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 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         guchar* data;
 396         Status status = XGetWindowProperty(
 397             gdk_x11_drawable_get_xdisplay(event->window),
 398             gdk_x11_drawable_get_xid(event->window),
 399             xproperty,
 400             0, 4, false, XA_CARDINAL,
 401             &type, &format, &nitems, &bytes_after, &data);
 402         if (status == Success && data && nitems == 4)
 403         {
 404             long* p = (long*)data;
 405             const wxSize decorSize =
 406                 wxSize(int(p[0] + p[1]), int(p[2] + p[3]));
 407             if (win->m_decorSize != decorSize)
 408             {
 409                 const wxSize diff = decorSize - win->m_decorSize;
 410                 win->m_decorSize = decorSize;
 411                 bool resized = false;
 412                 if (win->m_deferShow)
 413                 {
 414                     // keep overall size unchanged by shrinking m_widget,
 415                     // if min size will allow it
 416                     const wxSize minSize = win->GetMinSize();
 417                     int w, h;
 418                     win->GTKDoGetSize(&w, &h);
 419                     if (w >= minSize.x && h >= minSize.y)
 420                     {
 421                         gtk_window_resize(GTK_WINDOW(win->m_widget), w, h);
 422                         resized = true;
 423                     }
 424                 }
 425                 if (!resized)
 426                 {
 427                     // adjust overall size to match change in frame extents
 428                     win->m_width  += diff.x;
 429                     win->m_height += diff.y;
 430                     if (win->m_width  < 0) win->m_width  = 0;
 431                     if (win->m_height < 0) win->m_height = 0;
 432                     if (!win->m_deferShow)
 433                     {
 434                         win->m_oldClientWidth = 0;
 435                         gtk_widget_queue_resize(win->m_wxwindow);
 436                     }
 437                 }
 438             }
 439             if (win->m_deferShow)
 440             {
 441                 // gtk_widget_show() was deferred, do it now
 442                 win->m_deferShow = false;
 443                 win->GetClientSize(
 444                     &win->m_oldClientWidth, &win->m_oldClientHeight);
 445                 wxSizeEvent sizeEvent(win->GetSize(), win->GetId());
 446                 sizeEvent.SetEventObject(win);
 447                 win->HandleWindowEvent(sizeEvent);
 448
 449                 gtk_widget_show(win->m_widget);
 450
 451                 wxShowEvent showEvent(win->GetId(), true);
 452                 showEvent.SetEventObject(win);
 453                 win->HandleWindowEvent(showEvent);
 454             }
 455         }
 456         if (data)
 457             XFree(data);
 458     }
 459     return false;
 460 }
 461 }
 462
 463 BEGIN_EVENT_TABLE(wxTopLevelWindowGTK, wxTopLevelWindowBase)
 464     EVT_SYS_COLOUR_CHANGED(wxTopLevelWindowGTK::OnSysColourChanged)
 465 END_EVENT_TABLE()
 466
 467
 468 // ----------------------------------------------------------------------------
 469 // wxTopLevelWindowGTK creation
 470 // ----------------------------------------------------------------------------
 471
 472 void wxTopLevelWindowGTK::Init()
 473 {
 474     m_mainWidget = (GtkWidget*) NULL;
 475     m_isIconized = false;
 476     m_fsIsShowing = false;
 477     m_themeEnabled = true;
 478     m_gdkDecor = m_gdkFunc = 0;
 479     m_grabbed = false;
 480     m_deferShow = true;
 481
 482     m_urgency_hint = -2;
 483 }
 484
 485 bool wxTopLevelWindowGTK::Create( wxWindow *parent,
 486                                   wxWindowID id,
 487                                   const wxString& title,
 488                                   const wxPoint& pos,
 489                                   const wxSize& sizeOrig,
 490                                   long style,
 491                                   const wxString &name )
 492 {
 493     // always create a frame of some reasonable, even if arbitrary, size (at
 494     // least for MSW compatibility)
 495     wxSize size = sizeOrig;
 496     size.x = WidthDefault(size.x);
 497     size.y = HeightDefault(size.y);
 498
 499     wxTopLevelWindows.Append( this );
 500
 501     if (!PreCreation( parent, pos, size ) ||
 502         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
 503     {
 504         wxFAIL_MSG( wxT("wxTopLevelWindowGTK creation failed") );
 505         return false;
 506     }
 507
 508     m_title = title;
 509
 510     // NB: m_widget may be !=NULL if it was created by derived class' Create,
 511     //     e.g. in wxTaskBarIconAreaGTK
 512     if (m_widget == NULL)
 513     {
 514 #if wxUSE_LIBHILDON
 515         // we must create HildonWindow and not a normal GtkWindow as the latter
 516         // doesn't look correctly in Maemo environment and it must also be
 517         // registered with the main program object
 518         m_widget = hildon_window_new();
 519         hildon_program_add_window(wxTheApp->GetHildonProgram(),
 520                                   HILDON_WINDOW(m_widget));
 521 #else // !wxUSE_LIBHILDON
 522         m_widget = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 523         if (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)
 524         {
 525             // Tell WM that this is a dialog window and make it center
 526             // on parent by default (this is what GtkDialog ctor does):
 527             gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 528                                      GDK_WINDOW_TYPE_HINT_DIALOG);
 529             gtk_window_set_position(GTK_WINDOW(m_widget),
 530                                     GTK_WIN_POS_CENTER_ON_PARENT);
 531         }
 532         else
 533         {
 534             if (style & wxFRAME_TOOL_WINDOW)
 535             {
 536                 gtk_window_set_type_hint(GTK_WINDOW(m_widget),
 537                                          GDK_WINDOW_TYPE_HINT_UTILITY);
 538
 539                 // On some WMs, like KDE, a TOOL_WINDOW will still show
 540                 // on the taskbar, but on Gnome a TOOL_WINDOW will not.
 541                 // For consistency between WMs and with Windows, we
 542                 // should set the NO_TASKBAR flag which will apply
 543                 // the set_skip_taskbar_hint if it is available,
 544                 // ensuring no taskbar entry will appear.
 545                 style |= wxFRAME_NO_TASKBAR;
 546             }
 547         }
 548 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON
 549     }
 550
 551     wxWindow *topParent = wxGetTopLevelParent(m_parent);
 552     if (topParent && (((GTK_IS_WINDOW(topParent->m_widget)) &&
 553                        (GetExtraStyle() & wxTOPLEVEL_EX_DIALOG)) ||
 554                        (style & wxFRAME_FLOAT_ON_PARENT)))
 555     {
 556         gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 557                                       GTK_WINDOW(topParent->m_widget) );
 558     }
 559
 560     if (style & wxFRAME_NO_TASKBAR)
 561     {
 562         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
 563     }
 564
 565     if (style & wxSTAY_ON_TOP)
 566     {
 567         gtk_window_set_keep_above(GTK_WINDOW(m_widget), TRUE);
 568     }
 569
 570 #if 0
 571     if (!name.empty())
 572         gtk_window_set_role( GTK_WINDOW(m_widget), wxGTK_CONV( name ) );
 573 #endif
 574
 575     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
 576     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 577
 578     g_signal_connect (m_widget, "delete_event",
 579                       G_CALLBACK (gtk_frame_delete_callback), this);
 580
 581     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
 582     m_mainWidget = gtk_vbox_new(false, 0);
 583     gtk_widget_show( m_mainWidget );
 584     GTK_WIDGET_UNSET_FLAGS( m_mainWidget, GTK_CAN_FOCUS );
 585     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
 586
 587     // m_wxwindow is the client area
 588     m_wxwindow = wxPizza::New();
 589     gtk_widget_show( m_wxwindow );
 590     gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
 591
 592     // we donm't allow the frame to get the focus as otherwise
 593     // the frame will grab it at arbitrary focus changes
 594     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 595
 596     if (m_parent) m_parent->AddChild( this );
 597
 598     g_signal_connect(m_wxwindow, "size_allocate",
 599         G_CALLBACK(size_allocate), this);
 600
 601     g_signal_connect (m_widget, "size_request",
 602                       G_CALLBACK (wxgtk_tlw_size_request_callback), this);
 603     PostCreation();
 604
 605     if ((m_x != -1) || (m_y != -1))
 606         gtk_widget_set_uposition( m_widget, m_x, m_y );
 607
 608     //  we cannot set MWM hints and icons before the widget has
 609     //  been realized, so we do this directly after realization
 610     g_signal_connect (m_widget, "realize",
 611                       G_CALLBACK (gtk_frame_realized_callback), this);
 612
 613     // map and unmap for iconized state
 614     g_signal_connect (m_widget, "map_event",
 615                       G_CALLBACK (gtk_frame_map_callback), this);
 616     g_signal_connect (m_widget, "unmap_event",
 617                       G_CALLBACK (gtk_frame_unmap_callback), this);
 618
 619     // for wxMoveEvent
 620     g_signal_connect (m_widget, "configure_event",
 621                       G_CALLBACK (gtk_frame_configure_callback), this);
 622
 623     // activation
 624     g_signal_connect_after (m_widget, "focus_in_event",
 625                       G_CALLBACK (gtk_frame_focus_in_callback), this);
 626     g_signal_connect_after (m_widget, "focus_out_event",
 627                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 628
 629     gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
 630     g_signal_connect(m_widget, "property_notify_event",
 631         G_CALLBACK(property_notify_event), this);
 632
 633     // decorations
 634     if ((style & wxSIMPLE_BORDER) || (style & wxNO_BORDER))
 635     {
 636         m_gdkDecor = 0;
 637         m_gdkFunc = 0;
 638     }
 639     else
 640     {
 641         m_gdkDecor = GDK_DECOR_BORDER;
 642         m_gdkFunc = GDK_FUNC_MOVE;
 643
 644         // All this is for Motif Window Manager "hints" and is supposed to be
 645         // recognized by other WMs as well.
 646         if ((style & wxCAPTION) != 0)
 647         {
 648             m_gdkDecor |= GDK_DECOR_TITLE;
 649         }
 650         if ((style & wxCLOSE_BOX) != 0)
 651         {
 652             m_gdkFunc |= GDK_FUNC_CLOSE;
 653         }
 654         if ((style & wxSYSTEM_MENU) != 0)
 655         {
 656             m_gdkDecor |= GDK_DECOR_MENU;
 657         }
 658         if ((style & wxMINIMIZE_BOX) != 0)
 659         {
 660             m_gdkFunc |= GDK_FUNC_MINIMIZE;
 661             m_gdkDecor |= GDK_DECOR_MINIMIZE;
 662         }
 663         if ((style & wxMAXIMIZE_BOX) != 0)
 664         {
 665             m_gdkFunc |= GDK_FUNC_MAXIMIZE;
 666             m_gdkDecor |= GDK_DECOR_MAXIMIZE;
 667         }
 668         if ((style & wxRESIZE_BORDER) != 0)
 669         {
 670            m_gdkFunc |= GDK_FUNC_RESIZE;
 671            m_gdkDecor |= GDK_DECOR_RESIZEH;
 672         }
 673     }
 674
 675     gtk_window_set_default_size(GTK_WINDOW(m_widget), m_width, m_height);
 676
 677     return true;
 678 }
 679
 680 wxTopLevelWindowGTK::~wxTopLevelWindowGTK()
 681 {
 682 #if wxUSE_LIBHILDON
 683     // it can also be a (standard) dialog
 684     if ( HILDON_IS_WINDOW(m_widget) )
 685     {
 686         hildon_program_remove_window(wxTheApp->GetHildonProgram(),
 687                                      HILDON_WINDOW(m_widget));
 688     }
 689 #endif // wxUSE_LIBHILDON
 690
 691     if (m_grabbed)
 692     {
 693         wxFAIL_MSG(_T("Window still grabbed"));
 694         RemoveGrab();
 695     }
 696
 697     m_isBeingDeleted = true;
 698
 699     // it may also be GtkScrolledWindow in the case of an MDI child
 700     if (GTK_IS_WINDOW(m_widget))
 701     {
 702         gtk_window_set_focus( GTK_WINDOW(m_widget), NULL );
 703     }
 704
 705     if (g_activeFrame == this)
 706         g_activeFrame = NULL;
 707     if (g_lastActiveFrame == this)
 708         g_lastActiveFrame = NULL;
 709 }
 710
 711 bool wxTopLevelWindowGTK::EnableCloseButton( bool enable )
 712 {
 713     if (enable)
 714         m_gdkFunc |= GDK_FUNC_CLOSE;
 715     else
 716         m_gdkFunc &= ~GDK_FUNC_CLOSE;
 717
 718     if (GTK_WIDGET_REALIZED(m_widget) && (m_widget->window))
 719         gdk_window_set_functions( m_widget->window, (GdkWMFunction)m_gdkFunc );
 720
 721     return true;
 722 }
 723
 724 bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long)
 725 {
 726     if (show == m_fsIsShowing)
 727         return false; // return what?
 728
 729     m_fsIsShowing = show;
 730
 731     wxX11FullScreenMethod method =
 732         wxGetFullScreenMethodX11((WXDisplay*)GDK_DISPLAY(),
 733                                  (WXWindow)GDK_ROOT_WINDOW());
 734
 735     // NB: gtk_window_fullscreen() uses freedesktop.org's WMspec extensions
 736     //     to switch to fullscreen, which is not always available. We must
 737     //     check if WM supports the spec and use legacy methods if it
 738     //     doesn't.
 739     if ( method == wxX11_FS_WMSPEC )
 740     {
 741         if (show)
 742             gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
 743         else
 744             gtk_window_unfullscreen( GTK_WINDOW( m_widget ) );
 745     }
 746     else
 747     {
 748         GdkWindow *window = m_widget->window;
 749
 750         if (show)
 751         {
 752             GetPosition( &m_fsSaveFrame.x, &m_fsSaveFrame.y );
 753             GetSize( &m_fsSaveFrame.width, &m_fsSaveFrame.height );
 754
 755             int screen_width,screen_height;
 756             wxDisplaySize( &screen_width, &screen_height );
 757
 758             gint client_x, client_y, root_x, root_y;
 759             gint width, height;
 760
 761             m_fsSaveGdkFunc = m_gdkFunc;
 762             m_fsSaveGdkDecor = m_gdkDecor;
 763             m_gdkFunc = m_gdkDecor = 0;
 764             gdk_window_set_decorations(window, (GdkWMDecoration)0);
 765             gdk_window_set_functions(window, (GdkWMFunction)0);
 766
 767             gdk_window_get_origin (m_widget->window, &root_x, &root_y);
 768             gdk_window_get_geometry (m_widget->window, &client_x, &client_y,
 769                          &width, &height, NULL);
 770
 771             gdk_window_move_resize (m_widget->window, -client_x, -client_y,
 772                         screen_width + 1, screen_height + 1);
 773
 774             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 775                                     (WXWindow)GDK_ROOT_WINDOW(),
 776                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 777                                     show, &m_fsSaveFrame, method);
 778         }
 779         else // hide
 780         {
 781             m_gdkFunc = m_fsSaveGdkFunc;
 782             m_gdkDecor = m_fsSaveGdkDecor;
 783             gdk_window_set_decorations(window, (GdkWMDecoration)m_gdkDecor);
 784             gdk_window_set_functions(window, (GdkWMFunction)m_gdkFunc);
 785
 786             wxSetFullScreenStateX11((WXDisplay*)GDK_DISPLAY(),
 787                                     (WXWindow)GDK_ROOT_WINDOW(),
 788                                     (WXWindow)GDK_WINDOW_XWINDOW(window),
 789                                     show, &m_fsSaveFrame, method);
 790
 791             SetSize(m_fsSaveFrame.x, m_fsSaveFrame.y,
 792                     m_fsSaveFrame.width, m_fsSaveFrame.height);
 793         }
 794     }
 795
 796     // documented behaviour is to show the window if it's still hidden when
 797     // showing it full screen
 798     if (show)
 799         Show();
 800
 801     return true;
 802 }
 803
 804 // ----------------------------------------------------------------------------
 805 // overridden wxWindow methods
 806 // ----------------------------------------------------------------------------
 807
 808 bool wxTopLevelWindowGTK::Show( bool show )
 809 {
 810     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 811
 812     const bool wasRealized = GTK_WIDGET_REALIZED(m_widget);
 813     bool deferShow = show && m_deferShow && !wasRealized;
 814     if (deferShow)
 815     {
 816         // Initial show. If WM supports _NET_REQUEST_FRAME_EXTENTS, defer
 817         // calling gtk_widget_show() until _NET_FRAME_EXTENTS property
 818         // notification is received, so correct frame extents are known.
 819         // This allows resizing m_widget to keep the overall size in sync with
 820         // what wxWidgets expects it to be without an obvious change in the
 821         // window size immediately after it becomes visible.
 822
 823         // Realize m_widget, so m_widget->window can be used. Realizing causes
 824         // the widget tree to be size_allocated, which generates size events in
 825         // the wrong order. So temporarily remove child from m_widget while
 826         // realizing.
 827         GtkWidget* child = GTK_BIN(m_widget)->child;
 828         if (child)
 829         {
 830             g_object_ref(child);
 831             gtk_container_remove(GTK_CONTAINER(m_widget), child);
 832         }
 833         gtk_widget_realize(m_widget);
 834         if (child)
 835         {
 836             gtk_container_add(GTK_CONTAINER(m_widget), child);
 837             g_object_unref(child);
 838         }
 839
 840         m_deferShow =
 841         deferShow = gdk_x11_screen_supports_net_wm_hint(
 842             gdk_drawable_get_screen(m_widget->window),
 843             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false)) != 0;
 844     }
 845     if (deferShow)
 846     {
 847         // send _NET_REQUEST_FRAME_EXTENTS
 848         XClientMessageEvent xevent;
 849         memset(&xevent, 0, sizeof(xevent));
 850         xevent.type = ClientMessage;
 851         xevent.window = gdk_x11_drawable_get_xid(m_widget->window);
 852         xevent.message_type = gdk_x11_atom_to_xatom_for_display(
 853             gdk_drawable_get_display(m_widget->window),
 854             gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false));
 855         xevent.format = 32;
 856         Display* display = gdk_x11_drawable_get_xdisplay(m_widget->window);
 857         XSendEvent(display, DefaultRootWindow(display), false,
 858             SubstructureNotifyMask | SubstructureRedirectMask,
 859             (XEvent*)&xevent);
 860
 861         // defer calling gtk_widget_show()
 862         m_isShown = true;
 863         return true;
 864     }
 865
 866     if (show && !wasRealized)
 867     {
 868         // size_allocate signals occur in reverse order (bottom to top).
 869         // Things work better if the initial wxSizeEvents are sent (from the
 870         // top down), before the initial size_allocate signals occur.
 871         wxSizeEvent event(GetSize(), GetId());
 872         event.SetEventObject(this);
 873         HandleWindowEvent(event);
 874     }
 875
 876     bool change = wxTopLevelWindowBase::Show(show);
 877
 878     if (change && !show)
 879     {
 880         // make sure window has a non-default position, so when it is shown
 881         // again, it won't be repositioned by WM as if it were a new window
 882         // Note that this must be done _after_ the window is hidden.
 883         gtk_window_move((GtkWindow*)m_widget, m_x, m_y);
 884     }
 885
 886     return change;
 887 }
 888
 889 void wxTopLevelWindowGTK::Raise()
 890 {
 891     gtk_window_present( GTK_WINDOW( m_widget ) );
 892 }
 893
 894 void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 895 {
 896     wxFAIL_MSG( wxT("DoMoveWindow called for wxTopLevelWindowGTK") );
 897 }
 898
 899 // ----------------------------------------------------------------------------
 900 // window geometry
 901 // ----------------------------------------------------------------------------
 902
 903 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 904 {
 905     wxSize size(m_width, m_height);
 906     size -= m_decorSize;
 907     if (size.x < 0) size.x = 0;
 908     if (size.y < 0) size.y = 0;
 909     if (width)  *width  = size.x;
 910     if (height) *height = size.y;
 911 }
 912
 913 void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 914 {
 915     wxCHECK_RET( m_widget, wxT("invalid frame") );
 916
 917     // deal with the position first
 918     int old_x = m_x;
 919     int old_y = m_y;
 920
 921     if ( !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE) )
 922     {
 923         // -1 means "use existing" unless the flag above is specified
 924         if ( x != -1 )
 925             m_x = x;
 926         if ( y != -1 )
 927             m_y = y;
 928     }
 929     else // wxSIZE_ALLOW_MINUS_ONE
 930     {
 931         m_x = x;
 932         m_y = y;
 933     }
 934
 935     if ( m_x != old_x || m_y != old_y )
 936     {
 937         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
 938     }
 939
 940     const wxSize oldSize(m_width, m_height);
 941     if (width >= 0)
 942         m_width = width;
 943     if (height >= 0)
 944         m_height = height;
 945     ConstrainSize();
 946     if (m_width != oldSize.x || m_height != oldSize.y)
 947     {
 948         int w, h;
 949         GTKDoGetSize(&w, &h);
 950         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 951
 952         GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
 953         wxSizeEvent event(GetSize(), GetId());
 954         event.SetEventObject(this);
 955         HandleWindowEvent(event);
 956     }
 957 }
 958
 959 void wxTopLevelWindowGTK::DoSetClientSize(int width, int height)
 960 {
 961     if (m_deferShow && !m_isShown)
 962         // Since client size is being explicitly set, don't change it later
 963         m_deferShow = false;
 964     wxTopLevelWindowBase::DoSetClientSize(width, height);
 965 }
 966
 967 void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
 968 {
 969     wxASSERT_MSG(m_widget, wxT("invalid frame"));
 970
 971     if ( IsIconized() )
 972     {
 973         // for consistency with wxMSW, client area is supposed to be empty for
 974         // the iconized windows
 975         if ( width )
 976             *width = 0;
 977         if ( height )
 978             *height = 0;
 979     }
 980     else
 981     {
 982         GTKDoGetSize(width, height);
 983     }
 984 }
 985
 986 void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
 987                                           int maxW, int maxH,
 988                                           int incW, int incH )
 989 {
 990     wxTopLevelWindowBase::DoSetSizeHints( minW, minH, maxW, maxH, incW, incH );
 991
 992     const wxSize minSize = GetMinSize();
 993     const wxSize maxSize = GetMaxSize();
 994     GdkGeometry hints;
 995     int hints_mask = 0;
 996     if (minSize.x > 0 || minSize.y > 0)
 997     {
 998         hints_mask |= GDK_HINT_MIN_SIZE;
 999         hints.min_width = minSize.x - m_decorSize.x;
1000         if (hints.min_width < 0)
1001             hints.min_width = 0;
1002         hints.min_height = minSize.y - m_decorSize.y;
1003         if (hints.min_height < 0)
1004             hints.min_height = 0;
1005     }
1006     if (maxSize.x > 0 || maxSize.y > 0)
1007     {
1008         hints_mask |= GDK_HINT_MAX_SIZE;
1009         hints.max_width = maxSize.x - m_decorSize.x;
1010         if (hints.max_width < 0)
1011             hints.max_width = INT_MAX;
1012         hints.max_height = maxSize.y - m_decorSize.y;
1013         if (hints.max_height < 0)
1014             hints.max_height = INT_MAX;
1015     }
1016     if (incW > 0 || incH > 0)
1017     {
1018         hints_mask |= GDK_HINT_RESIZE_INC;
1019         hints.width_inc  = incW > 0 ? incW : 1;
1020         hints.height_inc = incH > 0 ? incH : 1;
1021     }
1022     gtk_window_set_geometry_hints(
1023         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
1024 }
1025
1026 void wxTopLevelWindowGTK::OnInternalIdle()
1027 {
1028     // set the focus if not done yet and if we can already do it
1029     if ( GTK_WIDGET_REALIZED(m_wxwindow) )
1030     {
1031         if ( g_delayedFocus &&
1032              wxGetTopLevelParent((wxWindow*)g_delayedFocus) == this )
1033         {
1034             wxLogTrace(_T("focus"),
1035                        _T("Setting focus from wxTLW::OnIdle() to %s(%s)"),
1036                        g_delayedFocus->GetClassInfo()->GetClassName(),
1037                        g_delayedFocus->GetLabel().c_str());
1038
1039             g_delayedFocus->SetFocus();
1040             g_delayedFocus = NULL;
1041         }
1042     }
1043
1044     wxWindow::OnInternalIdle();
1045
1046     // Synthetize activate events.
1047     if ( g_sendActivateEvent != -1 )
1048     {
1049         bool activate = g_sendActivateEvent != 0;
1050
1051         // if (!activate) wxPrintf( wxT("de") );
1052         // wxPrintf( wxT("activate\n") );
1053
1054         // do it only once
1055         g_sendActivateEvent = -1;
1056
1057         wxTheApp->SetActive(activate, (wxWindow *)g_lastActiveFrame);
1058     }
1059 }
1060
1061 // ----------------------------------------------------------------------------
1062 // frame title/icon
1063 // ----------------------------------------------------------------------------
1064
1065 void wxTopLevelWindowGTK::SetTitle( const wxString &title )
1066 {
1067     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1068
1069     if ( title == m_title )
1070         return;
1071
1072     m_title = title;
1073
1074     gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( title ) );
1075 }
1076
1077 void wxTopLevelWindowGTK::SetIcons( const wxIconBundle &icons )
1078 {
1079     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
1080
1081     wxTopLevelWindowBase::SetIcons( icons );
1082
1083     GList *list = NULL;
1084
1085     const size_t numIcons = icons.GetIconCount();
1086     for ( size_t i = 0; i < numIcons; i++ )
1087     {
1088         list = g_list_prepend(list, icons.GetIconByIndex(i).GetPixbuf());
1089     }
1090
1091     gtk_window_set_icon_list(GTK_WINDOW(m_widget), list);
1092     g_list_free(list);
1093 }
1094
1095 // ----------------------------------------------------------------------------
1096 // frame state: maximized/iconized/normal
1097 // ----------------------------------------------------------------------------
1098
1099 void wxTopLevelWindowGTK::Maximize(bool maximize)
1100 {
1101     if (maximize)
1102         gtk_window_maximize( GTK_WINDOW( m_widget ) );
1103     else
1104         gtk_window_unmaximize( GTK_WINDOW( m_widget ) );
1105 }
1106
1107 bool wxTopLevelWindowGTK::IsMaximized() const
1108 {
1109     if(!m_widget->window)
1110         return false;
1111
1112     return gdk_window_get_state(m_widget->window) & GDK_WINDOW_STATE_MAXIMIZED;
1113 }
1114
1115 void wxTopLevelWindowGTK::Restore()
1116 {
1117     // "Present" seems similar enough to "restore"
1118     gtk_window_present( GTK_WINDOW( m_widget ) );
1119 }
1120
1121 void wxTopLevelWindowGTK::Iconize( bool iconize )
1122 {
1123     if (iconize)
1124         gtk_window_iconify( GTK_WINDOW( m_widget ) );
1125     else
1126         gtk_window_deiconify( GTK_WINDOW( m_widget ) );
1127 }
1128
1129 bool wxTopLevelWindowGTK::IsIconized() const
1130 {
1131     return m_isIconized;
1132 }
1133
1134 void wxTopLevelWindowGTK::SetIconizeState(bool iconize)
1135 {
1136     if ( iconize != m_isIconized )
1137     {
1138         m_isIconized = iconize;
1139         (void)SendIconizeEvent(iconize);
1140     }
1141 }
1142
1143 void wxTopLevelWindowGTK::AddGrab()
1144 {
1145     if (!m_grabbed)
1146     {
1147         m_grabbed = true;
1148         gtk_grab_add( m_widget );
1149         wxGUIEventLoop().Run();
1150         gtk_grab_remove( m_widget );
1151     }
1152 }
1153
1154 void wxTopLevelWindowGTK::RemoveGrab()
1155 {
1156     if (m_grabbed)
1157     {
1158         gtk_main_quit();
1159         m_grabbed = false;
1160     }
1161 }
1162
1163
1164 // helper
1165 static bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
1166 {
1167     if (window)
1168     {
1169         if (region.IsEmpty())
1170         {
1171             gdk_window_shape_combine_mask(window, NULL, 0, 0);
1172         }
1173         else
1174         {
1175             gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
1176             return true;
1177         }
1178     }
1179     return false;
1180 }
1181
1182
1183 bool wxTopLevelWindowGTK::SetShape(const wxRegion& region)
1184 {
1185     wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
1186                  _T("Shaped windows must be created with the wxFRAME_SHAPED style."));
1187
1188     GdkWindow *window = NULL;
1189     if (m_wxwindow)
1190     {
1191         do_shape_combine_region(m_wxwindow->window, region);
1192     }
1193     window = m_widget->window;
1194     return do_shape_combine_region(window, region);
1195 }
1196
1197 bool wxTopLevelWindowGTK::IsActive()
1198 {
1199     return (this == (wxTopLevelWindowGTK*)g_activeFrame);
1200 }
1201
1202 void wxTopLevelWindowGTK::RequestUserAttention(int flags)
1203 {
1204     bool new_hint_value = false;
1205
1206     // FIXME: This is a workaround to focus handling problem
1207     // If RequestUserAttention is called for example right after a wxSleep, OnInternalIdle hasn't
1208     // yet been processed, and the internal focus system is not up to date yet.
1209     // wxYieldIfNeeded ensures the processing of it, but can have unwanted side effects - MR
1210     ::wxYieldIfNeeded();
1211
1212     if(m_urgency_hint >= 0)
1213         g_source_remove(m_urgency_hint);
1214
1215     m_urgency_hint = -2;
1216
1217     if( GTK_WIDGET_REALIZED(m_widget) && !IsActive() )
1218     {
1219         new_hint_value = true;
1220
1221         if (flags & wxUSER_ATTENTION_INFO)
1222         {
1223             m_urgency_hint = g_timeout_add(5000, (GSourceFunc)gtk_frame_urgency_timer_callback, this);
1224         } else {
1225             m_urgency_hint = -1;
1226         }
1227     }
1228
1229 #if GTK_CHECK_VERSION(2,7,0)
1230     if(!gtk_check_version(2,7,0))
1231         gtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1232     else
1233 #endif
1234         wxgtk_window_set_urgency_hint(GTK_WINDOW( m_widget ), new_hint_value);
1235 }
1236
1237 void wxTopLevelWindowGTK::SetWindowStyleFlag( long style )
1238 {
1239     // Store which styles were changed
1240     long styleChanges = style ^ m_windowStyle;
1241
1242     // Process wxWindow styles. This also updates the internal variable
1243     // Therefore m_windowStyle bits carry now the _new_ style values
1244     wxWindow::SetWindowStyleFlag(style);
1245
1246     // just return for now if widget does not exist yet
1247     if (!m_widget)
1248         return;
1249
1250     if ( styleChanges & wxSTAY_ON_TOP )
1251     {
1252         gtk_window_set_keep_above(GTK_WINDOW(m_widget),
1253                                   m_windowStyle & wxSTAY_ON_TOP);
1254     }
1255
1256     if ( styleChanges & wxFRAME_NO_TASKBAR )
1257     {
1258         gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget),
1259                                          m_windowStyle & wxFRAME_NO_TASKBAR);
1260     }
1261 }
1262
1263 /* Get the X Window between child and the root window.
1264    This should usually be the WM managed XID */
1265 static Window wxGetTopmostWindowX11(Display *dpy, Window child)
1266 {
1267     Window root, parent;
1268     Window* children;
1269     unsigned int nchildren;
1270
1271     XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1272     XFree(children);
1273
1274     while (parent != root) {
1275         child = parent;
1276         XQueryTree(dpy, child, &root, &parent, &children, &nchildren);
1277         XFree(children);
1278     }
1279
1280     return child;
1281 }
1282
1283 bool wxTopLevelWindowGTK::SetTransparent(wxByte alpha)
1284 {
1285     if (!m_widget || !m_widget->window)
1286         return false;
1287
1288     Display* dpy = GDK_WINDOW_XDISPLAY (m_widget->window);
1289     // We need to get the X Window that has the root window as the immediate parent
1290     // and m_widget->window as a child. This should be the X Window that the WM manages and
1291     // from which the opacity property is checked from.
1292     Window win = wxGetTopmostWindowX11(dpy, GDK_WINDOW_XID (m_widget->window));
1293
1294
1295     // Using pure Xlib to not have a GTK version check mess due to gtk2.0 not having GdkDisplay
1296     if (alpha == 0xff)
1297         XDeleteProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False));
1298     else
1299     {
1300         long opacity = alpha * 0x1010101L;
1301         XChangeProperty(dpy, win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
1302                         XA_CARDINAL, 32, PropModeReplace,
1303                         (unsigned char *) &opacity, 1L);
1304     }
1305     XSync(dpy, False);
1306     return true;
1307 }
1308
1309 bool wxTopLevelWindowGTK::CanSetTransparent()
1310 {
1311     // allow to override automatic detection as it's far from perfect
1312     static const wxChar *SYSOPT_TRANSPARENT = wxT("gtk.tlw.can-set-transparent");
1313     if ( wxSystemOptions::HasOption(SYSOPT_TRANSPARENT) )
1314     {
1315         return wxSystemOptions::GetOptionInt(SYSOPT_TRANSPARENT) != 0;
1316     }
1317
1318 #if GTK_CHECK_VERSION(2,10,0)
1319     if (!gtk_check_version(2,10,0))
1320     {
1321         return (gtk_widget_is_composited (m_widget));
1322     }
1323     else
1324 #endif // In case of lower versions than gtk+-2.10.0 we could look for _NET_WM_CM_Sn ourselves
1325     {
1326         return false;
1327     }
1328
1329 #if 0 // Don't be optimistic here for the sake of wxAUI
1330     int opcode, event, error;
1331     // Check for the existence of a RGBA visual instead?
1332     return XQueryExtension(gdk_x11_get_default_xdisplay (),
1333                            "Composite", &opcode, &event, &error);
1334 #endif
1335 }
1336
1337 void wxTopLevelWindowGTK::OnSysColourChanged(wxSysColourChangedEvent& event)
1338 {
1339     // We don't know the order in which top-level windows will
1340     // be notified, so we need to clear the system objects
1341     // for each top-level window.
1342     extern void wxClearGtkSystemObjects();
1343     wxClearGtkSystemObjects();
1344
1345     // wxWindowBase::OnSysColourChanged will propagate event
1346     // to children
1347     event.Skip();
1348 }