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