src/gtk1/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 "appbase.h"
  12     #pragma implementation "app.h"
  13 #endif
  14
  15 #include "wx/app.h"
  16 #include "wx/gdicmn.h"
  17 #include "wx/utils.h"
  18 #include "wx/intl.h"
  19 #include "wx/log.h"
  20 #include "wx/memory.h"
  21 #include "wx/font.h"
  22 #include "wx/settings.h"
  23 #include "wx/dialog.h"
  24
  25 #if wxUSE_WX_RESOURCES
  26     #include "wx/resource.h"
  27 #endif
  28
  29 #include "wx/module.h"
  30 #include "wx/image.h"
  31
  32 #if wxUSE_THREADS
  33 #include "wx/thread.h"
  34 #endif
  35
  36 #include "unistd.h"
  37
  38 #include "glib.h"
  39 #include "gdk/gdk.h"
  40 #include "gtk/gtk.h"
  41
  42 #include "wx/gtk/win_gtk.h"
  43
  44 //-----------------------------------------------------------------------------
  45 // global data
  46 //-----------------------------------------------------------------------------
  47
  48 wxApp *wxTheApp = (wxApp *)  NULL;
  49 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  50
  51 #if wxUSE_THREADS
  52 extern wxList *wxPendingEvents;
  53 extern wxCriticalSection *wxPendingEventsLocker;
  54 #endif
  55 extern wxResourceCache *wxTheResourceCache;
  56 extern bool g_isIdle;
  57
  58 unsigned char g_palette[64*3] =
  59 {
  60   0x0,  0x0,  0x0,
  61   0xff, 0xff, 0xff,
  62   0xff, 0x0,  0x0,
  63   0xff, 0xff, 0x0,
  64   0x0,  0xff, 0x0,
  65   0x0,  0x0,  0xff,
  66   0x0,  0xff, 0xff,
  67   0x99, 0x99, 0x99,
  68   0xff, 0x88, 0x0,
  69   0x88, 0x0,  0x0,
  70   0x0,  0x88, 0x88,
  71   0x88, 0x88, 0x0,
  72   0xff, 0xcc, 0x97,
  73   0xbb, 0xbb, 0xbb,
  74   0x9f, 0x6b, 0x42,
  75   0x55, 0x55, 0x55,
  76   0xdd, 0xdd, 0xdd,
  77   0x77, 0x77, 0x77,
  78   0x33, 0x33, 0x33,
  79   0xcc, 0x0,  0x0,
  80   0xff, 0x44, 0x0,
  81   0xff, 0xcc, 0x0,
  82   0xcc, 0xcc, 0x0,
  83   0x60, 0x60, 0x0,
  84   0x0,  0x43, 0x0,
  85   0x0,  0x7f, 0x0,
  86   0x0,  0xcc, 0x0,
  87   0x0,  0x44, 0x44,
  88   0x0,  0x0,  0x44,
  89   0x0,  0x0,  0x88,
  90   0xef, 0xb1, 0x7b,
  91   0xdf, 0x98, 0x5f,
  92   0xbf, 0x87, 0x56,
  93   0x7f, 0x57, 0x26,
  94   0x5f, 0x39, 0xc,
  95   0x3f, 0x1c, 0x0,
  96   0x21, 0x0,  0x0,
  97   0x0,  0x43, 0x87,
  98   0x2d, 0x70, 0xaf,
  99   0x5a, 0x9e, 0xd7,
 100   0x87, 0xcc, 0xff,
 101   0xff, 0xe0, 0xba,
 102   0x21, 0x43, 0xf,
 103   0x3d, 0x5d, 0x25,
 104   0x59, 0x78, 0x3a,
 105   0x75, 0x93, 0x4f,
 106   0x91, 0xae, 0x64,
 107   0xad, 0xc8, 0x7a,
 108   0xf0, 0xa8, 0xef,
 109   0xd0, 0x88, 0xd0,
 110   0xaf, 0x66, 0xaf,
 111   0x8e, 0x44, 0x8e,
 112   0x6d, 0x22, 0x6d,
 113   0x4b, 0x0,  0x4b,
 114   0xff, 0xc0, 0xbc,
 115   0xff, 0x93, 0x91,
 116   0xff, 0x66, 0x67,
 117   0xd8, 0xf2, 0xbf,
 118   0xff, 0xc9, 0x68,
 119   0xff, 0x96, 0x67,
 120   0xa5, 0x60, 0xff,
 121   0x51, 0xff, 0x99,
 122   0x3f, 0xa5, 0x63,
 123   0x98, 0x90, 0x67
 124 };
 125
 126 //-----------------------------------------------------------------------------
 127 // local functions
 128 //-----------------------------------------------------------------------------
 129
 130 extern void wxFlushResources(void);
 131
 132 //-----------------------------------------------------------------------------
 133 // global functions
 134 //-----------------------------------------------------------------------------
 135
 136 void wxExit()
 137 {
 138     gtk_main_quit();
 139 }
 140
 141 /* forward declaration */
 142 gint wxapp_idle_callback( gpointer WXUNUSED(data) );
 143
 144 bool wxYield()
 145 {
 146     /* it's necessary to call ProcessIdle() to update the frames sizes which
 147        might have been changed (it also will update other things set from
 148        OnUpdateUI() which is a nice (and desired) side effect) */
 149     while (wxTheApp->ProcessIdle()) { }
 150
 151 #if 0
 152     for ( wxWindowList::Node *node = wxTopLevelWindows.GetFirst();
 153           node;
 154           node = node->GetNext() )
 155     {
 156         wxWindow *win = node->GetData();
 157         win->OnInternalIdle();
 158     }
 159 #endif
 160
 161     if (wxTheApp->m_idleTag)
 162     {
 163         /* We need to temporarily remove idle callbacks or the loop will
 164            never finish. */
 165         gtk_idle_remove( wxTheApp->m_idleTag );
 166         wxTheApp->m_idleTag = 0;
 167
 168         while (gtk_events_pending())
 169             gtk_main_iteration();
 170
 171         /* re-add idle handler */
 172         wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 173     }
 174     else
 175     {
 176         while (gtk_events_pending())
 177             gtk_main_iteration();
 178     }
 179
 180     return TRUE;
 181 }
 182
 183 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 184 {
 185     if (!wxTheApp) return TRUE;
 186
 187 #if (GTK_MINOR_VERSION > 0)
 188     /* when getting called from GDK's idle handler we
 189        are no longer within GDK's grab on the GUI
 190        thread so we must lock it here ourselves */
 191     GDK_THREADS_ENTER ();
 192 #endif
 193
 194     /* sent idle event to all who request them */
 195     while (wxTheApp->ProcessIdle()) { }
 196
 197     /* we don't want any more idle events until the next event is
 198        sent to wxGTK */
 199     gtk_idle_remove( wxTheApp->m_idleTag );
 200     wxTheApp->m_idleTag = 0;
 201
 202     /* indicate that we are now in idle mode - even so deeply
 203        in idle mode that we don't get any idle events anymore.
 204        this is like wxMSW where an idle event is sent only
 205        once each time after the event queue has been completely
 206        emptied */
 207     g_isIdle = TRUE;
 208
 209 #if (GTK_MINOR_VERSION > 0)
 210     /* release lock again */
 211     GDK_THREADS_LEAVE ();
 212 #endif
 213
 214     return TRUE;
 215 }
 216
 217 void wxapp_install_idle_handler()
 218 {
 219     wxASSERT_MSG( wxTheApp->m_idleTag == 0, _T("attempt to install idle handler twice") );
 220
 221     /* this routine gets called by all event handlers
 222        indicating that the idle is over. */
 223
 224     wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 225
 226     g_isIdle = FALSE;
 227 }
 228
 229 /*
 230 #if wxUSE_THREADS
 231 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 232 {
 233     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 234     wxTheApp->m_wakeUpTimerTag = 0;
 235
 236 #if (GTK_MINOR_VERSION > 0)
 237     // when getting called from GDK's time-out handler
 238     // we are no longer within GDK's grab on the GUI
 239     // thread so we must lock it here ourselves
 240     GDK_THREADS_ENTER ();
 241 #endif
 242
 243     // unblock other threads wishing to do some GUI things
 244     wxMutexGuiLeave();
 245
 246     // wake up other threads
 247     wxUsleep( 1 );
 248
 249     // block other thread again
 250     wxMutexGuiEnter();
 251
 252 #if (GTK_MINOR_VERSION > 0)
 253     // release lock again
 254     GDK_THREADS_LEAVE ();
 255 #endif
 256
 257     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 20, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 258
 259     return TRUE;
 260 }
 261 #endif
 262 */
 263
 264 //-----------------------------------------------------------------------------
 265 // wxApp
 266 //-----------------------------------------------------------------------------
 267
 268 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 269
 270 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 271     EVT_IDLE(wxApp::OnIdle)
 272 END_EVENT_TABLE()
 273
 274 wxApp::wxApp()
 275 {
 276     wxTheApp = this;
 277
 278     m_topWindow = (wxWindow *) NULL;
 279     m_exitOnFrameDelete = TRUE;
 280
 281     m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 282
 283 /*
 284 #if wxUSE_THREADS
 285     m_wakeUpTimerTag = gtk_timeout_add( 20, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 286 #endif
 287 */
 288
 289     m_colorCube = (unsigned char*) NULL;
 290 }
 291
 292 wxApp::~wxApp()
 293 {
 294     if (m_idleTag) gtk_idle_remove( m_idleTag );
 295
 296 /*
 297 #if wxUSE_THREADS
 298     if (m_wakeUpTimerTag) gtk_timeout_remove( m_wakeUpTimerTag );
 299 #endif
 300 */
 301
 302     if (m_colorCube) free(m_colorCube);
 303 }
 304
 305 bool wxApp::OnInitGui()
 306 {
 307     GdkVisual *visual = gdk_visual_get_system();
 308
 309     /* on some machines, the default visual is just 256 colours, so
 310        we make sure we get the best. this can sometimes be wasteful,
 311        of course, but what do these guys pay $30.000 for? */
 312 /*
 313     if (gdk_visual_get_best() != gdk_visual_get_system())
 314     {
 315         GdkVisual* vis = gdk_visual_get_best();
 316         gtk_widget_set_default_visual( vis );
 317
 318         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 319         gtk_widget_set_default_colormap( colormap );
 320
 321         visual = vis;
 322     }
 323 */
 324
 325     /* Nothing to do for 15, 16, 24, 32 bit displays */
 326     if (visual->depth > 8) return TRUE;
 327
 328         /* this initiates the standard palette as defined by GdkImlib
 329            in the GNOME libraries. it ensures that all GNOME applications
 330            use the same 64 colormap entries on 8-bit displays so you
 331            can use several rather graphics-heavy applications at the
 332            same time.
 333            NOTE: this doesn't really seem to work this way... */
 334
 335         /*
 336         GdkColormap *cmap = gdk_colormap_new( gdk_visual_get_system(), TRUE );
 337
 338         for (int i = 0; i < 64; i++)
 339         {
 340             GdkColor col;
 341             col.red    = g_palette[i*3 + 0] << 8;
 342             col.green  = g_palette[i*3 + 1] << 8;
 343             col.blue   = g_palette[i*3 + 2] << 8;
 344             col.pixel  = 0;
 345
 346             gdk_color_alloc( cmap, &col );
 347         }
 348
 349         gtk_widget_set_default_colormap( cmap );
 350         */
 351
 352     /* initialize color cube for 8-bit color reduction dithering */
 353
 354     GdkColormap *cmap = gtk_widget_get_default_colormap();
 355
 356     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 357
 358     for (int r = 0; r < 32; r++)
 359     {
 360         for (int g = 0; g < 32; g++)
 361         {
 362             for (int b = 0; b < 32; b++)
 363             {
 364                 int rr = (r << 3) | (r >> 2);
 365                 int gg = (g << 3) | (g >> 2);
 366                 int bb = (b << 3) | (b >> 2);
 367
 368                 int index = -1;
 369
 370                 GdkColor *colors = cmap->colors;
 371                 if (colors)
 372                 {
 373                     int max = 3 * 65536;
 374
 375                     for (int i = 0; i < cmap->size; i++)
 376                     {
 377                         int rdiff = ((rr << 8) - colors[i].red);
 378                         int gdiff = ((gg << 8) - colors[i].green);
 379                         int bdiff = ((bb << 8) - colors[i].blue);
 380                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 381                         if (sum < max)
 382                         {
 383                             index = i; max = sum;
 384                         }
 385                     }
 386                 }
 387                 else
 388                 {
 389 #if (GTK_MINOR_VERSION > 0)
 390                     /* assume 8-bit true or static colors. this really
 391                        exists. */
 392                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 393                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 394                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 395                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 396 #else
 397                     wxFAIL_MSG( _T("Unsupported graphics hardware") );
 398 #endif
 399                 }
 400                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 401             }
 402         }
 403     }
 404
 405     return TRUE;
 406 }
 407
 408 bool wxApp::ProcessIdle()
 409 {
 410     wxIdleEvent event;
 411     event.SetEventObject( this );
 412     ProcessEvent( event );
 413
 414     return event.MoreRequested();
 415 }
 416
 417 void wxApp::OnIdle( wxIdleEvent &event )
 418 {
 419     static bool inOnIdle = FALSE;
 420
 421     /* Avoid recursion (via ProcessEvent default case) */
 422     if (inOnIdle)
 423         return;
 424
 425     inOnIdle = TRUE;
 426
 427 #if wxUSE_THREADS
 428     /* Resend in the main thread events which have been prepared in other
 429        threads */
 430     ProcessPendingEvents();
 431 #endif
 432
 433     /* 'Garbage' collection of windows deleted with Close(). */
 434     DeletePendingObjects();
 435
 436     /* flush the logged messages if any */
 437 #if wxUSE_LOG
 438     wxLog *log = wxLog::GetActiveTarget();
 439     if (log != NULL && log->HasPendingMessages())
 440         log->Flush();
 441 #endif // wxUSE_LOG
 442
 443     /* Send OnIdle events to all windows */
 444     bool needMore = SendIdleEvents();
 445
 446     if (needMore)
 447         event.RequestMore(TRUE);
 448
 449     inOnIdle = FALSE;
 450 }
 451
 452 bool wxApp::SendIdleEvents()
 453 {
 454     bool needMore = FALSE;
 455
 456     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 457     while (node)
 458     {
 459         wxWindow* win = node->GetData();
 460         if (SendIdleEvents(win))
 461             needMore = TRUE;
 462         node = node->GetNext();
 463     }
 464
 465     return needMore;
 466 }
 467
 468 bool wxApp::SendIdleEvents( wxWindow* win )
 469 {
 470     bool needMore = FALSE;
 471
 472     wxIdleEvent event;
 473     event.SetEventObject(win);
 474
 475     win->OnInternalIdle();
 476
 477     win->ProcessEvent(event);
 478
 479     if (event.MoreRequested())
 480         needMore = TRUE;
 481
 482     wxNode* node = win->GetChildren().First();
 483     while (node)
 484     {
 485         wxWindow* win = (wxWindow*) node->Data();
 486         if (SendIdleEvents(win))
 487             needMore = TRUE;
 488
 489         node = node->Next();
 490     }
 491     return needMore ;
 492 }
 493
 494 int wxApp::MainLoop()
 495 {
 496     gtk_main();
 497     return 0;
 498 }
 499
 500 void wxApp::ExitMainLoop()
 501 {
 502     gtk_main_quit();
 503 }
 504
 505 bool wxApp::Initialized()
 506 {
 507     return m_initialized;
 508 }
 509
 510 bool wxApp::Pending()
 511 {
 512     return (gtk_events_pending() > 0);
 513 }
 514
 515 void wxApp::Dispatch()
 516 {
 517     gtk_main_iteration();
 518 }
 519
 520 #if wxUSE_THREADS
 521 void wxApp::ProcessPendingEvents()
 522 {
 523     wxNode *node = wxPendingEvents->First();
 524     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 525
 526     while (node)
 527     {
 528         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 529
 530         handler->ProcessPendingEvents();
 531
 532         delete node;
 533
 534         node = wxPendingEvents->First();
 535     }
 536 }
 537 #endif // wxUSE_THREADS
 538
 539 void wxApp::DeletePendingObjects()
 540 {
 541     wxNode *node = wxPendingDelete.First();
 542     while (node)
 543     {
 544         wxObject *obj = (wxObject *)node->Data();
 545
 546         delete obj;
 547
 548         if (wxPendingDelete.Find(obj))
 549             delete node;
 550
 551         node = wxPendingDelete.First();
 552     }
 553 }
 554
 555 bool wxApp::Initialize()
 556 {
 557     wxBuffer = new wxChar[BUFSIZ + 512];
 558
 559     wxClassInfo::InitializeClasses();
 560
 561     wxSystemSettings::Init();
 562
 563     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 564     // create a module for that as it's part of the core.
 565 #if wxUSE_THREADS
 566     wxPendingEvents = new wxList();
 567     wxPendingEventsLocker = new wxCriticalSection();
 568 #endif
 569
 570 /*
 571     wxTheFontNameDirectory =  new wxFontNameDirectory;
 572     wxTheFontNameDirectory->Initialize();
 573 */
 574
 575     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 576     wxTheColourDatabase->Initialize();
 577
 578     wxInitializeStockLists();
 579     wxInitializeStockObjects();
 580
 581 #if wxUSE_WX_RESOURCES
 582     wxTheResourceCache = new wxResourceCache( wxKEY_STRING );
 583
 584     wxInitializeResourceSystem();
 585 #endif
 586
 587     wxImage::InitStandardHandlers();
 588
 589     wxModule::RegisterModules();
 590     if (!wxModule::InitializeModules()) return FALSE;
 591
 592     return TRUE;
 593 }
 594
 595 void wxApp::CleanUp()
 596 {
 597     wxModule::CleanUpModules();
 598
 599 #if wxUSE_WX_RESOURCES
 600     wxFlushResources();
 601
 602     if (wxTheResourceCache)
 603         delete wxTheResourceCache;
 604     wxTheResourceCache = (wxResourceCache*) NULL;
 605
 606     wxCleanUpResourceSystem();
 607 #endif
 608
 609     if (wxTheColourDatabase)
 610         delete wxTheColourDatabase;
 611     wxTheColourDatabase = (wxColourDatabase*) NULL;
 612
 613 /*
 614     if (wxTheFontNameDirectory) delete wxTheFontNameDirectory;
 615     wxTheFontNameDirectory = (wxFontNameDirectory*) NULL;
 616 */
 617
 618     wxDeleteStockObjects();
 619
 620     wxDeleteStockLists();
 621
 622     wxImage::CleanUpHandlers();
 623
 624     delete wxTheApp;
 625     wxTheApp = (wxApp*) NULL;
 626
 627     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 628     // create a module for that as it's part of the core.
 629 #if wxUSE_THREADS
 630     delete wxPendingEvents;
 631     delete wxPendingEventsLocker;
 632 #endif
 633
 634     wxSystemSettings::Done();
 635
 636     delete[] wxBuffer;
 637
 638     wxClassInfo::CleanUpClasses();
 639
 640     // check for memory leaks
 641 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 642     if (wxDebugContext::CountObjectsLeft() > 0)
 643     {
 644         wxLogDebug(_T("There were memory leaks.\n"));
 645         wxDebugContext::Dump();
 646         wxDebugContext::PrintStatistics();
 647     }
 648 #endif // Debug
 649
 650 #if wxUSE_LOG
 651     // do this as the very last thing because everything else can log messages
 652     wxLog::DontCreateOnDemand();
 653
 654     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 655     if (oldLog)
 656         delete oldLog;
 657 }
 658
 659 #endif // wxUSE_LOG
 660
 661 //-----------------------------------------------------------------------------
 662 // wxEntry
 663 //-----------------------------------------------------------------------------
 664
 665 int wxEntry( int argc, char *argv[] )
 666 {
 667     gtk_set_locale();
 668
 669     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 670
 671     gtk_init( &argc, &argv );
 672
 673     wxSetDetectableAutoRepeat( TRUE );
 674
 675     if (!wxApp::Initialize())
 676         return -1;
 677
 678     if (!wxTheApp)
 679     {
 680         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 681                      _T("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 682
 683         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 684
 685         wxObject *test_app = app_ini();
 686
 687         wxTheApp = (wxApp*) test_app;
 688     }
 689
 690     wxCHECK_MSG( wxTheApp, -1, _T("wxWindows error: no application object") );
 691
 692     wxTheApp->argc = argc;
 693     wxTheApp->argv = argv;
 694
 695     wxString name(wxFileNameFromPath(argv[0]));
 696     wxStripExtension( name );
 697     wxTheApp->SetAppName( name );
 698
 699     int retValue = 0;
 700
 701     if ( !wxTheApp->OnInitGui() )
 702         retValue = -1;
 703
 704     // Here frames insert themselves automatically into wxTopLevelWindows by
 705     // getting created in OnInit().
 706     if ( retValue == 0 )
 707     {
 708         if ( !wxTheApp->OnInit() )
 709             retValue = -1;
 710     }
 711
 712     if ( retValue == 0 )
 713     {
 714         /* delete pending toplevel windows (typically a single
 715            dialog) so that, if there isn't any left, we don't
 716            call OnRun() */
 717         wxTheApp->DeletePendingObjects();
 718
 719         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 720
 721         if (wxTheApp->Initialized())
 722         {
 723             retValue = wxTheApp->OnRun();
 724
 725             wxWindow *topWindow = wxTheApp->GetTopWindow();
 726             if (topWindow)
 727             {
 728                 /* Forcibly delete the window. */
 729                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 730                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 731                 {
 732                     topWindow->Close( TRUE );
 733                     wxTheApp->DeletePendingObjects();
 734                 }
 735                 else
 736                 {
 737                     delete topWindow;
 738                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 739                 }
 740             }
 741             wxTheApp->OnExit();
 742         }
 743     }
 744
 745 #if wxUSE_LOG
 746     // flush the logged messages if any
 747     wxLog *log = wxLog::GetActiveTarget();
 748     if (log != NULL && log->HasPendingMessages())
 749         log->Flush();
 750
 751     // continuing to use user defined log target is unsafe from now on because
 752     // some resources may be already unavailable, so replace it by something
 753     // more safe
 754     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 755     if ( oldlog )
 756         delete oldlog;
 757 #endif // wxUSE_LOG
 758
 759     wxApp::CleanUp();
 760
 761     return retValue;
 762 }
 763
 764 #include "wx/gtk/info.xpm"
 765 #include "wx/gtk/error.xpm"
 766 #include "wx/gtk/question.xpm"
 767 #include "wx/gtk/warning.xpm"
 768
 769 wxIcon
 770 wxApp::GetStdIcon(int which) const
 771 {
 772     switch(which)
 773     {
 774         case wxICON_INFORMATION:
 775             return wxIcon(info_xpm);
 776
 777         case wxICON_QUESTION:
 778             return wxIcon(question_xpm);
 779
 780         case wxICON_EXCLAMATION:
 781             return wxIcon(warning_xpm);
 782
 783         default:
 784             wxFAIL_MSG("requested non existent standard icon");
 785             // still fall through
 786
 787         case wxICON_HAND:
 788             return wxIcon(error_xpm);
 789     }
 790 }