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
  32 #if wxUSE_WX_RESOURCES
  33     #include "wx/resource.h"
  34 #endif
  35
  36 #include "wx/module.h"
  37 #include "wx/image.h"
  38
  39 #ifdef __WXUNIVERSAL__
  40     #include "wx/univ/theme.h"
  41     #include "wx/univ/renderer.h"
  42 #endif
  43
  44 #if wxUSE_THREADS
  45     #include "wx/thread.h"
  46 #endif
  47
  48 #include <unistd.h>
  49
  50 #ifdef HAVE_POLL
  51     #if defined(__VMS)
  52         #include <poll.h>
  53     #else
  54         // bug in the OpenBSD headers: at least in 3.1 there is no extern "C"
  55         // in neither poll.h nor sys/poll.h which results in link errors later
  56         #ifdef __OPENBSD__
  57             extern "C"
  58             {
  59         #endif
  60
  61         #include <sys/poll.h>
  62
  63         #ifdef __OPENBSD__
  64             };
  65         #endif
  66     #endif // platform
  67 #else // !HAVE_POLL
  68     // we implement poll() ourselves using select() which is supposed exist in
  69     // all modern Unices
  70     #include <sys/types.h>
  71     #include <sys/time.h>
  72     #include <unistd.h>
  73 #endif // HAVE_POLL/!HAVE_POLL
  74
  75 #include "wx/gtk/win_gtk.h"
  76
  77 #include <gtk/gtk.h>
  78
  79
  80 //-----------------------------------------------------------------------------
  81 // global data
  82 //-----------------------------------------------------------------------------
  83
  84 wxApp *wxTheApp = (wxApp *)  NULL;
  85 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  86
  87 bool   g_mainThreadLocked = FALSE;
  88 gint   g_pendingTag = 0;
  89
  90 static GtkWidget *gs_RootWindow = (GtkWidget*) NULL;
  91
  92 //-----------------------------------------------------------------------------
  93 // idle system
  94 //-----------------------------------------------------------------------------
  95
  96 extern bool g_isIdle;
  97
  98 void wxapp_install_idle_handler();
  99
 100 //-----------------------------------------------------------------------------
 101 // wxExit
 102 //-----------------------------------------------------------------------------
 103
 104 void wxExit()
 105 {
 106     gtk_main_quit();
 107 }
 108
 109 //-----------------------------------------------------------------------------
 110 // wxYield
 111 //-----------------------------------------------------------------------------
 112
 113 // not static because used by textctrl.cpp
 114 //
 115 // MT-FIXME
 116 bool wxIsInsideYield = FALSE;
 117
 118 bool wxApp::Yield(bool onlyIfNeeded)
 119 {
 120     if ( wxIsInsideYield )
 121     {
 122         if ( !onlyIfNeeded )
 123         {
 124             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 125         }
 126
 127         return FALSE;
 128     }
 129
 130 #if wxUSE_THREADS
 131     if ( !wxThread::IsMain() )
 132     {
 133         // can't call gtk_main_iteration() from other threads like this
 134         return TRUE;
 135     }
 136 #endif // wxUSE_THREADS
 137
 138     wxIsInsideYield = TRUE;
 139
 140     if (!g_isIdle)
 141     {
 142         // We need to remove idle callbacks or the loop will
 143         // never finish.
 144         gtk_idle_remove( m_idleTag );
 145         m_idleTag = 0;
 146         g_isIdle = TRUE;
 147     }
 148
 149     // disable log flushing from here because a call to wxYield() shouldn't
 150     // normally result in message boxes popping up &c
 151     wxLog::Suspend();
 152
 153     while (gtk_events_pending())
 154         gtk_main_iteration();
 155
 156     // It's necessary to call ProcessIdle() to update the frames sizes which
 157     // might have been changed (it also will update other things set from
 158     // OnUpdateUI() which is a nice (and desired) side effect). But we
 159     // call ProcessIdle() only once since this is not meant for longish
 160     // background jobs (controlled by wxIdleEvent::RequestMore() and the
 161     // return value of Processidle().
 162     ProcessIdle();
 163
 164     // let the logs be flashed again
 165     wxLog::Resume();
 166
 167     wxIsInsideYield = FALSE;
 168
 169     return TRUE;
 170 }
 171
 172 //-----------------------------------------------------------------------------
 173 // wxWakeUpIdle
 174 //-----------------------------------------------------------------------------
 175
 176 void wxWakeUpIdle()
 177 {
 178 #if wxUSE_THREADS
 179     if (!wxThread::IsMain())
 180         wxMutexGuiEnter();
 181 #endif
 182
 183     if (g_isIdle)
 184         wxapp_install_idle_handler();
 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( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 370
 371     g_isIdle = FALSE;
 372
 373     if (g_pendingTag == 0)
 374         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 375
 376     // This routine gets called by all event handlers
 377     // indicating that the idle is over. It may also
 378     // get called from other thread for sending events
 379     // to the main thread (and processing these in
 380     // idle time). Very low priority.
 381     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 382 }
 383
 384 //-----------------------------------------------------------------------------
 385 // Access to the root window global
 386 //-----------------------------------------------------------------------------
 387
 388 GtkWidget* wxGetRootWindow()
 389 {
 390     if (gs_RootWindow == NULL)
 391     {
 392         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 393         gtk_widget_realize( gs_RootWindow );
 394     }
 395     return gs_RootWindow;
 396 }
 397
 398 //-----------------------------------------------------------------------------
 399 // wxApp
 400 //-----------------------------------------------------------------------------
 401
 402 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 403
 404 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 405     EVT_IDLE(wxApp::OnIdle)
 406 END_EVENT_TABLE()
 407
 408 wxApp::wxApp()
 409 {
 410     m_initialized = FALSE;
 411 #ifdef __WXDEBUG__
 412     m_isInAssert = FALSE;
 413 #endif // __WXDEBUG__
 414
 415     m_idleTag = 0;
 416     wxapp_install_idle_handler();
 417
 418 #if wxUSE_THREADS
 419     g_main_set_poll_func( wxapp_poll_func );
 420 #endif
 421
 422     m_colorCube = (unsigned char*) NULL;
 423
 424     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 425     m_glVisualInfo = (void *) NULL;
 426 }
 427
 428 wxApp::~wxApp()
 429 {
 430     if (m_idleTag) gtk_idle_remove( m_idleTag );
 431
 432     if (m_colorCube) free(m_colorCube);
 433 }
 434
 435 bool wxApp::OnInitGui()
 436 {
 437     if ( !wxAppBase::OnInitGui() )
 438         return FALSE;
 439
 440     GdkVisual *visual = gdk_visual_get_system();
 441
 442     // if this is a wxGLApp (derived from wxApp), and we've already
 443     // chosen a specific visual, then derive the GdkVisual from that
 444     if (m_glVisualInfo != NULL)
 445     {
 446 #ifdef __WXGTK20__
 447         // seems gtk_widget_set_default_visual no longer exists?
 448         GdkVisual* vis = gtk_widget_get_default_visual();
 449 #else
 450         GdkVisual* vis = gdkx_visual_get(
 451             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 452         gtk_widget_set_default_visual( vis );
 453 #endif
 454
 455         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 456         gtk_widget_set_default_colormap( colormap );
 457
 458         visual = vis;
 459     }
 460
 461     // On some machines, the default visual is just 256 colours, so
 462     // we make sure we get the best. This can sometimes be wasteful.
 463
 464     else
 465     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 466     {
 467 #ifdef __WXGTK20__
 468         /* seems gtk_widget_set_default_visual no longer exists? */
 469         GdkVisual* vis = gtk_widget_get_default_visual();
 470 #else
 471         GdkVisual* vis = gdk_visual_get_best();
 472         gtk_widget_set_default_visual( vis );
 473 #endif
 474
 475         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 476         gtk_widget_set_default_colormap( colormap );
 477
 478         visual = vis;
 479     }
 480
 481     // Nothing to do for 15, 16, 24, 32 bit displays
 482     if (visual->depth > 8) return TRUE;
 483
 484     // initialize color cube for 8-bit color reduction dithering
 485
 486     GdkColormap *cmap = gtk_widget_get_default_colormap();
 487
 488     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 489
 490     for (int r = 0; r < 32; r++)
 491     {
 492         for (int g = 0; g < 32; g++)
 493         {
 494             for (int b = 0; b < 32; b++)
 495             {
 496                 int rr = (r << 3) | (r >> 2);
 497                 int gg = (g << 3) | (g >> 2);
 498                 int bb = (b << 3) | (b >> 2);
 499
 500                 int index = -1;
 501
 502                 GdkColor *colors = cmap->colors;
 503                 if (colors)
 504                 {
 505                     int max = 3 * 65536;
 506
 507                     for (int i = 0; i < cmap->size; i++)
 508                     {
 509                         int rdiff = ((rr << 8) - colors[i].red);
 510                         int gdiff = ((gg << 8) - colors[i].green);
 511                         int bdiff = ((bb << 8) - colors[i].blue);
 512                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 513                         if (sum < max)
 514                         {
 515                             index = i; max = sum;
 516                         }
 517                     }
 518                 }
 519                 else
 520                 {
 521                     // assume 8-bit true or static colors. this really exists
 522                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 523                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 524                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 525                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 526                 }
 527                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 528             }
 529         }
 530     }
 531
 532     return TRUE;
 533 }
 534
 535 GdkVisual *wxApp::GetGdkVisual()
 536 {
 537     GdkVisual *visual = NULL;
 538
 539     if (m_glVisualInfo)
 540         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 541     else
 542         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 543
 544     wxASSERT( visual );
 545
 546     return visual;
 547 }
 548
 549 bool wxApp::ProcessIdle()
 550 {
 551     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 552     node = wxTopLevelWindows.GetFirst();
 553     while (node)
 554     {
 555         wxWindow* win = node->GetData();
 556         CallInternalIdle( win );
 557
 558         node = node->GetNext();
 559     }
 560
 561     wxIdleEvent event;
 562     event.SetEventObject( this );
 563     ProcessEvent( event );
 564
 565     return event.MoreRequested();
 566 }
 567
 568 void wxApp::OnIdle( wxIdleEvent &event )
 569 {
 570     static bool s_inOnIdle = FALSE;
 571
 572     // Avoid recursion (via ProcessEvent default case)
 573     if (s_inOnIdle)
 574         return;
 575
 576     s_inOnIdle = TRUE;
 577
 578     // Resend in the main thread events which have been prepared in other
 579     // threads
 580     ProcessPendingEvents();
 581
 582     // 'Garbage' collection of windows deleted with Close()
 583     DeletePendingObjects();
 584
 585     // Send OnIdle events to all windows
 586     bool needMore = SendIdleEvents();
 587
 588     if (needMore)
 589         event.RequestMore(TRUE);
 590
 591     s_inOnIdle = FALSE;
 592 }
 593
 594 bool wxApp::SendIdleEvents()
 595 {
 596     bool needMore = FALSE;
 597
 598     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 599     while (node)
 600     {
 601         wxWindow* win = node->GetData();
 602         if (SendIdleEvents(win))
 603             needMore = TRUE;
 604
 605         node = node->GetNext();
 606     }
 607
 608     return needMore;
 609 }
 610
 611 bool wxApp::CallInternalIdle( wxWindow* win )
 612 {
 613     win->OnInternalIdle();
 614
 615     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 616     while (node)
 617     {
 618         wxWindow    *win = node->GetData();
 619
 620         CallInternalIdle( win );
 621         node = node->GetNext();
 622     }
 623
 624     return TRUE;
 625 }
 626
 627 bool wxApp::SendIdleEvents( wxWindow* win )
 628 {
 629     bool needMore = FALSE;
 630
 631     wxIdleEvent event;
 632     event.SetEventObject(win);
 633
 634     win->GetEventHandler()->ProcessEvent(event);
 635
 636     if (event.MoreRequested())
 637         needMore = TRUE;
 638
 639     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 640     while (node)
 641     {
 642         wxWindow    *win = node->GetData();
 643
 644         if (SendIdleEvents(win))
 645             needMore = TRUE;
 646         node = node->GetNext();
 647     }
 648
 649     return needMore;
 650 }
 651
 652 int wxApp::MainLoop()
 653 {
 654     gtk_main();
 655     return 0;
 656 }
 657
 658 void wxApp::ExitMainLoop()
 659 {
 660     if (gtk_main_level() > 0)
 661         gtk_main_quit();
 662 }
 663
 664 bool wxApp::Initialized()
 665 {
 666     return m_initialized;
 667 }
 668
 669 bool wxApp::Pending()
 670 {
 671     return (gtk_events_pending() > 0);
 672 }
 673
 674 void wxApp::Dispatch()
 675 {
 676     gtk_main_iteration();
 677 }
 678
 679 void wxApp::DeletePendingObjects()
 680 {
 681     wxNode *node = wxPendingDelete.GetFirst();
 682     while (node)
 683     {
 684         wxObject *obj = (wxObject *)node->GetData();
 685
 686         delete obj;
 687
 688         if (wxPendingDelete.Find(obj))
 689             delete node;
 690
 691         node = wxPendingDelete.GetFirst();
 692     }
 693 }
 694
 695 bool wxApp::Initialize()
 696 {
 697     wxClassInfo::InitializeClasses();
 698
 699     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 700     // create a module for that as it's part of the core.
 701 #if wxUSE_THREADS
 702     wxPendingEvents = new wxList();
 703     wxPendingEventsLocker = new wxCriticalSection();
 704 #endif
 705
 706     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 707     wxTheColourDatabase->Initialize();
 708
 709     wxInitializeStockLists();
 710     wxInitializeStockObjects();
 711
 712 #if wxUSE_WX_RESOURCES
 713     wxInitializeResourceSystem();
 714 #endif
 715
 716     wxModule::RegisterModules();
 717     if (!wxModule::InitializeModules())
 718         return FALSE;
 719
 720 #if wxUSE_INTL
 721     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 722 #endif
 723
 724     return TRUE;
 725 }
 726
 727 void wxApp::CleanUp()
 728 {
 729     wxModule::CleanUpModules();
 730
 731 #if wxUSE_WX_RESOURCES
 732     wxCleanUpResourceSystem();
 733 #endif
 734
 735     delete wxTheColourDatabase;
 736     wxTheColourDatabase = (wxColourDatabase*) NULL;
 737
 738     wxDeleteStockObjects();
 739
 740     wxDeleteStockLists();
 741
 742     delete wxTheApp;
 743     wxTheApp = (wxApp*) NULL;
 744
 745     wxClassInfo::CleanUpClasses();
 746
 747 #if wxUSE_THREADS
 748     delete wxPendingEvents;
 749     delete wxPendingEventsLocker;
 750 #endif
 751
 752     // check for memory leaks
 753 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 754     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 755     {
 756         wxLogDebug(wxT("There were memory leaks.\n"));
 757         wxDebugContext::Dump();
 758         wxDebugContext::PrintStatistics();
 759     }
 760 #endif // Debug
 761
 762 #if wxUSE_LOG
 763     // do this as the very last thing because everything else can log messages
 764     wxLog::DontCreateOnDemand();
 765
 766     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 767     if (oldLog)
 768         delete oldLog;
 769 #endif // wxUSE_LOG
 770 }
 771
 772 //-----------------------------------------------------------------------------
 773 // wxEntry
 774 //-----------------------------------------------------------------------------
 775
 776 // NB: argc and argv may be changed here, pass by reference!
 777 int wxEntryStart( int& argc, char *argv[] )
 778 {
 779 #if wxUSE_THREADS
 780     // GTK 1.2 up to version 1.2.3 has broken threads
 781     if ((gtk_major_version == 1) &&
 782         (gtk_minor_version == 2) &&
 783         (gtk_micro_version < 4))
 784     {
 785         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 786     }
 787     else
 788     {
 789         g_thread_init(NULL);
 790     }
 791 #endif
 792
 793     gtk_set_locale();
 794
 795     // We should have the wxUSE_WCHAR_T test on the _outside_
 796 #if wxUSE_WCHAR_T
 797 #if defined(__WXGTK20__)
 798     // gtk+ 2.0 supports Unicode through UTF-8 strings
 799     wxConvCurrent = &wxConvUTF8;
 800 #else
 801     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 802 #endif
 803 #else
 804     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 805 #endif
 806
 807     gdk_threads_enter();
 808
 809     gtk_init( &argc, &argv );
 810
 811     wxSetDetectableAutoRepeat( TRUE );
 812
 813     if (!wxApp::Initialize())
 814     {
 815         gdk_threads_leave();
 816         return -1;
 817     }
 818
 819     return 0;
 820 }
 821
 822
 823 int wxEntryInitGui()
 824 {
 825     int retValue = 0;
 826
 827     if ( !wxTheApp->OnInitGui() )
 828         retValue = -1;
 829
 830     wxGetRootWindow();
 831
 832     return retValue;
 833 }
 834
 835
 836 void wxEntryCleanup()
 837 {
 838 #if wxUSE_LOG
 839     // flush the logged messages if any
 840     wxLog *log = wxLog::GetActiveTarget();
 841     if (log != NULL && log->HasPendingMessages())
 842         log->Flush();
 843
 844     // continuing to use user defined log target is unsafe from now on because
 845     // some resources may be already unavailable, so replace it by something
 846     // more safe
 847     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 848     if ( oldlog )
 849         delete oldlog;
 850 #endif // wxUSE_LOG
 851
 852     wxApp::CleanUp();
 853
 854     gdk_threads_leave();
 855 }
 856
 857
 858 int wxEntry( int argc, char *argv[] )
 859 {
 860 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 861     // This seems to be necessary since there are 'rogue'
 862     // objects present at this point (perhaps global objects?)
 863     // Setting a checkpoint will ignore them as far as the
 864     // memory checking facility is concerned.
 865     // Of course you may argue that memory allocated in globals should be
 866     // checked, but this is a reasonable compromise.
 867     wxDebugContext::SetCheckpoint();
 868 #endif
 869     int err = wxEntryStart(argc, argv);
 870     if (err)
 871         return err;
 872
 873     if (!wxTheApp)
 874     {
 875         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 876                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 877
 878         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 879
 880         wxObject *test_app = app_ini();
 881
 882         wxTheApp = (wxApp*) test_app;
 883     }
 884
 885     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 886
 887     wxTheApp->argc = argc;
 888 #if wxUSE_UNICODE
 889     wxTheApp->argv = new wxChar*[argc+1];
 890     int mb_argc = 0;
 891     while (mb_argc < argc)
 892     {
 893         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 894         mb_argc++;
 895     }
 896     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 897 #else
 898     wxTheApp->argv = argv;
 899 #endif
 900
 901     if (wxTheApp->argc > 0)
 902     {
 903         wxFileName fname( wxTheApp->argv[0] );
 904         wxTheApp->SetAppName( fname.GetName() );
 905     }
 906
 907     int retValue;
 908     retValue = wxEntryInitGui();
 909
 910     // Here frames insert themselves automatically into wxTopLevelWindows by
 911     // getting created in OnInit().
 912     if ( retValue == 0 )
 913     {
 914         if ( !wxTheApp->OnInit() )
 915             retValue = -1;
 916     }
 917
 918     if ( retValue == 0 )
 919     {
 920         // Delete pending toplevel windows
 921         wxTheApp->DeletePendingObjects();
 922
 923         // When is the app not initialized ?
 924         wxTheApp->m_initialized = TRUE;
 925
 926         if (wxTheApp->Initialized())
 927         {
 928             wxTheApp->OnRun();
 929
 930             wxWindow *topWindow = wxTheApp->GetTopWindow();
 931
 932             // Delete all pending windows if any
 933             wxTheApp->DeletePendingObjects();
 934
 935             // Reset top window
 936             if (topWindow)
 937                 wxTheApp->SetTopWindow( (wxWindow*) NULL );
 938
 939             retValue = wxTheApp->OnExit();
 940         }
 941     }
 942
 943     wxEntryCleanup();
 944
 945     return retValue;
 946 }
 947
 948 #ifdef __WXDEBUG__
 949
 950 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 951 {
 952     m_isInAssert = TRUE;
 953
 954     wxAppBase::OnAssert(file, line, cond, msg);
 955
 956     m_isInAssert = FALSE;
 957 }
 958
 959 #endif // __WXDEBUG__
 960