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 #endif
  15
  16 #ifdef __VMS
  17 #define XtParent XTPARENT
  18 #define XtDisplay XTDISPLAY
  19 #endif
  20
  21 #include "wx/frame.h"
  22 #include "wx/app.h"
  23 #include "wx/utils.h"
  24 #include "wx/gdicmn.h"
  25 #include "wx/pen.h"
  26 #include "wx/brush.h"
  27 #include "wx/cursor.h"
  28 #include "wx/icon.h"
  29 #include "wx/palette.h"
  30 #include "wx/dc.h"
  31 #include "wx/dialog.h"
  32 #include "wx/msgdlg.h"
  33 #include "wx/log.h"
  34 #include "wx/module.h"
  35 #include "wx/memory.h"
  36 #include "wx/log.h"
  37 #include "wx/intl.h"
  38
  39 #if wxUSE_THREADS
  40     #include "wx/thread.h"
  41 #endif
  42
  43 #if wxUSE_WX_RESOURCES
  44     #include "wx/resource.h"
  45 #endif
  46
  47 #ifdef __VMS__
  48 #pragma message disable nosimpint
  49 #endif
  50 #include <Xm/Xm.h>
  51 #include <X11/Xlib.h>
  52 #include <X11/Xutil.h>
  53 #include <X11/Xresource.h>
  54 #include <X11/Xatom.h>
  55 #ifdef __VMS__
  56 #pragma message enable nosimpint
  57 #endif
  58
  59 #include "wx/motif/private.h"
  60
  61 #include <string.h>
  62
  63 extern char *wxBuffer;
  64 extern wxList wxPendingDelete;
  65
  66 wxApp *wxTheApp = NULL;
  67
  68 wxHashTable *wxWidgetHashTable = NULL;
  69
  70 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  71
  72 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  73     EVT_IDLE(wxApp::OnIdle)
  74 END_EVENT_TABLE()
  75
  76 #ifdef __WXDEBUG__
  77     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  78
  79     XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  80
  81     static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  82     {
  83         // just forward to the default handler for now
  84         return gs_pfnXErrorHandler(dpy, xevent);
  85     }
  86 #endif // __WXDEBUG__
  87
  88 long wxApp::sm_lastMessageTime = 0;
  89
  90 bool wxApp::Initialize()
  91 {
  92     wxBuffer = new char[BUFSIZ + 512];
  93
  94     wxClassInfo::InitializeClasses();
  95
  96     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  97     // create a module for that as it's part of the core.
  98 #if wxUSE_THREADS
  99     wxPendingEventsLocker = new wxCriticalSection();
 100 #endif
 101
 102     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 103     wxTheColourDatabase->Initialize();
 104
 105     wxInitializeStockLists();
 106     wxInitializeStockObjects();
 107
 108 #if wxUSE_WX_RESOURCES
 109     wxInitializeResourceSystem();
 110 #endif
 111
 112     // For PostScript printing
 113 #if wxUSE_POSTSCRIPT
 114     /* Done using wxModule now
 115     wxInitializePrintSetupData();
 116     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
 117     wxThePrintPaperDatabase->CreateDatabase();
 118     */
 119 #endif
 120
 121     wxBitmap::InitStandardHandlers();
 122
 123     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 124
 125     wxModule::RegisterModules();
 126     if (!wxModule::InitializeModules()) return FALSE;
 127
 128     return TRUE;
 129 }
 130
 131 void wxApp::CleanUp()
 132 {
 133     delete wxWidgetHashTable;
 134     wxWidgetHashTable = NULL;
 135
 136     wxModule::CleanUpModules();
 137
 138 #if wxUSE_WX_RESOURCES
 139     wxCleanUpResourceSystem();
 140 #endif
 141
 142     wxDeleteStockObjects() ;
 143
 144     // Destroy all GDI lists, etc.
 145
 146     wxDeleteStockLists();
 147
 148     delete wxTheColourDatabase;
 149     wxTheColourDatabase = NULL;
 150
 151 #if wxUSE_POSTSCRIPT
 152     /* Done using wxModule now
 153     wxInitializePrintSetupData(FALSE);
 154     delete wxThePrintPaperDatabase;
 155     wxThePrintPaperDatabase = NULL;
 156     */
 157 #endif
 158
 159     wxBitmap::CleanUpHandlers();
 160
 161     delete[] wxBuffer;
 162     wxBuffer = NULL;
 163
 164     wxClassInfo::CleanUpClasses();
 165
 166     delete wxTheApp;
 167     wxTheApp = NULL;
 168
 169     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 170     // create a module for that as it's part of the core.
 171 #if wxUSE_THREADS
 172     delete wxPendingEvents;
 173     delete wxPendingEventsLocker;
 174 #endif
 175
 176 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 177     // At this point we want to check if there are any memory
 178     // blocks that aren't part of the wxDebugContext itself,
 179     // as a special case. Then when dumping we need to ignore
 180     // wxDebugContext, too.
 181     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 182     {
 183         wxLogDebug("There were memory leaks.\n");
 184         wxDebugContext::Dump();
 185         wxDebugContext::PrintStatistics();
 186     }
 187 #endif
 188
 189     // do it as the very last thing because everything else can log messages
 190     wxLog::DontCreateOnDemand();
 191     // do it as the very last thing because everything else can log messages
 192     delete wxLog::SetActiveTarget(NULL);
 193 }
 194
 195 int wxEntry( int argc, char *argv[] )
 196 {
 197 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 198     // This seems to be necessary since there are 'rogue'
 199     // objects present at this point (perhaps global objects?)
 200     // Setting a checkpoint will ignore them as far as the
 201     // memory checking facility is concerned.
 202     // Of course you may argue that memory allocated in globals should be
 203     // checked, but this is a reasonable compromise.
 204     wxDebugContext::SetCheckpoint();
 205 #endif
 206
 207     if (!wxApp::Initialize())
 208         return FALSE;
 209
 210     if (!wxTheApp)
 211     {
 212         if (!wxApp::GetInitializerFunction())
 213         {
 214             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 215             return 0;
 216         };
 217
 218         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 219     };
 220
 221     if (!wxTheApp)
 222     {
 223         printf( "wxWindows error: wxTheApp == NULL\n" );
 224         return 0;
 225     };
 226
 227     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 228     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 229
 230     wxTheApp->argc = argc;
 231     wxTheApp->argv = argv;
 232
 233     // GUI-specific initialization, such as creating an app context.
 234     wxTheApp->OnInitGui();
 235
 236     // Here frames insert themselves automatically into wxTopLevelWindows by
 237     // getting created in OnInit().
 238
 239     int retValue = 0;
 240     if (wxTheApp->OnInit())
 241     {
 242         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 243     }
 244
 245     // flush the logged messages if any
 246     wxLog *pLog = wxLog::GetActiveTarget();
 247     if ( pLog != NULL && pLog->HasPendingMessages() )
 248         pLog->Flush();
 249
 250     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 251     // for further messages
 252
 253     if (wxTheApp->GetTopWindow())
 254     {
 255         delete wxTheApp->GetTopWindow();
 256         wxTheApp->SetTopWindow(NULL);
 257     }
 258
 259     wxTheApp->DeletePendingObjects();
 260
 261     wxTheApp->OnExit();
 262
 263     wxApp::CleanUp();
 264
 265     return retValue;
 266 };
 267
 268 // Static member initialization
 269 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 270
 271 wxApp::wxApp()
 272 {
 273     m_topWindow = NULL;
 274     wxTheApp = this;
 275     m_className = "";
 276     m_wantDebugOutput = TRUE ;
 277     m_appName = "";
 278     argc = 0;
 279     argv = NULL;
 280     m_exitOnFrameDelete = TRUE;
 281
 282     m_mainColormap = (WXColormap) NULL;
 283     m_appContext = (WXAppContext) NULL;
 284     m_topLevelWidget = (WXWidget) NULL;
 285     m_maxRequestSize = 0;
 286     m_initialDisplay = (WXDisplay*) 0;
 287 }
 288
 289 bool wxApp::Initialized()
 290 {
 291     if (GetTopWindow())
 292         return TRUE;
 293     else
 294         return FALSE;
 295 }
 296
 297 int wxApp::MainLoop()
 298 {
 299     m_keepGoing = TRUE;
 300
 301     /*
 302     * Sit around forever waiting to process X-events. Property Change
 303     * event are handled special, because they have to refer to
 304     * the root window rather than to a widget. therefore we can't
 305     * use an Xt-eventhandler.
 306     */
 307
 308     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 309         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 310         PropertyChangeMask);
 311
 312     XEvent event;
 313
 314     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 315     while (m_keepGoing)
 316     {
 317         XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 318
 319         ProcessXEvent((WXEvent*) & event);
 320
 321         if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 322         {
 323             if (!ProcessIdle())
 324             {
 325 #if wxUSE_THREADS
 326                 // leave the main loop to give other threads a chance to
 327                 // perform their GUI work
 328                 wxMutexGuiLeave();
 329                 wxUsleep(20);
 330                 wxMutexGuiEnter();
 331 #endif
 332             }
 333         }
 334
 335     }
 336
 337     return 0;
 338 }
 339
 340 // Processes an X event.
 341 void wxApp::ProcessXEvent(WXEvent* _event)
 342 {
 343     XEvent* event = (XEvent*) _event;
 344
 345     if (event->type == KeyPress)
 346     {
 347 #if 0 // def __WXDEBUG__
 348         Widget widget = XtWindowToWidget(event->xany.display, event->xany.window);
 349         wxLogDebug("Got key press event for 0x%08x (parent = 0x%08x)",
 350                    widget, XtParent(widget));
 351 #endif // DEBUG
 352
 353     if (CheckForAccelerator(_event))
 354     {
 355             // Do nothing! We intercepted and processed the event as an
 356             // accelerator.
 357             return;
 358     }
 359 #if 1
 360         // It seemed before that this hack was redundant and
 361         // key down events were being generated by wxCanvasInputEvent.
 362         // But no longer - why ???
 363         //
 364     else if (CheckForKeyDown(_event))
 365     {
 366             // We intercepted and processed the key down event
 367             return;
 368     }
 369 #endif
 370     else
 371     {
 372             XtDispatchEvent(event);
 373         return;
 374     }
 375     }
 376     else if (event->type == KeyRelease)
 377     {
 378         // TODO: work out why we still need this !  -michael
 379         //
 380         if (CheckForKeyUp(_event))
 381     {
 382         // We intercepted and processed the key up event
 383         return;
 384     }
 385     else
 386     {
 387         XtDispatchEvent(event);
 388         return;
 389     }
 390     }
 391     else if (event->type == PropertyNotify)
 392     {
 393         HandlePropertyChange(_event);
 394         return;
 395     }
 396     else if (event->type == ResizeRequest)
 397     {
 398         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 399          * If resize event, don't resize until the last resize event for this
 400          * window is recieved. Prevents flicker as windows are resized.
 401          */
 402
 403         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 404         Window win = event->xany.window;
 405         XEvent report;
 406
 407         //  to avoid flicker
 408         report = * event;
 409         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 410
 411         // TODO: when implementing refresh optimization, we can use
 412         // XtAddExposureToRegion to expand the window's paint region.
 413
 414         XtDispatchEvent(event);
 415     }
 416     else
 417     {
 418         XtDispatchEvent(event);
 419     }
 420 }
 421
 422 // Returns TRUE if more time is needed.
 423 bool wxApp::ProcessIdle()
 424 {
 425     wxIdleEvent event;
 426     event.SetEventObject(this);
 427     ProcessEvent(event);
 428
 429     return event.MoreRequested();
 430 }
 431
 432 void wxApp::ExitMainLoop()
 433 {
 434     m_keepGoing = FALSE;
 435 }
 436
 437 // Is a message/event pending?
 438 bool wxApp::Pending()
 439 {
 440     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 441
 442     // Fix by Doug from STI, to prevent a stall if non-X event
 443     // is found.
 444     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 445 }
 446
 447 // Dispatch a message.
 448 void wxApp::Dispatch()
 449 {
 450     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 451
 452     XEvent event;
 453     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 454     ProcessXEvent((WXEvent*) & event);
 455 }
 456
 457 // This should be redefined in a derived class for
 458 // handling property change events for XAtom IPC.
 459 void wxApp::HandlePropertyChange(WXEvent *event)
 460 {
 461     // by default do nothing special
 462     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 463 }
 464
 465 void wxApp::OnIdle(wxIdleEvent& event)
 466 {
 467     static bool inOnIdle = FALSE;
 468
 469     // Avoid recursion (via ProcessEvent default case)
 470     if (inOnIdle)
 471         return;
 472
 473     inOnIdle = TRUE;
 474
 475     // If there are pending events, we must process them: pending events
 476     // are either events to the threads other than main or events posted
 477     // with wxPostEvent() functions
 478     // GRG: I have moved this here so that all pending events are processed
 479     //   before starting to delete any objects. This behaves better (in
 480     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 481     //   behaviour. Also removed the '#if wxUSE_THREADS' around it.
 482     //  Changed Mar/2000 before 2.1.14
 483
 484     // Flush pending events.
 485     ProcessPendingEvents();
 486
 487     // 'Garbage' collection of windows deleted with Close().
 488     DeletePendingObjects();
 489
 490     // flush the logged messages if any
 491     wxLog *pLog = wxLog::GetActiveTarget();
 492     if ( pLog != NULL && pLog->HasPendingMessages() )
 493         pLog->Flush();
 494
 495     // Send OnIdle events to all windows
 496     bool needMore = SendIdleEvents();
 497
 498     if (needMore)
 499         event.RequestMore(TRUE);
 500
 501     inOnIdle = FALSE;
 502 }
 503
 504 void wxWakeUpIdle()
 505 {
 506     // **** please implement me! ****
 507     // Wake up the idle handler processor, even if it is in another thread...
 508 }
 509
 510
 511 // Send idle event to all top-level windows
 512 bool wxApp::SendIdleEvents()
 513 {
 514     bool needMore = FALSE;
 515
 516     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 517     while (node)
 518     {
 519         wxWindow* win = node->GetData();
 520         if (SendIdleEvents(win))
 521             needMore = TRUE;
 522         node = node->GetNext();
 523     }
 524
 525     return needMore;
 526 }
 527
 528 // Send idle event to window and all subwindows
 529 bool wxApp::SendIdleEvents(wxWindow* win)
 530 {
 531     bool needMore = FALSE;
 532
 533     wxIdleEvent event;
 534     event.SetEventObject(win);
 535     win->ProcessEvent(event);
 536
 537     if (event.MoreRequested())
 538         needMore = TRUE;
 539
 540     wxNode* node = win->GetChildren().First();
 541     while (node)
 542     {
 543         wxWindow* win = (wxWindow*) node->Data();
 544         if (SendIdleEvents(win))
 545             needMore = TRUE;
 546
 547         node = node->Next();
 548     }
 549     return needMore ;
 550 }
 551
 552 void wxApp::DeletePendingObjects()
 553 {
 554     wxNode *node = wxPendingDelete.First();
 555     while (node)
 556     {
 557         wxObject *obj = (wxObject *)node->Data();
 558
 559         delete obj;
 560
 561         if (wxPendingDelete.Member(obj))
 562             delete node;
 563
 564         // Deleting one object may have deleted other pending
 565         // objects, so start from beginning of list again.
 566         node = wxPendingDelete.First();
 567     }
 568 }
 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 #ifdef __WXDEBUG__
 593     // install the X error handler
 594     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 595 #endif // __WXDEBUG__
 596
 597     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 598         applicationShellWidgetClass,dpy,
 599         NULL,0) ;
 600
 601     // Add general resize proc
 602     XtActionsRec rec;
 603     rec.string = "resize";
 604     rec.proc = (XtActionProc)wxWidgetResizeProc;
 605     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 606
 607     GetMainColormap(dpy);
 608     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 609
 610     return TRUE;
 611 }
 612
 613 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 614 {
 615     if (!display) /* Must be called first with non-NULL display */
 616         return m_mainColormap;
 617
 618     int defaultScreen = DefaultScreen((Display*) display);
 619     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 620
 621     Colormap c = DefaultColormapOfScreen(screen);
 622
 623     if (!m_mainColormap)
 624         m_mainColormap = (WXColormap) c;
 625
 626     return (WXColormap) c;
 627 }
 628
 629 // Returns TRUE if an accelerator has been processed
 630 bool wxApp::CheckForAccelerator(WXEvent* event)
 631 {
 632     XEvent* xEvent = (XEvent*) event;
 633     if (xEvent->xany.type == KeyPress)
 634     {
 635         // Find a wxWindow for this window
 636         // TODO: should get display for the window, not the current display
 637         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 638         wxWindow* win = NULL;
 639
 640         // Find the first wxWindow that corresponds to this event window
 641         while (widget && !(win = wxGetWindowFromTable(widget)))
 642             widget = XtParent(widget);
 643
 644         if (!widget || !win)
 645             return FALSE;
 646
 647         wxKeyEvent keyEvent(wxEVT_CHAR);
 648         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 649
 650         // Now we have a wxKeyEvent and we have a wxWindow.
 651         // Go up the hierarchy until we find a matching accelerator,
 652         // or we get to the top.
 653         while (win)
 654         {
 655             if (win->ProcessAccelerator(keyEvent))
 656                 return TRUE;
 657             win = win->GetParent();
 658         }
 659         return FALSE;
 660     }
 661     return FALSE;
 662 }
 663
 664 bool wxApp::CheckForKeyDown(WXEvent* event)
 665 {
 666     XEvent* xEvent = (XEvent*) event;
 667     if (xEvent->xany.type == KeyPress)
 668     {
 669         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 670                      xEvent->xany.window);
 671     wxWindow* win = NULL;
 672
 673     // Find the first wxWindow that corresponds to this event window
 674     while (widget && !(win = wxGetWindowFromTable(widget)))
 675             widget = XtParent(widget);
 676
 677     if (!widget || !win)
 678             return FALSE;
 679
 680     wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 681     wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 682
 683     return win->ProcessEvent( keyEvent );
 684     }
 685
 686     return FALSE;
 687 }
 688
 689 bool wxApp::CheckForKeyUp(WXEvent* event)
 690 {
 691     XEvent* xEvent = (XEvent*) event;
 692     if (xEvent->xany.type == KeyRelease)
 693     {
 694         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 695                          xEvent->xany.window);
 696         wxWindow* win = NULL;
 697
 698         // Find the first wxWindow that corresponds to this event window
 699         while (widget && !(win = wxGetWindowFromTable(widget)))
 700                 widget = XtParent(widget);
 701
 702         if (!widget || !win)
 703                 return FALSE;
 704
 705         wxKeyEvent keyEvent(wxEVT_KEY_UP);
 706         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 707
 708         return win->ProcessEvent( keyEvent );
 709     }
 710
 711     return FALSE;
 712 }
 713
 714 void wxExit()
 715 {
 716     int retValue = 0;
 717     if (wxTheApp)
 718         retValue = wxTheApp->OnExit();
 719
 720     wxApp::CleanUp();
 721     /*
 722     * Exit in some platform-specific way. Not recommended that the app calls this:
 723     * only for emergencies.
 724     */
 725     exit(retValue);
 726 }
 727
 728 // Yield to other processes
 729
 730 bool wxApp::Yield(bool onlyIfNeeded)
 731 {
 732     bool s_inYield = FALSE;
 733
 734     if ( s_inYield )
 735     {
 736         if ( !onlyIfNeeded )
 737         {
 738             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 739         }
 740
 741         return FALSE;
 742     }
 743
 744     s_inYield = TRUE;
 745
 746     while (wxTheApp && wxTheApp->Pending())
 747         wxTheApp->Dispatch();
 748
 749     s_inYield = FALSE;
 750
 751     return TRUE;
 752 }
 753
 754 // TODO use XmGetPixmap (?) to get the really standard icons!
 755
 756 #include "wx/generic/info.xpm"
 757 #include "wx/generic/error.xpm"
 758 #include "wx/generic/question.xpm"
 759 #include "wx/generic/warning.xpm"
 760
 761 wxIcon
 762 wxApp::GetStdIcon(int which) const
 763 {
 764     switch(which)
 765     {
 766         case wxICON_INFORMATION:
 767             return wxIcon(info_xpm);
 768
 769         case wxICON_QUESTION:
 770             return wxIcon(question_xpm);
 771
 772         case wxICON_EXCLAMATION:
 773             return wxIcon(warning_xpm);
 774
 775         default:
 776             wxFAIL_MSG("requested non existent standard icon");
 777             // still fall through
 778
 779         case wxICON_HAND:
 780             return wxIcon(error_xpm);
 781     }
 782 }
 783
 784 // ----------------------------------------------------------------------------
 785 // accessors for C modules
 786 // ----------------------------------------------------------------------------
 787
 788 extern "C" XtAppContext wxGetAppContext()
 789 {
 790     return (XtAppContext)wxTheApp->GetAppContext();
 791 }