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 // Processes an X event.
 415 void wxApp::ProcessXEvent(WXEvent* _event)
 416 {
 417     XEvent* event = (XEvent*) _event;
 418
 419     wxWindow* win = NULL;
 420     Window window = XEventGetWindow(event);
 421     Window actualWindow = window;
 422
 423     // Find the first wxWindow that corresponds to this event window
 424     // Because we're receiving events after a window
 425     // has been destroyed, assume a 1:1 match between
 426     // Window and wxWindow, so if it's not in the table,
 427     // it must have been destroyed.
 428
 429     win = wxGetWindowFromTable(window);
 430     if (!win)
 431             return;
 432
 433     switch (event->type)
 434     {
 435         case KeyPress:
 436         {
 437             if (!win->IsEnabled())
 438                 return;
 439
 440             wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 441             wxTranslateKeyEvent(keyEvent, win, window, event);
 442
 443             // wxLogDebug( "OnKey from %s", win->GetName().c_str() );
 444
 445             // We didn't process wxEVT_KEY_DOWN, so send
 446             // wxEVT_CHAR
 447             if (!win->GetEventHandler()->ProcessEvent( keyEvent ))
 448             {
 449                 keyEvent.SetEventType(wxEVT_CHAR);
 450                 win->GetEventHandler()->ProcessEvent( keyEvent );
 451             }
 452             return;
 453         }
 454         case KeyRelease:
 455         {
 456             if (!win->IsEnabled())
 457                 return;
 458
 459             wxKeyEvent keyEvent(wxEVT_KEY_UP);
 460             wxTranslateKeyEvent(keyEvent, win, window, event);
 461
 462             win->GetEventHandler()->ProcessEvent( keyEvent );
 463             return;
 464         }
 465         case ConfigureNotify:
 466         {
 467 #if wxUSE_NANOX
 468             if (event->update.utype == GR_UPDATE_SIZE)
 469 #endif
 470             {
 471                 wxSizeEvent sizeEvent( wxSize(XConfigureEventGetWidth(event), XConfigureEventGetHeight(event)), win->GetId() );
 472                 sizeEvent.SetEventObject( win );
 473
 474                 win->GetEventHandler()->ProcessEvent( sizeEvent );
 475             }
 476         }
 477 #if !wxUSE_NANOX
 478         case PropertyNotify:
 479         {
 480             HandlePropertyChange(_event);
 481             return;
 482         }
 483         case ClientMessage:
 484         {
 485             if (!win->IsEnabled())
 486                 return;
 487
 488             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);
 489             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);
 490
 491             if (event->xclient.message_type == wm_protocols)
 492             {
 493                 if ((Atom) (event->xclient.data.l[0]) == wm_delete_window)
 494                 {
 495                     win->Close(FALSE);
 496                 }
 497             }
 498             return;
 499         }
 500         case ResizeRequest:
 501         {
 502             /*
 503             * If resize event, don't resize until the last resize event for this
 504             * window is recieved. Prevents flicker as windows are resized.
 505             */
 506
 507             Display *disp = (Display*) wxGetDisplay();
 508             XEvent report;
 509
 510             //  to avoid flicker
 511             report = * event;
 512             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 513
 514             if (win)
 515             {
 516                 wxSize sz = win->GetSize();
 517                 wxSizeEvent sizeEvent(sz, win->GetId());
 518                 sizeEvent.SetEventObject(win);
 519
 520                 win->GetEventHandler()->ProcessEvent( sizeEvent );
 521             }
 522
 523             return;
 524         }
 525 #endif
 526 #if wxUSE_NANOX
 527         case GR_EVENT_TYPE_CLOSE_REQ:
 528         {
 529             if (win)
 530             {
 531                 win->Close(FALSE);
 532             }
 533             break;
 534         }
 535 #endif
 536         case Expose:
 537         {
 538             win->GetUpdateRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 539                                           XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 540
 541             win->GetClearRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 542                                          XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 543
 544 #if !wxUSE_NANOX
 545             if (event->xexpose.count == 0)
 546 #endif
 547             {
 548                 // Only erase background, paint in idle time.
 549                 win->SendEraseEvents();
 550             }
 551
 552             return;
 553         }
 554 #if !wxUSE_NANOX
 555         case GraphicsExpose:
 556         {
 557             // wxLogDebug( "GraphicsExpose from %s", win->GetName().c_str(),
 558             //                              event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 559             //                              event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 560
 561             win->GetUpdateRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 562                                           event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 563
 564             win->GetClearRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 565                                          event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 566
 567             if (event->xgraphicsexpose.count == 0)
 568             {
 569                 // Only erase background, paint in idle time.
 570                 win->SendEraseEvents();
 571             }
 572
 573             return;
 574         }
 575 #endif
 576         case EnterNotify:
 577         case LeaveNotify:
 578         case ButtonPress:
 579         case ButtonRelease:
 580         case MotionNotify:
 581         {
 582             if (!win->IsEnabled())
 583                 return;
 584
 585             // Here we check if the top level window is
 586             // disabled, which is one aspect of modality.
 587             wxWindow *tlw = win;
 588             while (tlw && !tlw->IsTopLevel())
 589                 tlw = tlw->GetParent();
 590             if (tlw && !tlw->IsEnabled())
 591                 return;
 592
 593             if (event->type == ButtonPress)
 594             {
 595                 if ((win != wxWindow::FindFocus()) && win->AcceptsFocus())
 596                 {
 597                     // This might actually be done in wxWindow::SetFocus()
 598                     // and not here.
 599                     g_prevFocus = wxWindow::FindFocus();
 600                     g_nextFocus = win;
 601
 602                     win->SetFocus();
 603                 }
 604             }
 605
 606             wxMouseEvent wxevent;
 607             wxTranslateMouseEvent(wxevent, win, window, event);
 608             win->GetEventHandler()->ProcessEvent( wxevent );
 609             return;
 610         }
 611         case FocusIn:
 612             {
 613 #if !wxUSE_NANOX
 614                 if ((event->xfocus.detail != NotifyPointer) &&
 615                     (event->xfocus.mode == NotifyNormal))
 616 #endif
 617                 {
 618                     // wxLogDebug( "FocusIn from %s of type %s", win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 619
 620                     wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 621                     focusEvent.SetEventObject(win);
 622                     focusEvent.SetWindow( g_prevFocus );
 623                     g_prevFocus = NULL;
 624                     win->GetEventHandler()->ProcessEvent(focusEvent);
 625                 }
 626                 break;
 627             }
 628         case FocusOut:
 629             {
 630 #if !wxUSE_NANOX
 631                 if ((event->xfocus.detail != NotifyPointer) &&
 632                     (event->xfocus.mode == NotifyNormal))
 633 #endif
 634                 {
 635                     // wxLogDebug( "FocusOut from %s of type %s", win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 636
 637                     wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 638                     focusEvent.SetEventObject(win);
 639                     focusEvent.SetWindow( g_nextFocus );
 640                     g_nextFocus = NULL;
 641                     win->GetEventHandler()->ProcessEvent(focusEvent);
 642                 }
 643                 break;
 644             }
 645 #ifndef wxUSE_NANOX
 646          case DestroyNotify:
 647             {
 648                 // Do we want to process this (for top-level windows)?
 649                 // But we want to be able to veto closes, anyway
 650                 break;
 651             }
 652 #endif
 653         default:
 654         {
 655 #ifdef __WXDEBUG__
 656             //wxString eventName = wxGetXEventName(XEvent& event);
 657             //wxLogDebug(wxT("Event %s not handled"), eventName.c_str());
 658 #endif
 659             break;
 660         }
 661     }
 662 }
 663
 664 // Returns TRUE if more time is needed.
 665 // Note that this duplicates wxEventLoopImpl::SendIdleEvent
 666 // but ProcessIdle may be needed by apps, so is kept.
 667 bool wxApp::ProcessIdle()
 668 {
 669     wxIdleEvent event;
 670     event.SetEventObject(this);
 671     ProcessEvent(event);
 672
 673     return event.MoreRequested();
 674 }
 675
 676 void wxApp::ExitMainLoop()
 677 {
 678     if (m_mainLoop)
 679         m_mainLoop->Exit(0);
 680 }
 681
 682 // Is a message/event pending?
 683 bool wxApp::Pending()
 684 {
 685     return wxEventLoop::GetActive()->Pending();
 686 }
 687
 688 // Dispatch a message.
 689 void wxApp::Dispatch()
 690 {
 691     wxEventLoop::GetActive()->Dispatch();
 692 }
 693
 694 // This should be redefined in a derived class for
 695 // handling property change events for XAtom IPC.
 696 void wxApp::HandlePropertyChange(WXEvent *event)
 697 {
 698     // by default do nothing special
 699     // TODO: what to do for X11
 700     // XtDispatchEvent((XEvent*) event);
 701 }
 702
 703 void wxApp::OnIdle(wxIdleEvent& event)
 704 {
 705     static bool s_inOnIdle = FALSE;
 706
 707     // Avoid recursion (via ProcessEvent default case)
 708     if (s_inOnIdle)
 709         return;
 710
 711     s_inOnIdle = TRUE;
 712
 713     // Resend in the main thread events which have been prepared in other
 714     // threads
 715     ProcessPendingEvents();
 716
 717     // 'Garbage' collection of windows deleted with Close()
 718     DeletePendingObjects();
 719
 720     // Send OnIdle events to all windows
 721     bool needMore = SendIdleEvents();
 722
 723     if (needMore)
 724         event.RequestMore(TRUE);
 725
 726     s_inOnIdle = FALSE;
 727 }
 728
 729 void wxWakeUpIdle()
 730 {
 731     // **** please implement me! ****
 732     // Wake up the idle handler processor, even if it is in another thread...
 733 }
 734
 735
 736 // Send idle event to all top-level windows
 737 bool wxApp::SendIdleEvents()
 738 {
 739     bool needMore = FALSE;
 740
 741     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 742     while (node)
 743     {
 744         wxWindow* win = node->GetData();
 745         if (SendIdleEvents(win))
 746             needMore = TRUE;
 747         node = node->GetNext();
 748     }
 749
 750     return needMore;
 751 }
 752
 753 // Send idle event to window and all subwindows
 754 bool wxApp::SendIdleEvents(wxWindow* win)
 755 {
 756     bool needMore = FALSE;
 757
 758     wxIdleEvent event;
 759     event.SetEventObject(win);
 760
 761     win->GetEventHandler()->ProcessEvent(event);
 762
 763     win->OnInternalIdle();
 764
 765     if (event.MoreRequested())
 766         needMore = TRUE;
 767
 768     wxNode* node = win->GetChildren().First();
 769     while (node)
 770     {
 771         wxWindow* win = (wxWindow*) node->Data();
 772         if (SendIdleEvents(win))
 773             needMore = TRUE;
 774
 775         node = node->Next();
 776     }
 777
 778     return needMore;
 779 }
 780
 781 void wxApp::DeletePendingObjects()
 782 {
 783     wxNode *node = wxPendingDelete.First();
 784     while (node)
 785     {
 786         wxObject *obj = (wxObject *)node->Data();
 787
 788         delete obj;
 789
 790         if (wxPendingDelete.Member(obj))
 791             delete node;
 792
 793         // Deleting one object may have deleted other pending
 794         // objects, so start from beginning of list again.
 795         node = wxPendingDelete.First();
 796     }
 797 }
 798
 799 // Create display, and other initialization
 800 bool wxApp::OnInitGui()
 801 {
 802     // Eventually this line will be removed, but for
 803     // now we don't want to try popping up a dialog
 804     // for error messages.
 805     delete wxLog::SetActiveTarget(new wxLogStderr);
 806
 807     if (!wxAppBase::OnInitGui())
 808         return FALSE;
 809
 810     GetMainColormap( wxApp::GetDisplay() );
 811
 812     m_maxRequestSize = XMaxRequestSize( (Display*) wxApp::GetDisplay() );
 813
 814     return TRUE;
 815 }
 816
 817 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 818 {
 819     if (!display) /* Must be called first with non-NULL display */
 820         return m_mainColormap;
 821
 822     int defaultScreen = DefaultScreen((Display*) display);
 823     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 824
 825     Colormap c = DefaultColormapOfScreen(screen);
 826
 827     if (!m_mainColormap)
 828         m_mainColormap = (WXColormap) c;
 829
 830     return (WXColormap) c;
 831 }
 832
 833 Window wxGetWindowParent(Window window)
 834 {
 835     wxASSERT_MSG( window, "invalid window" );
 836
 837     return (Window) 0;
 838
 839     Window parent, root = 0;
 840 #if wxUSE_NANOX
 841     int noChildren = 0;
 842 #else
 843     unsigned int noChildren = 0;
 844 #endif
 845     Window* children = NULL;
 846
 847     // #define XQueryTree(d,w,r,p,c,nc)         GrQueryTree(w,p,c,nc)
 848     int res = 1;
 849 #if !wxUSE_NANOX
 850     res =
 851 #endif
 852         XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 853                          & children, & noChildren);
 854     if (children)
 855         XFree(children);
 856     if (res)
 857         return parent;
 858     else
 859         return (Window) 0;
 860 }
 861
 862 void wxExit()
 863 {
 864     int retValue = 0;
 865     if (wxTheApp)
 866         retValue = wxTheApp->OnExit();
 867
 868     wxApp::CleanUp();
 869     /*
 870     * Exit in some platform-specific way. Not recommended that the app calls this:
 871     * only for emergencies.
 872     */
 873     exit(retValue);
 874 }
 875
 876 // Yield to other processes
 877
 878 bool wxApp::Yield(bool onlyIfNeeded)
 879 {
 880     bool s_inYield = FALSE;
 881
 882     if ( s_inYield )
 883     {
 884         if ( !onlyIfNeeded )
 885         {
 886             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 887         }
 888
 889         return FALSE;
 890     }
 891
 892     s_inYield = TRUE;
 893
 894     while (wxTheApp && wxTheApp->Pending())
 895         wxTheApp->Dispatch();
 896
 897     s_inYield = FALSE;
 898
 899     return TRUE;
 900 }
 901
 902 wxIcon wxApp::GetStdIcon(int which) const
 903 {
 904     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 905 }
 906
 907 void wxApp::OnAssert(const wxChar *file, int line, const wxChar *msg)
 908 {
 909     // While the GUI isn't working that well, just print out the
 910     // message.
 911 #if 0
 912     wxAppBase::OnAssert(file, line, msg);
 913 #else
 914     wxString msg2;
 915     msg2.Printf("At file %s:%d: %s", file, line, msg);
 916     wxLogDebug(msg2);
 917 #endif
 918 }
 919