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 #include "wx/gtk/win_gtk.h"
  37
  38 #include <gtk/gtk.h>
  39
  40
  41 //-----------------------------------------------------------------------------
  42 // global data
  43 //-----------------------------------------------------------------------------
  44
  45 wxApp *wxTheApp = (wxApp *)  NULL;
  46 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  47
  48 extern bool g_isIdle;
  49
  50 bool   g_mainThreadLocked = FALSE;
  51 gint   g_pendingTag = 0;
  52
  53 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  54
  55 //-----------------------------------------------------------------------------
  56 // local functions
  57 //-----------------------------------------------------------------------------
  58
  59 /* forward declaration */
  60 gint   wxapp_idle_callback( gpointer WXUNUSED(data) );
  61 gint   wxapp_pending_callback( gpointer WXUNUSED(data) );
  62 void   wxapp_install_idle_handler();
  63
  64 #if wxUSE_THREADS
  65 gint   wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) );
  66 #endif
  67
  68 //-----------------------------------------------------------------------------
  69 // wxExit
  70 //-----------------------------------------------------------------------------
  71
  72 void wxExit()
  73 {
  74     gtk_main_quit();
  75 }
  76
  77 //-----------------------------------------------------------------------------
  78 // wxYield
  79 //-----------------------------------------------------------------------------
  80
  81 static bool gs_inYield = FALSE;
  82
  83 bool wxYield()
  84 {
  85 #if wxUSE_THREADS
  86     if ( !wxThread::IsMain() )
  87     {
  88         // can't call gtk_main_iteration() from other threads like this
  89         return TRUE;
  90     }
  91 #endif // wxUSE_THREADS
  92
  93 #ifdef __WXDEBUG__
  94     if (gs_inYield)
  95         wxFAIL_MSG( wxT("wxYield called recursively" ) );
  96 #endif
  97
  98     gs_inYield = TRUE;
  99
 100     if (!g_isIdle)
 101     {
 102         // We need to remove idle callbacks or the loop will
 103         // never finish.
 104         gtk_idle_remove( wxTheApp->m_idleTag );
 105         wxTheApp->m_idleTag = 0;
 106         g_isIdle = TRUE;
 107     }
 108
 109     // disable log flushing from here because a call to wxYield() shouldn't
 110     // normally result in message boxes popping up &c
 111     wxLog::Suspend();
 112
 113     while (gtk_events_pending())
 114         gtk_main_iteration();
 115
 116     /* it's necessary to call ProcessIdle() to update the frames sizes which
 117        might have been changed (it also will update other things set from
 118        OnUpdateUI() which is a nice (and desired) side effect) */
 119     while (wxTheApp->ProcessIdle()) { }
 120
 121     // let the logs be flashed again
 122     wxLog::Resume();
 123
 124     gs_inYield = FALSE;
 125
 126     return TRUE;
 127 }
 128
 129 //-----------------------------------------------------------------------------
 130 // wxYieldIfNeeded
 131 // Like wxYield, but fails silently if the yield is recursive.
 132 //-----------------------------------------------------------------------------
 133
 134 bool wxYieldIfNeeded()
 135 {
 136     if (gs_inYield)
 137         return FALSE;
 138
 139     return wxYield();
 140 }
 141
 142 //-----------------------------------------------------------------------------
 143 // wxWakeUpIdle
 144 //-----------------------------------------------------------------------------
 145
 146 void wxWakeUpIdle()
 147 {
 148 #if wxUSE_THREADS
 149     if (!wxThread::IsMain())
 150         wxMutexGuiEnter();
 151 #endif
 152
 153     if (g_isIdle)
 154         wxapp_install_idle_handler();
 155
 156 #if wxUSE_THREADS
 157     if (!wxThread::IsMain())
 158         wxMutexGuiLeave();
 159 #endif
 160 }
 161
 162 //-----------------------------------------------------------------------------
 163 // local functions
 164 //-----------------------------------------------------------------------------
 165
 166 gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 167 {
 168     if (!wxTheApp) return TRUE;
 169
 170     // when getting called from GDK's time-out handler
 171     // we are no longer within GDK's grab on the GUI
 172     // thread so we must lock it here ourselves
 173     gdk_threads_enter();
 174
 175     // Sent idle event to all who request them
 176     wxTheApp->ProcessPendingEvents();
 177
 178     g_pendingTag = 0;
 179
 180     /* flush the logged messages if any */
 181 #if wxUSE_LOG
 182     wxLog::FlushActive();
 183 #endif // wxUSE_LOG
 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 gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 194 {
 195     if (!wxTheApp)
 196         return TRUE;
 197
 198 #ifdef __WXDEBUG__
 199     // don't generate the idle events while the assert modal dialog is shown,
 200     // this completely confuses the apps which don't expect to be reentered
 201     // from some safely-looking functions
 202     if ( wxTheApp->IsInAssert() )
 203     {
 204         return TRUE;
 205     }
 206 #endif // __WXDEBUG__
 207
 208     // when getting called from GDK's time-out handler
 209     // we are no longer within GDK's grab on the GUI
 210     // thread so we must lock it here ourselves
 211     gdk_threads_enter();
 212
 213     /* Indicate that we are now in idle mode - even so deeply
 214        in idle mode that we don't get any idle events anymore.
 215        this is like wxMSW where an idle event is sent only
 216        once each time after the event queue has been completely
 217        emptied */
 218     g_isIdle = TRUE;
 219     wxTheApp->m_idleTag = 0;
 220
 221     // Sent idle event to all who request them as long as they do
 222     while (wxTheApp->ProcessIdle())
 223         ;
 224
 225     // Release lock again
 226     gdk_threads_leave();
 227
 228     // Return FALSE to indicate that no more idle events are
 229     // to be sent (single shot instead of continuous stream)
 230     return FALSE;
 231 }
 232
 233 void wxapp_install_idle_handler()
 234 {
 235     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 236
 237     g_isIdle = FALSE;
 238
 239     if (g_pendingTag == 0)
 240         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 241
 242     /* This routine gets called by all event handlers
 243        indicating that the idle is over. It may also
 244        get called from other thread for sending events
 245        to the main thread (and processing these in
 246        idle time). Very low priority. */
 247
 248     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 249 }
 250
 251 #if wxUSE_THREADS
 252
 253 static int g_threadUninstallLevel = 0;
 254
 255 void wxapp_install_thread_wakeup()
 256 {
 257     g_threadUninstallLevel++;
 258
 259     if (g_threadUninstallLevel != 1) return;
 260
 261     if (wxTheApp->m_wakeUpTimerTag) return;
 262
 263     wxTheApp->m_wakeUpTimerTag = gtk_timeout_add( 50, wxapp_wakeup_timerout_callback, (gpointer) NULL );
 264 }
 265
 266 void wxapp_uninstall_thread_wakeup()
 267 {
 268     g_threadUninstallLevel--;
 269
 270     if (g_threadUninstallLevel != 0) return;
 271
 272     if (!wxTheApp->m_wakeUpTimerTag) return;
 273
 274     gtk_timeout_remove( wxTheApp->m_wakeUpTimerTag );
 275     wxTheApp->m_wakeUpTimerTag = 0;
 276 }
 277
 278 gint wxapp_wakeup_timerout_callback( gpointer WXUNUSED(data) )
 279 {
 280     // when getting called from GDK's time-out handler
 281     // we are no longer within GDK's grab on the GUI
 282     // thread so we must lock it here ourselves
 283     gdk_threads_enter();
 284
 285     wxapp_uninstall_thread_wakeup();
 286
 287     // unblock other threads wishing to do some GUI things
 288     wxMutexGuiLeave();
 289
 290     g_mainThreadLocked = TRUE;
 291
 292     // wake up other threads
 293     wxUsleep( 1 );
 294
 295     // block other thread again
 296     wxMutexGuiEnter();
 297
 298     g_mainThreadLocked = FALSE;
 299
 300     wxapp_install_thread_wakeup();
 301
 302     // release lock again
 303     gdk_threads_leave();
 304
 305     return TRUE;
 306 }
 307
 308 #endif // wxUSE_THREADS
 309
 310 //-----------------------------------------------------------------------------
 311 // wxApp
 312 //-----------------------------------------------------------------------------
 313
 314 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 315
 316 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 317     EVT_IDLE(wxApp::OnIdle)
 318 END_EVENT_TABLE()
 319
 320 wxApp::wxApp()
 321 {
 322     m_initialized = FALSE;
 323 #ifdef __WXDEBUG__
 324     m_isInAssert = FALSE;
 325 #endif // __WXDEBUG__
 326
 327     m_idleTag = 0;
 328     wxapp_install_idle_handler();
 329
 330 #if wxUSE_THREADS
 331     m_wakeUpTimerTag = 0;
 332     wxapp_install_thread_wakeup();
 333 #endif
 334
 335     m_colorCube = (unsigned char*) NULL;
 336
 337     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 338     m_glVisualInfo = (void *) NULL;
 339 }
 340
 341 wxApp::~wxApp()
 342 {
 343     if (m_idleTag) gtk_idle_remove( m_idleTag );
 344
 345 #if wxUSE_THREADS
 346     wxapp_uninstall_thread_wakeup();
 347 #endif
 348
 349     if (m_colorCube) free(m_colorCube);
 350 }
 351
 352 bool wxApp::OnInitGui()
 353 {
 354     if ( !wxAppBase::OnInitGui() )
 355         return FALSE;
 356
 357     GdkVisual *visual = gdk_visual_get_system();
 358
 359     // if this is a wxGLApp (derived from wxApp), and we've already
 360     // chosen a specific visual, then derive the GdkVisual from that
 361     if (m_glVisualInfo != NULL) {
 362 #ifdef __WXGTK20__
 363         /* seems gtk_widget_set_default_visual no longer exists? */
 364         GdkVisual* vis = gtk_widget_get_default_visual();
 365 #else
 366         GdkVisual* vis = gdkx_visual_get(
 367             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 368         gtk_widget_set_default_visual( vis );
 369 #endif
 370
 371         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 372         gtk_widget_set_default_colormap( colormap );
 373
 374         visual = vis;
 375     }
 376
 377     /* on some machines, the default visual is just 256 colours, so
 378        we make sure we get the best. this can sometimes be wasteful,
 379        of course, but what do these guys pay $30.000 for? */
 380
 381     else if ((gdk_visual_get_best() != gdk_visual_get_system()) &&
 382         (m_useBestVisual))
 383     {
 384 #ifdef __WXGTK20__
 385         /* seems gtk_widget_set_default_visual no longer exists? */
 386         GdkVisual* vis = gtk_widget_get_default_visual();
 387 #else
 388         GdkVisual* vis = gdk_visual_get_best();
 389         gtk_widget_set_default_visual( vis );
 390 #endif
 391
 392         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 393         gtk_widget_set_default_colormap( colormap );
 394
 395         visual = vis;
 396     }
 397
 398     /* Nothing to do for 15, 16, 24, 32 bit displays */
 399     if (visual->depth > 8) return TRUE;
 400
 401     /* initialize color cube for 8-bit color reduction dithering */
 402
 403     GdkColormap *cmap = gtk_widget_get_default_colormap();
 404
 405     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 406
 407     for (int r = 0; r < 32; r++)
 408     {
 409         for (int g = 0; g < 32; g++)
 410         {
 411             for (int b = 0; b < 32; b++)
 412             {
 413                 int rr = (r << 3) | (r >> 2);
 414                 int gg = (g << 3) | (g >> 2);
 415                 int bb = (b << 3) | (b >> 2);
 416
 417                 int index = -1;
 418
 419                 GdkColor *colors = cmap->colors;
 420                 if (colors)
 421                 {
 422                     int max = 3 * 65536;
 423
 424                     for (int i = 0; i < cmap->size; i++)
 425                     {
 426                         int rdiff = ((rr << 8) - colors[i].red);
 427                         int gdiff = ((gg << 8) - colors[i].green);
 428                         int bdiff = ((bb << 8) - colors[i].blue);
 429                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 430                         if (sum < max)
 431                         {
 432                             index = i; max = sum;
 433                         }
 434                     }
 435                 }
 436                 else
 437                 {
 438 #if (GTK_MINOR_VERSION > 0)
 439                     /* assume 8-bit true or static colors. this really
 440                        exists. */
 441                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 442                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 443                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 444                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 445 #else
 446                     wxFAIL_MSG( wxT("Unsupported graphics hardware") );
 447 #endif
 448                 }
 449                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 450             }
 451         }
 452     }
 453
 454     return TRUE;
 455 }
 456
 457 bool wxApp::ProcessIdle()
 458 {
 459     wxIdleEvent event;
 460     event.SetEventObject( this );
 461     ProcessEvent( event );
 462
 463     return event.MoreRequested();
 464 }
 465
 466 void wxApp::OnIdle( wxIdleEvent &event )
 467 {
 468     static bool s_inOnIdle = FALSE;
 469
 470     /* Avoid recursion (via ProcessEvent default case) */
 471     if (s_inOnIdle)
 472         return;
 473
 474     s_inOnIdle = TRUE;
 475
 476     /* Resend in the main thread events which have been prepared in other
 477        threads */
 478     ProcessPendingEvents();
 479
 480     /* 'Garbage' collection of windows deleted with Close(). */
 481     DeletePendingObjects();
 482
 483     /* Send OnIdle events to all windows */
 484     bool needMore = SendIdleEvents();
 485
 486     if (needMore)
 487         event.RequestMore(TRUE);
 488
 489     s_inOnIdle = FALSE;
 490 }
 491
 492 bool wxApp::SendIdleEvents()
 493 {
 494     bool needMore = FALSE;
 495
 496     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 497     while (node)
 498     {
 499         wxWindow* win = node->GetData();
 500         if (SendIdleEvents(win))
 501             needMore = TRUE;
 502         node = node->GetNext();
 503     }
 504
 505     return needMore;
 506 }
 507
 508 bool wxApp::SendIdleEvents( wxWindow* win )
 509 {
 510     bool needMore = FALSE;
 511
 512     wxIdleEvent event;
 513     event.SetEventObject(win);
 514
 515     win->GetEventHandler()->ProcessEvent(event);
 516
 517     win->OnInternalIdle();
 518
 519     if (event.MoreRequested())
 520         needMore = TRUE;
 521
 522     wxNode* node = win->GetChildren().First();
 523     while (node)
 524     {
 525         wxWindow* win = (wxWindow*) node->Data();
 526         if (SendIdleEvents(win))
 527             needMore = TRUE;
 528
 529         node = node->Next();
 530     }
 531     return needMore ;
 532 }
 533
 534 int wxApp::MainLoop()
 535 {
 536     gtk_main();
 537     return 0;
 538 }
 539
 540 void wxApp::ExitMainLoop()
 541 {
 542     if (gtk_main_level() > 0)
 543         gtk_main_quit();
 544 }
 545
 546 bool wxApp::Initialized()
 547 {
 548     return m_initialized;
 549 }
 550
 551 bool wxApp::Pending()
 552 {
 553     return (gtk_events_pending() > 0);
 554 }
 555
 556 void wxApp::Dispatch()
 557 {
 558     gtk_main_iteration();
 559 }
 560
 561 void wxApp::DeletePendingObjects()
 562 {
 563     wxNode *node = wxPendingDelete.First();
 564     while (node)
 565     {
 566         wxObject *obj = (wxObject *)node->Data();
 567
 568         delete obj;
 569
 570         if (wxPendingDelete.Find(obj))
 571             delete node;
 572
 573         node = wxPendingDelete.First();
 574     }
 575 }
 576
 577 bool wxApp::Initialize()
 578 {
 579     wxBuffer = new wxChar[BUFSIZ + 512];
 580
 581     wxClassInfo::InitializeClasses();
 582
 583     wxSystemSettings::Init();
 584
 585 #if wxUSE_INTL
 586     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 587 #endif
 588
 589     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 590     // create a module for that as it's part of the core.
 591 #if wxUSE_THREADS
 592     wxPendingEvents = new wxList();
 593     wxPendingEventsLocker = new wxCriticalSection();
 594 #endif
 595
 596     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 597     wxTheColourDatabase->Initialize();
 598
 599     wxInitializeStockLists();
 600     wxInitializeStockObjects();
 601
 602 #if wxUSE_WX_RESOURCES
 603     wxInitializeResourceSystem();
 604 #endif
 605
 606     wxModule::RegisterModules();
 607     if (!wxModule::InitializeModules()) return FALSE;
 608
 609     return TRUE;
 610 }
 611
 612 void wxApp::CleanUp()
 613 {
 614     wxModule::CleanUpModules();
 615
 616 #if wxUSE_WX_RESOURCES
 617     wxCleanUpResourceSystem();
 618 #endif
 619
 620     if (wxTheColourDatabase)
 621         delete wxTheColourDatabase;
 622
 623     wxTheColourDatabase = (wxColourDatabase*) NULL;
 624
 625     wxDeleteStockObjects();
 626
 627     wxDeleteStockLists();
 628
 629     delete wxTheApp;
 630     wxTheApp = (wxApp*) NULL;
 631
 632     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 633     // create a module for that as it's part of the core.
 634 #if wxUSE_THREADS
 635     delete wxPendingEvents;
 636     delete wxPendingEventsLocker;
 637 #endif
 638
 639     wxSystemSettings::Done();
 640
 641     delete[] wxBuffer;
 642
 643     wxClassInfo::CleanUpClasses();
 644
 645     // check for memory leaks
 646 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 647     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 648     {
 649         wxLogDebug(wxT("There were memory leaks.\n"));
 650         wxDebugContext::Dump();
 651         wxDebugContext::PrintStatistics();
 652     }
 653 #endif // Debug
 654
 655 #if wxUSE_LOG
 656     // do this as the very last thing because everything else can log messages
 657     wxLog::DontCreateOnDemand();
 658
 659     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 660     if (oldLog)
 661         delete oldLog;
 662 #endif // wxUSE_LOG
 663 }
 664
 665 //-----------------------------------------------------------------------------
 666 // Access to the root window global
 667 //-----------------------------------------------------------------------------
 668
 669 GtkWidget* wxGetRootWindow()
 670 {
 671     if (gs_RootWindow == NULL) {
 672         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 673         gtk_widget_realize( gs_RootWindow );
 674     }
 675     return gs_RootWindow;
 676 }
 677
 678 //-----------------------------------------------------------------------------
 679 // wxEntry
 680 //-----------------------------------------------------------------------------
 681
 682
 683 int wxEntryStart( int argc, char *argv[] )
 684 {
 685 #if wxUSE_THREADS
 686     /* GTK 1.2 up to version 1.2.3 has broken threads */
 687    if ((gtk_major_version == 1) &&
 688         (gtk_minor_version == 2) &&
 689         (gtk_micro_version < 4))
 690     {
 691         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 692     }
 693     else
 694     {
 695         g_thread_init(NULL);
 696     }
 697 #endif
 698
 699     gtk_set_locale();
 700
 701     // We should have the wxUSE_WCHAR_T test on the _outside_
 702 #if wxUSE_WCHAR_T
 703 #if defined(__WXGTK20__)
 704     // gtk+ 2.0 supports Unicode through UTF-8 strings
 705     wxConvCurrent = &wxConvUTF8;
 706 #else
 707     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 708 #endif
 709 #else
 710     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 711 #endif
 712
 713     gdk_threads_enter();
 714
 715     gtk_init( &argc, &argv );
 716
 717     wxSetDetectableAutoRepeat( TRUE );
 718
 719     if (!wxApp::Initialize())
 720     {
 721         gdk_threads_leave();
 722         return -1;
 723     }
 724
 725     return 0;
 726 }
 727
 728
 729 int wxEntryInitGui()
 730 {
 731     int retValue = 0;
 732
 733     if ( !wxTheApp->OnInitGui() )
 734         retValue = -1;
 735
 736     wxGetRootWindow();
 737
 738     return retValue;
 739 }
 740
 741
 742 void wxEntryCleanup()
 743 {
 744 #if wxUSE_LOG
 745     // flush the logged messages if any
 746     wxLog *log = wxLog::GetActiveTarget();
 747     if (log != NULL && log->HasPendingMessages())
 748         log->Flush();
 749
 750     // continuing to use user defined log target is unsafe from now on because
 751     // some resources may be already unavailable, so replace it by something
 752     // more safe
 753     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 754     if ( oldlog )
 755         delete oldlog;
 756 #endif // wxUSE_LOG
 757
 758     wxApp::CleanUp();
 759
 760     gdk_threads_leave();
 761 }
 762
 763
 764
 765 int wxEntry( int argc, char *argv[] )
 766 {
 767 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 768     // This seems to be necessary since there are 'rogue'
 769     // objects present at this point (perhaps global objects?)
 770     // Setting a checkpoint will ignore them as far as the
 771     // memory checking facility is concerned.
 772     // Of course you may argue that memory allocated in globals should be
 773     // checked, but this is a reasonable compromise.
 774     wxDebugContext::SetCheckpoint();
 775 #endif
 776     int err = wxEntryStart(argc, argv);
 777     if (err)
 778         return err;
 779
 780     if (!wxTheApp)
 781     {
 782         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 783                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 784
 785         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 786
 787         wxObject *test_app = app_ini();
 788
 789         wxTheApp = (wxApp*) test_app;
 790     }
 791
 792     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 793
 794     wxTheApp->argc = argc;
 795 #if wxUSE_UNICODE
 796     wxTheApp->argv = new wxChar*[argc+1];
 797     int mb_argc = 0;
 798     while (mb_argc < argc)
 799     {
 800         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 801         mb_argc++;
 802     }
 803     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 804 #else
 805     wxTheApp->argv = argv;
 806 #endif
 807
 808     wxString name(wxFileNameFromPath(argv[0]));
 809     wxStripExtension( name );
 810     wxTheApp->SetAppName( name );
 811
 812     int retValue;
 813     retValue = wxEntryInitGui();
 814
 815     // Here frames insert themselves automatically into wxTopLevelWindows by
 816     // getting created in OnInit().
 817     if ( retValue == 0 )
 818     {
 819         if ( !wxTheApp->OnInit() )
 820             retValue = -1;
 821     }
 822
 823     if ( retValue == 0 )
 824     {
 825         /* delete pending toplevel windows (typically a single
 826            dialog) so that, if there isn't any left, we don't
 827            call OnRun() */
 828         wxTheApp->DeletePendingObjects();
 829
 830         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 831
 832         if (wxTheApp->Initialized())
 833         {
 834             wxTheApp->OnRun();
 835
 836             wxWindow *topWindow = wxTheApp->GetTopWindow();
 837             if (topWindow)
 838             {
 839                 /* Forcibly delete the window. */
 840                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 841                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 842                 {
 843                     topWindow->Close( TRUE );
 844                     wxTheApp->DeletePendingObjects();
 845                 }
 846                 else
 847                 {
 848                     delete topWindow;
 849                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 850                 }
 851             }
 852
 853             retValue = wxTheApp->OnExit();
 854         }
 855     }
 856
 857     wxEntryCleanup();
 858
 859     return retValue;
 860 }
 861
 862 #include "wx/gtk/info.xpm"
 863 #include "wx/gtk/error.xpm"
 864 #include "wx/gtk/question.xpm"
 865 #include "wx/gtk/warning.xpm"
 866
 867 wxIcon
 868 wxApp::GetStdIcon(int which) const
 869 {
 870     switch(which)
 871     {
 872         case wxICON_INFORMATION:
 873             return wxIcon(info_xpm);
 874
 875         case wxICON_QUESTION:
 876             return wxIcon(question_xpm);
 877
 878         case wxICON_EXCLAMATION:
 879             return wxIcon(warning_xpm);
 880
 881         default:
 882             wxFAIL_MSG(wxT("requested non existent standard icon"));
 883             // still fall through
 884
 885         case wxICON_HAND:
 886             return wxIcon(error_xpm);
 887     }
 888 }
 889
 890 #ifdef __WXDEBUG__
 891
 892 void wxApp::OnAssert(const wxChar *file, int line, const wxChar *msg)
 893 {
 894     m_isInAssert = TRUE;
 895
 896     wxAppBase::OnAssert(file, line, msg);
 897
 898     m_isInAssert = FALSE;
 899 }
 900
 901 #endif // __WXDEBUG__
 902