src/gtk/toplevel.cpp

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