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     // GD: this assert is raised when using the thread sample (which works)
 370     //     so the test is probably not so easy. Can widget callbacks be
 371     //     triggered from child threads and, if so, for which widgets?
 372     // wxASSERT_MSG( wxThread::IsMain() || gs_WakeUpIdle, wxT("attempt to install idle handler from widget callback in child thread (should be exclusively from wxWakeUpIdle)") );
 373
 374     wxASSERT_MSG( wxTheApp->m_idleTag == 0, wxT("attempt to install idle handler twice") );
 375
 376     g_isIdle = FALSE;
 377
 378     if (g_pendingTag == 0)
 379         g_pendingTag = gtk_idle_add_priority( 900, wxapp_pending_callback, (gpointer) NULL );
 380
 381     // This routine gets called by all event handlers
 382     // indicating that the idle is over. It may also
 383     // get called from other thread for sending events
 384     // to the main thread (and processing these in
 385     // idle time). Very low priority.
 386     wxTheApp->m_idleTag = gtk_idle_add_priority( 1000, wxapp_idle_callback, (gpointer) NULL );
 387 }
 388
 389 //-----------------------------------------------------------------------------
 390 // Access to the root window global
 391 //-----------------------------------------------------------------------------
 392
 393 GtkWidget* wxGetRootWindow()
 394 {
 395     if (gs_RootWindow == NULL)
 396     {
 397         gs_RootWindow = gtk_window_new( GTK_WINDOW_TOPLEVEL );
 398         gtk_widget_realize( gs_RootWindow );
 399     }
 400     return gs_RootWindow;
 401 }
 402
 403 //-----------------------------------------------------------------------------
 404 // wxApp
 405 //-----------------------------------------------------------------------------
 406
 407 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 408
 409 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 410     EVT_IDLE(wxApp::OnIdle)
 411 END_EVENT_TABLE()
 412
 413 wxApp::wxApp()
 414 {
 415     m_initialized = FALSE;
 416 #ifdef __WXDEBUG__
 417     m_isInAssert = FALSE;
 418 #endif // __WXDEBUG__
 419
 420     m_idleTag = 0;
 421     wxapp_install_idle_handler();
 422
 423 #if wxUSE_THREADS
 424     g_main_set_poll_func( wxapp_poll_func );
 425 #endif
 426
 427     m_colorCube = (unsigned char*) NULL;
 428
 429     // this is NULL for a "regular" wxApp, but is set (and freed) by a wxGLApp
 430     m_glVisualInfo = (void *) NULL;
 431 }
 432
 433 wxApp::~wxApp()
 434 {
 435     if (m_idleTag) gtk_idle_remove( m_idleTag );
 436
 437     if (m_colorCube) free(m_colorCube);
 438 }
 439
 440 bool wxApp::OnInitGui()
 441 {
 442     if ( !wxAppBase::OnInitGui() )
 443         return FALSE;
 444
 445     GdkVisual *visual = gdk_visual_get_system();
 446
 447     // if this is a wxGLApp (derived from wxApp), and we've already
 448     // chosen a specific visual, then derive the GdkVisual from that
 449     if (m_glVisualInfo != NULL)
 450     {
 451 #ifdef __WXGTK20__
 452         // seems gtk_widget_set_default_visual no longer exists?
 453         GdkVisual* vis = gtk_widget_get_default_visual();
 454 #else
 455         GdkVisual* vis = gdkx_visual_get(
 456             ((XVisualInfo *) m_glVisualInfo) ->visualid );
 457         gtk_widget_set_default_visual( vis );
 458 #endif
 459
 460         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 461         gtk_widget_set_default_colormap( colormap );
 462
 463         visual = vis;
 464     }
 465
 466     // On some machines, the default visual is just 256 colours, so
 467     // we make sure we get the best. This can sometimes be wasteful.
 468
 469     else
 470     if ((gdk_visual_get_best() != gdk_visual_get_system()) && (m_useBestVisual))
 471     {
 472 #ifdef __WXGTK20__
 473         /* seems gtk_widget_set_default_visual no longer exists? */
 474         GdkVisual* vis = gtk_widget_get_default_visual();
 475 #else
 476         GdkVisual* vis = gdk_visual_get_best();
 477         gtk_widget_set_default_visual( vis );
 478 #endif
 479
 480         GdkColormap *colormap = gdk_colormap_new( vis, FALSE );
 481         gtk_widget_set_default_colormap( colormap );
 482
 483         visual = vis;
 484     }
 485
 486     // Nothing to do for 15, 16, 24, 32 bit displays
 487     if (visual->depth > 8) return TRUE;
 488
 489     // initialize color cube for 8-bit color reduction dithering
 490
 491     GdkColormap *cmap = gtk_widget_get_default_colormap();
 492
 493     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 494
 495     for (int r = 0; r < 32; r++)
 496     {
 497         for (int g = 0; g < 32; g++)
 498         {
 499             for (int b = 0; b < 32; b++)
 500             {
 501                 int rr = (r << 3) | (r >> 2);
 502                 int gg = (g << 3) | (g >> 2);
 503                 int bb = (b << 3) | (b >> 2);
 504
 505                 int index = -1;
 506
 507                 GdkColor *colors = cmap->colors;
 508                 if (colors)
 509                 {
 510                     int max = 3 * 65536;
 511
 512                     for (int i = 0; i < cmap->size; i++)
 513                     {
 514                         int rdiff = ((rr << 8) - colors[i].red);
 515                         int gdiff = ((gg << 8) - colors[i].green);
 516                         int bdiff = ((bb << 8) - colors[i].blue);
 517                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 518                         if (sum < max)
 519                         {
 520                             index = i; max = sum;
 521                         }
 522                     }
 523                 }
 524                 else
 525                 {
 526                     // assume 8-bit true or static colors. this really exists
 527                     GdkVisual* vis = gdk_colormap_get_visual( cmap );
 528                     index = (r >> (5 - vis->red_prec)) << vis->red_shift;
 529                     index |= (g >> (5 - vis->green_prec)) << vis->green_shift;
 530                     index |= (b >> (5 - vis->blue_prec)) << vis->blue_shift;
 531                 }
 532                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
 533             }
 534         }
 535     }
 536
 537     return TRUE;
 538 }
 539
 540 GdkVisual *wxApp::GetGdkVisual()
 541 {
 542     GdkVisual *visual = NULL;
 543
 544     if (m_glVisualInfo)
 545         visual = gdkx_visual_get( ((XVisualInfo *) m_glVisualInfo)->visualid );
 546     else
 547         visual = gdk_window_get_visual( wxGetRootWindow()->window );
 548
 549     wxASSERT( visual );
 550
 551     return visual;
 552 }
 553
 554 bool wxApp::ProcessIdle()
 555 {
 556     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 557     node = wxTopLevelWindows.GetFirst();
 558     while (node)
 559     {
 560         wxWindow* win = node->GetData();
 561         CallInternalIdle( win );
 562
 563         node = node->GetNext();
 564     }
 565
 566     wxIdleEvent event;
 567     event.SetEventObject( this );
 568     ProcessEvent( event );
 569
 570     return event.MoreRequested();
 571 }
 572
 573 void wxApp::OnIdle( wxIdleEvent &event )
 574 {
 575     static bool s_inOnIdle = FALSE;
 576
 577     // Avoid recursion (via ProcessEvent default case)
 578     if (s_inOnIdle)
 579         return;
 580
 581     s_inOnIdle = TRUE;
 582
 583     // Resend in the main thread events which have been prepared in other
 584     // threads
 585     ProcessPendingEvents();
 586
 587     // 'Garbage' collection of windows deleted with Close()
 588     DeletePendingObjects();
 589
 590     // Send OnIdle events to all windows
 591     bool needMore = SendIdleEvents();
 592
 593     if (needMore)
 594         event.RequestMore(TRUE);
 595
 596     s_inOnIdle = FALSE;
 597 }
 598
 599 bool wxApp::SendIdleEvents()
 600 {
 601     bool needMore = FALSE;
 602
 603     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 604     while (node)
 605     {
 606         wxWindow* win = node->GetData();
 607         if (SendIdleEvents(win))
 608             needMore = TRUE;
 609
 610         node = node->GetNext();
 611     }
 612
 613     return needMore;
 614 }
 615
 616 bool wxApp::CallInternalIdle( wxWindow* win )
 617 {
 618     win->OnInternalIdle();
 619
 620     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 621     while (node)
 622     {
 623         wxWindow    *win = node->GetData();
 624
 625         CallInternalIdle( win );
 626         node = node->GetNext();
 627     }
 628
 629     return TRUE;
 630 }
 631
 632 bool wxApp::SendIdleEvents( wxWindow* win )
 633 {
 634     bool needMore = FALSE;
 635
 636     wxIdleEvent event;
 637     event.SetEventObject(win);
 638
 639     win->GetEventHandler()->ProcessEvent(event);
 640
 641     if (event.MoreRequested())
 642         needMore = TRUE;
 643
 644     wxWindowList::Node  *node = win->GetChildren().GetFirst();
 645     while (node)
 646     {
 647         wxWindow    *win = node->GetData();
 648
 649         if (SendIdleEvents(win))
 650             needMore = TRUE;
 651         node = node->GetNext();
 652     }
 653
 654     return needMore;
 655 }
 656
 657 int wxApp::MainLoop()
 658 {
 659     gtk_main();
 660     return 0;
 661 }
 662
 663 void wxApp::ExitMainLoop()
 664 {
 665     if (gtk_main_level() > 0)
 666         gtk_main_quit();
 667 }
 668
 669 bool wxApp::Initialized()
 670 {
 671     return m_initialized;
 672 }
 673
 674 bool wxApp::Pending()
 675 {
 676     return (gtk_events_pending() > 0);
 677 }
 678
 679 void wxApp::Dispatch()
 680 {
 681     gtk_main_iteration();
 682 }
 683
 684 void wxApp::DeletePendingObjects()
 685 {
 686     wxNode *node = wxPendingDelete.GetFirst();
 687     while (node)
 688     {
 689         wxObject *obj = (wxObject *)node->GetData();
 690
 691         delete obj;
 692
 693         if (wxPendingDelete.Find(obj))
 694             delete node;
 695
 696         node = wxPendingDelete.GetFirst();
 697     }
 698 }
 699
 700 bool wxApp::Initialize()
 701 {
 702     wxClassInfo::InitializeClasses();
 703
 704     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 705     // create a module for that as it's part of the core.
 706 #if wxUSE_THREADS
 707     wxPendingEvents = new wxList();
 708     wxPendingEventsLocker = new wxCriticalSection();
 709 #endif
 710
 711     wxTheColourDatabase = new wxColourDatabase( wxKEY_STRING );
 712     wxTheColourDatabase->Initialize();
 713
 714     wxInitializeStockLists();
 715     wxInitializeStockObjects();
 716
 717     wxModule::RegisterModules();
 718     if (!wxModule::InitializeModules())
 719         return FALSE;
 720
 721 #if wxUSE_INTL
 722     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 723 #endif
 724
 725     return TRUE;
 726 }
 727
 728 void wxApp::CleanUp()
 729 {
 730     wxModule::CleanUpModules();
 731
 732     delete wxTheColourDatabase;
 733     wxTheColourDatabase = (wxColourDatabase*) NULL;
 734
 735     wxDeleteStockObjects();
 736
 737     wxDeleteStockLists();
 738
 739     delete wxTheApp;
 740     wxTheApp = (wxApp*) NULL;
 741
 742     wxClassInfo::CleanUpClasses();
 743
 744 #if wxUSE_THREADS
 745     delete wxPendingEvents;
 746     wxPendingEvents = NULL;
 747     delete wxPendingEventsLocker;
 748     wxPendingEventsLocker = NULL;
 749 #endif
 750
 751     // check for memory leaks
 752 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 753     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 754     {
 755         wxLogDebug(wxT("There were memory leaks.\n"));
 756         wxDebugContext::Dump();
 757         wxDebugContext::PrintStatistics();
 758     }
 759 #endif // Debug
 760
 761 #if wxUSE_LOG
 762     // do this as the very last thing because everything else can log messages
 763     wxLog::DontCreateOnDemand();
 764
 765     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 766     if (oldLog)
 767         delete oldLog;
 768 #endif // wxUSE_LOG
 769 }
 770
 771 //-----------------------------------------------------------------------------
 772 // wxEntry
 773 //-----------------------------------------------------------------------------
 774
 775 // NB: argc and argv may be changed here, pass by reference!
 776 int wxEntryStart( int& argc, char *argv[] )
 777 {
 778 #if wxUSE_THREADS
 779     // GTK 1.2 up to version 1.2.3 has broken threads
 780     if ((gtk_major_version == 1) &&
 781         (gtk_minor_version == 2) &&
 782         (gtk_micro_version < 4))
 783     {
 784         printf( "wxWindows warning: GUI threading disabled due to outdated GTK version\n" );
 785     }
 786     else
 787     {
 788         g_thread_init(NULL);
 789     }
 790 #endif
 791
 792     gtk_set_locale();
 793
 794     // We should have the wxUSE_WCHAR_T test on the _outside_
 795 #if wxUSE_WCHAR_T
 796 #if defined(__WXGTK20__)
 797     // gtk+ 2.0 supports Unicode through UTF-8 strings
 798     wxConvCurrent = &wxConvUTF8;
 799 #else
 800     if (!wxOKlibc()) wxConvCurrent = &wxConvLocal;
 801 #endif
 802 #else
 803     if (!wxOKlibc()) wxConvCurrent = (wxMBConv*) NULL;
 804 #endif
 805
 806     gtk_init( &argc, &argv );
 807
 808     /* we can not enter threads before gtk_init is done */
 809     gdk_threads_enter();
 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