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 #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 bool wxApp::Yield(bool onlyIfNeeded)
  87 {
  88     // MT-FIXME
  89     static bool s_inYield = FALSE;
  90
  91     if ( s_inYield )
  92     {
  93         if ( !onlyIfNeeded )
  94         {
  95             wxFAIL_MSG( wxT("wxYield called recursively" ) );
  96         }
  97
  98         return FALSE;
  99     }
 100
 101 #if wxUSE_THREADS
 102     if ( !wxThread::IsMain() )
 103     {
 104         // can't call gtk_main_iteration() from other threads like this
 105         return TRUE;
 106     }
 107 #endif // wxUSE_THREADS
 108
 109     s_inYield = TRUE;
 110
 111     if (!g_isIdle)
 112     {
 113         // We need to remove idle callbacks or the loop will
 114         // never finish.
 115         gtk_idle_remove( m_idleTag );
 116         m_idleTag = 0;
 117         g_isIdle = TRUE;
 118     }
 119
 120     // disable log flushing from here because a call to wxYield() shouldn't
 121     // normally result in message boxes popping up &c
 122     wxLog::Suspend();
 123
 124     while (gtk_events_pending())
 125         gtk_main_iteration();
 126
 127     /* it's necessary to call ProcessIdle() to update the frames sizes which
 128        might have been changed (it also will update other things set from
 129        OnUpdateUI() which is a nice (and desired) side effect) */
 130     while ( ProcessIdle() )
 131     {
 132     }
 133
 134     // let the logs be flashed again
 135     wxLog::Resume();
 136
 137     s_inYield = FALSE;
 138
 139     return TRUE;
 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 #if wxUSE_INTL
 584     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 585 #endif
 586
 587     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 588     // create a module for that as it's part of the core.
 589 #if wxUSE_THREADS
 590     wxPendingEvents = new wxList();
 591     wxPendingEventsLocker = new wxCriticalSection();
 592 #endif
 593
 594     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 595     wxTheColourDatabase->Initialize();
 596
 597     wxInitializeStockLists();
 598     wxInitializeStockObjects();
 599
 600 #if wxUSE_WX_RESOURCES
 601     wxInitializeResourceSystem();
 602 #endif
 603
 604     wxModule::RegisterModules();
 605     if (!wxModule::InitializeModules()) return FALSE;
 606
 607     return TRUE;
 608 }
 609
 610 void wxApp::CleanUp()
 611 {
 612     wxModule::CleanUpModules();
 613
 614 #if wxUSE_WX_RESOURCES
 615     wxCleanUpResourceSystem();
 616 #endif
 617
 618     if (wxTheColourDatabase)
 619         delete wxTheColourDatabase;
 620
 621     wxTheColourDatabase = (wxColourDatabase*) NULL;
 622
 623     wxDeleteStockObjects();
 624
 625     wxDeleteStockLists();
 626
 627     delete wxTheApp;
 628     wxTheApp = (wxApp*) NULL;
 629
 630     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 631     // create a module for that as it's part of the core.
 632 #if wxUSE_THREADS
 633     delete wxPendingEvents;
 634     delete wxPendingEventsLocker;
 635 #endif
 636
 637     delete[] wxBuffer;
 638
 639     wxClassInfo::CleanUpClasses();
 640
 641     // check for memory leaks
 642 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 643     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 644     {
 645         wxLogDebug(wxT("There were memory leaks.\n"));
 646         wxDebugContext::Dump();
 647         wxDebugContext::PrintStatistics();
 648     }
 649 #endif // Debug
 650
 651 #if wxUSE_LOG
 652     // do this as the very last thing because everything else can log messages
 653     wxLog::DontCreateOnDemand();
 654
 655     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 656     if (oldLog)
 657         delete oldLog;
 658 #endif // wxUSE_LOG
 659 }
 660
 661 //-----------------------------------------------------------------------------
 662 // Access to the root window global
 663 //-----------------------------------------------------------------------------
 664
 665 GtkWidget* wxGetRootWindow()
 666 {
 667     if (gs_RootWindow == NULL) {
 668         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 669         gtk_widget_realize( gs_RootWindow );
 670     }
 671     return gs_RootWindow;
 672 }
 673
 674 //-----------------------------------------------------------------------------
 675 // wxEntry
 676 //-----------------------------------------------------------------------------
 677
 678 // NB: argc and argv may be changed here, pass by reference!
 679 int wxEntryStart( int& argc, char *argv[] )
 680 {
 681 #if wxUSE_THREADS
 682     /* GTK 1.2 up to version 1.2.3 has broken threads */
 683    if ((gtk_major_version == 1) &&
 684         (gtk_minor_version == 2) &&
 685         (gtk_micro_version < 4))
 686     {
 687         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 688     }
 689     else
 690     {
 691         g_thread_init(NULL);
 692     }
 693 #endif
 694
 695     gtk_set_locale();
 696
 697     // We should have the wxUSE_WCHAR_T test on the _outside_
 698 #if wxUSE_WCHAR_T
 699 #if defined(__WXGTK20__)
 700     // gtk+ 2.0 supports Unicode through UTF-8 strings
 701     wxConvCurrent = &wxConvUTF8;
 702 #else
 703     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 704 #endif
 705 #else
 706     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 707 #endif
 708
 709     gdk_threads_enter();
 710
 711     gtk_init( &argc, &argv );
 712
 713     wxSetDetectableAutoRepeat( TRUE );
 714
 715     if (!wxApp::Initialize())
 716     {
 717         gdk_threads_leave();
 718         return -1;
 719     }
 720
 721     return 0;
 722 }
 723
 724
 725 int wxEntryInitGui()
 726 {
 727     int retValue = 0;
 728
 729     if ( !wxTheApp->OnInitGui() )
 730         retValue = -1;
 731
 732     wxGetRootWindow();
 733
 734     return retValue;
 735 }
 736
 737
 738 void wxEntryCleanup()
 739 {
 740 #if wxUSE_LOG
 741     // flush the logged messages if any
 742     wxLog *log = wxLog::GetActiveTarget();
 743     if (log != NULL && log->HasPendingMessages())
 744         log->Flush();
 745
 746     // continuing to use user defined log target is unsafe from now on because
 747     // some resources may be already unavailable, so replace it by something
 748     // more safe
 749     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 750     if ( oldlog )
 751         delete oldlog;
 752 #endif // wxUSE_LOG
 753
 754     wxApp::CleanUp();
 755
 756     gdk_threads_leave();
 757 }
 758
 759
 760
 761 int wxEntry( int argc, char *argv[] )
 762 {
 763 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 764     // This seems to be necessary since there are 'rogue'
 765     // objects present at this point (perhaps global objects?)
 766     // Setting a checkpoint will ignore them as far as the
 767     // memory checking facility is concerned.
 768     // Of course you may argue that memory allocated in globals should be
 769     // checked, but this is a reasonable compromise.
 770     wxDebugContext::SetCheckpoint();
 771 #endif
 772     int err = wxEntryStart(argc, argv);
 773     if (err)
 774         return err;
 775
 776     if (!wxTheApp)
 777     {
 778         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 779                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 780
 781         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 782
 783         wxObject *test_app = app_ini();
 784
 785         wxTheApp = (wxApp*) test_app;
 786     }
 787
 788     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 789
 790     wxTheApp->argc = argc;
 791 #if wxUSE_UNICODE
 792     wxTheApp->argv = new wxChar*[argc+1];
 793     int mb_argc = 0;
 794     while (mb_argc < argc)
 795     {
 796         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 797         mb_argc++;
 798     }
 799     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 800 #else
 801     wxTheApp->argv = argv;
 802 #endif
 803
 804     wxString name(wxFileNameFromPath(argv[0]));
 805     wxStripExtension( name );
 806     wxTheApp->SetAppName( name );
 807
 808     int retValue;
 809     retValue = wxEntryInitGui();
 810
 811     // Here frames insert themselves automatically into wxTopLevelWindows by
 812     // getting created in OnInit().
 813     if ( retValue == 0 )
 814     {
 815         if ( !wxTheApp->OnInit() )
 816             retValue = -1;
 817     }
 818
 819     if ( retValue == 0 )
 820     {
 821         /* delete pending toplevel windows (typically a single
 822            dialog) so that, if there isn't any left, we don't
 823            call OnRun() */
 824         wxTheApp->DeletePendingObjects();
 825
 826         wxTheApp->m_initialized = wxTopLevelWindows.GetCount() != 0;
 827
 828         if (wxTheApp->Initialized())
 829         {
 830             wxTheApp->OnRun();
 831
 832             wxWindow *topWindow = wxTheApp->GetTopWindow();
 833             if (topWindow)
 834             {
 835                 /* Forcibly delete the window. */
 836                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 837                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 838                 {
 839                     topWindow->Close( TRUE );
 840                     wxTheApp->DeletePendingObjects();
 841                 }
 842                 else
 843                 {
 844                     delete topWindow;
 845                     wxTheApp->SetTopWindow( (wxWindow*) NULL );
 846                 }
 847             }
 848
 849             retValue = wxTheApp->OnExit();
 850         }
 851     }
 852
 853     wxEntryCleanup();
 854
 855     return retValue;
 856 }
 857
 858 #ifndef __WXUNIVERSAL__
 859
 860 #include "wx/gtk/info.xpm"
 861 #include "wx/gtk/error.xpm"
 862 #include "wx/gtk/question.xpm"
 863 #include "wx/gtk/warning.xpm"
 864
 865 wxIcon wxApp::GetStdIcon(int which) const
 866 {
 867     switch(which)
 868     {
 869         case wxICON_INFORMATION:
 870             return wxIcon(info_xpm);
 871
 872         case wxICON_QUESTION:
 873             return wxIcon(question_xpm);
 874
 875         case wxICON_EXCLAMATION:
 876             return wxIcon(warning_xpm);
 877
 878         default:
 879             wxFAIL_MSG(wxT("requested non existent standard icon"));
 880             // still fall through
 881
 882         case wxICON_HAND:
 883             return wxIcon(error_xpm);
 884     }
 885 }
 886 #else
 887 wxIcon wxApp::GetStdIcon(int which) const
 888 {
 889     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 890 }
 891 #endif // !__WXUNIVERSAL__
 892
 893
 894 #ifdef __WXDEBUG__
 895
 896 void wxApp::OnAssert(const wxChar *file, int line, const wxChar *msg)
 897 {
 898     m_isInAssert = TRUE;
 899
 900     wxAppBase::OnAssert(file, line, msg);
 901
 902     m_isInAssert = FALSE;
 903 }
 904
 905 #endif // __WXDEBUG__
 906