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