src/gtk/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Julian Smart
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11     #pragma implementation "app.h"
  12 #endif
  13
  14 #include "wx/app.h"
  15 #include "wx/gdicmn.h"
  16 #include "wx/utils.h"
  17 #include "wx/intl.h"
  18 #include "wx/log.h"
  19 #include "wx/memory.h"
  20 #include "wx/font.h"
  21 #include "wx/settings.h"
  22 #include "wx/dialog.h"
  23
  24 #if wxUSE_WX_RESOURCES
  25     #include "wx/resource.h"
  26 #endif
  27
  28 #include "wx/module.h"
  29 #include "wx/image.h"
  30
  31 #if wxUSE_THREADS
  32 #include "wx/thread.h"
  33 #endif
  34
  35 #include "unistd.h"
  36
  37 #include "glib.h"
  38 #include "gdk/gdk.h"
  39 #include "gtk/gtk.h"
  40
  41 #include "wx/gtk/win_gtk.h"
  42
  43 //-----------------------------------------------------------------------------
  44 // global data
  45 //-----------------------------------------------------------------------------
  46
  47 wxApp *wxTheApp = (wxApp *)  NULL;
  48 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
  49
  50 #if wxUSE_THREADS
  51 extern wxList *wxPendingEvents;
  52 extern wxCriticalSection *wxPendingEventsLocker;
  53 #endif
  54 extern wxResourceCache *wxTheResourceCache;
  55 extern bool g_isIdle;
  56
  57 unsigned char g_palette[64*3] =
  58 {
  59   0x0,  0x0,  0x0,
  60   0xff, 0xff, 0xff,
  61   0xff, 0x0,  0x0,
  62   0xff, 0xff, 0x0,
  63   0x0,  0xff, 0x0,
  64   0x0,  0x0,  0xff,
  65   0x0,  0xff, 0xff,
  66   0x99, 0x99, 0x99,
  67   0xff, 0x88, 0x0,
  68   0x88, 0x0,  0x0,
  69   0x0,  0x88, 0x88,
  70   0x88, 0x88, 0x0,
  71   0xff, 0xcc, 0x97,
  72   0xbb, 0xbb, 0xbb,
  73   0x9f, 0x6b, 0x42,
  74   0x55, 0x55, 0x55,
  75   0xdd, 0xdd, 0xdd,
  76   0x77, 0x77, 0x77,
  77   0x33, 0x33, 0x33,
  78   0xcc, 0x0,  0x0,
  79   0xff, 0x44, 0x0,
  80   0xff, 0xcc, 0x0,
  81   0xcc, 0xcc, 0x0,
  82   0x60, 0x60, 0x0,
  83   0x0,  0x43, 0x0,
  84   0x0,  0x7f, 0x0,
  85   0x0,  0xcc, 0x0,
  86   0x0,  0x44, 0x44,
  87   0x0,  0x0,  0x44,
  88   0x0,  0x0,  0x88,
  89   0xef, 0xb1, 0x7b,
  90   0xdf, 0x98, 0x5f,
  91   0xbf, 0x87, 0x56,
  92   0x7f, 0x57, 0x26,
  93   0x5f, 0x39, 0xc,
  94   0x3f, 0x1c, 0x0,
  95   0x21, 0x0,  0x0,
  96   0x0,  0x43, 0x87,
  97   0x2d, 0x70, 0xaf,
  98   0x5a, 0x9e, 0xd7,
  99   0x87, 0xcc, 0xff,
 100   0xff, 0xe0, 0xba,
 101   0x21, 0x43, 0xf,
 102   0x3d, 0x5d, 0x25,
 103   0x59, 0x78, 0x3a,
 104   0x75, 0x93, 0x4f,
 105   0x91, 0xae, 0x64,
 106   0xad, 0xc8, 0x7a,
 107   0xf0, 0xa8, 0xef,
 108   0xd0, 0x88, 0xd0,
 109   0xaf, 0x66, 0xaf,
 110   0x8e, 0x44, 0x8e,
 111   0x6d, 0x22, 0x6d,
 112   0x4b, 0x0,  0x4b,
 113   0xff, 0xc0, 0xbc,
 114   0xff, 0x93, 0x91,
 115   0xff, 0x66, 0x67,
 116   0xd8, 0xf2, 0xbf,
 117   0xff, 0xc9, 0x68,
 118   0xff, 0x96, 0x67,
 119   0xa5, 0x60, 0xff,
 120   0x51, 0xff, 0x99,
 121   0x3f, 0xa5, 0x63,
 122   0x98, 0x90, 0x67
 123 };
 124
 125 //-----------------------------------------------------------------------------
 126 // local functions
 127 //-----------------------------------------------------------------------------
 128
 129 extern void wxFlushResources(void);
 130
 131 //-----------------------------------------------------------------------------
 132 // global functions
 133 //-----------------------------------------------------------------------------
 134
 135 void wxExit()
 136 {
 137     gtk_main_quit();
 138 }
 139
 140 /* forward declaration */
 141 gint wxapp_idle_callback( gpointer WXUNUSED(data) );
 142
 143 bool wxYield()
 144 {
 145     /* it's necessary to call ProcessIdle() to update the frames sizes which
 146        might have been changed (it also will update other things set from
 147        OnUpdateUI() which is a nice (and desired) side effect) */
 148     while (wxTheApp->ProcessIdle()) { }
 149
 150 #if 0
 151     for ( wxWindowList::Node *node = wxTopLevelWindows.GetFirst();
 152           node;
 153           node = node->GetNext() )
 154     {
 155         wxWindow *win = node->GetData();
 156         win->OnInternalIdle();
 157     }
 158 #endif
 159
 160     if (wxTheApp->m_idleTag)
 161     {
 162         /* We need to temporarily remove idle callbacks or the loop will
 163            never finish. */
 164         gtk_idle_remove( wxTheApp->m_idleTag );
 165         wxTheApp->m_idleTag = 0;
 166
 167         while (gtk_events_pending())
 168             gtk_main_iteration();
 169
 170         /* re-add idle handler */
 171         wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 172     }
 173     else
 174     {
 175         while (gtk_events_pending())
 176             gtk_main_iteration();
 177     }
 178
 179     return TRUE;
 180 }
 181
 182 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 183 {
 184     if (!wxTheApp) return TRUE;
 185
 186 #if (GTK_MINOR_VERSION > 0)
 187     /* when getting called from GDK's idle handler we
 188        are no longer within GDK's grab on the GUI
 189        thread so we must lock it here ourselves */
 190     GDK_THREADS_ENTER ();
 191 #endif
 192
 193     /* sent idle event to all who request them */
 194     while (wxTheApp->ProcessIdle()) { }
 195
 196     /* we don't want any more idle events until the next event is
 197        sent to wxGTK */
 198     gtk_idle_remove( wxTheApp->m_idleTag );
 199     wxTheApp->m_idleTag = 0;
 200
 201     /* indicate that we are now in idle mode - even so deeply
 202        in idle mode that we don't get any idle events anymore.
 203        this is like wxMSW where an idle event is sent only
 204        once each time after the event queue has been completely
 205        emptied */
 206     g_isIdle = TRUE;
 207
 208 #if (GTK_MINOR_VERSION > 0)
 209     /* release lock again */
 210     GDK_THREADS_LEAVE ();
 211 #endif
 212
 213     return TRUE;
 214 }
 215
 216 void wxapp_install_idle_handler()
 217 {
 218     wxASSERT_MSG( wxTheApp->m_idleTag == 0, _T("attempt to install idle handler twice") );
 219
 220     /* this routine gets called by all event handlers
 221        indicating that the idle is over. */
 222
 223     wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 224
 225     g_isIdle = FALSE;
 226 }
 227
 228 #if wxUSE_THREADS
 229 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 230 {
 231     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 232     wxTheApp->m_wakeUpTimerTag = 0;
 233
 234 #if (GTK_MINOR_VERSION > 0)
 235     /* when getting called from GDK's time-out handler
 236        we are no longer within GDK's grab on the GUI
 237        thread so we must lock it here ourselves */
 238     GDK_THREADS_ENTER ();
 239 #endif
 240
 241     /* unblock other threads wishing to do some GUI things */
 242     wxMutexGuiLeave();
 243
 244     /* wake up other threads */
 245     wxUsleep( 1 );
 246
 247     /* block other thread again  */
 248     wxMutexGuiEnter();
 249
 250 #if (GTK_MINOR_VERSION > 0)
 251     /* release lock again */
 252     GDK_THREADS_LEAVE ();
 253 #endif
 254
 255     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 20, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 256
 257     return TRUE;
 258 }
 259 #endif
 260
 261 //-----------------------------------------------------------------------------
 262 // wxApp
 263 //-----------------------------------------------------------------------------
 264
 265 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 266
 267 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 268     EVT_IDLE(wxApp::OnIdle)
 269 END_EVENT_TABLE()
 270
 271 wxApp::wxApp()
 272 {
 273     wxTheApp = this;
 274
 275     m_topWindow = (wxWindow *) NULL;
 276     m_exitOnFrameDelete = TRUE;
 277
 278     m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 279
 280 #if wxUSE_THREADS
 281     m_wakeUpTimerTag = gtk_timeout_add( 20, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 282 #endif
 283
 284     m_colorCube = (unsigned char*) NULL;
 285 }
 286
 287 wxApp::~wxApp()
 288 {
 289     if (m_idleTag) gtk_idle_remove( m_idleTag );
 290
 291 #if wxUSE_THREADS
 292     if (m_wakeUpTimerTag) gtk_timeout_remove( m_wakeUpTimerTag );
 293 #endif
 294
 295     if (m_colorCube) free(m_colorCube);
 296 }
 297
 298 bool wxApp::OnInitGui()
 299 {
 300     GdkVisual *visual = gdk_visual_get_system();
 301
 302     /* on some machines, the default visual is just 256 colours, so
 303        we make sure we get the best. this can sometimes be wasteful,
 304        of course, but what do these guys pay $30.000 for? */
 305 /*
 306     if (gdk_visual_get_best() != gdk_visual_get_system())
 307     {
 308         GdkVisual* vis = gdk_visual_get_best();
 309         gtk_widget_set_default_visual( vis );
 310
 311         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 312         gtk_widget_set_default_colormap( colormap );
 313
 314         visual = vis;
 315     }
 316 */
 317
 318     /* Nothing to do for 15, 16, 24, 32 bit displays */
 319     if (visual->depth > 8) return TRUE;
 320
 321         /* this initiates the standard palette as defined by GdkImlib
 322            in the GNOME libraries. it ensures that all GNOME applications
 323            use the same 64 colormap entries on 8-bit displays so you
 324            can use several rather graphics-heavy applications at the
 325            same time.
 326            NOTE: this doesn't really seem to work this way... */
 327
 328         /*
 329         GdkColormap *cmap = gdk_colormap_new( gdk_visual_get_system(), TRUE );
 330
 331         for (int i = 0; i < 64; i++)
 332         {
 333             GdkColor col;
 334             col.red    = g_palette[i*3 + 0] << 8;
 335             col.green  = g_palette[i*3 + 1] << 8;
 336             col.blue   = g_palette[i*3 + 2] << 8;
 337             col.pixel  = 0;
 338
 339             gdk_color_alloc( cmap, &col );
 340         }
 341
 342         gtk_widget_set_default_colormap( cmap );
 343         */
 344
 345     /* initialize color cube for 8-bit color reduction dithering */
 346
 347     GdkColormap *cmap = gtk_widget_get_default_colormap();
 348
 349     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 350
 351     for (int r = 0; r < 32; r++)
 352     {
 353         for (int g = 0; g < 32; g++)
 354         {
 355             for (int b = 0; b < 32; b++)
 356             {
 357                 int rr = (r << 3) | (r >> 2);
 358                 int gg = (g << 3) | (g >> 2);
 359                 int bb = (b << 3) | (b >> 2);
 360
 361                 int index = -1;
 362
 363                 GdkColor *colors = cmap->colors;
 364                 if (colors)
 365                 {
 366                     int max = 3 * 65536;
 367
 368                     for (int i = 0; i < cmap->size; i++)
 369                     {
 370                         int rdiff = ((rr << 8) - colors[i].red);
 371                         int gdiff = ((gg << 8) - colors[i].green);
 372                         int bdiff = ((bb << 8) - colors[i].blue);
 373                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 374                         if (sum < max)
 375                         {
 376                             index = i; max = sum;
 377                         }
 378                     }
 379                 }
 380                 else
 381                 {
 382 #if (GTK_MINOR_VERSION > 0)
 383                     /* assume 8-bit true or static colors. this really
 384                        exists. */
 385                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 386                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 387                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 388                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 389 #else
 390                     wxFAIL_MSG( _T("Unsupported graphics hardware") );
 391 #endif
 392                 }
 393                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 394             }
 395         }
 396     }
 397
 398     return TRUE;
 399 }
 400
 401 bool wxApp::ProcessIdle()
 402 {
 403     wxIdleEvent event;
 404     event.SetEventObject( this );
 405     ProcessEvent( event );
 406
 407     return event.MoreRequested();
 408 }
 409
 410 void wxApp::OnIdle( wxIdleEvent &event )
 411 {
 412     static bool inOnIdle = FALSE;
 413
 414     /* Avoid recursion (via ProcessEvent default case) */
 415     if (inOnIdle)
 416         return;
 417
 418     inOnIdle = TRUE;
 419
 420 #if wxUSE_THREADS
 421     /* Resend in the main thread events which have been prepared in other
 422        threads */
 423     ProcessPendingEvents();
 424 #endif
 425
 426     /* 'Garbage' collection of windows deleted with Close(). */
 427     DeletePendingObjects();
 428
 429     /* flush the logged messages if any */
 430 #if wxUSE_LOG
 431     wxLog *log = wxLog::GetActiveTarget();
 432     if (log != NULL && log->HasPendingMessages())
 433         log->Flush();
 434 #endif // wxUSE_LOG
 435
 436     /* Send OnIdle events to all windows */
 437     bool needMore = SendIdleEvents();
 438
 439     if (needMore)
 440         event.RequestMore(TRUE);
 441
 442     inOnIdle = FALSE;
 443 }
 444
 445 bool wxApp::SendIdleEvents()
 446 {
 447     bool needMore = FALSE;
 448
 449     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 450     while (node)
 451     {
 452         wxWindow* win = node->GetData();
 453         if (SendIdleEvents(win))
 454             needMore = TRUE;
 455         node = node->GetNext();
 456     }
 457
 458     return needMore;
 459 }
 460
 461 bool wxApp::SendIdleEvents( wxWindow* win )
 462 {
 463     bool needMore = FALSE;
 464
 465     wxIdleEvent event;
 466     event.SetEventObject(win);
 467
 468     win->OnInternalIdle();
 469
 470     win->ProcessEvent(event);
 471
 472     if (event.MoreRequested())
 473         needMore = TRUE;
 474
 475     wxNode* node = win->GetChildren().First();
 476     while (node)
 477     {
 478         wxWindow* win = (wxWindow*) node->Data();
 479         if (SendIdleEvents(win))
 480             needMore = TRUE;
 481
 482         node = node->Next();
 483     }
 484     return needMore ;
 485 }
 486
 487 int wxApp::MainLoop()
 488 {
 489     gtk_main();
 490     return 0;
 491 }
 492
 493 void wxApp::ExitMainLoop()
 494 {
 495     gtk_main_quit();
 496 }
 497
 498 bool wxApp::Initialized()
 499 {
 500     return m_initialized;
 501 }
 502
 503 bool wxApp::Pending()
 504 {
 505     return (gtk_events_pending() > 0);
 506 }
 507
 508 void wxApp::Dispatch()
 509 {
 510     gtk_main_iteration();
 511 }
 512
 513 #if wxUSE_THREADS
 514 void wxApp::ProcessPendingEvents()
 515 {
 516     wxNode *node = wxPendingEvents->First();
 517     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 518
 519     while (node)
 520     {
 521         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 522
 523         handler->ProcessPendingEvents();
 524
 525         delete node;
 526
 527         node = wxPendingEvents->First();
 528     }
 529 }
 530 #endif // wxUSE_THREADS
 531
 532 void wxApp::DeletePendingObjects()
 533 {
 534     wxNode *node = wxPendingDelete.First();
 535     while (node)
 536     {
 537         wxObject *obj = (wxObject *)node->Data();
 538
 539         delete obj;
 540
 541         if (wxPendingDelete.Find(obj))
 542             delete node;
 543
 544         node = wxPendingDelete.First();
 545     }
 546 }
 547
 548 wxWindow *wxApp::GetTopWindow()
 549 {
 550     if (m_topWindow)
 551         return m_topWindow;
 552     else if (wxTopLevelWindows.GetCount() > 0)
 553         return wxTopLevelWindows.GetFirst()->GetData();
 554     else
 555         return NULL;
 556 }
 557
 558 void wxApp::SetTopWindow( wxWindow *win )
 559 {
 560     m_topWindow = win;
 561 }
 562
 563 bool wxApp::Initialize()
 564 {
 565     wxBuffer = new wxChar[BUFSIZ + 512];
 566
 567     wxClassInfo::InitializeClasses();
 568
 569     wxSystemSettings::Init();
 570
 571     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 572     // create a module for that as it's part of the core.
 573 #if wxUSE_THREADS
 574     wxPendingEvents = new wxList();
 575     wxPendingEventsLocker = new wxCriticalSection();
 576 #endif
 577
 578 /*
 579     wxTheFontNameDirectory =  new wxFontNameDirectory;
 580     wxTheFontNameDirectory->Initialize();
 581 */
 582
 583     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 584     wxTheColourDatabase->Initialize();
 585
 586     wxInitializeStockLists();
 587     wxInitializeStockObjects();
 588
 589 #if wxUSE_WX_RESOURCES
 590     wxTheResourceCache = new wxResourceCache( wxKEY_STRING );
 591
 592     wxInitializeResourceSystem();
 593 #endif
 594
 595     wxImage::InitStandardHandlers();
 596
 597     wxModule::RegisterModules();
 598     if (!wxModule::InitializeModules()) return FALSE;
 599
 600     return TRUE;
 601 }
 602
 603 void wxApp::CleanUp()
 604 {
 605     wxModule::CleanUpModules();
 606
 607 #if wxUSE_WX_RESOURCES
 608     wxFlushResources();
 609
 610     if (wxTheResourceCache)
 611         delete wxTheResourceCache;
 612     wxTheResourceCache = (wxResourceCache*) NULL;
 613
 614     wxCleanUpResourceSystem();
 615 #endif
 616
 617     if (wxTheColourDatabase)
 618         delete wxTheColourDatabase;
 619     wxTheColourDatabase = (wxColourDatabase*) NULL;
 620
 621 /*
 622     if (wxTheFontNameDirectory) delete wxTheFontNameDirectory;
 623     wxTheFontNameDirectory = (wxFontNameDirectory*) NULL;
 624 */
 625
 626     wxDeleteStockObjects();
 627
 628     wxDeleteStockLists();
 629
 630     wxImage::CleanUpHandlers();
 631
 632     delete wxTheApp;
 633     wxTheApp = (wxApp*) NULL;
 634
 635     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 636     // create a module for that as it's part of the core.
 637 #if wxUSE_THREADS
 638     delete wxPendingEvents;
 639     delete wxPendingEventsLocker;
 640 #endif
 641
 642     wxSystemSettings::Done();
 643
 644     delete[] wxBuffer;
 645
 646     wxClassInfo::CleanUpClasses();
 647
 648     // check for memory leaks
 649 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 650     if (wxDebugContext::CountObjectsLeft() > 0)
 651     {
 652         wxLogDebug(_T("There were memory leaks.\n"));
 653         wxDebugContext::Dump();
 654         wxDebugContext::PrintStatistics();
 655     }
 656 #endif // Debug
 657
 658 #if wxUSE_LOG
 659     // do this as the very last thing because everything else can log messages
 660     wxLog::DontCreateOnDemand();
 661
 662     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 663     if (oldLog)
 664         delete oldLog;
 665 }
 666
 667 wxLog *wxApp::CreateLogTarget()
 668 {
 669     return new wxLogGui;
 670 }
 671 #endif // wxUSE_LOG
 672
 673 //-----------------------------------------------------------------------------
 674 // wxEntry
 675 //-----------------------------------------------------------------------------
 676
 677 int wxEntry( int argc, char *argv[] )
 678 {
 679     gtk_set_locale();
 680
 681     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 682
 683     gtk_init( &argc, &argv );
 684
 685     wxSetDetectableAutoRepeat( TRUE );
 686
 687     if (!wxApp::Initialize())
 688         return -1;
 689
 690     if (!wxTheApp)
 691     {
 692         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 693                      _T("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 694
 695         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 696
 697         wxObject *test_app = app_ini();
 698
 699         wxTheApp = (wxApp*) test_app;
 700     }
 701
 702     wxCHECK_MSG( wxTheApp, -1, _T("wxWindows error: no application object") );
 703
 704     wxTheApp->argc = argc;
 705     wxTheApp->argv = argv;
 706
 707     wxString name(wxFileNameFromPath(argv[0]));
 708     wxStripExtension( name );
 709     wxTheApp->SetAppName( name );
 710
 711     int retValue = 0;
 712
 713     if ( !wxTheApp->OnInitGui() )
 714         retValue = -1;
 715
 716     // Here frames insert themselves automatically into wxTopLevelWindows by
 717     // getting created in OnInit().
 718     if ( retValue == 0 )
 719     {
 720         if ( !wxTheApp->OnInit() )
 721             retValue = -1;
 722     }
 723
 724     if ( retValue == 0 )
 725     {
 726         /* delete pending toplevel windows (typically a single
 727            dialog) so that, if there isn't any left, we don't
 728            call OnRun() */
 729         wxTheApp->DeletePendingObjects();
 730
 731         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 732
 733         if (wxTheApp->Initialized())
 734         {
 735             retValue = wxTheApp->OnRun();
 736
 737             wxWindow *topWindow = wxTheApp->GetTopWindow();
 738             if (topWindow)
 739             {
 740                 /* Forcibly delete the window. */
 741                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 742                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 743                 {
 744                     topWindow->Close( TRUE );
 745                     wxTheApp->DeletePendingObjects();
 746                 }
 747                 else
 748                 {
 749                     delete topWindow;
 750                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 751                 }
 752             }
 753             wxTheApp->OnExit();
 754         }
 755     }
 756
 757 #if wxUSE_LOG
 758     // flush the logged messages if any
 759     wxLog *log = wxLog::GetActiveTarget();
 760     if (log != NULL && log->HasPendingMessages())
 761         log->Flush();
 762
 763     // continuing to use user defined log target is unsafe from now on because
 764     // some resources may be already unavailable, so replace it by something
 765     // more safe
 766     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 767     if ( oldlog )
 768         delete oldlog;
 769 #endif // wxUSE_LOG
 770
 771     wxApp::CleanUp();
 772
 773     return retValue;
 774 }
 775