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 #include "wx/timer.h"
  29 #include "wx/filename.h"
  30 #include "wx/hash.h"
  31
  32 #include "wx/univ/theme.h"
  33 #include "wx/univ/renderer.h"
  34
  35 #if wxUSE_THREADS
  36     #include "wx/thread.h"
  37 #endif
  38
  39 #include "wx/x11/private.h"
  40
  41 #include <string.h>
  42
  43 //------------------------------------------------------------------------
  44 //   global data
  45 //------------------------------------------------------------------------
  46
  47 extern wxList wxPendingDelete;
  48
  49 wxHashTable *wxWidgetHashTable = NULL;
  50 wxHashTable *wxClientWidgetHashTable = NULL;
  51
  52 static bool g_showIconic = FALSE;
  53 static wxSize g_initialSize = wxDefaultSize;
  54
  55 // This is required for wxFocusEvent::SetWindow(). It will only
  56 // work for focus events which we provoke ourselves (by calling
  57 // SetFocus()). It will not work for those events, which X11
  58 // generates itself.
  59 static wxWindow *g_nextFocus = NULL;
  60 static wxWindow *g_prevFocus = NULL;
  61
  62 //------------------------------------------------------------------------
  63 //   X11 error handling
  64 //------------------------------------------------------------------------
  65
  66 #ifdef __WXDEBUG__
  67 typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  68
  69 XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  70
  71 static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  72 {
  73     // just forward to the default handler for now
  74     if (gs_pfnXErrorHandler)
  75         return gs_pfnXErrorHandler(dpy, xevent);
  76     else
  77         return 0;
  78 }
  79 #endif // __WXDEBUG__
  80
  81 //------------------------------------------------------------------------
  82 //   wxApp
  83 //------------------------------------------------------------------------
  84
  85 long wxApp::sm_lastMessageTime = 0;
  86 WXDisplay *wxApp::ms_display = NULL;
  87
  88 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  89
  90 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  91     EVT_IDLE(wxApp::OnIdle)
  92 END_EVENT_TABLE()
  93
  94 bool wxApp::Initialize(int& argc, wxChar **argv)
  95 {
  96 #if defined(__WXDEBUG__) && !wxUSE_NANOX
  97     // install the X error handler
  98     gs_pfnXErrorHandler = XSetErrorHandler( wxXErrorHandler );
  99 #endif // __WXDEBUG__
 100
 101     char *displayName = NULL;
 102     bool syncDisplay = FALSE;
 103
 104     int argcOrig = argc;
 105     for ( int i = 0; i < argcOrig; i++ )
 106     {
 107         if (wxStrcmp( argv[i], _T("-display") ) == 0)
 108         {
 109             if (i < (argc - 1))
 110             {
 111                 argv[i++] = NULL;
 112
 113                 displayName = argv[i];
 114
 115                 argv[i] = NULL;
 116                 argc -= 2;
 117             }
 118         }
 119         else if (wxStrcmp( argv[i], _T("-geometry") ) == 0)
 120         {
 121             if (i < (argc - 1))
 122             {
 123                 argv[i++] = NULL;
 124
 125                 int w, h;
 126                 if (wxSscanf(argv[i], _T("%dx%d"), &w, &h) != 2)
 127                 {
 128                     wxLogError( _("Invalid geometry specification '%s'"),
 129                                 wxString::FromAscii(argv[i]).c_str() );
 130                 }
 131                 else
 132                 {
 133                     g_initialSize = wxSize(w, h);
 134                 }
 135
 136                 argv[i] = NULL;
 137                 argc -= 2;
 138             }
 139         }
 140         else if (wxStrcmp( argv[i], _T("-sync") ) == 0)
 141         {
 142             syncDisplay = TRUE;
 143
 144             argv[i] = NULL;
 145             argc--;
 146         }
 147         else if (wxStrcmp( argv[i], _T("-iconic") ) == 0)
 148         {
 149             g_showIconic = TRUE;
 150
 151             argv[i] = NULL;
 152             argc--;
 153         }
 154     }
 155
 156     if ( argc != argcOrig )
 157     {
 158         // remove the argumens we consumed
 159         for ( int i = 0; i < argc; i++ )
 160         {
 161             while ( !argv[i] )
 162             {
 163                 memmove(argv + i, argv + i + 1, argcOrig - i);
 164             }
 165         }
 166     }
 167
 168     // X11 display stuff
 169     Display *xdisplay = XOpenDisplay( displayName );
 170     if (!xdisplay)
 171     {
 172         wxLogError( _("wxWindows could not open display. Exiting.") );
 173         return false;
 174     }
 175
 176     if (syncDisplay)
 177         XSynchronize(xdisplay, True);
 178
 179     ms_display = (WXDisplay*) xdisplay;
 180
 181     XSelectInput( xdisplay, XDefaultRootWindow(xdisplay), PropertyChangeMask);
 182
 183     // Misc.
 184     wxSetDetectableAutoRepeat( TRUE );
 185
 186     if ( !wxAppBase::Initialize(argc, argv) )
 187     {
 188         XCloseDisplay(xdisplay);
 189
 190         return false;
 191     }
 192
 193 #if wxUSE_UNICODE
 194     // Glib's type system required by Pango
 195     g_type_init();
 196 #endif
 197
 198 #if wxUSE_INTL
 199     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 200 #endif
 201
 202     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 203     wxClientWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 204
 205     return true;
 206 }
 207
 208 void wxApp::CleanUp()
 209 {
 210     delete wxWidgetHashTable;
 211     wxWidgetHashTable = NULL;
 212     delete wxClientWidgetHashTable;
 213     wxClientWidgetHashTable = NULL;
 214
 215     wxAppBase::CleanUp();
 216 }
 217
 218 wxApp::wxApp()
 219 {
 220     // TODO: parse the command line
 221     argc = 0;
 222     argv = NULL;
 223
 224     m_mainColormap = (WXColormap) NULL;
 225     m_topLevelWidget = (WXWindow) NULL;
 226     m_maxRequestSize = 0;
 227     m_mainLoop = NULL;
 228     m_showIconic = FALSE;
 229     m_initialSize = wxDefaultSize;
 230
 231 #if !wxUSE_NANOX
 232     m_visualInfo = NULL;
 233 #endif
 234 }
 235
 236 wxApp::~wxApp()
 237 {
 238 #if !wxUSE_NANOX
 239     delete m_visualInfo;
 240 #endif
 241 }
 242
 243 bool wxApp::Initialized()
 244 {
 245     if (GetTopWindow())
 246         return TRUE;
 247     else
 248         return FALSE;
 249 }
 250
 251 int wxApp::MainLoop()
 252 {
 253     int rt;
 254     m_mainLoop = new wxEventLoop;
 255
 256     rt = m_mainLoop->Run();
 257
 258     delete m_mainLoop;
 259     m_mainLoop = NULL;
 260     return rt;
 261 }
 262
 263 #if !wxUSE_NANOX
 264 //-----------------------------------------------------------------------
 265 // X11 predicate function for exposure compression
 266 //-----------------------------------------------------------------------
 267
 268 struct wxExposeInfo
 269 {
 270     Window window;
 271     Bool found_non_matching;
 272 };
 273
 274 static Bool expose_predicate (Display *display, XEvent *xevent, XPointer arg)
 275 {
 276     wxExposeInfo *info = (wxExposeInfo*) arg;
 277
 278     if (info->found_non_matching)
 279        return FALSE;
 280
 281     if (xevent->xany.type != Expose)
 282     {
 283         info->found_non_matching = TRUE;
 284         return FALSE;
 285     }
 286
 287     if (xevent->xexpose.window != info->window)
 288     {
 289         info->found_non_matching = TRUE;
 290         return FALSE;
 291     }
 292
 293     return TRUE;
 294 }
 295 #endif
 296     // wxUSE_NANOX
 297
 298 //-----------------------------------------------------------------------
 299 // Processes an X event, returning TRUE if the event was processed.
 300 //-----------------------------------------------------------------------
 301
 302 bool wxApp::ProcessXEvent(WXEvent* _event)
 303 {
 304     XEvent* event = (XEvent*) _event;
 305
 306     wxWindow* win = NULL;
 307     Window window = XEventGetWindow(event);
 308 #if 0
 309     Window actualWindow = window;
 310 #endif
 311
 312     // Find the first wxWindow that corresponds to this event window
 313     // Because we're receiving events after a window
 314     // has been destroyed, assume a 1:1 match between
 315     // Window and wxWindow, so if it's not in the table,
 316     // it must have been destroyed.
 317
 318     win = wxGetWindowFromTable(window);
 319     if (!win)
 320     {
 321 #if wxUSE_TWO_WINDOWS
 322         win = wxGetClientWindowFromTable(window);
 323         if (!win)
 324 #endif
 325             return FALSE;
 326     }
 327
 328 #ifdef __WXDEBUG__
 329     wxString windowClass = win->GetClassInfo()->GetClassName();
 330 #endif
 331
 332     switch (event->type)
 333     {
 334         case Expose:
 335         {
 336 #if wxUSE_TWO_WINDOWS && !wxUSE_NANOX
 337             if (event->xexpose.window != (Window)win->GetClientAreaWindow())
 338             {
 339                 XEvent tmp_event;
 340                 wxExposeInfo info;
 341                 info.window = event->xexpose.window;
 342                 info.found_non_matching = FALSE;
 343                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, expose_predicate, (XPointer) &info ))
 344                 {
 345                     // Don't worry about optimizing redrawing the border etc.
 346                 }
 347                 win->NeedUpdateNcAreaInIdle();
 348             }
 349             else
 350 #endif
 351             {
 352                 win->GetUpdateRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 353                                               XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 354                 win->GetClearRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 355                                          XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 356
 357 #if !wxUSE_NANOX
 358                 XEvent tmp_event;
 359                 wxExposeInfo info;
 360                 info.window = event->xexpose.window;
 361                 info.found_non_matching = FALSE;
 362                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, expose_predicate, (XPointer) &info ))
 363                 {
 364                     win->GetUpdateRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 365                                                   tmp_event.xexpose.width, tmp_event.xexpose.height );
 366
 367                     win->GetClearRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 368                                                  tmp_event.xexpose.width, tmp_event.xexpose.height );
 369                 }
 370 #endif
 371
 372                 // This simplifies the expose and clear areas to simple
 373                 // rectangles.
 374                 win->GetUpdateRegion() = win->GetUpdateRegion().GetBox();
 375                 win->GetClearRegion() = win->GetClearRegion().GetBox();
 376
 377                 // If we only have one X11 window, always indicate
 378                 // that borders might have to be redrawn.
 379                 if (win->GetMainWindow() == win->GetClientAreaWindow())
 380                     win->NeedUpdateNcAreaInIdle();
 381
 382                 // Only erase background, paint in idle time.
 383                 win->SendEraseEvents();
 384
 385                 // EXPERIMENT
 386                 //win->Update();
 387             }
 388
 389             return TRUE;
 390         }
 391
 392 #if !wxUSE_NANOX
 393         case GraphicsExpose:
 394         {
 395             printf( "GraphicExpose event\n" );
 396
 397             wxLogTrace( _T("expose"), _T("GraphicsExpose from %s"), win->GetName().c_str());
 398
 399             win->GetUpdateRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 400                                           event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 401
 402             win->GetClearRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 403                                          event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 404
 405             if (event->xgraphicsexpose.count == 0)
 406             {
 407                 // Only erase background, paint in idle time.
 408                 win->SendEraseEvents();
 409                 // win->Update();
 410             }
 411
 412             return TRUE;
 413         }
 414 #endif
 415
 416         case KeyPress:
 417         {
 418             if (!win->IsEnabled())
 419                 return FALSE;
 420
 421             wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 422             wxTranslateKeyEvent(keyEvent, win, window, event);
 423
 424             // wxLogDebug( "OnKey from %s", win->GetName().c_str() );
 425
 426             // We didn't process wxEVT_KEY_DOWN, so send wxEVT_CHAR
 427             if (win->GetEventHandler()->ProcessEvent( keyEvent ))
 428                 return TRUE;
 429
 430             keyEvent.SetEventType(wxEVT_CHAR);
 431             // Do the translation again, retaining the ASCII
 432             // code.
 433             wxTranslateKeyEvent(keyEvent, win, window, event, TRUE);
 434             if (win->GetEventHandler()->ProcessEvent( keyEvent ))
 435                 return TRUE;
 436
 437             if ( (keyEvent.m_keyCode == WXK_TAB) &&
 438                  win->GetParent() && (win->GetParent()->HasFlag( wxTAB_TRAVERSAL)) )
 439             {
 440                 wxNavigationKeyEvent new_event;
 441                 new_event.SetEventObject( win->GetParent() );
 442                 /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 443                 new_event.SetDirection( (keyEvent.m_keyCode == WXK_TAB) );
 444                 /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 445                 new_event.SetWindowChange( keyEvent.ControlDown() );
 446                 new_event.SetCurrentFocus( win );
 447                 return win->GetParent()->GetEventHandler()->ProcessEvent( new_event );
 448             }
 449
 450             return FALSE;
 451         }
 452         case KeyRelease:
 453         {
 454             if (!win->IsEnabled())
 455                 return FALSE;
 456
 457             wxKeyEvent keyEvent(wxEVT_KEY_UP);
 458             wxTranslateKeyEvent(keyEvent, win, window, event);
 459
 460             return win->GetEventHandler()->ProcessEvent( keyEvent );
 461         }
 462         case ConfigureNotify:
 463         {
 464 #if wxUSE_NANOX
 465             if (event->update.utype == GR_UPDATE_SIZE)
 466 #endif
 467             {
 468                 if (win->IsTopLevel())
 469                 {
 470                     wxTopLevelWindow *tlw = (wxTopLevelWindow*) win;
 471                     tlw->SetConfigureGeometry( XConfigureEventGetX(event), XConfigureEventGetY(event),
 472                         XConfigureEventGetWidth(event), XConfigureEventGetHeight(event) );
 473                 }
 474
 475                 if (win->IsTopLevel() && win->IsShown())
 476                 {
 477                     wxTopLevelWindowX11 *tlw = (wxTopLevelWindowX11 *) win;
 478                     tlw->SetNeedResizeInIdle();
 479                 }
 480                 else
 481                 {
 482                     wxSizeEvent sizeEvent( wxSize(XConfigureEventGetWidth(event), XConfigureEventGetHeight(event)), win->GetId() );
 483                     sizeEvent.SetEventObject( win );
 484
 485                     return win->GetEventHandler()->ProcessEvent( sizeEvent );
 486                 }
 487             }
 488             return FALSE;
 489             break;
 490         }
 491 #if !wxUSE_NANOX
 492         case PropertyNotify:
 493         {
 494             //wxLogDebug("PropertyNotify: %s", windowClass.c_str());
 495             return HandlePropertyChange(_event);
 496         }
 497         case ClientMessage:
 498         {
 499             if (!win->IsEnabled())
 500                 return FALSE;
 501
 502             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);
 503             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);
 504
 505             if (event->xclient.message_type == wm_protocols)
 506             {
 507                 if ((Atom) (event->xclient.data.l[0]) == wm_delete_window)
 508                 {
 509                     win->Close(FALSE);
 510                     return TRUE;
 511                 }
 512             }
 513             return FALSE;
 514         }
 515 #if 0
 516         case DestroyNotify:
 517         {
 518             printf( "destroy from %s\n", win->GetName().c_str() );
 519             break;
 520         }
 521         case CreateNotify:
 522         {
 523             printf( "create from %s\n", win->GetName().c_str() );
 524             break;
 525         }
 526         case MapRequest:
 527         {
 528             printf( "map request from %s\n", win->GetName().c_str() );
 529             break;
 530         }
 531         case ResizeRequest:
 532         {
 533             printf( "resize request from %s\n", win->GetName().c_str() );
 534
 535             Display *disp = (Display*) wxGetDisplay();
 536             XEvent report;
 537
 538             //  to avoid flicker
 539             report = * event;
 540             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 541
 542             wxSize sz = win->GetSize();
 543             wxSizeEvent sizeEvent(sz, win->GetId());
 544             sizeEvent.SetEventObject(win);
 545
 546             return win->GetEventHandler()->ProcessEvent( sizeEvent );
 547         }
 548 #endif
 549 #endif
 550 #if wxUSE_NANOX
 551         case GR_EVENT_TYPE_CLOSE_REQ:
 552         {
 553             if (win)
 554             {
 555                 win->Close(FALSE);
 556                 return TRUE;
 557             }
 558             return FALSE;
 559             break;
 560         }
 561 #endif
 562         case EnterNotify:
 563         case LeaveNotify:
 564         case ButtonPress:
 565         case ButtonRelease:
 566         case MotionNotify:
 567         {
 568             if (!win->IsEnabled())
 569                 return FALSE;
 570
 571             // Here we check if the top level window is
 572             // disabled, which is one aspect of modality.
 573             wxWindow *tlw = win;
 574             while (tlw && !tlw->IsTopLevel())
 575                 tlw = tlw->GetParent();
 576             if (tlw && !tlw->IsEnabled())
 577                 return FALSE;
 578
 579             if (event->type == ButtonPress)
 580             {
 581                 if ((win != wxWindow::FindFocus()) && win->AcceptsFocus())
 582                 {
 583                     // This might actually be done in wxWindow::SetFocus()
 584                     // and not here. TODO.
 585                     g_prevFocus = wxWindow::FindFocus();
 586                     g_nextFocus = win;
 587
 588                     wxLogTrace( _T("focus"), _T("About to call SetFocus on %s of type %s due to button press"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 589
 590                     // Record the fact that this window is
 591                     // getting the focus, because we'll need to
 592                     // check if its parent is getting a bogus
 593                     // focus and duly ignore it.
 594                     // TODO: may need to have this code in SetFocus, too.
 595                     extern wxWindow* g_GettingFocus;
 596                     g_GettingFocus = win;
 597                     win->SetFocus();
 598                 }
 599             }
 600
 601 #if !wxUSE_NANOX
 602             if (event->type == LeaveNotify || event->type == EnterNotify)
 603             {
 604                 // Throw out NotifyGrab and NotifyUngrab
 605                 if (event->xcrossing.mode != NotifyNormal)
 606                     return FALSE;
 607             }
 608 #endif
 609             wxMouseEvent wxevent;
 610             wxTranslateMouseEvent(wxevent, win, window, event);
 611             return win->GetEventHandler()->ProcessEvent( wxevent );
 612         }
 613         case FocusIn:
 614             {
 615 #if !wxUSE_NANOX
 616                 if ((event->xfocus.detail != NotifyPointer) &&
 617                     (event->xfocus.mode == NotifyNormal))
 618 #endif
 619                 {
 620                     wxLogTrace( _T("focus"), _T("FocusIn from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 621
 622                     extern wxWindow* g_GettingFocus;
 623                     if (g_GettingFocus && g_GettingFocus->GetParent() == win)
 624                     {
 625                         // Ignore this, this can be a spurious FocusIn
 626                         // caused by a child having its focus set.
 627                         g_GettingFocus = NULL;
 628                         wxLogTrace( _T("focus"), _T("FocusIn from %s of type %s being deliberately ignored"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 629                         return TRUE;
 630                     }
 631                     else
 632                     {
 633                         wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 634                         focusEvent.SetEventObject(win);
 635                         focusEvent.SetWindow( g_prevFocus );
 636                         g_prevFocus = NULL;
 637
 638                         return win->GetEventHandler()->ProcessEvent(focusEvent);
 639                     }
 640                 }
 641                 return FALSE;
 642                 break;
 643             }
 644         case FocusOut:
 645             {
 646 #if !wxUSE_NANOX
 647                 if ((event->xfocus.detail != NotifyPointer) &&
 648                     (event->xfocus.mode == NotifyNormal))
 649 #endif
 650                 {
 651                     wxLogTrace( _T("focus"), _T("FocusOut from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 652
 653                     wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 654                     focusEvent.SetEventObject(win);
 655                     focusEvent.SetWindow( g_nextFocus );
 656                     g_nextFocus = NULL;
 657                     return win->GetEventHandler()->ProcessEvent(focusEvent);
 658                 }
 659                 return FALSE;
 660                 break;
 661             }
 662         default:
 663         {
 664 #ifdef __WXDEBUG__
 665             //wxString eventName = wxGetXEventName(XEvent& event);
 666             //wxLogDebug(wxT("Event %s not handled"), eventName.c_str());
 667 #endif
 668             return FALSE;
 669             break;
 670         }
 671     }
 672     return FALSE;
 673 }
 674
 675 // Returns TRUE if more time is needed.
 676 // Note that this duplicates wxEventLoopImpl::SendIdleEvent
 677 // but ProcessIdle may be needed by apps, so is kept.
 678 bool wxApp::ProcessIdle()
 679 {
 680     wxIdleEvent event;
 681     event.SetEventObject(this);
 682     ProcessEvent(event);
 683
 684     wxUpdateUIEvent::ResetUpdateTime();
 685
 686     return event.MoreRequested();
 687 }
 688
 689 void wxApp::ExitMainLoop()
 690 {
 691     if (m_mainLoop)
 692         m_mainLoop->Exit(0);
 693 }
 694
 695 // Is a message/event pending?
 696 bool wxApp::Pending()
 697 {
 698     return wxEventLoop::GetActive()->Pending();
 699 }
 700
 701 // Dispatch a message.
 702 void wxApp::Dispatch()
 703 {
 704     wxEventLoop::GetActive()->Dispatch();
 705 }
 706
 707 // This should be redefined in a derived class for
 708 // handling property change events for XAtom IPC.
 709 bool wxApp::HandlePropertyChange(WXEvent *event)
 710 {
 711     // by default do nothing special
 712     // TODO: what to do for X11
 713     // XtDispatchEvent((XEvent*) event);
 714     return FALSE;
 715 }
 716
 717 void wxApp::OnIdle(wxIdleEvent& event)
 718 {
 719     static bool s_inOnIdle = FALSE;
 720
 721     // Avoid recursion (via ProcessEvent default case)
 722     if (s_inOnIdle)
 723         return;
 724
 725     s_inOnIdle = TRUE;
 726
 727     // Resend in the main thread events which have been prepared in other
 728     // threads
 729     ProcessPendingEvents();
 730
 731     // 'Garbage' collection of windows deleted with Close()
 732     DeletePendingObjects();
 733
 734     // Send OnIdle events to all windows
 735     bool needMore = SendIdleEvents();
 736
 737     if (needMore)
 738         event.RequestMore(TRUE);
 739
 740     s_inOnIdle = FALSE;
 741 }
 742
 743 void wxApp::WakeUpIdle()
 744 {
 745     // TODO: use wxMotif implementation?
 746
 747     // Wake up the idle handler processor, even if it is in another thread...
 748 }
 749
 750
 751 // Send idle event to all top-level windows
 752 bool wxApp::SendIdleEvents()
 753 {
 754     bool needMore = FALSE;
 755
 756     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 757     while (node)
 758     {
 759         wxWindow* win = node->GetData();
 760         if (SendIdleEvents(win))
 761             needMore = TRUE;
 762         node = node->GetNext();
 763     }
 764
 765     return needMore;
 766 }
 767
 768 // Send idle event to window and all subwindows
 769 bool wxApp::SendIdleEvents(wxWindow* win)
 770 {
 771     bool needMore = FALSE;
 772
 773     wxIdleEvent event;
 774     event.SetEventObject(win);
 775
 776     win->GetEventHandler()->ProcessEvent(event);
 777
 778     if (event.MoreRequested())
 779         needMore = TRUE;
 780
 781     wxWindowListNode* node = win->GetChildren().GetFirst();
 782     while (node)
 783     {
 784         wxWindow* win = (wxWindow*) node->GetData();
 785         if (SendIdleEvents(win))
 786             needMore = TRUE;
 787
 788         node = node->GetNext();
 789     }
 790
 791     win->OnInternalIdle();
 792
 793     return needMore;
 794 }
 795
 796 // Create display, and other initialization
 797 bool wxApp::OnInitGui()
 798 {
 799     // Eventually this line will be removed, but for
 800     // now we don't want to try popping up a dialog
 801     // for error messages.
 802     delete wxLog::SetActiveTarget(new wxLogStderr);
 803
 804     if (!wxAppBase::OnInitGui())
 805         return FALSE;
 806
 807     GetMainColormap( wxApp::GetDisplay() );
 808
 809     m_maxRequestSize = XMaxRequestSize( (Display*) wxApp::GetDisplay() );
 810
 811 #if !wxUSE_NANOX
 812     m_visualInfo = new wxXVisualInfo;
 813     wxFillXVisualInfo( m_visualInfo, (Display*) wxApp::GetDisplay() );
 814 #endif
 815
 816     return TRUE;
 817 }
 818
 819 #if wxUSE_UNICODE
 820
 821 #include <pango/pango.h>
 822 #include <pango/pangox.h>
 823 #include <pango/pangoxft.h>
 824
 825 PangoContext* wxApp::GetPangoContext()
 826 {
 827     static PangoContext *ret = NULL;
 828     if (ret)
 829         return ret;
 830
 831     Display *xdisplay = (Display*) wxApp::GetDisplay();
 832
 833 #if 1
 834     int xscreen = DefaultScreen(xdisplay);
 835     static int use_xft = -1;
 836     if (use_xft == -1)
 837     {
 838         wxString val = wxGetenv( L"GDK_USE_XFT" );
 839         use_xft = (val == L"1");
 840     }
 841
 842     if (use_xft)
 843         ret = pango_xft_get_context( xdisplay, xscreen );
 844     else
 845 #endif
 846         ret = pango_x_get_context( xdisplay );
 847
 848     if (!PANGO_IS_CONTEXT(ret))
 849         wxLogError( wxT("No pango context.") );
 850
 851     return ret;
 852 }
 853 #endif
 854
 855 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 856 {
 857     if (!display) /* Must be called first with non-NULL display */
 858         return m_mainColormap;
 859
 860     int defaultScreen = DefaultScreen((Display*) display);
 861     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 862
 863     Colormap c = DefaultColormapOfScreen(screen);
 864
 865     if (!m_mainColormap)
 866         m_mainColormap = (WXColormap) c;
 867
 868     return (WXColormap) c;
 869 }
 870
 871 Window wxGetWindowParent(Window window)
 872 {
 873     wxASSERT_MSG( window, "invalid window" );
 874
 875     return (Window) 0;
 876
 877     Window parent, root = 0;
 878 #if wxUSE_NANOX
 879     int noChildren = 0;
 880 #else
 881     unsigned int noChildren = 0;
 882 #endif
 883     Window* children = NULL;
 884
 885     // #define XQueryTree(d,w,r,p,c,nc)     GrQueryTree(w,p,c,nc)
 886     int res = 1;
 887 #if !wxUSE_NANOX
 888     res =
 889 #endif
 890         XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 891              & children, & noChildren);
 892     if (children)
 893         XFree(children);
 894     if (res)
 895         return parent;
 896     else
 897         return (Window) 0;
 898 }
 899
 900 void wxApp::Exit()
 901 {
 902     wxApp::CleanUp();
 903
 904     wxAppConsole::Exit();
 905 }
 906
 907 // Yield to other processes
 908
 909 bool wxApp::Yield(bool onlyIfNeeded)
 910 {
 911     // Sometimes only 2 yields seem
 912     // to do the trick, e.g. in the
 913     // progress dialog
 914     int i;
 915     for (i = 0; i < 2; i++)
 916     {
 917         bool s_inYield = FALSE;
 918
 919         if ( s_inYield )
 920         {
 921             if ( !onlyIfNeeded )
 922             {
 923                 wxFAIL_MSG( wxT("wxYield called recursively" ) );
 924             }
 925
 926             return FALSE;
 927         }
 928
 929         s_inYield = TRUE;
 930
 931         // Make sure we have an event loop object,
 932         // or Pending/Dispatch will fail
 933         wxEventLoop* eventLoop = wxEventLoop::GetActive();
 934         wxEventLoop* newEventLoop = NULL;
 935         if (!eventLoop)
 936         {
 937             newEventLoop = new wxEventLoop;
 938             wxEventLoop::SetActive(newEventLoop);
 939         }
 940
 941         // Call dispatch at least once so that sockets
 942         // can be tested
 943         wxTheApp->Dispatch();
 944
 945         while (wxTheApp && wxTheApp->Pending())
 946             wxTheApp->Dispatch();
 947
 948 #if wxUSE_TIMER
 949         wxTimer::NotifyTimers();
 950 #endif
 951         ProcessIdle();
 952
 953         if (newEventLoop)
 954         {
 955             wxEventLoop::SetActive(NULL);
 956             delete newEventLoop;
 957         }
 958
 959         s_inYield = FALSE;
 960     }
 961
 962     return TRUE;
 963 }
 964
 965 #ifdef __WXDEBUG__
 966
 967 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 968 {
 969     // While the GUI isn't working that well, just print out the
 970     // message.
 971 #if 1
 972     wxAppBase::OnAssert(file, line, cond, msg);
 973 #else
 974     wxString msg2;
 975     msg2.Printf("At file %s:%d: %s", file, line, msg);
 976     wxLogDebug(msg2);
 977 #endif
 978 }
 979
 980 #endif // __WXDEBUG__
 981