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