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 wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  49
  50 extern wxResourceCache *wxTheResourceCache;
  51 extern bool g_isIdle;
  52
  53 unsigned char g_palette[64*3] =
  54 {
  55   0x0,  0x0,  0x0,
  56   0xff, 0xff, 0xff,
  57   0xff, 0x0,  0x0,
  58   0xff, 0xff, 0x0,
  59   0x0,  0xff, 0x0,
  60   0x0,  0x0,  0xff,
  61   0x0,  0xff, 0xff,
  62   0x99, 0x99, 0x99,
  63   0xff, 0x88, 0x0,
  64   0x88, 0x0,  0x0,
  65   0x0,  0x88, 0x88,
  66   0x88, 0x88, 0x0,
  67   0xff, 0xcc, 0x97,
  68   0xbb, 0xbb, 0xbb,
  69   0x9f, 0x6b, 0x42,
  70   0x55, 0x55, 0x55,
  71   0xdd, 0xdd, 0xdd,
  72   0x77, 0x77, 0x77,
  73   0x33, 0x33, 0x33,
  74   0xcc, 0x0,  0x0,
  75   0xff, 0x44, 0x0,
  76   0xff, 0xcc, 0x0,
  77   0xcc, 0xcc, 0x0,
  78   0x60, 0x60, 0x0,
  79   0x0,  0x43, 0x0,
  80   0x0,  0x7f, 0x0,
  81   0x0,  0xcc, 0x0,
  82   0x0,  0x44, 0x44,
  83   0x0,  0x0,  0x44,
  84   0x0,  0x0,  0x88,
  85   0xef, 0xb1, 0x7b,
  86   0xdf, 0x98, 0x5f,
  87   0xbf, 0x87, 0x56,
  88   0x7f, 0x57, 0x26,
  89   0x5f, 0x39, 0xc,
  90   0x3f, 0x1c, 0x0,
  91   0x21, 0x0,  0x0,
  92   0x0,  0x43, 0x87,
  93   0x2d, 0x70, 0xaf,
  94   0x5a, 0x9e, 0xd7,
  95   0x87, 0xcc, 0xff,
  96   0xff, 0xe0, 0xba,
  97   0x21, 0x43, 0xf,
  98   0x3d, 0x5d, 0x25,
  99   0x59, 0x78, 0x3a,
 100   0x75, 0x93, 0x4f,
 101   0x91, 0xae, 0x64,
 102   0xad, 0xc8, 0x7a,
 103   0xf0, 0xa8, 0xef,
 104   0xd0, 0x88, 0xd0,
 105   0xaf, 0x66, 0xaf,
 106   0x8e, 0x44, 0x8e,
 107   0x6d, 0x22, 0x6d,
 108   0x4b, 0x0,  0x4b,
 109   0xff, 0xc0, 0xbc,
 110   0xff, 0x93, 0x91,
 111   0xff, 0x66, 0x67,
 112   0xd8, 0xf2, 0xbf,
 113   0xff, 0xc9, 0x68,
 114   0xff, 0x96, 0x67,
 115   0xa5, 0x60, 0xff,
 116   0x51, 0xff, 0x99,
 117   0x3f, 0xa5, 0x63,
 118   0x98, 0x90, 0x67
 119 };
 120
 121 //-----------------------------------------------------------------------------
 122 // local functions
 123 //-----------------------------------------------------------------------------
 124
 125 extern void wxFlushResources();
 126
 127 //-----------------------------------------------------------------------------
 128 // global functions
 129 //-----------------------------------------------------------------------------
 130
 131 void wxExit()
 132 {
 133     gtk_main_quit();
 134 }
 135
 136 /* forward declaration */
 137 gint wxapp_idle_callback( gpointer WXUNUSED(data) );
 138
 139 bool wxYield()
 140 {
 141     bool has_idle = (wxTheApp->m_idleTag != 0);
 142
 143     if (has_idle)
 144     {
 145         /* We need to temporarily remove idle callbacks or the loop will
 146            never finish. */
 147         gtk_idle_remove( wxTheApp->m_idleTag );
 148         wxTheApp->m_idleTag = 0;
 149     }
 150
 151     while (gtk_events_pending())
 152         gtk_main_iteration();
 153
 154     /* it's necessary to call ProcessIdle() to update the frames sizes which
 155        might have been changed (it also will update other things set from
 156        OnUpdateUI() which is a nice (and desired) side effect) */
 157     while (wxTheApp->ProcessIdle()) { }
 158
 159     if (has_idle)
 160     {
 161         /* re-add idle handler */
 162         wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 163     }
 164
 165     return TRUE;
 166 }
 167
 168 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 169 {
 170     if (!wxTheApp) return TRUE;
 171
 172 #if (GTK_MINOR_VERSION > 0)
 173     /* when getting called from GDK's idle handler we
 174        are no longer within GDK's grab on the GUI
 175        thread so we must lock it here ourselves */
 176     GDK_THREADS_ENTER ();
 177 #endif
 178
 179     /* sent idle event to all who request them */
 180     while (wxTheApp->ProcessIdle()) { }
 181
 182     /* we don't want any more idle events until the next event is
 183        sent to wxGTK */
 184     gtk_idle_remove( wxTheApp->m_idleTag );
 185     wxTheApp->m_idleTag = 0;
 186
 187     /* indicate that we are now in idle mode - even so deeply
 188        in idle mode that we don't get any idle events anymore.
 189        this is like wxMSW where an idle event is sent only
 190        once each time after the event queue has been completely
 191        emptied */
 192     g_isIdle = TRUE;
 193
 194 #if (GTK_MINOR_VERSION > 0)
 195     /* release lock again */
 196     GDK_THREADS_LEAVE ();
 197 #endif
 198
 199     return TRUE;
 200 }
 201
 202 void wxapp_install_idle_handler()
 203 {
 204     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 205
 206     /* this routine gets called by all event handlers
 207        indicating that the idle is over. */
 208
 209     wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 210
 211     g_isIdle = FALSE;
 212 }
 213
 214 #if wxUSE_THREADS
 215
 216 /* forward declaration */
 217 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
 218
 219 void wxapp_install_thread_wakeup()
 220 {
 221     if (wxTheApp->m_wakeUpTimerTag) return;
 222
 223     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 100, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 224 }
 225
 226 void wxapp_uninstall_thread_wakeup()
 227 {
 228     if (!wxTheApp->m_wakeUpTimerTag) return;
 229
 230     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 231     wxTheApp->m_wakeUpTimerTag = 0;
 232 }
 233
 234 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 235 {
 236     wxapp_uninstall_thread_wakeup();
 237
 238 #if (GTK_MINOR_VERSION > 0)
 239     // when getting called from GDK's time-out handler
 240     // we are no longer within GDK's grab on the GUI
 241     // thread so we must lock it here ourselves
 242     GDK_THREADS_ENTER ();
 243 #endif
 244
 245     // unblock other threads wishing to do some GUI things
 246     wxMutexGuiLeave();
 247
 248     // wake up other threads
 249     wxUsleep( 1 );
 250
 251     // block other thread again
 252     wxMutexGuiEnter();
 253
 254 #if (GTK_MINOR_VERSION > 0)
 255     // release lock again
 256     GDK_THREADS_LEAVE ();
 257 #endif
 258
 259     wxapp_install_thread_wakeup();
 260
 261     return TRUE;
 262 }
 263
 264 #endif // wxUSE_THREADS
 265
 266 //-----------------------------------------------------------------------------
 267 // wxApp
 268 //-----------------------------------------------------------------------------
 269
 270 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 271
 272 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 273     EVT_IDLE(wxApp::OnIdle)
 274 END_EVENT_TABLE()
 275
 276 wxApp::wxApp()
 277 {
 278     wxTheApp = this;
 279
 280     m_topWindow = (wxWindow *) NULL;
 281     m_exitOnFrameDelete = TRUE;
 282
 283     m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 284
 285 #if wxUSE_THREADS
 286     m_wakeUpTimerTag = 0;
 287     wxapp_install_thread_wakeup();
 288 #endif
 289
 290     m_colorCube = (unsigned char*) NULL;
 291 }
 292
 293 wxApp::~wxApp()
 294 {
 295     if (m_idleTag) gtk_idle_remove( m_idleTag );
 296
 297 #if wxUSE_THREADS
 298     wxapp_uninstall_thread_wakeup();
 299 #endif
 300
 301     if (m_colorCube) free(m_colorCube);
 302 }
 303
 304 bool wxApp::OnInitGui()
 305 {
 306     GdkVisual *visual = gdk_visual_get_system();
 307
 308     /* on some machines, the default visual is just 256 colours, so
 309        we make sure we get the best. this can sometimes be wasteful,
 310        of course, but what do these guys pay $30.000 for? */
 311 /*
 312     if (gdk_visual_get_best() != gdk_visual_get_system())
 313     {
 314         GdkVisual* vis = gdk_visual_get_best();
 315         gtk_widget_set_default_visual( vis );
 316
 317         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 318         gtk_widget_set_default_colormap( colormap );
 319
 320         visual = vis;
 321     }
 322 */
 323
 324     /* Nothing to do for 15, 16, 24, 32 bit displays */
 325     if (visual->depth > 8) return TRUE;
 326
 327         /* this initiates the standard palette as defined by GdkImlib
 328            in the GNOME libraries. it ensures that all GNOME applications
 329            use the same 64 colormap entries on 8-bit displays so you
 330            can use several rather graphics-heavy applications at the
 331            same time.
 332            NOTE: this doesn't really seem to work this way... */
 333
 334         /*
 335         GdkColormap *cmap = gdk_colormap_new( gdk_visual_get_system(), TRUE );
 336
 337         for (int i = 0; i < 64; i++)
 338         {
 339             GdkColor col;
 340             col.red    = g_palette[i*3 + 0] << 8;
 341             col.green  = g_palette[i*3 + 1] << 8;
 342             col.blue   = g_palette[i*3 + 2] << 8;
 343             col.pixel  = 0;
 344
 345             gdk_color_alloc( cmap, &col );
 346         }
 347
 348         gtk_widget_set_default_colormap( cmap );
 349         */
 350
 351     /* initialize color cube for 8-bit color reduction dithering */
 352
 353     GdkColormap *cmap = gtk_widget_get_default_colormap();
 354
 355     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 356
 357     for (int r = 0; r < 32; r++)
 358     {
 359         for (int g = 0; g < 32; g++)
 360         {
 361             for (int b = 0; b < 32; b++)
 362             {
 363                 int rr = (r << 3) | (r >> 2);
 364                 int gg = (g << 3) | (g >> 2);
 365                 int bb = (b << 3) | (b >> 2);
 366
 367                 int index = -1;
 368
 369                 GdkColor *colors = cmap->colors;
 370                 if (colors)
 371                 {
 372                     int max = 3 * 65536;
 373
 374                     for (int i = 0; i < cmap->size; i++)
 375                     {
 376                         int rdiff = ((rr << 8) - colors[i].red);
 377                         int gdiff = ((gg << 8) - colors[i].green);
 378                         int bdiff = ((bb << 8) - colors[i].blue);
 379                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 380                         if (sum < max)
 381                         {
 382                             index = i; max = sum;
 383                         }
 384                     }
 385                 }
 386                 else
 387                 {
 388 #if (GTK_MINOR_VERSION > 0)
 389                     /* assume 8-bit true or static colors. this really
 390                        exists. */
 391                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 392                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 393                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 394                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 395 #else
 396                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 397 #endif
 398                 }
 399                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 400             }
 401         }
 402     }
 403
 404     return TRUE;
 405 }
 406
 407 bool wxApp::ProcessIdle()
 408 {
 409     wxIdleEvent event;
 410     event.SetEventObject( this );
 411     ProcessEvent( event );
 412
 413     return event.MoreRequested();
 414 }
 415
 416 void wxApp::OnIdle( wxIdleEvent &event )
 417 {
 418     static bool s_inOnIdle = FALSE;
 419
 420     /* Avoid recursion (via ProcessEvent default case) */
 421     if (s_inOnIdle)
 422         return;
 423
 424     s_inOnIdle = TRUE;
 425
 426     /* Resend in the main thread events which have been prepared in other
 427        threads */
 428     ProcessPendingEvents();
 429
 430     /* 'Garbage' collection of windows deleted with Close(). */
 431     DeletePendingObjects();
 432
 433     /* flush the logged messages if any */
 434 #if wxUSE_LOG
 435     wxLog *log = wxLog::GetActiveTarget();
 436     if (log != NULL && log->HasPendingMessages())
 437         log->Flush();
 438 #endif // wxUSE_LOG
 439
 440     /* Send OnIdle events to all windows */
 441     bool needMore = SendIdleEvents();
 442
 443     if (needMore)
 444         event.RequestMore(TRUE);
 445
 446     s_inOnIdle = FALSE;
 447 }
 448
 449 bool wxApp::SendIdleEvents()
 450 {
 451     bool needMore = FALSE;
 452
 453     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 454     while (node)
 455     {
 456         wxWindow* win = node->GetData();
 457         if (SendIdleEvents(win))
 458             needMore = TRUE;
 459         node = node->GetNext();
 460     }
 461
 462     return needMore;
 463 }
 464
 465 bool wxApp::SendIdleEvents( wxWindow* win )
 466 {
 467     bool needMore = FALSE;
 468
 469     wxIdleEvent event;
 470     event.SetEventObject(win);
 471
 472     win->ProcessEvent(event);
 473
 474     win->OnInternalIdle();
 475
 476     if (event.MoreRequested())
 477         needMore = TRUE;
 478
 479     wxNode* node = win->GetChildren().First();
 480     while (node)
 481     {
 482         wxWindow* win = (wxWindow*) node->Data();
 483         if (SendIdleEvents(win))
 484             needMore = TRUE;
 485
 486         node = node->Next();
 487     }
 488     return needMore ;
 489 }
 490
 491 int wxApp::MainLoop()
 492 {
 493     gtk_main();
 494     return 0;
 495 }
 496
 497 void wxApp::ExitMainLoop()
 498 {
 499     gtk_main_quit();
 500 }
 501
 502 bool wxApp::Initialized()
 503 {
 504     return m_initialized;
 505 }
 506
 507 bool wxApp::Pending()
 508 {
 509     return (gtk_events_pending() > 0);
 510 }
 511
 512 void wxApp::Dispatch()
 513 {
 514     gtk_main_iteration();
 515 }
 516
 517 void wxApp::DeletePendingObjects()
 518 {
 519     wxNode *node = wxPendingDelete.First();
 520     while (node)
 521     {
 522         wxObject *obj = (wxObject *)node->Data();
 523
 524         delete obj;
 525
 526         if (wxPendingDelete.Find(obj))
 527             delete node;
 528
 529         node = wxPendingDelete.First();
 530     }
 531 }
 532
 533 bool wxApp::Initialize()
 534 {
 535     wxBuffer = new wxChar[BUFSIZ + 512];
 536
 537     wxClassInfo::InitializeClasses();
 538
 539     wxSystemSettings::Init();
 540
 541     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 542     // create a module for that as it's part of the core.
 543 #if wxUSE_THREADS
 544     wxPendingEvents = new wxList();
 545     wxPendingEventsLocker = new wxCriticalSection();
 546 #endif
 547
 548 /*
 549     wxTheFontNameDirectory =  new wxFontNameDirectory;
 550     wxTheFontNameDirectory->Initialize();
 551 */
 552
 553     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 554     wxTheColourDatabase->Initialize();
 555
 556     wxInitializeStockLists();
 557     wxInitializeStockObjects();
 558
 559 #if wxUSE_WX_RESOURCES
 560     wxTheResourceCache = new wxResourceCache( wxKEY_STRING );
 561
 562     wxInitializeResourceSystem();
 563 #endif
 564
 565     wxModule::RegisterModules();
 566     if (!wxModule::InitializeModules()) return FALSE;
 567
 568     return TRUE;
 569 }
 570
 571 void wxApp::CleanUp()
 572 {
 573     wxModule::CleanUpModules();
 574
 575 #if wxUSE_WX_RESOURCES
 576     wxFlushResources();
 577
 578     if (wxTheResourceCache)
 579         delete wxTheResourceCache;
 580     wxTheResourceCache = (wxResourceCache*) NULL;
 581
 582     wxCleanUpResourceSystem();
 583 #endif
 584
 585     if (wxTheColourDatabase)
 586         delete wxTheColourDatabase;
 587     wxTheColourDatabase = (wxColourDatabase*) NULL;
 588
 589 /*
 590     if (wxTheFontNameDirectory) delete wxTheFontNameDirectory;
 591     wxTheFontNameDirectory = (wxFontNameDirectory*) NULL;
 592 */
 593
 594     wxDeleteStockObjects();
 595
 596     wxDeleteStockLists();
 597
 598     delete wxTheApp;
 599     wxTheApp = (wxApp*) NULL;
 600
 601     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 602     // create a module for that as it's part of the core.
 603 #if wxUSE_THREADS
 604     delete wxPendingEvents;
 605     delete wxPendingEventsLocker;
 606 #endif
 607
 608     wxSystemSettings::Done();
 609
 610     delete[] wxBuffer;
 611
 612     wxClassInfo::CleanUpClasses();
 613
 614     // check for memory leaks
 615 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 616     if (wxDebugContext::CountObjectsLeft() > 0)
 617     {
 618         wxLogDebug(wxT("There were memory leaks.\n"));
 619         wxDebugContext::Dump();
 620         wxDebugContext::PrintStatistics();
 621     }
 622 #endif // Debug
 623
 624 #if wxUSE_LOG
 625     // do this as the very last thing because everything else can log messages
 626     wxLog::DontCreateOnDemand();
 627
 628     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 629     if (oldLog)
 630         delete oldLog;
 631 #endif // wxUSE_LOG
 632 }
 633
 634 //-----------------------------------------------------------------------------
 635 // wxEntry
 636 //-----------------------------------------------------------------------------
 637
 638 int wxEntry( int argc, char *argv[] )
 639 {
 640     gtk_set_locale();
 641
 642 #if wxUSE_WCHAR_T
 643     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 644 #else
 645     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 646 #endif
 647
 648     gtk_init( &argc, &argv );
 649
 650     wxSetDetectableAutoRepeat( TRUE );
 651
 652     if (!wxApp::Initialize())
 653         return -1;
 654
 655     if (!wxTheApp)
 656     {
 657         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 658                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 659
 660         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 661
 662         wxObject *test_app = app_ini();
 663
 664         wxTheApp = (wxApp*) test_app;
 665     }
 666
 667     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 668
 669     wxTheApp->argc = argc;
 670 #if wxUSE_UNICODE
 671     wxTheApp->argv = new wxChar*[argc+1];
 672     int mb_argc = 0;
 673     while (mb_argc < argc) {
 674       wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 675       mb_argc++;
 676     }
 677     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 678 #else
 679     wxTheApp->argv = argv;
 680 #endif
 681
 682     wxString name(wxFileNameFromPath(argv[0]));
 683     wxStripExtension( name );
 684     wxTheApp->SetAppName( name );
 685
 686     int retValue = 0;
 687
 688     if ( !wxTheApp->OnInitGui() )
 689         retValue = -1;
 690
 691     // Here frames insert themselves automatically into wxTopLevelWindows by
 692     // getting created in OnInit().
 693     if ( retValue == 0 )
 694     {
 695         if ( !wxTheApp->OnInit() )
 696             retValue = -1;
 697     }
 698
 699     if ( retValue == 0 )
 700     {
 701         /* delete pending toplevel windows (typically a single
 702            dialog) so that, if there isn't any left, we don't
 703            call OnRun() */
 704         wxTheApp->DeletePendingObjects();
 705
 706         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 707
 708         if (wxTheApp->Initialized())
 709         {
 710             retValue = wxTheApp->OnRun();
 711
 712             wxWindow *topWindow = wxTheApp->GetTopWindow();
 713             if (topWindow)
 714             {
 715                 /* Forcibly delete the window. */
 716                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 717                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 718                 {
 719                     topWindow->Close( TRUE );
 720                     wxTheApp->DeletePendingObjects();
 721                 }
 722                 else
 723                 {
 724                     delete topWindow;
 725                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 726                 }
 727             }
 728             wxTheApp->OnExit();
 729         }
 730     }
 731
 732 #if wxUSE_LOG
 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 #endif // wxUSE_LOG
 745
 746     wxApp::CleanUp();
 747
 748     return retValue;
 749 }
 750
 751 #include "wx/gtk/info.xpm"
 752 #include "wx/gtk/error.xpm"
 753 #include "wx/gtk/question.xpm"
 754 #include "wx/gtk/warning.xpm"
 755
 756 wxIcon
 757 wxApp::GetStdIcon(int which) const
 758 {
 759     switch(which)
 760     {
 761         case wxICON_INFORMATION:
 762             return wxIcon(info_xpm);
 763
 764         case wxICON_QUESTION:
 765             return wxIcon(question_xpm);
 766
 767         case wxICON_EXCLAMATION:
 768             return wxIcon(warning_xpm);
 769
 770         default:
 771             wxFAIL_MSG(wxT("requested non existent standard icon"));
 772             // still fall through
 773
 774         case wxICON_HAND:
 775             return wxIcon(error_xpm);
 776     }
 777 }