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 "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     // Release lock again
 158     gdk_threads_leave();
 159
 160     // Return FALSE to indicate that no more idle events are
 161     // to be sent (single shot instead of continuous stream)
 162     return FALSE;
 163 }
 164
 165 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 166 {
 167     if (!wxTheApp) return TRUE;
 168
 169     // when getting called from GDK's time-out handler
 170     // we are no longer within GDK's grab on the GUI
 171     // thread so we must lock it here ourselves
 172     gdk_threads_enter();
 173
 174     // Sent idle event to all who request them
 175     while (wxTheApp->ProcessIdle()) { }
 176
 177     /* Indicate that we are now in idle mode - even so deeply
 178        in idle mode that we don't get any idle events anymore.
 179        this is like wxMSW where an idle event is sent only
 180        once each time after the event queue has been completely
 181        emptied */
 182     g_isIdle = TRUE;
 183     wxTheApp->m_idleTag = 0;
 184
 185     // Release lock again
 186     gdk_threads_leave();
 187
 188     // Return FALSE to indicate that no more idle events are
 189     // to be sent (single shot instead of continuous stream)
 190     return FALSE;
 191 }
 192
 193 void wxapp_install_idle_handler()
 194 {
 195     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 196
 197     if (g_pendingTag == 0)
 198         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 199
 200     /* This routine gets called by all event handlers
 201        indicating that the idle is over. It may also
 202        get called from other thread for sending events
 203        to the main thread (and processing these in
 204        idle time). Very low priority. */
 205
 206     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 207
 208     g_isIdle = FALSE;
 209 }
 210
 211 #if wxUSE_THREADS
 212
 213 static int g_threadUninstallLevel = 0;
 214
 215 void wxapp_install_thread_wakeup()
 216 {
 217     g_threadUninstallLevel++;
 218
 219     if (g_threadUninstallLevel != 1) return;
 220
 221     if (wxTheApp->m_wakeUpTimerTag) return;
 222
 223     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 224 }
 225
 226 void wxapp_uninstall_thread_wakeup()
 227 {
 228     g_threadUninstallLevel--;
 229
 230     if (g_threadUninstallLevel != 0) return;
 231
 232     if (!wxTheApp->m_wakeUpTimerTag) return;
 233
 234     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 235     wxTheApp->m_wakeUpTimerTag = 0;
 236 }
 237
 238 gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 239 {
 240     // when getting called from GDK's time-out handler
 241     // we are no longer within GDK's grab on the GUI
 242     // thread so we must lock it here ourselves
 243     gdk_threads_enter();
 244
 245     wxapp_uninstall_thread_wakeup();
 246
 247     // unblock other threads wishing to do some GUI things
 248     wxMutexGuiLeave();
 249
 250     g_mainThreadLocked = TRUE;
 251
 252     // wake up other threads
 253     wxUsleep( 1 );
 254
 255     // block other thread again
 256     wxMutexGuiEnter();
 257
 258     g_mainThreadLocked = FALSE;
 259
 260     wxapp_install_thread_wakeup();
 261
 262     // release lock again
 263     gdk_threads_leave();
 264
 265     return TRUE;
 266 }
 267
 268 #endif // wxUSE_THREADS
 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_priority( 1000, 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     m_useBestVisual = FALSE;
 297 }
 298
 299 wxApp::~wxApp()
 300 {
 301     if (m_idleTag) gtk_idle_remove( m_idleTag );
 302
 303 #if wxUSE_THREADS
 304     wxapp_uninstall_thread_wakeup();
 305 #endif
 306
 307     if (m_colorCube) free(m_colorCube);
 308 }
 309
 310 bool wxApp::OnInitGui()
 311 {
 312     GdkVisual *visual = gdk_visual_get_system();
 313
 314     /* on some machines, the default visual is just 256 colours, so
 315        we make sure we get the best. this can sometimes be wasteful,
 316        of course, but what do these guys pay $30.000 for? */
 317
 318     if ((gdk_visual_get_best() != gdk_visual_get_system()) &&
 319         (m_useBestVisual))
 320     {
 321 #ifdef __WXGTK20__
 322         /* seems gtk_widget_set_default_visual no longer exists? */
 323         GdkVisual* vis = gtk_widget_get_default_visual();
 324 #else
 325         GdkVisual* vis = gdk_visual_get_best();
 326         gtk_widget_set_default_visual( vis );
 327 #endif
 328
 329         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 330         gtk_widget_set_default_colormap( colormap );
 331
 332         visual = vis;
 333     }
 334
 335     /* Nothing to do for 15, 16, 24, 32 bit displays */
 336     if (visual->depth > 8) return TRUE;
 337
 338     /* initialize color cube for 8-bit color reduction dithering */
 339
 340     GdkColormap *cmap = gtk_widget_get_default_colormap();
 341
 342     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 343
 344     for (int r = 0; r < 32; r++)
 345     {
 346         for (int g = 0; g < 32; g++)
 347         {
 348             for (int b = 0; b < 32; b++)
 349             {
 350                 int rr = (r << 3) | (r >> 2);
 351                 int gg = (g << 3) | (g >> 2);
 352                 int bb = (b << 3) | (b >> 2);
 353
 354                 int index = -1;
 355
 356                 GdkColor *colors = cmap->colors;
 357                 if (colors)
 358                 {
 359                     int max = 3 * 65536;
 360
 361                     for (int i = 0; i < cmap->size; i++)
 362                     {
 363                         int rdiff = ((rr << 8) - colors[i].red);
 364                         int gdiff = ((gg << 8) - colors[i].green);
 365                         int bdiff = ((bb << 8) - colors[i].blue);
 366                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 367                         if (sum < max)
 368                         {
 369                             index = i; max = sum;
 370                         }
 371                     }
 372                 }
 373                 else
 374                 {
 375 #if (GTK_MINOR_VERSION > 0)
 376                     /* assume 8-bit true or static colors. this really
 377                        exists. */
 378                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 379                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 380                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 381                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 382 #else
 383                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 384 #endif
 385                 }
 386                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 387             }
 388         }
 389     }
 390
 391     return TRUE;
 392 }
 393
 394 bool wxApp::ProcessIdle()
 395 {
 396     wxIdleEvent event;
 397     event.SetEventObject( this );
 398     ProcessEvent( event );
 399
 400     return event.MoreRequested();
 401 }
 402
 403 void wxApp::OnIdle( wxIdleEvent &event )
 404 {
 405     static bool s_inOnIdle = FALSE;
 406
 407     /* Avoid recursion (via ProcessEvent default case) */
 408     if (s_inOnIdle)
 409         return;
 410
 411     s_inOnIdle = TRUE;
 412
 413     /* Resend in the main thread events which have been prepared in other
 414        threads */
 415     ProcessPendingEvents();
 416
 417     /* 'Garbage' collection of windows deleted with Close(). */
 418     DeletePendingObjects();
 419
 420     /* Send OnIdle events to all windows */
 421     bool needMore = SendIdleEvents();
 422
 423     if (needMore)
 424         event.RequestMore(TRUE);
 425
 426     s_inOnIdle = FALSE;
 427
 428     /* flush the logged messages if any */
 429 #if wxUSE_LOG
 430     wxLog::FlushActive();
 431 #endif // wxUSE_LOG
 432 }
 433
 434 bool wxApp::SendIdleEvents()
 435 {
 436     bool needMore = FALSE;
 437
 438     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 439     while (node)
 440     {
 441         wxWindow* win = node->GetData();
 442         if (SendIdleEvents(win))
 443             needMore = TRUE;
 444         node = node->GetNext();
 445     }
 446
 447     return needMore;
 448 }
 449
 450 bool wxApp::SendIdleEvents( wxWindow* win )
 451 {
 452     bool needMore = FALSE;
 453
 454     wxIdleEvent event;
 455     event.SetEventObject(win);
 456
 457     win->GetEventHandler()->ProcessEvent(event);
 458
 459     win->OnInternalIdle();
 460
 461     if (event.MoreRequested())
 462         needMore = TRUE;
 463
 464     wxNode* node = win->GetChildren().First();
 465     while (node)
 466     {
 467         wxWindow* win = (wxWindow*) node->Data();
 468         if (SendIdleEvents(win))
 469             needMore = TRUE;
 470
 471         node = node->Next();
 472     }
 473     return needMore ;
 474 }
 475
 476 int wxApp::MainLoop()
 477 {
 478     gtk_main();
 479     return 0;
 480 }
 481
 482 void wxApp::ExitMainLoop()
 483 {
 484     if (gtk_main_level() > 0)
 485         gtk_main_quit();
 486 }
 487
 488 bool wxApp::Initialized()
 489 {
 490     return m_initialized;
 491 }
 492
 493 bool wxApp::Pending()
 494 {
 495     return (gtk_events_pending() > 0);
 496 }
 497
 498 void wxApp::Dispatch()
 499 {
 500     gtk_main_iteration();
 501 }
 502
 503 void wxApp::DeletePendingObjects()
 504 {
 505     wxNode *node = wxPendingDelete.First();
 506     while (node)
 507     {
 508         wxObject *obj = (wxObject *)node->Data();
 509
 510         delete obj;
 511
 512         if (wxPendingDelete.Find(obj))
 513             delete node;
 514
 515         node = wxPendingDelete.First();
 516     }
 517 }
 518
 519 bool wxApp::Initialize()
 520 {
 521     wxBuffer = new wxChar[BUFSIZ + 512];
 522
 523     wxClassInfo::InitializeClasses();
 524
 525     wxSystemSettings::Init();
 526
 527     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 528     // create a module for that as it's part of the core.
 529 #if wxUSE_THREADS
 530     wxPendingEvents = new wxList();
 531     wxPendingEventsLocker = new wxCriticalSection();
 532 #endif
 533
 534     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 535     wxTheColourDatabase->Initialize();
 536
 537     wxInitializeStockLists();
 538     wxInitializeStockObjects();
 539
 540 #if wxUSE_WX_RESOURCES
 541     wxInitializeResourceSystem();
 542 #endif
 543
 544     wxModule::RegisterModules();
 545     if (!wxModule::InitializeModules()) return FALSE;
 546
 547     return TRUE;
 548 }
 549
 550 void wxApp::CleanUp()
 551 {
 552     wxModule::CleanUpModules();
 553
 554 #if wxUSE_WX_RESOURCES
 555     wxCleanUpResourceSystem();
 556 #endif
 557
 558     if (wxTheColourDatabase)
 559         delete wxTheColourDatabase;
 560
 561     wxTheColourDatabase = (wxColourDatabase*) NULL;
 562
 563     wxDeleteStockObjects();
 564
 565     wxDeleteStockLists();
 566
 567     delete wxTheApp;
 568     wxTheApp = (wxApp*) NULL;
 569
 570     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 571     // create a module for that as it's part of the core.
 572 #if wxUSE_THREADS
 573     delete wxPendingEvents;
 574     delete wxPendingEventsLocker;
 575 #endif
 576
 577     wxSystemSettings::Done();
 578
 579     delete[] wxBuffer;
 580
 581     wxClassInfo::CleanUpClasses();
 582
 583     // check for memory leaks
 584 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 585     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 586     {
 587         wxLogDebug(wxT("There were memory leaks.\n"));
 588         wxDebugContext::Dump();
 589         wxDebugContext::PrintStatistics();
 590     }
 591 #endif // Debug
 592
 593 #if wxUSE_LOG
 594     // do this as the very last thing because everything else can log messages
 595     wxLog::DontCreateOnDemand();
 596
 597     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 598     if (oldLog)
 599         delete oldLog;
 600 #endif // wxUSE_LOG
 601 }
 602
 603 //-----------------------------------------------------------------------------
 604 // wxEntry
 605 //-----------------------------------------------------------------------------
 606
 607
 608 int wxEntryStart( int argc, char *argv[] )
 609 {
 610 #if wxUSE_THREADS
 611     /* GTK 1.2 up to version 1.2.3 has broken threads */
 612 #ifdef __VMS__
 613    if ((vms_gtk_major_version() == 1) &&
 614         (vms_gtk_minor_version() == 2) &&
 615         (vms_gtk_micro_version() < 4))
 616 #else
 617    if ((gtk_major_version == 1) &&
 618         (gtk_minor_version == 2) &&
 619         (gtk_micro_version < 4))
 620 #endif
 621     {
 622         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 623     }
 624     else
 625     {
 626         g_thread_init(NULL);
 627     }
 628 #endif
 629
 630     gtk_set_locale();
 631
 632 #if defined(__WXGTK20__)
 633     // gtk+ 2.0 supports Unicode through UTF-8 strings
 634     wxConvCurrent = &wxConvUTF8;
 635 #elif wxUSE_WCHAR_T
 636     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 637 #else
 638     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 639 #endif
 640
 641     gdk_threads_enter();
 642
 643     gtk_init( &argc, &argv );
 644
 645     wxSetDetectableAutoRepeat( TRUE );
 646
 647     if (!wxApp::Initialize())
 648     {
 649         gdk_threads_leave();
 650         return -1;
 651     }
 652
 653     return 0;
 654 }
 655
 656
 657 int wxEntryInitGui()
 658 {
 659     int retValue = 0;
 660
 661     if ( !wxTheApp->OnInitGui() )
 662         retValue = -1;
 663
 664     wxRootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 665     gtk_widget_realize( wxRootWindow );
 666
 667     return retValue;
 668 }
 669
 670
 671 void wxEntryCleanup()
 672 {
 673 #if wxUSE_LOG
 674     // flush the logged messages if any
 675     wxLog *log = wxLog::GetActiveTarget();
 676     if (log != NULL && log->HasPendingMessages())
 677         log->Flush();
 678
 679     // continuing to use user defined log target is unsafe from now on because
 680     // some resources may be already unavailable, so replace it by something
 681     // more safe
 682     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 683     if ( oldlog )
 684         delete oldlog;
 685 #endif // wxUSE_LOG
 686
 687     wxApp::CleanUp();
 688
 689     gdk_threads_leave();
 690 }
 691
 692
 693
 694 int wxEntry( int argc, char *argv[] )
 695 {
 696 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 697     // This seems to be necessary since there are 'rogue'
 698     // objects present at this point (perhaps global objects?)
 699     // Setting a checkpoint will ignore them as far as the
 700     // memory checking facility is concerned.
 701     // Of course you may argue that memory allocated in globals should be
 702     // checked, but this is a reasonable compromise.
 703     wxDebugContext::SetCheckpoint();
 704 #endif
 705     int err = wxEntryStart(argc, argv);
 706     if (err)
 707         return err;
 708
 709     if (!wxTheApp)
 710     {
 711         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 712                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 713
 714         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 715
 716         wxObject *test_app = app_ini();
 717
 718         wxTheApp = (wxApp*) test_app;
 719     }
 720
 721     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 722
 723     wxTheApp->argc = argc;
 724 #if wxUSE_UNICODE
 725     wxTheApp->argv = new wxChar*[argc+1];
 726     int mb_argc = 0;
 727     while (mb_argc < argc)
 728     {
 729         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 730         mb_argc++;
 731     }
 732     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 733 #else
 734     wxTheApp->argv = argv;
 735 #endif
 736
 737     wxString name(wxFileNameFromPath(argv[0]));
 738     wxStripExtension( name );
 739     wxTheApp->SetAppName( name );
 740
 741     int retValue;
 742     retValue = wxEntryInitGui();
 743
 744     // Here frames insert themselves automatically into wxTopLevelWindows by
 745     // getting created in OnInit().
 746     if ( retValue == 0 )
 747     {
 748         if ( !wxTheApp->OnInit() )
 749             retValue = -1;
 750     }
 751
 752     if ( retValue == 0 )
 753     {
 754         /* delete pending toplevel windows (typically a single
 755            dialog) so that, if there isn't any left, we don't
 756            call OnRun() */
 757         wxTheApp->DeletePendingObjects();
 758
 759         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 760
 761         if (wxTheApp->Initialized())
 762         {
 763             wxTheApp->OnRun();
 764
 765             wxWindow *topWindow = wxTheApp->GetTopWindow();
 766             if (topWindow)
 767             {
 768                 /* Forcibly delete the window. */
 769                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 770                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 771                 {
 772                     topWindow->Close( TRUE );
 773                     wxTheApp->DeletePendingObjects();
 774                 }
 775                 else
 776                 {
 777                     delete topWindow;
 778                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 779                 }
 780             }
 781
 782             retValue = wxTheApp->OnExit();
 783         }
 784     }
 785
 786     wxEntryCleanup();
 787
 788     return retValue;
 789 }
 790
 791 #include "wx/gtk/info.xpm"
 792 #include "wx/gtk/error.xpm"
 793 #include "wx/gtk/question.xpm"
 794 #include "wx/gtk/warning.xpm"
 795
 796 wxIcon
 797 wxApp::GetStdIcon(int which) const
 798 {
 799     switch(which)
 800     {
 801         case wxICON_INFORMATION:
 802             return wxIcon(info_xpm);
 803
 804         case wxICON_QUESTION:
 805             return wxIcon(question_xpm);
 806
 807         case wxICON_EXCLAMATION:
 808             return wxIcon(warning_xpm);
 809
 810         default:
 811             wxFAIL_MSG(wxT("requested non existent standard icon"));
 812             // still fall through
 813
 814         case wxICON_HAND:
 815             return wxIcon(error_xpm);
 816     }
 817 }