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/icon.h"
  21 #include "wx/dialog.h"
  22 #include "wx/log.h"
  23 #include "wx/module.h"
  24 #include "wx/memory.h"
  25 #include "wx/log.h"
  26 #include "wx/intl.h"
  27 #include "wx/evtloop.h"
  28
  29 #include "wx/univ/theme.h"
  30 #include "wx/univ/renderer.h"
  31
  32 #if wxUSE_THREADS
  33     #include "wx/thread.h"
  34 #endif
  35
  36 #if wxUSE_WX_RESOURCES
  37     #include "wx/resource.h"
  38 #endif
  39
  40 #include "wx/x11/private.h"
  41
  42 #include <string.h>
  43
  44 //------------------------------------------------------------------------
  45 //   global data
  46 //------------------------------------------------------------------------
  47
  48 extern wxList wxPendingDelete;
  49
  50 wxHashTable *wxWidgetHashTable = NULL;
  51
  52 wxApp *wxTheApp = NULL;
  53
  54 // This is set within wxEntryStart -- too early on
  55 // to put these in wxTheApp
  56 static int g_newArgc = 0;
  57 static wxChar** g_newArgv = NULL;
  58 static bool g_showIconic = FALSE;
  59 static wxSize g_initialSize = wxDefaultSize;
  60
  61 // This is required for wxFocusEvent::SetWindow(). It will only
  62 // work for focus events which we provoke ourselves (by calling
  63 // SetFocus()). It will not work for those events, which X11
  64 // generates itself.
  65 static wxWindow *g_nextFocus = NULL;
  66 static wxWindow *g_prevFocus = NULL;
  67
  68 //------------------------------------------------------------------------
  69 //   X11 error handling
  70 //------------------------------------------------------------------------
  71
  72 #ifdef __WXDEBUG__
  73 typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  74
  75 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  76
  77 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  78 {
  79     // just forward to the default handler for now
  80     if (gs_pfnXErrorHandler)
  81         return gs_pfnXErrorHandler(dpy, xevent);
  82     else
  83         return 0;
  84 }
  85 #endif // __WXDEBUG__
  86
  87 //------------------------------------------------------------------------
  88 //   wxApp
  89 //------------------------------------------------------------------------
  90
  91 long wxApp::sm_lastMessageTime = 0;
  92 WXDisplay *wxApp::ms_display = NULL;
  93
  94 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  95
  96 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  97     EVT_IDLE(wxApp::OnIdle)
  98 END_EVENT_TABLE()
  99
 100 bool wxApp::Initialize()
 101 {
 102     wxClassInfo::InitializeClasses();
 103
 104     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 105     // create a module for that as it's part of the core.
 106 #if wxUSE_THREADS
 107     wxPendingEventsLocker = new wxCriticalSection();
 108 #endif
 109
 110     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 111     wxTheColourDatabase->Initialize();
 112
 113     wxInitializeStockLists();
 114     wxInitializeStockObjects();
 115
 116 #if wxUSE_WX_RESOURCES
 117     wxInitializeResourceSystem();
 118 #endif
 119
 120     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 121
 122     wxModule::RegisterModules();
 123     if (!wxModule::InitializeModules()) return FALSE;
 124
 125     return TRUE;
 126 }
 127
 128 void wxApp::CleanUp()
 129 {
 130     if (g_newArgv)
 131         delete[] g_newArgv;
 132     g_newArgv = NULL;
 133
 134     delete wxWidgetHashTable;
 135     wxWidgetHashTable = NULL;
 136
 137     wxModule::CleanUpModules();
 138
 139 #if wxUSE_WX_RESOURCES
 140     wxCleanUpResourceSystem();
 141 #endif
 142
 143     delete wxTheColourDatabase;
 144     wxTheColourDatabase = NULL;
 145
 146     wxDeleteStockObjects();
 147
 148     wxDeleteStockLists();
 149
 150     delete wxTheApp;
 151     wxTheApp = NULL;
 152
 153     wxClassInfo::CleanUpClasses();
 154
 155 #if wxUSE_THREADS
 156     delete wxPendingEvents;
 157     delete wxPendingEventsLocker;
 158 #endif
 159
 160 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 161     // At this point we want to check if there are any memory
 162     // blocks that aren't part of the wxDebugContext itself,
 163     // as a special case. Then when dumping we need to ignore
 164     // wxDebugContext, too.
 165     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 166     {
 167         wxLogDebug("There were memory leaks.");
 168         wxDebugContext::Dump();
 169         wxDebugContext::PrintStatistics();
 170     }
 171 #endif
 172
 173     // do it as the very last thing because everything else can log messages
 174     wxLog::DontCreateOnDemand();
 175     // do it as the very last thing because everything else can log messages
 176     delete wxLog::SetActiveTarget(NULL);
 177 }
 178
 179 // NB: argc and argv may be changed here, pass by reference!
 180 int wxEntryStart( int& argc, char *argv[] )
 181 {
 182 #ifdef __WXDEBUG__
 183     // install the X error handler
 184     gs_pfnXErrorHandler = XSetErrorHandler( wxXErrorHandler );
 185 #endif // __WXDEBUG__
 186
 187     wxString displayName;
 188     bool syncDisplay = FALSE;
 189
 190     // Parse the arguments.
 191     // We can't use wxCmdLineParser or OnInitCmdLine and friends because
 192     // we have to create the Display earlier. If we can find a way to
 193     // use the wxAppBase API then I'll be quite happy to change it.
 194     g_newArgv = new wxChar*[argc];
 195     g_newArgc = 0;
 196     int i;
 197     for (i = 0; i < argc; i++)
 198     {
 199         wxString arg(argv[i]);
 200         if (arg == wxT("-display"))
 201         {
 202             if (i < (argc - 1))
 203             {
 204                 i ++;
 205                 displayName = argv[i];
 206                 continue;
 207             }
 208         }
 209         else if (arg == wxT("-geometry"))
 210         {
 211             if (i < (argc - 1))
 212             {
 213                 i ++;
 214                 wxString windowGeometry = argv[i];
 215                 int w, h;
 216                 if (wxSscanf(windowGeometry.c_str(), _T("%dx%d"), &w, &h) != 2)
 217                 {
 218                     wxLogError(_("Invalid geometry specification '%s'"), windowGeometry.c_str());
 219                 }
 220                 else
 221                 {
 222                     g_initialSize = wxSize(w, h);
 223                 }
 224                 continue;
 225             }
 226         }
 227         else if (arg == wxT("-sync"))
 228         {
 229             syncDisplay = TRUE;
 230             continue;
 231         }
 232         else if (arg == wxT("-iconic"))
 233         {
 234             g_showIconic = TRUE;
 235
 236             continue;
 237         }
 238
 239         // Not eaten by wxWindows, so pass through
 240         g_newArgv[g_newArgc] = argv[i];
 241         g_newArgc ++;
 242     }
 243
 244     Display* xdisplay = NULL;
 245     if (displayName.IsEmpty())
 246         xdisplay = XOpenDisplay(NULL);
 247     else
 248         xdisplay = XOpenDisplay((char*) displayName.c_str());
 249
 250     if (!xdisplay)
 251     {
 252         wxLogError( _("wxWindows could not open display. Exiting.") );
 253         return -1;
 254     }
 255
 256     if (syncDisplay)
 257     {
 258         XSynchronize(xdisplay, True);
 259     }
 260
 261     wxApp::ms_display = (WXDisplay*) xdisplay;
 262
 263     XSelectInput( xdisplay, XDefaultRootWindow(xdisplay), PropertyChangeMask);
 264
 265     wxSetDetectableAutoRepeat( TRUE );
 266
 267     if (!wxApp::Initialize())
 268         return -1;
 269
 270     return 0;
 271 }
 272
 273 int wxEntryInitGui()
 274 {
 275     int retValue = 0;
 276
 277     if ( !wxTheApp->OnInitGui() )
 278         retValue = -1;
 279
 280     return retValue;
 281 }
 282
 283
 284 int wxEntry( int argc, char *argv[] )
 285 {
 286 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 287     // This seems to be necessary since there are 'rogue'
 288     // objects present at this point (perhaps global objects?)
 289     // Setting a checkpoint will ignore them as far as the
 290     // memory checking facility is concerned.
 291     // Of course you may argue that memory allocated in globals should be
 292     // checked, but this is a reasonable compromise.
 293     wxDebugContext::SetCheckpoint();
 294 #endif
 295     int err = wxEntryStart(argc, argv);
 296     if (err)
 297         return err;
 298
 299     if (!wxTheApp)
 300     {
 301         if (!wxApp::GetInitializerFunction())
 302         {
 303             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 304             return 0;
 305         };
 306
 307         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 308     };
 309
 310     if (!wxTheApp)
 311     {
 312         printf( "wxWindows error: wxTheApp == NULL\n" );
 313         return 0;
 314     };
 315
 316     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 317     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 318
 319     // The command line may have been changed
 320     // by stripping out -display etc.
 321     if (g_newArgc > 0)
 322     {
 323         wxTheApp->argc = g_newArgc;
 324         wxTheApp->argv = g_newArgv;
 325     }
 326     else
 327     {
 328         wxTheApp->argc = argc;
 329         wxTheApp->argv = argv;
 330     }
 331     wxTheApp->m_showIconic = g_showIconic;
 332     wxTheApp->m_initialSize = g_initialSize;
 333
 334     int retValue;
 335     retValue = wxEntryInitGui();
 336
 337     // Here frames insert themselves automatically into wxTopLevelWindows by
 338     // getting created in OnInit().
 339     if ( retValue == 0 )
 340     {
 341         if ( !wxTheApp->OnInit() )
 342             retValue = -1;
 343     }
 344
 345     if ( retValue == 0 )
 346     {
 347         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 348     }
 349
 350     // flush the logged messages if any
 351     wxLog *pLog = wxLog::GetActiveTarget();
 352     if ( pLog != NULL && pLog->HasPendingMessages() )
 353         pLog->Flush();
 354
 355     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 356     // for further messages
 357
 358     if (wxTheApp->GetTopWindow())
 359     {
 360         delete wxTheApp->GetTopWindow();
 361         wxTheApp->SetTopWindow(NULL);
 362     }
 363
 364     wxTheApp->DeletePendingObjects();
 365
 366     wxTheApp->OnExit();
 367
 368     wxApp::CleanUp();
 369
 370     return retValue;
 371 };
 372
 373 // Static member initialization
 374 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 375
 376 wxApp::wxApp()
 377 {
 378     m_topWindow = NULL;
 379     wxTheApp = this;
 380     m_className = "";
 381     m_wantDebugOutput = TRUE ;
 382     m_appName = "";
 383     argc = 0;
 384     argv = NULL;
 385     m_exitOnFrameDelete = TRUE;
 386     m_mainColormap = (WXColormap) NULL;
 387     m_topLevelWidget = (WXWindow) NULL;
 388     m_maxRequestSize = 0;
 389     m_mainLoop = NULL;
 390     m_showIconic = FALSE;
 391     m_initialSize = wxDefaultSize;
 392 }
 393
 394 bool wxApp::Initialized()
 395 {
 396     if (GetTopWindow())
 397         return TRUE;
 398     else
 399         return FALSE;
 400 }
 401
 402 int wxApp::MainLoop()
 403 {
 404      int rt;
 405     m_mainLoop = new wxEventLoop;
 406
 407     rt = m_mainLoop->Run();
 408
 409     delete m_mainLoop;
 410     m_mainLoop = NULL;
 411     return rt;
 412 }
 413
 414 #if !wxUSE_NANOX
 415 //-----------------------------------------------------------------------
 416 // X11 predicate function for exposure compression
 417 //-----------------------------------------------------------------------
 418
 419 struct wxExposeInfo
 420 {
 421     Window window;
 422     Bool found_non_matching;
 423 };
 424
 425 static Bool expose_predicate (Display *display, XEvent *xevent, XPointer arg)
 426 {
 427     wxExposeInfo *info = (wxExposeInfo*) arg;
 428
 429     if (info->found_non_matching)
 430        return FALSE;
 431
 432     if (xevent->xany.type != Expose)
 433     {
 434         info->found_non_matching = TRUE;
 435         return FALSE;
 436     }
 437
 438     if (xevent->xexpose.window != info->window)
 439     {
 440         info->found_non_matching = TRUE;
 441         return FALSE;
 442     }
 443
 444     return TRUE;
 445 }
 446 #endif
 447     // wxUSE_NANOX
 448
 449 //-----------------------------------------------------------------------
 450 // Processes an X event.
 451 //-----------------------------------------------------------------------
 452
 453 void wxApp::ProcessXEvent(WXEvent* _event)
 454 {
 455     XEvent* event = (XEvent*) _event;
 456
 457     wxWindow* win = NULL;
 458     Window window = XEventGetWindow(event);
 459     Window actualWindow = window;
 460
 461     // Find the first wxWindow that corresponds to this event window
 462     // Because we're receiving events after a window
 463     // has been destroyed, assume a 1:1 match between
 464     // Window and wxWindow, so if it's not in the table,
 465     // it must have been destroyed.
 466
 467     win = wxGetWindowFromTable(window);
 468     if (!win)
 469             return;
 470
 471     switch (event->type)
 472     {
 473         case KeyPress:
 474         {
 475             if (!win->IsEnabled())
 476                 return;
 477
 478             wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 479             wxTranslateKeyEvent(keyEvent, win, window, event);
 480
 481             // wxLogDebug( "OnKey from %s", win->GetName().c_str() );
 482
 483             // We didn't process wxEVT_KEY_DOWN, so send
 484             // wxEVT_CHAR
 485             if (!win->GetEventHandler()->ProcessEvent( keyEvent ))
 486             {
 487                 keyEvent.SetEventType(wxEVT_CHAR);
 488                 win->GetEventHandler()->ProcessEvent( keyEvent );
 489             }
 490             return;
 491         }
 492         case KeyRelease:
 493         {
 494             if (!win->IsEnabled())
 495                 return;
 496
 497             wxKeyEvent keyEvent(wxEVT_KEY_UP);
 498             wxTranslateKeyEvent(keyEvent, win, window, event);
 499
 500             win->GetEventHandler()->ProcessEvent( keyEvent );
 501             return;
 502         }
 503         case ConfigureNotify:
 504         {
 505 #if wxUSE_NANOX
 506             if (event->update.utype == GR_UPDATE_SIZE)
 507 #endif
 508             {
 509                 wxSizeEvent sizeEvent( wxSize(XConfigureEventGetWidth(event), XConfigureEventGetHeight(event)), win->GetId() );
 510                 sizeEvent.SetEventObject( win );
 511
 512                 win->GetEventHandler()->ProcessEvent( sizeEvent );
 513             }
 514         }
 515 #if !wxUSE_NANOX
 516         case PropertyNotify:
 517         {
 518             HandlePropertyChange(_event);
 519             return;
 520         }
 521         case ClientMessage:
 522         {
 523             if (!win->IsEnabled())
 524                 return;
 525
 526             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);
 527             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);
 528
 529             if (event->xclient.message_type == wm_protocols)
 530             {
 531                 if ((Atom) (event->xclient.data.l[0]) == wm_delete_window)
 532                 {
 533                     win->Close(FALSE);
 534                 }
 535             }
 536             return;
 537         }
 538         case ResizeRequest:
 539         {
 540             /*
 541             * If resize event, don't resize until the last resize event for this
 542             * window is recieved. Prevents flicker as windows are resized.
 543             */
 544
 545             Display *disp = (Display*) wxGetDisplay();
 546             XEvent report;
 547
 548             //  to avoid flicker
 549             report = * event;
 550             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 551
 552             if (win)
 553             {
 554                 wxSize sz = win->GetSize();
 555                 wxSizeEvent sizeEvent(sz, win->GetId());
 556                 sizeEvent.SetEventObject(win);
 557
 558                 win->GetEventHandler()->ProcessEvent( sizeEvent );
 559             }
 560
 561             return;
 562         }
 563 #endif
 564 #if wxUSE_NANOX
 565         case GR_EVENT_TYPE_CLOSE_REQ:
 566         {
 567             if (win)
 568             {
 569                 win->Close(FALSE);
 570             }
 571             break;
 572         }
 573 #endif
 574         case Expose:
 575         {
 576             win->GetUpdateRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 577                                           XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 578
 579             win->GetClearRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 580                                          XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 581
 582
 583 #if !wxUSE_NANOX
 584             XEvent tmp_event;
 585             wxExposeInfo info;
 586             info.window = event->xexpose.window;
 587             info.found_non_matching = FALSE;
 588             while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, expose_predicate, (XPointer) &info ))
 589             {
 590                 win->GetUpdateRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 591                                               tmp_event.xexpose.width, tmp_event.xexpose.height );
 592
 593                 win->GetClearRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 594                                              tmp_event.xexpose.width, tmp_event.xexpose.height );
 595             }
 596 #endif
 597
 598             win->SendEraseEvents();
 599
 600             return;
 601         }
 602 #if !wxUSE_NANOX
 603         case GraphicsExpose:
 604         {
 605             // wxLogDebug( "GraphicsExpose from %s", win->GetName().c_str(),
 606             //                              event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 607             //                              event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 608
 609             win->GetUpdateRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 610                                           event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 611
 612             win->GetClearRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 613                                          event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 614
 615             if (event->xgraphicsexpose.count == 0)
 616             {
 617                 // Only erase background, paint in idle time.
 618                 win->SendEraseEvents();
 619             }
 620
 621             return;
 622         }
 623 #endif
 624         case EnterNotify:
 625         case LeaveNotify:
 626         case ButtonPress:
 627         case ButtonRelease:
 628         case MotionNotify:
 629         {
 630             if (!win->IsEnabled())
 631                 return;
 632
 633             // Here we check if the top level window is
 634             // disabled, which is one aspect of modality.
 635             wxWindow *tlw = win;
 636             while (tlw && !tlw->IsTopLevel())
 637                 tlw = tlw->GetParent();
 638             if (tlw && !tlw->IsEnabled())
 639                 return;
 640
 641             if (event->type == ButtonPress)
 642             {
 643                 if ((win != wxWindow::FindFocus()) && win->AcceptsFocus())
 644                 {
 645                     // This might actually be done in wxWindow::SetFocus()
 646                     // and not here.
 647                     g_prevFocus = wxWindow::FindFocus();
 648                     g_nextFocus = win;
 649
 650                     win->SetFocus();
 651                 }
 652             }
 653
 654             wxMouseEvent wxevent;
 655             wxTranslateMouseEvent(wxevent, win, window, event);
 656             win->GetEventHandler()->ProcessEvent( wxevent );
 657             return;
 658         }
 659         case FocusIn:
 660             {
 661 #if !wxUSE_NANOX
 662                 if ((event->xfocus.detail != NotifyPointer) &&
 663                     (event->xfocus.mode == NotifyNormal))
 664 #endif
 665                 {
 666                     // wxLogDebug( "FocusIn from %s of type %s", win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 667
 668                     wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 669                     focusEvent.SetEventObject(win);
 670                     focusEvent.SetWindow( g_prevFocus );
 671                     g_prevFocus = NULL;
 672
 673                     win->GetEventHandler()->ProcessEvent(focusEvent);
 674                 }
 675                 break;
 676             }
 677         case FocusOut:
 678             {
 679 #if !wxUSE_NANOX
 680                 if ((event->xfocus.detail != NotifyPointer) &&
 681                     (event->xfocus.mode == NotifyNormal))
 682 #endif
 683                 {
 684                     // wxLogDebug( "FocusOut from %s of type %s", win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 685
 686                     wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 687                     focusEvent.SetEventObject(win);
 688                     focusEvent.SetWindow( g_nextFocus );
 689                     g_nextFocus = NULL;
 690                     win->GetEventHandler()->ProcessEvent(focusEvent);
 691                 }
 692                 break;
 693             }
 694 #ifndef wxUSE_NANOX
 695          case DestroyNotify:
 696             {
 697                 // Do we want to process this (for top-level windows)?
 698                 // But we want to be able to veto closes, anyway
 699                 break;
 700             }
 701 #endif
 702         default:
 703         {
 704 #ifdef __WXDEBUG__
 705             //wxString eventName = wxGetXEventName(XEvent& event);
 706             //wxLogDebug(wxT("Event %s not handled"), eventName.c_str());
 707 #endif
 708             break;
 709         }
 710     }
 711 }
 712
 713 // Returns TRUE if more time is needed.
 714 // Note that this duplicates wxEventLoopImpl::SendIdleEvent
 715 // but ProcessIdle may be needed by apps, so is kept.
 716 bool wxApp::ProcessIdle()
 717 {
 718     wxIdleEvent event;
 719     event.SetEventObject(this);
 720     ProcessEvent(event);
 721
 722     return event.MoreRequested();
 723 }
 724
 725 void wxApp::ExitMainLoop()
 726 {
 727     if (m_mainLoop)
 728         m_mainLoop->Exit(0);
 729 }
 730
 731 // Is a message/event pending?
 732 bool wxApp::Pending()
 733 {
 734     return wxEventLoop::GetActive()->Pending();
 735 }
 736
 737 // Dispatch a message.
 738 void wxApp::Dispatch()
 739 {
 740     wxEventLoop::GetActive()->Dispatch();
 741 }
 742
 743 // This should be redefined in a derived class for
 744 // handling property change events for XAtom IPC.
 745 void wxApp::HandlePropertyChange(WXEvent *event)
 746 {
 747     // by default do nothing special
 748     // TODO: what to do for X11
 749     // XtDispatchEvent((XEvent*) event);
 750 }
 751
 752 void wxApp::OnIdle(wxIdleEvent& event)
 753 {
 754     static bool s_inOnIdle = FALSE;
 755
 756     // Avoid recursion (via ProcessEvent default case)
 757     if (s_inOnIdle)
 758         return;
 759
 760     s_inOnIdle = TRUE;
 761
 762     // Resend in the main thread events which have been prepared in other
 763     // threads
 764     ProcessPendingEvents();
 765
 766     // 'Garbage' collection of windows deleted with Close()
 767     DeletePendingObjects();
 768
 769     // Send OnIdle events to all windows
 770     bool needMore = SendIdleEvents();
 771
 772     if (needMore)
 773         event.RequestMore(TRUE);
 774
 775     s_inOnIdle = FALSE;
 776 }
 777
 778 void wxWakeUpIdle()
 779 {
 780     // **** please implement me! ****
 781     // Wake up the idle handler processor, even if it is in another thread...
 782 }
 783
 784
 785 // Send idle event to all top-level windows
 786 bool wxApp::SendIdleEvents()
 787 {
 788     bool needMore = FALSE;
 789
 790     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 791     while (node)
 792     {
 793         wxWindow* win = node->GetData();
 794         if (SendIdleEvents(win))
 795             needMore = TRUE;
 796         node = node->GetNext();
 797     }
 798
 799     return needMore;
 800 }
 801
 802 // Send idle event to window and all subwindows
 803 bool wxApp::SendIdleEvents(wxWindow* win)
 804 {
 805     bool needMore = FALSE;
 806
 807     wxIdleEvent event;
 808     event.SetEventObject(win);
 809
 810     win->GetEventHandler()->ProcessEvent(event);
 811
 812     win->OnInternalIdle();
 813
 814     if (event.MoreRequested())
 815         needMore = TRUE;
 816
 817     wxNode* node = win->GetChildren().First();
 818     while (node)
 819     {
 820         wxWindow* win = (wxWindow*) node->Data();
 821         if (SendIdleEvents(win))
 822             needMore = TRUE;
 823
 824         node = node->Next();
 825     }
 826
 827     return needMore;
 828 }
 829
 830 void wxApp::DeletePendingObjects()
 831 {
 832     wxNode *node = wxPendingDelete.First();
 833     while (node)
 834     {
 835         wxObject *obj = (wxObject *)node->Data();
 836
 837         delete obj;
 838
 839         if (wxPendingDelete.Member(obj))
 840             delete node;
 841
 842         // Deleting one object may have deleted other pending
 843         // objects, so start from beginning of list again.
 844         node = wxPendingDelete.First();
 845     }
 846 }
 847
 848 // Create display, and other initialization
 849 bool wxApp::OnInitGui()
 850 {
 851     // Eventually this line will be removed, but for
 852     // now we don't want to try popping up a dialog
 853     // for error messages.
 854     delete wxLog::SetActiveTarget(new wxLogStderr);
 855
 856     if (!wxAppBase::OnInitGui())
 857         return FALSE;
 858
 859     GetMainColormap( wxApp::GetDisplay() );
 860
 861     m_maxRequestSize = XMaxRequestSize( (Display*) wxApp::GetDisplay() );
 862
 863     return TRUE;
 864 }
 865
 866 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 867 {
 868     if (!display) /* Must be called first with non-NULL display */
 869         return m_mainColormap;
 870
 871     int defaultScreen = DefaultScreen((Display*) display);
 872     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 873
 874     Colormap c = DefaultColormapOfScreen(screen);
 875
 876     if (!m_mainColormap)
 877         m_mainColormap = (WXColormap) c;
 878
 879     return (WXColormap) c;
 880 }
 881
 882 Window wxGetWindowParent(Window window)
 883 {
 884     wxASSERT_MSG( window, "invalid window" );
 885
 886     return (Window) 0;
 887
 888     Window parent, root = 0;
 889 #if wxUSE_NANOX
 890     int noChildren = 0;
 891 #else
 892     unsigned int noChildren = 0;
 893 #endif
 894     Window* children = NULL;
 895
 896     // #define XQueryTree(d,w,r,p,c,nc)         GrQueryTree(w,p,c,nc)
 897     int res = 1;
 898 #if !wxUSE_NANOX
 899     res =
 900 #endif
 901         XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 902                          & children, & noChildren);
 903     if (children)
 904         XFree(children);
 905     if (res)
 906         return parent;
 907     else
 908         return (Window) 0;
 909 }
 910
 911 void wxExit()
 912 {
 913     int retValue = 0;
 914     if (wxTheApp)
 915         retValue = wxTheApp->OnExit();
 916
 917     wxApp::CleanUp();
 918     /*
 919     * Exit in some platform-specific way. Not recommended that the app calls this:
 920     * only for emergencies.
 921     */
 922     exit(retValue);
 923 }
 924
 925 // Yield to other processes
 926
 927 bool wxApp::Yield(bool onlyIfNeeded)
 928 {
 929     bool s_inYield = FALSE;
 930
 931     if ( s_inYield )
 932     {
 933         if ( !onlyIfNeeded )
 934         {
 935             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 936         }
 937
 938         return FALSE;
 939     }
 940
 941     s_inYield = TRUE;
 942
 943     while (wxTheApp && wxTheApp->Pending())
 944         wxTheApp->Dispatch();
 945
 946     s_inYield = FALSE;
 947
 948     return TRUE;
 949 }
 950
 951 wxIcon wxApp::GetStdIcon(int which) const
 952 {
 953     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 954 }
 955
 956 void wxApp::OnAssert(const wxChar *file, int line, const wxChar *msg)
 957 {
 958     // While the GUI isn't working that well, just print out the
 959     // message.
 960 #if 0
 961     wxAppBase::OnAssert(file, line, msg);
 962 #else
 963     wxString msg2;
 964     msg2.Printf("At file %s:%d: %s", file, line, msg);
 965     wxLogDebug(msg2);
 966 #endif
 967 }
 968