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 #ifdef __VMS
  15 #include <vms_jackets.h>
  16 #endif
  17
  18 #include "wx/app.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/utils.h"
  21 #include "wx/intl.h"
  22 #include "wx/log.h"
  23 #include "wx/memory.h"
  24 #include "wx/font.h"
  25 #include "wx/settings.h"
  26 #include "wx/dialog.h"
  27 #include "wx/msgdlg.h"
  28 #include "wx/file.h"
  29 #include "wx/filename.h"
  30
  31 #if wxUSE_WX_RESOURCES
  32     #include "wx/resource.h"
  33 #endif
  34
  35 #include "wx/module.h"
  36 #include "wx/image.h"
  37
  38 #ifdef __WXUNIVERSAL__
  39     #include "wx/univ/theme.h"
  40     #include "wx/univ/renderer.h"
  41 #endif
  42
  43 #if wxUSE_THREADS
  44     #include "wx/thread.h"
  45 #endif
  46
  47 #include <unistd.h>
  48
  49 #ifdef HAVE_POLL
  50     #if defined(__VMS)
  51         #include <poll.h>
  52     #else
  53         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  54         // in neither poll.h nor sys/poll.h which results in link errors later
  55         #ifdef __OPENBSD__
  56             extern "C"
  57             {
  58         #endif
  59
  60         #include <sys/poll.h>
  61
  62         #ifdef __OPENBSD__
  63             };
  64         #endif
  65     #endif // platform
  66 #else // !HAVE_POLL
  67     // we implement poll() ourselves using select() which is supposed exist in
  68     // all modern Unices
  69     #include <sys/types.h>
  70     #include <sys/time.h>
  71     #include <unistd.h>
  72 #endif // HAVE_POLL/!HAVE_POLL
  73
  74 #include "wx/gtk/win_gtk.h"
  75
  76 #include <gtk/gtk.h>
  77
  78
  79 //-----------------------------------------------------------------------------
  80 // global data
  81 //-----------------------------------------------------------------------------
  82
  83 wxApp *wxTheApp = (wxApp *)  NULL;
  84 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  85
  86 bool   g_mainThreadLocked = FALSE;
  87 gint   g_pendingTag = 0;
  88
  89 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  90
  91 //-----------------------------------------------------------------------------
  92 // idle system
  93 //-----------------------------------------------------------------------------
  94
  95 extern bool g_isIdle;
  96
  97 void wxapp_install_idle_handler();
  98
  99 //-----------------------------------------------------------------------------
 100 // wxExit
 101 //-----------------------------------------------------------------------------
 102
 103 void wxExit()
 104 {
 105     gtk_main_quit();
 106 }
 107
 108 //-----------------------------------------------------------------------------
 109 // wxYield
 110 //-----------------------------------------------------------------------------
 111
 112 // not static because used by textctrl.cpp
 113 //
 114 // MT-FIXME
 115 bool wxIsInsideYield = FALSE;
 116
 117 bool wxApp::Yield(bool onlyIfNeeded)
 118 {
 119     if ( wxIsInsideYield )
 120     {
 121         if ( !onlyIfNeeded )
 122         {
 123             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 124         }
 125
 126         return FALSE;
 127     }
 128
 129 #if wxUSE_THREADS
 130     if ( !wxThread::IsMain() )
 131     {
 132         // can't call gtk_main_iteration() from other threads like this
 133         return TRUE;
 134     }
 135 #endif // wxUSE_THREADS
 136
 137     wxIsInsideYield = TRUE;
 138
 139     if (!g_isIdle)
 140     {
 141         // We need to remove idle callbacks or the loop will
 142         // never finish.
 143         gtk_idle_remove( m_idleTag );
 144         m_idleTag = 0;
 145         g_isIdle = TRUE;
 146     }
 147
 148     // disable log flushing from here because a call to wxYield() shouldn't
 149     // normally result in message boxes popping up &c
 150     wxLog::Suspend();
 151
 152     while (gtk_events_pending())
 153         gtk_main_iteration();
 154
 155     // It's necessary to call ProcessIdle() to update the frames sizes which
 156     // might have been changed (it also will update other things set from
 157     // OnUpdateUI() which is a nice (and desired) side effect). But we
 158     // call ProcessIdle() only once since this is not meant for longish
 159     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 160     // return value of Processidle().
 161     ProcessIdle();
 162
 163     // let the logs be flashed again
 164     wxLog::Resume();
 165
 166     wxIsInsideYield = FALSE;
 167
 168     return TRUE;
 169 }
 170
 171 //-----------------------------------------------------------------------------
 172 // wxWakeUpIdle
 173 //-----------------------------------------------------------------------------
 174
 175 void wxWakeUpIdle()
 176 {
 177 #if wxUSE_THREADS
 178     if (!wxThread::IsMain())
 179         wxMutexGuiEnter();
 180 #endif
 181
 182     if (g_isIdle)
 183         wxapp_install_idle_handler();
 184
 185 #if wxUSE_THREADS
 186     if (!wxThread::IsMain())
 187         wxMutexGuiLeave();
 188 #endif
 189 }
 190
 191 //-----------------------------------------------------------------------------
 192 // local functions
 193 //-----------------------------------------------------------------------------
 194
 195 // the callback functions must be extern "C" to comply with GTK+ declarations
 196 extern "C"
 197 {
 198
 199 static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 200 {
 201     if (!wxTheApp) return TRUE;
 202
 203     // When getting called from GDK's time-out handler
 204     // we are no longer within GDK's grab on the GUI
 205     // thread so we must lock it here ourselves.
 206     gdk_threads_enter();
 207
 208     // Sent idle event to all who request them.
 209     wxTheApp->ProcessPendingEvents();
 210
 211     g_pendingTag = 0;
 212
 213     // Flush the logged messages if any.
 214 #if wxUSE_LOG
 215     wxLog::FlushActive();
 216 #endif // wxUSE_LOG
 217
 218     // Release lock again
 219     gdk_threads_leave();
 220
 221     // Return FALSE to indicate that no more idle events are
 222     // to be sent (single shot instead of continuous stream)
 223     return FALSE;
 224 }
 225
 226 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 227 {
 228     if (!wxTheApp)
 229         return TRUE;
 230
 231 #ifdef __WXDEBUG__
 232     // don't generate the idle events while the assert modal dialog is shown,
 233     // this completely confuses the apps which don't expect to be reentered
 234     // from some safely-looking functions
 235     if ( wxTheApp->IsInAssert() )
 236     {
 237         // But repaint the assertion message if necessary
 238         if (wxTopLevelWindows.GetCount() > 0)
 239         {
 240             wxWindow* win = (wxWindow*) wxTopLevelWindows.Last()->Data();
 241             if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
 242                 win->OnInternalIdle();
 243         }
 244         return TRUE;
 245     }
 246 #endif // __WXDEBUG__
 247
 248     // When getting called from GDK's time-out handler
 249     // we are no longer within GDK's grab on the GUI
 250     // thread so we must lock it here ourselves.
 251     gdk_threads_enter();
 252
 253     // Indicate that we are now in idle mode and event handlers
 254     // will have to reinstall the idle handler again.
 255     g_isIdle = TRUE;
 256     wxTheApp->m_idleTag = 0;
 257
 258     // Send idle event to all who request them as long as
 259     // no events have popped up in the event queue.
 260     while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
 261         ;
 262
 263     // Release lock again
 264     gdk_threads_leave();
 265
 266     // Return FALSE to indicate that no more idle events are
 267     // to be sent (single shot instead of continuous stream).
 268     return FALSE;
 269 }
 270
 271 #if wxUSE_THREADS
 272
 273 #ifdef HAVE_POLL
 274     #define wxPoll poll
 275     #define wxPollFd pollfd
 276 #else // !HAVE_POLL
 277
 278 typedef GPollFD wxPollFd;
 279
 280 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 281 {
 282     // convert timeout from ms to struct timeval (s/us)
 283     timeval tv_timeout;
 284     tv_timeout.tv_sec = timeout/1000;
 285     tv_timeout.tv_usec = (timeout%1000)*1000;
 286
 287     // remember the highest fd used here
 288     int fdMax = -1;
 289
 290     // and fill the sets for select()
 291     fd_set readfds;
 292     fd_set writefds;
 293     fd_set exceptfds;
 294     FD_ZERO(&readfds);
 295     FD_ZERO(&writefds);
 296     FD_ZERO(&exceptfds);
 297
 298     unsigned int i;
 299     for ( i = 0; i < nfds; i++ )
 300     {
 301         wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
 302
 303         if ( ufds[i].events & G_IO_IN )
 304             FD_SET(ufds[i].fd, &readfds);
 305
 306         if ( ufds[i].events & G_IO_PRI )
 307             FD_SET(ufds[i].fd, &exceptfds);
 308
 309         if ( ufds[i].events & G_IO_OUT )
 310             FD_SET(ufds[i].fd, &writefds);
 311
 312         if ( ufds[i].fd > fdMax )
 313             fdMax = ufds[i].fd;
 314     }
 315
 316     fdMax++;
 317     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 318
 319     // translate the results back
 320     for ( i = 0; i < nfds; i++ )
 321     {
 322         ufds[i].revents = 0;
 323
 324         if ( FD_ISSET(ufds[i].fd, &readfds ) )
 325             ufds[i].revents |= G_IO_IN;
 326
 327         if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
 328             ufds[i].revents |= G_IO_PRI;
 329
 330         if ( FD_ISSET(ufds[i].fd, &writefds ) )
 331             ufds[i].revents |= G_IO_OUT;
 332     }
 333
 334     return res;
 335 }
 336
 337 #endif // HAVE_POLL/!HAVE_POLL
 338
 339 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 340 {
 341     gdk_threads_enter();
 342
 343     wxMutexGuiLeave();
 344     g_mainThreadLocked = TRUE;
 345
 346     // we rely on the fact that glib GPollFD struct is really just pollfd but
 347     // I wonder how wise is this in the long term (VZ)
 348     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 349
 350     wxMutexGuiEnter();
 351     g_mainThreadLocked = FALSE;
 352
 353     gdk_threads_leave();
 354
 355     return res;
 356 }
 357
 358 #endif // wxUSE_THREADS
 359
 360 } // extern "C"
 361
 362 void wxapp_install_idle_handler()
 363 {
 364     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 365
 366     g_isIdle = FALSE;
 367
 368     if (g_pendingTag == 0)
 369         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 370
 371     // This routine gets called by all event handlers
 372     // indicating that the idle is over. It may also
 373     // get called from other thread for sending events
 374     // to the main thread (and processing these in
 375     // idle time). Very low priority.
 376     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 377 }
 378
 379 //-----------------------------------------------------------------------------
 380 // Access to the root window global
 381 //-----------------------------------------------------------------------------
 382
 383 GtkWidget* wxGetRootWindow()
 384 {
 385     if (gs_RootWindow == NULL)
 386     {
 387         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 388         gtk_widget_realize( gs_RootWindow );
 389     }
 390     return gs_RootWindow;
 391 }
 392
 393 //-----------------------------------------------------------------------------
 394 // wxApp
 395 //-----------------------------------------------------------------------------
 396
 397 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 398
 399 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 400     EVT_IDLE(wxApp::OnIdle)
 401 END_EVENT_TABLE()
 402
 403 wxApp::wxApp()
 404 {
 405     m_initialized = FALSE;
 406 #ifdef __WXDEBUG__
 407     m_isInAssert = FALSE;
 408 #endif // __WXDEBUG__
 409
 410     m_idleTag = 0;
 411     wxapp_install_idle_handler();
 412
 413 #if wxUSE_THREADS
 414     g_main_set_poll_func( wxapp_poll_func );
 415 #endif
 416
 417     m_colorCube = (unsigned char*) NULL;
 418
 419     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 420     m_glVisualInfo = (void *) NULL;
 421 }
 422
 423 wxApp::~wxApp()
 424 {
 425     if (m_idleTag) gtk_idle_remove( m_idleTag );
 426
 427     if (m_colorCube) free(m_colorCube);
 428 }
 429
 430 bool wxApp::OnInitGui()
 431 {
 432     if ( !wxAppBase::OnInitGui() )
 433         return FALSE;
 434
 435     GdkVisual *visual = gdk_visual_get_system();
 436
 437     // if this is a wxGLApp (derived from wxApp), and we've already
 438     // chosen a specific visual, then derive the GdkVisual from that
 439     if (m_glVisualInfo != NULL)
 440     {
 441 #ifdef __WXGTK20__
 442         // seems gtk_widget_set_default_visual no longer exists?
 443         GdkVisual* vis = gtk_widget_get_default_visual();
 444 #else
 445         GdkVisual* vis = gdkx_visual_get(
 446             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 447         gtk_widget_set_default_visual( vis );
 448 #endif
 449
 450         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 451         gtk_widget_set_default_colormap( colormap );
 452
 453         visual = vis;
 454     }
 455
 456     // On some machines, the default visual is just 256 colours, so
 457     // we make sure we get the best. This can sometimes be wasteful.
 458
 459     else
 460     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 461     {
 462 #ifdef __WXGTK20__
 463         /* seems gtk_widget_set_default_visual no longer exists? */
 464         GdkVisual* vis = gtk_widget_get_default_visual();
 465 #else
 466         GdkVisual* vis = gdk_visual_get_best();
 467         gtk_widget_set_default_visual( vis );
 468 #endif
 469
 470         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 471         gtk_widget_set_default_colormap( colormap );
 472
 473         visual = vis;
 474     }
 475
 476     // Nothing to do for 15, 16, 24, 32 bit displays
 477     if (visual->depth > 8) return TRUE;
 478
 479     // initialize color cube for 8-bit color reduction dithering
 480
 481     GdkColormap *cmap = gtk_widget_get_default_colormap();
 482
 483     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 484
 485     for (int r = 0; r < 32; r++)
 486     {
 487         for (int g = 0; g < 32; g++)
 488         {
 489             for (int b = 0; b < 32; b++)
 490             {
 491                 int rr = (r << 3) | (r >> 2);
 492                 int gg = (g << 3) | (g >> 2);
 493                 int bb = (b << 3) | (b >> 2);
 494
 495                 int index = -1;
 496
 497                 GdkColor *colors = cmap->colors;
 498                 if (colors)
 499                 {
 500                     int max = 3 * 65536;
 501
 502                     for (int i = 0; i < cmap->size; i++)
 503                     {
 504                         int rdiff = ((rr << 8) - colors[i].red);
 505                         int gdiff = ((gg << 8) - colors[i].green);
 506                         int bdiff = ((bb << 8) - colors[i].blue);
 507                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 508                         if (sum < max)
 509                         {
 510                             index = i; max = sum;
 511                         }
 512                     }
 513                 }
 514                 else
 515                 {
 516                     // assume 8-bit true or static colors. this really exists
 517                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 518                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 519                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 520                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 521                 }
 522                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 523             }
 524         }
 525     }
 526
 527     return TRUE;
 528 }
 529
 530 GdkVisual *wxApp::GetGdkVisual()
 531 {
 532     GdkVisual *visual = NULL;
 533
 534     if (m_glVisualInfo)
 535         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 536     else
 537         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 538
 539     wxASSERT( visual );
 540
 541     return visual;
 542 }
 543
 544 bool wxApp::ProcessIdle()
 545 {
 546     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 547     node = wxTopLevelWindows.GetFirst();
 548     while (node)
 549     {
 550         wxWindow* win = node->GetData();
 551         CallInternalIdle( win );
 552
 553         node = node->GetNext();
 554     }
 555
 556     wxIdleEvent event;
 557     event.SetEventObject( this );
 558     ProcessEvent( event );
 559
 560     return event.MoreRequested();
 561 }
 562
 563 void wxApp::OnIdle( wxIdleEvent &event )
 564 {
 565     static bool s_inOnIdle = FALSE;
 566
 567     // Avoid recursion (via ProcessEvent default case)
 568     if (s_inOnIdle)
 569         return;
 570
 571     s_inOnIdle = TRUE;
 572
 573     // Resend in the main thread events which have been prepared in other
 574     // threads
 575     ProcessPendingEvents();
 576
 577     // 'Garbage' collection of windows deleted with Close()
 578     DeletePendingObjects();
 579
 580     // Send OnIdle events to all windows
 581     bool needMore = SendIdleEvents();
 582
 583     if (needMore)
 584         event.RequestMore(TRUE);
 585
 586     s_inOnIdle = FALSE;
 587 }
 588
 589 bool wxApp::SendIdleEvents()
 590 {
 591     bool needMore = FALSE;
 592
 593     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 594     while (node)
 595     {
 596         wxWindow* win = node->GetData();
 597         if (SendIdleEvents(win))
 598             needMore = TRUE;
 599
 600         node = node->GetNext();
 601     }
 602
 603     return needMore;
 604 }
 605
 606 bool wxApp::CallInternalIdle( wxWindow* win )
 607 {
 608     win->OnInternalIdle();
 609
 610     wxNode* node = win->GetChildren().First();
 611     while (node)
 612     {
 613         wxWindow* win = (wxWindow*) node->Data();
 614         CallInternalIdle( win );
 615
 616         node = node->Next();
 617     }
 618
 619     return TRUE;
 620 }
 621
 622 bool wxApp::SendIdleEvents( wxWindow* win )
 623 {
 624     bool needMore = FALSE;
 625
 626     wxIdleEvent event;
 627     event.SetEventObject(win);
 628
 629     win->GetEventHandler()->ProcessEvent(event);
 630
 631     if (event.MoreRequested())
 632         needMore = TRUE;
 633
 634     wxNode* node = win->GetChildren().First();
 635     while (node)
 636     {
 637         wxWindow* win = (wxWindow*) node->Data();
 638         if (SendIdleEvents(win))
 639             needMore = TRUE;
 640
 641         node = node->Next();
 642     }
 643
 644     return needMore;
 645 }
 646
 647 int wxApp::MainLoop()
 648 {
 649     gtk_main();
 650     return 0;
 651 }
 652
 653 void wxApp::ExitMainLoop()
 654 {
 655     if (gtk_main_level() > 0)
 656         gtk_main_quit();
 657 }
 658
 659 bool wxApp::Initialized()
 660 {
 661     return m_initialized;
 662 }
 663
 664 bool wxApp::Pending()
 665 {
 666     return (gtk_events_pending() > 0);
 667 }
 668
 669 void wxApp::Dispatch()
 670 {
 671     gtk_main_iteration();
 672 }
 673
 674 void wxApp::DeletePendingObjects()
 675 {
 676     wxNode *node = wxPendingDelete.First();
 677     while (node)
 678     {
 679         wxObject *obj = (wxObject *)node->Data();
 680
 681         delete obj;
 682
 683         if (wxPendingDelete.Find(obj))
 684             delete node;
 685
 686         node = wxPendingDelete.First();
 687     }
 688 }
 689
 690 bool wxApp::Initialize()
 691 {
 692     wxClassInfo::InitializeClasses();
 693
 694     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 695     // create a module for that as it's part of the core.
 696 #if wxUSE_THREADS
 697     wxPendingEvents = new wxList();
 698     wxPendingEventsLocker = new wxCriticalSection();
 699 #endif
 700
 701     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 702     wxTheColourDatabase->Initialize();
 703
 704     wxInitializeStockLists();
 705     wxInitializeStockObjects();
 706
 707 #if wxUSE_WX_RESOURCES
 708     wxInitializeResourceSystem();
 709 #endif
 710
 711     wxModule::RegisterModules();
 712     if (!wxModule::InitializeModules())
 713         return FALSE;
 714
 715 #if wxUSE_INTL
 716     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 717 #endif
 718
 719     return TRUE;
 720 }
 721
 722 void wxApp::CleanUp()
 723 {
 724     wxModule::CleanUpModules();
 725
 726 #if wxUSE_WX_RESOURCES
 727     wxCleanUpResourceSystem();
 728 #endif
 729
 730     delete wxTheColourDatabase;
 731     wxTheColourDatabase = (wxColourDatabase*) NULL;
 732
 733     wxDeleteStockObjects();
 734
 735     wxDeleteStockLists();
 736
 737     delete wxTheApp;
 738     wxTheApp = (wxApp*) NULL;
 739
 740     wxClassInfo::CleanUpClasses();
 741
 742 #if wxUSE_THREADS
 743     delete wxPendingEvents;
 744     delete wxPendingEventsLocker;
 745 #endif
 746
 747     // check for memory leaks
 748 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 749     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 750     {
 751         wxLogDebug(wxT("There were memory leaks.\n"));
 752         wxDebugContext::Dump();
 753         wxDebugContext::PrintStatistics();
 754     }
 755 #endif // Debug
 756
 757 #if wxUSE_LOG
 758     // do this as the very last thing because everything else can log messages
 759     wxLog::DontCreateOnDemand();
 760
 761     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 762     if (oldLog)
 763         delete oldLog;
 764 #endif // wxUSE_LOG
 765 }
 766
 767 //-----------------------------------------------------------------------------
 768 // wxEntry
 769 //-----------------------------------------------------------------------------
 770
 771 // NB: argc and argv may be changed here, pass by reference!
 772 int wxEntryStart( int& argc, char *argv[] )
 773 {
 774 #if wxUSE_THREADS
 775     // GTK 1.2 up to version 1.2.3 has broken threads
 776     if ((gtk_major_version == 1) &&
 777         (gtk_minor_version == 2) &&
 778         (gtk_micro_version < 4))
 779     {
 780         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 781     }
 782     else
 783     {
 784         g_thread_init(NULL);
 785     }
 786 #endif
 787
 788     gtk_set_locale();
 789
 790     // We should have the wxUSE_WCHAR_T test on the _outside_
 791 #if wxUSE_WCHAR_T
 792 #if defined(__WXGTK20__)
 793     // gtk+ 2.0 supports Unicode through UTF-8 strings
 794     wxConvCurrent = &wxConvUTF8;
 795 #else
 796     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 797 #endif
 798 #else
 799     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 800 #endif
 801
 802     gdk_threads_enter();
 803
 804     gtk_init( &argc, &argv );
 805
 806     wxSetDetectableAutoRepeat( TRUE );
 807
 808     if (!wxApp::Initialize())
 809     {
 810         gdk_threads_leave();
 811         return -1;
 812     }
 813
 814     return 0;
 815 }
 816
 817
 818 int wxEntryInitGui()
 819 {
 820     int retValue = 0;
 821
 822     if ( !wxTheApp->OnInitGui() )
 823         retValue = -1;
 824
 825     wxGetRootWindow();
 826
 827     return retValue;
 828 }
 829
 830
 831 void wxEntryCleanup()
 832 {
 833 #if wxUSE_LOG
 834     // flush the logged messages if any
 835     wxLog *log = wxLog::GetActiveTarget();
 836     if (log != NULL && log->HasPendingMessages())
 837         log->Flush();
 838
 839     // continuing to use user defined log target is unsafe from now on because
 840     // some resources may be already unavailable, so replace it by something
 841     // more safe
 842     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 843     if ( oldlog )
 844         delete oldlog;
 845 #endif // wxUSE_LOG
 846
 847     wxApp::CleanUp();
 848
 849     gdk_threads_leave();
 850 }
 851
 852
 853 int wxEntry( int argc, char *argv[] )
 854 {
 855 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 856     // This seems to be necessary since there are 'rogue'
 857     // objects present at this point (perhaps global objects?)
 858     // Setting a checkpoint will ignore them as far as the
 859     // memory checking facility is concerned.
 860     // Of course you may argue that memory allocated in globals should be
 861     // checked, but this is a reasonable compromise.
 862     wxDebugContext::SetCheckpoint();
 863 #endif
 864     int err = wxEntryStart(argc, argv);
 865     if (err)
 866         return err;
 867
 868     if (!wxTheApp)
 869     {
 870         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 871                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 872
 873         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 874
 875         wxObject *test_app = app_ini();
 876
 877         wxTheApp = (wxApp*) test_app;
 878     }
 879
 880     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 881
 882     wxTheApp->argc = argc;
 883 #if wxUSE_UNICODE
 884     wxTheApp->argv = new wxChar*[argc+1];
 885     int mb_argc = 0;
 886     while (mb_argc < argc)
 887     {
 888         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 889         mb_argc++;
 890     }
 891     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 892 #else
 893     wxTheApp->argv = argv;
 894 #endif
 895
 896     if (wxTheApp->argc > 0)
 897     {
 898         wxFileName fname( wxTheApp->argv[0] );
 899         wxTheApp->SetAppName( fname.GetName() );
 900     }
 901
 902     int retValue;
 903     retValue = wxEntryInitGui();
 904
 905     // Here frames insert themselves automatically into wxTopLevelWindows by
 906     // getting created in OnInit().
 907     if ( retValue == 0 )
 908     {
 909         if ( !wxTheApp->OnInit() )
 910             retValue = -1;
 911     }
 912
 913     if ( retValue == 0 )
 914     {
 915         // Delete pending toplevel windows
 916         wxTheApp->DeletePendingObjects();
 917
 918         // When is the app not initialized ?
 919         wxTheApp->m_initialized = TRUE;
 920
 921         if (wxTheApp->Initialized())
 922         {
 923             wxTheApp->OnRun();
 924
 925             wxWindow *topWindow = wxTheApp->GetTopWindow();
 926
 927             // Delete all pending windows if any
 928             wxTheApp->DeletePendingObjects();
 929
 930             // Reset top window
 931             if (topWindow)
 932                 wxTheApp->SetTopWindow( (wxWindow*) NULL );
 933
 934             retValue = wxTheApp->OnExit();
 935         }
 936     }
 937
 938     wxEntryCleanup();
 939
 940     return retValue;
 941 }
 942
 943 #ifdef __WXDEBUG__
 944
 945 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 946 {
 947     m_isInAssert = TRUE;
 948
 949     wxAppBase::OnAssert(file, line, cond, msg);
 950
 951     m_isInAssert = FALSE;
 952 }
 953
 954 #endif // __WXDEBUG__
 955