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     // reset the icon
 321     wxIconBundle iconsOld = win->GetIcons();
 322     if ( !iconsOld.IsEmpty() )
 323     {
 324         win->SetIcon( wxNullIcon );
 325         win->SetIcons( iconsOld );
 326     }
 327 }
 328 }
 329
 330 //-----------------------------------------------------------------------------
 331 // "map_event" from m_widget
 332 //-----------------------------------------------------------------------------
 333
 334 extern "C" {
 335 static gboolean
 336 gtk_frame_map_callback( GtkWidget*,
 337                         GdkEvent * WXUNUSED(event),
 338                         wxTopLevelWindow *win )
 339 {
 340     const bool wasIconized = win->IsIconized();
 341
 342     win->SetIconizeState(false);
 343
 344     if (wasIconized)
 345     {
 346         // Because GetClientSize() returns (0,0) when IsIconized() is true,
 347         // a size event must be generated, just in case GetClientSize() was
 348         // called while iconized. This specifically happens when restoring a
 349         // tlw that was "rolled up" with some WMs.
 350         // Queue a resize rather than sending size event directly to allow
 351         // children to be made visible first.
 352         win->m_oldClientWidth = 0;
 353         gtk_widget_queue_resize(win->m_wxwindow);
 354     }
 355
 356     return false;
 357 }
 358 }
 359
 360 //-----------------------------------------------------------------------------
 361 // "unmap_event" from m_widget
 362 //-----------------------------------------------------------------------------
 363
 364 extern "C" {
 365 static gboolean
 366 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
 367                           GdkEvent * WXUNUSED(event),
 368                           wxTopLevelWindow *win )
 369 {
 370     win->SetIconizeState(true);
 371     return false;
 372 }
 373 }
 374
 375 //-----------------------------------------------------------------------------
 376 // "property_notify_event" from m_widget
 377 //-----------------------------------------------------------------------------
 378
 379 extern "C" {
 380 static gboolean property_notify_event(
 381     GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
 382 {
 383     // Watch for changes to _NET_FRAME_EXTENTS property
 384     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 385     if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property)
 386     {
 387         Atom xproperty = gdk_x11_atom_to_xatom_for_display(
 388                             gdk_drawable_get_display(event->window), property);
 389         Atom type;
 390         int format;
 391         gulong nitems, bytes_after;
 392         guchar* data;
 393         Status status = XGetWindowProperty(
 394             gdk_x11_drawable_get_xdisplay(event->window),
 395             gdk_x11_drawable_get_xid(event->window),
 396             xproperty,
 397             0, 4, false, XA_CARDINAL,
 398             &type, &format, &nitems, &bytes_after, &data);
 399         if (status == Success && data && nitems == 4)
 400         {
 401             long* p = (long*)data;
 402             const wxSize decorSize =
 403                 wxSize(int(p[0] + p[1]), int(p[2] + p[3]));
 404             win->GTKUpdateDecorSize(decorSize);
 405         }
 406         if (data)
 407             XFree(data);
 408     }
 409     return false;
 410 }
 411 }
 412
 413 BEGIN_EVENT_TABLE(wxTopLevelWindowGTK, wxTopLevelWindowBase)
 414     EVT_SYS_COLOUR_CHANGED(wxTopLevelWindowGTK::OnSysColourChanged)
 415 END_EVENT_TABLE()
 416
 417 // ----------------------------------------------------------------------------
 418 // wxTopLevelWindowGTK creation
 419 // ----------------------------------------------------------------------------
 420
 421 void wxTopLevelWindowGTK::Init()
 422 {
 423     m_mainWidget = (GtkWidget*) NULL;
 424     m_isIconized = false;
 425     m_fsIsShowing = false;
 426     m_themeEnabled = true;
 427     m_gdkDecor = m_gdkFunc = 0;
 428     m_grabbed = false;
 429     m_deferShow = true;
 430
 431     m_urgency_hint = -2;
 432 }
 433
 434 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 435                                   wxWindowID id,
 436                                   const wxString& title,
 437                                   const wxPoint& pos,
 438                                   const wxSize& sizeOrig,
 439                                   long style,
 440                                   const wxString &name )
 441 {
 442     // always create a frame of some reasonable, even if arbitrary, size (at
 443     // least for MSW compatibility)
 444     wxSize size = sizeOrig;
 445     size.x = WidthDefault(size.x);
 446     size.y = HeightDefault(size.y);
 447
 448     wxTopLevelWindows.Append( this );
 449
 450     if (!PreCreation( parent, pos, size ) ||
 451         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 452     {
 453         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 454         return false;
 455     }
 456
 457     m_title = title;
 458
 459     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 460     //     e.g. in wxTaskBarIconAreaGTK
 461     if (m_widget == NULL)
 462     {
 463 #if wxUSE_LIBHILDON
 464         // we must create HildonWindow and not a normal GtkWindow as the latter
 465         // doesn't look correctly in Maemo environment and it must also be
 466         // registered with the main program object
 467         m_widget = hildon_window_new();
 468         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 469                                   HILDON_WINDOW(m_widget));
 470 #else // !wxUSE_LIBHILDON
 471         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 472         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 473         {
 474             // Tell WM that this is a dialog window and make it center
 475             // on parent by default (this is what GtkDialog ctor does):
 476             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 477                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 478             gtk_window_set_position(GTK_WINDOW(m_widget),
 479                                     GTK_WIN_POS_CENTER_ON_PARENT);
 480         }
 481         else
 482         {
 483             if (style & wxFRAME_TOOL_WINDOW)
 484             {
 485                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 486                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 487
 488                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 489                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 490                 // For consistency between WMs and with Windows, we
 491                 // should set the NO_TASKBAR flag which will apply
 492                 // the set_skip_taskbar_hint if it is available,
 493                 // ensuring no taskbar entry will appear.
 494                 style |= wxFRAME_NO_TASKBAR;
 495             }
 496         }
 497 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 498     }
 499
 500     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 501     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 502                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 503                        (style & wxFRAME_FLOAT_ON_PARENT)))
 504     {
 505         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 506                                       GTK_WINDOW(topParent->m_widget) );
 507     }
 508
 509     if (style & wxFRAME_NO_TASKBAR)
 510     {
 511         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 512     }
 513
 514     if (style & wxSTAY_ON_TOP)
 515     {
 516         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 517     }
 518
 519 #if 0
 520     if (!name.empty())
 521         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 522 #endif
 523
 524     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 525     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 526
 527     g_signal_connect (m_widget, "delete_event",
 528                       G_CALLBACK (gtk_frame_delete_callback), this);
 529
 530     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 531     m_mainWidget = gtk_vbox_new(false, 0);
 532     gtk_widget_show( m_mainWidget );
 533     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 534     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 535
 536     // m_wxwindow is the client area
 537     m_wxwindow = wxPizza::New();
 538     gtk_widget_show( m_wxwindow );
 539     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 540
 541     // we donm't allow the frame to get the focus as otherwise
 542     // the frame will grab it at arbitrary focus changes
 543     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 544
 545     if (m_parent) m_parent->AddChild( this );
 546
 547     g_signal_connect(m_wxwindow, "size_allocate",
 548         G_CALLBACK(size_allocate), this);
 549
 550     g_signal_connect (m_widget, "size_request",
 551                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 552     PostCreation();
 553
 554     if ((m_x != -1) || (m_y != -1))
 555         gtk_widget_set_uposition( m_widget, m_x, m_y );
 556
 557     //  we cannot set MWM hints and icons before the widget has
 558     //  been realized, so we do this directly after realization
 559     g_signal_connect (m_widget, "realize",
 560                       G_CALLBACK (gtk_frame_realized_callback), this);
 561
 562     // map and unmap for iconized state
 563     g_signal_connect (m_widget, "map_event",
 564                       G_CALLBACK (gtk_frame_map_callback), this);
 565     g_signal_connect (m_widget, "unmap_event",
 566                       G_CALLBACK (gtk_frame_unmap_callback), this);
 567
 568     // for wxMoveEvent
 569     g_signal_connect (m_widget, "configure_event",
 570                       G_CALLBACK (gtk_frame_configure_callback), this);
 571
 572     // activation
 573     g_signal_connect_after (m_widget, "focus_in_event",
 574                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 575     g_signal_connect_after (m_widget, "focus_out_event",
 576                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 577
 578     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 579     g_signal_connect(m_widget, "property_notify_event",
 580         G_CALLBACK(property_notify_event), this);
 581
 582     // decorations
 583     if ((style & wxSIMPLE_BORDER) || (style & wxNO_BORDER))
 584     {
 585         m_gdkDecor = 0;
 586         m_gdkFunc = 0;
 587     }
 588     else
 589     {
 590         m_gdkDecor = GDK_DECOR_BORDER;
 591         m_gdkFunc = GDK_FUNC_MOVE;
 592
 593         // All this is for Motif Window Manager "hints" and is supposed to be
 594         // recognized by other WMs as well.
 595         if ((style & wxCAPTION) != 0)
 596         {
 597             m_gdkDecor |= GDK_DECOR_TITLE;
 598         }
 599         if ((style & wxCLOSE_BOX) != 0)
 600         {
 601             m_gdkFunc |= GDK_FUNC_CLOSE;
 602         }
 603         if ((style & wxSYSTEM_MENU) != 0)
 604         {
 605             m_gdkDecor |= GDK_DECOR_MENU;
 606         }
 607         if ((style & wxMINIMIZE_BOX) != 0)
 608         {
 609             m_gdkFunc |= GDK_FUNC_MINIMIZE;
 610             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 611         }
 612         if ((style & wxMAXIMIZE_BOX) != 0)
 613         {
 614             m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 615             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 616         }
 617         if ((style & wxRESIZE_BORDER) != 0)
 618         {
 619            m_gdkFunc |= GDK_FUNC_RESIZE;
 620            m_gdkDecor |= GDK_DECOR_RESIZEH;
 621         }
 622     }
 623
 624     gtk_window_set_default_size(GTK_WINDOW(m_widget), m_width, m_height);
 625
 626     return true;
 627 }
 628
 629 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 630 {
 631 #if wxUSE_LIBHILDON
 632     // it can also be a (standard) dialog
 633     if ( HILDON_IS_WINDOW(m_widget) )
 634     {
 635         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 636                                      HILDON_WINDOW(m_widget));
 637     }
 638 #endif // wxUSE_LIBHILDON
 639
 640     if (m_grabbed)
 641     {
 642         wxFAIL_MSG(_T("Window still grabbed"));
 643         RemoveGrab();
 644     }
 645
 646     m_isBeingDeleted = true;
 647
 648     // it may also be GtkScrolledWindow in the case of an MDI child
 649     if (GTK_IS_WINDOW(m_widget))
 650     {
 651         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 652     }
 653
 654     if (g_activeFrame == this)
 655         g_activeFrame = NULL;
 656     if (g_lastActiveFrame == this)
 657         g_lastActiveFrame = NULL;
 658 }
 659
 660 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 661 {
 662     if (enable)
 663         m_gdkFunc |= GDK_FUNC_CLOSE;
 664     else
 665         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 666
 667     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 668         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 669
 670     return true;
 671 }
 672
 673 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 674 {
 675     if (show == m_fsIsShowing)
 676         return false; // return what?
 677
 678     m_fsIsShowing = show;
 679
 680     wxX11FullScreenMethod method =
 681         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 682                                  (WXWindow)GDK_ROOT_WINDOW());
 683
 684     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 685     //     to switch to fullscreen, which is not always available. We must
 686     //     check if WM supports the spec and use legacy methods if it
 687     //     doesn't.
 688     if ( method == wxX11_FS_WMSPEC )
 689     {
 690         if (show)
 691             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 692         else
 693             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 694     }
 695     else
 696     {
 697         GdkWindow *window = m_widget->window;
 698
 699         if (show)
 700         {
 701             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 702             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 703
 704             int screen_width,screen_height;
 705             wxDisplaySize( &screen_width, &screen_height );
 706
 707             gint client_x, client_y, root_x, root_y;
 708             gint width, height;
 709
 710             m_fsSaveGdkFunc = m_gdkFunc;
 711             m_fsSaveGdkDecor = m_gdkDecor;
 712             m_gdkFunc = m_gdkDecor = 0;
 713             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 714             gdk_window_set_functions(window, (GdkWMFunction)0);
 715
 716             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 717             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 718                          &width, &height, NULL);
 719
 720             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 721                         screen_width + 1, screen_height + 1);
 722
 723             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 724                                     (WXWindow)GDK_ROOT_WINDOW(),
 725                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 726                                     show, &m_fsSaveFrame, method);
 727         }
 728         else // hide
 729         {
 730             m_gdkFunc = m_fsSaveGdkFunc;
 731             m_gdkDecor = m_fsSaveGdkDecor;
 732             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 733             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 734
 735             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 736                                     (WXWindow)GDK_ROOT_WINDOW(),
 737                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 738                                     show, &m_fsSaveFrame, method);
 739
 740             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 741                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 742         }
 743     }
 744
 745     // documented behaviour is to show the window if it's still hidden when
 746     // showing it full screen
 747     if (show)
 748         Show();
 749
 750     return true;
 751 }
 752
 753 // ----------------------------------------------------------------------------
 754 // overridden wxWindow methods
 755 // ----------------------------------------------------------------------------
 756
 757 bool wxTopLevelWindowGTK::Show( bool show )
 758 {
 759     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 760
 761     const bool wasRealized = GTK_WIDGET_REALIZED(m_widget);
 762     bool deferShow =
 763         show && m_deferShow && !wasRealized &&
 764         g_signal_handler_find(m_widget,
 765             GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 766             g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
 767             0, NULL, NULL, this);
 768     if (deferShow)
 769     {
 770         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 771         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 772         // notification is received, so correct frame extents are known.
 773         // This allows resizing m_widget to keep the overall size in sync with
 774         // what wxWidgets expects it to be without an obvious change in the
 775         // window size immediately after it becomes visible.
 776
 777         // Realize m_widget, so m_widget->window can be used. Realizing causes
 778         // the widget tree to be size_allocated, which generates size events in
 779         // the wrong order. So temporarily remove child from m_widget while
 780         // realizing.
 781         GtkWidget* child = GTK_BIN(m_widget)->child;
 782         if (child)
 783         {
 784             g_object_ref(child);
 785             gtk_container_remove(GTK_CONTAINER(m_widget), child);
 786         }
 787         gtk_widget_realize(m_widget);
 788         if (child)
 789         {
 790             gtk_container_add(GTK_CONTAINER(m_widget), child);
 791             g_object_unref(child);
 792         }
 793
 794         m_deferShow =
 795         deferShow = gdk_x11_screen_supports_net_wm_hint(
 796             gdk_drawable_get_screen(m_widget->window),
 797             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)) != 0;
 798     }
 799     if (deferShow)
 800     {
 801         // send _NET_REQUEST_FRAME_EXTENTS
 802         XClientMessageEvent xevent;
 803         memset(&xevent, 0, sizeof(xevent));
 804         xevent.type = ClientMessage;
 805         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 806         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 807             gdk_drawable_get_display(m_widget->window),
 808             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 809         xevent.format = 32;
 810         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 811         XSendEvent(display, DefaultRootWindow(display), false,
 812             SubstructureNotifyMask | SubstructureRedirectMask,
 813             (XEvent*)&xevent);
 814
 815         // defer calling gtk_widget_show()
 816         m_isShown = true;
 817         return true;
 818     }
 819
 820     if (show && !wasRealized)
 821     {
 822         // size_allocate signals occur in reverse order (bottom to top).
 823         // Things work better if the initial wxSizeEvents are sent (from the
 824         // top down), before the initial size_allocate signals occur.
 825         wxSizeEvent event(GetSize(), GetId());
 826         event.SetEventObject(this);
 827         HandleWindowEvent(event);
 828     }
 829
 830     bool change = wxTopLevelWindowBase::Show(show);
 831
 832     if (change && !show)
 833     {
 834         // make sure window has a non-default position, so when it is shown
 835         // again, it won't be repositioned by WM as if it were a new window
 836         // Note that this must be done _after_ the window is hidden.
 837         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 838     }
 839
 840     return change;
 841 }
 842
 843 void wxTopLevelWindowGTK::Raise()
 844 {
 845     gtk_window_present( GTK_WINDOW( m_widget ) );
 846 }
 847
 848 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 849 {
 850     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 851 }
 852
 853 // ----------------------------------------------------------------------------
 854 // window geometry
 855 // ----------------------------------------------------------------------------
 856
 857 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 858 {
 859     wxSize size(m_width, m_height);
 860     size -= m_decorSize;
 861     if (size.x < 0) size.x = 0;
 862     if (size.y < 0) size.y = 0;
 863     if (width)  *width  = size.x;
 864     if (height) *height = size.y;
 865 }
 866
 867 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 868 {
 869     wxCHECK_RET( m_widget, wxT("invalid frame") );
 870
 871     // deal with the position first
 872     int old_x = m_x;
 873     int old_y = m_y;
 874
 875     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 876     {
 877         // -1 means "use existing" unless the flag above is specified
 878         if ( x != -1 )
 879             m_x = x;
 880         if ( y != -1 )
 881             m_y = y;
 882     }
 883     else // wxSIZE_ALLOW_MINUS_ONE
 884     {
 885         m_x = x;
 886         m_y = y;
 887     }
 888
 889     if ( m_x != old_x || m_y != old_y )
 890     {
 891         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 892     }
 893
 894     const wxSize oldSize(m_width, m_height);
 895     if (width >= 0)
 896         m_width = width;
 897     if (height >= 0)
 898         m_height = height;
 899     ConstrainSize();
 900     if (m_width != oldSize.x || m_height != oldSize.y)
 901     {
 902         int w, h;
 903         GTKDoGetSize(&w, &h);
 904         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 905
 906         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 907         wxSizeEvent event(GetSize(), GetId());
 908         event.SetEventObject(this);
 909         HandleWindowEvent(event);
 910     }
 911 }
 912
 913 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 914 {
 915     if (m_deferShow && !m_isShown)
 916         // Since client size is being explicitly set, don't change it later
 917         m_deferShow = false;
 918     wxTopLevelWindowBase::DoSetClientSize(width, height);
 919 }
 920
 921 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 922 {
 923     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 924
 925     if ( IsIconized() )
 926     {
 927         // for consistency with wxMSW, client area is supposed to be empty for
 928         // the iconized windows
 929         if ( width )
 930             *width = 0;
 931         if ( height )
 932             *height = 0;
 933     }
 934     else
 935     {
 936         GTKDoGetSize(width, height);
 937     }
 938 }
 939
 940 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 941                                           int maxW, int maxH,
 942                                           int incW, int incH )
 943 {
 944     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 945
 946     const wxSize minSize = GetMinSize();
 947     const wxSize maxSize = GetMaxSize();
 948     GdkGeometry hints;
 949     int hints_mask = 0;
 950     if (minSize.x > 0 || minSize.y > 0)
 951     {
 952         hints_mask |= GDK_HINT_MIN_SIZE;
 953         hints.min_width = minSize.x - m_decorSize.x;
 954         if (hints.min_width < 0)
 955             hints.min_width = 0;
 956         hints.min_height = minSize.y - m_decorSize.y;
 957         if (hints.min_height < 0)
 958             hints.min_height = 0;
 959     }
 960     if (maxSize.x > 0 || maxSize.y > 0)
 961     {
 962         hints_mask |= GDK_HINT_MAX_SIZE;
 963         hints.max_width = maxSize.x - m_decorSize.x;
 964         if (hints.max_width < 0)
 965             hints.max_width = INT_MAX;
 966         hints.max_height = maxSize.y - m_decorSize.y;
 967         if (hints.max_height < 0)
 968             hints.max_height = INT_MAX;
 969     }
 970     if (incW > 0 || incH > 0)
 971     {
 972         hints_mask |= GDK_HINT_RESIZE_INC;
 973         hints.width_inc  = incW > 0 ? incW : 1;
 974         hints.height_inc = incH > 0 ? incH : 1;
 975     }
 976     gtk_window_set_geometry_hints(
 977         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
 978 }
 979
 980 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
 981 {
 982     if (m_decorSize != decorSize)
 983     {
 984         const wxSize diff = decorSize - m_decorSize;
 985         m_decorSize = decorSize;
 986         bool resized = false;
 987         if (m_deferShow)
 988         {
 989             // keep overall size unchanged by shrinking m_widget
 990             int w, h;
 991             GTKDoGetSize(&w, &h);
 992             // but not if size would be less than minimum, it won't take effect
 993             const wxSize minSize = GetMinSize();
 994             if (w >= minSize.x && h >= minSize.y)
 995             {
 996                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 997                 resized = true;
 998             }
 999         }
1000         if (!resized)
1001         {
1002             // adjust overall size to match change in frame extents
1003             m_width  += diff.x;
1004             m_height += diff.y;
1005             if (m_width  < 0) m_width  = 0;
1006             if (m_height < 0) m_height = 0;
1007             if (!m_deferShow)
1008             {
1009                 m_oldClientWidth = 0;
1010                 gtk_widget_queue_resize(m_wxwindow);
1011             }
1012         }
1013     }
1014     if (m_deferShow)
1015     {
1016         // gtk_widget_show() was deferred, do it now
1017         m_deferShow = false;
1018         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1019         wxSizeEvent sizeEvent(GetSize(), GetId());
1020         sizeEvent.SetEventObject(this);
1021         HandleWindowEvent(sizeEvent);
1022
1023         gtk_widget_show(m_widget);
1024
1025         wxShowEvent showEvent(GetId(), true);
1026         showEvent.SetEventObject(this);
1027         HandleWindowEvent(showEvent);
1028     }
1029 }
1030
1031 void wxTopLevelWindowGTK::OnInternalIdle()
1032 {
1033     wxWindow::OnInternalIdle();
1034
1035     // Synthetize activate events.
1036     if ( g_sendActivateEvent != -1 )
1037     {
1038         bool activate = g_sendActivateEvent != 0;
1039
1040         // if (!activate) wxPrintf( wxT("de") );
1041         // wxPrintf( wxT("activate\n") );
1042
1043         // do it only once
1044         g_sendActivateEvent = -1;
1045
1046         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1047     }
1048 }
1049
1050 // ----------------------------------------------------------------------------
1051 // frame title/icon
1052 // ----------------------------------------------------------------------------
1053
1054 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1055 {
1056     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1057
1058     if ( title == m_title )
1059         return;
1060
1061     m_title = title;
1062
1063     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1064 }
1065
1066 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1067 {
1068     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1069
1070     wxTopLevelWindowBase::SetIcons( icons );
1071
1072     GList *list = NULL;
1073
1074     const size_t numIcons = icons.GetIconCount();
1075     for ( size_t i = 0; i < numIcons; i++ )
1076     {
1077         list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1078     }
1079
1080     gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1081     g_list_free(list);
1082 }
1083
1084 // ----------------------------------------------------------------------------
1085 // frame state: maximized/iconized/normal
1086 // ----------------------------------------------------------------------------
1087
1088 void wxTopLevelWindowGTK::Maximize(bool maximize)
1089 {
1090     if (maximize)
1091         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1092     else
1093         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1094 }
1095
1096 bool wxTopLevelWindowGTK::IsMaximized() const
1097 {
1098     if(!m_widget->window)
1099         return false;
1100
1101     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1102 }
1103
1104 void wxTopLevelWindowGTK::Restore()
1105 {
1106     // "Present" seems similar enough to "restore"
1107     gtk_window_present( GTK_WINDOW( m_widget ) );
1108 }
1109
1110 void wxTopLevelWindowGTK::Iconize( bool iconize )
1111 {
1112     if (iconize)
1113         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1114     else
1115         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1116 }
1117
1118 bool wxTopLevelWindowGTK::IsIconized() const
1119 {
1120     return m_isIconized;
1121 }
1122
1123 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1124 {
1125     if ( iconize != m_isIconized )
1126     {
1127         m_isIconized = iconize;
1128         (void)SendIconizeEvent(iconize);
1129     }
1130 }
1131
1132 void wxTopLevelWindowGTK::AddGrab()
1133 {
1134     if (!m_grabbed)
1135     {
1136         m_grabbed = true;
1137         gtk_grab_add( m_widget );
1138         wxGUIEventLoop().Run();
1139         gtk_grab_remove( m_widget );
1140     }
1141 }
1142
1143 void wxTopLevelWindowGTK::RemoveGrab()
1144 {
1145     if (m_grabbed)
1146     {
1147         gtk_main_quit();
1148         m_grabbed = false;
1149     }
1150 }
1151
1152
1153 // helper
1154 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1155 {
1156     if (window)
1157     {
1158         if (region.IsEmpty())
1159         {
1160             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1161         }
1162         else
1163         {
1164             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1165             return true;
1166         }
1167     }
1168     return false;
1169 }
1170
1171
1172 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1173 {
1174     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1175                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1176
1177     GdkWindow *window = NULL;
1178     if (m_wxwindow)
1179     {
1180         do_shape_combine_region(m_wxwindow->window, region);
1181     }
1182     window = m_widget->window;
1183     return do_shape_combine_region(window, region);
1184 }
1185
1186 bool wxTopLevelWindowGTK::IsActive()
1187 {
1188     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1189 }
1190
1191 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1192 {
1193     bool new_hint_value = false;
1194
1195     // FIXME: This is a workaround to focus handling problem
1196     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1197     // yet been processed, and the internal focus system is not up to date yet.
1198     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1199     ::wxYieldIfNeeded();
1200
1201     if(m_urgency_hint >= 0)
1202         g_source_remove(m_urgency_hint);
1203
1204     m_urgency_hint = -2;
1205
1206     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1207     {
1208         new_hint_value = true;
1209
1210         if (flags & wxUSER_ATTENTION_INFO)
1211         {
1212             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1213         } else {
1214             m_urgency_hint = -1;
1215         }
1216     }
1217
1218 #if GTK_CHECK_VERSION(2,7,0)
1219     if(!gtk_check_version(2,7,0))
1220         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1221     else
1222 #endif
1223         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1224 }
1225
1226 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1227 {
1228     // Store which styles were changed
1229     long styleChanges = style ^ m_windowStyle;
1230
1231     // Process wxWindow styles. This also updates the internal variable
1232     // Therefore m_windowStyle bits carry now the _new_ style values
1233     wxWindow::SetWindowStyleFlag(style);
1234
1235     // just return for now if widget does not exist yet
1236     if (!m_widget)
1237         return;
1238
1239     if ( styleChanges & wxSTAY_ON_TOP )
1240     {
1241         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1242                                   m_windowStyle & wxSTAY_ON_TOP);
1243     }
1244
1245     if ( styleChanges & wxFRAME_NO_TASKBAR )
1246     {
1247         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1248                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1249     }
1250 }
1251
1252 /* Get the X Window between child and the root window.
1253    This should usually be the WM managed XID */
1254 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1255 {
1256     Window root, parent;
1257     Window* children;
1258     unsigned int nchildren;
1259
1260     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1261     XFree(children);
1262
1263     while (parent != root) {
1264         child = parent;
1265         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1266         XFree(children);
1267     }
1268
1269     return child;
1270 }
1271
1272 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1273 {
1274     if (!m_widget || !m_widget->window)
1275         return false;
1276
1277     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1278     // We need to get the X Window that has the root window as the immediate parent
1279     // and m_widget->window as a child. This should be the X Window that the WM manages and
1280     // from which the opacity property is checked from.
1281     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1282
1283
1284     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1285     if (alpha == 0xff)
1286         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1287     else
1288     {
1289         long opacity = alpha * 0x1010101L;
1290         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1291                         XA_CARDINAL, 32, PropModeReplace,
1292                         (unsigned char *) &opacity, 1L);
1293     }
1294     XSync(dpy, False);
1295     return true;
1296 }
1297
1298 bool wxTopLevelWindowGTK::CanSetTransparent()
1299 {
1300     // allow to override automatic detection as it's far from perfect
1301     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1302     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1303     {
1304         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1305     }
1306
1307 #if GTK_CHECK_VERSION(2,10,0)
1308     if (!gtk_check_version(2,10,0))
1309     {
1310         return (gtk_widget_is_composited (m_widget));
1311     }
1312     else
1313 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1314     {
1315         return false;
1316     }
1317
1318 #if 0 // Don't be optimistic here for the sake of wxAUI
1319     int opcode, event, error;
1320     // Check for the existence of a RGBA visual instead?
1321     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1322                            "Composite", &opcode, &event, &error);
1323 #endif
1324 }
1325
1326 void wxTopLevelWindowGTK::OnSysColourChanged(wxSysColourChangedEvent& event)
1327 {
1328     // We don't know the order in which top-level windows will
1329     // be notified, so we need to clear the system objects
1330     // for each top-level window.
1331     extern void wxClearGtkSystemObjects();
1332     wxClearGtkSystemObjects();
1333
1334     // wxWindowBase::OnSysColourChanged will propagate event
1335     // to children
1336     event.Skip();
1337 }