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 static bool gs_inYield = FALSE;
  84
  85 bool wxYield()
  86 {
  87 #if wxUSE_THREADS
  88     if ( !wxThread::IsMain() )
  89     {
  90         // can't call gtk_main_iteration() from other threads like this
  91         return TRUE;
  92     }
  93 #endif // wxUSE_THREADS
  94
  95 #ifdef __WXDEBUG__
  96     if (gs_inYield)
  97         wxFAIL_MSG( wxT("wxYield called recursively" ) );
  98 #endif
  99
 100     gs_inYield = TRUE;
 101
 102     if (!g_isIdle)
 103     {
 104         // We need to remove idle callbacks or the loop will
 105         // never finish.
 106         gtk_idle_remove( wxTheApp->m_idleTag );
 107         wxTheApp->m_idleTag = 0;
 108         g_isIdle = TRUE;
 109     }
 110
 111     while (gtk_events_pending())
 112         gtk_main_iteration();
 113
 114     // disable log flushing from here because a call to wxYield() shouldn't
 115     // normally result in message boxes popping up &c
 116     wxLog::Suspend();
 117
 118     /* it's necessary to call ProcessIdle() to update the frames sizes which
 119        might have been changed (it also will update other things set from
 120        OnUpdateUI() which is a nice (and desired) side effect) */
 121     while (wxTheApp->ProcessIdle()) { }
 122
 123     // let the logs be flashed again
 124     wxLog::Resume();
 125
 126     gs_inYield = FALSE;
 127
 128     return TRUE;
 129 }
 130
 131 //-----------------------------------------------------------------------------
 132 // wxYieldIfNeeded
 133 // Like wxYield, but fails silently if the yield is recursive.
 134 //-----------------------------------------------------------------------------
 135
 136 bool wxYieldIfNeeded()
 137 {
 138     if (gs_inYield)
 139         return FALSE;
 140
 141     return wxYield();
 142 }
 143
 144 //-----------------------------------------------------------------------------
 145 // wxWakeUpIdle
 146 //-----------------------------------------------------------------------------
 147
 148 void wxWakeUpIdle()
 149 {
 150 #if wxUSE_THREADS
 151     if (!wxThread::IsMain())
 152         wxMutexGuiEnter();
 153 #endif
 154
 155     if (g_isIdle)
 156         wxapp_install_idle_handler();
 157
 158 #if wxUSE_THREADS
 159     if (!wxThread::IsMain())
 160         wxMutexGuiLeave();
 161 #endif
 162 }
 163
 164 //-----------------------------------------------------------------------------
 165 // local functions
 166 //-----------------------------------------------------------------------------
 167
 168 gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 169 {
 170     if (!wxTheApp) return TRUE;
 171
 172     // when getting called from GDK's time-out handler
 173     // we are no longer within GDK's grab on the GUI
 174     // thread so we must lock it here ourselves
 175     gdk_threads_enter();
 176
 177     // Sent idle event to all who request them
 178     wxTheApp->ProcessPendingEvents();
 179
 180     g_pendingTag = 0;
 181
 182     /* flush the logged messages if any */
 183 #if wxUSE_LOG
 184     wxLog::FlushActive();
 185 #endif // wxUSE_LOG
 186
 187     // Release lock again
 188     gdk_threads_leave();
 189
 190     // Return FALSE to indicate that no more idle events are
 191     // to be sent (single shot instead of continuous stream)
 192     return FALSE;
 193 }
 194
 195 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 196 {
 197     if (!wxTheApp) return TRUE;
 198
 199     // when getting called from GDK's time-out handler
 200     // we are no longer within GDK's grab on the GUI
 201     // thread so we must lock it here ourselves
 202     gdk_threads_enter();
 203
 204     /* Indicate that we are now in idle mode - even so deeply
 205        in idle mode that we don't get any idle events anymore.
 206        this is like wxMSW where an idle event is sent only
 207        once each time after the event queue has been completely
 208        emptied */
 209     g_isIdle = TRUE;
 210     wxTheApp->m_idleTag = 0;
 211
 212     // Sent idle event to all who request them
 213     while (wxTheApp->ProcessIdle()) { }
 214
 215     // Release lock again
 216     gdk_threads_leave();
 217
 218     // Return FALSE to indicate that no more idle events are
 219     // to be sent (single shot instead of continuous stream)
 220     return FALSE;
 221 }
 222
 223 void wxapp_install_idle_handler()
 224 {
 225     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 226
 227     g_isIdle = FALSE;
 228
 229     if (g_pendingTag == 0)
 230         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 231
 232     /* This routine gets called by all event handlers
 233        indicating that the idle is over. It may also
 234        get called from other thread for sending events
 235        to the main thread (and processing these in
 236        idle time). Very low priority. */
 237
 238     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 239 }
 240
 241 #if wxUSE_THREADS
 242
 243 static int g_threadUninstallLevel = 0;
 244
 245 void wxapp_install_thread_wakeup()
 246 {
 247     g_threadUninstallLevel++;
 248
 249     if (g_threadUninstallLevel != 1) return;
 250
 251     if (wxTheApp->m_wakeUpTimerTag) return;
 252
 253     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 254 }
 255
 256 void wxapp_uninstall_thread_wakeup()
 257 {
 258     g_threadUninstallLevel--;
 259
 260     if (g_threadUninstallLevel != 0) return;
 261
 262     if (!wxTheApp->m_wakeUpTimerTag) return;
 263
 264     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 265     wxTheApp->m_wakeUpTimerTag = 0;
 266 }
 267
 268 gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 269 {
 270     // when getting called from GDK's time-out handler
 271     // we are no longer within GDK's grab on the GUI
 272     // thread so we must lock it here ourselves
 273     gdk_threads_enter();
 274
 275     wxapp_uninstall_thread_wakeup();
 276
 277     // unblock other threads wishing to do some GUI things
 278     wxMutexGuiLeave();
 279
 280     g_mainThreadLocked = TRUE;
 281
 282     // wake up other threads
 283     wxUsleep( 1 );
 284
 285     // block other thread again
 286     wxMutexGuiEnter();
 287
 288     g_mainThreadLocked = FALSE;
 289
 290     wxapp_install_thread_wakeup();
 291
 292     // release lock again
 293     gdk_threads_leave();
 294
 295     return TRUE;
 296 }
 297
 298 #endif // wxUSE_THREADS
 299
 300 //-----------------------------------------------------------------------------
 301 // wxApp
 302 //-----------------------------------------------------------------------------
 303
 304 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 305
 306 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 307     EVT_IDLE(wxApp::OnIdle)
 308 END_EVENT_TABLE()
 309
 310 wxApp::wxApp()
 311 {
 312     wxTheApp = this;
 313
 314     m_topWindow = (wxWindow *) NULL;
 315     m_exitOnFrameDelete = TRUE;
 316
 317     m_idleTag = 0;
 318     wxapp_install_idle_handler();
 319
 320 #if wxUSE_THREADS
 321     m_wakeUpTimerTag = 0;
 322     wxapp_install_thread_wakeup();
 323 #endif
 324
 325     m_colorCube = (unsigned char*) NULL;
 326
 327     m_useBestVisual = FALSE;
 328 }
 329
 330 wxApp::~wxApp()
 331 {
 332     if (m_idleTag) gtk_idle_remove( m_idleTag );
 333
 334 #if wxUSE_THREADS
 335     wxapp_uninstall_thread_wakeup();
 336 #endif
 337
 338     if (m_colorCube) free(m_colorCube);
 339 }
 340
 341 bool wxApp::OnInitGui()
 342 {
 343     GdkVisual *visual = gdk_visual_get_system();
 344
 345     /* on some machines, the default visual is just 256 colours, so
 346        we make sure we get the best. this can sometimes be wasteful,
 347        of course, but what do these guys pay $30.000 for? */
 348
 349     if ((gdk_visual_get_best() != gdk_visual_get_system()) &&
 350         (m_useBestVisual))
 351     {
 352 #ifdef __WXGTK20__
 353         /* seems gtk_widget_set_default_visual no longer exists? */
 354         GdkVisual* vis = gtk_widget_get_default_visual();
 355 #else
 356         GdkVisual* vis = gdk_visual_get_best();
 357         gtk_widget_set_default_visual( vis );
 358 #endif
 359
 360         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 361         gtk_widget_set_default_colormap( colormap );
 362
 363         visual = vis;
 364     }
 365
 366     /* Nothing to do for 15, 16, 24, 32 bit displays */
 367     if (visual->depth > 8) return TRUE;
 368
 369     /* initialize color cube for 8-bit color reduction dithering */
 370
 371     GdkColormap *cmap = gtk_widget_get_default_colormap();
 372
 373     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 374
 375     for (int r = 0; r < 32; r++)
 376     {
 377         for (int g = 0; g < 32; g++)
 378         {
 379             for (int b = 0; b < 32; b++)
 380             {
 381                 int rr = (r << 3) | (r >> 2);
 382                 int gg = (g << 3) | (g >> 2);
 383                 int bb = (b << 3) | (b >> 2);
 384
 385                 int index = -1;
 386
 387                 GdkColor *colors = cmap->colors;
 388                 if (colors)
 389                 {
 390                     int max = 3 * 65536;
 391
 392                     for (int i = 0; i < cmap->size; i++)
 393                     {
 394                         int rdiff = ((rr << 8) - colors[i].red);
 395                         int gdiff = ((gg << 8) - colors[i].green);
 396                         int bdiff = ((bb << 8) - colors[i].blue);
 397                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 398                         if (sum < max)
 399                         {
 400                             index = i; max = sum;
 401                         }
 402                     }
 403                 }
 404                 else
 405                 {
 406 #if (GTK_MINOR_VERSION > 0)
 407                     /* assume 8-bit true or static colors. this really
 408                        exists. */
 409                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 410                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 411                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 412                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 413 #else
 414                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 415 #endif
 416                 }
 417                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 418             }
 419         }
 420     }
 421
 422     return TRUE;
 423 }
 424
 425 bool wxApp::ProcessIdle()
 426 {
 427     wxIdleEvent event;
 428     event.SetEventObject( this );
 429     ProcessEvent( event );
 430
 431     return event.MoreRequested();
 432 }
 433
 434 void wxApp::OnIdle( wxIdleEvent &event )
 435 {
 436     static bool s_inOnIdle = FALSE;
 437
 438     /* Avoid recursion (via ProcessEvent default case) */
 439     if (s_inOnIdle)
 440         return;
 441
 442     s_inOnIdle = TRUE;
 443
 444     /* Resend in the main thread events which have been prepared in other
 445        threads */
 446     ProcessPendingEvents();
 447
 448     /* 'Garbage' collection of windows deleted with Close(). */
 449     DeletePendingObjects();
 450
 451     /* Send OnIdle events to all windows */
 452     bool needMore = SendIdleEvents();
 453
 454     if (needMore)
 455         event.RequestMore(TRUE);
 456
 457     s_inOnIdle = FALSE;
 458 }
 459
 460 bool wxApp::SendIdleEvents()
 461 {
 462     bool needMore = FALSE;
 463
 464     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 465     while (node)
 466     {
 467         wxWindow* win = node->GetData();
 468         if (SendIdleEvents(win))
 469             needMore = TRUE;
 470         node = node->GetNext();
 471     }
 472
 473     return needMore;
 474 }
 475
 476 bool wxApp::SendIdleEvents( wxWindow* win )
 477 {
 478     bool needMore = FALSE;
 479
 480     wxIdleEvent event;
 481     event.SetEventObject(win);
 482
 483     win->GetEventHandler()->ProcessEvent(event);
 484
 485     win->OnInternalIdle();
 486
 487     if (event.MoreRequested())
 488         needMore = TRUE;
 489
 490     wxNode* node = win->GetChildren().First();
 491     while (node)
 492     {
 493         wxWindow* win = (wxWindow*) node->Data();
 494         if (SendIdleEvents(win))
 495             needMore = TRUE;
 496
 497         node = node->Next();
 498     }
 499     return needMore ;
 500 }
 501
 502 int wxApp::MainLoop()
 503 {
 504     gtk_main();
 505     return 0;
 506 }
 507
 508 void wxApp::ExitMainLoop()
 509 {
 510     if (gtk_main_level() > 0)
 511         gtk_main_quit();
 512 }
 513
 514 bool wxApp::Initialized()
 515 {
 516     return m_initialized;
 517 }
 518
 519 bool wxApp::Pending()
 520 {
 521     return (gtk_events_pending() > 0);
 522 }
 523
 524 void wxApp::Dispatch()
 525 {
 526     gtk_main_iteration();
 527 }
 528
 529 void wxApp::DeletePendingObjects()
 530 {
 531     wxNode *node = wxPendingDelete.First();
 532     while (node)
 533     {
 534         wxObject *obj = (wxObject *)node->Data();
 535
 536         delete obj;
 537
 538         if (wxPendingDelete.Find(obj))
 539             delete node;
 540
 541         node = wxPendingDelete.First();
 542     }
 543 }
 544
 545 bool wxApp::Initialize()
 546 {
 547     wxBuffer = new wxChar[BUFSIZ + 512];
 548
 549     wxClassInfo::InitializeClasses();
 550
 551     wxSystemSettings::Init();
 552
 553     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 554     // create a module for that as it's part of the core.
 555 #if wxUSE_THREADS
 556     wxPendingEvents = new wxList();
 557     wxPendingEventsLocker = new wxCriticalSection();
 558 #endif
 559
 560     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 561     wxTheColourDatabase->Initialize();
 562
 563     wxInitializeStockLists();
 564     wxInitializeStockObjects();
 565
 566 #if wxUSE_WX_RESOURCES
 567     wxInitializeResourceSystem();
 568 #endif
 569
 570     wxModule::RegisterModules();
 571     if (!wxModule::InitializeModules()) return FALSE;
 572
 573     return TRUE;
 574 }
 575
 576 void wxApp::CleanUp()
 577 {
 578     wxModule::CleanUpModules();
 579
 580 #if wxUSE_WX_RESOURCES
 581     wxCleanUpResourceSystem();
 582 #endif
 583
 584     if (wxTheColourDatabase)
 585         delete wxTheColourDatabase;
 586
 587     wxTheColourDatabase = (wxColourDatabase*) NULL;
 588
 589     wxDeleteStockObjects();
 590
 591     wxDeleteStockLists();
 592
 593     delete wxTheApp;
 594     wxTheApp = (wxApp*) NULL;
 595
 596     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 597     // create a module for that as it's part of the core.
 598 #if wxUSE_THREADS
 599     delete wxPendingEvents;
 600     delete wxPendingEventsLocker;
 601 #endif
 602
 603     wxSystemSettings::Done();
 604
 605     delete[] wxBuffer;
 606
 607     wxClassInfo::CleanUpClasses();
 608
 609     // check for memory leaks
 610 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 611     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 612     {
 613         wxLogDebug(wxT("There were memory leaks.\n"));
 614         wxDebugContext::Dump();
 615         wxDebugContext::PrintStatistics();
 616     }
 617 #endif // Debug
 618
 619 #if wxUSE_LOG
 620     // do this as the very last thing because everything else can log messages
 621     wxLog::DontCreateOnDemand();
 622
 623     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 624     if (oldLog)
 625         delete oldLog;
 626 #endif // wxUSE_LOG
 627 }
 628
 629 //-----------------------------------------------------------------------------
 630 // wxEntry
 631 //-----------------------------------------------------------------------------
 632
 633
 634 int wxEntryStart( int argc, char *argv[] )
 635 {
 636 #if wxUSE_THREADS
 637     /* GTK 1.2 up to version 1.2.3 has broken threads */
 638    if ((gtk_major_version == 1) &&
 639         (gtk_minor_version == 2) &&
 640         (gtk_micro_version < 4))
 641     {
 642         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 643     }
 644     else
 645     {
 646         g_thread_init(NULL);
 647     }
 648 #endif
 649
 650     gtk_set_locale();
 651
 652     // We should have the wxUSE_WCHAR_T test on the _outside_
 653 #if wxUSE_WCHAR_T
 654 #if defined(__WXGTK20__)
 655     // gtk+ 2.0 supports Unicode through UTF-8 strings
 656     wxConvCurrent = &wxConvUTF8;
 657 #else
 658     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 659 #endif
 660 #else
 661     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 662 #endif
 663
 664     gdk_threads_enter();
 665
 666     gtk_init( &argc, &argv );
 667
 668     wxSetDetectableAutoRepeat( TRUE );
 669
 670     if (!wxApp::Initialize())
 671     {
 672         gdk_threads_leave();
 673         return -1;
 674     }
 675
 676     return 0;
 677 }
 678
 679 int wxEntryInitGui()
 680 {
 681     int retValue = 0;
 682
 683     if ( !wxTheApp->OnInitGui() )
 684         retValue = -1;
 685
 686     wxRootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 687     gtk_widget_realize( wxRootWindow );
 688
 689     return retValue;
 690 }
 691
 692
 693 void wxEntryCleanup()
 694 {
 695 #if wxUSE_LOG
 696     // flush the logged messages if any
 697     wxLog *log = wxLog::GetActiveTarget();
 698     if (log != NULL && log->HasPendingMessages())
 699         log->Flush();
 700
 701     // continuing to use user defined log target is unsafe from now on because
 702     // some resources may be already unavailable, so replace it by something
 703     // more safe
 704     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 705     if ( oldlog )
 706         delete oldlog;
 707 #endif // wxUSE_LOG
 708
 709     wxApp::CleanUp();
 710
 711     gdk_threads_leave();
 712 }
 713
 714
 715
 716 int wxEntry( int argc, char *argv[] )
 717 {
 718 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 719     // This seems to be necessary since there are 'rogue'
 720     // objects present at this point (perhaps global objects?)
 721     // Setting a checkpoint will ignore them as far as the
 722     // memory checking facility is concerned.
 723     // Of course you may argue that memory allocated in globals should be
 724     // checked, but this is a reasonable compromise.
 725     wxDebugContext::SetCheckpoint();
 726 #endif
 727     int err = wxEntryStart(argc, argv);
 728     if (err)
 729         return err;
 730
 731     if (!wxTheApp)
 732     {
 733         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 734                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 735
 736         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 737
 738         wxObject *test_app = app_ini();
 739
 740         wxTheApp = (wxApp*) test_app;
 741     }
 742
 743     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 744
 745     wxTheApp->argc = argc;
 746 #if wxUSE_UNICODE
 747     wxTheApp->argv = new wxChar*[argc+1];
 748     int mb_argc = 0;
 749     while (mb_argc < argc)
 750     {
 751         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 752         mb_argc++;
 753     }
 754     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 755 #else
 756     wxTheApp->argv = argv;
 757 #endif
 758
 759     wxString name(wxFileNameFromPath(argv[0]));
 760     wxStripExtension( name );
 761     wxTheApp->SetAppName( name );
 762
 763     int retValue;
 764     retValue = wxEntryInitGui();
 765
 766     // Here frames insert themselves automatically into wxTopLevelWindows by
 767     // getting created in OnInit().
 768     if ( retValue == 0 )
 769     {
 770         if ( !wxTheApp->OnInit() )
 771             retValue = -1;
 772     }
 773
 774     if ( retValue == 0 )
 775     {
 776         /* delete pending toplevel windows (typically a single
 777            dialog) so that, if there isn't any left, we don't
 778            call OnRun() */
 779         wxTheApp->DeletePendingObjects();
 780
 781         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 782
 783         if (wxTheApp->Initialized())
 784         {
 785             wxTheApp->OnRun();
 786
 787             wxWindow *topWindow = wxTheApp->GetTopWindow();
 788             if (topWindow)
 789             {
 790                 /* Forcibly delete the window. */
 791                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 792                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 793                 {
 794                     topWindow->Close( TRUE );
 795                     wxTheApp->DeletePendingObjects();
 796                 }
 797                 else
 798                 {
 799                     delete topWindow;
 800                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 801                 }
 802             }
 803
 804             retValue = wxTheApp->OnExit();
 805         }
 806     }
 807
 808     wxEntryCleanup();
 809
 810     return retValue;
 811 }
 812
 813 #include "wx/gtk/info.xpm"
 814 #include "wx/gtk/error.xpm"
 815 #include "wx/gtk/question.xpm"
 816 #include "wx/gtk/warning.xpm"
 817
 818 wxIcon
 819 wxApp::GetStdIcon(int which) const
 820 {
 821     switch(which)
 822     {
 823         case wxICON_INFORMATION:
 824             return wxIcon(info_xpm);
 825
 826         case wxICON_QUESTION:
 827             return wxIcon(question_xpm);
 828
 829         case wxICON_EXCLAMATION:
 830             return wxIcon(warning_xpm);
 831
 832         default:
 833             wxFAIL_MSG(wxT("requested non existent standard icon"));
 834             // still fall through
 835
 836         case wxICON_HAND:
 837             return wxIcon(error_xpm);
 838     }
 839 }