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