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 0 // this isn't necessary anymore ??? -michael
 356         else if (CheckForKeyDown(_event))
 357         {
 358             // We intercepted and processed the key down event
 359             return;
 360         }
 361 #endif
 362         else
 363         {
 364             XtDispatchEvent(event);
 365             return;
 366         }
 367     }
 368     else if (event->type == KeyRelease)
 369     {
 370         // TODO: work out why we still need this !  -michael
 371         //
 372         if (CheckForKeyUp(_event))
 373         {
 374             // We intercepted and processed the key up event
 375             return;
 376         }
 377         else
 378         {
 379             XtDispatchEvent(event);
 380             return;
 381         }
 382     }
 383     else if (event->type == PropertyNotify)
 384     {
 385         HandlePropertyChange(_event);
 386         return;
 387     }
 388     else if (event->type == ResizeRequest)
 389     {
 390         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 391          * If resize event, don't resize until the last resize event for this
 392          * window is recieved. Prevents flicker as windows are resized.
 393          */
 394
 395         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 396         Window win = event->xany.window;
 397         XEvent report;
 398
 399         //  to avoid flicker
 400         report = * event;
 401         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 402
 403         // TODO: when implementing refresh optimization, we can use
 404         // XtAddExposureToRegion to expand the window's paint region.
 405
 406         XtDispatchEvent(event);
 407     }
 408     else
 409     {
 410         XtDispatchEvent(event);
 411     }
 412 }
 413
 414 // Returns TRUE if more time is needed.
 415 bool wxApp::ProcessIdle()
 416 {
 417     wxIdleEvent event;
 418     event.SetEventObject(this);
 419     ProcessEvent(event);
 420
 421     return event.MoreRequested();
 422 }
 423
 424 void wxApp::ExitMainLoop()
 425 {
 426     m_keepGoing = FALSE;
 427 }
 428
 429 // Is a message/event pending?
 430 bool wxApp::Pending()
 431 {
 432     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 433
 434     // Fix by Doug from STI, to prevent a stall if non-X event
 435     // is found.
 436     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 437 }
 438
 439 // Dispatch a message.
 440 void wxApp::Dispatch()
 441 {
 442     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 443
 444     XEvent event;
 445     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 446     ProcessXEvent((WXEvent*) & event);
 447 }
 448
 449 // This should be redefined in a derived class for
 450 // handling property change events for XAtom IPC.
 451 void wxApp::HandlePropertyChange(WXEvent *event)
 452 {
 453     // by default do nothing special
 454     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 455 }
 456
 457 void wxApp::OnIdle(wxIdleEvent& event)
 458 {
 459     static bool inOnIdle = FALSE;
 460
 461     // Avoid recursion (via ProcessEvent default case)
 462     if (inOnIdle)
 463         return;
 464
 465     inOnIdle = TRUE;
 466
 467     // 'Garbage' collection of windows deleted with Close().
 468     DeletePendingObjects();
 469
 470 #if wxUSE_THREADS
 471     // Flush pending events.
 472     ProcessPendingEvents();
 473 #endif
 474
 475     // flush the logged messages if any
 476     wxLog *pLog = wxLog::GetActiveTarget();
 477     if ( pLog != NULL && pLog->HasPendingMessages() )
 478         pLog->Flush();
 479
 480     // Send OnIdle events to all windows
 481     bool needMore = SendIdleEvents();
 482
 483     if (needMore)
 484         event.RequestMore(TRUE);
 485
 486     inOnIdle = FALSE;
 487 }
 488
 489 // Send idle event to all top-level windows
 490 bool wxApp::SendIdleEvents()
 491 {
 492     bool needMore = FALSE;
 493
 494     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 495     while (node)
 496     {
 497         wxWindow* win = node->GetData();
 498         if (SendIdleEvents(win))
 499             needMore = TRUE;
 500         node = node->GetNext();
 501     }
 502
 503     return needMore;
 504 }
 505
 506 // Send idle event to window and all subwindows
 507 bool wxApp::SendIdleEvents(wxWindow* win)
 508 {
 509     bool needMore = FALSE;
 510
 511     wxIdleEvent event;
 512     event.SetEventObject(win);
 513     win->ProcessEvent(event);
 514
 515     if (event.MoreRequested())
 516         needMore = TRUE;
 517
 518     wxNode* node = win->GetChildren().First();
 519     while (node)
 520     {
 521         wxWindow* win = (wxWindow*) node->Data();
 522         if (SendIdleEvents(win))
 523             needMore = TRUE;
 524
 525         node = node->Next();
 526     }
 527     return needMore ;
 528 }
 529
 530 void wxApp::DeletePendingObjects()
 531 {
 532     wxNode *node = wxPendingDelete.First();
 533     while (node)
 534     {
 535         wxObject *obj = (wxObject *)node->Data();
 536
 537         delete obj;
 538
 539         if (wxPendingDelete.Member(obj))
 540             delete node;
 541
 542         // Deleting one object may have deleted other pending
 543         // objects, so start from beginning of list again.
 544         node = wxPendingDelete.First();
 545     }
 546 }
 547
 548 #if wxUSE_THREADS
 549 void wxApp::ProcessPendingEvents()
 550 {
 551     wxNode *node = wxPendingEvents->First();
 552     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 553
 554     while (node)
 555     {
 556         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 557
 558         handler->ProcessPendingEvents();
 559
 560         delete node;
 561         node = wxPendingEvents->First();
 562     }
 563 }
 564 #endif // wxUSE_THREADS
 565
 566 // Create an application context
 567 bool wxApp::OnInitGui()
 568 {
 569     XtToolkitInitialize() ;
 570     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 571     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 572         (const char*) wxTheApp->GetClassName(), NULL, 0,
 573 # if XtSpecificationRelease < 5
 574         (Cardinal*) &argc,
 575 # else
 576         &argc,
 577 # endif
 578         argv);
 579
 580     if (!dpy) {
 581         wxString className(wxTheApp->GetClassName());
 582         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 583                    (const char*) className);
 584         exit(-1);
 585     }
 586     m_initialDisplay = (WXDisplay*) dpy;
 587
 588     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 589         applicationShellWidgetClass,dpy,
 590         NULL,0) ;
 591
 592     // Add general resize proc
 593     XtActionsRec rec;
 594     rec.string = "resize";
 595     rec.proc = (XtActionProc)wxWidgetResizeProc;
 596     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 597
 598     GetMainColormap(dpy);
 599     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 600
 601     return TRUE;
 602 }
 603
 604 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 605 {
 606     if (!display) /* Must be called first with non-NULL display */
 607         return m_mainColormap;
 608
 609     int defaultScreen = DefaultScreen((Display*) display);
 610     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 611
 612     Colormap c = DefaultColormapOfScreen(screen);
 613
 614     if (!m_mainColormap)
 615         m_mainColormap = (WXColormap) c;
 616
 617     return (WXColormap) c;
 618 }
 619
 620 // Returns TRUE if an accelerator has been processed
 621 bool wxApp::CheckForAccelerator(WXEvent* event)
 622 {
 623     XEvent* xEvent = (XEvent*) event;
 624     if (xEvent->xany.type == KeyPress)
 625     {
 626         // Find a wxWindow for this window
 627         // TODO: should get display for the window, not the current display
 628         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 629         wxWindow* win = NULL;
 630
 631         // Find the first wxWindow that corresponds to this event window
 632         while (widget && !(win = wxGetWindowFromTable(widget)))
 633             widget = XtParent(widget);
 634
 635         if (!widget || !win)
 636             return FALSE;
 637
 638         wxKeyEvent keyEvent(wxEVT_CHAR);
 639         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 640
 641         // Now we have a wxKeyEvent and we have a wxWindow.
 642         // Go up the hierarchy until we find a matching accelerator,
 643         // or we get to the top.
 644         while (win)
 645         {
 646             if (win->ProcessAccelerator(keyEvent))
 647                 return TRUE;
 648             win = win->GetParent();
 649         }
 650         return FALSE;
 651     }
 652     return FALSE;
 653 }
 654
 655 bool wxApp::CheckForKeyDown(WXEvent* event)
 656 {
 657     XEvent* xEvent = (XEvent*) event;
 658     if (xEvent->xany.type == KeyPress)
 659     {
 660         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 661                                          xEvent->xany.window);
 662         wxWindow* win = NULL;
 663
 664         // Find the first wxWindow that corresponds to this event window
 665         while (widget && !(win = wxGetWindowFromTable(widget)))
 666             widget = XtParent(widget);
 667
 668         if (!widget || !win)
 669             return FALSE;
 670
 671         wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 672         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 673
 674         return win->ProcessEvent( keyEvent );
 675     }
 676
 677     return FALSE;
 678 }
 679
 680 bool wxApp::CheckForKeyUp(WXEvent* event)
 681 {
 682     XEvent* xEvent = (XEvent*) event;
 683     if (xEvent->xany.type == KeyRelease)
 684     {
 685         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(),
 686                                          xEvent->xany.window);
 687         wxWindow* win = NULL;
 688
 689         // Find the first wxWindow that corresponds to this event window
 690         while (widget && !(win = wxGetWindowFromTable(widget)))
 691             widget = XtParent(widget);
 692
 693         if (!widget || !win)
 694             return FALSE;
 695
 696         wxKeyEvent keyEvent(wxEVT_KEY_UP);
 697         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 698
 699         return win->ProcessEvent( keyEvent );
 700     }
 701
 702     return FALSE;
 703 }
 704
 705 void wxExit()
 706 {
 707     int retValue = 0;
 708     if (wxTheApp)
 709         retValue = wxTheApp->OnExit();
 710
 711     wxApp::CleanUp();
 712     /*
 713     * Exit in some platform-specific way. Not recommended that the app calls this:
 714     * only for emergencies.
 715     */
 716     exit(retValue);
 717 }
 718
 719 // Yield to other processes
 720 bool wxYield()
 721 {
 722     while (wxTheApp && wxTheApp->Pending())
 723         wxTheApp->Dispatch();
 724
 725     // VZ: is it the same as this (taken from old wxExecute)?
 726 #if 0
 727     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 728 #endif
 729
 730     return TRUE;
 731 }
 732
 733 // TODO use XmGetPixmap (?) to get the really standard icons!
 734
 735 #include "wx/generic/info.xpm"
 736 #include "wx/generic/error.xpm"
 737 #include "wx/generic/question.xpm"
 738 #include "wx/generic/warning.xpm"
 739
 740 wxIcon
 741 wxApp::GetStdIcon(int which) const
 742 {
 743     switch(which)
 744     {
 745         case wxICON_INFORMATION:
 746             return wxIcon(info_xpm);
 747
 748         case wxICON_QUESTION:
 749             return wxIcon(question_xpm);
 750
 751         case wxICON_EXCLAMATION:
 752             return wxIcon(warning_xpm);
 753
 754         default:
 755             wxFAIL_MSG("requested non existent standard icon");
 756             // still fall through
 757
 758         case wxICON_HAND:
 759             return wxIcon(error_xpm);
 760     }
 761 }