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     bool has_idle = (wxTheApp->m_idleTag != 0);
 147
 148     if (has_idle)
 149     {
 150         /* We need to temporarily remove idle callbacks or the loop will
 151            never finish. */
 152         gtk_idle_remove( wxTheApp->m_idleTag );
 153         wxTheApp->m_idleTag = 0;
 154     }
 155
 156     while (gtk_events_pending())
 157         gtk_main_iteration();
 158
 159     /* it's necessary to call ProcessIdle() to update the frames sizes which
 160        might have been changed (it also will update other things set from
 161        OnUpdateUI() which is a nice (and desired) side effect) */
 162     while (wxTheApp->ProcessIdle()) { }
 163
 164     if (has_idle)
 165     {
 166         /* re-add idle handler */
 167         wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 168     }
 169
 170     return TRUE;
 171 }
 172
 173 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 174 {
 175     if (!wxTheApp) return TRUE;
 176
 177 #if (GTK_MINOR_VERSION > 0)
 178     /* when getting called from GDK's idle handler we
 179        are no longer within GDK's grab on the GUI
 180        thread so we must lock it here ourselves */
 181     GDK_THREADS_ENTER ();
 182 #endif
 183
 184     /* sent idle event to all who request them */
 185     while (wxTheApp->ProcessIdle()) { }
 186
 187     /* we don't want any more idle events until the next event is
 188        sent to wxGTK */
 189     gtk_idle_remove( wxTheApp->m_idleTag );
 190     wxTheApp->m_idleTag = 0;
 191
 192     /* indicate that we are now in idle mode - even so deeply
 193        in idle mode that we don't get any idle events anymore.
 194        this is like wxMSW where an idle event is sent only
 195        once each time after the event queue has been completely
 196        emptied */
 197     g_isIdle = TRUE;
 198
 199 #if (GTK_MINOR_VERSION > 0)
 200     /* release lock again */
 201     GDK_THREADS_LEAVE ();
 202 #endif
 203
 204     return TRUE;
 205 }
 206
 207 void wxapp_install_idle_handler()
 208 {
 209     wxASSERT_MSG( wxTheApp->m_idleTag == 0, _T("attempt to install idle handler twice") );
 210
 211     /* this routine gets called by all event handlers
 212        indicating that the idle is over. */
 213
 214     wxTheApp->m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 215
 216     g_isIdle = FALSE;
 217 }
 218
 219 #if wxUSE_THREADS
 220
 221 /* forward declaration */
 222 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
 223
 224 void wxapp_install_thread_wakeup()
 225 {
 226     if (wxTheApp->m_wakeUpTimerTag) return;
 227
 228     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 100, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 229 }
 230
 231 void wxapp_uninstall_thread_wakeup()
 232 {
 233     if (!wxTheApp->m_wakeUpTimerTag) return;
 234
 235     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 236     wxTheApp->m_wakeUpTimerTag = 0;
 237 }
 238
 239 static gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 240 {
 241     wxapp_uninstall_thread_wakeup();
 242
 243 #if (GTK_MINOR_VERSION > 0)
 244     // when getting called from GDK's time-out handler
 245     // we are no longer within GDK's grab on the GUI
 246     // thread so we must lock it here ourselves
 247     GDK_THREADS_ENTER ();
 248 #endif
 249
 250     // unblock other threads wishing to do some GUI things
 251     wxMutexGuiLeave();
 252
 253     // wake up other threads
 254     wxUsleep( 1 );
 255
 256     // block other thread again
 257     wxMutexGuiEnter();
 258
 259 #if (GTK_MINOR_VERSION > 0)
 260     // release lock again
 261     GDK_THREADS_LEAVE ();
 262 #endif
 263
 264     wxapp_install_thread_wakeup();
 265
 266     return TRUE;
 267 }
 268 #endif
 269
 270 //-----------------------------------------------------------------------------
 271 // wxApp
 272 //-----------------------------------------------------------------------------
 273
 274 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 275
 276 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 277     EVT_IDLE(wxApp::OnIdle)
 278 END_EVENT_TABLE()
 279
 280 wxApp::wxApp()
 281 {
 282     wxTheApp = this;
 283
 284     m_topWindow = (wxWindow *) NULL;
 285     m_exitOnFrameDelete = TRUE;
 286
 287     m_idleTag = gtk_idle_add( wxapp_idle_callback, (gpointer) NULL );
 288
 289 #if wxUSE_THREADS
 290     m_wakeUpTimerTag = 0;
 291     wxapp_install_thread_wakeup();
 292 #endif
 293
 294     m_colorCube = (unsigned char*) NULL;
 295 }
 296
 297 wxApp::~wxApp()
 298 {
 299     if (m_idleTag) gtk_idle_remove( m_idleTag );
 300
 301 #if wxUSE_THREADS
 302     wxapp_uninstall_thread_wakeup();
 303 #endif
 304
 305     if (m_colorCube) free(m_colorCube);
 306 }
 307
 308 bool wxApp::OnInitGui()
 309 {
 310     GdkVisual *visual = gdk_visual_get_system();
 311
 312     /* on some machines, the default visual is just 256 colours, so
 313        we make sure we get the best. this can sometimes be wasteful,
 314        of course, but what do these guys pay $30.000 for? */
 315 /*
 316     if (gdk_visual_get_best() != gdk_visual_get_system())
 317     {
 318         GdkVisual* vis = gdk_visual_get_best();
 319         gtk_widget_set_default_visual( vis );
 320
 321         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 322         gtk_widget_set_default_colormap( colormap );
 323
 324         visual = vis;
 325     }
 326 */
 327
 328     /* Nothing to do for 15, 16, 24, 32 bit displays */
 329     if (visual->depth > 8) return TRUE;
 330
 331         /* this initiates the standard palette as defined by GdkImlib
 332            in the GNOME libraries. it ensures that all GNOME applications
 333            use the same 64 colormap entries on 8-bit displays so you
 334            can use several rather graphics-heavy applications at the
 335            same time.
 336            NOTE: this doesn't really seem to work this way... */
 337
 338         /*
 339         GdkColormap *cmap = gdk_colormap_new( gdk_visual_get_system(), TRUE );
 340
 341         for (int i = 0; i < 64; i++)
 342         {
 343             GdkColor col;
 344             col.red    = g_palette[i*3 + 0] << 8;
 345             col.green  = g_palette[i*3 + 1] << 8;
 346             col.blue   = g_palette[i*3 + 2] << 8;
 347             col.pixel  = 0;
 348
 349             gdk_color_alloc( cmap, &col );
 350         }
 351
 352         gtk_widget_set_default_colormap( cmap );
 353         */
 354
 355     /* initialize color cube for 8-bit color reduction dithering */
 356
 357     GdkColormap *cmap = gtk_widget_get_default_colormap();
 358
 359     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 360
 361     for (int r = 0; r < 32; r++)
 362     {
 363         for (int g = 0; g < 32; g++)
 364         {
 365             for (int b = 0; b < 32; b++)
 366             {
 367                 int rr = (r << 3) | (r >> 2);
 368                 int gg = (g << 3) | (g >> 2);
 369                 int bb = (b << 3) | (b >> 2);
 370
 371                 int index = -1;
 372
 373                 GdkColor *colors = cmap->colors;
 374                 if (colors)
 375                 {
 376                     int max = 3 * 65536;
 377
 378                     for (int i = 0; i < cmap->size; i++)
 379                     {
 380                         int rdiff = ((rr << 8) - colors[i].red);
 381                         int gdiff = ((gg << 8) - colors[i].green);
 382                         int bdiff = ((bb << 8) - colors[i].blue);
 383                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 384                         if (sum < max)
 385                         {
 386                             index = i; max = sum;
 387                         }
 388                     }
 389                 }
 390                 else
 391                 {
 392 #if (GTK_MINOR_VERSION > 0)
 393                     /* assume 8-bit true or static colors. this really
 394                        exists. */
 395                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 396                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 397                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 398                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 399 #else
 400                     wxFAIL_MSG( _T("Unsupported graphics hardware") );
 401 #endif
 402                 }
 403                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 404             }
 405         }
 406     }
 407
 408     return TRUE;
 409 }
 410
 411 bool wxApp::ProcessIdle()
 412 {
 413     wxIdleEvent event;
 414     event.SetEventObject( this );
 415     ProcessEvent( event );
 416
 417     return event.MoreRequested();
 418 }
 419
 420 void wxApp::OnIdle( wxIdleEvent &event )
 421 {
 422     static bool s_inOnIdle = FALSE;
 423
 424     /* Avoid recursion (via ProcessEvent default case) */
 425     if (s_inOnIdle)
 426         return;
 427
 428     s_inOnIdle = TRUE;
 429
 430 #if wxUSE_THREADS
 431     /* Resend in the main thread events which have been prepared in other
 432        threads */
 433     ProcessPendingEvents();
 434 #endif
 435
 436     /* 'Garbage' collection of windows deleted with Close(). */
 437     DeletePendingObjects();
 438
 439     /* flush the logged messages if any */
 440 #if wxUSE_LOG
 441     wxLog *log = wxLog::GetActiveTarget();
 442     if (log != NULL && log->HasPendingMessages())
 443         log->Flush();
 444 #endif // wxUSE_LOG
 445
 446     /* Send OnIdle events to all windows */
 447     bool needMore = SendIdleEvents();
 448
 449     if (needMore)
 450         event.RequestMore(TRUE);
 451
 452     s_inOnIdle = FALSE;
 453 }
 454
 455 bool wxApp::SendIdleEvents()
 456 {
 457     bool needMore = FALSE;
 458
 459     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 460     while (node)
 461     {
 462         wxWindow* win = node->GetData();
 463         if (SendIdleEvents(win))
 464             needMore = TRUE;
 465         node = node->GetNext();
 466     }
 467
 468     return needMore;
 469 }
 470
 471 bool wxApp::SendIdleEvents( wxWindow* win )
 472 {
 473     bool needMore = FALSE;
 474
 475     wxIdleEvent event;
 476     event.SetEventObject(win);
 477
 478     win->ProcessEvent(event);
 479
 480     win->OnInternalIdle();
 481
 482     if (event.MoreRequested())
 483         needMore = TRUE;
 484
 485     wxNode* node = win->GetChildren().First();
 486     while (node)
 487     {
 488         wxWindow* win = (wxWindow*) node->Data();
 489         if (SendIdleEvents(win))
 490             needMore = TRUE;
 491
 492         node = node->Next();
 493     }
 494     return needMore ;
 495 }
 496
 497 int wxApp::MainLoop()
 498 {
 499     gtk_main();
 500     return 0;
 501 }
 502
 503 void wxApp::ExitMainLoop()
 504 {
 505     gtk_main_quit();
 506 }
 507
 508 bool wxApp::Initialized()
 509 {
 510     return m_initialized;
 511 }
 512
 513 bool wxApp::Pending()
 514 {
 515     return (gtk_events_pending() > 0);
 516 }
 517
 518 void wxApp::Dispatch()
 519 {
 520     gtk_main_iteration();
 521 }
 522
 523 #if wxUSE_THREADS
 524 void wxApp::ProcessPendingEvents()
 525 {
 526     wxNode *node = wxPendingEvents->First();
 527     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 528
 529     while (node)
 530     {
 531         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 532
 533         handler->ProcessPendingEvents();
 534
 535         delete node;
 536
 537         node = wxPendingEvents->First();
 538     }
 539 }
 540 #endif // wxUSE_THREADS
 541
 542 void wxApp::DeletePendingObjects()
 543 {
 544     wxNode *node = wxPendingDelete.First();
 545     while (node)
 546     {
 547         wxObject *obj = (wxObject *)node->Data();
 548
 549         delete obj;
 550
 551         if (wxPendingDelete.Find(obj))
 552             delete node;
 553
 554         node = wxPendingDelete.First();
 555     }
 556 }
 557
 558 bool wxApp::Initialize()
 559 {
 560     wxBuffer = new wxChar[BUFSIZ + 512];
 561
 562     wxClassInfo::InitializeClasses();
 563
 564     wxSystemSettings::Init();
 565
 566     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 567     // create a module for that as it's part of the core.
 568 #if wxUSE_THREADS
 569     wxPendingEvents = new wxList();
 570     wxPendingEventsLocker = new wxCriticalSection();
 571 #endif
 572
 573 /*
 574     wxTheFontNameDirectory =  new wxFontNameDirectory;
 575     wxTheFontNameDirectory->Initialize();
 576 */
 577
 578     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 579     wxTheColourDatabase->Initialize();
 580
 581     wxInitializeStockLists();
 582     wxInitializeStockObjects();
 583
 584 #if wxUSE_WX_RESOURCES
 585     wxTheResourceCache = new wxResourceCache( wxKEY_STRING );
 586
 587     wxInitializeResourceSystem();
 588 #endif
 589
 590     wxImage::InitStandardHandlers();
 591
 592     wxModule::RegisterModules();
 593     if (!wxModule::InitializeModules()) return FALSE;
 594
 595     return TRUE;
 596 }
 597
 598 void wxApp::CleanUp()
 599 {
 600     wxModule::CleanUpModules();
 601
 602 #if wxUSE_WX_RESOURCES
 603     wxFlushResources();
 604
 605     if (wxTheResourceCache)
 606         delete wxTheResourceCache;
 607     wxTheResourceCache = (wxResourceCache*) NULL;
 608
 609     wxCleanUpResourceSystem();
 610 #endif
 611
 612     if (wxTheColourDatabase)
 613         delete wxTheColourDatabase;
 614     wxTheColourDatabase = (wxColourDatabase*) NULL;
 615
 616 /*
 617     if (wxTheFontNameDirectory) delete wxTheFontNameDirectory;
 618     wxTheFontNameDirectory = (wxFontNameDirectory*) NULL;
 619 */
 620
 621     wxDeleteStockObjects();
 622
 623     wxDeleteStockLists();
 624
 625     wxImage::CleanUpHandlers();
 626
 627     delete wxTheApp;
 628     wxTheApp = (wxApp*) NULL;
 629
 630     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 631     // create a module for that as it's part of the core.
 632 #if wxUSE_THREADS
 633     delete wxPendingEvents;
 634     delete wxPendingEventsLocker;
 635 #endif
 636
 637     wxSystemSettings::Done();
 638
 639     delete[] wxBuffer;
 640
 641     wxClassInfo::CleanUpClasses();
 642
 643     // check for memory leaks
 644 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 645     if (wxDebugContext::CountObjectsLeft() > 0)
 646     {
 647         wxLogDebug(_T("There were memory leaks.\n"));
 648         wxDebugContext::Dump();
 649         wxDebugContext::PrintStatistics();
 650     }
 651 #endif // Debug
 652
 653 #if wxUSE_LOG
 654     // do this as the very last thing because everything else can log messages
 655     wxLog::DontCreateOnDemand();
 656
 657     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 658     if (oldLog)
 659         delete oldLog;
 660 }
 661
 662 #endif // wxUSE_LOG
 663
 664 //-----------------------------------------------------------------------------
 665 // wxEntry
 666 //-----------------------------------------------------------------------------
 667
 668 int wxEntry( int argc, char *argv[] )
 669 {
 670     gtk_set_locale();
 671
 672 #if wxUSE_WCHAR_T
 673     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 674 #else
 675     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 676 #endif
 677
 678     gtk_init( &argc, &argv );
 679
 680     wxSetDetectableAutoRepeat( TRUE );
 681
 682     if (!wxApp::Initialize())
 683         return -1;
 684
 685     if (!wxTheApp)
 686     {
 687         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 688                      _T("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 689
 690         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 691
 692         wxObject *test_app = app_ini();
 693
 694         wxTheApp = (wxApp*) test_app;
 695     }
 696
 697     wxCHECK_MSG( wxTheApp, -1, _T("wxWindows error: no application object") );
 698
 699     wxTheApp->argc = argc;
 700 #if wxUSE_UNICODE
 701     wxTheApp->argv = new wxChar*[argc+1];
 702     int mb_argc = 0;
 703     while (mb_argc < argc) {
 704       wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 705       mb_argc++;
 706     }
 707     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 708 #else
 709     wxTheApp->argv = argv;
 710 #endif
 711
 712     wxString name(wxFileNameFromPath(argv[0]));
 713     wxStripExtension( name );
 714     wxTheApp->SetAppName( name );
 715
 716     int retValue = 0;
 717
 718     if ( !wxTheApp->OnInitGui() )
 719         retValue = -1;
 720
 721     // Here frames insert themselves automatically into wxTopLevelWindows by
 722     // getting created in OnInit().
 723     if ( retValue == 0 )
 724     {
 725         if ( !wxTheApp->OnInit() )
 726             retValue = -1;
 727     }
 728
 729     if ( retValue == 0 )
 730     {
 731         /* delete pending toplevel windows (typically a single
 732            dialog) so that, if there isn't any left, we don't
 733            call OnRun() */
 734         wxTheApp->DeletePendingObjects();
 735
 736         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 737
 738         if (wxTheApp->Initialized())
 739         {
 740             retValue = wxTheApp->OnRun();
 741
 742             wxWindow *topWindow = wxTheApp->GetTopWindow();
 743             if (topWindow)
 744             {
 745                 /* Forcibly delete the window. */
 746                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 747                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 748                 {
 749                     topWindow->Close( TRUE );
 750                     wxTheApp->DeletePendingObjects();
 751                 }
 752                 else
 753                 {
 754                     delete topWindow;
 755                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 756                 }
 757             }
 758             wxTheApp->OnExit();
 759         }
 760     }
 761
 762 #if wxUSE_LOG
 763     // flush the logged messages if any
 764     wxLog *log = wxLog::GetActiveTarget();
 765     if (log != NULL && log->HasPendingMessages())
 766         log->Flush();
 767
 768     // continuing to use user defined log target is unsafe from now on because
 769     // some resources may be already unavailable, so replace it by something
 770     // more safe
 771     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 772     if ( oldlog )
 773         delete oldlog;
 774 #endif // wxUSE_LOG
 775
 776     wxApp::CleanUp();
 777
 778     return retValue;
 779 }
 780
 781 #include "wx/gtk/info.xpm"
 782 #include "wx/gtk/error.xpm"
 783 #include "wx/gtk/question.xpm"
 784 #include "wx/gtk/warning.xpm"
 785
 786 wxIcon
 787 wxApp::GetStdIcon(int which) const
 788 {
 789     switch(which)
 790     {
 791         case wxICON_INFORMATION:
 792             return wxIcon(info_xpm);
 793
 794         case wxICON_QUESTION:
 795             return wxIcon(question_xpm);
 796
 797         case wxICON_EXCLAMATION:
 798             return wxIcon(warning_xpm);
 799
 800         default:
 801             wxFAIL_MSG(_T("requested non existent standard icon"));
 802             // still fall through
 803
 804         case wxICON_HAND:
 805             return wxIcon(error_xpm);
 806     }
 807 }