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