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 #undef ConnectionNumber
  17 #endif
  18
  19 #include "wx/app.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/utils.h"
  22 #include "wx/intl.h"
  23 #include "wx/log.h"
  24 #include "wx/memory.h"
  25 #include "wx/font.h"
  26 #include "wx/settings.h"
  27 #include "wx/dialog.h"
  28 #include "wx/msgdlg.h"
  29 #include "wx/file.h"
  30 #include "wx/filename.h"
  31 #include "wx/module.h"
  32 #include "wx/image.h"
  33
  34 #ifdef __WXUNIVERSAL__
  35     #include "wx/univ/theme.h"
  36     #include "wx/univ/renderer.h"
  37 #endif
  38
  39 #if wxUSE_THREADS
  40     #include "wx/thread.h"
  41 #endif
  42
  43 #include <unistd.h>
  44
  45 #ifdef HAVE_POLL
  46     #if defined(__VMS)
  47         #include <poll.h>
  48     #else
  49         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  50         // in neither poll.h nor sys/poll.h which results in link errors later
  51         #ifdef __OPENBSD__
  52             extern "C"
  53             {
  54         #endif
  55
  56         #include <sys/poll.h>
  57
  58         #ifdef __OPENBSD__
  59             };
  60         #endif
  61     #endif // platform
  62 #else // !HAVE_POLL
  63     // we implement poll() ourselves using select() which is supposed exist in
  64     // all modern Unices
  65     #include <sys/types.h>
  66     #include <sys/time.h>
  67     #include <unistd.h>
  68 #endif // HAVE_POLL/!HAVE_POLL
  69
  70 #include "wx/gtk/win_gtk.h"
  71
  72 #include <gtk/gtk.h>
  73
  74
  75 //-----------------------------------------------------------------------------
  76 // global data
  77 //-----------------------------------------------------------------------------
  78
  79 wxApp *wxTheApp = (wxApp *)  NULL;
  80 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  81
  82 bool   g_mainThreadLocked = FALSE;
  83 gint   g_pendingTag = 0;
  84
  85 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  86
  87 //-----------------------------------------------------------------------------
  88 // idle system
  89 //-----------------------------------------------------------------------------
  90
  91 extern bool g_isIdle;
  92
  93 void wxapp_install_idle_handler();
  94
  95 //-----------------------------------------------------------------------------
  96 // wxExit
  97 //-----------------------------------------------------------------------------
  98
  99 void wxExit()
 100 {
 101     gtk_main_quit();
 102 }
 103
 104 //-----------------------------------------------------------------------------
 105 // wxYield
 106 //-----------------------------------------------------------------------------
 107
 108 // not static because used by textctrl.cpp
 109 //
 110 // MT-FIXME
 111 bool wxIsInsideYield = FALSE;
 112
 113 bool wxApp::Yield(bool onlyIfNeeded)
 114 {
 115     if ( wxIsInsideYield )
 116     {
 117         if ( !onlyIfNeeded )
 118         {
 119             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 120         }
 121
 122         return FALSE;
 123     }
 124
 125 #if wxUSE_THREADS
 126     if ( !wxThread::IsMain() )
 127     {
 128         // can't call gtk_main_iteration() from other threads like this
 129         return TRUE;
 130     }
 131 #endif // wxUSE_THREADS
 132
 133     wxIsInsideYield = TRUE;
 134
 135     if (!g_isIdle)
 136     {
 137         // We need to remove idle callbacks or the loop will
 138         // never finish.
 139         gtk_idle_remove( m_idleTag );
 140         m_idleTag = 0;
 141         g_isIdle = TRUE;
 142     }
 143
 144     // disable log flushing from here because a call to wxYield() shouldn't
 145     // normally result in message boxes popping up &c
 146     wxLog::Suspend();
 147
 148     while (gtk_events_pending())
 149         gtk_main_iteration();
 150
 151     // It's necessary to call ProcessIdle() to update the frames sizes which
 152     // might have been changed (it also will update other things set from
 153     // OnUpdateUI() which is a nice (and desired) side effect). But we
 154     // call ProcessIdle() only once since this is not meant for longish
 155     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 156     // return value of Processidle().
 157     ProcessIdle();
 158
 159     // let the logs be flashed again
 160     wxLog::Resume();
 161
 162     wxIsInsideYield = FALSE;
 163
 164     return TRUE;
 165 }
 166
 167 //-----------------------------------------------------------------------------
 168 // wxWakeUpIdle
 169 //-----------------------------------------------------------------------------
 170
 171 static bool gs_WakeUpIdle = false;
 172
 173 void wxWakeUpIdle()
 174 {
 175 #if wxUSE_THREADS
 176     if (!wxThread::IsMain())
 177         wxMutexGuiEnter();
 178 #endif
 179
 180     if (g_isIdle) {
 181         gs_WakeUpIdle = true;
 182         wxapp_install_idle_handler();
 183         gs_WakeUpIdle = false;
 184     }
 185
 186 #if wxUSE_THREADS
 187     if (!wxThread::IsMain())
 188         wxMutexGuiLeave();
 189 #endif
 190 }
 191
 192 //-----------------------------------------------------------------------------
 193 // local functions
 194 //-----------------------------------------------------------------------------
 195
 196 // the callback functions must be extern "C" to comply with GTK+ declarations
 197 extern "C"
 198 {
 199
 200 static gint wxapp_pending_callback( gpointer WXUNUSED(data) )
 201 {
 202     if (!wxTheApp) return TRUE;
 203
 204     // When getting called from GDK's time-out handler
 205     // we are no longer within GDK's grab on the GUI
 206     // thread so we must lock it here ourselves.
 207     gdk_threads_enter();
 208
 209     // Sent idle event to all who request them.
 210     wxTheApp->ProcessPendingEvents();
 211
 212     g_pendingTag = 0;
 213
 214     // Flush the logged messages if any.
 215 #if wxUSE_LOG
 216     wxLog::FlushActive();
 217 #endif // wxUSE_LOG
 218
 219     // Release lock again
 220     gdk_threads_leave();
 221
 222     // Return FALSE to indicate that no more idle events are
 223     // to be sent (single shot instead of continuous stream)
 224     return FALSE;
 225 }
 226
 227 static gint wxapp_idle_callback( gpointer WXUNUSED(data) )
 228 {
 229     if (!wxTheApp)
 230         return TRUE;
 231
 232 #ifdef __WXDEBUG__
 233     // don't generate the idle events while the assert modal dialog is shown,
 234     // this completely confuses the apps which don't expect to be reentered
 235     // from some safely-looking functions
 236     if ( wxTheApp->IsInAssert() )
 237     {
 238         // But repaint the assertion message if necessary
 239         if (wxTopLevelWindows.GetCount() > 0)
 240         {
 241             wxWindow* win = (wxWindow*) wxTopLevelWindows.GetLast()->GetData();
 242 #ifdef __WXGTK20__
 243             if (win->IsKindOf(CLASSINFO(wxMessageDialog)))
 244 #else
 245             if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
 246 #endif
 247                 win->OnInternalIdle();
 248         }
 249         return TRUE;
 250     }
 251 #endif // __WXDEBUG__
 252
 253     // When getting called from GDK's time-out handler
 254     // we are no longer within GDK's grab on the GUI
 255     // thread so we must lock it here ourselves.
 256     gdk_threads_enter();
 257
 258     // Indicate that we are now in idle mode and event handlers
 259     // will have to reinstall the idle handler again.
 260     g_isIdle = TRUE;
 261     wxTheApp->m_idleTag = 0;
 262
 263     // Send idle event to all who request them as long as
 264     // no events have popped up in the event queue.
 265     while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
 266         ;
 267
 268     // Release lock again
 269     gdk_threads_leave();
 270
 271     // Return FALSE to indicate that no more idle events are
 272     // to be sent (single shot instead of continuous stream).
 273     return FALSE;
 274 }
 275
 276 #if wxUSE_THREADS
 277
 278 #ifdef HAVE_POLL
 279     #define wxPoll poll
 280     #define wxPollFd pollfd
 281 #else // !HAVE_POLL
 282
 283 typedef GPollFD wxPollFd;
 284
 285 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 286 {
 287     // convert timeout from ms to struct timeval (s/us)
 288     timeval tv_timeout;
 289     tv_timeout.tv_sec = timeout/1000;
 290     tv_timeout.tv_usec = (timeout%1000)*1000;
 291
 292     // remember the highest fd used here
 293     int fdMax = -1;
 294
 295     // and fill the sets for select()
 296     fd_set readfds;
 297     fd_set writefds;
 298     fd_set exceptfds;
 299     FD_ZERO(&readfds);
 300     FD_ZERO(&writefds);
 301     FD_ZERO(&exceptfds);
 302
 303     unsigned int i;
 304     for ( i = 0; i < nfds; i++ )
 305     {
 306         wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
 307
 308         if ( ufds[i].events & G_IO_IN )
 309             FD_SET(ufds[i].fd, &readfds);
 310
 311         if ( ufds[i].events & G_IO_PRI )
 312             FD_SET(ufds[i].fd, &exceptfds);
 313
 314         if ( ufds[i].events & G_IO_OUT )
 315             FD_SET(ufds[i].fd, &writefds);
 316
 317         if ( ufds[i].fd > fdMax )
 318             fdMax = ufds[i].fd;
 319     }
 320
 321     fdMax++;
 322     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 323
 324     // translate the results back
 325     for ( i = 0; i < nfds; i++ )
 326     {
 327         ufds[i].revents = 0;
 328
 329         if ( FD_ISSET(ufds[i].fd, &readfds ) )
 330             ufds[i].revents |= G_IO_IN;
 331
 332         if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
 333             ufds[i].revents |= G_IO_PRI;
 334
 335         if ( FD_ISSET(ufds[i].fd, &writefds ) )
 336             ufds[i].revents |= G_IO_OUT;
 337     }
 338
 339     return res;
 340 }
 341
 342 #endif // HAVE_POLL/!HAVE_POLL
 343
 344 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 345 {
 346     gdk_threads_enter();
 347
 348     wxMutexGuiLeave();
 349     g_mainThreadLocked = TRUE;
 350
 351     // we rely on the fact that glib GPollFD struct is really just pollfd but
 352     // I wonder how wise is this in the long term (VZ)
 353     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 354
 355     wxMutexGuiEnter();
 356     g_mainThreadLocked = FALSE;
 357
 358     gdk_threads_leave();
 359
 360     return res;
 361 }
 362
 363 #endif // wxUSE_THREADS
 364
 365 } // extern "C"
 366
 367 void wxapp_install_idle_handler()
 368 {
 369     wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 370
 371     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 372
 373     g_isIdle = FALSE;
 374
 375     if (g_pendingTag == 0)
 376         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 377
 378     // This routine gets called by all event handlers
 379     // indicating that the idle is over. It may also
 380     // get called from other thread for sending events
 381     // to the main thread (and processing these in
 382     // idle time). Very low priority.
 383     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 384 }
 385
 386 //-----------------------------------------------------------------------------
 387 // Access to the root window global
 388 //-----------------------------------------------------------------------------
 389
 390 GtkWidget* wxGetRootWindow()
 391 {
 392     if (gs_RootWindow == NULL)
 393     {
 394         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 395         gtk_widget_realize( gs_RootWindow );
 396     }
 397     return gs_RootWindow;
 398 }
 399
 400 //-----------------------------------------------------------------------------
 401 // wxApp
 402 //-----------------------------------------------------------------------------
 403
 404 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 405
 406 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 407     EVT_IDLE(wxApp::OnIdle)
 408 END_EVENT_TABLE()
 409
 410 wxApp::wxApp()
 411 {
 412     m_initialized = FALSE;
 413 #ifdef __WXDEBUG__
 414     m_isInAssert = FALSE;
 415 #endif // __WXDEBUG__
 416
 417     m_idleTag = 0;
 418     wxapp_install_idle_handler();
 419
 420 #if wxUSE_THREADS
 421     g_main_set_poll_func( wxapp_poll_func );
 422 #endif
 423
 424     m_colorCube = (unsigned char*) NULL;
 425
 426     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 427     m_glVisualInfo = (void *) NULL;
 428 }
 429
 430 wxApp::~wxApp()
 431 {
 432     if (m_idleTag) gtk_idle_remove( m_idleTag );
 433
 434     if (m_colorCube) free(m_colorCube);
 435 }
 436
 437 bool wxApp::OnInitGui()
 438 {
 439     if ( !wxAppBase::OnInitGui() )
 440         return FALSE;
 441
 442     GdkVisual *visual = gdk_visual_get_system();
 443
 444     // if this is a wxGLApp (derived from wxApp), and we've already
 445     // chosen a specific visual, then derive the GdkVisual from that
 446     if (m_glVisualInfo != NULL)
 447     {
 448 #ifdef __WXGTK20__
 449         // seems gtk_widget_set_default_visual no longer exists?
 450         GdkVisual* vis = gtk_widget_get_default_visual();
 451 #else
 452         GdkVisual* vis = gdkx_visual_get(
 453             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 454         gtk_widget_set_default_visual( vis );
 455 #endif
 456
 457         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 458         gtk_widget_set_default_colormap( colormap );
 459
 460         visual = vis;
 461     }
 462
 463     // On some machines, the default visual is just 256 colours, so
 464     // we make sure we get the best. This can sometimes be wasteful.
 465
 466     else
 467     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 468     {
 469 #ifdef __WXGTK20__
 470         /* seems gtk_widget_set_default_visual no longer exists? */
 471         GdkVisual* vis = gtk_widget_get_default_visual();
 472 #else
 473         GdkVisual* vis = gdk_visual_get_best();
 474         gtk_widget_set_default_visual( vis );
 475 #endif
 476
 477         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 478         gtk_widget_set_default_colormap( colormap );
 479
 480         visual = vis;
 481     }
 482
 483     // Nothing to do for 15, 16, 24, 32 bit displays
 484     if (visual->depth > 8) return TRUE;
 485
 486     // initialize color cube for 8-bit color reduction dithering
 487
 488     GdkColormap *cmap = gtk_widget_get_default_colormap();
 489
 490     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 491
 492     for (int r = 0; r < 32; r++)
 493     {
 494         for (int g = 0; g < 32; g++)
 495         {
 496             for (int b = 0; b < 32; b++)
 497             {
 498                 int rr = (r << 3) | (r >> 2);
 499                 int gg = (g << 3) | (g >> 2);
 500                 int bb = (b << 3) | (b >> 2);
 501
 502                 int index = -1;
 503
 504                 GdkColor *colors = cmap->colors;
 505                 if (colors)
 506                 {
 507                     int max = 3 * 65536;
 508
 509                     for (int i = 0; i < cmap->size; i++)
 510                     {
 511                         int rdiff = ((rr << 8) - colors[i].red);
 512                         int gdiff = ((gg << 8) - colors[i].green);
 513                         int bdiff = ((bb << 8) - colors[i].blue);
 514                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 515                         if (sum < max)
 516                         {
 517                             index = i; max = sum;
 518                         }
 519                     }
 520                 }
 521                 else
 522                 {
 523                     // assume 8-bit true or static colors. this really exists
 524                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 525                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 526                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 527                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 528                 }
 529                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 530             }
 531         }
 532     }
 533
 534     return TRUE;
 535 }
 536
 537 GdkVisual *wxApp::GetGdkVisual()
 538 {
 539     GdkVisual *visual = NULL;
 540
 541     if (m_glVisualInfo)
 542         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 543     else
 544         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 545
 546     wxASSERT( visual );
 547
 548     return visual;
 549 }
 550
 551 bool wxApp::ProcessIdle()
 552 {
 553     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 554     node = wxTopLevelWindows.GetFirst();
 555     while (node)
 556     {
 557         wxWindow* win = node->GetData();
 558         CallInternalIdle( win );
 559
 560         node = node->GetNext();
 561     }
 562
 563     wxIdleEvent event;
 564     event.SetEventObject( this );
 565     ProcessEvent( event );
 566
 567     return event.MoreRequested();
 568 }
 569
 570 void wxApp::OnIdle( wxIdleEvent &event )
 571 {
 572     static bool s_inOnIdle = FALSE;
 573
 574     // Avoid recursion (via ProcessEvent default case)
 575     if (s_inOnIdle)
 576         return;
 577
 578     s_inOnIdle = TRUE;
 579
 580     // Resend in the main thread events which have been prepared in other
 581     // threads
 582     ProcessPendingEvents();
 583
 584     // 'Garbage' collection of windows deleted with Close()
 585     DeletePendingObjects();
 586
 587     // Send OnIdle events to all windows
 588     bool needMore = SendIdleEvents();
 589
 590     if (needMore)
 591         event.RequestMore(TRUE);
 592
 593     s_inOnIdle = FALSE;
 594 }
 595
 596 bool wxApp::SendIdleEvents()
 597 {
 598     bool needMore = FALSE;
 599
 600     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 601     while (node)
 602     {
 603         wxWindow* win = node->GetData();
 604         if (SendIdleEvents(win))
 605             needMore = TRUE;
 606
 607         node = node->GetNext();
 608     }
 609
 610     return needMore;
 611 }
 612
 613 bool wxApp::CallInternalIdle( wxWindow* win )
 614 {
 615     win->OnInternalIdle();
 616
 617     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 618     while (node)
 619     {
 620         wxWindow    *win = node->GetData();
 621
 622         CallInternalIdle( win );
 623         node = node->GetNext();
 624     }
 625
 626     return TRUE;
 627 }
 628
 629 bool wxApp::SendIdleEvents( wxWindow* win )
 630 {
 631     bool needMore = FALSE;
 632
 633     wxIdleEvent event;
 634     event.SetEventObject(win);
 635
 636     win->GetEventHandler()->ProcessEvent(event);
 637
 638     if (event.MoreRequested())
 639         needMore = TRUE;
 640
 641     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 642     while (node)
 643     {
 644         wxWindow    *win = node->GetData();
 645
 646         if (SendIdleEvents(win))
 647             needMore = TRUE;
 648         node = node->GetNext();
 649     }
 650
 651     return needMore;
 652 }
 653
 654 int wxApp::MainLoop()
 655 {
 656     gtk_main();
 657     return 0;
 658 }
 659
 660 void wxApp::ExitMainLoop()
 661 {
 662     if (gtk_main_level() > 0)
 663         gtk_main_quit();
 664 }
 665
 666 bool wxApp::Initialized()
 667 {
 668     return m_initialized;
 669 }
 670
 671 bool wxApp::Pending()
 672 {
 673     return (gtk_events_pending() > 0);
 674 }
 675
 676 void wxApp::Dispatch()
 677 {
 678     gtk_main_iteration();
 679 }
 680
 681 void wxApp::DeletePendingObjects()
 682 {
 683     wxNode *node = wxPendingDelete.GetFirst();
 684     while (node)
 685     {
 686         wxObject *obj = (wxObject *)node->GetData();
 687
 688         delete obj;
 689
 690         if (wxPendingDelete.Find(obj))
 691             delete node;
 692
 693         node = wxPendingDelete.GetFirst();
 694     }
 695 }
 696
 697 bool wxApp::Initialize()
 698 {
 699     wxClassInfo::InitializeClasses();
 700
 701     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 702     // create a module for that as it's part of the core.
 703 #if wxUSE_THREADS
 704     wxPendingEvents = new wxList();
 705     wxPendingEventsLocker = new wxCriticalSection();
 706 #endif
 707
 708     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 709     wxTheColourDatabase->Initialize();
 710
 711     wxInitializeStockLists();
 712     wxInitializeStockObjects();
 713
 714     wxModule::RegisterModules();
 715     if (!wxModule::InitializeModules())
 716         return FALSE;
 717
 718 #if wxUSE_INTL
 719     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 720 #endif
 721
 722     return TRUE;
 723 }
 724
 725 void wxApp::CleanUp()
 726 {
 727     wxModule::CleanUpModules();
 728
 729     delete wxTheColourDatabase;
 730     wxTheColourDatabase = (wxColourDatabase*) NULL;
 731
 732     wxDeleteStockObjects();
 733
 734     wxDeleteStockLists();
 735
 736     delete wxTheApp;
 737     wxTheApp = (wxApp*) NULL;
 738
 739     wxClassInfo::CleanUpClasses();
 740
 741 #if wxUSE_THREADS
 742     delete wxPendingEvents;
 743     wxPendingEvents = NULL;
 744     delete wxPendingEventsLocker;
 745     wxPendingEventsLocker = NULL;
 746 #endif
 747
 748     // check for memory leaks
 749 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 750     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 751     {
 752         wxLogDebug(wxT("There were memory leaks.\n"));
 753         wxDebugContext::Dump();
 754         wxDebugContext::PrintStatistics();
 755     }
 756 #endif // Debug
 757
 758 #if wxUSE_LOG
 759     // do this as the very last thing because everything else can log messages
 760     wxLog::DontCreateOnDemand();
 761
 762     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 763     if (oldLog)
 764         delete oldLog;
 765 #endif // wxUSE_LOG
 766 }
 767
 768 //-----------------------------------------------------------------------------
 769 // wxEntry
 770 //-----------------------------------------------------------------------------
 771
 772 // NB: argc and argv may be changed here, pass by reference!
 773 int wxEntryStart( int& argc, char *argv[] )
 774 {
 775 #if wxUSE_THREADS
 776     // GTK 1.2 up to version 1.2.3 has broken threads
 777     if ((gtk_major_version == 1) &&
 778         (gtk_minor_version == 2) &&
 779         (gtk_micro_version < 4))
 780     {
 781         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 782     }
 783     else
 784     {
 785         g_thread_init(NULL);
 786     }
 787 #endif
 788
 789     gtk_set_locale();
 790
 791     // We should have the wxUSE_WCHAR_T test on the _outside_
 792 #if wxUSE_WCHAR_T
 793 #if defined(__WXGTK20__)
 794     // gtk+ 2.0 supports Unicode through UTF-8 strings
 795     wxConvCurrent = &wxConvUTF8;
 796 #else
 797     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 798 #endif
 799 #else
 800     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 801 #endif
 802
 803     gdk_threads_enter();
 804
 805     gtk_init( &argc, &argv );
 806
 807     wxSetDetectableAutoRepeat( TRUE );
 808
 809     if (!wxApp::Initialize())
 810     {
 811         gdk_threads_leave();
 812         return -1;
 813     }
 814
 815     return 0;
 816 }
 817
 818
 819 int wxEntryInitGui()
 820 {
 821     int retValue = 0;
 822
 823     if ( !wxTheApp->OnInitGui() )
 824         retValue = -1;
 825
 826     wxGetRootWindow();
 827
 828     return retValue;
 829 }
 830
 831
 832 void wxEntryCleanup()
 833 {
 834 #if wxUSE_LOG
 835     // flush the logged messages if any
 836     wxLog *log = wxLog::GetActiveTarget();
 837     if (log != NULL && log->HasPendingMessages())
 838         log->Flush();
 839
 840     // continuing to use user defined log target is unsafe from now on because
 841     // some resources may be already unavailable, so replace it by something
 842     // more safe
 843     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 844     if ( oldlog )
 845         delete oldlog;
 846 #endif // wxUSE_LOG
 847
 848     wxApp::CleanUp();
 849
 850     gdk_threads_leave();
 851 }
 852
 853
 854 int wxEntry( int argc, char *argv[] )
 855 {
 856 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 857     // This seems to be necessary since there are 'rogue'
 858     // objects present at this point (perhaps global objects?)
 859     // Setting a checkpoint will ignore them as far as the
 860     // memory checking facility is concerned.
 861     // Of course you may argue that memory allocated in globals should be
 862     // checked, but this is a reasonable compromise.
 863     wxDebugContext::SetCheckpoint();
 864 #endif
 865     int err = wxEntryStart(argc, argv);
 866     if (err)
 867         return err;
 868
 869     if (!wxTheApp)
 870     {
 871         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 872                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 873
 874         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 875
 876         wxObject *test_app = app_ini();
 877
 878         wxTheApp = (wxApp*) test_app;
 879     }
 880
 881     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 882
 883     wxTheApp->argc = argc;
 884 #if wxUSE_UNICODE
 885     wxTheApp->argv = new wxChar*[argc+1];
 886     int mb_argc = 0;
 887     while (mb_argc < argc)
 888     {
 889         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 890         mb_argc++;
 891     }
 892     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 893 #else
 894     wxTheApp->argv = argv;
 895 #endif
 896
 897     if (wxTheApp->argc > 0)
 898     {
 899         wxFileName fname( wxTheApp->argv[0] );
 900         wxTheApp->SetAppName( fname.GetName() );
 901     }
 902
 903     int retValue;
 904     retValue = wxEntryInitGui();
 905
 906     // Here frames insert themselves automatically into wxTopLevelWindows by
 907     // getting created in OnInit().
 908     if ( retValue == 0 )
 909     {
 910         if ( !wxTheApp->OnInit() )
 911             retValue = -1;
 912     }
 913
 914     if ( retValue == 0 )
 915     {
 916         // Delete pending toplevel windows
 917         wxTheApp->DeletePendingObjects();
 918
 919         // When is the app not initialized ?
 920         wxTheApp->m_initialized = TRUE;
 921
 922         if (wxTheApp->Initialized())
 923         {
 924             wxTheApp->OnRun();
 925
 926             wxWindow *topWindow = wxTheApp->GetTopWindow();
 927
 928             // Delete all pending windows if any
 929             wxTheApp->DeletePendingObjects();
 930
 931             // Reset top window
 932             if (topWindow)
 933                 wxTheApp->SetTopWindow( (wxWindow*) NULL );
 934
 935             retValue = wxTheApp->OnExit();
 936         }
 937     }
 938
 939     wxEntryCleanup();
 940
 941     return retValue;
 942 }
 943
 944 #ifdef __WXDEBUG__
 945
 946 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 947 {
 948     m_isInAssert = TRUE;
 949
 950     wxAppBase::OnAssert(file, line, cond, msg);
 951
 952     m_isInAssert = FALSE;
 953 }
 954
 955 #endif // __WXDEBUG__
 956