src/gtk/toplevel.cpp

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