src/gtk/toplevel.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/toplevel.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 #ifdef __VMS
  22 #define XIconifyWindow XICONIFYWINDOW
  23 #endif
  24
  25 #include "wx/toplevel.h"
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/frame.h"
  29     #include "wx/icon.h"
  30     #include "wx/log.h"
  31     #include "wx/app.h"
  32 #endif
  33
  34 #include "wx/gtk/private.h"
  35 #include "wx/evtloop.h"
  36 #include "wx/sysopt.h"
  37
  38 #include <gtk/gtk.h>
  39 #include <gdk/gdkx.h>
  40
  41 #include "wx/gtk/private/win_gtk.h"
  42
  43 #include "wx/unix/utilsx11.h"
  44
  45 // XA_CARDINAL
  46 #include <X11/Xatom.h>
  47
  48 #if wxUSE_LIBHILDON
  49     #include <hildon-widgets/hildon-program.h>
  50     #include <hildon-widgets/hildon-window.h>
  51 #endif // wxUSE_LIBHILDON
  52
  53 // ----------------------------------------------------------------------------
  54 // data
  55 // ----------------------------------------------------------------------------
  56
  57 // this is incremented while a modal dialog is shown
  58 int wxOpenModalDialogsCount = 0;
  59
  60 // the frame that is currently active (i.e. its child has focus). It is
  61 // used to generate wxActivateEvents
  62 static wxTopLevelWindowGTK *g_activeFrame = (wxTopLevelWindowGTK*) NULL;
  63 static wxTopLevelWindowGTK *g_lastActiveFrame = (wxTopLevelWindowGTK*) NULL;
  64
  65 // if we detect that the app has got/lost the focus, we set this variable to
  66 // either TRUE or FALSE and an activate event will be sent during the next
  67 // OnIdle() call and it is reset to -1: this value means that we shouldn't
  68 // send any activate events at all
  69 static int g_sendActivateEvent = -1;
  70
  71 //-----------------------------------------------------------------------------
  72 // RequestUserAttention related functions
  73 //-----------------------------------------------------------------------------
  74
  75 extern "C" {
  76 static void wxgtk_window_set_urgency_hint (GtkWindow *win,
  77                                            gboolean setting)
  78 {
  79     wxASSERT_MSG( GTK_WIDGET_REALIZED(win), wxT("wxgtk_window_set_urgency_hint: GdkWindow not realized") );
  80     GdkWindow *window = GTK_WIDGET(win)->window;
  81     XWMHints *wm_hints;
  82
  83     wm_hints = XGetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window));
  84
  85     if (!wm_hints)
  86         wm_hints = XAllocWMHints();
  87
  88     if (setting)
  89         wm_hints->flags |= XUrgencyHint;
  90     else
  91         wm_hints->flags &= ~XUrgencyHint;
  92
  93     XSetWMHints(GDK_WINDOW_XDISPLAY(window), GDK_WINDOW_XWINDOW(window), wm_hints);
  94     XFree(wm_hints);
  95 }
  96
  97 static gboolean gtk_frame_urgency_timer_callback( wxTopLevelWindowGTK *win )
  98 {
  99 #if GTK_CHECK_VERSION(2,7,0)
 100     if(!gtk_check_version(2,7,0))
 101         gtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 102     else
 103 #endif
 104         wxgtk_window_set_urgency_hint(GTK_WINDOW( win->m_widget ), FALSE);
 105
 106     win->m_urgency_hint = -2;
 107     return FALSE;
 108 }
 109 }
 110
 111 //-----------------------------------------------------------------------------
 112 // "focus_in_event"
 113 //-----------------------------------------------------------------------------
 114
 115 extern "C" {
 116 static gboolean gtk_frame_focus_in_callback( GtkWidget *widget,
 117                                          GdkEvent *WXUNUSED(event),
 118                                          wxTopLevelWindowGTK *win )
 119 {
 120     switch ( g_sendActivateEvent )
 121     {
 122         case -1:
 123             // we've got focus from outside, synthetize wxActivateEvent
 124             g_sendActivateEvent = 1;
 125             break;
 126
 127         case 0:
 128             // another our window just lost focus, it was already ours before
 129             // - don't send any wxActivateEvent
 130             g_sendActivateEvent = -1;
 131             break;
 132     }
 133
 134     g_activeFrame = win;
 135     g_lastActiveFrame = g_activeFrame;
 136
 137     // wxPrintf( wxT("active: %s\n"), win->GetTitle().c_str() );
 138
 139     // MR: wxRequestUserAttention related block
 140     switch( win->m_urgency_hint )
 141     {
 142         default:
 143             g_source_remove( win->m_urgency_hint );
 144             // no break, fallthrough to remove hint too
 145         case -1:
 146 #if GTK_CHECK_VERSION(2,7,0)
 147             if(!gtk_check_version(2,7,0))
 148                 gtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 149             else
 150 #endif
 151             {
 152                 wxgtk_window_set_urgency_hint(GTK_WINDOW( widget ), FALSE);
 153             }
 154
 155             win->m_urgency_hint = -2;
 156             break;
 157
 158         case -2: break;
 159     }
 160
 161     wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 162     wxActivateEvent event(wxEVT_ACTIVATE, true, g_activeFrame->GetId());
 163     event.SetEventObject(g_activeFrame);
 164     g_activeFrame->HandleWindowEvent(event);
 165
 166     return FALSE;
 167 }
 168 }
 169
 170 //-----------------------------------------------------------------------------
 171 // "focus_out_event"
 172 //-----------------------------------------------------------------------------
 173
 174 extern "C" {
 175 static
 176 gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
 177                                       GdkEventFocus *WXUNUSED(gdk_event),
 178                                       wxTopLevelWindowGTK * WXUNUSED(win))
 179 {
 180     // if the focus goes out of our app alltogether, OnIdle() will send
 181     // wxActivateEvent, otherwise gtk_window_focus_in_callback() will reset
 182     // g_sendActivateEvent to -1
 183     g_sendActivateEvent = 0;
 184
 185     // wxASSERT_MSG( (g_activeFrame == win), wxT("TLW deactivatd although it wasn't active") );
 186
 187     // wxPrintf( wxT("inactive: %s\n"), win->GetTitle().c_str() );
 188
 189     if (g_activeFrame)
 190     {
 191         wxLogTrace(wxT("activate"), wxT("Activating frame %p (from focus_in)"), g_activeFrame);
 192         wxActivateEvent event(wxEVT_ACTIVATE, false, g_activeFrame->GetId());
 193         event.SetEventObject(g_activeFrame);
 194         g_activeFrame->HandleWindowEvent(event);
 195
 196         g_activeFrame = NULL;
 197     }
 198
 199     return FALSE;
 200 }
 201 }
 202
 203 //-----------------------------------------------------------------------------
 204 // "size_allocate" from m_wxwindow
 205 //-----------------------------------------------------------------------------
 206
 207 extern "C" {
 208 static void
 209 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
 210 {
 211     if (win->m_oldClientWidth  != alloc->width ||
 212         win->m_oldClientHeight != alloc->height)
 213     {
 214         win->m_oldClientWidth  = alloc->width;
 215         win->m_oldClientHeight = alloc->height;
 216
 217         wxSize size(win->m_widget->allocation.width,
 218                     win->m_widget->allocation.height);
 219         size += win->m_decorSize;
 220         win->m_width  = size.x;
 221         win->m_height = size.y;
 222
 223         if (!win->IsIconized())
 224         {
 225             wxSizeEvent event(size, win->GetId());
 226             event.SetEventObject(win);
 227             win->HandleWindowEvent(event);
 228         }
 229         // else the window is currently unmapped, don't generate size events
 230     }
 231 }
 232 }
 233
 234 // ----------------------------------------------------------------------------
 235 // "size_request"
 236 // ----------------------------------------------------------------------------
 237
 238 extern "C" {
 239 static
 240 void wxgtk_tlw_size_request_callback(GtkWidget * WXUNUSED(widget),
 241                                      GtkRequisition *requisition,
 242                                      wxTopLevelWindowGTK *win)
 243 {
 244     // we must return the size of the window without WM decorations, otherwise
 245     // GTK+ gets confused, so don't call just GetSize() here
 246     win->GTKDoGetSize(&requisition->width, &requisition->height);
 247 }
 248 }
 249
 250 //-----------------------------------------------------------------------------
 251 // "delete_event"
 252 //-----------------------------------------------------------------------------
 253
 254 extern "C" {
 255 static gboolean
 256 gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
 257                            GdkEvent *WXUNUSED(event),
 258                            wxTopLevelWindowGTK *win )
 259 {
 260     if (win->IsEnabled() &&
 261         (wxOpenModalDialogsCount == 0 || (win->GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) ||
 262          win->IsGrabbed()))
 263         win->Close();
 264
 265     return TRUE;
 266 }
 267 }
 268
 269 //-----------------------------------------------------------------------------
 270 // "configure_event"
 271 //-----------------------------------------------------------------------------
 272
 273 extern "C" {
 274 static gboolean
 275 gtk_frame_configure_callback( GtkWidget* widget,
 276                               GdkEventConfigure *WXUNUSED(event),
 277                               wxTopLevelWindowGTK *win )
 278 {
 279     if (!win->m_hasVMT || !win->IsShown())
 280         return FALSE;
 281
 282     wxPoint point;
 283     gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
 284
 285     win->m_x = point.x;
 286     win->m_y = point.y;
 287     wxMoveEvent mevent(point, win->GetId());
 288     mevent.SetEventObject( win );
 289     win->HandleWindowEvent( mevent );
 290
 291     return FALSE;
 292 }
 293 }
 294
 295 //-----------------------------------------------------------------------------
 296 // "realize" from m_widget
 297 //-----------------------------------------------------------------------------
 298
 299 // we cannot the WM hints and icons before the widget has been realized,
 300 // so we do this directly after realization
 301
 302 extern "C" {
 303 static void
 304 gtk_frame_realized_callback( GtkWidget * WXUNUSED(widget),
 305                              wxTopLevelWindowGTK *win )
 306 {
 307     gdk_window_set_decorations(win->m_widget->window,
 308                                (GdkWMDecoration)win->m_gdkDecor);
 309     gdk_window_set_functions(win->m_widget->window,
 310                                (GdkWMFunction)win->m_gdkFunc);
 311
 312     // GTK's shrinking/growing policy
 313     if ( !(win->m_gdkFunc & GDK_FUNC_RESIZE) )
 314         gtk_window_set_resizable(GTK_WINDOW(win->m_widget), FALSE);
 315     else
 316         gtk_window_set_policy(GTK_WINDOW(win->m_widget), 1, 1, 1);
 317
 318     const wxIconBundle& icons = win->GetIcons();
 319     if (icons.GetIconCount())
 320         win->SetIcons(icons);
 321
 322     if (win->HasFlag(wxFRAME_SHAPED))
 323         win->SetShape(win->m_shape); // it will really set the window shape now
 324 }
 325 }
 326
 327 //-----------------------------------------------------------------------------
 328 // "map_event" from m_widget
 329 //-----------------------------------------------------------------------------
 330
 331 extern "C" {
 332 static gboolean
 333 gtk_frame_map_callback( GtkWidget*,
 334                         GdkEvent * WXUNUSED(event),
 335                         wxTopLevelWindow *win )
 336 {
 337     const bool wasIconized = win->IsIconized();
 338     win->SetIconizeState(false);
 339     if (wasIconized)
 340     {
 341         // Because GetClientSize() returns (0,0) when IsIconized() is true,
 342         // a size event must be generated, just in case GetClientSize() was
 343         // called while iconized. This specifically happens when restoring a
 344         // tlw that was "rolled up" with some WMs.
 345         // Queue a resize rather than sending size event directly to allow
 346         // children to be made visible first.
 347         win->m_oldClientWidth = 0;
 348         gtk_widget_queue_resize(win->m_wxwindow);
 349     }
 350     // it is possible for m_isShown to be false here, see bug #9909
 351     if (win->wxWindowBase::Show(true))
 352     {
 353         wxShowEvent eventShow(win->GetId(), true);
 354         eventShow.SetEventObject(win);
 355         win->GetEventHandler()->ProcessEvent(eventShow);
 356     }
 357     return false;
 358 }
 359 }
 360
 361 //-----------------------------------------------------------------------------
 362 // "unmap_event" from m_widget
 363 //-----------------------------------------------------------------------------
 364
 365 extern "C" {
 366 static gboolean
 367 gtk_frame_unmap_callback( GtkWidget * WXUNUSED(widget),
 368                           GdkEvent * WXUNUSED(event),
 369                           wxTopLevelWindow *win )
 370 {
 371     win->SetIconizeState(true);
 372     return false;
 373 }
 374 }
 375
 376 //-----------------------------------------------------------------------------
 377
 378 bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int* bottom)
 379 {
 380     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 381     Atom xproperty = gdk_x11_atom_to_xatom_for_display(
 382                         gdk_drawable_get_display(window), property);
 383     Atom type;
 384     int format;
 385     gulong nitems, bytes_after;
 386     guchar* data;
 387     Status status = XGetWindowProperty(
 388         gdk_x11_drawable_get_xdisplay(window),
 389         gdk_x11_drawable_get_xid(window),
 390         xproperty,
 391         0, 4, false, XA_CARDINAL,
 392         &type, &format, &nitems, &bytes_after, &data);
 393     const bool success = status == Success && data && nitems == 4;
 394     if (success)
 395     {
 396         long* p = (long*)data;
 397         if (left)   *left   = int(p[0]);
 398         if (right)  *right  = int(p[1]);
 399         if (top)    *top    = int(p[2]);
 400         if (bottom) *bottom = int(p[3]);
 401     }
 402     if (data)
 403         XFree(data);
 404     return success;
 405 }
 406
 407 //-----------------------------------------------------------------------------
 408 // "property_notify_event" from m_widget
 409 //-----------------------------------------------------------------------------
 410
 411 extern "C" {
 412 static gboolean property_notify_event(
 413     GtkWidget*, GdkEventProperty* event, wxTopLevelWindowGTK* win)
 414 {
 415     // Watch for changes to _NET_FRAME_EXTENTS property
 416     static GdkAtom property = gdk_atom_intern("_NET_FRAME_EXTENTS", false);
 417     if (event->state == GDK_PROPERTY_NEW_VALUE && event->atom == property)
 418     {
 419         int left, right, top, bottom;
 420         if (wxGetFrameExtents(event->window, &left, &right, &top, &bottom))
 421         {
 422             const wxSize decorSize =
 423                 wxSize(left + right, top + bottom);
 424             win->GTKUpdateDecorSize(decorSize);
 425         }
 426     }
 427     return false;
 428 }
 429 }
 430
 431 // ----------------------------------------------------------------------------
 432 // wxTopLevelWindowGTK creation
 433 // ----------------------------------------------------------------------------
 434
 435 void wxTopLevelWindowGTK::Init()
 436 {
 437     m_mainWidget = (GtkWidget*) NULL;
 438     m_isIconized = false;
 439     m_fsIsShowing = false;
 440     m_themeEnabled = true;
 441     m_gdkDecor =
 442     m_gdkFunc = 0;
 443     m_grabbed = false;
 444     m_deferShow = true;
 445
 446     m_urgency_hint = -2;
 447 }
 448
 449 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 450                                   wxWindowID id,
 451                                   const wxString& title,
 452                                   const wxPoint& pos,
 453                                   const wxSize& sizeOrig,
 454                                   long style,
 455                                   const wxString &name )
 456 {
 457     // always create a frame of some reasonable, even if arbitrary, size (at
 458     // least for MSW compatibility)
 459     wxSize size = sizeOrig;
 460     size.x = WidthDefault(size.x);
 461     size.y = HeightDefault(size.y);
 462
 463     wxTopLevelWindows.Append( this );
 464
 465     if (!PreCreation( parent, pos, size ) ||
 466         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 467     {
 468         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 469         return false;
 470     }
 471
 472     m_title = title;
 473
 474     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 475     //     e.g. in wxTaskBarIconAreaGTK
 476     if (m_widget == NULL)
 477     {
 478 #if wxUSE_LIBHILDON
 479         // we must create HildonWindow and not a normal GtkWindow as the latter
 480         // doesn't look correctly in Maemo environment and it must also be
 481         // registered with the main program object
 482         m_widget = hildon_window_new();
 483         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 484                                   HILDON_WINDOW(m_widget));
 485 #else // !wxUSE_LIBHILDON
 486         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 487         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 488         {
 489             // Tell WM that this is a dialog window and make it center
 490             // on parent by default (this is what GtkDialog ctor does):
 491             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 492                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 493             gtk_window_set_position(GTK_WINDOW(m_widget),
 494                                     GTK_WIN_POS_CENTER_ON_PARENT);
 495         }
 496         else
 497         {
 498             if (style & wxFRAME_TOOL_WINDOW)
 499             {
 500                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 501                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 502
 503                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 504                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 505                 // For consistency between WMs and with Windows, we
 506                 // should set the NO_TASKBAR flag which will apply
 507                 // the set_skip_taskbar_hint if it is available,
 508                 // ensuring no taskbar entry will appear.
 509                 style |= wxFRAME_NO_TASKBAR;
 510             }
 511         }
 512 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 513
 514         g_object_ref(m_widget);
 515     }
 516
 517     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 518     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 519                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 520                        (style & wxFRAME_FLOAT_ON_PARENT)))
 521     {
 522         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 523                                       GTK_WINDOW(topParent->m_widget) );
 524     }
 525
 526     if (style & wxFRAME_NO_TASKBAR)
 527     {
 528         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 529     }
 530
 531     if (style & wxSTAY_ON_TOP)
 532     {
 533         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 534     }
 535
 536 #if 0
 537     if (!name.empty())
 538         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 539 #endif
 540
 541     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 542     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 543
 544     g_signal_connect (m_widget, "delete_event",
 545                       G_CALLBACK (gtk_frame_delete_callback), this);
 546
 547     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 548     m_mainWidget = gtk_vbox_new(false, 0);
 549     gtk_widget_show( m_mainWidget );
 550     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 551     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 552
 553     // m_wxwindow is the client area
 554     m_wxwindow = wxPizza::New();
 555     gtk_widget_show( m_wxwindow );
 556     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 557
 558     // we donm't allow the frame to get the focus as otherwise
 559     // the frame will grab it at arbitrary focus changes
 560     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 561
 562     if (m_parent) m_parent->AddChild( this );
 563
 564     g_signal_connect(m_wxwindow, "size_allocate",
 565         G_CALLBACK(size_allocate), this);
 566
 567     g_signal_connect (m_widget, "size_request",
 568                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 569     PostCreation();
 570
 571     if ((m_x != -1) || (m_y != -1))
 572         gtk_widget_set_uposition( m_widget, m_x, m_y );
 573
 574     //  we cannot set MWM hints and icons before the widget has
 575     //  been realized, so we do this directly after realization
 576     g_signal_connect (m_widget, "realize",
 577                       G_CALLBACK (gtk_frame_realized_callback), this);
 578
 579     // map and unmap for iconized state
 580     g_signal_connect (m_widget, "map_event",
 581                       G_CALLBACK (gtk_frame_map_callback), this);
 582     g_signal_connect (m_widget, "unmap_event",
 583                       G_CALLBACK (gtk_frame_unmap_callback), this);
 584
 585     // for wxMoveEvent
 586     g_signal_connect (m_widget, "configure_event",
 587                       G_CALLBACK (gtk_frame_configure_callback), this);
 588
 589     // activation
 590     g_signal_connect_after (m_widget, "focus_in_event",
 591                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 592     g_signal_connect_after (m_widget, "focus_out_event",
 593                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 594
 595     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 596     g_signal_connect(m_widget, "property_notify_event",
 597         G_CALLBACK(property_notify_event), this);
 598
 599     // translate wx decorations styles into Motif WM hints (they are recognized
 600     // by other WMs as well)
 601
 602     // always enable moving the window as we have no separate flag for enabling
 603     // it
 604     m_gdkFunc = GDK_FUNC_MOVE;
 605
 606     if ( style & wxCLOSE_BOX )
 607         m_gdkFunc |= GDK_FUNC_CLOSE;
 608
 609     if ( style & wxMINIMIZE_BOX )
 610         m_gdkFunc |= GDK_FUNC_MINIMIZE;
 611
 612     if ( style & wxMAXIMIZE_BOX )
 613         m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 614
 615     if ( (style & wxSIMPLE_BORDER) || (style & wxNO_BORDER) )
 616     {
 617         m_gdkDecor = 0;
 618     }
 619     else // have border
 620     {
 621         m_gdkDecor = GDK_DECOR_BORDER;
 622
 623         if ( style & wxCAPTION )
 624             m_gdkDecor |= GDK_DECOR_TITLE;
 625
 626         if ( style & wxSYSTEM_MENU )
 627             m_gdkDecor |= GDK_DECOR_MENU;
 628
 629         if ( style & wxMINIMIZE_BOX )
 630             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 631
 632         if ( style & wxMAXIMIZE_BOX )
 633             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 634
 635         if ( style & wxRESIZE_BORDER )
 636         {
 637            m_gdkFunc |= GDK_FUNC_RESIZE;
 638            m_gdkDecor |= GDK_DECOR_RESIZEH;
 639         }
 640     }
 641
 642     m_decorSize = GetCachedDecorSize();
 643     int w, h;
 644     GTKDoGetSize(&w, &h);
 645     gtk_window_set_default_size(GTK_WINDOW(m_widget), w, h);
 646
 647     return true;
 648 }
 649
 650 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 651 {
 652 #if wxUSE_LIBHILDON
 653     // it can also be a (standard) dialog
 654     if ( HILDON_IS_WINDOW(m_widget) )
 655     {
 656         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 657                                      HILDON_WINDOW(m_widget));
 658     }
 659 #endif // wxUSE_LIBHILDON
 660
 661     if (m_grabbed)
 662     {
 663         wxFAIL_MSG(_T("Window still grabbed"));
 664         RemoveGrab();
 665     }
 666
 667     m_isBeingDeleted = true;
 668
 669     // it may also be GtkScrolledWindow in the case of an MDI child
 670     if (GTK_IS_WINDOW(m_widget))
 671     {
 672         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 673     }
 674
 675     if (g_activeFrame == this)
 676         g_activeFrame = NULL;
 677     if (g_lastActiveFrame == this)
 678         g_lastActiveFrame = NULL;
 679 }
 680
 681 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 682 {
 683     if (enable)
 684         m_gdkFunc |= GDK_FUNC_CLOSE;
 685     else
 686         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 687
 688     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 689         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 690
 691     return true;
 692 }
 693
 694 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 695 {
 696     if (show == m_fsIsShowing)
 697         return false; // return what?
 698
 699     m_fsIsShowing = show;
 700
 701     wxX11FullScreenMethod method =
 702         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 703                                  (WXWindow)GDK_ROOT_WINDOW());
 704
 705     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 706     //     to switch to fullscreen, which is not always available. We must
 707     //     check if WM supports the spec and use legacy methods if it
 708     //     doesn't.
 709     if ( method == wxX11_FS_WMSPEC )
 710     {
 711         if (show)
 712             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 713         else
 714             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 715     }
 716     else
 717     {
 718         GdkWindow *window = m_widget->window;
 719
 720         if (show)
 721         {
 722             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 723             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 724
 725             int screen_width,screen_height;
 726             wxDisplaySize( &screen_width, &screen_height );
 727
 728             gint client_x, client_y, root_x, root_y;
 729             gint width, height;
 730
 731             m_fsSaveGdkFunc = m_gdkFunc;
 732             m_fsSaveGdkDecor = m_gdkDecor;
 733             m_gdkFunc = m_gdkDecor = 0;
 734             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 735             gdk_window_set_functions(window, (GdkWMFunction)0);
 736
 737             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 738             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 739                          &width, &height, NULL);
 740
 741             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 742                         screen_width + 1, screen_height + 1);
 743
 744             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 745                                     (WXWindow)GDK_ROOT_WINDOW(),
 746                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 747                                     show, &m_fsSaveFrame, method);
 748         }
 749         else // hide
 750         {
 751             m_gdkFunc = m_fsSaveGdkFunc;
 752             m_gdkDecor = m_fsSaveGdkDecor;
 753             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 754             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 755
 756             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 757                                     (WXWindow)GDK_ROOT_WINDOW(),
 758                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 759                                     show, &m_fsSaveFrame, method);
 760
 761             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 762                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 763         }
 764     }
 765
 766     // documented behaviour is to show the window if it's still hidden when
 767     // showing it full screen
 768     if (show)
 769         Show();
 770
 771     return true;
 772 }
 773
 774 // ----------------------------------------------------------------------------
 775 // overridden wxWindow methods
 776 // ----------------------------------------------------------------------------
 777
 778 bool wxTopLevelWindowGTK::Show( bool show )
 779 {
 780     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 781
 782     bool deferShow = show && m_deferShow && !m_isShown;
 783     if (deferShow)
 784     {
 785         m_deferShow =
 786         deferShow = !GTK_WIDGET_REALIZED(m_widget) &&
 787             gdk_x11_screen_supports_net_wm_hint(
 788                 gtk_widget_get_screen(m_widget),
 789                 gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)) &&
 790             g_signal_handler_find(m_widget,
 791                 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
 792                 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
 793                 0, NULL, NULL, this);
 794     }
 795     if (deferShow)
 796     {
 797         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 798         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 799         // notification is received, so correct frame extents are known.
 800         // This allows resizing m_widget to keep the overall size in sync with
 801         // what wxWidgets expects it to be without an obvious change in the
 802         // window size immediately after it becomes visible.
 803
 804         // Realize m_widget, so m_widget->window can be used. Realizing normally
 805         // causes the widget tree to be size_allocated, which generates size
 806         // events in the wrong order. However, the size_allocates will not be
 807         // done if the allocation is not the default (1,1).
 808         const int alloc_width = m_widget->allocation.width;
 809         if (alloc_width == 1)
 810             m_widget->allocation.width = 2;
 811         gtk_widget_realize(m_widget);
 812         if (alloc_width == 1)
 813             m_widget->allocation.width = 1;
 814
 815         // send _NET_REQUEST_FRAME_EXTENTS
 816         XClientMessageEvent xevent;
 817         memset(&xevent, 0, sizeof(xevent));
 818         xevent.type = ClientMessage;
 819         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 820         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 821             gdk_drawable_get_display(m_widget->window),
 822             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 823         xevent.format = 32;
 824         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 825         XSendEvent(display, DefaultRootWindow(display), false,
 826             SubstructureNotifyMask | SubstructureRedirectMask,
 827             (XEvent*)&xevent);
 828
 829         // defer calling gtk_widget_show()
 830         m_isShown = true;
 831         return true;
 832     }
 833
 834     if (show && !GTK_WIDGET_REALIZED(m_widget))
 835     {
 836         // size_allocate signals occur in reverse order (bottom to top).
 837         // Things work better if the initial wxSizeEvents are sent (from the
 838         // top down), before the initial size_allocate signals occur.
 839         wxSizeEvent event(GetSize(), GetId());
 840         event.SetEventObject(this);
 841         HandleWindowEvent(event);
 842     }
 843
 844     bool change = wxTopLevelWindowBase::Show(show);
 845
 846     if (change && !show)
 847     {
 848         // make sure window has a non-default position, so when it is shown
 849         // again, it won't be repositioned by WM as if it were a new window
 850         // Note that this must be done _after_ the window is hidden.
 851         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 852     }
 853
 854     return change;
 855 }
 856
 857 void wxTopLevelWindowGTK::Raise()
 858 {
 859     gtk_window_present( GTK_WINDOW( m_widget ) );
 860 }
 861
 862 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 863 {
 864     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 865 }
 866
 867 // ----------------------------------------------------------------------------
 868 // window geometry
 869 // ----------------------------------------------------------------------------
 870
 871 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 872 {
 873     wxSize size(m_width, m_height);
 874     size -= m_decorSize;
 875     if (size.x < 0) size.x = 0;
 876     if (size.y < 0) size.y = 0;
 877     if (width)  *width  = size.x;
 878     if (height) *height = size.y;
 879 }
 880
 881 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 882 {
 883     wxCHECK_RET( m_widget, wxT("invalid frame") );
 884
 885     // deal with the position first
 886     int old_x = m_x;
 887     int old_y = m_y;
 888
 889     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 890     {
 891         // -1 means "use existing" unless the flag above is specified
 892         if ( x != -1 )
 893             m_x = x;
 894         if ( y != -1 )
 895             m_y = y;
 896     }
 897     else // wxSIZE_ALLOW_MINUS_ONE
 898     {
 899         m_x = x;
 900         m_y = y;
 901     }
 902
 903     if ( m_x != old_x || m_y != old_y )
 904     {
 905         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 906     }
 907
 908     const wxSize oldSize(m_width, m_height);
 909     if (width >= 0)
 910         m_width = width;
 911     if (height >= 0)
 912         m_height = height;
 913     ConstrainSize();
 914     if (m_width != oldSize.x || m_height != oldSize.y)
 915     {
 916         int w, h;
 917         GTKDoGetSize(&w, &h);
 918         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 919
 920         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 921         wxSizeEvent event(GetSize(), GetId());
 922         event.SetEventObject(this);
 923         HandleWindowEvent(event);
 924     }
 925 }
 926
 927 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 928 {
 929     if (m_deferShow && !m_isShown)
 930         // Since client size is being explicitly set, don't change it later
 931         m_deferShow = false;
 932     wxTopLevelWindowBase::DoSetClientSize(width, height);
 933 }
 934
 935 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 936 {
 937     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 938
 939     if ( IsIconized() )
 940     {
 941         // for consistency with wxMSW, client area is supposed to be empty for
 942         // the iconized windows
 943         if ( width )
 944             *width = 0;
 945         if ( height )
 946             *height = 0;
 947     }
 948     else
 949     {
 950         GTKDoGetSize(width, height);
 951     }
 952 }
 953
 954 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 955                                           int maxW, int maxH,
 956                                           int incW, int incH )
 957 {
 958     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 959
 960     const wxSize minSize = GetMinSize();
 961     const wxSize maxSize = GetMaxSize();
 962     GdkGeometry hints;
 963     int hints_mask = 0;
 964     if (minSize.x > 0 || minSize.y > 0)
 965     {
 966         hints_mask |= GDK_HINT_MIN_SIZE;
 967         hints.min_width = minSize.x - m_decorSize.x;
 968         if (hints.min_width < 0)
 969             hints.min_width = 0;
 970         hints.min_height = minSize.y - m_decorSize.y;
 971         if (hints.min_height < 0)
 972             hints.min_height = 0;
 973     }
 974     if (maxSize.x > 0 || maxSize.y > 0)
 975     {
 976         hints_mask |= GDK_HINT_MAX_SIZE;
 977         hints.max_width = maxSize.x - m_decorSize.x;
 978         if (hints.max_width < 0)
 979             hints.max_width = INT_MAX;
 980         hints.max_height = maxSize.y - m_decorSize.y;
 981         if (hints.max_height < 0)
 982             hints.max_height = INT_MAX;
 983     }
 984     if (incW > 0 || incH > 0)
 985     {
 986         hints_mask |= GDK_HINT_RESIZE_INC;
 987         hints.width_inc  = incW > 0 ? incW : 1;
 988         hints.height_inc = incH > 0 ? incH : 1;
 989     }
 990     gtk_window_set_geometry_hints(
 991         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
 992 }
 993
 994 void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
 995 {
 996     if (!IsMaximized() && !IsFullScreen())
 997         GetCachedDecorSize() = decorSize;
 998     if (m_decorSize != decorSize)
 999     {
1000         const wxSize diff = decorSize - m_decorSize;
1001         m_decorSize = decorSize;
1002         bool resized = false;
1003         if (m_deferShow)
1004         {
1005             // keep overall size unchanged by shrinking m_widget
1006             int w, h;
1007             GTKDoGetSize(&w, &h);
1008             // but not if size would be less than minimum, it won't take effect
1009             const wxSize minSize = GetMinSize();
1010             if (w >= minSize.x && h >= minSize.y)
1011             {
1012                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
1013                 resized = true;
1014             }
1015         }
1016         if (!resized)
1017         {
1018             // adjust overall size to match change in frame extents
1019             m_width  += diff.x;
1020             m_height += diff.y;
1021             if (m_width  < 0) m_width  = 0;
1022             if (m_height < 0) m_height = 0;
1023             m_oldClientWidth = 0;
1024             gtk_widget_queue_resize(m_wxwindow);
1025         }
1026     }
1027     if (m_deferShow)
1028     {
1029         // gtk_widget_show() was deferred, do it now
1030         m_deferShow = false;
1031         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
1032         wxSizeEvent sizeEvent(GetSize(), GetId());
1033         sizeEvent.SetEventObject(this);
1034         HandleWindowEvent(sizeEvent);
1035
1036         gtk_widget_show(m_widget);
1037
1038         wxShowEvent showEvent(GetId(), true);
1039         showEvent.SetEventObject(this);
1040         HandleWindowEvent(showEvent);
1041     }
1042 }
1043
1044 wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
1045 {
1046     static wxSize size[8];
1047
1048     int index = 0;
1049     // title bar
1050     if (m_gdkDecor & (GDK_DECOR_MENU | GDK_DECOR_MINIMIZE | GDK_DECOR_MAXIMIZE | GDK_DECOR_TITLE))
1051         index = 1;
1052     // border
1053     if (m_gdkDecor & GDK_DECOR_BORDER)
1054         index |= 2;
1055     // utility window decor can be different
1056     if (m_windowStyle & wxFRAME_TOOL_WINDOW)
1057         index |= 4;
1058     return size[index];
1059 }
1060
1061 void wxTopLevelWindowGTK::OnInternalIdle()
1062 {
1063     wxWindow::OnInternalIdle();
1064
1065     // Synthetize activate events.
1066     if ( g_sendActivateEvent != -1 )
1067     {
1068         bool activate = g_sendActivateEvent != 0;
1069
1070         // if (!activate) wxPrintf( wxT("de") );
1071         // wxPrintf( wxT("activate\n") );
1072
1073         // do it only once
1074         g_sendActivateEvent = -1;
1075
1076         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1077     }
1078 }
1079
1080 // ----------------------------------------------------------------------------
1081 // frame title/icon
1082 // ----------------------------------------------------------------------------
1083
1084 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1085 {
1086     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1087
1088     if ( title == m_title )
1089         return;
1090
1091     m_title = title;
1092
1093     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1094 }
1095
1096 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1097 {
1098     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1099
1100     wxTopLevelWindowBase::SetIcons( icons );
1101
1102     // Setting icons before window is realized can cause a GTK assertion if
1103     // another TLW is realized before this one, and it has this one as it's
1104     // transient parent. The life demo exibits this problem.
1105     if (GTK_WIDGET_REALIZED(m_widget))
1106     {
1107         GList* list = NULL;
1108         for (size_t i = icons.GetIconCount(); i--;)
1109             list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1110         gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1111         g_list_free(list);
1112     }
1113 }
1114
1115 // ----------------------------------------------------------------------------
1116 // frame state: maximized/iconized/normal
1117 // ----------------------------------------------------------------------------
1118
1119 void wxTopLevelWindowGTK::Maximize(bool maximize)
1120 {
1121     if (maximize)
1122         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1123     else
1124         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1125 }
1126
1127 bool wxTopLevelWindowGTK::IsMaximized() const
1128 {
1129     if(!m_widget->window)
1130         return false;
1131
1132     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1133 }
1134
1135 void wxTopLevelWindowGTK::Restore()
1136 {
1137     // "Present" seems similar enough to "restore"
1138     gtk_window_present( GTK_WINDOW( m_widget ) );
1139 }
1140
1141 void wxTopLevelWindowGTK::Iconize( bool iconize )
1142 {
1143     if (iconize)
1144         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1145     else
1146         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1147 }
1148
1149 bool wxTopLevelWindowGTK::IsIconized() const
1150 {
1151     return m_isIconized;
1152 }
1153
1154 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1155 {
1156     if ( iconize != m_isIconized )
1157     {
1158         m_isIconized = iconize;
1159         (void)SendIconizeEvent(iconize);
1160     }
1161 }
1162
1163 void wxTopLevelWindowGTK::AddGrab()
1164 {
1165     if (!m_grabbed)
1166     {
1167         m_grabbed = true;
1168         gtk_grab_add( m_widget );
1169         wxGUIEventLoop().Run();
1170         gtk_grab_remove( m_widget );
1171     }
1172 }
1173
1174 void wxTopLevelWindowGTK::RemoveGrab()
1175 {
1176     if (m_grabbed)
1177     {
1178         gtk_main_quit();
1179         m_grabbed = false;
1180     }
1181 }
1182
1183
1184 // helper
1185 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1186 {
1187     if (window)
1188     {
1189         if (region.IsEmpty())
1190         {
1191             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1192         }
1193         else
1194         {
1195             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1196             return true;
1197         }
1198     }
1199     return false;
1200 }
1201
1202
1203 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1204 {
1205     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1206                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1207
1208     if ( GTK_WIDGET_REALIZED(m_widget) )
1209     {
1210         if ( m_wxwindow )
1211             do_shape_combine_region(m_wxwindow->window, region);
1212
1213         return do_shape_combine_region(m_widget->window, region);
1214     }
1215     else // not realized yet
1216     {
1217         // store the shape to set, it will be really set once we're realized
1218         m_shape = region;
1219
1220         // we don't know if we're going to succeed or fail, be optimistic by
1221         // default
1222         return true;
1223     }
1224 }
1225
1226 bool wxTopLevelWindowGTK::IsActive()
1227 {
1228     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1229 }
1230
1231 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1232 {
1233     bool new_hint_value = false;
1234
1235     // FIXME: This is a workaround to focus handling problem
1236     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1237     // yet been processed, and the internal focus system is not up to date yet.
1238     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1239     ::wxYieldIfNeeded();
1240
1241     if(m_urgency_hint >= 0)
1242         g_source_remove(m_urgency_hint);
1243
1244     m_urgency_hint = -2;
1245
1246     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1247     {
1248         new_hint_value = true;
1249
1250         if (flags & wxUSER_ATTENTION_INFO)
1251         {
1252             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1253         } else {
1254             m_urgency_hint = -1;
1255         }
1256     }
1257
1258 #if GTK_CHECK_VERSION(2,7,0)
1259     if(!gtk_check_version(2,7,0))
1260         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1261     else
1262 #endif
1263         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1264 }
1265
1266 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1267 {
1268     // Store which styles were changed
1269     long styleChanges = style ^ m_windowStyle;
1270
1271     // Process wxWindow styles. This also updates the internal variable
1272     // Therefore m_windowStyle bits carry now the _new_ style values
1273     wxWindow::SetWindowStyleFlag(style);
1274
1275     // just return for now if widget does not exist yet
1276     if (!m_widget)
1277         return;
1278
1279     if ( styleChanges & wxSTAY_ON_TOP )
1280     {
1281         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1282                                   m_windowStyle & wxSTAY_ON_TOP);
1283     }
1284
1285     if ( styleChanges & wxFRAME_NO_TASKBAR )
1286     {
1287         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1288                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1289     }
1290 }
1291
1292 /* Get the X Window between child and the root window.
1293    This should usually be the WM managed XID */
1294 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1295 {
1296     Window root, parent;
1297     Window* children;
1298     unsigned int nchildren;
1299
1300     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1301     XFree(children);
1302
1303     while (parent != root) {
1304         child = parent;
1305         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1306         XFree(children);
1307     }
1308
1309     return child;
1310 }
1311
1312 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1313 {
1314     if (!m_widget || !m_widget->window)
1315         return false;
1316
1317     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1318     // We need to get the X Window that has the root window as the immediate parent
1319     // and m_widget->window as a child. This should be the X Window that the WM manages and
1320     // from which the opacity property is checked from.
1321     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1322
1323
1324     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1325     if (alpha == 0xff)
1326         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1327     else
1328     {
1329         long opacity = alpha * 0x1010101L;
1330         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1331                         XA_CARDINAL, 32, PropModeReplace,
1332                         (unsigned char *) &opacity, 1L);
1333     }
1334     XSync(dpy, False);
1335     return true;
1336 }
1337
1338 bool wxTopLevelWindowGTK::CanSetTransparent()
1339 {
1340     // allow to override automatic detection as it's far from perfect
1341     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1342     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1343     {
1344         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1345     }
1346
1347 #if GTK_CHECK_VERSION(2,10,0)
1348     if (!gtk_check_version(2,10,0))
1349     {
1350         return (gtk_widget_is_composited (m_widget));
1351     }
1352     else
1353 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1354     {
1355         return false;
1356     }
1357
1358 #if 0 // Don't be optimistic here for the sake of wxAUI
1359     int opcode, event, error;
1360     // Check for the existence of a RGBA visual instead?
1361     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1362                            "Composite", &opcode, &event, &error);
1363 #endif
1364 }