src/gtk/toplevel.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/toplevel.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 #ifdef __VMS
  22 #define XIconifyWindow XICONIFYWINDOW
  23 #endif
  24
  25 #include "wx/toplevel.h"
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/frame.h"
  29     #include "wx/icon.h"
  30     #include "wx/log.h"
  31     #include "wx/app.h"
  32 #endif
  33
  34 #include "wx/gtk/private.h"
  35 #include "wx/evtloop.h"
  36 #include "wx/sysopt.h"
  37
  38 #include <gtk/gtk.h>
  39 #include <gdk/gdkx.h>
  40
  41 #include "wx/gtk/private/win_gtk.h"
  42
  43 #include "wx/unix/utilsx11.h"
  44
  45 // XA_CARDINAL
  46 #include <X11/Xatom.h>
  47
  48 #if wxUSE_LIBHILDON
  49     #include <hildon-widgets/hildon-program.h>
  50     #include <hildon-widgets/hildon-window.h>
  51 #endif // wxUSE_LIBHILDON
  52
  53 // ----------------------------------------------------------------------------
  54 // data
  55 // ----------------------------------------------------------------------------
  56
  57 // this is incremented while a modal dialog is shown
  58 int wxOpenModalDialogsCount = 0;
  59
  60 // the frame that is currently active (i.e. its child has focus). It is
  61 // used to generate wxActivateEvents
  62 static wxTopLevelWindowGTK *g_activeFrame = (wxTopLevelWindowGTK*) NULL;
  63 static wxTopLevelWindowGTK *g_lastActiveFrame = (wxTopLevelWindowGTK*) NULL;
  64
  65 // if we detect that the app has got/lost the focus, we set this variable to
  66 // either TRUE or FALSE and an activate event will be sent during the next
  67 // OnIdle() call and it is reset to -1: this value means that we shouldn't
  68 // send any activate events at all
  69 static int g_sendActivateEvent = -1;
  70
  71 //-----------------------------------------------------------------------------
  72 // RequestUserAttention related functions
  73 //-----------------------------------------------------------------------------
  74
  75 extern "C" {
  76 static void wxgtk_window_set_urgency_hint (GtkWindow *win,
  77                                            gboolean setting)
  78 {
  79     wxASSERT_MSG( GTK_WIDGET_REALIZED(win), wxT("wxgtk_window_set_urgency_hint: GdkWindow not realized") );
  80     GdkWindow *window = GTK_WIDGET(win)->window;
  81     XWMHints *wm_hints;
  82
  83     wm_hints = XGetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window));
  84
  85     if (!wm_hints)
  86         wm_hints = XAllocWMHints();
  87
  88     if (setting)
  89         wm_hints->flags |= XUrgencyHint;
  90     else
  91         wm_hints->flags &= ~XUrgencyHint;
  92
  93     XSetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window), wm_hints);
  94     XFree(wm_hints);
  95 }
  96
  97 static gboolean gtk_frame_urgency_timer_callback( wxTopLevelWindowGTK *win )
  98 {
  99 #if GTK_CHECK_VERSION(2,7,0)
 100     if(!gtk_check_version(2,7,0))
 101         gtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 102     else
 103 #endif
 104         wxgtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 105
 106     win->m_urgency_hint = -2;
 107     return FALSE;
 108 }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 // "focus_in_event"
 113 //-----------------------------------------------------------------------------
 114
 115 extern "C" {
 116 static gboolean gtk_frame_focus_in_callback( GtkWidget *widget,
 117                                          GdkEvent *WXUNUSED(event),
 118                                          wxTopLevelWindowGTK *win )
 119 {
 120     switch ( g_sendActivateEvent )
 121     {
 122         case -1:
 123             // we've got focus from outside, synthetize wxActivateEvent
 124             g_sendActivateEvent = 1;
 125             break;
 126
 127         case 0:
 128             // another our window just lost focus, it was already ours before
 129             // - don't send any wxActivateEvent
 130             g_sendActivateEvent = -1;
 131             break;
 132     }
 133
 134     g_activeFrame = win;
 135     g_lastActiveFrame = g_activeFrame;
 136
 137     // wxPrintf( wxT("active: %s\n"), win->GetTitle().c_str() );
 138
 139     // MR: wxRequestUserAttention related block
 140     switch( win->m_urgency_hint )
 141     {
 142         default:
 143             g_source_remove( win->m_urgency_hint );
 144             // no break, fallthrough to remove hint too
 145         case -1:
 146 #if GTK_CHECK_VERSION(2,7,0)
 147             if(!gtk_check_version(2,7,0))
 148                 gtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 149             else
 150 #endif
 151             {
 152                 wxgtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 153             }
 154
 155             win->m_urgency_hint = -2;
 156             break;
 157
 158         case -2: break;
 159     }
 160
 161     wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 162     wxActivateEvent event(wxEVT_ACTIVATE, true, g_activeFrame->GetId());
 163     event.SetEventObject(g_activeFrame);
 164     g_activeFrame->HandleWindowEvent(event);
 165
 166     return FALSE;
 167 }
 168 }
 169
 170 //-----------------------------------------------------------------------------
 171 // "focus_out_event"
 172 //-----------------------------------------------------------------------------
 173
 174 extern "C" {
 175 static
 176 gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
 177                                       GdkEventFocus *WXUNUSED(gdk_event),
 178                                       wxTopLevelWindowGTK * WXUNUSED(win))
 179 {
 180     // if the focus goes out of our app alltogether, OnIdle() will send
 181     // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
 182     // g_sendActivateEvent to -1
 183     g_sendActivateEvent = 0;
 184
 185     // wxASSERT_MSG( (g_activeFrame == win), wxT("TLW deactivatd although it wasn't active") );
 186
 187     // wxPrintf( wxT("inactive: %s\n"), win->GetTitle().c_str() );
 188
 189     if (g_activeFrame)
 190     {
 191         wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 192         wxActivateEvent event(wxEVT_ACTIVATE, false, g_activeFrame->GetId());
 193         event.SetEventObject(g_activeFrame);
 194         g_activeFrame->HandleWindowEvent(event);
 195
 196         g_activeFrame = NULL;
 197     }
 198
 199     return FALSE;
 200 }
 201 }
 202
 203 //-----------------------------------------------------------------------------
 204 // "size_allocate" from m_wxwindow
 205 //-----------------------------------------------------------------------------
 206
 207 extern "C" {
 208 static void
 209 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
 210 {
 211     if (win->m_oldClientWidth  != alloc->width ||
 212         win->m_oldClientHeight != alloc->height)
 213     {
 214         win->m_oldClientWidth  = alloc->width;
 215         win->m_oldClientHeight = alloc->height;
 216
 217         wxSize size(win->m_widget->allocation.width,
 218                     win->m_widget->allocation.height);
 219         size += win->m_decorSize;
 220         win->m_width  = size.x;
 221         win->m_height = size.y;
 222
 223         if (!win->IsIconized())
 224         {
 225             wxSizeEvent event(size, win->GetId());
 226             event.SetEventObject(win);
 227             win->HandleWindowEvent(event);
 228         }
 229         // else the window is currently unmapped, don't generate size events
 230     }
 231 }
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // "size_request"
 236 // ----------------------------------------------------------------------------
 237
 238 extern "C" {
 239 static
 240 void wxgtk_tlw_size_request_callback(GtkWidget * WXUNUSED(widget),
 241                                      GtkRequisition *requisition,
 242                                      wxTopLevelWindowGTK *win)
 243 {
 244     // we must return the size of the window without WM decorations, otherwise
 245     // GTK+ gets confused, so don't call just GetSize() here
 246     win->GTKDoGetSize(&requisition->width, &requisition->height);
 247 }
 248 }
 249
 250 //-----------------------------------------------------------------------------
 251 // "delete_event"
 252 //-----------------------------------------------------------------------------
 253
 254 extern "C" {
 255 static gboolean
 256 gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
 257                            GdkEvent *WXUNUSED(event),
 258                            wxTopLevelWindowGTK *win )
 259 {
 260     if (win->IsEnabled() &&
 261         (wxOpenModalDialogsCount == 0 || (win->GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) ||
 262          win->IsGrabbed()))
 263         win->Close();
 264
 265     return TRUE;
 266 }
 267 }
 268
 269 //-----------------------------------------------------------------------------
 270 // "configure_event"
 271 //-----------------------------------------------------------------------------
 272
 273 extern "C" {
 274 static gboolean
 275 gtk_frame_configure_callback( GtkWidget* widget,
 276                               GdkEventConfigure *WXUNUSED(event),
 277                               wxTopLevelWindowGTK *win )
 278 {
 279     if (!win->m_hasVMT || !win->IsShown())
 280         return FALSE;
 281
 282     wxPoint point;
 283     gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
 284
 285     win->m_x = point.x;
 286     win->m_y = point.y;
 287     wxMoveEvent mevent(point, win->GetId());
 288     mevent.SetEventObject( win );
 289     win->HandleWindowEvent( mevent );
 290
 291     return FALSE;
 292 }
 293 }
 294
 295 //-----------------------------------------------------------------------------
 296 // "realize" from m_widget
 297 //-----------------------------------------------------------------------------
 298
 299 // we cannot the WM hints and icons before the widget has been realized,
 300 // so we do this directly after realization
 301
 302 extern "C" {
 303 static void
 304 gtk_frame_realized_callback( GtkWidget * WXUNUSED(widget),
 305                              wxTopLevelWindowGTK *win )
 306 {
 307     gdk_window_set_decorations(win->m_widget->window,
 308                                (GdkWMDecoration)win->m_gdkDecor);
 309     gdk_window_set_functions(win->m_widget->window,
 310                                (GdkWMFunction)win->m_gdkFunc);
 311
 312     // GTK's shrinking/growing policy
 313     if ( !(win->m_gdkFunc & GDK_FUNC_RESIZE) )
 314         gtk_window_set_resizable(GTK_WINDOW(win->m_widget), FALSE);
 315     else
 316         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 317
 318     const wxIconBundle& icons = win->GetIcons();
 319     if (icons.GetIconCount())
 320         win->SetIcons(icons);
 321
 322     if (win->HasFlag(wxFRAME_SHAPED))
 323         win->SetShape(win->m_shape); // it will really set the window shape now
 324 }
 325 }
 326
 327 //-----------------------------------------------------------------------------
 328 // "map_event" from m_widget
 329 //-----------------------------------------------------------------------------
 330
 331 extern "C" {
 332 static gboolean
 333 gtk_frame_map_callback( GtkWidget*,
 334                         GdkEvent * WXUNUSED(event),
 335                         wxTopLevelWindow *win )
 336 {
 337     const bool wasIconized = win->IsIconized();
 338     win->SetIconizeState(false);
 339     if (wasIconized)
 340     {
 341         // Because GetClientSize() returns (0,0) when IsIconized() is true,
 342         // a size event must be generated, just in case GetClientSize() was
 343         // called while iconized. This specifically happens when restoring a
 344         // tlw that was "rolled up" with some WMs.
 345         // Queue a resize rather than sending size event directly to allow
 346         // children to be made visible first.
 347         win->m_oldClientWidth = 0;
 348         gtk_widget_queue_resize(win->m_wxwindow);
 349     }
 350     // it is possible for m_isShown to be false here, see bug #9909
 351     if (win->wxWindowBase::Show(true))
 352     {
 353         wxShowEvent eventShow(win->GetId(), true);
 354         eventShow.SetEventObject(win);
 355         win->GetEventHandler()->ProcessEvent(eventShow);
 356     }
 357     return false;
 358 }
 359 }
 360
 361 //-----------------------------------------------------------------------------
 362 // "unmap_event" from m_widget
 363 //-----------------------------------------------------------------------------
 364
 365 extern "C" {
 366 static gboolean
 367 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
 368                           GdkEvent * WXUNUSED(event),
 369                           wxTopLevelWindow *win )
 370 {
 371     win->SetIconizeState(true);
 372     return false;
 373 }
 374 }
 375
 376 //-----------------------------------------------------------------------------
 377
 378 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
 379 {
 380     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 381     Atom xproperty = gdk_x11_atom_to_xatom_for_display(
 382                         gdk_drawable_get_display(window), property);
 383     Atom type;
 384     int format;
 385     gulong nitems, bytes_after;
 386     guchar* data;
 387     Status status = XGetWindowProperty(
 388         gdk_x11_drawable_get_xdisplay(window),
 389         gdk_x11_drawable_get_xid(window),
 390         xproperty,
 391         0, 4, false, XA_CARDINAL,
 392         &type, &format, &nitems, &bytes_after, &data);
 393     const bool success = status == Success && data && nitems == 4;
 394     if (success)
 395     {
 396         long* p = (long*)data;
 397         if (left)   *left   = int(p[0]);
 398         if (right)  *right  = int(p[1]);
 399         if (top)    *top    = int(p[2]);
 400         if (bottom) *bottom = int(p[3]);
 401     }
 402     if (data)
 403         XFree(data);
 404     return success;
 405 }
 406
 407 //-----------------------------------------------------------------------------
 408 // "property_notify_event" from m_widget
 409 //-----------------------------------------------------------------------------
 410
 411 extern "C" {
 412 static gboolean property_notify_event(
 413     GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
 414 {
 415     // Watch for changes to _NET_FRAME_EXTENTS property
 416     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 417     if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property)
 418     {
 419         int left, right, top, bottom;
 420         if (wxGetFrameExtents(event->window, &left, &right, &top, &bottom))
 421         {
 422             const wxSize decorSize =
 423                 wxSize(left + right, top + bottom);
 424             win->GTKUpdateDecorSize(decorSize);
 425         }
 426     }
 427     return false;
 428 }
 429 }
 430
 431 // ----------------------------------------------------------------------------
 432 // wxTopLevelWindowGTK creation
 433 // ----------------------------------------------------------------------------
 434
 435 void wxTopLevelWindowGTK::Init()
 436 {
 437     m_mainWidget = (GtkWidget*) NULL;
 438     m_isIconized = false;
 439     m_fsIsShowing = false;
 440     m_themeEnabled = true;
 441     m_gdkDecor =
 442     m_gdkFunc = 0;
 443     m_grabbed = false;
 444     m_deferShow = true;
 445     m_updateDecorSize = true;
 446
 447     m_urgency_hint = -2;
 448 }
 449
 450 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 451                                   wxWindowID id,
 452                                   const wxString& title,
 453                                   const wxPoint& pos,
 454                                   const wxSize& sizeOrig,
 455                                   long style,
 456                                   const wxString &name )
 457 {
 458     // always create a frame of some reasonable, even if arbitrary, size (at
 459     // least for MSW compatibility)
 460     wxSize size = sizeOrig;
 461     size.x = WidthDefault(size.x);
 462     size.y = HeightDefault(size.y);
 463
 464     wxTopLevelWindows.Append( this );
 465
 466     if (!PreCreation( parent, pos, size ) ||
 467         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 468     {
 469         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 470         return false;
 471     }
 472
 473     m_title = title;
 474
 475     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 476     //     e.g. in wxTaskBarIconAreaGTK
 477     if (m_widget == NULL)
 478     {
 479 #if wxUSE_LIBHILDON
 480         // we must create HildonWindow and not a normal GtkWindow as the latter
 481         // doesn't look correctly in Maemo environment and it must also be
 482         // registered with the main program object
 483         m_widget = hildon_window_new();
 484         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 485                                   HILDON_WINDOW(m_widget));
 486 #else // !wxUSE_LIBHILDON
 487         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 488         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 489         {
 490             // Tell WM that this is a dialog window and make it center
 491             // on parent by default (this is what GtkDialog ctor does):
 492             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 493                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 494             gtk_window_set_position(GTK_WINDOW(m_widget),
 495                                     GTK_WIN_POS_CENTER_ON_PARENT);
 496         }
 497         else
 498         {
 499             if (style & wxFRAME_TOOL_WINDOW)
 500             {
 501                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 502                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 503
 504                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 505                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 506                 // For consistency between WMs and with Windows, we
 507                 // should set the NO_TASKBAR flag which will apply
 508                 // the set_skip_taskbar_hint if it is available,
 509                 // ensuring no taskbar entry will appear.
 510                 style |= wxFRAME_NO_TASKBAR;
 511             }
 512         }
 513 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 514
 515         g_object_ref(m_widget);
 516     }
 517
 518     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 519     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 520                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 521                        (style & wxFRAME_FLOAT_ON_PARENT)))
 522     {
 523         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 524                                       GTK_WINDOW(topParent->m_widget) );
 525     }
 526
 527     if (style & wxFRAME_NO_TASKBAR)
 528     {
 529         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 530     }
 531
 532     if (style & wxSTAY_ON_TOP)
 533     {
 534         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 535     }
 536
 537 #if 0
 538     if (!name.empty())
 539         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 540 #endif
 541
 542     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 543     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 544
 545     g_signal_connect (m_widget, "delete_event",
 546                       G_CALLBACK (gtk_frame_delete_callback), this);
 547
 548     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 549     m_mainWidget = gtk_vbox_new(false, 0);
 550     gtk_widget_show( m_mainWidget );
 551     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 552     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 553
 554     // m_wxwindow is the client area
 555     m_wxwindow = wxPizza::New();
 556     gtk_widget_show( m_wxwindow );
 557     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 558
 559     // we donm't allow the frame to get the focus as otherwise
 560     // the frame will grab it at arbitrary focus changes
 561     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 562
 563     if (m_parent) m_parent->AddChild( this );
 564
 565     g_signal_connect(m_wxwindow, "size_allocate",
 566         G_CALLBACK(size_allocate), this);
 567
 568     g_signal_connect (m_widget, "size_request",
 569                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 570     PostCreation();
 571
 572     if ((m_x != -1) || (m_y != -1))
 573         gtk_widget_set_uposition( m_widget, m_x, m_y );
 574
 575     //  we cannot set MWM hints and icons before the widget has
 576     //  been realized, so we do this directly after realization
 577     g_signal_connect (m_widget, "realize",
 578                       G_CALLBACK (gtk_frame_realized_callback), this);
 579
 580     // map and unmap for iconized state
 581     g_signal_connect (m_widget, "map_event",
 582                       G_CALLBACK (gtk_frame_map_callback), this);
 583     g_signal_connect (m_widget, "unmap_event",
 584                       G_CALLBACK (gtk_frame_unmap_callback), this);
 585
 586     // for wxMoveEvent
 587     g_signal_connect (m_widget, "configure_event",
 588                       G_CALLBACK (gtk_frame_configure_callback), this);
 589
 590     // activation
 591     g_signal_connect_after (m_widget, "focus_in_event",
 592                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 593     g_signal_connect_after (m_widget, "focus_out_event",
 594                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 595
 596     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 597     g_signal_connect(m_widget, "property_notify_event",
 598         G_CALLBACK(property_notify_event), this);
 599
 600     // translate wx decorations styles into Motif WM hints (they are recognized
 601     // by other WMs as well)
 602
 603     // always enable moving the window as we have no separate flag for enabling
 604     // it
 605     m_gdkFunc = GDK_FUNC_MOVE;
 606
 607     if ( style & wxCLOSE_BOX )
 608         m_gdkFunc |= GDK_FUNC_CLOSE;
 609
 610     if ( style & wxMINIMIZE_BOX )
 611         m_gdkFunc |= GDK_FUNC_MINIMIZE;
 612
 613     if ( style & wxMAXIMIZE_BOX )
 614         m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 615
 616     if ( (style & wxSIMPLE_BORDER) || (style & wxNO_BORDER) )
 617     {
 618         m_gdkDecor = 0;
 619     }
 620     else // have border
 621     {
 622         m_gdkDecor = GDK_DECOR_BORDER;
 623
 624         if ( style & wxCAPTION )
 625             m_gdkDecor |= GDK_DECOR_TITLE;
 626
 627         if ( style & wxSYSTEM_MENU )
 628             m_gdkDecor |= GDK_DECOR_MENU;
 629
 630         if ( style & wxMINIMIZE_BOX )
 631             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 632
 633         if ( style & wxMAXIMIZE_BOX )
 634             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 635
 636         if ( style & wxRESIZE_BORDER )
 637         {
 638            m_gdkFunc |= GDK_FUNC_RESIZE;
 639            m_gdkDecor |= GDK_DECOR_RESIZEH;
 640         }
 641     }
 642
 643     m_decorSize = GetCachedDecorSize();
 644     int w, h;
 645     GTKDoGetSize(&w, &h);
 646     gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
 647
 648     return true;
 649 }
 650
 651 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 652 {
 653 #if wxUSE_LIBHILDON
 654     // it can also be a (standard) dialog
 655     if ( HILDON_IS_WINDOW(m_widget) )
 656     {
 657         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 658                                      HILDON_WINDOW(m_widget));
 659     }
 660 #endif // wxUSE_LIBHILDON
 661
 662     if (m_grabbed)
 663     {
 664         wxFAIL_MSG(_T("Window still grabbed"));
 665         RemoveGrab();
 666     }
 667
 668     m_isBeingDeleted = true;
 669
 670     // it may also be GtkScrolledWindow in the case of an MDI child
 671     if (GTK_IS_WINDOW(m_widget))
 672     {
 673         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 674     }
 675
 676     if (g_activeFrame == this)
 677         g_activeFrame = NULL;
 678     if (g_lastActiveFrame == this)
 679         g_lastActiveFrame = NULL;
 680 }
 681
 682 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 683 {
 684     if (enable)
 685         m_gdkFunc |= GDK_FUNC_CLOSE;
 686     else
 687         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 688
 689     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 690         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 691
 692     return true;
 693 }
 694
 695 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 696 {
 697     if (show == m_fsIsShowing)
 698         return false; // return what?
 699
 700     m_fsIsShowing = show;
 701
 702     wxX11FullScreenMethod method =
 703         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 704                                  (WXWindow)GDK_ROOT_WINDOW());
 705
 706     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 707     //     to switch to fullscreen, which is not always available. We must
 708     //     check if WM supports the spec and use legacy methods if it
 709     //     doesn't.
 710     if ( method == wxX11_FS_WMSPEC )
 711     {
 712         if (show)
 713             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 714         else
 715             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 716     }
 717     else
 718     {
 719         GdkWindow *window = m_widget->window;
 720
 721         if (show)
 722         {
 723             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 724             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 725
 726             int screen_width,screen_height;
 727             wxDisplaySize( &screen_width, &screen_height );
 728
 729             gint client_x, client_y, root_x, root_y;
 730             gint width, height;
 731
 732             m_fsSaveGdkFunc = m_gdkFunc;
 733             m_fsSaveGdkDecor = m_gdkDecor;
 734             m_gdkFunc = m_gdkDecor = 0;
 735             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 736             gdk_window_set_functions(window, (GdkWMFunction)0);
 737
 738             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 739             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 740                          &width, &height, NULL);
 741
 742             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 743                         screen_width + 1, screen_height + 1);
 744
 745             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 746                                     (WXWindow)GDK_ROOT_WINDOW(),
 747                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 748                                     show, &m_fsSaveFrame, method);
 749         }
 750         else // hide
 751         {
 752             m_gdkFunc = m_fsSaveGdkFunc;
 753             m_gdkDecor = m_fsSaveGdkDecor;
 754             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 755             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 756
 757             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 758                                     (WXWindow)GDK_ROOT_WINDOW(),
 759                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 760                                     show, &m_fsSaveFrame, method);
 761
 762             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 763                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 764         }
 765     }
 766
 767     // documented behaviour is to show the window if it's still hidden when
 768     // showing it full screen
 769     if (show)
 770         Show();
 771
 772     return true;
 773 }
 774
 775 // ----------------------------------------------------------------------------
 776 // overridden wxWindow methods
 777 // ----------------------------------------------------------------------------
 778
 779 bool wxTopLevelWindowGTK::Show( bool show )
 780 {
 781     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 782
 783     bool deferShow = show && !m_isShown && m_deferShow;
 784     if (deferShow)
 785     {
 786         deferShow = false;
 787         if (!GTK_WIDGET_REALIZED(m_widget) &&
 788             g_signal_handler_find(m_widget,
 789                 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 790                 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
 791                 0, NULL, NULL, this))
 792         {
 793             if (gdk_x11_screen_supports_net_wm_hint(
 794                 gtk_widget_get_screen(m_widget),
 795                 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)))
 796             {
 797                 deferShow = true;
 798             }
 799             else
 800             {
 801                 // Don't allow changes to m_decorSize, it breaks saving/restoring
 802                 // window size with GetSize()/SetSize() because it makes window
 803                 // bigger between each restore and save.
 804                 m_updateDecorSize = false;
 805             }
 806         }
 807         m_deferShow = deferShow;
 808     }
 809     if (deferShow)
 810     {
 811         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 812         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 813         // notification is received, so correct frame extents are known.
 814         // This allows resizing m_widget to keep the overall size in sync with
 815         // what wxWidgets expects it to be without an obvious change in the
 816         // window size immediately after it becomes visible.
 817
 818         // Realize m_widget, so m_widget->window can be used. Realizing normally
 819         // causes the widget tree to be size_allocated, which generates size
 820         // events in the wrong order. However, the size_allocates will not be
 821         // done if the allocation is not the default (1,1).
 822         const int alloc_width = m_widget->allocation.width;
 823         if (alloc_width == 1)
 824             m_widget->allocation.width = 2;
 825         gtk_widget_realize(m_widget);
 826         if (alloc_width == 1)
 827             m_widget->allocation.width = 1;
 828
 829         // send _NET_REQUEST_FRAME_EXTENTS
 830         XClientMessageEvent xevent;
 831         memset(&xevent, 0, sizeof(xevent));
 832         xevent.type = ClientMessage;
 833         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 834         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 835             gdk_drawable_get_display(m_widget->window),
 836             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 837         xevent.format = 32;
 838         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 839         XSendEvent(display, DefaultRootWindow(display), false,
 840             SubstructureNotifyMask | SubstructureRedirectMask,
 841             (XEvent*)&xevent);
 842
 843         // defer calling gtk_widget_show()
 844         m_isShown = true;
 845         return true;
 846     }
 847
 848     if (show && !GTK_WIDGET_REALIZED(m_widget))
 849     {
 850         // size_allocate signals occur in reverse order (bottom to top).
 851         // Things work better if the initial wxSizeEvents are sent (from the
 852         // top down), before the initial size_allocate signals occur.
 853         wxSizeEvent event(GetSize(), GetId());
 854         event.SetEventObject(this);
 855         HandleWindowEvent(event);
 856     }
 857
 858     bool change = wxTopLevelWindowBase::Show(show);
 859
 860     if (change && !show)
 861     {
 862         // make sure window has a non-default position, so when it is shown
 863         // again, it won't be repositioned by WM as if it were a new window
 864         // Note that this must be done _after_ the window is hidden.
 865         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 866     }
 867
 868     return change;
 869 }
 870
 871 void wxTopLevelWindowGTK::Raise()
 872 {
 873     gtk_window_present( GTK_WINDOW( m_widget ) );
 874 }
 875
 876 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 877 {
 878     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 879 }
 880
 881 // ----------------------------------------------------------------------------
 882 // window geometry
 883 // ----------------------------------------------------------------------------
 884
 885 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 886 {
 887     wxSize size(m_width, m_height);
 888     size -= m_decorSize;
 889     if (size.x < 0) size.x = 0;
 890     if (size.y < 0) size.y = 0;
 891     if (width)  *width  = size.x;
 892     if (height) *height = size.y;
 893 }
 894
 895 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 896 {
 897     wxCHECK_RET( m_widget, wxT("invalid frame") );
 898
 899     // deal with the position first
 900     int old_x = m_x;
 901     int old_y = m_y;
 902
 903     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 904     {
 905         // -1 means "use existing" unless the flag above is specified
 906         if ( x != -1 )
 907             m_x = x;
 908         if ( y != -1 )
 909             m_y = y;
 910     }
 911     else // wxSIZE_ALLOW_MINUS_ONE
 912     {
 913         m_x = x;
 914         m_y = y;
 915     }
 916
 917     if ( m_x != old_x || m_y != old_y )
 918     {
 919         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 920     }
 921
 922     const wxSize oldSize(m_width, m_height);
 923     if (width >= 0)
 924         m_width = width;
 925     if (height >= 0)
 926         m_height = height;
 927     ConstrainSize();
 928     if (m_width != oldSize.x || m_height != oldSize.y)
 929     {
 930         int w, h;
 931         GTKDoGetSize(&w, &h);
 932         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 933
 934         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 935         wxSizeEvent event(GetSize(), GetId());
 936         event.SetEventObject(this);
 937         HandleWindowEvent(event);
 938     }
 939 }
 940
 941 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 942 {
 943     if (m_deferShow && !m_isShown)
 944         // Since client size is being explicitly set, don't change it later
 945         m_deferShow = false;
 946     wxTopLevelWindowBase::DoSetClientSize(width, height);
 947 }
 948
 949 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 950 {
 951     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 952
 953     if ( IsIconized() )
 954     {
 955         // for consistency with wxMSW, client area is supposed to be empty for
 956         // the iconized windows
 957         if ( width )
 958             *width = 0;
 959         if ( height )
 960             *height = 0;
 961     }
 962     else
 963     {
 964         GTKDoGetSize(width, height);
 965     }
 966 }
 967
 968 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 969                                           int maxW, int maxH,
 970                                           int incW, int incH )
 971 {
 972     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 973
 974     const wxSize minSize = GetMinSize();
 975     const wxSize maxSize = GetMaxSize();
 976     GdkGeometry hints;
 977     int hints_mask = 0;
 978     if (minSize.x > 0 || minSize.y > 0)
 979     {
 980         hints_mask |= GDK_HINT_MIN_SIZE;
 981         hints.min_width = minSize.x - m_decorSize.x;
 982         if (hints.min_width < 0)
 983             hints.min_width = 0;
 984         hints.min_height = minSize.y - m_decorSize.y;
 985         if (hints.min_height < 0)
 986             hints.min_height = 0;
 987     }
 988     if (maxSize.x > 0 || maxSize.y > 0)
 989     {
 990         hints_mask |= GDK_HINT_MAX_SIZE;
 991         hints.max_width = maxSize.x - m_decorSize.x;
 992         if (hints.max_width < 0)
 993             hints.max_width = INT_MAX;
 994         hints.max_height = maxSize.y - m_decorSize.y;
 995         if (hints.max_height < 0)
 996             hints.max_height = INT_MAX;
 997     }
 998     if (incW > 0 || incH > 0)
 999     {
1000         hints_mask |= GDK_HINT_RESIZE_INC;
1001         hints.width_inc  = incW > 0 ? incW : 1;
1002         hints.height_inc = incH > 0 ? incH : 1;
1003     }
1004     gtk_window_set_geometry_hints(
1005         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
1006 }
1007
1008 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
1009 {
1010     if (!IsMaximized() && !IsFullScreen())
1011         GetCachedDecorSize() = decorSize;
1012     if (m_updateDecorSize && m_decorSize != decorSize)
1013     {
1014         const wxSize diff = decorSize - m_decorSize;
1015         m_decorSize = decorSize;
1016         bool resized = false;
1017         if (m_deferShow)
1018         {
1019             // keep overall size unchanged by shrinking m_widget
1020             int w, h;
1021             GTKDoGetSize(&w, &h);
1022             // but not if size would be less than minimum, it won't take effect
1023             const wxSize minSize = GetMinSize();
1024             if (w >= minSize.x && h >= minSize.y)
1025             {
1026                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
1027                 resized = true;
1028             }
1029         }
1030         if (!resized)
1031         {
1032             // adjust overall size to match change in frame extents
1033             m_width  += diff.x;
1034             m_height += diff.y;
1035             if (m_width  < 0) m_width  = 0;
1036             if (m_height < 0) m_height = 0;
1037             m_oldClientWidth = 0;
1038             gtk_widget_queue_resize(m_wxwindow);
1039         }
1040     }
1041     if (m_deferShow)
1042     {
1043         // gtk_widget_show() was deferred, do it now
1044         m_deferShow = false;
1045         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1046         wxSizeEvent sizeEvent(GetSize(), GetId());
1047         sizeEvent.SetEventObject(this);
1048         HandleWindowEvent(sizeEvent);
1049
1050         gtk_widget_show(m_widget);
1051
1052         wxShowEvent showEvent(GetId(), true);
1053         showEvent.SetEventObject(this);
1054         HandleWindowEvent(showEvent);
1055     }
1056 }
1057
1058 wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
1059 {
1060     static wxSize size[8];
1061
1062     int index = 0;
1063     // title bar
1064     if (m_gdkDecor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
1065         index = 1;
1066     // border
1067     if (m_gdkDecor & GDK_DECOR_BORDER)
1068         index |= 2;
1069     // utility window decor can be different
1070     if (m_windowStyle & wxFRAME_TOOL_WINDOW)
1071         index |= 4;
1072     return size[index];
1073 }
1074
1075 void wxTopLevelWindowGTK::OnInternalIdle()
1076 {
1077     wxWindow::OnInternalIdle();
1078
1079     // Synthetize activate events.
1080     if ( g_sendActivateEvent != -1 )
1081     {
1082         bool activate = g_sendActivateEvent != 0;
1083
1084         // if (!activate) wxPrintf( wxT("de") );
1085         // wxPrintf( wxT("activate\n") );
1086
1087         // do it only once
1088         g_sendActivateEvent = -1;
1089
1090         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1091     }
1092 }
1093
1094 // ----------------------------------------------------------------------------
1095 // frame title/icon
1096 // ----------------------------------------------------------------------------
1097
1098 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1099 {
1100     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1101
1102     if ( title == m_title )
1103         return;
1104
1105     m_title = title;
1106
1107     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1108 }
1109
1110 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1111 {
1112     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1113
1114     wxTopLevelWindowBase::SetIcons( icons );
1115
1116     // Setting icons before window is realized can cause a GTK assertion if
1117     // another TLW is realized before this one, and it has this one as it's
1118     // transient parent. The life demo exibits this problem.
1119     if (GTK_WIDGET_REALIZED(m_widget))
1120     {
1121         GList* list = NULL;
1122         for (size_t i = icons.GetIconCount(); i--;)
1123             list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1124         gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1125         g_list_free(list);
1126     }
1127 }
1128
1129 // ----------------------------------------------------------------------------
1130 // frame state: maximized/iconized/normal
1131 // ----------------------------------------------------------------------------
1132
1133 void wxTopLevelWindowGTK::Maximize(bool maximize)
1134 {
1135     if (maximize)
1136         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1137     else
1138         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1139 }
1140
1141 bool wxTopLevelWindowGTK::IsMaximized() const
1142 {
1143     if(!m_widget->window)
1144         return false;
1145
1146     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1147 }
1148
1149 void wxTopLevelWindowGTK::Restore()
1150 {
1151     // "Present" seems similar enough to "restore"
1152     gtk_window_present( GTK_WINDOW( m_widget ) );
1153 }
1154
1155 void wxTopLevelWindowGTK::Iconize( bool iconize )
1156 {
1157     if (iconize)
1158         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1159     else
1160         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1161 }
1162
1163 bool wxTopLevelWindowGTK::IsIconized() const
1164 {
1165     return m_isIconized;
1166 }
1167
1168 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1169 {
1170     if ( iconize != m_isIconized )
1171     {
1172         m_isIconized = iconize;
1173         (void)SendIconizeEvent(iconize);
1174     }
1175 }
1176
1177 void wxTopLevelWindowGTK::AddGrab()
1178 {
1179     if (!m_grabbed)
1180     {
1181         m_grabbed = true;
1182         gtk_grab_add( m_widget );
1183         wxGUIEventLoop().Run();
1184         gtk_grab_remove( m_widget );
1185     }
1186 }
1187
1188 void wxTopLevelWindowGTK::RemoveGrab()
1189 {
1190     if (m_grabbed)
1191     {
1192         gtk_main_quit();
1193         m_grabbed = false;
1194     }
1195 }
1196
1197
1198 // helper
1199 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1200 {
1201     if (window)
1202     {
1203         if (region.IsEmpty())
1204         {
1205             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1206         }
1207         else
1208         {
1209             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1210             return true;
1211         }
1212     }
1213     return false;
1214 }
1215
1216
1217 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1218 {
1219     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1220                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1221
1222     if ( GTK_WIDGET_REALIZED(m_widget) )
1223     {
1224         if ( m_wxwindow )
1225             do_shape_combine_region(m_wxwindow->window, region);
1226
1227         return do_shape_combine_region(m_widget->window, region);
1228     }
1229     else // not realized yet
1230     {
1231         // store the shape to set, it will be really set once we're realized
1232         m_shape = region;
1233
1234         // we don't know if we're going to succeed or fail, be optimistic by
1235         // default
1236         return true;
1237     }
1238 }
1239
1240 bool wxTopLevelWindowGTK::IsActive()
1241 {
1242     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1243 }
1244
1245 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1246 {
1247     bool new_hint_value = false;
1248
1249     // FIXME: This is a workaround to focus handling problem
1250     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1251     // yet been processed, and the internal focus system is not up to date yet.
1252     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1253     ::wxYieldIfNeeded();
1254
1255     if(m_urgency_hint >= 0)
1256         g_source_remove(m_urgency_hint);
1257
1258     m_urgency_hint = -2;
1259
1260     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1261     {
1262         new_hint_value = true;
1263
1264         if (flags & wxUSER_ATTENTION_INFO)
1265         {
1266             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1267         } else {
1268             m_urgency_hint = -1;
1269         }
1270     }
1271
1272 #if GTK_CHECK_VERSION(2,7,0)
1273     if(!gtk_check_version(2,7,0))
1274         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1275     else
1276 #endif
1277         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1278 }
1279
1280 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1281 {
1282     // Store which styles were changed
1283     long styleChanges = style ^ m_windowStyle;
1284
1285     // Process wxWindow styles. This also updates the internal variable
1286     // Therefore m_windowStyle bits carry now the _new_ style values
1287     wxWindow::SetWindowStyleFlag(style);
1288
1289     // just return for now if widget does not exist yet
1290     if (!m_widget)
1291         return;
1292
1293     if ( styleChanges & wxSTAY_ON_TOP )
1294     {
1295         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1296                                   m_windowStyle & wxSTAY_ON_TOP);
1297     }
1298
1299     if ( styleChanges & wxFRAME_NO_TASKBAR )
1300     {
1301         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1302                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1303     }
1304 }
1305
1306 /* Get the X Window between child and the root window.
1307    This should usually be the WM managed XID */
1308 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1309 {
1310     Window root, parent;
1311     Window* children;
1312     unsigned int nchildren;
1313
1314     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1315     XFree(children);
1316
1317     while (parent != root) {
1318         child = parent;
1319         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1320         XFree(children);
1321     }
1322
1323     return child;
1324 }
1325
1326 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1327 {
1328     if (!m_widget || !m_widget->window)
1329         return false;
1330
1331     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1332     // We need to get the X Window that has the root window as the immediate parent
1333     // and m_widget->window as a child. This should be the X Window that the WM manages and
1334     // from which the opacity property is checked from.
1335     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1336
1337
1338     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1339     if (alpha == 0xff)
1340         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1341     else
1342     {
1343         long opacity = alpha * 0x1010101L;
1344         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1345                         XA_CARDINAL, 32, PropModeReplace,
1346                         (unsigned char *) &opacity, 1L);
1347     }
1348     XSync(dpy, False);
1349     return true;
1350 }
1351
1352 bool wxTopLevelWindowGTK::CanSetTransparent()
1353 {
1354     // allow to override automatic detection as it's far from perfect
1355     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1356     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1357     {
1358         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1359     }
1360
1361 #if GTK_CHECK_VERSION(2,10,0)
1362     if (!gtk_check_version(2,10,0))
1363     {
1364         return (gtk_widget_is_composited (m_widget));
1365     }
1366     else
1367 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1368     {
1369         return false;
1370     }
1371
1372 #if 0 // Don't be optimistic here for the sake of wxAUI
1373     int opcode, event, error;
1374     // Check for the existence of a RGBA visual instead?
1375     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1376                            "Composite", &opcode, &event, &error);
1377 #endif
1378 }