src/gtk/toplevel.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/toplevel.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 #ifdef __VMS
  22 #define XIconifyWindow XICONIFYWINDOW
  23 #endif
  24
  25 #include "wx/toplevel.h"
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/frame.h"
  29     #include "wx/icon.h"
  30     #include "wx/log.h"
  31     #include "wx/app.h"
  32 #endif
  33
  34 #include "wx/gtk/private.h"
  35 #include "wx/evtloop.h"
  36 #include "wx/sysopt.h"
  37
  38 #include <gtk/gtk.h>
  39 #include <gdk/gdkx.h>
  40
  41 #include "wx/gtk/private/win_gtk.h"
  42
  43 #include "wx/unix/utilsx11.h"
  44
  45 // XA_CARDINAL
  46 #include <X11/Xatom.h>
  47
  48 #if wxUSE_LIBHILDON
  49     #include <hildon-widgets/hildon-program.h>
  50     #include <hildon-widgets/hildon-window.h>
  51 #endif // wxUSE_LIBHILDON
  52
  53 // ----------------------------------------------------------------------------
  54 // data
  55 // ----------------------------------------------------------------------------
  56
  57 // this is incremented while a modal dialog is shown
  58 int wxOpenModalDialogsCount = 0;
  59
  60 // the frame that is currently active (i.e. its child has focus). It is
  61 // used to generate wxActivateEvents
  62 static wxTopLevelWindowGTK *g_activeFrame = (wxTopLevelWindowGTK*) NULL;
  63 static wxTopLevelWindowGTK *g_lastActiveFrame = (wxTopLevelWindowGTK*) NULL;
  64
  65 // if we detect that the app has got/lost the focus, we set this variable to
  66 // either TRUE or FALSE and an activate event will be sent during the next
  67 // OnIdle() call and it is reset to -1: this value means that we shouldn't
  68 // send any activate events at all
  69 static int g_sendActivateEvent = -1;
  70
  71 //-----------------------------------------------------------------------------
  72 // RequestUserAttention related functions
  73 //-----------------------------------------------------------------------------
  74
  75 extern "C" {
  76 static void wxgtk_window_set_urgency_hint (GtkWindow *win,
  77                                            gboolean setting)
  78 {
  79     wxASSERT_MSG( GTK_WIDGET_REALIZED(win), wxT("wxgtk_window_set_urgency_hint: GdkWindow not realized") );
  80     GdkWindow *window = GTK_WIDGET(win)->window;
  81     XWMHints *wm_hints;
  82
  83     wm_hints = XGetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window));
  84
  85     if (!wm_hints)
  86         wm_hints = XAllocWMHints();
  87
  88     if (setting)
  89         wm_hints->flags |= XUrgencyHint;
  90     else
  91         wm_hints->flags &= ~XUrgencyHint;
  92
  93     XSetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window), wm_hints);
  94     XFree(wm_hints);
  95 }
  96
  97 static gboolean gtk_frame_urgency_timer_callback( wxTopLevelWindowGTK *win )
  98 {
  99 #if GTK_CHECK_VERSION(2,7,0)
 100     if(!gtk_check_version(2,7,0))
 101         gtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 102     else
 103 #endif
 104         wxgtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 105
 106     win->m_urgency_hint = -2;
 107     return FALSE;
 108 }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 // "focus_in_event"
 113 //-----------------------------------------------------------------------------
 114
 115 extern "C" {
 116 static gboolean gtk_frame_focus_in_callback( GtkWidget *widget,
 117                                          GdkEvent *WXUNUSED(event),
 118                                          wxTopLevelWindowGTK *win )
 119 {
 120     switch ( g_sendActivateEvent )
 121     {
 122         case -1:
 123             // we've got focus from outside, synthetize wxActivateEvent
 124             g_sendActivateEvent = 1;
 125             break;
 126
 127         case 0:
 128             // another our window just lost focus, it was already ours before
 129             // - don't send any wxActivateEvent
 130             g_sendActivateEvent = -1;
 131             break;
 132     }
 133
 134     g_activeFrame = win;
 135     g_lastActiveFrame = g_activeFrame;
 136
 137     // wxPrintf( wxT("active: %s\n"), win->GetTitle().c_str() );
 138
 139     // MR: wxRequestUserAttention related block
 140     switch( win->m_urgency_hint )
 141     {
 142         default:
 143             g_source_remove( win->m_urgency_hint );
 144             // no break, fallthrough to remove hint too
 145         case -1:
 146 #if GTK_CHECK_VERSION(2,7,0)
 147             if(!gtk_check_version(2,7,0))
 148                 gtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 149             else
 150 #endif
 151             {
 152                 wxgtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 153             }
 154
 155             win->m_urgency_hint = -2;
 156             break;
 157
 158         case -2: break;
 159     }
 160
 161     wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 162     wxActivateEvent event(wxEVT_ACTIVATE, true, g_activeFrame->GetId());
 163     event.SetEventObject(g_activeFrame);
 164     g_activeFrame->HandleWindowEvent(event);
 165
 166     return FALSE;
 167 }
 168 }
 169
 170 //-----------------------------------------------------------------------------
 171 // "focus_out_event"
 172 //-----------------------------------------------------------------------------
 173
 174 extern "C" {
 175 static
 176 gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
 177                                       GdkEventFocus *WXUNUSED(gdk_event),
 178                                       wxTopLevelWindowGTK * WXUNUSED(win))
 179 {
 180     // if the focus goes out of our app alltogether, OnIdle() will send
 181     // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
 182     // g_sendActivateEvent to -1
 183     g_sendActivateEvent = 0;
 184
 185     // wxASSERT_MSG( (g_activeFrame == win), wxT("TLW deactivatd although it wasn't active") );
 186
 187     // wxPrintf( wxT("inactive: %s\n"), win->GetTitle().c_str() );
 188
 189     if (g_activeFrame)
 190     {
 191         wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 192         wxActivateEvent event(wxEVT_ACTIVATE, false, g_activeFrame->GetId());
 193         event.SetEventObject(g_activeFrame);
 194         g_activeFrame->HandleWindowEvent(event);
 195
 196         g_activeFrame = NULL;
 197     }
 198
 199     return FALSE;
 200 }
 201 }
 202
 203 //-----------------------------------------------------------------------------
 204 // "size_allocate" from m_wxwindow
 205 //-----------------------------------------------------------------------------
 206
 207 extern "C" {
 208 static void
 209 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
 210 {
 211     if (win->m_oldClientWidth  != alloc->width ||
 212         win->m_oldClientHeight != alloc->height)
 213     {
 214         win->m_oldClientWidth  = alloc->width;
 215         win->m_oldClientHeight = alloc->height;
 216
 217         wxSize size(win->m_widget->allocation.width,
 218                     win->m_widget->allocation.height);
 219         size += win->m_decorSize;
 220         win->m_width  = size.x;
 221         win->m_height = size.y;
 222
 223         if (!win->IsIconized())
 224         {
 225             wxSizeEvent event(size, win->GetId());
 226             event.SetEventObject(win);
 227             win->HandleWindowEvent(event);
 228         }
 229         // else the window is currently unmapped, don't generate size events
 230     }
 231 }
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // "size_request"
 236 // ----------------------------------------------------------------------------
 237
 238 extern "C" {
 239 static
 240 void wxgtk_tlw_size_request_callback(GtkWidget * WXUNUSED(widget),
 241                                      GtkRequisition *requisition,
 242                                      wxTopLevelWindowGTK *win)
 243 {
 244     // we must return the size of the window without WM decorations, otherwise
 245     // GTK+ gets confused, so don't call just GetSize() here
 246     win->GTKDoGetSize(&requisition->width, &requisition->height);
 247 }
 248 }
 249
 250 //-----------------------------------------------------------------------------
 251 // "delete_event"
 252 //-----------------------------------------------------------------------------
 253
 254 extern "C" {
 255 static gboolean
 256 gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
 257                            GdkEvent *WXUNUSED(event),
 258                            wxTopLevelWindowGTK *win )
 259 {
 260     if (win->IsEnabled() &&
 261         (wxOpenModalDialogsCount == 0 || (win->GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) ||
 262          win->IsGrabbed()))
 263         win->Close();
 264
 265     return TRUE;
 266 }
 267 }
 268
 269 //-----------------------------------------------------------------------------
 270 // "configure_event"
 271 //-----------------------------------------------------------------------------
 272
 273 extern "C" {
 274 static gboolean
 275 gtk_frame_configure_callback( GtkWidget* widget,
 276                               GdkEventConfigure *WXUNUSED(event),
 277                               wxTopLevelWindowGTK *win )
 278 {
 279     if (!win->m_hasVMT || !win->IsShown())
 280         return FALSE;
 281
 282     wxPoint point;
 283     gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
 284
 285     win->m_x = point.x;
 286     win->m_y = point.y;
 287     wxMoveEvent mevent(point, win->GetId());
 288     mevent.SetEventObject( win );
 289     win->HandleWindowEvent( mevent );
 290
 291     return FALSE;
 292 }
 293 }
 294
 295 //-----------------------------------------------------------------------------
 296 // "realize" from m_widget
 297 //-----------------------------------------------------------------------------
 298
 299 // we cannot MWM hints and icons before the widget has been realized,
 300 // so we do this directly after realization
 301
 302 extern "C" {
 303 static void
 304 gtk_frame_realized_callback( GtkWidget * WXUNUSED(widget),
 305                              wxTopLevelWindowGTK *win )
 306 {
 307     // All this is for Motif Window Manager "hints" and is supposed to be
 308     // recognized by other WM as well. Not tested.
 309     gdk_window_set_decorations(win->m_widget->window,
 310                                (GdkWMDecoration)win->m_gdkDecor);
 311     gdk_window_set_functions(win->m_widget->window,
 312                                (GdkWMFunction)win->m_gdkFunc);
 313
 314     // GTK's shrinking/growing policy
 315     if ((win->m_gdkFunc & GDK_FUNC_RESIZE) == 0)
 316         gtk_window_set_resizable(GTK_WINDOW(win->m_widget), FALSE);
 317     else
 318         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 319
 320     const wxIconBundle& icons = win->GetIcons();
 321     if (icons.GetIconCount())
 322         win->SetIcons(icons);
 323
 324     if (win->HasFlag(wxFRAME_SHAPED))
 325         win->SetShape(win->m_shape); // it will really set the window shape now
 326 }
 327 }
 328
 329 //-----------------------------------------------------------------------------
 330 // "map_event" from m_widget
 331 //-----------------------------------------------------------------------------
 332
 333 extern "C" {
 334 static gboolean
 335 gtk_frame_map_callback( GtkWidget*,
 336                         GdkEvent * WXUNUSED(event),
 337                         wxTopLevelWindow *win )
 338 {
 339     const bool wasIconized = win->IsIconized();
 340
 341     win->SetIconizeState(false);
 342
 343     if (wasIconized)
 344     {
 345         // Because GetClientSize() returns (0,0) when IsIconized() is true,
 346         // a size event must be generated, just in case GetClientSize() was
 347         // called while iconized. This specifically happens when restoring a
 348         // tlw that was "rolled up" with some WMs.
 349         // Queue a resize rather than sending size event directly to allow
 350         // children to be made visible first.
 351         win->m_oldClientWidth = 0;
 352         gtk_widget_queue_resize(win->m_wxwindow);
 353     }
 354
 355     return false;
 356 }
 357 }
 358
 359 //-----------------------------------------------------------------------------
 360 // "unmap_event" from m_widget
 361 //-----------------------------------------------------------------------------
 362
 363 extern "C" {
 364 static gboolean
 365 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
 366                           GdkEvent * WXUNUSED(event),
 367                           wxTopLevelWindow *win )
 368 {
 369     win->SetIconizeState(true);
 370     return false;
 371 }
 372 }
 373
 374 //-----------------------------------------------------------------------------
 375
 376 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
 377 {
 378     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 379     Atom xproperty = gdk_x11_atom_to_xatom_for_display(
 380                         gdk_drawable_get_display(window), property);
 381     Atom type;
 382     int format;
 383     gulong nitems, bytes_after;
 384     guchar* data;
 385     Status status = XGetWindowProperty(
 386         gdk_x11_drawable_get_xdisplay(window),
 387         gdk_x11_drawable_get_xid(window),
 388         xproperty,
 389         0, 4, false, XA_CARDINAL,
 390         &type, &format, &nitems, &bytes_after, &data);
 391     const bool success = status == Success && data && nitems == 4;
 392     if (success)
 393     {
 394         long* p = (long*)data;
 395         if (left)   *left   = int(p[0]);
 396         if (right)  *right  = int(p[1]);
 397         if (top)    *top    = int(p[2]);
 398         if (bottom) *bottom = int(p[3]);
 399     }
 400     if (data)
 401         XFree(data);
 402     return success;
 403 }
 404
 405 //-----------------------------------------------------------------------------
 406 // "property_notify_event" from m_widget
 407 //-----------------------------------------------------------------------------
 408
 409 extern "C" {
 410 static gboolean property_notify_event(
 411     GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
 412 {
 413     // Watch for changes to _NET_FRAME_EXTENTS property
 414     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 415     if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property)
 416     {
 417         int left, right, top, bottom;
 418         if (wxGetFrameExtents(event->window, &left, &right, &top, &bottom))
 419         {
 420             const wxSize decorSize =
 421                 wxSize(left + right, top + bottom);
 422             win->GTKUpdateDecorSize(decorSize);
 423         }
 424     }
 425     return false;
 426 }
 427 }
 428
 429 BEGIN_EVENT_TABLE(wxTopLevelWindowGTK, wxTopLevelWindowBase)
 430     EVT_SYS_COLOUR_CHANGED(wxTopLevelWindowGTK::OnSysColourChanged)
 431 END_EVENT_TABLE()
 432
 433 // ----------------------------------------------------------------------------
 434 // wxTopLevelWindowGTK creation
 435 // ----------------------------------------------------------------------------
 436
 437 void wxTopLevelWindowGTK::Init()
 438 {
 439     m_mainWidget = (GtkWidget*) NULL;
 440     m_isIconized = false;
 441     m_fsIsShowing = false;
 442     m_themeEnabled = true;
 443     m_gdkDecor = m_gdkFunc = 0;
 444     m_grabbed = false;
 445     m_deferShow = true;
 446
 447     m_urgency_hint = -2;
 448 }
 449
 450 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 451                                   wxWindowID id,
 452                                   const wxString& title,
 453                                   const wxPoint& pos,
 454                                   const wxSize& sizeOrig,
 455                                   long style,
 456                                   const wxString &name )
 457 {
 458     // always create a frame of some reasonable, even if arbitrary, size (at
 459     // least for MSW compatibility)
 460     wxSize size = sizeOrig;
 461     size.x = WidthDefault(size.x);
 462     size.y = HeightDefault(size.y);
 463
 464     wxTopLevelWindows.Append( this );
 465
 466     if (!PreCreation( parent, pos, size ) ||
 467         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 468     {
 469         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 470         return false;
 471     }
 472
 473     m_title = title;
 474
 475     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 476     //     e.g. in wxTaskBarIconAreaGTK
 477     if (m_widget == NULL)
 478     {
 479 #if wxUSE_LIBHILDON
 480         // we must create HildonWindow and not a normal GtkWindow as the latter
 481         // doesn't look correctly in Maemo environment and it must also be
 482         // registered with the main program object
 483         m_widget = hildon_window_new();
 484         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 485                                   HILDON_WINDOW(m_widget));
 486 #else // !wxUSE_LIBHILDON
 487         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 488         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 489         {
 490             // Tell WM that this is a dialog window and make it center
 491             // on parent by default (this is what GtkDialog ctor does):
 492             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 493                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 494             gtk_window_set_position(GTK_WINDOW(m_widget),
 495                                     GTK_WIN_POS_CENTER_ON_PARENT);
 496         }
 497         else
 498         {
 499             if (style & wxFRAME_TOOL_WINDOW)
 500             {
 501                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 502                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 503
 504                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 505                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 506                 // For consistency between WMs and with Windows, we
 507                 // should set the NO_TASKBAR flag which will apply
 508                 // the set_skip_taskbar_hint if it is available,
 509                 // ensuring no taskbar entry will appear.
 510                 style |= wxFRAME_NO_TASKBAR;
 511             }
 512         }
 513 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 514     }
 515
 516     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 517     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 518                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 519                        (style & wxFRAME_FLOAT_ON_PARENT)))
 520     {
 521         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 522                                       GTK_WINDOW(topParent->m_widget) );
 523     }
 524
 525     if (style & wxFRAME_NO_TASKBAR)
 526     {
 527         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 528     }
 529
 530     if (style & wxSTAY_ON_TOP)
 531     {
 532         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 533     }
 534
 535 #if 0
 536     if (!name.empty())
 537         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 538 #endif
 539
 540     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 541     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 542
 543     g_signal_connect (m_widget, "delete_event",
 544                       G_CALLBACK (gtk_frame_delete_callback), this);
 545
 546     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 547     m_mainWidget = gtk_vbox_new(false, 0);
 548     gtk_widget_show( m_mainWidget );
 549     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 550     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 551
 552     // m_wxwindow is the client area
 553     m_wxwindow = wxPizza::New();
 554     gtk_widget_show( m_wxwindow );
 555     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 556
 557     // we donm't allow the frame to get the focus as otherwise
 558     // the frame will grab it at arbitrary focus changes
 559     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 560
 561     if (m_parent) m_parent->AddChild( this );
 562
 563     g_signal_connect(m_wxwindow, "size_allocate",
 564         G_CALLBACK(size_allocate), this);
 565
 566     g_signal_connect (m_widget, "size_request",
 567                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 568     PostCreation();
 569
 570     if ((m_x != -1) || (m_y != -1))
 571         gtk_widget_set_uposition( m_widget, m_x, m_y );
 572
 573     //  we cannot set MWM hints and icons before the widget has
 574     //  been realized, so we do this directly after realization
 575     g_signal_connect (m_widget, "realize",
 576                       G_CALLBACK (gtk_frame_realized_callback), this);
 577
 578     // map and unmap for iconized state
 579     g_signal_connect (m_widget, "map_event",
 580                       G_CALLBACK (gtk_frame_map_callback), this);
 581     g_signal_connect (m_widget, "unmap_event",
 582                       G_CALLBACK (gtk_frame_unmap_callback), this);
 583
 584     // for wxMoveEvent
 585     g_signal_connect (m_widget, "configure_event",
 586                       G_CALLBACK (gtk_frame_configure_callback), this);
 587
 588     // activation
 589     g_signal_connect_after (m_widget, "focus_in_event",
 590                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 591     g_signal_connect_after (m_widget, "focus_out_event",
 592                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 593
 594     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 595     g_signal_connect(m_widget, "property_notify_event",
 596         G_CALLBACK(property_notify_event), this);
 597
 598     // decorations
 599     if ((style & wxSIMPLE_BORDER) || (style & wxNO_BORDER))
 600     {
 601         m_gdkDecor = 0;
 602         m_gdkFunc = 0;
 603     }
 604     else
 605     {
 606         m_gdkDecor = GDK_DECOR_BORDER;
 607         m_gdkFunc = GDK_FUNC_MOVE;
 608
 609         // All this is for Motif Window Manager "hints" and is supposed to be
 610         // recognized by other WMs as well.
 611         if ((style & wxCAPTION) != 0)
 612         {
 613             m_gdkDecor |= GDK_DECOR_TITLE;
 614         }
 615         if ((style & wxCLOSE_BOX) != 0)
 616         {
 617             m_gdkFunc |= GDK_FUNC_CLOSE;
 618         }
 619         if ((style & wxSYSTEM_MENU) != 0)
 620         {
 621             m_gdkDecor |= GDK_DECOR_MENU;
 622         }
 623         if ((style & wxMINIMIZE_BOX) != 0)
 624         {
 625             m_gdkFunc |= GDK_FUNC_MINIMIZE;
 626             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 627         }
 628         if ((style & wxMAXIMIZE_BOX) != 0)
 629         {
 630             m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 631             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 632         }
 633         if ((style & wxRESIZE_BORDER) != 0)
 634         {
 635            m_gdkFunc |= GDK_FUNC_RESIZE;
 636            m_gdkDecor |= GDK_DECOR_RESIZEH;
 637         }
 638     }
 639
 640     m_decorSize = GetCachedDecorSize();
 641     int w, h;
 642     GTKDoGetSize(&w, &h);
 643     gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
 644
 645     return true;
 646 }
 647
 648 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 649 {
 650 #if wxUSE_LIBHILDON
 651     // it can also be a (standard) dialog
 652     if ( HILDON_IS_WINDOW(m_widget) )
 653     {
 654         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 655                                      HILDON_WINDOW(m_widget));
 656     }
 657 #endif // wxUSE_LIBHILDON
 658
 659     if (m_grabbed)
 660     {
 661         wxFAIL_MSG(_T("Window still grabbed"));
 662         RemoveGrab();
 663     }
 664
 665     m_isBeingDeleted = true;
 666
 667     // it may also be GtkScrolledWindow in the case of an MDI child
 668     if (GTK_IS_WINDOW(m_widget))
 669     {
 670         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 671     }
 672
 673     if (g_activeFrame == this)
 674         g_activeFrame = NULL;
 675     if (g_lastActiveFrame == this)
 676         g_lastActiveFrame = NULL;
 677 }
 678
 679 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 680 {
 681     if (enable)
 682         m_gdkFunc |= GDK_FUNC_CLOSE;
 683     else
 684         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 685
 686     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 687         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 688
 689     return true;
 690 }
 691
 692 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 693 {
 694     if (show == m_fsIsShowing)
 695         return false; // return what?
 696
 697     m_fsIsShowing = show;
 698
 699     wxX11FullScreenMethod method =
 700         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 701                                  (WXWindow)GDK_ROOT_WINDOW());
 702
 703     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 704     //     to switch to fullscreen, which is not always available. We must
 705     //     check if WM supports the spec and use legacy methods if it
 706     //     doesn't.
 707     if ( method == wxX11_FS_WMSPEC )
 708     {
 709         if (show)
 710             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 711         else
 712             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 713     }
 714     else
 715     {
 716         GdkWindow *window = m_widget->window;
 717
 718         if (show)
 719         {
 720             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 721             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 722
 723             int screen_width,screen_height;
 724             wxDisplaySize( &screen_width, &screen_height );
 725
 726             gint client_x, client_y, root_x, root_y;
 727             gint width, height;
 728
 729             m_fsSaveGdkFunc = m_gdkFunc;
 730             m_fsSaveGdkDecor = m_gdkDecor;
 731             m_gdkFunc = m_gdkDecor = 0;
 732             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 733             gdk_window_set_functions(window, (GdkWMFunction)0);
 734
 735             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 736             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 737                          &width, &height, NULL);
 738
 739             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 740                         screen_width + 1, screen_height + 1);
 741
 742             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 743                                     (WXWindow)GDK_ROOT_WINDOW(),
 744                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 745                                     show, &m_fsSaveFrame, method);
 746         }
 747         else // hide
 748         {
 749             m_gdkFunc = m_fsSaveGdkFunc;
 750             m_gdkDecor = m_fsSaveGdkDecor;
 751             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 752             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 753
 754             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 755                                     (WXWindow)GDK_ROOT_WINDOW(),
 756                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 757                                     show, &m_fsSaveFrame, method);
 758
 759             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 760                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 761         }
 762     }
 763
 764     // documented behaviour is to show the window if it's still hidden when
 765     // showing it full screen
 766     if (show)
 767         Show();
 768
 769     return true;
 770 }
 771
 772 // ----------------------------------------------------------------------------
 773 // overridden wxWindow methods
 774 // ----------------------------------------------------------------------------
 775
 776 bool wxTopLevelWindowGTK::Show( bool show )
 777 {
 778     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 779
 780     bool deferShow = show && m_deferShow && !m_isShown;
 781     if (deferShow)
 782     {
 783         m_deferShow =
 784         deferShow = !GTK_WIDGET_REALIZED(m_widget) &&
 785             gdk_x11_screen_supports_net_wm_hint(
 786                 gtk_widget_get_screen(m_widget),
 787                 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)) &&
 788             g_signal_handler_find(m_widget,
 789                 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 790                 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
 791                 0, NULL, NULL, this);
 792     }
 793     if (deferShow)
 794     {
 795         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 796         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 797         // notification is received, so correct frame extents are known.
 798         // This allows resizing m_widget to keep the overall size in sync with
 799         // what wxWidgets expects it to be without an obvious change in the
 800         // window size immediately after it becomes visible.
 801
 802         // Realize m_widget, so m_widget->window can be used. Realizing normally
 803         // causes the widget tree to be size_allocated, which generates size
 804         // events in the wrong order. However, the size_allocates will not be
 805         // done if the allocation is not the default (1,1).
 806         const int alloc_width = m_widget->allocation.width;
 807         if (alloc_width == 1)
 808             m_widget->allocation.width = 2;
 809         gtk_widget_realize(m_widget);
 810         if (alloc_width == 1)
 811             m_widget->allocation.width = 1;
 812
 813         // send _NET_REQUEST_FRAME_EXTENTS
 814         XClientMessageEvent xevent;
 815         memset(&xevent, 0, sizeof(xevent));
 816         xevent.type = ClientMessage;
 817         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 818         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 819             gdk_drawable_get_display(m_widget->window),
 820             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 821         xevent.format = 32;
 822         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 823         XSendEvent(display, DefaultRootWindow(display), false,
 824             SubstructureNotifyMask | SubstructureRedirectMask,
 825             (XEvent*)&xevent);
 826
 827         // defer calling gtk_widget_show()
 828         m_isShown = true;
 829         return true;
 830     }
 831
 832     if (show && !GTK_WIDGET_REALIZED(m_widget))
 833     {
 834         // size_allocate signals occur in reverse order (bottom to top).
 835         // Things work better if the initial wxSizeEvents are sent (from the
 836         // top down), before the initial size_allocate signals occur.
 837         wxSizeEvent event(GetSize(), GetId());
 838         event.SetEventObject(this);
 839         HandleWindowEvent(event);
 840     }
 841
 842     bool change = wxTopLevelWindowBase::Show(show);
 843
 844     if (change && !show)
 845     {
 846         // make sure window has a non-default position, so when it is shown
 847         // again, it won't be repositioned by WM as if it were a new window
 848         // Note that this must be done _after_ the window is hidden.
 849         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 850     }
 851
 852     return change;
 853 }
 854
 855 void wxTopLevelWindowGTK::Raise()
 856 {
 857     gtk_window_present( GTK_WINDOW( m_widget ) );
 858 }
 859
 860 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 861 {
 862     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 863 }
 864
 865 // ----------------------------------------------------------------------------
 866 // window geometry
 867 // ----------------------------------------------------------------------------
 868
 869 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 870 {
 871     wxSize size(m_width, m_height);
 872     size -= m_decorSize;
 873     if (size.x < 0) size.x = 0;
 874     if (size.y < 0) size.y = 0;
 875     if (width)  *width  = size.x;
 876     if (height) *height = size.y;
 877 }
 878
 879 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 880 {
 881     wxCHECK_RET( m_widget, wxT("invalid frame") );
 882
 883     // deal with the position first
 884     int old_x = m_x;
 885     int old_y = m_y;
 886
 887     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 888     {
 889         // -1 means "use existing" unless the flag above is specified
 890         if ( x != -1 )
 891             m_x = x;
 892         if ( y != -1 )
 893             m_y = y;
 894     }
 895     else // wxSIZE_ALLOW_MINUS_ONE
 896     {
 897         m_x = x;
 898         m_y = y;
 899     }
 900
 901     if ( m_x != old_x || m_y != old_y )
 902     {
 903         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 904     }
 905
 906     const wxSize oldSize(m_width, m_height);
 907     if (width >= 0)
 908         m_width = width;
 909     if (height >= 0)
 910         m_height = height;
 911     ConstrainSize();
 912     if (m_width != oldSize.x || m_height != oldSize.y)
 913     {
 914         int w, h;
 915         GTKDoGetSize(&w, &h);
 916         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 917
 918         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 919         wxSizeEvent event(GetSize(), GetId());
 920         event.SetEventObject(this);
 921         HandleWindowEvent(event);
 922     }
 923 }
 924
 925 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 926 {
 927     if (m_deferShow && !m_isShown)
 928         // Since client size is being explicitly set, don't change it later
 929         m_deferShow = false;
 930     wxTopLevelWindowBase::DoSetClientSize(width, height);
 931 }
 932
 933 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 934 {
 935     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 936
 937     if ( IsIconized() )
 938     {
 939         // for consistency with wxMSW, client area is supposed to be empty for
 940         // the iconized windows
 941         if ( width )
 942             *width = 0;
 943         if ( height )
 944             *height = 0;
 945     }
 946     else
 947     {
 948         GTKDoGetSize(width, height);
 949     }
 950 }
 951
 952 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 953                                           int maxW, int maxH,
 954                                           int incW, int incH )
 955 {
 956     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 957
 958     const wxSize minSize = GetMinSize();
 959     const wxSize maxSize = GetMaxSize();
 960     GdkGeometry hints;
 961     int hints_mask = 0;
 962     if (minSize.x > 0 || minSize.y > 0)
 963     {
 964         hints_mask |= GDK_HINT_MIN_SIZE;
 965         hints.min_width = minSize.x - m_decorSize.x;
 966         if (hints.min_width < 0)
 967             hints.min_width = 0;
 968         hints.min_height = minSize.y - m_decorSize.y;
 969         if (hints.min_height < 0)
 970             hints.min_height = 0;
 971     }
 972     if (maxSize.x > 0 || maxSize.y > 0)
 973     {
 974         hints_mask |= GDK_HINT_MAX_SIZE;
 975         hints.max_width = maxSize.x - m_decorSize.x;
 976         if (hints.max_width < 0)
 977             hints.max_width = INT_MAX;
 978         hints.max_height = maxSize.y - m_decorSize.y;
 979         if (hints.max_height < 0)
 980             hints.max_height = INT_MAX;
 981     }
 982     if (incW > 0 || incH > 0)
 983     {
 984         hints_mask |= GDK_HINT_RESIZE_INC;
 985         hints.width_inc  = incW > 0 ? incW : 1;
 986         hints.height_inc = incH > 0 ? incH : 1;
 987     }
 988     gtk_window_set_geometry_hints(
 989         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
 990 }
 991
 992 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
 993 {
 994     if (!IsMaximized() && !IsFullScreen())
 995         GetCachedDecorSize() = decorSize;
 996     if (m_decorSize != decorSize)
 997     {
 998         const wxSize diff = decorSize - m_decorSize;
 999         m_decorSize = decorSize;
1000         bool resized = false;
1001         if (m_deferShow)
1002         {
1003             // keep overall size unchanged by shrinking m_widget
1004             int w, h;
1005             GTKDoGetSize(&w, &h);
1006             // but not if size would be less than minimum, it won't take effect
1007             const wxSize minSize = GetMinSize();
1008             if (w >= minSize.x && h >= minSize.y)
1009             {
1010                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
1011                 resized = true;
1012             }
1013         }
1014         if (!resized)
1015         {
1016             // adjust overall size to match change in frame extents
1017             m_width  += diff.x;
1018             m_height += diff.y;
1019             if (m_width  < 0) m_width  = 0;
1020             if (m_height < 0) m_height = 0;
1021             m_oldClientWidth = 0;
1022             gtk_widget_queue_resize(m_wxwindow);
1023         }
1024     }
1025     if (m_deferShow)
1026     {
1027         // gtk_widget_show() was deferred, do it now
1028         m_deferShow = false;
1029         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1030         wxSizeEvent sizeEvent(GetSize(), GetId());
1031         sizeEvent.SetEventObject(this);
1032         HandleWindowEvent(sizeEvent);
1033
1034         gtk_widget_show(m_widget);
1035
1036         wxShowEvent showEvent(GetId(), true);
1037         showEvent.SetEventObject(this);
1038         HandleWindowEvent(showEvent);
1039     }
1040 }
1041
1042 wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
1043 {
1044     static wxSize size[8];
1045
1046     int index = 0;
1047     // title bar
1048     if (m_gdkDecor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
1049         index = 1;
1050     // border
1051     if (m_gdkDecor & GDK_DECOR_BORDER)
1052         index |= 2;
1053     // utility window decor can be different
1054     if (m_windowStyle & wxFRAME_TOOL_WINDOW)
1055         index |= 4;
1056     return size[index];
1057 }
1058
1059 void wxTopLevelWindowGTK::OnInternalIdle()
1060 {
1061     wxWindow::OnInternalIdle();
1062
1063     // Synthetize activate events.
1064     if ( g_sendActivateEvent != -1 )
1065     {
1066         bool activate = g_sendActivateEvent != 0;
1067
1068         // if (!activate) wxPrintf( wxT("de") );
1069         // wxPrintf( wxT("activate\n") );
1070
1071         // do it only once
1072         g_sendActivateEvent = -1;
1073
1074         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1075     }
1076 }
1077
1078 // ----------------------------------------------------------------------------
1079 // frame title/icon
1080 // ----------------------------------------------------------------------------
1081
1082 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1083 {
1084     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1085
1086     if ( title == m_title )
1087         return;
1088
1089     m_title = title;
1090
1091     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1092 }
1093
1094 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1095 {
1096     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1097
1098     wxTopLevelWindowBase::SetIcons( icons );
1099
1100     // Setting icons before window is realized can cause a GTK assertion if
1101     // another TLW is realized before this one, and it has this one as it's
1102     // transient parent. The life demo exibits this problem.
1103     if (GTK_WIDGET_REALIZED(m_widget))
1104     {
1105         GList* list = NULL;
1106         for (size_t i = icons.GetIconCount(); i--;)
1107             list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1108         gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1109         g_list_free(list);
1110     }
1111 }
1112
1113 // ----------------------------------------------------------------------------
1114 // frame state: maximized/iconized/normal
1115 // ----------------------------------------------------------------------------
1116
1117 void wxTopLevelWindowGTK::Maximize(bool maximize)
1118 {
1119     if (maximize)
1120         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1121     else
1122         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1123 }
1124
1125 bool wxTopLevelWindowGTK::IsMaximized() const
1126 {
1127     if(!m_widget->window)
1128         return false;
1129
1130     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1131 }
1132
1133 void wxTopLevelWindowGTK::Restore()
1134 {
1135     // "Present" seems similar enough to "restore"
1136     gtk_window_present( GTK_WINDOW( m_widget ) );
1137 }
1138
1139 void wxTopLevelWindowGTK::Iconize( bool iconize )
1140 {
1141     if (iconize)
1142         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1143     else
1144         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1145 }
1146
1147 bool wxTopLevelWindowGTK::IsIconized() const
1148 {
1149     return m_isIconized;
1150 }
1151
1152 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1153 {
1154     if ( iconize != m_isIconized )
1155     {
1156         m_isIconized = iconize;
1157         (void)SendIconizeEvent(iconize);
1158     }
1159 }
1160
1161 void wxTopLevelWindowGTK::AddGrab()
1162 {
1163     if (!m_grabbed)
1164     {
1165         m_grabbed = true;
1166         gtk_grab_add( m_widget );
1167         wxGUIEventLoop().Run();
1168         gtk_grab_remove( m_widget );
1169     }
1170 }
1171
1172 void wxTopLevelWindowGTK::RemoveGrab()
1173 {
1174     if (m_grabbed)
1175     {
1176         gtk_main_quit();
1177         m_grabbed = false;
1178     }
1179 }
1180
1181
1182 // helper
1183 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1184 {
1185     if (window)
1186     {
1187         if (region.IsEmpty())
1188         {
1189             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1190         }
1191         else
1192         {
1193             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1194             return true;
1195         }
1196     }
1197     return false;
1198 }
1199
1200
1201 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1202 {
1203     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1204                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1205
1206     if ( GTK_WIDGET_REALIZED(m_widget) )
1207     {
1208         if ( m_wxwindow )
1209             do_shape_combine_region(m_wxwindow->window, region);
1210
1211         return do_shape_combine_region(m_widget->window, region);
1212     }
1213     else // not realized yet
1214     {
1215         // store the shape to set, it will be really set once we're realized
1216         m_shape = region;
1217
1218         // we don't know if we're going to succeed or fail, be optimistic by
1219         // default
1220         return true;
1221     }
1222 }
1223
1224 bool wxTopLevelWindowGTK::IsActive()
1225 {
1226     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1227 }
1228
1229 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1230 {
1231     bool new_hint_value = false;
1232
1233     // FIXME: This is a workaround to focus handling problem
1234     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1235     // yet been processed, and the internal focus system is not up to date yet.
1236     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1237     ::wxYieldIfNeeded();
1238
1239     if(m_urgency_hint >= 0)
1240         g_source_remove(m_urgency_hint);
1241
1242     m_urgency_hint = -2;
1243
1244     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1245     {
1246         new_hint_value = true;
1247
1248         if (flags & wxUSER_ATTENTION_INFO)
1249         {
1250             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1251         } else {
1252             m_urgency_hint = -1;
1253         }
1254     }
1255
1256 #if GTK_CHECK_VERSION(2,7,0)
1257     if(!gtk_check_version(2,7,0))
1258         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1259     else
1260 #endif
1261         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1262 }
1263
1264 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1265 {
1266     // Store which styles were changed
1267     long styleChanges = style ^ m_windowStyle;
1268
1269     // Process wxWindow styles. This also updates the internal variable
1270     // Therefore m_windowStyle bits carry now the _new_ style values
1271     wxWindow::SetWindowStyleFlag(style);
1272
1273     // just return for now if widget does not exist yet
1274     if (!m_widget)
1275         return;
1276
1277     if ( styleChanges & wxSTAY_ON_TOP )
1278     {
1279         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1280                                   m_windowStyle & wxSTAY_ON_TOP);
1281     }
1282
1283     if ( styleChanges & wxFRAME_NO_TASKBAR )
1284     {
1285         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1286                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1287     }
1288 }
1289
1290 /* Get the X Window between child and the root window.
1291    This should usually be the WM managed XID */
1292 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1293 {
1294     Window root, parent;
1295     Window* children;
1296     unsigned int nchildren;
1297
1298     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1299     XFree(children);
1300
1301     while (parent != root) {
1302         child = parent;
1303         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1304         XFree(children);
1305     }
1306
1307     return child;
1308 }
1309
1310 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1311 {
1312     if (!m_widget || !m_widget->window)
1313         return false;
1314
1315     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1316     // We need to get the X Window that has the root window as the immediate parent
1317     // and m_widget->window as a child. This should be the X Window that the WM manages and
1318     // from which the opacity property is checked from.
1319     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1320
1321
1322     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1323     if (alpha == 0xff)
1324         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1325     else
1326     {
1327         long opacity = alpha * 0x1010101L;
1328         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1329                         XA_CARDINAL, 32, PropModeReplace,
1330                         (unsigned char *) &opacity, 1L);
1331     }
1332     XSync(dpy, False);
1333     return true;
1334 }
1335
1336 bool wxTopLevelWindowGTK::CanSetTransparent()
1337 {
1338     // allow to override automatic detection as it's far from perfect
1339     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1340     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1341     {
1342         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1343     }
1344
1345 #if GTK_CHECK_VERSION(2,10,0)
1346     if (!gtk_check_version(2,10,0))
1347     {
1348         return (gtk_widget_is_composited (m_widget));
1349     }
1350     else
1351 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1352     {
1353         return false;
1354     }
1355
1356 #if 0 // Don't be optimistic here for the sake of wxAUI
1357     int opcode, event, error;
1358     // Check for the existence of a RGBA visual instead?
1359     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1360                            "Composite", &opcode, &event, &error);
1361 #endif
1362 }
1363
1364 void wxTopLevelWindowGTK::OnSysColourChanged(wxSysColourChangedEvent& event)
1365 {
1366     // We don't know the order in which top-level windows will
1367     // be notified, so we need to clear the system objects
1368     // for each top-level window.
1369     extern void wxClearGtkSystemObjects();
1370     wxClearGtkSystemObjects();
1371
1372     // wxWindowBase::OnSysColourChanged will propagate event
1373     // to children
1374     event.Skip();
1375 }