
 671
 672     // m_gdkDecor needs to be set before calling GTKDoGetSize
 673     int w, h;
 674     GTKDoGetSize(&w, &h);
 675     gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
 676
 677     return true;
 678 }
 679
 680 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 681 {
 682     if (m_grabbed)
 683     {
 684         wxFAIL_MSG(_T("Window still grabbed"));
 685         RemoveGrab();
 686     }
 687
 688     m_isBeingDeleted = true;
 689
 690     // it may also be GtkScrolledWindow in the case of an MDI child
 691     if (GTK_IS_WINDOW(m_widget))
 692     {
 693         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 694     }
 695
 696     if (g_activeFrame == this)
 697         g_activeFrame = NULL;
 698     if (g_lastActiveFrame == this)
 699         g_lastActiveFrame = NULL;
 700 }
 701
 702 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 703 {
 704     if (enable)
 705         m_gdkFunc |= GDK_FUNC_CLOSE;
 706     else
 707         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 708
 709     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 710         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 711
 712     return true;
 713 }
 714
 715 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 716 {
 717     if (show == m_fsIsShowing)
 718         return false; // return what?
 719
 720     m_fsIsShowing = show;
 721
 722     wxX11FullScreenMethod method =
 723         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 724                                  (WXWindow)GDK_ROOT_WINDOW());
 725
 726 #if GTK_CHECK_VERSION(2,2,0)
 727     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 728     //     to switch to fullscreen, which is not always available. We must
 729     //     check if WM supports the spec and use legacy methods if it
 730     //     doesn't.
 731     if ( (method == wxX11_FS_WMSPEC) && !gtk_check_version(2,2,0) )
 732     {
 733         if (show)
 734             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 735         else
 736             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 737     }
 738     else
 739 #endif // GTK+ >= 2.2.0
 740     {
 741         GdkWindow *window = m_widget->window;
 742
 743         if (show)
 744         {
 745             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 746             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 747
 748             int screen_width,screen_height;
 749             wxDisplaySize( &screen_width, &screen_height );
 750
 751             gint client_x, client_y, root_x, root_y;
 752             gint width, height;
 753
 754             if (method != wxX11_FS_WMSPEC)
 755             {
 756                 // don't do it always, Metacity hates it
 757                 m_fsSaveGdkFunc = m_gdkFunc;
 758                 m_fsSaveGdkDecor = m_gdkDecor;
 759                 m_gdkFunc = m_gdkDecor = 0;
 760                 gdk_window_set_decorations(window, (GdkWMDecoration)0);
 761                 gdk_window_set_functions(window, (GdkWMFunction)0);
 762             }
 763
 764             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 765             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 766                          &width, &height, NULL);
 767
 768             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 769                         screen_width + 1, screen_height + 1);
 770
 771             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 772                                     (WXWindow)GDK_ROOT_WINDOW(),
 773                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 774                                     show, &m_fsSaveFrame, method);
 775         }
 776         else // hide
 777         {
 778             if (method != wxX11_FS_WMSPEC)
 779             {
 780                 // don't do it always, Metacity hates it
 781                 m_gdkFunc = m_fsSaveGdkFunc;
 782                 m_gdkDecor = m_fsSaveGdkDecor;
 783                 gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 784                 gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 785             }
 786
 787             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 788                                     (WXWindow)GDK_ROOT_WINDOW(),
 789                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 790                                     show, &m_fsSaveFrame, method);
 791
 792             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 793                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 794         }
 795     }
 796
 797     // documented behaviour is to show the window if it's still hidden when
 798     // showing it full screen
 799     if (show)
 800         Show();
 801
 802     return true;
 803 }
 804
 805 // ----------------------------------------------------------------------------
 806 // overridden wxWindow methods
 807 // ----------------------------------------------------------------------------
 808
 809 bool wxTopLevelWindowGTK::Show( bool show )
 810 {
 811     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 812
 813     if (show && !IsShown())
 814     {
 815         // size_allocate signals occur in reverse order (bottom to top).
 816         // Things work better if the initial wxSizeEvents are sent (from the
 817         // top down), before the initial size_allocate signals occur.
 818         wxSizeEvent event(GetSize(), GetId());
 819         event.SetEventObject(this);
 820         GetEventHandler()->ProcessEvent(event);
 821     }
 822
 823     bool change = wxTopLevelWindowBase::Show(show);
 824
 825     if (change && !show)
 826     {
 827         // make sure window has a non-default position, so when it is shown
 828         // again, it won't be repositioned by WM as if it were a new window
 829         // Note that this must be done _after_ the window is hidden.
 830         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 831     }
 832
 833     return change;
 834 }
 835
 836 void wxTopLevelWindowGTK::Raise()
 837 {
 838     gtk_window_present( GTK_WINDOW( m_widget ) );
 839 }
 840
 841 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 842 {
 843     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 844 }
 845
 846 // ----------------------------------------------------------------------------
 847 // window geometry
 848 // ----------------------------------------------------------------------------
 849
 850 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 851 {
 852     wxSize size(m_width, m_height);
 853     if (!IsFullScreen())
 854     {
 855         size -= GetDecorSize(m_gdkDecor);
 856         if (size.x < 0) size.x = 0;
 857         if (size.y < 0) size.y = 0;
 858     }
 859     if (width)  *width  = size.x;
 860     if (height) *height = size.y;
 861 }
 862
 863 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 864 {
 865     wxCHECK_RET( m_widget, wxT("invalid frame") );
 866
 867     // this shouldn't happen: wxFrame, wxMDIParentFrame and wxMDIChildFrame have m_wxwindow
 868     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid frame") );
 869
 870
 871     // deal with the position first
 872     int old_x = m_x;
 873     int old_y = m_y;
 874
 875     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 876     {
 877         // -1 means "use existing" unless the flag above is specified
 878         if ( x != -1 )
 879             m_x = x;
 880         if ( y != -1 )
 881             m_y = y;
 882     }
 883     else // wxSIZE_ALLOW_MINUS_ONE
 884     {
 885         m_x = x;
 886         m_y = y;
 887     }
 888
 889     if ( m_x != old_x || m_y != old_y )
 890     {
 891         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 892     }
 893
 894     const wxSize oldSize(m_width, m_height);
 895     if (width >= 0)
 896         m_width = width;
 897     if (height >= 0)
 898         m_height = height;
 899     ConstrainSize();
 900     if (m_width != oldSize.x || m_height != oldSize.y)
 901     {
 902         int w, h;
 903         GTKDoGetSize(&w, &h);
 904         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 905
 906         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 907         wxSizeEvent event(GetSize(), GetId());
 908         event.SetEventObject(this);
 909         GetEventHandler()->ProcessEvent(event);
 910     }
 911 }
 912
 913 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 914 {
 915     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 916
 917     if ( IsIconized() )
 918     {
 919         // for consistency with wxMSW, client area is supposed to be empty for
 920         // the iconized windows
 921         if ( width )
 922             *width = 0;
 923         if ( height )
 924             *height = 0;
 925     }
 926     else
 927     {
 928         GTKDoGetSize(width, height);
 929     }
 930 }
 931
 932 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 933                                           int maxW, int maxH,
 934                                           int incW, int incH )
 935 {
 936     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 937
 938     const wxSize minSize = GetMinSize();
 939     const wxSize maxSize = GetMaxSize();
 940     GdkGeometry hints;
 941     int hints_mask = 0;
 942     const wxSize sizeDecor = GetDecorSize(m_gdkDecor);
 943     if (minSize.x > 0 || minSize.y > 0)
 944     {
 945         hints_mask |= GDK_HINT_MIN_SIZE;
 946         hints.min_width = minSize.x - sizeDecor.x;
 947         if (hints.min_width < 0)
 948             hints.min_width = 0;
 949         hints.min_height = minSize.y - sizeDecor.y;
 950         if (hints.min_height < 0)
 951             hints.min_height = 0;
 952     }
 953     if (maxSize.x > 0 || maxSize.y > 0)
 954     {
 955         hints_mask |= GDK_HINT_MAX_SIZE;
 956         hints.max_width = maxSize.x - sizeDecor.x;
 957         if (hints.max_width < 0)
 958             hints.max_width = INT_MAX;
 959         hints.max_height = maxSize.y - sizeDecor.y;
 960         if (hints.max_height < 0)
 961             hints.max_height = INT_MAX;
 962     }
 963     if (incW > 0 || incH > 0)
 964     {
 965         hints_mask |= GDK_HINT_RESIZE_INC;
 966         hints.width_inc  = incW > 0 ? incW : 1;
 967         hints.height_inc = incH > 0 ? incH : 1;
 968     }
 969     gtk_window_set_geometry_hints(
 970         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
 971 }
 972
 973 bool wxTopLevelWindowGTK::IsDecorCacheable() const
 974 {
 975     return true;
 976 }
 977
 978 void wxTopLevelWindowGTK::OnInternalIdle()
 979 {
 980     // set the focus if not done yet and if we can already do it
 981     if ( GTK_WIDGET_REALIZED(m_wxwindow) )
 982     {
 983         if ( g_delayedFocus &&
 984              wxGetTopLevelParent((wxWindow*)g_delayedFocus) == this )
 985         {
 986             wxLogTrace(_T("focus"),
 987                        _T("Setting focus from wxTLW::OnIdle() to %s(%s)"),
 988                        g_delayedFocus->GetClassInfo()->GetClassName(),
 989                        g_delayedFocus->GetLabel().c_str());
 990
 991             g_delayedFocus->SetFocus();
 992             g_delayedFocus = NULL;
 993         }
 994     }
 995
 996     wxWindow::OnInternalIdle();
 997
 998     // Synthetize activate events.
 999     if ( g_sendActivateEvent != -1 )
1000     {
1001         bool activate = g_sendActivateEvent != 0;
1002
1003         // if (!activate) wxPrintf( wxT("de") );
1004         // wxPrintf( wxT("activate\n") );
1005
1006         // do it only once
1007         g_sendActivateEvent = -1;
1008
1009         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1010     }
1011 }
1012
1013 // ----------------------------------------------------------------------------
1014 // frame title/icon
1015 // ----------------------------------------------------------------------------
1016
1017 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1018 {
1019     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1020
1021     if ( title == m_title )
1022         return;
1023
1024     m_title = title;
1025
1026     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1027 }
1028
1029 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1030 {
1031     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1032
1033     wxTopLevelWindowBase::SetIcons( icons );
1034
1035     GList *list = NULL;
1036
1037     const size_t numIcons = icons.GetIconCount();
1038     for ( size_t i = 0; i < numIcons; i++ )
1039     {
1040         list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1041     }
1042
1043     gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1044     g_list_free(list);
1045 }
1046
1047 // ----------------------------------------------------------------------------
1048 // frame state: maximized/iconized/normal
1049 // ----------------------------------------------------------------------------
1050
1051 void wxTopLevelWindowGTK::Maximize(bool maximize)
1052 {
1053     if (maximize)
1054         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1055     else
1056         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1057 }
1058
1059 bool wxTopLevelWindowGTK::IsMaximized() const
1060 {
1061     if(!m_widget->window)
1062         return false;
1063
1064     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1065 }
1066
1067 void wxTopLevelWindowGTK::Restore()
1068 {
1069     // "Present" seems similar enough to "restore"
1070     gtk_window_present( GTK_WINDOW( m_widget ) );
1071 }
1072
1073 void wxTopLevelWindowGTK::Iconize( bool iconize )
1074 {
1075     if (iconize)
1076         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1077     else
1078         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1079 }
1080
1081 bool wxTopLevelWindowGTK::IsIconized() const
1082 {
1083     return m_isIconized;
1084 }
1085
1086 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1087 {
1088     if ( iconize != m_isIconized )
1089     {
1090         m_isIconized = iconize;
1091         (void)SendIconizeEvent(iconize);
1092     }
1093 }
1094
1095 void wxTopLevelWindowGTK::AddGrab()
1096 {
1097     if (!m_grabbed)
1098     {
1099         m_grabbed = true;
1100         gtk_grab_add( m_widget );
1101         wxGUIEventLoop().Run();
1102         gtk_grab_remove( m_widget );
1103     }
1104 }
1105
1106 void wxTopLevelWindowGTK::RemoveGrab()
1107 {
1108     if (m_grabbed)
1109     {
1110         gtk_main_quit();
1111         m_grabbed = false;
1112     }
1113 }
1114
1115
1116 // helper
1117 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1118 {
1119     if (window)
1120     {
1121         if (region.IsEmpty())
1122         {
1123             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1124         }
1125         else
1126         {
1127             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1128             return true;
1129         }
1130     }
1131     return false;
1132 }
1133
1134
1135 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1136 {
1137     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1138                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1139
1140     GdkWindow *window = NULL;
1141     if (m_wxwindow)
1142     {
1143         window = GTK_PIZZA(m_wxwindow)->bin_window;
1144         do_shape_combine_region(window, region);
1145     }
1146     window = m_widget->window;
1147     return do_shape_combine_region(window, region);
1148 }
1149
1150 bool wxTopLevelWindowGTK::IsActive()
1151 {
1152     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1153 }
1154
1155 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1156 {
1157     bool new_hint_value = false;
1158
1159     // FIXME: This is a workaround to focus handling problem
1160     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1161     // yet been processed, and the internal focus system is not up to date yet.
1162     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1163     ::wxYieldIfNeeded();
1164
1165     if(m_urgency_hint >= 0)
1166         g_source_remove(m_urgency_hint);
1167
1168     m_urgency_hint = -2;
1169
1170     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1171     {
1172         new_hint_value = true;
1173
1174         if (flags & wxUSER_ATTENTION_INFO)
1175         {
1176             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1177         } else {
1178             m_urgency_hint = -1;
1179         }
1180     }
1181
1182 #if GTK_CHECK_VERSION(2,7,0)
1183     if(!gtk_check_version(2,7,0))
1184         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1185     else
1186 #endif
1187         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1188 }
1189
1190 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1191 {
1192 #if defined(__WXGTK24__) || GTK_CHECK_VERSION(2,2,0)
1193     // Store which styles were changed
1194     long styleChanges = style ^ m_windowStyle;
1195 #endif
1196
1197     // Process wxWindow styles. This also updates the internal variable
1198     // Therefore m_windowStyle bits carry now the _new_ style values
1199     wxWindow::SetWindowStyleFlag(style);
1200
1201     // just return for now if widget does not exist yet
1202     if (!m_widget)
1203         return;
1204
1205 #ifdef __WXGTK24__
1206     if ( (styleChanges & wxSTAY_ON_TOP) && !gtk_check_version(2,4,0) )
1207         gtk_window_set_keep_above(GTK_WINDOW(m_widget), m_windowStyle & wxSTAY_ON_TOP);
1208 #endif // GTK+ 2.4
1209 #if GTK_CHECK_VERSION(2,2,0)
1210     if ( (styleChanges & wxFRAME_NO_TASKBAR) && !gtk_check_version(2,2,0) )
1211     {
1212         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), m_windowStyle & wxFRAME_NO_TASKBAR);
1213     }
1214 #endif // GTK+ 2.2
1215 }
1216
1217 /* Get the X Window between child and the root window.
1218    This should usually be the WM managed XID */
1219 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1220 {
1221     Window root, parent;
1222     Window* children;
1223     unsigned int nchildren;
1224
1225     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1226     XFree(children);
1227
1228     while (parent != root) {
1229         child = parent;
1230         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1231         XFree(children);
1232     }
1233
1234     return child;
1235 }
1236
1237 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1238 {
1239     if (!m_widget || !m_widget->window)
1240         return false;
1241
1242     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1243     // We need to get the X Window that has the root window as the immediate parent
1244     // and m_widget->window as a child. This should be the X Window that the WM manages and
1245     // from which the opacity property is checked from.
1246     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1247
1248
1249     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1250     if (alpha == 0xff)
1251         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1252     else
1253     {
1254         long opacity = alpha * 0x1010101L;
1255         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1256                         XA_CARDINAL, 32, PropModeReplace,
1257                         (unsigned char *) &opacity, 1L);
1258     }
1259     XSync(dpy, False);
1260     return true;
1261 }
1262
1263 bool wxTopLevelWindowGTK::CanSetTransparent()
1264 {
1265     // allow to override automatic detection as it's far from perfect
1266     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1267     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1268     {
1269         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1270     }
1271
1272 #if GTK_CHECK_VERSION(2,10,0)
1273     if (!gtk_check_version(2,10,0))
1274     {
1275         return (gtk_widget_is_composited (m_widget));
1276     }
1277     else
1278 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1279     {
1280         return false;
1281     }
1282
1283 #if 0 // Don't be optimistic here for the sake of wxAUI
1284     int opcode, event, error;
1285     // Check for the existence of a RGBA visual instead?
1286     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1287                            "Composite", &opcode, &event, &error);
1288 #endif
1289 }
1290
1291 void wxTopLevelWindowGTK::OnSysColourChanged(wxSysColourChangedEvent& event)
1292 {
1293     // We don't know the order in which top-level windows will
1294     // be notified, so we need to clear the system objects
1295     // for each top-level window.
1296     extern void wxClearGtkSystemObjects();
1297     wxClearGtkSystemObjects();
1298
1299     // wxWindowBase::OnSysColourChanged will propagate event
1300     // to children
1301     event.Skip();
1302 }