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             if (win->IsKindOf(CLASSINFO(wxGenericMessageDialog)))
 243                 win->OnInternalIdle();
 244         }
 245         return TRUE;
 246     }
 247 #endif // __WXDEBUG__
 248
 249     // When getting called from GDK's time-out handler
 250     // we are no longer within GDK's grab on the GUI
 251     // thread so we must lock it here ourselves.
 252     gdk_threads_enter();
 253
 254     // Indicate that we are now in idle mode and event handlers
 255     // will have to reinstall the idle handler again.
 256     g_isIdle = TRUE;
 257     wxTheApp->m_idleTag = 0;
 258
 259     // Send idle event to all who request them as long as
 260     // no events have popped up in the event queue.
 261     while (wxTheApp->ProcessIdle() && (gtk_events_pending() == 0))
 262         ;
 263
 264     // Release lock again
 265     gdk_threads_leave();
 266
 267     // Return FALSE to indicate that no more idle events are
 268     // to be sent (single shot instead of continuous stream).
 269     return FALSE;
 270 }
 271
 272 #if wxUSE_THREADS
 273
 274 #ifdef HAVE_POLL
 275     #define wxPoll poll
 276     #define wxPollFd pollfd
 277 #else // !HAVE_POLL
 278
 279 typedef GPollFD wxPollFd;
 280
 281 int wxPoll(wxPollFd *ufds, unsigned int nfds, int timeout)
 282 {
 283     // convert timeout from ms to struct timeval (s/us)
 284     timeval tv_timeout;
 285     tv_timeout.tv_sec = timeout/1000;
 286     tv_timeout.tv_usec = (timeout%1000)*1000;
 287
 288     // remember the highest fd used here
 289     int fdMax = -1;
 290
 291     // and fill the sets for select()
 292     fd_set readfds;
 293     fd_set writefds;
 294     fd_set exceptfds;
 295     FD_ZERO(&readfds);
 296     FD_ZERO(&writefds);
 297     FD_ZERO(&exceptfds);
 298
 299     unsigned int i;
 300     for ( i = 0; i < nfds; i++ )
 301     {
 302         wxASSERT_MSG( ufds[i].fd < FD_SETSIZE, _T("fd out of range") );
 303
 304         if ( ufds[i].events & G_IO_IN )
 305             FD_SET(ufds[i].fd, &readfds);
 306
 307         if ( ufds[i].events & G_IO_PRI )
 308             FD_SET(ufds[i].fd, &exceptfds);
 309
 310         if ( ufds[i].events & G_IO_OUT )
 311             FD_SET(ufds[i].fd, &writefds);
 312
 313         if ( ufds[i].fd > fdMax )
 314             fdMax = ufds[i].fd;
 315     }
 316
 317     fdMax++;
 318     int res = select(fdMax, &readfds, &writefds, &exceptfds, &tv_timeout);
 319
 320     // translate the results back
 321     for ( i = 0; i < nfds; i++ )
 322     {
 323         ufds[i].revents = 0;
 324
 325         if ( FD_ISSET(ufds[i].fd, &readfds ) )
 326             ufds[i].revents |= G_IO_IN;
 327
 328         if ( FD_ISSET(ufds[i].fd, &exceptfds ) )
 329             ufds[i].revents |= G_IO_PRI;
 330
 331         if ( FD_ISSET(ufds[i].fd, &writefds ) )
 332             ufds[i].revents |= G_IO_OUT;
 333     }
 334
 335     return res;
 336 }
 337
 338 #endif // HAVE_POLL/!HAVE_POLL
 339
 340 static gint wxapp_poll_func( GPollFD *ufds, guint nfds, gint timeout )
 341 {
 342     gdk_threads_enter();
 343
 344     wxMutexGuiLeave();
 345     g_mainThreadLocked = TRUE;
 346
 347     // we rely on the fact that glib GPollFD struct is really just pollfd but
 348     // I wonder how wise is this in the long term (VZ)
 349     gint res = wxPoll( (wxPollFd *) ufds, nfds, timeout );
 350
 351     wxMutexGuiEnter();
 352     g_mainThreadLocked = FALSE;
 353
 354     gdk_threads_leave();
 355
 356     return res;
 357 }
 358
 359 #endif // wxUSE_THREADS
 360
 361 } // extern "C"
 362
 363 void wxapp_install_idle_handler()
 364 {
 365     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 366
 367     g_isIdle = FALSE;
 368
 369     if (g_pendingTag == 0)
 370         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 371
 372     // This routine gets called by all event handlers
 373     // indicating that the idle is over. It may also
 374     // get called from other thread for sending events
 375     // to the main thread (and processing these in
 376     // idle time). Very low priority.
 377     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 378 }
 379
 380 //-----------------------------------------------------------------------------
 381 // Access to the root window global
 382 //-----------------------------------------------------------------------------
 383
 384 GtkWidget* wxGetRootWindow()
 385 {
 386     if (gs_RootWindow == NULL)
 387     {
 388         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 389         gtk_widget_realize( gs_RootWindow );
 390     }
 391     return gs_RootWindow;
 392 }
 393
 394 //-----------------------------------------------------------------------------
 395 // wxApp
 396 //-----------------------------------------------------------------------------
 397
 398 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 399
 400 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 401     EVT_IDLE(wxApp::OnIdle)
 402 END_EVENT_TABLE()
 403
 404 wxApp::wxApp()
 405 {
 406     m_initialized = FALSE;
 407 #ifdef __WXDEBUG__
 408     m_isInAssert = FALSE;
 409 #endif // __WXDEBUG__
 410
 411     m_idleTag = 0;
 412     wxapp_install_idle_handler();
 413
 414 #if wxUSE_THREADS
 415     g_main_set_poll_func( wxapp_poll_func );
 416 #endif
 417
 418     m_colorCube = (unsigned char*) NULL;
 419
 420     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 421     m_glVisualInfo = (void *) NULL;
 422 }
 423
 424 wxApp::~wxApp()
 425 {
 426     if (m_idleTag) gtk_idle_remove( m_idleTag );
 427
 428     if (m_colorCube) free(m_colorCube);
 429 }
 430
 431 bool wxApp::OnInitGui()
 432 {
 433     if ( !wxAppBase::OnInitGui() )
 434         return FALSE;
 435
 436     GdkVisual *visual = gdk_visual_get_system();
 437
 438     // if this is a wxGLApp (derived from wxApp), and we've already
 439     // chosen a specific visual, then derive the GdkVisual from that
 440     if (m_glVisualInfo != NULL)
 441     {
 442 #ifdef __WXGTK20__
 443         // seems gtk_widget_set_default_visual no longer exists?
 444         GdkVisual* vis = gtk_widget_get_default_visual();
 445 #else
 446         GdkVisual* vis = gdkx_visual_get(
 447             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 448         gtk_widget_set_default_visual( vis );
 449 #endif
 450
 451         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 452         gtk_widget_set_default_colormap( colormap );
 453
 454         visual = vis;
 455     }
 456
 457     // On some machines, the default visual is just 256 colours, so
 458     // we make sure we get the best. This can sometimes be wasteful.
 459
 460     else
 461     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 462     {
 463 #ifdef __WXGTK20__
 464         /* seems gtk_widget_set_default_visual no longer exists? */
 465         GdkVisual* vis = gtk_widget_get_default_visual();
 466 #else
 467         GdkVisual* vis = gdk_visual_get_best();
 468         gtk_widget_set_default_visual( vis );
 469 #endif
 470
 471         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 472         gtk_widget_set_default_colormap( colormap );
 473
 474         visual = vis;
 475     }
 476
 477     // Nothing to do for 15, 16, 24, 32 bit displays
 478     if (visual->depth > 8) return TRUE;
 479
 480     // initialize color cube for 8-bit color reduction dithering
 481
 482     GdkColormap *cmap = gtk_widget_get_default_colormap();
 483
 484     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 485
 486     for (int r = 0; r < 32; r++)
 487     {
 488         for (int g = 0; g < 32; g++)
 489         {
 490             for (int b = 0; b < 32; b++)
 491             {
 492                 int rr = (r << 3) | (r >> 2);
 493                 int gg = (g << 3) | (g >> 2);
 494                 int bb = (b << 3) | (b >> 2);
 495
 496                 int index = -1;
 497
 498                 GdkColor *colors = cmap->colors;
 499                 if (colors)
 500                 {
 501                     int max = 3 * 65536;
 502
 503                     for (int i = 0; i < cmap->size; i++)
 504                     {
 505                         int rdiff = ((rr << 8) - colors[i].red);
 506                         int gdiff = ((gg << 8) - colors[i].green);
 507                         int bdiff = ((bb << 8) - colors[i].blue);
 508                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 509                         if (sum < max)
 510                         {
 511                             index = i; max = sum;
 512                         }
 513                     }
 514                 }
 515                 else
 516                 {
 517                     // assume 8-bit true or static colors. this really exists
 518                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 519                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 520                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 521                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 522                 }
 523                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 524             }
 525         }
 526     }
 527
 528     return TRUE;
 529 }
 530
 531 GdkVisual *wxApp::GetGdkVisual()
 532 {
 533     GdkVisual *visual = NULL;
 534
 535     if (m_glVisualInfo)
 536         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 537     else
 538         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 539
 540     wxASSERT( visual );
 541
 542     return visual;
 543 }
 544
 545 bool wxApp::ProcessIdle()
 546 {
 547     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 548     node = wxTopLevelWindows.GetFirst();
 549     while (node)
 550     {
 551         wxWindow* win = node->GetData();
 552         CallInternalIdle( win );
 553
 554         node = node->GetNext();
 555     }
 556
 557     wxIdleEvent event;
 558     event.SetEventObject( this );
 559     ProcessEvent( event );
 560
 561     return event.MoreRequested();
 562 }
 563
 564 void wxApp::OnIdle( wxIdleEvent &event )
 565 {
 566     static bool s_inOnIdle = FALSE;
 567
 568     // Avoid recursion (via ProcessEvent default case)
 569     if (s_inOnIdle)
 570         return;
 571
 572     s_inOnIdle = TRUE;
 573
 574     // Resend in the main thread events which have been prepared in other
 575     // threads
 576     ProcessPendingEvents();
 577
 578     // 'Garbage' collection of windows deleted with Close()
 579     DeletePendingObjects();
 580
 581     // Send OnIdle events to all windows
 582     bool needMore = SendIdleEvents();
 583
 584     if (needMore)
 585         event.RequestMore(TRUE);
 586
 587     s_inOnIdle = FALSE;
 588 }
 589
 590 bool wxApp::SendIdleEvents()
 591 {
 592     bool needMore = FALSE;
 593
 594     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 595     while (node)
 596     {
 597         wxWindow* win = node->GetData();
 598         if (SendIdleEvents(win))
 599             needMore = TRUE;
 600
 601         node = node->GetNext();
 602     }
 603
 604     return needMore;
 605 }
 606
 607 bool wxApp::CallInternalIdle( wxWindow* win )
 608 {
 609     win->OnInternalIdle();
 610
 611     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 612     while (node)
 613     {
 614         wxWindow    *win = node->GetData();
 615
 616         CallInternalIdle( win );
 617         node = node->GetNext();
 618     }
 619
 620     return TRUE;
 621 }
 622
 623 bool wxApp::SendIdleEvents( wxWindow* win )
 624 {
 625     bool needMore = FALSE;
 626
 627     wxIdleEvent event;
 628     event.SetEventObject(win);
 629
 630     win->GetEventHandler()->ProcessEvent(event);
 631
 632     if (event.MoreRequested())
 633         needMore = TRUE;
 634
 635     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 636     while (node)
 637     {
 638         wxWindow    *win = node->GetData();
 639
 640         if (SendIdleEvents(win))
 641             needMore = TRUE;
 642         node = node->GetNext();
 643     }
 644
 645     return needMore;
 646 }
 647
 648 int wxApp::MainLoop()
 649 {
 650     gtk_main();
 651     return 0;
 652 }
 653
 654 void wxApp::ExitMainLoop()
 655 {
 656     if (gtk_main_level() > 0)
 657         gtk_main_quit();
 658 }
 659
 660 bool wxApp::Initialized()
 661 {
 662     return m_initialized;
 663 }
 664
 665 bool wxApp::Pending()
 666 {
 667     return (gtk_events_pending() > 0);
 668 }
 669
 670 void wxApp::Dispatch()
 671 {
 672     gtk_main_iteration();
 673 }
 674
 675 void wxApp::DeletePendingObjects()
 676 {
 677     wxNode *node = wxPendingDelete.GetFirst();
 678     while (node)
 679     {
 680         wxObject *obj = (wxObject *)node->GetData();
 681
 682         delete obj;
 683
 684         if (wxPendingDelete.Find(obj))
 685             delete node;
 686
 687         node = wxPendingDelete.GetFirst();
 688     }
 689 }
 690
 691 bool wxApp::Initialize()
 692 {
 693     wxClassInfo::InitializeClasses();
 694
 695     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 696     // create a module for that as it's part of the core.
 697 #if wxUSE_THREADS
 698     wxPendingEvents = new wxList();
 699     wxPendingEventsLocker = new wxCriticalSection();
 700 #endif
 701
 702     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 703     wxTheColourDatabase->Initialize();
 704
 705     wxInitializeStockLists();
 706     wxInitializeStockObjects();
 707
 708 #if wxUSE_WX_RESOURCES
 709     wxInitializeResourceSystem();
 710 #endif
 711
 712     wxModule::RegisterModules();
 713     if (!wxModule::InitializeModules())
 714         return FALSE;
 715
 716 #if wxUSE_INTL
 717     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 718 #endif
 719
 720     return TRUE;
 721 }
 722
 723 void wxApp::CleanUp()
 724 {
 725     wxModule::CleanUpModules();
 726
 727 #if wxUSE_WX_RESOURCES
 728     wxCleanUpResourceSystem();
 729 #endif
 730
 731     delete wxTheColourDatabase;
 732     wxTheColourDatabase = (wxColourDatabase*) NULL;
 733
 734     wxDeleteStockObjects();
 735
 736     wxDeleteStockLists();
 737
 738     delete wxTheApp;
 739     wxTheApp = (wxApp*) NULL;
 740
 741     wxClassInfo::CleanUpClasses();
 742
 743 #if wxUSE_THREADS
 744     delete wxPendingEvents;
 745     delete wxPendingEventsLocker;
 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