src/motif/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     #pragma implementation "appbase.h"
  15 #endif
  16
  17 #include "wx/frame.h"
  18 #include "wx/app.h"
  19 #include "wx/utils.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/pen.h"
  22 #include "wx/brush.h"
  23 #include "wx/cursor.h"
  24 #include "wx/icon.h"
  25 #include "wx/palette.h"
  26 #include "wx/dc.h"
  27 #include "wx/dialog.h"
  28 #include "wx/msgdlg.h"
  29 #include "wx/log.h"
  30 #include "wx/module.h"
  31 #include "wx/memory.h"
  32 #include "wx/log.h"
  33 #include "wx/intl.h"
  34
  35 #if wxUSE_THREADS
  36     #include "wx/thread.h"
  37 #endif
  38
  39 #if wxUSE_WX_RESOURCES
  40     #include "wx/resource.h"
  41 #endif
  42
  43 #include <Xm/Xm.h>
  44 #include <X11/Xlib.h>
  45 #include <X11/Xutil.h>
  46 #include <X11/Xresource.h>
  47 #include <X11/Xatom.h>
  48
  49 #include "wx/motif/private.h"
  50
  51 #include <string.h>
  52
  53 extern char *wxBuffer;
  54 extern wxList wxPendingDelete;
  55
  56 #if wxUSE_THREADS
  57 extern wxList *wxPendingEvents;
  58 extern wxCriticalSection *wxPendingEventsLocker;
  59 #endif // wxUSE_THREADS
  60
  61 wxApp *wxTheApp = NULL;
  62
  63 wxHashTable *wxWidgetHashTable = NULL;
  64
  65 #if !USE_SHARED_LIBRARY
  66 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  67
  68 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  69     EVT_IDLE(wxApp::OnIdle)
  70 END_EVENT_TABLE()
  71 #endif
  72
  73 long wxApp::sm_lastMessageTime = 0;
  74
  75 bool wxApp::Initialize()
  76 {
  77     wxBuffer = new char[BUFSIZ + 512];
  78
  79     wxClassInfo::InitializeClasses();
  80
  81     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  82     // create a module for that as it's part of the core.
  83 #if wxUSE_THREADS
  84     wxPendingEvents = new wxList();
  85     wxPendingEventsLocker = new wxCriticalSection();
  86 #endif
  87
  88     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  89     wxTheColourDatabase->Initialize();
  90
  91     wxInitializeStockLists();
  92     wxInitializeStockObjects();
  93
  94 #if wxUSE_WX_RESOURCES
  95     wxInitializeResourceSystem();
  96 #endif
  97
  98     // For PostScript printing
  99 #if wxUSE_POSTSCRIPT
 100     /* Done using wxModule now
 101     wxInitializePrintSetupData();
 102     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
 103     wxThePrintPaperDatabase->CreateDatabase();
 104     */
 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     delete wxTheBrushList;
 133     wxTheBrushList = NULL;
 134
 135     delete wxThePenList;
 136     wxThePenList = NULL;
 137
 138     delete wxTheFontList;
 139     wxTheFontList = NULL;
 140
 141     delete wxTheBitmapList;
 142     wxTheBitmapList = NULL;
 143
 144     delete wxTheColourDatabase;
 145     wxTheColourDatabase = NULL;
 146
 147 #if wxUSE_POSTSCRIPT
 148     /* Done using wxModule now
 149     wxInitializePrintSetupData(FALSE);
 150     delete wxThePrintPaperDatabase;
 151     wxThePrintPaperDatabase = NULL;
 152     */
 153 #endif
 154
 155     wxBitmap::CleanUpHandlers();
 156
 157     delete[] wxBuffer;
 158     wxBuffer = NULL;
 159
 160     wxClassInfo::CleanUpClasses();
 161
 162     delete wxTheApp;
 163     wxTheApp = NULL;
 164
 165     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 166     // create a module for that as it's part of the core.
 167 #if wxUSE_THREADS
 168     delete wxPendingEvents;
 169     delete wxPendingEventsLocker;
 170 #endif
 171
 172 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 173     // At this point we want to check if there are any memory
 174     // blocks that aren't part of the wxDebugContext itself,
 175     // as a special case. Then when dumping we need to ignore
 176     // wxDebugContext, too.
 177     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 178     {
 179         wxLogDebug("There were memory leaks.\n");
 180         wxDebugContext::Dump();
 181         wxDebugContext::PrintStatistics();
 182     }
 183 #endif
 184
 185     // do it as the very last thing because everything else can log messages
 186     wxLog::DontCreateOnDemand();
 187     // do it as the very last thing because everything else can log messages
 188     delete wxLog::SetActiveTarget(NULL);
 189 }
 190
 191 int wxEntry( int argc, char *argv[] )
 192 {
 193 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 194     // This seems to be necessary since there are 'rogue'
 195     // objects present at this point (perhaps global objects?)
 196     // Setting a checkpoint will ignore them as far as the
 197     // memory checking facility is concerned.
 198     // Of course you may argue that memory allocated in globals should be
 199     // checked, but this is a reasonable compromise.
 200     wxDebugContext::SetCheckpoint();
 201 #endif
 202
 203     if (!wxApp::Initialize())
 204         return FALSE;
 205
 206     if (!wxTheApp)
 207     {
 208         if (!wxApp::GetInitializerFunction())
 209         {
 210             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 211             return 0;
 212         };
 213
 214         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 215     };
 216
 217     if (!wxTheApp)
 218     {
 219         printf( "wxWindows error: wxTheApp == NULL\n" );
 220         return 0;
 221     };
 222
 223     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 224     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 225
 226     wxTheApp->argc = argc;
 227     wxTheApp->argv = argv;
 228
 229     // GUI-specific initialization, such as creating an app context.
 230     wxTheApp->OnInitGui();
 231
 232     // Here frames insert themselves automatically into wxTopLevelWindows by
 233     // getting created in OnInit().
 234
 235     int retValue = 0;
 236     if (wxTheApp->OnInit())
 237     {
 238         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 239     }
 240
 241     // flush the logged messages if any
 242     wxLog *pLog = wxLog::GetActiveTarget();
 243     if ( pLog != NULL && pLog->HasPendingMessages() )
 244         pLog->Flush();
 245
 246     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 247     // for further messages
 248
 249     if (wxTheApp->GetTopWindow())
 250     {
 251         delete wxTheApp->GetTopWindow();
 252         wxTheApp->SetTopWindow(NULL);
 253     }
 254
 255     wxTheApp->DeletePendingObjects();
 256
 257     wxTheApp->OnExit();
 258
 259     wxApp::CleanUp();
 260
 261     return retValue;
 262 };
 263
 264 // Static member initialization
 265 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 266
 267 wxApp::wxApp()
 268 {
 269     m_topWindow = NULL;
 270     wxTheApp = this;
 271     m_className = "";
 272     m_wantDebugOutput = TRUE ;
 273     m_appName = "";
 274     argc = 0;
 275     argv = NULL;
 276     m_exitOnFrameDelete = TRUE;
 277
 278     m_mainColormap = (WXColormap) NULL;
 279     m_appContext = (WXAppContext) NULL;
 280     m_topLevelWidget = (WXWidget) NULL;
 281     m_maxRequestSize = 0;
 282     m_initialDisplay = (WXDisplay*) 0;
 283 }
 284
 285 bool wxApp::Initialized()
 286 {
 287     if (GetTopWindow())
 288         return TRUE;
 289     else
 290         return FALSE;
 291 }
 292
 293 int wxApp::MainLoop()
 294 {
 295     m_keepGoing = TRUE;
 296
 297     /*
 298     * Sit around forever waiting to process X-events. Property Change
 299     * event are handled special, because they have to refer to
 300     * the root window rather than to a widget. therefore we can't
 301     * use an Xt-eventhandler.
 302     */
 303
 304     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 305         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 306         PropertyChangeMask);
 307
 308     XEvent event;
 309
 310     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 311     while (m_keepGoing)
 312     {
 313         XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 314
 315         ProcessXEvent((WXEvent*) & event);
 316
 317         if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 318         {
 319             if (!ProcessIdle())
 320             {
 321 #if wxUSE_THREADS
 322                 // leave the main loop to give other threads a chance to
 323                 // perform their GUI work
 324                 wxMutexGuiLeave();
 325                 wxUsleep(20);
 326                 wxMutexGuiEnter();
 327 #endif
 328             }
 329         }
 330
 331     }
 332
 333     return 0;
 334 }
 335
 336 // Processes an X event.
 337 void wxApp::ProcessXEvent(WXEvent* _event)
 338 {
 339     XEvent* event = (XEvent*) _event;
 340
 341     if (event->type == KeyPress)
 342     {
 343 #ifdef __WXDEBUG__
 344         Widget widget = XtWindowToWidget(event->xany.display, event->xany.window);
 345         wxLogDebug("Got key press event for 0x%08x (parent = 0x%08x)",
 346                    widget, XtParent(widget));
 347 #endif // DEBUG
 348
 349         if (CheckForAccelerator(_event))
 350         {
 351             // Do nothing! We intercepted and processed the event as an
 352             // accelerator.
 353             return;
 354         }
 355 #if 1
 356         // It seemed before that this hack was redundant and
 357         // key down events were being generated by wxCanvasInputEvent.
 358         // But no longer - why ???
 359         //
 360         else if (CheckForKeyDown(_event))
 361         {
 362             // We intercepted and processed the key down event
 363             return;
 364         }
 365 #endif
 366         else
 367         {
 368             XtDispatchEvent(event);
 369             return;
 370         }
 371     }
 372     else if (event->type == KeyRelease)
 373     {
 374         // TODO: work out why we still need this !  -michael
 375         //
 376         if (CheckForKeyUp(_event))
 377         {
 378             // We intercepted and processed the key up event
 379             return;
 380         }
 381         else
 382         {
 383             XtDispatchEvent(event);
 384             return;
 385         }
 386     }
 387     else if (event->type == PropertyNotify)
 388     {
 389         HandlePropertyChange(_event);
 390         return;
 391     }
 392     else if (event->type == ResizeRequest)
 393     {
 394         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 395          * If resize event, don't resize until the last resize event for this
 396          * window is recieved. Prevents flicker as windows are resized.
 397          */
 398
 399         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 400         Window win = event->xany.window;
 401         XEvent report;
 402
 403         //  to avoid flicker
 404         report = * event;
 405         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 406
 407         // TODO: when implementing refresh optimization, we can use
 408         // XtAddExposureToRegion to expand the window's paint region.
 409
 410         XtDispatchEvent(event);
 411     }
 412     else
 413     {
 414         XtDispatchEvent(event);
 415     }
 416 }
 417
 418 // Returns TRUE if more time is needed.
 419 bool wxApp::ProcessIdle()
 420 {
 421     wxIdleEvent event;
 422     event.SetEventObject(this);
 423     ProcessEvent(event);
 424
 425     return event.MoreRequested();
 426 }
 427
 428 void wxApp::ExitMainLoop()
 429 {
 430     m_keepGoing = FALSE;
 431 }
 432
 433 // Is a message/event pending?
 434 bool wxApp::Pending()
 435 {
 436     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 437
 438     // Fix by Doug from STI, to prevent a stall if non-X event
 439     // is found.
 440     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 441 }
 442
 443 // Dispatch a message.
 444 void wxApp::Dispatch()
 445 {
 446     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 447
 448     XEvent event;
 449     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 450     ProcessXEvent((WXEvent*) & event);
 451 }
 452
 453 // This should be redefined in a derived class for
 454 // handling property change events for XAtom IPC.
 455 void wxApp::HandlePropertyChange(WXEvent *event)
 456 {
 457     // by default do nothing special
 458     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 459 }
 460
 461 void wxApp::OnIdle(wxIdleEvent& event)
 462 {
 463     static bool inOnIdle = FALSE;
 464
 465     // Avoid recursion (via ProcessEvent default case)
 466     if (inOnIdle)
 467         return;
 468
 469     inOnIdle = TRUE;
 470
 471     // 'Garbage' collection of windows deleted with Close().
 472     DeletePendingObjects();
 473
 474 #if wxUSE_THREADS
 475     // Flush pending events.
 476     ProcessPendingEvents();
 477 #endif
 478
 479     // flush the logged messages if any
 480     wxLog *pLog = wxLog::GetActiveTarget();
 481     if ( pLog != NULL && pLog->HasPendingMessages() )
 482         pLog->Flush();
 483
 484     // Send OnIdle events to all windows
 485     bool needMore = SendIdleEvents();
 486
 487     if (needMore)
 488         event.RequestMore(TRUE);
 489
 490     inOnIdle = FALSE;
 491 }
 492
 493 // Send idle event to all top-level windows
 494 bool wxApp::SendIdleEvents()
 495 {
 496     bool needMore = FALSE;
 497
 498     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 499     while (node)
 500     {
 501         wxWindow* win = node->GetData();
 502         if (SendIdleEvents(win))
 503             needMore = TRUE;
 504         node = node->GetNext();
 505     }
 506
 507     return needMore;
 508 }
 509
 510 // Send idle event to window and all subwindows
 511 bool wxApp::SendIdleEvents(wxWindow* win)
 512 {
 513     bool needMore = FALSE;
 514
 515     wxIdleEvent event;
 516     event.SetEventObject(win);
 517     win->ProcessEvent(event);
 518
 519     if (event.MoreRequested())
 520         needMore = TRUE;
 521
 522     wxNode* node = win->GetChildren().First();
 523     while (node)
 524     {
 525         wxWindow* win = (wxWindow*) node->Data();
 526         if (SendIdleEvents(win))
 527             needMore = TRUE;
 528
 529         node = node->Next();
 530     }
 531     return needMore ;
 532 }
 533
 534 void wxApp::DeletePendingObjects()
 535 {
 536     wxNode *node = wxPendingDelete.First();
 537     while (node)
 538     {
 539         wxObject *obj = (wxObject *)node->Data();
 540
 541         delete obj;
 542
 543         if (wxPendingDelete.Member(obj))
 544             delete node;
 545
 546         // Deleting one object may have deleted other pending
 547         // objects, so start from beginning of list again.
 548         node = wxPendingDelete.First();
 549     }
 550 }
 551
 552 #if wxUSE_THREADS
 553 void wxApp::ProcessPendingEvents()
 554 {
 555     wxNode *node = wxPendingEvents->First();
 556     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 557
 558     while (node)
 559     {
 560         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 561
 562         handler->ProcessPendingEvents();
 563
 564         delete node;
 565         node = wxPendingEvents->First();
 566     }
 567 }
 568 #endif // wxUSE_THREADS
 569
 570 // Create an application context
 571 bool wxApp::OnInitGui()
 572 {
 573     XtToolkitInitialize() ;
 574     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 575     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 576         (const char*) wxTheApp->GetClassName(), NULL, 0,
 577 # if XtSpecificationRelease < 5
 578         (Cardinal*) &argc,
 579 # else
 580         &argc,
 581 # endif
 582         argv);
 583
 584     if (!dpy) {
 585         wxString className(wxTheApp->GetClassName());
 586         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 587                    (const char*) className);
 588         exit(-1);
 589     }
 590     m_initialDisplay = (WXDisplay*) dpy;
 591
 592     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 593         applicationShellWidgetClass,dpy,
 594         NULL,0) ;
 595
 596     // Add general resize proc
 597     XtActionsRec rec;
 598     rec.string = "resize";
 599     rec.proc = (XtActionProc)wxWidgetResizeProc;
 600     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 601
 602     GetMainColormap(dpy);
 603     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 604
 605     return TRUE;
 606 }
 607
 608 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 609 {
 610     if (!display) /* Must be called first with non-NULL display */
 611         return m_mainColormap;
 612
 613     int defaultScreen = DefaultScreen((Display*) display);
 614     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 615
 616     Colormap c = DefaultColormapOfScreen(screen);
 617
 618     if (!m_mainColormap)
 619         m_mainColormap = (WXColormap) c;
 620
 621     return (WXColormap) c;
 622 }
 623
 624 // Returns TRUE if an accelerator has been processed
 625 bool wxApp::CheckForAccelerator(WXEvent* event)
 626 {
 627     XEvent* xEvent = (XEvent*) event;
 628     if (xEvent->xany.type == KeyPress)
 629     {
 630         // Find a wxWindow for this window
 631         // TODO: should get display for the window, not the current display
 632         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 633         wxWindow* win = NULL;
 634
 635         // Find the first wxWindow that corresponds to this event window
 636         while (widget && !(win = wxGetWindowFromTable(widget)))
 637             widget = XtParent(widget);
 638
 639         if (!widget || !win)
 640             return FALSE;
 641
 642         wxKeyEvent keyEvent(wxEVT_CHAR);
 643         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 644
 645         // Now we have a wxKeyEvent and we have a wxWindow.
 646         // Go up the hierarchy until we find a matching accelerator,
 647         // or we get to the top.
 648         while (win)
 649         {
 650             if (win->ProcessAccelerator(keyEvent))
 651                 return TRUE;
 652             win = win->GetParent();
 653         }
 654         return FALSE;
 655     }
 656     return FALSE;
 657 }
 658
 659 bool wxApp::CheckForKeyDown(WXEvent* event)
 660 {
 661     XEvent* xEvent = (XEvent*) event;
 662     if (xEvent->xany.type == KeyPress)
 663     {
 664         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 665                                          xEvent->xany.window);
 666         wxWindow* win = NULL;
 667
 668         // Find the first wxWindow that corresponds to this event window
 669         while (widget && !(win = wxGetWindowFromTable(widget)))
 670             widget = XtParent(widget);
 671
 672         if (!widget || !win)
 673             return FALSE;
 674
 675         wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 676         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 677
 678         return win->ProcessEvent( keyEvent );
 679     }
 680
 681     return FALSE;
 682 }
 683
 684 bool wxApp::CheckForKeyUp(WXEvent* event)
 685 {
 686     XEvent* xEvent = (XEvent*) event;
 687     if (xEvent->xany.type == KeyRelease)
 688     {
 689         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 690                                          xEvent->xany.window);
 691         wxWindow* win = NULL;
 692
 693         // Find the first wxWindow that corresponds to this event window
 694         while (widget && !(win = wxGetWindowFromTable(widget)))
 695             widget = XtParent(widget);
 696
 697         if (!widget || !win)
 698             return FALSE;
 699
 700         wxKeyEvent keyEvent(wxEVT_KEY_UP);
 701         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 702
 703         return win->ProcessEvent( keyEvent );
 704     }
 705
 706     return FALSE;
 707 }
 708
 709 void wxExit()
 710 {
 711     int retValue = 0;
 712     if (wxTheApp)
 713         retValue = wxTheApp->OnExit();
 714
 715     wxApp::CleanUp();
 716     /*
 717     * Exit in some platform-specific way. Not recommended that the app calls this:
 718     * only for emergencies.
 719     */
 720     exit(retValue);
 721 }
 722
 723 // Yield to other processes
 724 bool wxYield()
 725 {
 726     while (wxTheApp && wxTheApp->Pending())
 727         wxTheApp->Dispatch();
 728
 729     // VZ: is it the same as this (taken from old wxExecute)?
 730 #if 0
 731     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 732 #endif
 733
 734     return TRUE;
 735 }
 736
 737 // TODO use XmGetPixmap (?) to get the really standard icons!
 738
 739 #include "wx/generic/info.xpm"
 740 #include "wx/generic/error.xpm"
 741 #include "wx/generic/question.xpm"
 742 #include "wx/generic/warning.xpm"
 743
 744 wxIcon
 745 wxApp::GetStdIcon(int which) const
 746 {
 747     switch(which)
 748     {
 749         case wxICON_INFORMATION:
 750             return wxIcon(info_xpm);
 751
 752         case wxICON_QUESTION:
 753             return wxIcon(question_xpm);
 754
 755         case wxICON_EXCLAMATION:
 756             return wxIcon(warning_xpm);
 757
 758         default:
 759             wxFAIL_MSG("requested non existent standard icon");
 760             // still fall through
 761
 762         case wxICON_HAND:
 763             return wxIcon(error_xpm);
 764     }
 765 }
 766
 767 // ----------------------------------------------------------------------------
 768 // accessors for C modules
 769 // ----------------------------------------------------------------------------
 770
 771 extern "C" XtAppContext wxGetAppContext()
 772 {
 773     return (XtAppContext)wxTheApp->GetAppContext();
 774 }