src/x11/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "app.h"
  14 #endif
  15
  16 #include "wx/frame.h"
  17 #include "wx/app.h"
  18 #include "wx/utils.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/pen.h"
  21 #include "wx/brush.h"
  22 #include "wx/cursor.h"
  23 #include "wx/icon.h"
  24 #include "wx/dialog.h"
  25 #include "wx/msgdlg.h"
  26 #include "wx/log.h"
  27 #include "wx/module.h"
  28 #include "wx/memory.h"
  29 #include "wx/log.h"
  30 #include "wx/intl.h"
  31 #include "wx/evtloop.h"
  32
  33 #if wxUSE_THREADS
  34     #include "wx/thread.h"
  35 #endif
  36
  37 #if wxUSE_WX_RESOURCES
  38     #include "wx/resource.h"
  39 #endif
  40
  41 #ifdef __VMS__
  42 #pragma message disable nosimpint
  43 #endif
  44 #include <X11/Xlib.h>
  45 #include <X11/Xutil.h>
  46 #include <X11/Xresource.h>
  47 #include <X11/Xatom.h>
  48 #ifdef __VMS__
  49 #pragma message enable nosimpint
  50 #endif
  51
  52 #include "wx/x11/private.h"
  53
  54 #include <string.h>
  55
  56 extern char *wxBuffer;
  57 extern wxList wxPendingDelete;
  58
  59 wxApp *wxTheApp = NULL;
  60
  61 wxHashTable *wxWidgetHashTable = NULL;
  62
  63 static Window wxGetParentWindow(Window window);
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  66
  67 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  68     EVT_IDLE(wxApp::OnIdle)
  69 END_EVENT_TABLE()
  70
  71 #ifdef __WXDEBUG__
  72 typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  73
  74 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  75
  76 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  77 {
  78     // just forward to the default handler for now
  79     return gs_pfnXErrorHandler(dpy, xevent);
  80 }
  81 #endif // __WXDEBUG__
  82
  83 long wxApp::sm_lastMessageTime = 0;
  84
  85 bool wxApp::Initialize()
  86 {
  87     wxBuffer = new char[BUFSIZ + 512];
  88
  89     wxClassInfo::InitializeClasses();
  90
  91     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  92     // create a module for that as it's part of the core.
  93 #if wxUSE_THREADS
  94     wxPendingEventsLocker = new wxCriticalSection();
  95 #endif
  96
  97     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  98     wxTheColourDatabase->Initialize();
  99
 100     wxInitializeStockLists();
 101     wxInitializeStockObjects();
 102
 103 #if wxUSE_WX_RESOURCES
 104     wxInitializeResourceSystem();
 105 #endif
 106
 107     wxBitmap::InitStandardHandlers();
 108
 109     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 110
 111     wxModule::RegisterModules();
 112     if (!wxModule::InitializeModules()) return FALSE;
 113
 114     return TRUE;
 115 }
 116
 117 void wxApp::CleanUp()
 118 {
 119     delete wxWidgetHashTable;
 120     wxWidgetHashTable = NULL;
 121
 122     wxModule::CleanUpModules();
 123
 124 #if wxUSE_WX_RESOURCES
 125     wxCleanUpResourceSystem();
 126 #endif
 127
 128     wxDeleteStockObjects() ;
 129
 130     // Destroy all GDI lists, etc.
 131
 132     wxDeleteStockLists();
 133
 134     delete wxTheColourDatabase;
 135     wxTheColourDatabase = NULL;
 136
 137     wxBitmap::CleanUpHandlers();
 138
 139     delete[] wxBuffer;
 140     wxBuffer = NULL;
 141
 142     wxClassInfo::CleanUpClasses();
 143
 144     delete wxTheApp;
 145     wxTheApp = NULL;
 146
 147     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 148     // create a module for that as it's part of the core.
 149 #if wxUSE_THREADS
 150     delete wxPendingEvents;
 151     delete wxPendingEventsLocker;
 152 #endif
 153
 154 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 155     // At this point we want to check if there are any memory
 156     // blocks that aren't part of the wxDebugContext itself,
 157     // as a special case. Then when dumping we need to ignore
 158     // wxDebugContext, too.
 159     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 160     {
 161         wxLogDebug("There were memory leaks.\n");
 162         wxDebugContext::Dump();
 163         wxDebugContext::PrintStatistics();
 164     }
 165 #endif
 166
 167     // do it as the very last thing because everything else can log messages
 168     wxLog::DontCreateOnDemand();
 169     // do it as the very last thing because everything else can log messages
 170     delete wxLog::SetActiveTarget(NULL);
 171 }
 172
 173 int wxEntry( int argc, char *argv[] )
 174 {
 175 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 176     // This seems to be necessary since there are 'rogue'
 177     // objects present at this point (perhaps global objects?)
 178     // Setting a checkpoint will ignore them as far as the
 179     // memory checking facility is concerned.
 180     // Of course you may argue that memory allocated in globals should be
 181     // checked, but this is a reasonable compromise.
 182     wxDebugContext::SetCheckpoint();
 183 #endif
 184
 185     if (!wxApp::Initialize())
 186         return FALSE;
 187
 188     if (!wxTheApp)
 189     {
 190         if (!wxApp::GetInitializerFunction())
 191         {
 192             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 193             return 0;
 194         };
 195
 196         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 197     };
 198
 199     if (!wxTheApp)
 200     {
 201         printf( "wxWindows error: wxTheApp == NULL\n" );
 202         return 0;
 203     };
 204
 205     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 206     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 207
 208     wxTheApp->argc = argc;
 209     wxTheApp->argv = argv;
 210
 211     // GUI-specific initialization, such as creating an app context.
 212     wxTheApp->OnInitGui();
 213
 214     // Here frames insert themselves automatically into wxTopLevelWindows by
 215     // getting created in OnInit().
 216
 217     int retValue = 0;
 218     if (wxTheApp->OnInit())
 219     {
 220         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 221     }
 222
 223     // flush the logged messages if any
 224     wxLog *pLog = wxLog::GetActiveTarget();
 225     if ( pLog != NULL && pLog->HasPendingMessages() )
 226         pLog->Flush();
 227
 228     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 229     // for further messages
 230
 231     if (wxTheApp->GetTopWindow())
 232     {
 233         delete wxTheApp->GetTopWindow();
 234         wxTheApp->SetTopWindow(NULL);
 235     }
 236
 237     wxTheApp->DeletePendingObjects();
 238
 239     wxTheApp->OnExit();
 240
 241     wxApp::CleanUp();
 242
 243     return retValue;
 244 };
 245
 246 // Static member initialization
 247 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 248
 249 wxApp::wxApp()
 250 {
 251     m_topWindow = NULL;
 252     wxTheApp = this;
 253     m_className = "";
 254     m_wantDebugOutput = TRUE ;
 255     m_appName = "";
 256     argc = 0;
 257     argv = NULL;
 258     m_exitOnFrameDelete = TRUE;
 259     m_mainColormap = (WXColormap) NULL;
 260     m_topLevelWidget = (WXWindow) NULL;
 261     m_maxRequestSize = 0;
 262     m_initialDisplay = (WXDisplay*) 0;
 263     m_mainLoop = NULL;
 264 }
 265
 266 bool wxApp::Initialized()
 267 {
 268     if (GetTopWindow())
 269         return TRUE;
 270     else
 271         return FALSE;
 272 }
 273
 274 int wxApp::MainLoop()
 275 {
 276      int rt;
 277     m_mainLoop = new wxEventLoop;
 278
 279     rt = m_mainLoop->Run();
 280
 281     delete m_mainLoop;
 282     m_mainLoop = NULL;
 283     return rt;
 284 }
 285
 286 // Processes an X event.
 287 void wxApp::ProcessXEvent(WXEvent* _event)
 288 {
 289     XEvent* event = (XEvent*) _event;
 290
 291     wxWindow* win = NULL;
 292     Window window = event->xany.window;
 293     Window actualWindow = window;
 294
 295     // Find the first wxWindow that corresponds to this event window
 296     // TODO: may need to translate coordinates from actualWindow
 297     // to window, if the receiving window != wxWindow window
 298     while (window && !(win = wxGetWindowFromTable(window)))
 299         window = wxGetParentWindow(window);
 300
 301     // TODO: shouldn't all the ProcessEvents below
 302     // be win->GetEventHandler()->ProcessEvent?
 303     switch (event->type)
 304     {
 305         case KeyPress:
 306         {
 307             if (win && !win->IsEnabled())
 308                 return;
 309
 310             if (CheckForAccelerator(_event))
 311             {
 312                 // Do nothing! We intercepted and processed the event as an
 313                 // accelerator.
 314                 return;
 315             }
 316             else
 317             {
 318                 if (win)
 319                 {
 320                     wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 321                     wxTranslateKeyEvent(keyEvent, win, window, event);
 322
 323                     // We didn't process wxEVT_KEY_DOWN, so send
 324                     // wxEVT_CHAR
 325                     if (!win->GetEventHandler()->ProcessEvent( keyEvent ))
 326                     {
 327                         keyEvent.SetEventType(wxEVT_CHAR);
 328                         win->GetEventHandler()->ProcessEvent( keyEvent );
 329                     }
 330
 331                     // We intercepted and processed the key down event
 332                     return;
 333                 }
 334             }
 335             return;
 336         }
 337         case KeyRelease:
 338         {
 339             if (win && !win->IsEnabled())
 340                 return;
 341
 342             if (win)
 343             {
 344                 wxKeyEvent keyEvent(wxEVT_KEY_UP);
 345                 wxTranslateKeyEvent(keyEvent, win, window, event);
 346
 347                 win->GetEventHandler()->ProcessEvent( keyEvent );
 348             }
 349             return;
 350         }
 351         case PropertyNotify:
 352         {
 353             HandlePropertyChange(_event);
 354             return;
 355         }
 356         case ClientMessage:
 357         {
 358             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);;
 359             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);;
 360
 361             if (event->xclient.message_type == wm_protocols)
 362             {
 363                 if (event->xclient.data.l[0] == wm_delete_window)
 364                 {
 365                     if (win)
 366                     {
 367                         win->Close(FALSE);
 368                     }
 369                 }
 370             }
 371             return;
 372         }
 373         case ResizeRequest:
 374         {
 375             /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 376             * If resize event, don't resize until the last resize event for this
 377             * window is recieved. Prevents flicker as windows are resized.
 378             */
 379
 380             Display *disp = (Display*) wxGetDisplay();
 381             XEvent report;
 382
 383             //  to avoid flicker
 384             report = * event;
 385             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 386
 387             // TODO: when implementing refresh optimization, we can use
 388             // XtAddExposureToRegion to expand the window's paint region.
 389
 390             if (win)
 391             {
 392                 wxSize sz = win->GetSize();
 393                 wxSizeEvent sizeEvent(sz, win->GetId());
 394                 sizeEvent.SetEventObject(win);
 395
 396                 win->GetEventHandler()->ProcessEvent( sizeEvent );
 397             }
 398
 399             return;
 400         }
 401         case Expose:
 402         {
 403             if (win)
 404             {
 405                 win->GetUpdateRegion().Union( event->xexpose.x, event->xexpose.y,
 406                                               event->xexpose.width, event->xexpose.height);
 407                 if (event->xexpose.count == 0)
 408                 {
 409                     win->X11SendPaintEvents();  // TODO let an idle handler do that
 410                 }
 411             }
 412
 413             return;
 414         }
 415         case EnterNotify:
 416         case LeaveNotify:
 417         case ButtonPress:
 418         case ButtonRelease:
 419         case MotionNotify:
 420         {
 421             if (win && !win->IsEnabled())
 422                 return;
 423
 424             if (win)
 425             {
 426                 wxMouseEvent wxevent;
 427                 wxTranslateMouseEvent(wxevent, win, window, event);
 428                 win->GetEventHandler()->ProcessEvent( wxevent );
 429             }
 430             return;
 431         }
 432         case FocusIn:
 433             {
 434                 if (win && event->xfocus.detail != NotifyPointer)
 435                 {
 436                     wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 437                     focusEvent.SetEventObject(win);
 438                     win->GetEventHandler()->ProcessEvent(focusEvent);
 439                 }
 440                 break;
 441             }
 442         case FocusOut:
 443             {
 444                 if (win && event->xfocus.detail != NotifyPointer)
 445                 {
 446                     wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 447                     focusEvent.SetEventObject(win);
 448                     win->GetEventHandler()->ProcessEvent(focusEvent);
 449                 }
 450                 break;
 451             }
 452         case DestroyNotify:
 453             {
 454                 // Do we want to process this (for top-level windows)?
 455                 // But we want to be able to veto closes, anyway
 456                 break;
 457             }
 458         default:
 459         {
 460             break;
 461         }
 462     }
 463 }
 464
 465 // Returns TRUE if more time is needed.
 466 // Note that this duplicates wxEventLoopImpl::SendIdleEvent
 467 // but ProcessIdle may be needed by apps, so is kept.
 468 bool wxApp::ProcessIdle()
 469 {
 470     wxIdleEvent event;
 471     event.SetEventObject(this);
 472     ProcessEvent(event);
 473
 474     return event.MoreRequested();
 475 }
 476
 477 void wxApp::ExitMainLoop()
 478 {
 479     if (m_mainLoop)
 480         m_mainLoop->Exit(0);
 481 }
 482
 483 // Is a message/event pending?
 484 bool wxApp::Pending()
 485 {
 486     return wxEventLoop::GetActive()->Pending();
 487 }
 488
 489 // Dispatch a message.
 490 void wxApp::Dispatch()
 491 {
 492     wxEventLoop::GetActive()->Dispatch();
 493 }
 494
 495 // This should be redefined in a derived class for
 496 // handling property change events for XAtom IPC.
 497 void wxApp::HandlePropertyChange(WXEvent *event)
 498 {
 499     // by default do nothing special
 500     // TODO: what to do for X11
 501     // XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 502 }
 503
 504 void wxApp::OnIdle(wxIdleEvent& event)
 505 {
 506     static bool inOnIdle = FALSE;
 507
 508     // Avoid recursion (via ProcessEvent default case)
 509     if (inOnIdle)
 510         return;
 511
 512     inOnIdle = TRUE;
 513
 514     // If there are pending events, we must process them: pending events
 515     // are either events to the threads other than main or events posted
 516     // with wxPostEvent() functions
 517     // GRG: I have moved this here so that all pending events are processed
 518     //   before starting to delete any objects. This behaves better (in
 519     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 520     //   behaviour. Also removed the '#if wxUSE_THREADS' around it.
 521     //  Changed Mar/2000 before 2.1.14
 522
 523     // Flush pending events.
 524     ProcessPendingEvents();
 525
 526     // 'Garbage' collection of windows deleted with Close().
 527     DeletePendingObjects();
 528
 529     // flush the logged messages if any
 530     wxLog *pLog = wxLog::GetActiveTarget();
 531     if ( pLog != NULL && pLog->HasPendingMessages() )
 532         pLog->Flush();
 533
 534     // Send OnIdle events to all windows
 535     bool needMore = SendIdleEvents();
 536
 537     if (needMore)
 538         event.RequestMore(TRUE);
 539
 540     inOnIdle = FALSE;
 541 }
 542
 543 void wxWakeUpIdle()
 544 {
 545     // **** please implement me! ****
 546     // Wake up the idle handler processor, even if it is in another thread...
 547 }
 548
 549
 550 // Send idle event to all top-level windows
 551 bool wxApp::SendIdleEvents()
 552 {
 553     bool needMore = FALSE;
 554
 555     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 556     while (node)
 557     {
 558         wxWindow* win = node->GetData();
 559         if (SendIdleEvents(win))
 560             needMore = TRUE;
 561         node = node->GetNext();
 562     }
 563
 564     return needMore;
 565 }
 566
 567 // Send idle event to window and all subwindows
 568 bool wxApp::SendIdleEvents(wxWindow* win)
 569 {
 570     bool needMore = FALSE;
 571
 572     wxIdleEvent event;
 573     event.SetEventObject(win);
 574     win->ProcessEvent(event);
 575
 576     if (event.MoreRequested())
 577         needMore = TRUE;
 578
 579     wxNode* node = win->GetChildren().First();
 580     while (node)
 581     {
 582         wxWindow* win = (wxWindow*) node->Data();
 583         if (SendIdleEvents(win))
 584             needMore = TRUE;
 585
 586         node = node->Next();
 587     }
 588     return needMore ;
 589 }
 590
 591 void wxApp::DeletePendingObjects()
 592 {
 593     wxNode *node = wxPendingDelete.First();
 594     while (node)
 595     {
 596         wxObject *obj = (wxObject *)node->Data();
 597
 598         delete obj;
 599
 600         if (wxPendingDelete.Member(obj))
 601             delete node;
 602
 603         // Deleting one object may have deleted other pending
 604         // objects, so start from beginning of list again.
 605         node = wxPendingDelete.First();
 606     }
 607 }
 608
 609 // Create an application context
 610 bool wxApp::OnInitGui()
 611 {
 612     // TODO: parse argv and get display to pass to XOpenDisplay
 613     Display* dpy = XOpenDisplay(NULL);
 614     m_initialDisplay = (WXDisplay*) dpy;
 615
 616     if (!dpy) {
 617         wxString className(wxTheApp->GetClassName());
 618         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 619             (const char*) className);
 620         exit(-1);
 621     }
 622     XSelectInput((Display*) m_initialDisplay,
 623         XDefaultRootWindow((Display*) m_initialDisplay),
 624         PropertyChangeMask);
 625
 626 #ifdef __WXDEBUG__
 627     // install the X error handler
 628     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 629 #endif // __WXDEBUG__
 630
 631     GetMainColormap(dpy);
 632     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 633
 634     return TRUE;
 635 }
 636
 637 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 638 {
 639     if (!display) /* Must be called first with non-NULL display */
 640         return m_mainColormap;
 641
 642     int defaultScreen = DefaultScreen((Display*) display);
 643     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 644
 645     Colormap c = DefaultColormapOfScreen(screen);
 646
 647     if (!m_mainColormap)
 648         m_mainColormap = (WXColormap) c;
 649
 650     return (WXColormap) c;
 651 }
 652
 653 Window wxGetParentWindow(Window window)
 654 {
 655     Window parent, root = 0;
 656     unsigned int noChildren = 0;
 657     if (XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 658         NULL, & noChildren))
 659         return parent;
 660     else
 661         return (Window) 0;
 662 }
 663
 664 // Returns TRUE if an accelerator has been processed
 665 bool wxApp::CheckForAccelerator(WXEvent* event)
 666 {
 667     XEvent* xEvent = (XEvent*) event;
 668     if (xEvent->xany.type == KeyPress)
 669     {
 670         // Find a wxWindow for this window
 671         // TODO: should get display for the window, not the current display
 672         Window window = xEvent->xany.window;
 673         wxWindow* win = NULL;
 674
 675         // Find the first wxWindow that corresponds to this event window
 676         while (window && !(win = wxGetWindowFromTable(window)))
 677             window = wxGetWindowParent(window);
 678
 679         if (!window || !win)
 680             return FALSE;
 681
 682         wxKeyEvent keyEvent(wxEVT_CHAR);
 683         wxTranslateKeyEvent(keyEvent, win, (Window) 0, xEvent);
 684
 685         // Now we have a wxKeyEvent and we have a wxWindow.
 686         // Go up the hierarchy until we find a matching accelerator,
 687         // or we get to the top.
 688         while (win)
 689         {
 690             if (win->ProcessAccelerator(keyEvent))
 691                 return TRUE;
 692             win = win->GetParent();
 693         }
 694         return FALSE;
 695     }
 696     return FALSE;
 697 }
 698
 699 void wxExit()
 700 {
 701     int retValue = 0;
 702     if (wxTheApp)
 703         retValue = wxTheApp->OnExit();
 704
 705     wxApp::CleanUp();
 706     /*
 707     * Exit in some platform-specific way. Not recommended that the app calls this:
 708     * only for emergencies.
 709     */
 710     exit(retValue);
 711 }
 712
 713 // Yield to other processes
 714
 715 bool wxApp::Yield(bool onlyIfNeeded)
 716 {
 717     bool s_inYield = FALSE;
 718
 719     if ( s_inYield )
 720     {
 721         if ( !onlyIfNeeded )
 722         {
 723             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 724         }
 725
 726         return FALSE;
 727     }
 728
 729     s_inYield = TRUE;
 730
 731     while (wxTheApp && wxTheApp->Pending())
 732         wxTheApp->Dispatch();
 733
 734     s_inYield = FALSE;
 735
 736     return TRUE;
 737 }
 738
 739 // TODO use XmGetPixmap (?) to get the really standard icons!
 740
 741 // XPM hack: make the arrays const
 742 #define static static const
 743
 744 #include "wx/generic/info.xpm"
 745 #include "wx/generic/error.xpm"
 746 #include "wx/generic/question.xpm"
 747 #include "wx/generic/warning.xpm"
 748
 749 #undef static
 750
 751 wxIcon
 752 wxApp::GetStdIcon(int which) const
 753 {
 754     switch(which)
 755     {
 756         case wxICON_INFORMATION:
 757             return wxIcon(info_xpm);
 758
 759         case wxICON_QUESTION:
 760             return wxIcon(question_xpm);
 761
 762         case wxICON_EXCLAMATION:
 763             return wxIcon(warning_xpm);
 764
 765         default:
 766             wxFAIL_MSG("requested non existent standard icon");
 767             // still fall through
 768
 769         case wxICON_HAND:
 770             return wxIcon(error_xpm);
 771     }
 772 }
 773
 774 // ----------------------------------------------------------------------------
 775 // accessors for C modules
 776 // ----------------------------------------------------------------------------
 777
 778 #if 0
 779 extern "C" XtAppContext wxGetAppContext()
 780 {
 781     return (XtAppContext)wxTheApp->GetAppContext();
 782 }
 783 #endif