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 bool g_isIdle;
  51
  52 bool   g_mainThreadLocked = FALSE;
  53 gint   g_pendingTag = 0;
  54
  55 GtkWidget *wxRootWindow = (GtkWidget*) NULL;
  56
  57 //-----------------------------------------------------------------------------
  58 // local functions
  59 //-----------------------------------------------------------------------------
  60
  61 /* forward declaration */
  62 gint   wxapp_idle_callback( gpointer WXUNUSED(data) );
  63 gint   wxapp_pending_callback( gpointer WXUNUSED(data) );
  64 void   wxapp_install_idle_handler();
  65
  66 #if wxUSE_THREADS
  67 gint   wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
  68 #endif
  69
  70 //-----------------------------------------------------------------------------
  71 // wxExit
  72 //-----------------------------------------------------------------------------
  73
  74 void wxExit()
  75 {
  76     gtk_main_quit();
  77 }
  78
  79 //-----------------------------------------------------------------------------
  80 // wxYield
  81 //-----------------------------------------------------------------------------
  82
  83 bool wxYield()
  84 {
  85     bool has_idle = (wxTheApp->m_idleTag != 0);
  86
  87     if (has_idle)
  88     {
  89         /* We need to temporarily remove idle callbacks or the loop will
  90            never finish. */
  91         gtk_idle_remove( wxTheApp->m_idleTag );
  92         wxTheApp->m_idleTag = 0;
  93     }
  94
  95     while (gtk_events_pending())
  96         gtk_main_iteration();
  97
  98     if (has_idle)
  99     {
 100         /* re-add idle handler (very low priority) */
 101         wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 102     }
 103
 104     // disable log flushing from here because a call to wxYield() shouldn't
 105     // normally result in message boxes popping up &c
 106     wxLog::Suspend();
 107
 108     /* it's necessary to call ProcessIdle() to update the frames sizes which
 109        might have been changed (it also will update other things set from
 110        OnUpdateUI() which is a nice (and desired) side effect) */
 111     while (wxTheApp->ProcessIdle()) { }
 112
 113     // let the logs be flashed again
 114     wxLog::Resume();
 115
 116     return TRUE;
 117 }
 118
 119 //-----------------------------------------------------------------------------
 120 // wxWakeUpIdle
 121 //-----------------------------------------------------------------------------
 122
 123 void wxWakeUpIdle()
 124 {
 125 #if wxUSE_THREADS
 126     if (!wxThread::IsMain())
 127         wxMutexGuiEnter();
 128 #endif
 129
 130     if (g_isIdle)
 131         wxapp_install_idle_handler();
 132
 133 #if wxUSE_THREADS
 134     if (!wxThread::IsMain())
 135         wxMutexGuiLeave();
 136 #endif
 137 }
 138
 139 //-----------------------------------------------------------------------------
 140 // local functions
 141 //-----------------------------------------------------------------------------
 142
 143 gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 144 {
 145     if (!wxTheApp) return TRUE;
 146
 147     // when getting called from GDK's time-out handler
 148     // we are no longer within GDK's grab on the GUI
 149     // thread so we must lock it here ourselves
 150     gdk_threads_enter();
 151
 152     // Sent idle event to all who request them
 153     wxTheApp->ProcessPendingEvents();
 154
 155     g_pendingTag = 0;
 156
 157     /* flush the logged messages if any */
 158 #if wxUSE_LOG
 159     wxLog::FlushActive();
 160 #endif // wxUSE_LOG
 161
 162     // Release lock again
 163     gdk_threads_leave();
 164
 165     // Return FALSE to indicate that no more idle events are
 166     // to be sent (single shot instead of continuous stream)
 167     return FALSE;
 168 }
 169
 170 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 171 {
 172     if (!wxTheApp) return TRUE;
 173
 174     // when getting called from GDK's time-out handler
 175     // we are no longer within GDK's grab on the GUI
 176     // thread so we must lock it here ourselves
 177     gdk_threads_enter();
 178
 179     // Sent idle event to all who request them
 180     while (wxTheApp->ProcessIdle()) { }
 181
 182     /* Indicate that we are now in idle mode - even so deeply
 183        in idle mode that we don't get any idle events anymore.
 184        this is like wxMSW where an idle event is sent only
 185        once each time after the event queue has been completely
 186        emptied */
 187     g_isIdle = TRUE;
 188     wxTheApp->m_idleTag = 0;
 189
 190     // Release lock again
 191     gdk_threads_leave();
 192
 193     // Return FALSE to indicate that no more idle events are
 194     // to be sent (single shot instead of continuous stream)
 195     return FALSE;
 196 }
 197
 198 void wxapp_install_idle_handler()
 199 {
 200     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 201
 202     if (g_pendingTag == 0)
 203         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 204
 205     /* This routine gets called by all event handlers
 206        indicating that the idle is over. It may also
 207        get called from other thread for sending events
 208        to the main thread (and processing these in
 209        idle time). Very low priority. */
 210
 211     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 212
 213     g_isIdle = FALSE;
 214 }
 215
 216 #if wxUSE_THREADS
 217
 218 static int g_threadUninstallLevel = 0;
 219
 220 void wxapp_install_thread_wakeup()
 221 {
 222     g_threadUninstallLevel++;
 223
 224     if (g_threadUninstallLevel != 1) return;
 225
 226     if (wxTheApp->m_wakeUpTimerTag) return;
 227
 228     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 229 }
 230
 231 void wxapp_uninstall_thread_wakeup()
 232 {
 233     g_threadUninstallLevel--;
 234
 235     if (g_threadUninstallLevel != 0) return;
 236
 237     if (!wxTheApp->m_wakeUpTimerTag) return;
 238
 239     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 240     wxTheApp->m_wakeUpTimerTag = 0;
 241 }
 242
 243 gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 244 {
 245     // when getting called from GDK's time-out handler
 246     // we are no longer within GDK's grab on the GUI
 247     // thread so we must lock it here ourselves
 248     gdk_threads_enter();
 249
 250     wxapp_uninstall_thread_wakeup();
 251
 252     // unblock other threads wishing to do some GUI things
 253     wxMutexGuiLeave();
 254
 255     g_mainThreadLocked = TRUE;
 256
 257     // wake up other threads
 258     wxUsleep( 1 );
 259
 260     // block other thread again
 261     wxMutexGuiEnter();
 262
 263     g_mainThreadLocked = FALSE;
 264
 265     wxapp_install_thread_wakeup();
 266
 267     // release lock again
 268     gdk_threads_leave();
 269
 270     return TRUE;
 271 }
 272
 273 #endif // wxUSE_THREADS
 274
 275 //-----------------------------------------------------------------------------
 276 // wxApp
 277 //-----------------------------------------------------------------------------
 278
 279 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 280
 281 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 282     EVT_IDLE(wxApp::OnIdle)
 283 END_EVENT_TABLE()
 284
 285 wxApp::wxApp()
 286 {
 287     wxTheApp = this;
 288
 289     m_topWindow = (wxWindow *) NULL;
 290     m_exitOnFrameDelete = TRUE;
 291
 292     m_idleTag = 0;
 293     wxapp_install_idle_handler();
 294
 295 #if wxUSE_THREADS
 296     m_wakeUpTimerTag = 0;
 297     wxapp_install_thread_wakeup();
 298 #endif
 299
 300     m_colorCube = (unsigned char*) NULL;
 301
 302     m_useBestVisual = FALSE;
 303 }
 304
 305 wxApp::~wxApp()
 306 {
 307     if (m_idleTag) gtk_idle_remove( m_idleTag );
 308
 309 #if wxUSE_THREADS
 310     wxapp_uninstall_thread_wakeup();
 311 #endif
 312
 313     if (m_colorCube) free(m_colorCube);
 314 }
 315
 316 bool wxApp::OnInitGui()
 317 {
 318     GdkVisual *visual = gdk_visual_get_system();
 319
 320     /* on some machines, the default visual is just 256 colours, so
 321        we make sure we get the best. this can sometimes be wasteful,
 322        of course, but what do these guys pay $30.000 for? */
 323
 324     if ((gdk_visual_get_best() != gdk_visual_get_system()) &&
 325         (m_useBestVisual))
 326     {
 327 #ifdef __WXGTK20__
 328         /* seems gtk_widget_set_default_visual no longer exists? */
 329         GdkVisual* vis = gtk_widget_get_default_visual();
 330 #else
 331         GdkVisual* vis = gdk_visual_get_best();
 332         gtk_widget_set_default_visual( vis );
 333 #endif
 334
 335         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 336         gtk_widget_set_default_colormap( colormap );
 337
 338         visual = vis;
 339     }
 340
 341     /* Nothing to do for 15, 16, 24, 32 bit displays */
 342     if (visual->depth > 8) return TRUE;
 343
 344     /* initialize color cube for 8-bit color reduction dithering */
 345
 346     GdkColormap *cmap = gtk_widget_get_default_colormap();
 347
 348     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 349
 350     for (int r = 0; r < 32; r++)
 351     {
 352         for (int g = 0; g < 32; g++)
 353         {
 354             for (int b = 0; b < 32; b++)
 355             {
 356                 int rr = (r << 3) | (r >> 2);
 357                 int gg = (g << 3) | (g >> 2);
 358                 int bb = (b << 3) | (b >> 2);
 359
 360                 int index = -1;
 361
 362                 GdkColor *colors = cmap->colors;
 363                 if (colors)
 364                 {
 365                     int max = 3 * 65536;
 366
 367                     for (int i = 0; i < cmap->size; i++)
 368                     {
 369                         int rdiff = ((rr << 8) - colors[i].red);
 370                         int gdiff = ((gg << 8) - colors[i].green);
 371                         int bdiff = ((bb << 8) - colors[i].blue);
 372                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 373                         if (sum < max)
 374                         {
 375                             index = i; max = sum;
 376                         }
 377                     }
 378                 }
 379                 else
 380                 {
 381 #if (GTK_MINOR_VERSION > 0)
 382                     /* assume 8-bit true or static colors. this really
 383                        exists. */
 384                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 385                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 386                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 387                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 388 #else
 389                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 390 #endif
 391                 }
 392                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 393             }
 394         }
 395     }
 396
 397     return TRUE;
 398 }
 399
 400 bool wxApp::ProcessIdle()
 401 {
 402     wxIdleEvent event;
 403     event.SetEventObject( this );
 404     ProcessEvent( event );
 405
 406     return event.MoreRequested();
 407 }
 408
 409 void wxApp::OnIdle( wxIdleEvent &event )
 410 {
 411     static bool s_inOnIdle = FALSE;
 412
 413     /* Avoid recursion (via ProcessEvent default case) */
 414     if (s_inOnIdle)
 415         return;
 416
 417     s_inOnIdle = TRUE;
 418
 419     /* Resend in the main thread events which have been prepared in other
 420        threads */
 421     ProcessPendingEvents();
 422
 423     /* 'Garbage' collection of windows deleted with Close(). */
 424     DeletePendingObjects();
 425
 426     /* Send OnIdle events to all windows */
 427     bool needMore = SendIdleEvents();
 428
 429     if (needMore)
 430         event.RequestMore(TRUE);
 431
 432     s_inOnIdle = FALSE;
 433 }
 434
 435 bool wxApp::SendIdleEvents()
 436 {
 437     bool needMore = FALSE;
 438
 439     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 440     while (node)
 441     {
 442         wxWindow* win = node->GetData();
 443         if (SendIdleEvents(win))
 444             needMore = TRUE;
 445         node = node->GetNext();
 446     }
 447
 448     return needMore;
 449 }
 450
 451 bool wxApp::SendIdleEvents( wxWindow* win )
 452 {
 453     bool needMore = FALSE;
 454
 455     wxIdleEvent event;
 456     event.SetEventObject(win);
 457
 458     win->GetEventHandler()->ProcessEvent(event);
 459
 460     win->OnInternalIdle();
 461
 462     if (event.MoreRequested())
 463         needMore = TRUE;
 464
 465     wxNode* node = win->GetChildren().First();
 466     while (node)
 467     {
 468         wxWindow* win = (wxWindow*) node->Data();
 469         if (SendIdleEvents(win))
 470             needMore = TRUE;
 471
 472         node = node->Next();
 473     }
 474     return needMore ;
 475 }
 476
 477 int wxApp::MainLoop()
 478 {
 479     gtk_main();
 480     return 0;
 481 }
 482
 483 void wxApp::ExitMainLoop()
 484 {
 485     if (gtk_main_level() > 0)
 486         gtk_main_quit();
 487 }
 488
 489 bool wxApp::Initialized()
 490 {
 491     return m_initialized;
 492 }
 493
 494 bool wxApp::Pending()
 495 {
 496     return (gtk_events_pending() > 0);
 497 }
 498
 499 void wxApp::Dispatch()
 500 {
 501     gtk_main_iteration();
 502 }
 503
 504 void wxApp::DeletePendingObjects()
 505 {
 506     wxNode *node = wxPendingDelete.First();
 507     while (node)
 508     {
 509         wxObject *obj = (wxObject *)node->Data();
 510
 511         delete obj;
 512
 513         if (wxPendingDelete.Find(obj))
 514             delete node;
 515
 516         node = wxPendingDelete.First();
 517     }
 518 }
 519
 520 bool wxApp::Initialize()
 521 {
 522     wxBuffer = new wxChar[BUFSIZ + 512];
 523
 524     wxClassInfo::InitializeClasses();
 525
 526     wxSystemSettings::Init();
 527
 528     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 529     // create a module for that as it's part of the core.
 530 #if wxUSE_THREADS
 531     wxPendingEvents = new wxList();
 532     wxPendingEventsLocker = new wxCriticalSection();
 533 #endif
 534
 535     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 536     wxTheColourDatabase->Initialize();
 537
 538     wxInitializeStockLists();
 539     wxInitializeStockObjects();
 540
 541 #if wxUSE_WX_RESOURCES
 542     wxInitializeResourceSystem();
 543 #endif
 544
 545     wxModule::RegisterModules();
 546     if (!wxModule::InitializeModules()) return FALSE;
 547
 548     return TRUE;
 549 }
 550
 551 void wxApp::CleanUp()
 552 {
 553     wxModule::CleanUpModules();
 554
 555 #if wxUSE_WX_RESOURCES
 556     wxCleanUpResourceSystem();
 557 #endif
 558
 559     if (wxTheColourDatabase)
 560         delete wxTheColourDatabase;
 561
 562     wxTheColourDatabase = (wxColourDatabase*) NULL;
 563
 564     wxDeleteStockObjects();
 565
 566     wxDeleteStockLists();
 567
 568     delete wxTheApp;
 569     wxTheApp = (wxApp*) NULL;
 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     delete wxPendingEvents;
 575     delete wxPendingEventsLocker;
 576 #endif
 577
 578     wxSystemSettings::Done();
 579
 580     delete[] wxBuffer;
 581
 582     wxClassInfo::CleanUpClasses();
 583
 584     // check for memory leaks
 585 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 586     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 587     {
 588         wxLogDebug(wxT("There were memory leaks.\n"));
 589         wxDebugContext::Dump();
 590         wxDebugContext::PrintStatistics();
 591     }
 592 #endif // Debug
 593
 594 #if wxUSE_LOG
 595     // do this as the very last thing because everything else can log messages
 596     wxLog::DontCreateOnDemand();
 597
 598     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 599     if (oldLog)
 600         delete oldLog;
 601 #endif // wxUSE_LOG
 602 }
 603
 604 //-----------------------------------------------------------------------------
 605 // wxEntry
 606 //-----------------------------------------------------------------------------
 607
 608
 609 int wxEntryStart( int argc, char *argv[] )
 610 {
 611 #if wxUSE_THREADS
 612     /* GTK 1.2 up to version 1.2.3 has broken threads */
 613    if ((gtk_major_version == 1) &&
 614         (gtk_minor_version == 2) &&
 615         (gtk_micro_version < 4))
 616     {
 617         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 618     }
 619     else
 620     {
 621         g_thread_init(NULL);
 622     }
 623 #endif
 624
 625     gtk_set_locale();
 626
 627 #if defined(__WXGTK20__)
 628     // gtk+ 2.0 supports Unicode through UTF-8 strings
 629     wxConvCurrent = &wxConvUTF8;
 630 #elif wxUSE_WCHAR_T
 631     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 632 #else
 633     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 634 #endif
 635
 636     gdk_threads_enter();
 637
 638     gtk_init( &argc, &argv );
 639
 640     wxSetDetectableAutoRepeat( TRUE );
 641
 642     if (!wxApp::Initialize())
 643     {
 644         gdk_threads_leave();
 645         return -1;
 646     }
 647
 648     return 0;
 649 }
 650
 651
 652 int wxEntryInitGui()
 653 {
 654     int retValue = 0;
 655
 656     if ( !wxTheApp->OnInitGui() )
 657         retValue = -1;
 658
 659     wxRootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 660     gtk_widget_realize( wxRootWindow );
 661
 662     return retValue;
 663 }
 664
 665
 666 void wxEntryCleanup()
 667 {
 668 #if wxUSE_LOG
 669     // flush the logged messages if any
 670     wxLog *log = wxLog::GetActiveTarget();
 671     if (log != NULL && log->HasPendingMessages())
 672         log->Flush();
 673
 674     // continuing to use user defined log target is unsafe from now on because
 675     // some resources may be already unavailable, so replace it by something
 676     // more safe
 677     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 678     if ( oldlog )
 679         delete oldlog;
 680 #endif // wxUSE_LOG
 681
 682     wxApp::CleanUp();
 683
 684     gdk_threads_leave();
 685 }
 686
 687
 688
 689 int wxEntry( int argc, char *argv[] )
 690 {
 691 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 692     // This seems to be necessary since there are 'rogue'
 693     // objects present at this point (perhaps global objects?)
 694     // Setting a checkpoint will ignore them as far as the
 695     // memory checking facility is concerned.
 696     // Of course you may argue that memory allocated in globals should be
 697     // checked, but this is a reasonable compromise.
 698     wxDebugContext::SetCheckpoint();
 699 #endif
 700     int err = wxEntryStart(argc, argv);
 701     if (err)
 702         return err;
 703
 704     if (!wxTheApp)
 705     {
 706         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 707                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 708
 709         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 710
 711         wxObject *test_app = app_ini();
 712
 713         wxTheApp = (wxApp*) test_app;
 714     }
 715
 716     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 717
 718     wxTheApp->argc = argc;
 719 #if wxUSE_UNICODE
 720     wxTheApp->argv = new wxChar*[argc+1];
 721     int mb_argc = 0;
 722     while (mb_argc < argc)
 723     {
 724         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 725         mb_argc++;
 726     }
 727     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 728 #else
 729     wxTheApp->argv = argv;
 730 #endif
 731
 732     wxString name(wxFileNameFromPath(argv[0]));
 733     wxStripExtension( name );
 734     wxTheApp->SetAppName( name );
 735
 736     int retValue;
 737     retValue = wxEntryInitGui();
 738
 739     // Here frames insert themselves automatically into wxTopLevelWindows by
 740     // getting created in OnInit().
 741     if ( retValue == 0 )
 742     {
 743         if ( !wxTheApp->OnInit() )
 744             retValue = -1;
 745     }
 746
 747     if ( retValue == 0 )
 748     {
 749         /* delete pending toplevel windows (typically a single
 750            dialog) so that, if there isn't any left, we don't
 751            call OnRun() */
 752         wxTheApp->DeletePendingObjects();
 753
 754         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 755
 756         if (wxTheApp->Initialized())
 757         {
 758             wxTheApp->OnRun();
 759
 760             wxWindow *topWindow = wxTheApp->GetTopWindow();
 761             if (topWindow)
 762             {
 763                 /* Forcibly delete the window. */
 764                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 765                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 766                 {
 767                     topWindow->Close( TRUE );
 768                     wxTheApp->DeletePendingObjects();
 769                 }
 770                 else
 771                 {
 772                     delete topWindow;
 773                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 774                 }
 775             }
 776
 777             retValue = wxTheApp->OnExit();
 778         }
 779     }
 780
 781     wxEntryCleanup();
 782
 783     return retValue;
 784 }
 785
 786 #include "wx/gtk/info.xpm"
 787 #include "wx/gtk/error.xpm"
 788 #include "wx/gtk/question.xpm"
 789 #include "wx/gtk/warning.xpm"
 790
 791 wxIcon
 792 wxApp::GetStdIcon(int which) const
 793 {
 794     switch(which)
 795     {
 796         case wxICON_INFORMATION:
 797             return wxIcon(info_xpm);
 798
 799         case wxICON_QUESTION:
 800             return wxIcon(question_xpm);
 801
 802         case wxICON_EXCLAMATION:
 803             return wxIcon(warning_xpm);
 804
 805         default:
 806             wxFAIL_MSG(wxT("requested non existent standard icon"));
 807             // still fall through
 808
 809         case wxICON_HAND:
 810             return wxIcon(error_xpm);
 811     }
 812 }