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 = NULL;
  63 static wxTopLevelWindowGTK *g_lastActiveFrame = 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 = 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_deferShowAllowed = true;
 446     m_updateDecorSize = true;
 447
 448     m_urgency_hint = -2;
 449 }
 450
 451 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 452                                   wxWindowID id,
 453                                   const wxString& title,
 454                                   const wxPoint& pos,
 455                                   const wxSize& sizeOrig,
 456                                   long style,
 457                                   const wxString &name )
 458 {
 459     // always create a frame of some reasonable, even if arbitrary, size (at
 460     // least for MSW compatibility)
 461     wxSize size = sizeOrig;
 462     size.x = WidthDefault(size.x);
 463     size.y = HeightDefault(size.y);
 464
 465     wxTopLevelWindows.Append( this );
 466
 467     if (!PreCreation( parent, pos, size ) ||
 468         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 469     {
 470         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 471         return false;
 472     }
 473
 474     m_title = title;
 475
 476     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 477     //     e.g. in wxTaskBarIconAreaGTK
 478     if (m_widget == NULL)
 479     {
 480 #if wxUSE_LIBHILDON
 481         // we must create HildonWindow and not a normal GtkWindow as the latter
 482         // doesn't look correctly in Maemo environment and it must also be
 483         // registered with the main program object
 484         m_widget = hildon_window_new();
 485         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 486                                   HILDON_WINDOW(m_widget));
 487 #else // !wxUSE_LIBHILDON
 488         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 489         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 490         {
 491             // Tell WM that this is a dialog window and make it center
 492             // on parent by default (this is what GtkDialog ctor does):
 493             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 494                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 495             gtk_window_set_position(GTK_WINDOW(m_widget),
 496                                     GTK_WIN_POS_CENTER_ON_PARENT);
 497         }
 498         else
 499         {
 500             if (style & wxFRAME_TOOL_WINDOW)
 501             {
 502                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 503                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 504
 505                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 506                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 507                 // For consistency between WMs and with Windows, we
 508                 // should set the NO_TASKBAR flag which will apply
 509                 // the set_skip_taskbar_hint if it is available,
 510                 // ensuring no taskbar entry will appear.
 511                 style |= wxFRAME_NO_TASKBAR;
 512             }
 513         }
 514 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 515
 516         g_object_ref(m_widget);
 517     }
 518
 519     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 520     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 521                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 522                        (style & wxFRAME_FLOAT_ON_PARENT)))
 523     {
 524         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 525                                       GTK_WINDOW(topParent->m_widget) );
 526     }
 527
 528     if (style & wxFRAME_NO_TASKBAR)
 529     {
 530         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 531     }
 532
 533     if (style & wxSTAY_ON_TOP)
 534     {
 535         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 536     }
 537
 538 #if 0
 539     if (!name.empty())
 540         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 541 #endif
 542
 543     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 544     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 545
 546     g_signal_connect (m_widget, "delete_event",
 547                       G_CALLBACK (gtk_frame_delete_callback), this);
 548
 549     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 550     m_mainWidget = gtk_vbox_new(false, 0);
 551     gtk_widget_show( m_mainWidget );
 552     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 553     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 554
 555     // m_wxwindow is the client area
 556     m_wxwindow = wxPizza::New(0,this);
 557     gtk_widget_show( m_wxwindow );
 558     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 559
 560     // we donm't allow the frame to get the focus as otherwise
 561     // the frame will grab it at arbitrary focus changes
 562     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 563
 564     if (m_parent) m_parent->AddChild( this );
 565
 566     g_signal_connect(m_wxwindow, "size_allocate",
 567         G_CALLBACK(size_allocate), this);
 568
 569     g_signal_connect (m_widget, "size_request",
 570                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 571     PostCreation();
 572
 573     if ((m_x != -1) || (m_y != -1))
 574         gtk_widget_set_uposition( m_widget, m_x, m_y );
 575
 576     //  we cannot set MWM hints and icons before the widget has
 577     //  been realized, so we do this directly after realization
 578     g_signal_connect (m_widget, "realize",
 579                       G_CALLBACK (gtk_frame_realized_callback), this);
 580
 581     // map and unmap for iconized state
 582     g_signal_connect (m_widget, "map_event",
 583                       G_CALLBACK (gtk_frame_map_callback), this);
 584     g_signal_connect (m_widget, "unmap_event",
 585                       G_CALLBACK (gtk_frame_unmap_callback), this);
 586
 587     // for wxMoveEvent
 588     g_signal_connect (m_widget, "configure_event",
 589                       G_CALLBACK (gtk_frame_configure_callback), this);
 590
 591     // activation
 592     g_signal_connect_after (m_widget, "focus_in_event",
 593                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 594     g_signal_connect_after (m_widget, "focus_out_event",
 595                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 596
 597     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 598     g_signal_connect(m_widget, "property_notify_event",
 599         G_CALLBACK(property_notify_event), this);
 600
 601     // translate wx decorations styles into Motif WM hints (they are recognized
 602     // by other WMs as well)
 603
 604     // always enable moving the window as we have no separate flag for enabling
 605     // it
 606     m_gdkFunc = GDK_FUNC_MOVE;
 607
 608     if ( style & wxCLOSE_BOX )
 609         m_gdkFunc |= GDK_FUNC_CLOSE;
 610
 611     if ( style & wxMINIMIZE_BOX )
 612         m_gdkFunc |= GDK_FUNC_MINIMIZE;
 613
 614     if ( style & wxMAXIMIZE_BOX )
 615         m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 616
 617     if ( (style & wxSIMPLE_BORDER) || (style & wxNO_BORDER) )
 618     {
 619         m_gdkDecor = 0;
 620     }
 621     else // have border
 622     {
 623         m_gdkDecor = GDK_DECOR_BORDER;
 624
 625         if ( style & wxCAPTION )
 626             m_gdkDecor |= GDK_DECOR_TITLE;
 627
 628         if ( style & wxSYSTEM_MENU )
 629             m_gdkDecor |= GDK_DECOR_MENU;
 630
 631         if ( style & wxMINIMIZE_BOX )
 632             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 633
 634         if ( style & wxMAXIMIZE_BOX )
 635             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 636
 637         if ( style & wxRESIZE_BORDER )
 638         {
 639            m_gdkFunc |= GDK_FUNC_RESIZE;
 640            m_gdkDecor |= GDK_DECOR_RESIZEH;
 641         }
 642     }
 643
 644     m_decorSize = GetCachedDecorSize();
 645     int w, h;
 646     GTKDoGetSize(&w, &h);
 647     gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
 648
 649     return true;
 650 }
 651
 652 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 653 {
 654 #if wxUSE_LIBHILDON
 655     // it can also be a (standard) dialog
 656     if ( HILDON_IS_WINDOW(m_widget) )
 657     {
 658         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 659                                      HILDON_WINDOW(m_widget));
 660     }
 661 #endif // wxUSE_LIBHILDON
 662
 663     if (m_grabbed)
 664     {
 665         wxFAIL_MSG(_T("Window still grabbed"));
 666         RemoveGrab();
 667     }
 668
 669     SendDestroyEvent();
 670
 671     // it may also be GtkScrolledWindow in the case of an MDI child
 672     if (GTK_IS_WINDOW(m_widget))
 673     {
 674         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 675     }
 676
 677     if (g_activeFrame == this)
 678         g_activeFrame = NULL;
 679     if (g_lastActiveFrame == this)
 680         g_lastActiveFrame = NULL;
 681 }
 682
 683 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 684 {
 685     if (enable)
 686         m_gdkFunc |= GDK_FUNC_CLOSE;
 687     else
 688         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 689
 690     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 691         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 692
 693     return true;
 694 }
 695
 696 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 697 {
 698     if (show == m_fsIsShowing)
 699         return false; // return what?
 700
 701     m_fsIsShowing = show;
 702
 703     wxX11FullScreenMethod method =
 704         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 705                                  (WXWindow)GDK_ROOT_WINDOW());
 706
 707     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 708     //     to switch to fullscreen, which is not always available. We must
 709     //     check if WM supports the spec and use legacy methods if it
 710     //     doesn't.
 711     if ( method == wxX11_FS_WMSPEC )
 712     {
 713         if (show)
 714             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 715         else
 716             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 717     }
 718     else
 719     {
 720         GdkWindow *window = m_widget->window;
 721
 722         if (show)
 723         {
 724             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 725             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 726
 727             int screen_width,screen_height;
 728             wxDisplaySize( &screen_width, &screen_height );
 729
 730             gint client_x, client_y, root_x, root_y;
 731             gint width, height;
 732
 733             m_fsSaveGdkFunc = m_gdkFunc;
 734             m_fsSaveGdkDecor = m_gdkDecor;
 735             m_gdkFunc = m_gdkDecor = 0;
 736             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 737             gdk_window_set_functions(window, (GdkWMFunction)0);
 738
 739             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 740             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 741                          &width, &height, NULL);
 742
 743             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 744                         screen_width + 1, screen_height + 1);
 745
 746             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 747                                     (WXWindow)GDK_ROOT_WINDOW(),
 748                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 749                                     show, &m_fsSaveFrame, method);
 750         }
 751         else // hide
 752         {
 753             m_gdkFunc = m_fsSaveGdkFunc;
 754             m_gdkDecor = m_fsSaveGdkDecor;
 755             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 756             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 757
 758             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 759                                     (WXWindow)GDK_ROOT_WINDOW(),
 760                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 761                                     show, &m_fsSaveFrame, method);
 762
 763             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 764                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 765         }
 766     }
 767
 768     // documented behaviour is to show the window if it's still hidden when
 769     // showing it full screen
 770     if (show)
 771         Show();
 772
 773     return true;
 774 }
 775
 776 // ----------------------------------------------------------------------------
 777 // overridden wxWindow methods
 778 // ----------------------------------------------------------------------------
 779
 780 bool wxTopLevelWindowGTK::Show( bool show )
 781 {
 782     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 783
 784     bool deferShow = show && !m_isShown && m_deferShow && m_deferShowAllowed;
 785     if (deferShow)
 786     {
 787         deferShow = false;
 788         if (!GTK_WIDGET_REALIZED(m_widget) &&
 789             g_signal_handler_find(m_widget,
 790                 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 791                 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
 792                 0, NULL, NULL, this))
 793         {
 794             if (gdk_x11_screen_supports_net_wm_hint(
 795                 gtk_widget_get_screen(m_widget),
 796                 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)))
 797             {
 798                 deferShow = true;
 799             }
 800             else
 801             {
 802                 // Don't allow changes to m_decorSize, it breaks saving/restoring
 803                 // window size with GetSize()/SetSize() because it makes window
 804                 // bigger between each restore and save.
 805                 m_updateDecorSize = false;
 806             }
 807         }
 808         m_deferShow = deferShow;
 809     }
 810     if (deferShow)
 811     {
 812         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 813         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 814         // notification is received, so correct frame extents are known.
 815         // This allows resizing m_widget to keep the overall size in sync with
 816         // what wxWidgets expects it to be without an obvious change in the
 817         // window size immediately after it becomes visible.
 818
 819         // Realize m_widget, so m_widget->window can be used. Realizing normally
 820         // causes the widget tree to be size_allocated, which generates size
 821         // events in the wrong order. However, the size_allocates will not be
 822         // done if the allocation is not the default (1,1).
 823         const int alloc_width = m_widget->allocation.width;
 824         if (alloc_width == 1)
 825             m_widget->allocation.width = 2;
 826         gtk_widget_realize(m_widget);
 827         if (alloc_width == 1)
 828             m_widget->allocation.width = 1;
 829
 830         // send _NET_REQUEST_FRAME_EXTENTS
 831         XClientMessageEvent xevent;
 832         memset(&xevent, 0, sizeof(xevent));
 833         xevent.type = ClientMessage;
 834         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 835         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 836             gdk_drawable_get_display(m_widget->window),
 837             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 838         xevent.format = 32;
 839         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 840         XSendEvent(display, DefaultRootWindow(display), false,
 841             SubstructureNotifyMask | SubstructureRedirectMask,
 842             (XEvent*)&xevent);
 843
 844         // defer calling gtk_widget_show()
 845         m_isShown = true;
 846         return true;
 847     }
 848
 849     if (show && !GTK_WIDGET_REALIZED(m_widget))
 850     {
 851         // size_allocate signals occur in reverse order (bottom to top).
 852         // Things work better if the initial wxSizeEvents are sent (from the
 853         // top down), before the initial size_allocate signals occur.
 854         wxSizeEvent event(GetSize(), GetId());
 855         event.SetEventObject(this);
 856         HandleWindowEvent(event);
 857     }
 858
 859     bool change = wxTopLevelWindowBase::Show(show);
 860
 861     if (change && !show)
 862     {
 863         // make sure window has a non-default position, so when it is shown
 864         // again, it won't be repositioned by WM as if it were a new window
 865         // Note that this must be done _after_ the window is hidden.
 866         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 867     }
 868
 869     return change;
 870 }
 871
 872 void wxTopLevelWindowGTK::Raise()
 873 {
 874     gtk_window_present( GTK_WINDOW( m_widget ) );
 875 }
 876
 877 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 878 {
 879     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 880 }
 881
 882 // ----------------------------------------------------------------------------
 883 // window geometry
 884 // ----------------------------------------------------------------------------
 885
 886 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 887 {
 888     wxSize size(m_width, m_height);
 889     size -= m_decorSize;
 890     if (size.x < 0) size.x = 0;
 891     if (size.y < 0) size.y = 0;
 892     if (width)  *width  = size.x;
 893     if (height) *height = size.y;
 894 }
 895
 896 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 897 {
 898     wxCHECK_RET( m_widget, wxT("invalid frame") );
 899
 900     m_deferShowAllowed = true;
 901
 902     // deal with the position first
 903     int old_x = m_x;
 904     int old_y = m_y;
 905
 906     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 907     {
 908         // -1 means "use existing" unless the flag above is specified
 909         if ( x != -1 )
 910             m_x = x;
 911         if ( y != -1 )
 912             m_y = y;
 913     }
 914     else // wxSIZE_ALLOW_MINUS_ONE
 915     {
 916         m_x = x;
 917         m_y = y;
 918     }
 919
 920     if ( m_x != old_x || m_y != old_y )
 921     {
 922         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 923     }
 924
 925     const wxSize oldSize(m_width, m_height);
 926     if (width >= 0)
 927         m_width = width;
 928     if (height >= 0)
 929         m_height = height;
 930     ConstrainSize();
 931     if (m_width != oldSize.x || m_height != oldSize.y)
 932     {
 933         int w, h;
 934         GTKDoGetSize(&w, &h);
 935         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 936
 937         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 938         wxSizeEvent event(GetSize(), GetId());
 939         event.SetEventObject(this);
 940         HandleWindowEvent(event);
 941     }
 942 }
 943
 944 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 945 {
 946     // Since client size is being explicitly set, don't change it later
 947     m_deferShowAllowed = false;
 948
 949     wxTopLevelWindowBase::DoSetClientSize(width, height);
 950 }
 951
 952 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 953 {
 954     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 955
 956     if ( IsIconized() )
 957     {
 958         // for consistency with wxMSW, client area is supposed to be empty for
 959         // the iconized windows
 960         if ( width )
 961             *width = 0;
 962         if ( height )
 963             *height = 0;
 964     }
 965     else
 966     {
 967         GTKDoGetSize(width, height);
 968     }
 969 }
 970
 971 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 972                                           int maxW, int maxH,
 973                                           int incW, int incH )
 974 {
 975     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 976
 977     const wxSize minSize = GetMinSize();
 978     const wxSize maxSize = GetMaxSize();
 979     GdkGeometry hints;
 980     int hints_mask = 0;
 981     if (minSize.x > 0 || minSize.y > 0)
 982     {
 983         hints_mask |= GDK_HINT_MIN_SIZE;
 984         hints.min_width = minSize.x - m_decorSize.x;
 985         if (hints.min_width < 0)
 986             hints.min_width = 0;
 987         hints.min_height = minSize.y - m_decorSize.y;
 988         if (hints.min_height < 0)
 989             hints.min_height = 0;
 990     }
 991     if (maxSize.x > 0 || maxSize.y > 0)
 992     {
 993         hints_mask |= GDK_HINT_MAX_SIZE;
 994         hints.max_width = maxSize.x - m_decorSize.x;
 995         if (hints.max_width < 0)
 996             hints.max_width = INT_MAX;
 997         hints.max_height = maxSize.y - m_decorSize.y;
 998         if (hints.max_height < 0)
 999             hints.max_height = INT_MAX;
1000     }
1001     if (incW > 0 || incH > 0)
1002     {
1003         hints_mask |= GDK_HINT_RESIZE_INC;
1004         hints.width_inc  = incW > 0 ? incW : 1;
1005         hints.height_inc = incH > 0 ? incH : 1;
1006     }
1007     gtk_window_set_geometry_hints(
1008         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
1009 }
1010
1011 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
1012 {
1013     if (!IsMaximized() && !IsFullScreen())
1014         GetCachedDecorSize() = decorSize;
1015     if (m_updateDecorSize && m_decorSize != decorSize)
1016     {
1017         const wxSize diff = decorSize - m_decorSize;
1018         m_decorSize = decorSize;
1019         bool resized = false;
1020         if (m_deferShow)
1021         {
1022             // keep overall size unchanged by shrinking m_widget
1023             int w, h;
1024             GTKDoGetSize(&w, &h);
1025             // but not if size would be less than minimum, it won't take effect
1026             const wxSize minSize = GetMinSize();
1027             if (w >= minSize.x && h >= minSize.y)
1028             {
1029                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
1030                 resized = true;
1031             }
1032         }
1033         if (!resized)
1034         {
1035             // adjust overall size to match change in frame extents
1036             m_width  += diff.x;
1037             m_height += diff.y;
1038             if (m_width  < 0) m_width  = 0;
1039             if (m_height < 0) m_height = 0;
1040             m_oldClientWidth = 0;
1041             gtk_widget_queue_resize(m_wxwindow);
1042         }
1043     }
1044     if (m_deferShow)
1045     {
1046         // gtk_widget_show() was deferred, do it now
1047         m_deferShow = false;
1048         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1049         wxSizeEvent sizeEvent(GetSize(), GetId());
1050         sizeEvent.SetEventObject(this);
1051         HandleWindowEvent(sizeEvent);
1052
1053         gtk_widget_show(m_widget);
1054
1055         wxShowEvent showEvent(GetId(), true);
1056         showEvent.SetEventObject(this);
1057         HandleWindowEvent(showEvent);
1058     }
1059 }
1060
1061 wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
1062 {
1063     static wxSize size[8];
1064
1065     int index = 0;
1066     // title bar
1067     if (m_gdkDecor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
1068         index = 1;
1069     // border
1070     if (m_gdkDecor & GDK_DECOR_BORDER)
1071         index |= 2;
1072     // utility window decor can be different
1073     if (m_windowStyle & wxFRAME_TOOL_WINDOW)
1074         index |= 4;
1075     return size[index];
1076 }
1077
1078 void wxTopLevelWindowGTK::OnInternalIdle()
1079 {
1080     wxWindow::OnInternalIdle();
1081
1082     // Synthetize activate events.
1083     if ( g_sendActivateEvent != -1 )
1084     {
1085         bool activate = g_sendActivateEvent != 0;
1086
1087         // if (!activate) wxPrintf( wxT("de") );
1088         // wxPrintf( wxT("activate\n") );
1089
1090         // do it only once
1091         g_sendActivateEvent = -1;
1092
1093         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1094     }
1095 }
1096
1097 // ----------------------------------------------------------------------------
1098 // frame title/icon
1099 // ----------------------------------------------------------------------------
1100
1101 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1102 {
1103     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1104
1105     if ( title == m_title )
1106         return;
1107
1108     m_title = title;
1109
1110     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1111 }
1112
1113 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1114 {
1115     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1116
1117     wxTopLevelWindowBase::SetIcons( icons );
1118
1119     // Setting icons before window is realized can cause a GTK assertion if
1120     // another TLW is realized before this one, and it has this one as it's
1121     // transient parent. The life demo exibits this problem.
1122     if (GTK_WIDGET_REALIZED(m_widget))
1123     {
1124         GList* list = NULL;
1125         for (size_t i = icons.GetIconCount(); i--;)
1126             list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1127         gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1128         g_list_free(list);
1129     }
1130 }
1131
1132 // ----------------------------------------------------------------------------
1133 // frame state: maximized/iconized/normal
1134 // ----------------------------------------------------------------------------
1135
1136 void wxTopLevelWindowGTK::Maximize(bool maximize)
1137 {
1138     if (maximize)
1139         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1140     else
1141         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1142 }
1143
1144 bool wxTopLevelWindowGTK::IsMaximized() const
1145 {
1146     if(!m_widget->window)
1147         return false;
1148
1149     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1150 }
1151
1152 void wxTopLevelWindowGTK::Restore()
1153 {
1154     // "Present" seems similar enough to "restore"
1155     gtk_window_present( GTK_WINDOW( m_widget ) );
1156 }
1157
1158 void wxTopLevelWindowGTK::Iconize( bool iconize )
1159 {
1160     if (iconize)
1161         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1162     else
1163         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1164 }
1165
1166 bool wxTopLevelWindowGTK::IsIconized() const
1167 {
1168     return m_isIconized;
1169 }
1170
1171 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1172 {
1173     if ( iconize != m_isIconized )
1174     {
1175         m_isIconized = iconize;
1176         (void)SendIconizeEvent(iconize);
1177     }
1178 }
1179
1180 void wxTopLevelWindowGTK::AddGrab()
1181 {
1182     if (!m_grabbed)
1183     {
1184         m_grabbed = true;
1185         gtk_grab_add( m_widget );
1186         wxGUIEventLoop().Run();
1187         gtk_grab_remove( m_widget );
1188     }
1189 }
1190
1191 void wxTopLevelWindowGTK::RemoveGrab()
1192 {
1193     if (m_grabbed)
1194     {
1195         gtk_main_quit();
1196         m_grabbed = false;
1197     }
1198 }
1199
1200
1201 // helper
1202 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1203 {
1204     if (window)
1205     {
1206         if (region.IsEmpty())
1207         {
1208             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1209         }
1210         else
1211         {
1212             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1213             return true;
1214         }
1215     }
1216     return false;
1217 }
1218
1219
1220 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1221 {
1222     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1223                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1224
1225     if ( GTK_WIDGET_REALIZED(m_widget) )
1226     {
1227         if ( m_wxwindow )
1228             do_shape_combine_region(m_wxwindow->window, region);
1229
1230         return do_shape_combine_region(m_widget->window, region);
1231     }
1232     else // not realized yet
1233     {
1234         // store the shape to set, it will be really set once we're realized
1235         m_shape = region;
1236
1237         // we don't know if we're going to succeed or fail, be optimistic by
1238         // default
1239         return true;
1240     }
1241 }
1242
1243 bool wxTopLevelWindowGTK::IsActive()
1244 {
1245     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1246 }
1247
1248 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1249 {
1250     bool new_hint_value = false;
1251
1252     // FIXME: This is a workaround to focus handling problem
1253     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle
1254     // hasn't yet been processed, and the internal focus system is not up to date yet.
1255     // YieldFor(wxEVT_CATEGORY_UI) ensures the processing of it (hopefully it
1256     // won't have side effects) - MR
1257     wxEventLoopBase::GetActive()->YieldFor(wxEVT_CATEGORY_UI);
1258
1259     if(m_urgency_hint >= 0)
1260         g_source_remove(m_urgency_hint);
1261
1262     m_urgency_hint = -2;
1263
1264     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1265     {
1266         new_hint_value = true;
1267
1268         if (flags & wxUSER_ATTENTION_INFO)
1269         {
1270             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1271         } else {
1272             m_urgency_hint = -1;
1273         }
1274     }
1275
1276 #if GTK_CHECK_VERSION(2,7,0)
1277     if(!gtk_check_version(2,7,0))
1278         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1279     else
1280 #endif
1281         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1282 }
1283
1284 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1285 {
1286     // Store which styles were changed
1287     long styleChanges = style ^ m_windowStyle;
1288
1289     // Process wxWindow styles. This also updates the internal variable
1290     // Therefore m_windowStyle bits carry now the _new_ style values
1291     wxWindow::SetWindowStyleFlag(style);
1292
1293     // just return for now if widget does not exist yet
1294     if (!m_widget)
1295         return;
1296
1297     if ( styleChanges & wxSTAY_ON_TOP )
1298     {
1299         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1300                                   m_windowStyle & wxSTAY_ON_TOP);
1301     }
1302
1303     if ( styleChanges & wxFRAME_NO_TASKBAR )
1304     {
1305         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1306                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1307     }
1308 }
1309
1310 /* Get the X Window between child and the root window.
1311    This should usually be the WM managed XID */
1312 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1313 {
1314     Window root, parent;
1315     Window* children;
1316     unsigned int nchildren;
1317
1318     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1319     XFree(children);
1320
1321     while (parent != root) {
1322         child = parent;
1323         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1324         XFree(children);
1325     }
1326
1327     return child;
1328 }
1329
1330 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1331 {
1332     if (!m_widget || !m_widget->window)
1333         return false;
1334
1335     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1336     // We need to get the X Window that has the root window as the immediate parent
1337     // and m_widget->window as a child. This should be the X Window that the WM manages and
1338     // from which the opacity property is checked from.
1339     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1340
1341
1342     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1343     if (alpha == 0xff)
1344         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1345     else
1346     {
1347         long opacity = alpha * 0x1010101L;
1348         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1349                         XA_CARDINAL, 32, PropModeReplace,
1350                         (unsigned char *) &opacity, 1L);
1351     }
1352     XSync(dpy, False);
1353     return true;
1354 }
1355
1356 bool wxTopLevelWindowGTK::CanSetTransparent()
1357 {
1358     // allow to override automatic detection as it's far from perfect
1359     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1360     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1361     {
1362         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1363     }
1364
1365 #if GTK_CHECK_VERSION(2,10,0)
1366     if (!gtk_check_version(2,10,0))
1367     {
1368         return (gtk_widget_is_composited (m_widget));
1369     }
1370     else
1371 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1372     {
1373         return false;
1374     }
1375
1376 #if 0 // Don't be optimistic here for the sake of wxAUI
1377     int opcode, event, error;
1378     // Check for the existence of a RGBA visual instead?
1379     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1380                            "Composite", &opcode, &event, &error);
1381 #endif
1382 }