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