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 #ifdef __WXUNIVERSAL__
  32     #include "wx/univ/theme.h"
  33     #include "wx/univ/renderer.h"
  34 #endif
  35
  36 #if wxUSE_THREADS
  37     #include "wx/thread.h"
  38 #endif
  39
  40 #include <unistd.h>
  41 #include "wx/gtk/win_gtk.h"
  42
  43 #include <gtk/gtk.h>
  44
  45
  46 //-----------------------------------------------------------------------------
  47 // global data
  48 //-----------------------------------------------------------------------------
  49
  50 wxApp *wxTheApp = (wxApp *)  NULL;
  51 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  52
  53 extern bool g_isIdle;
  54
  55 bool   g_mainThreadLocked = FALSE;
  56 gint   g_pendingTag = 0;
  57
  58 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  59
  60 //-----------------------------------------------------------------------------
  61 // local functions
  62 //-----------------------------------------------------------------------------
  63
  64 /* forward declaration */
  65 gint   wxapp_idle_callback( gpointer WXUNUSED(data) );
  66 gint   wxapp_pending_callback( gpointer WXUNUSED(data) );
  67 void   wxapp_install_idle_handler();
  68
  69 #if wxUSE_THREADS
  70 gint   wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
  71 #endif
  72
  73 //-----------------------------------------------------------------------------
  74 // wxExit
  75 //-----------------------------------------------------------------------------
  76
  77 void wxExit()
  78 {
  79     gtk_main_quit();
  80 }
  81
  82 //-----------------------------------------------------------------------------
  83 // wxYield
  84 //-----------------------------------------------------------------------------
  85
  86 static bool gs_inYield = FALSE;
  87
  88 bool wxYield()
  89 {
  90 #if wxUSE_THREADS
  91     if ( !wxThread::IsMain() )
  92     {
  93         // can't call gtk_main_iteration() from other threads like this
  94         return TRUE;
  95     }
  96 #endif // wxUSE_THREADS
  97
  98 #ifdef __WXDEBUG__
  99     if (gs_inYield)
 100         wxFAIL_MSG( wxT("wxYield called recursively" ) );
 101 #endif
 102
 103     gs_inYield = TRUE;
 104
 105     if (!g_isIdle)
 106     {
 107         // We need to remove idle callbacks or the loop will
 108         // never finish.
 109         gtk_idle_remove( wxTheApp->m_idleTag );
 110         wxTheApp->m_idleTag = 0;
 111         g_isIdle = TRUE;
 112     }
 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     while (gtk_events_pending())
 119         gtk_main_iteration();
 120
 121     /* it's necessary to call ProcessIdle() to update the frames sizes which
 122        might have been changed (it also will update other things set from
 123        OnUpdateUI() which is a nice (and desired) side effect) */
 124     while (wxTheApp->ProcessIdle()) { }
 125
 126     // let the logs be flashed again
 127     wxLog::Resume();
 128
 129     gs_inYield = FALSE;
 130
 131     return TRUE;
 132 }
 133
 134 //-----------------------------------------------------------------------------
 135 // wxYieldIfNeeded
 136 // Like wxYield, but fails silently if the yield is recursive.
 137 //-----------------------------------------------------------------------------
 138
 139 bool wxYieldIfNeeded()
 140 {
 141     if (gs_inYield)
 142         return FALSE;
 143
 144     return wxYield();
 145 }
 146
 147 //-----------------------------------------------------------------------------
 148 // wxWakeUpIdle
 149 //-----------------------------------------------------------------------------
 150
 151 void wxWakeUpIdle()
 152 {
 153 #if wxUSE_THREADS
 154     if (!wxThread::IsMain())
 155         wxMutexGuiEnter();
 156 #endif
 157
 158     if (g_isIdle)
 159         wxapp_install_idle_handler();
 160
 161 #if wxUSE_THREADS
 162     if (!wxThread::IsMain())
 163         wxMutexGuiLeave();
 164 #endif
 165 }
 166
 167 //-----------------------------------------------------------------------------
 168 // local functions
 169 //-----------------------------------------------------------------------------
 170
 171 gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 172 {
 173     if (!wxTheApp) return TRUE;
 174
 175     // when getting called from GDK's time-out handler
 176     // we are no longer within GDK's grab on the GUI
 177     // thread so we must lock it here ourselves
 178     gdk_threads_enter();
 179
 180     // Sent idle event to all who request them
 181     wxTheApp->ProcessPendingEvents();
 182
 183     g_pendingTag = 0;
 184
 185     /* flush the logged messages if any */
 186 #if wxUSE_LOG
 187     wxLog::FlushActive();
 188 #endif // wxUSE_LOG
 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 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 199 {
 200     if (!wxTheApp)
 201         return TRUE;
 202
 203 #ifdef __WXDEBUG__
 204     // don't generate the idle events while the assert modal dialog is shown,
 205     // this completely confuses the apps which don't expect to be reentered
 206     // from some safely-looking functions
 207     if ( wxTheApp->IsInAssert() )
 208     {
 209         return TRUE;
 210     }
 211 #endif // __WXDEBUG__
 212
 213     // when getting called from GDK's time-out handler
 214     // we are no longer within GDK's grab on the GUI
 215     // thread so we must lock it here ourselves
 216     gdk_threads_enter();
 217
 218     /* Indicate that we are now in idle mode - even so deeply
 219        in idle mode that we don't get any idle events anymore.
 220        this is like wxMSW where an idle event is sent only
 221        once each time after the event queue has been completely
 222        emptied */
 223     g_isIdle = TRUE;
 224     wxTheApp->m_idleTag = 0;
 225
 226     // Sent idle event to all who request them as long as they do
 227     while (wxTheApp->ProcessIdle())
 228         ;
 229
 230     // Release lock again
 231     gdk_threads_leave();
 232
 233     // Return FALSE to indicate that no more idle events are
 234     // to be sent (single shot instead of continuous stream)
 235     return FALSE;
 236 }
 237
 238 void wxapp_install_idle_handler()
 239 {
 240     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 241
 242     g_isIdle = FALSE;
 243
 244     if (g_pendingTag == 0)
 245         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 246
 247     /* This routine gets called by all event handlers
 248        indicating that the idle is over. It may also
 249        get called from other thread for sending events
 250        to the main thread (and processing these in
 251        idle time). Very low priority. */
 252
 253     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 254 }
 255
 256 #if wxUSE_THREADS
 257
 258 static int g_threadUninstallLevel = 0;
 259
 260 void wxapp_install_thread_wakeup()
 261 {
 262     g_threadUninstallLevel++;
 263
 264     if (g_threadUninstallLevel != 1) return;
 265
 266     if (wxTheApp->m_wakeUpTimerTag) return;
 267
 268     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 269 }
 270
 271 void wxapp_uninstall_thread_wakeup()
 272 {
 273     g_threadUninstallLevel--;
 274
 275     if (g_threadUninstallLevel != 0) return;
 276
 277     if (!wxTheApp->m_wakeUpTimerTag) return;
 278
 279     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 280     wxTheApp->m_wakeUpTimerTag = 0;
 281 }
 282
 283 gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 284 {
 285     // when getting called from GDK's time-out handler
 286     // we are no longer within GDK's grab on the GUI
 287     // thread so we must lock it here ourselves
 288     gdk_threads_enter();
 289
 290     wxapp_uninstall_thread_wakeup();
 291
 292     // unblock other threads wishing to do some GUI things
 293     wxMutexGuiLeave();
 294
 295     g_mainThreadLocked = TRUE;
 296
 297     // wake up other threads
 298     wxUsleep( 1 );
 299
 300     // block other thread again
 301     wxMutexGuiEnter();
 302
 303     g_mainThreadLocked = FALSE;
 304
 305     wxapp_install_thread_wakeup();
 306
 307     // release lock again
 308     gdk_threads_leave();
 309
 310     return TRUE;
 311 }
 312
 313 #endif // wxUSE_THREADS
 314
 315 //-----------------------------------------------------------------------------
 316 // wxApp
 317 //-----------------------------------------------------------------------------
 318
 319 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 320
 321 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 322     EVT_IDLE(wxApp::OnIdle)
 323 END_EVENT_TABLE()
 324
 325 wxApp::wxApp()
 326 {
 327     m_initialized = FALSE;
 328 #ifdef __WXDEBUG__
 329     m_isInAssert = FALSE;
 330 #endif // __WXDEBUG__
 331
 332     m_idleTag = 0;
 333     wxapp_install_idle_handler();
 334
 335 #if wxUSE_THREADS
 336     m_wakeUpTimerTag = 0;
 337     wxapp_install_thread_wakeup();
 338 #endif
 339
 340     m_colorCube = (unsigned char*) NULL;
 341
 342     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 343     m_glVisualInfo = (void *) NULL;
 344 }
 345
 346 wxApp::~wxApp()
 347 {
 348     if (m_idleTag) gtk_idle_remove( m_idleTag );
 349
 350 #if wxUSE_THREADS
 351     wxapp_uninstall_thread_wakeup();
 352 #endif
 353
 354     if (m_colorCube) free(m_colorCube);
 355 }
 356
 357 bool wxApp::OnInitGui()
 358 {
 359     if ( !wxAppBase::OnInitGui() )
 360         return FALSE;
 361
 362     GdkVisual *visual = gdk_visual_get_system();
 363
 364     // if this is a wxGLApp (derived from wxApp), and we've already
 365     // chosen a specific visual, then derive the GdkVisual from that
 366     if (m_glVisualInfo != NULL) {
 367 #ifdef __WXGTK20__
 368         /* seems gtk_widget_set_default_visual no longer exists? */
 369         GdkVisual* vis = gtk_widget_get_default_visual();
 370 #else
 371         GdkVisual* vis = gdkx_visual_get(
 372             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 373         gtk_widget_set_default_visual( vis );
 374 #endif
 375
 376         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 377         gtk_widget_set_default_colormap( colormap );
 378
 379         visual = vis;
 380     }
 381
 382     /* on some machines, the default visual is just 256 colours, so
 383        we make sure we get the best. this can sometimes be wasteful,
 384        of course, but what do these guys pay $30.000 for? */
 385
 386     else if ((gdk_visual_get_best() != gdk_visual_get_system()) &&
 387         (m_useBestVisual))
 388     {
 389 #ifdef __WXGTK20__
 390         /* seems gtk_widget_set_default_visual no longer exists? */
 391         GdkVisual* vis = gtk_widget_get_default_visual();
 392 #else
 393         GdkVisual* vis = gdk_visual_get_best();
 394         gtk_widget_set_default_visual( vis );
 395 #endif
 396
 397         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 398         gtk_widget_set_default_colormap( colormap );
 399
 400         visual = vis;
 401     }
 402
 403     /* Nothing to do for 15, 16, 24, 32 bit displays */
 404     if (visual->depth > 8) return TRUE;
 405
 406     /* initialize color cube for 8-bit color reduction dithering */
 407
 408     GdkColormap *cmap = gtk_widget_get_default_colormap();
 409
 410     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 411
 412     for (int r = 0; r < 32; r++)
 413     {
 414         for (int g = 0; g < 32; g++)
 415         {
 416             for (int b = 0; b < 32; b++)
 417             {
 418                 int rr = (r << 3) | (r >> 2);
 419                 int gg = (g << 3) | (g >> 2);
 420                 int bb = (b << 3) | (b >> 2);
 421
 422                 int index = -1;
 423
 424                 GdkColor *colors = cmap->colors;
 425                 if (colors)
 426                 {
 427                     int max = 3 * 65536;
 428
 429                     for (int i = 0; i < cmap->size; i++)
 430                     {
 431                         int rdiff = ((rr << 8) - colors[i].red);
 432                         int gdiff = ((gg << 8) - colors[i].green);
 433                         int bdiff = ((bb << 8) - colors[i].blue);
 434                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 435                         if (sum < max)
 436                         {
 437                             index = i; max = sum;
 438                         }
 439                     }
 440                 }
 441                 else
 442                 {
 443 #if (GTK_MINOR_VERSION > 0)
 444                     /* assume 8-bit true or static colors. this really
 445                        exists. */
 446                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 447                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 448                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 449                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 450 #else
 451                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 452 #endif
 453                 }
 454                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 455             }
 456         }
 457     }
 458
 459     return TRUE;
 460 }
 461
 462 bool wxApp::ProcessIdle()
 463 {
 464     wxIdleEvent event;
 465     event.SetEventObject( this );
 466     ProcessEvent( event );
 467
 468     return event.MoreRequested();
 469 }
 470
 471 void wxApp::OnIdle( wxIdleEvent &event )
 472 {
 473     static bool s_inOnIdle = FALSE;
 474
 475     /* Avoid recursion (via ProcessEvent default case) */
 476     if (s_inOnIdle)
 477         return;
 478
 479     s_inOnIdle = TRUE;
 480
 481     /* Resend in the main thread events which have been prepared in other
 482        threads */
 483     ProcessPendingEvents();
 484
 485     /* 'Garbage' collection of windows deleted with Close(). */
 486     DeletePendingObjects();
 487
 488     /* Send OnIdle events to all windows */
 489     bool needMore = SendIdleEvents();
 490
 491     if (needMore)
 492         event.RequestMore(TRUE);
 493
 494     s_inOnIdle = FALSE;
 495 }
 496
 497 bool wxApp::SendIdleEvents()
 498 {
 499     bool needMore = FALSE;
 500
 501     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 502     while (node)
 503     {
 504         wxWindow* win = node->GetData();
 505         if (SendIdleEvents(win))
 506             needMore = TRUE;
 507         node = node->GetNext();
 508     }
 509
 510     return needMore;
 511 }
 512
 513 bool wxApp::SendIdleEvents( wxWindow* win )
 514 {
 515     bool needMore = FALSE;
 516
 517     wxIdleEvent event;
 518     event.SetEventObject(win);
 519
 520     win->GetEventHandler()->ProcessEvent(event);
 521
 522     win->OnInternalIdle();
 523
 524     if (event.MoreRequested())
 525         needMore = TRUE;
 526
 527     wxNode* node = win->GetChildren().First();
 528     while (node)
 529     {
 530         wxWindow* win = (wxWindow*) node->Data();
 531         if (SendIdleEvents(win))
 532             needMore = TRUE;
 533
 534         node = node->Next();
 535     }
 536     return needMore ;
 537 }
 538
 539 int wxApp::MainLoop()
 540 {
 541     gtk_main();
 542     return 0;
 543 }
 544
 545 void wxApp::ExitMainLoop()
 546 {
 547     if (gtk_main_level() > 0)
 548         gtk_main_quit();
 549 }
 550
 551 bool wxApp::Initialized()
 552 {
 553     return m_initialized;
 554 }
 555
 556 bool wxApp::Pending()
 557 {
 558     return (gtk_events_pending() > 0);
 559 }
 560
 561 void wxApp::Dispatch()
 562 {
 563     gtk_main_iteration();
 564 }
 565
 566 void wxApp::DeletePendingObjects()
 567 {
 568     wxNode *node = wxPendingDelete.First();
 569     while (node)
 570     {
 571         wxObject *obj = (wxObject *)node->Data();
 572
 573         delete obj;
 574
 575         if (wxPendingDelete.Find(obj))
 576             delete node;
 577
 578         node = wxPendingDelete.First();
 579     }
 580 }
 581
 582 bool wxApp::Initialize()
 583 {
 584     wxBuffer = new wxChar[BUFSIZ + 512];
 585
 586     wxClassInfo::InitializeClasses();
 587
 588     wxSystemSettings::Init();
 589
 590 #if wxUSE_INTL
 591     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 592 #endif
 593
 594     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 595     // create a module for that as it's part of the core.
 596 #if wxUSE_THREADS
 597     wxPendingEvents = new wxList();
 598     wxPendingEventsLocker = new wxCriticalSection();
 599 #endif
 600
 601     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 602     wxTheColourDatabase->Initialize();
 603
 604     wxInitializeStockLists();
 605     wxInitializeStockObjects();
 606
 607 #if wxUSE_WX_RESOURCES
 608     wxInitializeResourceSystem();
 609 #endif
 610
 611     wxModule::RegisterModules();
 612     if (!wxModule::InitializeModules()) return FALSE;
 613
 614     return TRUE;
 615 }
 616
 617 void wxApp::CleanUp()
 618 {
 619     wxModule::CleanUpModules();
 620
 621 #if wxUSE_WX_RESOURCES
 622     wxCleanUpResourceSystem();
 623 #endif
 624
 625     if (wxTheColourDatabase)
 626         delete wxTheColourDatabase;
 627
 628     wxTheColourDatabase = (wxColourDatabase*) NULL;
 629
 630     wxDeleteStockObjects();
 631
 632     wxDeleteStockLists();
 633
 634     delete wxTheApp;
 635     wxTheApp = (wxApp*) NULL;
 636
 637     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 638     // create a module for that as it's part of the core.
 639 #if wxUSE_THREADS
 640     delete wxPendingEvents;
 641     delete wxPendingEventsLocker;
 642 #endif
 643
 644     wxSystemSettings::Done();
 645
 646     delete[] wxBuffer;
 647
 648     wxClassInfo::CleanUpClasses();
 649
 650     // check for memory leaks
 651 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 652     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 653     {
 654         wxLogDebug(wxT("There were memory leaks.\n"));
 655         wxDebugContext::Dump();
 656         wxDebugContext::PrintStatistics();
 657     }
 658 #endif // Debug
 659
 660 #if wxUSE_LOG
 661     // do this as the very last thing because everything else can log messages
 662     wxLog::DontCreateOnDemand();
 663
 664     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 665     if (oldLog)
 666         delete oldLog;
 667 #endif // wxUSE_LOG
 668 }
 669
 670 //-----------------------------------------------------------------------------
 671 // Access to the root window global
 672 //-----------------------------------------------------------------------------
 673
 674 GtkWidget* wxGetRootWindow()
 675 {
 676     if (gs_RootWindow == NULL) {
 677         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 678         gtk_widget_realize( gs_RootWindow );
 679     }
 680     return gs_RootWindow;
 681 }
 682
 683 //-----------------------------------------------------------------------------
 684 // wxEntry
 685 //-----------------------------------------------------------------------------
 686
 687
 688 int wxEntryStart( int argc, char *argv[] )
 689 {
 690 #if wxUSE_THREADS
 691     /* GTK 1.2 up to version 1.2.3 has broken threads */
 692    if ((gtk_major_version == 1) &&
 693         (gtk_minor_version == 2) &&
 694         (gtk_micro_version < 4))
 695     {
 696         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 697     }
 698     else
 699     {
 700         g_thread_init(NULL);
 701     }
 702 #endif
 703
 704     gtk_set_locale();
 705
 706     // We should have the wxUSE_WCHAR_T test on the _outside_
 707 #if wxUSE_WCHAR_T
 708 #if defined(__WXGTK20__)
 709     // gtk+ 2.0 supports Unicode through UTF-8 strings
 710     wxConvCurrent = &wxConvUTF8;
 711 #else
 712     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 713 #endif
 714 #else
 715     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 716 #endif
 717
 718     gdk_threads_enter();
 719
 720     gtk_init( &argc, &argv );
 721
 722     wxSetDetectableAutoRepeat( TRUE );
 723
 724     if (!wxApp::Initialize())
 725     {
 726         gdk_threads_leave();
 727         return -1;
 728     }
 729
 730     return 0;
 731 }
 732
 733
 734 int wxEntryInitGui()
 735 {
 736     int retValue = 0;
 737
 738     if ( !wxTheApp->OnInitGui() )
 739         retValue = -1;
 740
 741     wxGetRootWindow();
 742
 743     return retValue;
 744 }
 745
 746
 747 void wxEntryCleanup()
 748 {
 749 #if wxUSE_LOG
 750     // flush the logged messages if any
 751     wxLog *log = wxLog::GetActiveTarget();
 752     if (log != NULL && log->HasPendingMessages())
 753         log->Flush();
 754
 755     // continuing to use user defined log target is unsafe from now on because
 756     // some resources may be already unavailable, so replace it by something
 757     // more safe
 758     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 759     if ( oldlog )
 760         delete oldlog;
 761 #endif // wxUSE_LOG
 762
 763     wxApp::CleanUp();
 764
 765     gdk_threads_leave();
 766 }
 767
 768
 769
 770 int wxEntry( int argc, char *argv[] )
 771 {
 772 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 773     // This seems to be necessary since there are 'rogue'
 774     // objects present at this point (perhaps global objects?)
 775     // Setting a checkpoint will ignore them as far as the
 776     // memory checking facility is concerned.
 777     // Of course you may argue that memory allocated in globals should be
 778     // checked, but this is a reasonable compromise.
 779     wxDebugContext::SetCheckpoint();
 780 #endif
 781     int err = wxEntryStart(argc, argv);
 782     if (err)
 783         return err;
 784
 785     if (!wxTheApp)
 786     {
 787         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 788                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 789
 790         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 791
 792         wxObject *test_app = app_ini();
 793
 794         wxTheApp = (wxApp*) test_app;
 795     }
 796
 797     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 798
 799     wxTheApp->argc = argc;
 800 #if wxUSE_UNICODE
 801     wxTheApp->argv = new wxChar*[argc+1];
 802     int mb_argc = 0;
 803     while (mb_argc < argc)
 804     {
 805         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 806         mb_argc++;
 807     }
 808     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 809 #else
 810     wxTheApp->argv = argv;
 811 #endif
 812
 813     wxString name(wxFileNameFromPath(argv[0]));
 814     wxStripExtension( name );
 815     wxTheApp->SetAppName( name );
 816
 817     int retValue;
 818     retValue = wxEntryInitGui();
 819
 820     // Here frames insert themselves automatically into wxTopLevelWindows by
 821     // getting created in OnInit().
 822     if ( retValue == 0 )
 823     {
 824         if ( !wxTheApp->OnInit() )
 825             retValue = -1;
 826     }
 827
 828     if ( retValue == 0 )
 829     {
 830         /* delete pending toplevel windows (typically a single
 831            dialog) so that, if there isn't any left, we don't
 832            call OnRun() */
 833         wxTheApp->DeletePendingObjects();
 834
 835         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 836
 837         if (wxTheApp->Initialized())
 838         {
 839             wxTheApp->OnRun();
 840
 841             wxWindow *topWindow = wxTheApp->GetTopWindow();
 842             if (topWindow)
 843             {
 844                 /* Forcibly delete the window. */
 845                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 846                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 847                 {
 848                     topWindow->Close( TRUE );
 849                     wxTheApp->DeletePendingObjects();
 850                 }
 851                 else
 852                 {
 853                     delete topWindow;
 854                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 855                 }
 856             }
 857
 858             retValue = wxTheApp->OnExit();
 859         }
 860     }
 861
 862     wxEntryCleanup();
 863
 864     return retValue;
 865 }
 866
 867 #ifndef __WXUNIVERSAL__
 868
 869 #include "wx/gtk/info.xpm"
 870 #include "wx/gtk/error.xpm"
 871 #include "wx/gtk/question.xpm"
 872 #include "wx/gtk/warning.xpm"
 873
 874 wxIcon wxApp::GetStdIcon(int which) const
 875 {
 876     switch(which)
 877     {
 878         case wxICON_INFORMATION:
 879             return wxIcon(info_xpm);
 880
 881         case wxICON_QUESTION:
 882             return wxIcon(question_xpm);
 883
 884         case wxICON_EXCLAMATION:
 885             return wxIcon(warning_xpm);
 886
 887         default:
 888             wxFAIL_MSG(wxT("requested non existent standard icon"));
 889             // still fall through
 890
 891         case wxICON_HAND:
 892             return wxIcon(error_xpm);
 893     }
 894 }
 895 #else
 896 wxIcon wxApp::GetStdIcon(int which) const
 897 {
 898     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 899 }
 900 #endif // !__WXUNIVERSAL__
 901
 902
 903 #ifdef __WXDEBUG__
 904
 905 void wxApp::OnAssert(const wxChar *file, int line, const wxChar *msg)
 906 {
 907     m_isInAssert = TRUE;
 908
 909     wxAppBase::OnAssert(file, line, msg);
 910
 911     m_isInAssert = FALSE;
 912 }
 913
 914 #endif // __WXDEBUG__
 915