src/x11/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // for compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/app.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/hash.h"
  19     #include "wx/intl.h"
  20     #include "wx/log.h"
  21     #include "wx/utils.h"
  22     #include "wx/frame.h"
  23     #include "wx/icon.h"
  24     #include "wx/dialog.h"
  25     #include "wx/memory.h"
  26     #include "wx/gdicmn.h"
  27     #include "wx/module.h"
  28     #include "wx/crt.h"
  29 #endif
  30
  31 #include "wx/evtloop.h"
  32 #include "wx/filename.h"
  33
  34 #include "wx/univ/theme.h"
  35 #include "wx/univ/renderer.h"
  36 #include "wx/generic/private/timer.h"
  37
  38 #if wxUSE_THREADS
  39     #include "wx/thread.h"
  40 #endif
  41
  42 #include "wx/x11/private.h"
  43
  44 #include <string.h>
  45
  46 //------------------------------------------------------------------------
  47 //   global data
  48 //------------------------------------------------------------------------
  49
  50 wxWindowHash *wxWidgetHashTable = NULL;
  51 wxWindowHash *wxClientWidgetHashTable = NULL;
  52
  53 static bool g_showIconic = false;
  54 static wxSize g_initialSize = wxDefaultSize;
  55
  56 // This is required for wxFocusEvent::SetWindow(). It will only
  57 // work for focus events which we provoke ourselves (by calling
  58 // SetFocus()). It will not work for those events, which X11
  59 // generates itself.
  60 static wxWindow *g_nextFocus = NULL;
  61 static wxWindow *g_prevFocus = NULL;
  62
  63 //------------------------------------------------------------------------
  64 //   X11 error handling
  65 //------------------------------------------------------------------------
  66
  67 typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  68
  69 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  70
  71 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  72 {
  73     // just forward to the default handler for now
  74     if (gs_pfnXErrorHandler)
  75         return gs_pfnXErrorHandler(dpy, xevent);
  76     else
  77         return 0;
  78 }
  79
  80 //------------------------------------------------------------------------
  81 //   wxApp
  82 //------------------------------------------------------------------------
  83
  84 long wxApp::sm_lastMessageTime = 0;
  85
  86 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  87
  88 bool wxApp::Initialize(int& argC, wxChar **argV)
  89 {
  90 #if !wxUSE_NANOX
  91     // install the X error handler
  92     gs_pfnXErrorHandler = XSetErrorHandler( wxXErrorHandler );
  93 #endif
  94
  95     wxString displayName;
  96     bool syncDisplay = false;
  97
  98     int argCOrig = argC;
  99     for ( int i = 0; i < argCOrig; i++ )
 100     {
 101         if (wxStrcmp( argV[i], wxT("-display") ) == 0)
 102         {
 103             if (i < (argCOrig - 1))
 104             {
 105                 argV[i++] = NULL;
 106
 107                 displayName = argV[i];
 108
 109                 argV[i] = NULL;
 110                 argC -= 2;
 111             }
 112         }
 113         else if (wxStrcmp( argV[i], wxT("-geometry") ) == 0)
 114         {
 115             if (i < (argCOrig - 1))
 116             {
 117                 argV[i++] = NULL;
 118
 119                 int w, h;
 120                 if (wxSscanf(argV[i], wxT("%dx%d"), &w, &h) != 2)
 121                 {
 122                     wxLogError( _("Invalid geometry specification '%s'"),
 123                                 wxString(argV[i]).c_str() );
 124                 }
 125                 else
 126                 {
 127                     g_initialSize = wxSize(w, h);
 128                 }
 129
 130                 argV[i] = NULL;
 131                 argC -= 2;
 132             }
 133         }
 134         else if (wxStrcmp( argV[i], wxT("-sync") ) == 0)
 135         {
 136             syncDisplay = true;
 137
 138             argV[i] = NULL;
 139             argC--;
 140         }
 141         else if (wxStrcmp( argV[i], wxT("-iconic") ) == 0)
 142         {
 143             g_showIconic = true;
 144
 145             argV[i] = NULL;
 146             argC--;
 147         }
 148     }
 149
 150     if ( argC != argCOrig )
 151     {
 152         // remove the arguments we consumed
 153         for ( int i = 0; i < argC; i++ )
 154         {
 155             while ( !argV[i] )
 156             {
 157                 memmove(argV + i, argV + i + 1, (argCOrig - i)*sizeof(wxChar *));
 158             }
 159         }
 160     }
 161
 162     // open and set up the X11 display
 163     if ( !wxSetDisplay(displayName) )
 164     {
 165         wxLogError(_("wxWidgets could not open display. Exiting."));
 166         return false;
 167     }
 168
 169     Display *dpy = wxGlobalDisplay();
 170     if (syncDisplay)
 171         XSynchronize(dpy, True);
 172
 173     XSelectInput(dpy, XDefaultRootWindow(dpy), PropertyChangeMask);
 174
 175     wxSetDetectableAutoRepeat( true );
 176
 177
 178     if ( !wxAppBase::Initialize(argC, argV) )
 179         return false;
 180
 181 #if wxUSE_UNICODE
 182     // Glib's type system required by Pango
 183     g_type_init();
 184 #endif
 185
 186 #if wxUSE_INTL
 187     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 188 #endif
 189
 190     wxWidgetHashTable = new wxWindowHash;
 191     wxClientWidgetHashTable = new wxWindowHash;
 192
 193     return true;
 194 }
 195
 196 void wxApp::CleanUp()
 197 {
 198     delete wxWidgetHashTable;
 199     wxWidgetHashTable = NULL;
 200     delete wxClientWidgetHashTable;
 201     wxClientWidgetHashTable = NULL;
 202
 203     wxAppBase::CleanUp();
 204 }
 205
 206 wxApp::wxApp()
 207 {
 208     m_mainColormap = NULL;
 209     m_topLevelWidget = NULL;
 210     m_maxRequestSize = 0;
 211     m_showIconic = false;
 212     m_initialSize = wxDefaultSize;
 213
 214 #if !wxUSE_NANOX
 215     m_visualInfo = NULL;
 216 #endif
 217 }
 218
 219 wxApp::~wxApp()
 220 {
 221 #if !wxUSE_NANOX
 222     delete m_visualInfo;
 223 #endif
 224 }
 225
 226 #if !wxUSE_NANOX
 227
 228 //-----------------------------------------------------------------------
 229 // X11 predicate function for exposure compression
 230 //-----------------------------------------------------------------------
 231
 232 struct wxExposeInfo
 233 {
 234     Window window;
 235     Bool found_non_matching;
 236 };
 237
 238 extern "C"
 239 Bool wxX11ExposePredicate (Display *WXUNUSED(display), XEvent *xevent, XPointer arg)
 240 {
 241     wxExposeInfo *info = (wxExposeInfo*) arg;
 242
 243     if (info->found_non_matching)
 244        return FALSE;
 245
 246     if (xevent->xany.type != Expose)
 247     {
 248         info->found_non_matching = true;
 249         return FALSE;
 250     }
 251
 252     if (xevent->xexpose.window != info->window)
 253     {
 254         info->found_non_matching = true;
 255         return FALSE;
 256     }
 257
 258     return TRUE;
 259 }
 260
 261 #endif // wxUSE_NANOX
 262
 263 //-----------------------------------------------------------------------
 264 // Processes an X event, returning true if the event was processed.
 265 //-----------------------------------------------------------------------
 266
 267 bool wxApp::ProcessXEvent(WXEvent* _event)
 268 {
 269     XEvent* event = (XEvent*) _event;
 270
 271     wxWindow* win = NULL;
 272     Window window = XEventGetWindow(event);
 273 #if 0
 274     Window actualWindow = window;
 275 #endif
 276
 277     // Find the first wxWindow that corresponds to this event window
 278     // Because we're receiving events after a window
 279     // has been destroyed, assume a 1:1 match between
 280     // Window and wxWindow, so if it's not in the table,
 281     // it must have been destroyed.
 282
 283     win = wxGetWindowFromTable(window);
 284     if (!win)
 285     {
 286 #if wxUSE_TWO_WINDOWS
 287         win = wxGetClientWindowFromTable(window);
 288         if (!win)
 289 #endif
 290             return false;
 291     }
 292
 293
 294     switch (event->type)
 295     {
 296         case Expose:
 297         {
 298 #if wxUSE_TWO_WINDOWS && !wxUSE_NANOX
 299             if (event->xexpose.window != (Window)win->GetClientAreaWindow())
 300             {
 301                 XEvent tmp_event;
 302                 wxExposeInfo info;
 303                 info.window = event->xexpose.window;
 304                 info.found_non_matching = false;
 305                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, wxX11ExposePredicate, (XPointer) &info ))
 306                 {
 307                     // Don't worry about optimizing redrawing the border etc.
 308                 }
 309                 win->NeedUpdateNcAreaInIdle();
 310             }
 311             else
 312 #endif
 313             {
 314                 win->GetUpdateRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 315                                               XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 316                 win->GetClearRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 317                                          XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 318
 319 #if !wxUSE_NANOX
 320                 XEvent tmp_event;
 321                 wxExposeInfo info;
 322                 info.window = event->xexpose.window;
 323                 info.found_non_matching = false;
 324                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, wxX11ExposePredicate, (XPointer) &info ))
 325                 {
 326                     win->GetUpdateRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 327                                                   tmp_event.xexpose.width, tmp_event.xexpose.height );
 328
 329                     win->GetClearRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 330                                                  tmp_event.xexpose.width, tmp_event.xexpose.height );
 331                 }
 332 #endif
 333
 334                 // This simplifies the expose and clear areas to simple
 335                 // rectangles.
 336                 win->GetUpdateRegion() = win->GetUpdateRegion().GetBox();
 337                 win->GetClearRegion() = win->GetClearRegion().GetBox();
 338
 339                 // If we only have one X11 window, always indicate
 340                 // that borders might have to be redrawn.
 341                 if (win->GetMainWindow() == win->GetClientAreaWindow())
 342                     win->NeedUpdateNcAreaInIdle();
 343
 344                 // Only erase background, paint in idle time.
 345                 win->SendEraseEvents();
 346
 347                 // EXPERIMENT
 348                 //win->Update();
 349             }
 350
 351             return true;
 352         }
 353
 354 #if !wxUSE_NANOX
 355         case GraphicsExpose:
 356         {
 357             wxLogTrace( wxT("expose"), wxT("GraphicsExpose from %s"), win->GetName().c_str());
 358
 359             win->GetUpdateRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 360                                           event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 361
 362             win->GetClearRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 363                                          event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 364
 365             if (event->xgraphicsexpose.count == 0)
 366             {
 367                 // Only erase background, paint in idle time.
 368                 win->SendEraseEvents();
 369                 // win->Update();
 370             }
 371
 372             return true;
 373         }
 374 #endif
 375
 376         case KeyPress:
 377         {
 378             if (!win->IsEnabled())
 379                 return false;
 380
 381             wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 382             wxTranslateKeyEvent(keyEvent, win, window, event);
 383
 384             // wxLogDebug( "OnKey from %s", win->GetName().c_str() );
 385
 386             // We didn't process wxEVT_KEY_DOWN, so send wxEVT_CHAR
 387             if (win->HandleWindowEvent( keyEvent ))
 388                 return true;
 389
 390             keyEvent.SetEventType(wxEVT_CHAR);
 391             // Do the translation again, retaining the ASCII
 392             // code.
 393             if (wxTranslateKeyEvent(keyEvent, win, window, event, true) &&
 394                 win->HandleWindowEvent( keyEvent ))
 395                 return true;
 396
 397             if ( (keyEvent.m_keyCode == WXK_TAB) &&
 398                  win->GetParent() && (win->GetParent()->HasFlag( wxTAB_TRAVERSAL)) )
 399             {
 400                 wxNavigationKeyEvent new_event;
 401                 new_event.SetEventObject( win->GetParent() );
 402                 /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 403                 new_event.SetDirection( (keyEvent.m_keyCode == WXK_TAB) );
 404                 /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 405                 new_event.SetWindowChange( keyEvent.ControlDown() );
 406                 new_event.SetCurrentFocus( win );
 407                 return win->GetParent()->HandleWindowEvent( new_event );
 408             }
 409
 410             return false;
 411         }
 412         case KeyRelease:
 413         {
 414             if (!win->IsEnabled())
 415                 return false;
 416
 417             wxKeyEvent keyEvent(wxEVT_KEY_UP);
 418             wxTranslateKeyEvent(keyEvent, win, window, event);
 419
 420             return win->HandleWindowEvent( keyEvent );
 421         }
 422         case ConfigureNotify:
 423         {
 424 #if wxUSE_NANOX
 425             if (event->update.utype == GR_UPDATE_SIZE)
 426 #endif
 427             {
 428                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 429                 if ( tlw )
 430                 {
 431                     tlw->SetConfigureGeometry( XConfigureEventGetX(event), XConfigureEventGetY(event),
 432                         XConfigureEventGetWidth(event), XConfigureEventGetHeight(event) );
 433                 }
 434
 435                 if ( tlw && tlw->IsShown() )
 436                 {
 437                     tlw->SetNeedResizeInIdle();
 438                 }
 439                 else
 440                 {
 441                     wxSizeEvent sizeEvent( wxSize(XConfigureEventGetWidth(event), XConfigureEventGetHeight(event)), win->GetId() );
 442                     sizeEvent.SetEventObject( win );
 443
 444                     return win->HandleWindowEvent( sizeEvent );
 445                 }
 446             }
 447             return false;
 448         }
 449 #if !wxUSE_NANOX
 450         case PropertyNotify:
 451             return HandlePropertyChange(_event);
 452
 453         case ClientMessage:
 454         {
 455             if (!win->IsEnabled())
 456                 return false;
 457
 458             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);
 459             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);
 460
 461             if (event->xclient.message_type == wm_protocols)
 462             {
 463                 if ((Atom) (event->xclient.data.l[0]) == wm_delete_window)
 464                 {
 465                     win->Close(false);
 466                     return true;
 467                 }
 468             }
 469             return false;
 470         }
 471 #if 0
 472         case DestroyNotify:
 473         {
 474             printf( "destroy from %s\n", win->GetName().c_str() );
 475             break;
 476         }
 477         case CreateNotify:
 478         {
 479             printf( "create from %s\n", win->GetName().c_str() );
 480             break;
 481         }
 482         case MapRequest:
 483         {
 484             printf( "map request from %s\n", win->GetName().c_str() );
 485             break;
 486         }
 487         case ResizeRequest:
 488         {
 489             printf( "resize request from %s\n", win->GetName().c_str() );
 490
 491             Display *disp = (Display*) wxGetDisplay();
 492             XEvent report;
 493
 494             //  to avoid flicker
 495             report = * event;
 496             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 497
 498             wxSize sz = win->GetSize();
 499             wxSizeEvent sizeEvent(sz, win->GetId());
 500             sizeEvent.SetEventObject(win);
 501
 502             return win->HandleWindowEvent( sizeEvent );
 503         }
 504 #endif
 505 #endif
 506 #if wxUSE_NANOX
 507         case GR_EVENT_TYPE_CLOSE_REQ:
 508         {
 509             if (win)
 510             {
 511                 win->Close(false);
 512                 return true;
 513             }
 514             return false;
 515             break;
 516         }
 517 #endif
 518         case EnterNotify:
 519         case LeaveNotify:
 520         case ButtonPress:
 521         case ButtonRelease:
 522         case MotionNotify:
 523         {
 524             if (!win->IsEnabled())
 525                 return false;
 526
 527             // Here we check if the top level window is
 528             // disabled, which is one aspect of modality.
 529             wxWindow *tlw = win;
 530             while (tlw && !tlw->IsTopLevel())
 531                 tlw = tlw->GetParent();
 532             if (tlw && !tlw->IsEnabled())
 533                 return false;
 534
 535             if (event->type == ButtonPress)
 536             {
 537                 if ((win != wxWindow::FindFocus()) && win->CanAcceptFocus())
 538                 {
 539                     // This might actually be done in wxWindow::SetFocus()
 540                     // and not here. TODO.
 541                     g_prevFocus = wxWindow::FindFocus();
 542                     g_nextFocus = win;
 543
 544                     wxLogTrace( wxT("focus"), wxT("About to call SetFocus on %s of type %s due to button press"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 545
 546                     // Record the fact that this window is
 547                     // getting the focus, because we'll need to
 548                     // check if its parent is getting a bogus
 549                     // focus and duly ignore it.
 550                     // TODO: may need to have this code in SetFocus, too.
 551                     extern wxWindow* g_GettingFocus;
 552                     g_GettingFocus = win;
 553                     win->SetFocus();
 554                 }
 555             }
 556
 557 #if !wxUSE_NANOX
 558             if (event->type == LeaveNotify || event->type == EnterNotify)
 559             {
 560                 // Throw out NotifyGrab and NotifyUngrab
 561                 if (event->xcrossing.mode != NotifyNormal)
 562                     return false;
 563             }
 564 #endif
 565             wxMouseEvent wxevent;
 566             wxTranslateMouseEvent(wxevent, win, window, event);
 567             return win->HandleWindowEvent( wxevent );
 568         }
 569         case FocusIn:
 570 #if !wxUSE_NANOX
 571             if ((event->xfocus.detail != NotifyPointer) &&
 572                 (event->xfocus.mode == NotifyNormal))
 573 #endif
 574             {
 575                 wxLogTrace( wxT("focus"), wxT("FocusIn from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 576
 577                 extern wxWindow* g_GettingFocus;
 578                 if (g_GettingFocus && g_GettingFocus->GetParent() == win)
 579                 {
 580                     // Ignore this, this can be a spurious FocusIn
 581                     // caused by a child having its focus set.
 582                     g_GettingFocus = NULL;
 583                     wxLogTrace( wxT("focus"), wxT("FocusIn from %s of type %s being deliberately ignored"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 584                     return true;
 585                 }
 586                 else
 587                 {
 588                     wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 589                     focusEvent.SetEventObject(win);
 590                     focusEvent.SetWindow( g_prevFocus );
 591                     g_prevFocus = NULL;
 592
 593                     return win->HandleWindowEvent(focusEvent);
 594                 }
 595             }
 596             return false;
 597
 598         case FocusOut:
 599 #if !wxUSE_NANOX
 600             if ((event->xfocus.detail != NotifyPointer) &&
 601                 (event->xfocus.mode == NotifyNormal))
 602 #endif
 603             {
 604                 wxLogTrace( wxT("focus"), wxT("FocusOut from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 605
 606                 wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 607                 focusEvent.SetEventObject(win);
 608                 focusEvent.SetWindow( g_nextFocus );
 609                 g_nextFocus = NULL;
 610                 return win->HandleWindowEvent(focusEvent);
 611             }
 612             return false;
 613     }
 614
 615     return false;
 616 }
 617
 618 // This should be redefined in a derived class for
 619 // handling property change events for XAtom IPC.
 620 bool wxApp::HandlePropertyChange(WXEvent *WXUNUSED(event))
 621 {
 622     // by default do nothing special
 623     // TODO: what to do for X11
 624     // XtDispatchEvent((XEvent*) event);
 625     return false;
 626 }
 627
 628 void wxApp::WakeUpIdle()
 629 {
 630     // TODO: use wxMotif implementation?
 631
 632     // Wake up the idle handler processor, even if it is in another thread...
 633 }
 634
 635
 636 // Create display, and other initialization
 637 bool wxApp::OnInitGui()
 638 {
 639 #if wxUSE_LOG
 640     // Eventually this line will be removed, but for
 641     // now we don't want to try popping up a dialog
 642     // for error messages.
 643     delete wxLog::SetActiveTarget(new wxLogStderr);
 644 #endif
 645
 646     if (!wxAppBase::OnInitGui())
 647         return false;
 648
 649     Display *dpy = wxGlobalDisplay();
 650     GetMainColormap(dpy);
 651
 652     m_maxRequestSize = XMaxRequestSize(dpy);
 653
 654 #if !wxUSE_NANOX
 655     m_visualInfo = new wxXVisualInfo;
 656     wxFillXVisualInfo(m_visualInfo, dpy);
 657 #endif
 658
 659     return true;
 660 }
 661
 662 #if wxUSE_UNICODE
 663
 664 #include <pango/pango.h>
 665 #include <pango/pangox.h>
 666 #ifdef HAVE_PANGO_XFT
 667     #include <pango/pangoxft.h>
 668 #endif
 669
 670 PangoContext* wxApp::GetPangoContext()
 671 {
 672     static PangoContext *s_pangoContext = NULL;
 673     if ( !s_pangoContext )
 674     {
 675         Display *dpy = wxGlobalDisplay();
 676
 677 #ifdef HAVE_PANGO_XFT
 678         int xscreen = DefaultScreen(dpy);
 679         static int use_xft = -1;
 680         if (use_xft == -1)
 681         {
 682             wxString val = wxGetenv( L"GDK_USE_XFT" );
 683             use_xft = val == L"1";
 684         }
 685
 686         if (use_xft)
 687             s_pangoContext = pango_xft_get_context(dpy, xscreen);
 688         else
 689 #endif // HAVE_PANGO_XFT
 690             s_pangoContext = pango_x_get_context(dpy);
 691
 692         if (!PANGO_IS_CONTEXT(s_pangoContext))
 693         {
 694             wxLogError( wxT("No pango context.") );
 695         }
 696     }
 697
 698     return s_pangoContext;
 699 }
 700
 701 #endif // wxUSE_UNICODE
 702
 703 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 704 {
 705     if (!display) /* Must be called first with non-NULL display */
 706         return m_mainColormap;
 707
 708     int defaultScreen = DefaultScreen((Display*) display);
 709     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 710
 711     Colormap c = DefaultColormapOfScreen(screen);
 712
 713     if (!m_mainColormap)
 714         m_mainColormap = (WXColormap) c;
 715
 716     return (WXColormap) c;
 717 }
 718
 719 Window wxGetWindowParent(Window window)
 720 {
 721     wxASSERT_MSG( window, wxT("invalid window") );
 722
 723     return (Window) 0;
 724
 725 #ifndef __VMS
 726    // VMS chokes on unreacheable code
 727    Window parent, root = 0;
 728 #if wxUSE_NANOX
 729     int noChildren = 0;
 730 #else
 731     unsigned int noChildren = 0;
 732 #endif
 733     Window* children = NULL;
 734
 735     // #define XQueryTree(d,w,r,p,c,nc)     GrQueryTree(w,p,c,nc)
 736     int res = 1;
 737 #if !wxUSE_NANOX
 738     res =
 739 #endif
 740         XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 741              & children, & noChildren);
 742     if (children)
 743         XFree(children);
 744     if (res)
 745         return parent;
 746     else
 747         return (Window) 0;
 748 #endif
 749 }
 750
 751 void wxApp::Exit()
 752 {
 753     wxApp::CleanUp();
 754
 755     wxAppConsole::Exit();
 756 }
 757