src/x11/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/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 // for compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/app.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/hash.h"
  19     #include "wx/intl.h"
  20     #include "wx/log.h"
  21     #include "wx/utils.h"
  22     #include "wx/frame.h"
  23     #include "wx/icon.h"
  24     #include "wx/dialog.h"
  25     #include "wx/timer.h"
  26     #include "wx/memory.h"
  27 #endif
  28
  29 #include "wx/gdicmn.h"
  30 #include "wx/module.h"
  31 #include "wx/evtloop.h"
  32 #include "wx/filename.h"
  33
  34 #include "wx/univ/theme.h"
  35 #include "wx/univ/renderer.h"
  36
  37 #if wxUSE_THREADS
  38     #include "wx/thread.h"
  39 #endif
  40
  41 #include "wx/x11/private.h"
  42
  43 #include <string.h>
  44
  45 //------------------------------------------------------------------------
  46 //   global data
  47 //------------------------------------------------------------------------
  48
  49 wxWindowHash *wxWidgetHashTable = NULL;
  50 wxWindowHash *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(wxAppBase::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     wxString displayName;
 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(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;
 170     if ( displayName.empty() )
 171         xdisplay = XOpenDisplay( NULL );
 172     else
 173         xdisplay = XOpenDisplay( displayName.ToAscii() );
 174     if (!xdisplay)
 175     {
 176         wxLogError( _("wxWidgets could not open display. Exiting.") );
 177         return false;
 178     }
 179
 180     if (syncDisplay)
 181         XSynchronize(xdisplay, True);
 182
 183     ms_display = (WXDisplay*) xdisplay;
 184
 185     XSelectInput( xdisplay, XDefaultRootWindow(xdisplay), PropertyChangeMask);
 186
 187     // Misc.
 188     wxSetDetectableAutoRepeat( true );
 189
 190     if ( !wxAppBase::Initialize(argC, argV) )
 191     {
 192         XCloseDisplay(xdisplay);
 193
 194         return false;
 195     }
 196
 197 #if wxUSE_UNICODE
 198     // Glib's type system required by Pango
 199     g_type_init();
 200 #endif
 201
 202 #if wxUSE_INTL
 203     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 204 #endif
 205
 206     wxWidgetHashTable = new wxWindowHash;
 207     wxClientWidgetHashTable = new wxWindowHash;
 208
 209     return true;
 210 }
 211
 212 void wxApp::CleanUp()
 213 {
 214     delete wxWidgetHashTable;
 215     wxWidgetHashTable = NULL;
 216     delete wxClientWidgetHashTable;
 217     wxClientWidgetHashTable = NULL;
 218
 219     wxAppBase::CleanUp();
 220 }
 221
 222 wxApp::wxApp()
 223 {
 224     // TODO: parse the command line
 225     argc = 0;
 226     argv = NULL;
 227
 228     m_mainColormap = (WXColormap) NULL;
 229     m_topLevelWidget = (WXWindow) NULL;
 230     m_maxRequestSize = 0;
 231     m_showIconic = false;
 232     m_initialSize = wxDefaultSize;
 233
 234 #if !wxUSE_NANOX
 235     m_visualInfo = NULL;
 236 #endif
 237 }
 238
 239 wxApp::~wxApp()
 240 {
 241 #if !wxUSE_NANOX
 242     delete m_visualInfo;
 243 #endif
 244 }
 245
 246 #if !wxUSE_NANOX
 247
 248 //-----------------------------------------------------------------------
 249 // X11 predicate function for exposure compression
 250 //-----------------------------------------------------------------------
 251
 252 struct wxExposeInfo
 253 {
 254     Window window;
 255     Bool found_non_matching;
 256 };
 257
 258 extern "C"
 259 Bool wxX11ExposePredicate (Display *display, XEvent *xevent, XPointer arg)
 260 {
 261     wxExposeInfo *info = (wxExposeInfo*) arg;
 262
 263     if (info->found_non_matching)
 264        return FALSE;
 265
 266     if (xevent->xany.type != Expose)
 267     {
 268         info->found_non_matching = true;
 269         return FALSE;
 270     }
 271
 272     if (xevent->xexpose.window != info->window)
 273     {
 274         info->found_non_matching = true;
 275         return FALSE;
 276     }
 277
 278     return TRUE;
 279 }
 280
 281 #endif // wxUSE_NANOX
 282
 283 //-----------------------------------------------------------------------
 284 // Processes an X event, returning true if the event was processed.
 285 //-----------------------------------------------------------------------
 286
 287 bool wxApp::ProcessXEvent(WXEvent* _event)
 288 {
 289     XEvent* event = (XEvent*) _event;
 290
 291     wxWindow* win = NULL;
 292     Window window = XEventGetWindow(event);
 293 #if 0
 294     Window actualWindow = window;
 295 #endif
 296
 297     // Find the first wxWindow that corresponds to this event window
 298     // Because we're receiving events after a window
 299     // has been destroyed, assume a 1:1 match between
 300     // Window and wxWindow, so if it's not in the table,
 301     // it must have been destroyed.
 302
 303     win = wxGetWindowFromTable(window);
 304     if (!win)
 305     {
 306 #if wxUSE_TWO_WINDOWS
 307         win = wxGetClientWindowFromTable(window);
 308         if (!win)
 309 #endif
 310             return false;
 311     }
 312
 313 #ifdef __WXDEBUG__
 314     wxString windowClass = win->GetClassInfo()->GetClassName();
 315 #endif
 316
 317     switch (event->type)
 318     {
 319         case Expose:
 320         {
 321 #if wxUSE_TWO_WINDOWS && !wxUSE_NANOX
 322             if (event->xexpose.window != (Window)win->GetClientAreaWindow())
 323             {
 324                 XEvent tmp_event;
 325                 wxExposeInfo info;
 326                 info.window = event->xexpose.window;
 327                 info.found_non_matching = false;
 328                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, wxX11ExposePredicate, (XPointer) &info ))
 329                 {
 330                     // Don't worry about optimizing redrawing the border etc.
 331                 }
 332                 win->NeedUpdateNcAreaInIdle();
 333             }
 334             else
 335 #endif
 336             {
 337                 win->GetUpdateRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 338                                               XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 339                 win->GetClearRegion().Union( XExposeEventGetX(event), XExposeEventGetY(event),
 340                                          XExposeEventGetWidth(event), XExposeEventGetHeight(event));
 341
 342 #if !wxUSE_NANOX
 343                 XEvent tmp_event;
 344                 wxExposeInfo info;
 345                 info.window = event->xexpose.window;
 346                 info.found_non_matching = false;
 347                 while (XCheckIfEvent( wxGlobalDisplay(), &tmp_event, wxX11ExposePredicate, (XPointer) &info ))
 348                 {
 349                     win->GetUpdateRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 350                                                   tmp_event.xexpose.width, tmp_event.xexpose.height );
 351
 352                     win->GetClearRegion().Union( tmp_event.xexpose.x, tmp_event.xexpose.y,
 353                                                  tmp_event.xexpose.width, tmp_event.xexpose.height );
 354                 }
 355 #endif
 356
 357                 // This simplifies the expose and clear areas to simple
 358                 // rectangles.
 359                 win->GetUpdateRegion() = win->GetUpdateRegion().GetBox();
 360                 win->GetClearRegion() = win->GetClearRegion().GetBox();
 361
 362                 // If we only have one X11 window, always indicate
 363                 // that borders might have to be redrawn.
 364                 if (win->GetMainWindow() == win->GetClientAreaWindow())
 365                     win->NeedUpdateNcAreaInIdle();
 366
 367                 // Only erase background, paint in idle time.
 368                 win->SendEraseEvents();
 369
 370                 // EXPERIMENT
 371                 //win->Update();
 372             }
 373
 374             return true;
 375         }
 376
 377 #if !wxUSE_NANOX
 378         case GraphicsExpose:
 379         {
 380             wxLogTrace( _T("expose"), _T("GraphicsExpose from %s"), win->GetName().c_str());
 381
 382             win->GetUpdateRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 383                                           event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 384
 385             win->GetClearRegion().Union( event->xgraphicsexpose.x, event->xgraphicsexpose.y,
 386                                          event->xgraphicsexpose.width, event->xgraphicsexpose.height);
 387
 388             if (event->xgraphicsexpose.count == 0)
 389             {
 390                 // Only erase background, paint in idle time.
 391                 win->SendEraseEvents();
 392                 // win->Update();
 393             }
 394
 395             return true;
 396         }
 397 #endif
 398
 399         case KeyPress:
 400         {
 401             if (!win->IsEnabled())
 402                 return false;
 403
 404             wxKeyEvent keyEvent(wxEVT_KEY_DOWN);
 405             wxTranslateKeyEvent(keyEvent, win, window, event);
 406
 407             // wxLogDebug( "OnKey from %s", win->GetName().c_str() );
 408
 409             // We didn't process wxEVT_KEY_DOWN, so send wxEVT_CHAR
 410             if (win->GetEventHandler()->ProcessEvent( keyEvent ))
 411                 return true;
 412
 413             keyEvent.SetEventType(wxEVT_CHAR);
 414             // Do the translation again, retaining the ASCII
 415             // code.
 416             wxTranslateKeyEvent(keyEvent, win, window, event, true);
 417             if (win->GetEventHandler()->ProcessEvent( keyEvent ))
 418                 return true;
 419
 420             if ( (keyEvent.m_keyCode == WXK_TAB) &&
 421                  win->GetParent() && (win->GetParent()->HasFlag( wxTAB_TRAVERSAL)) )
 422             {
 423                 wxNavigationKeyEvent new_event;
 424                 new_event.SetEventObject( win->GetParent() );
 425                 /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
 426                 new_event.SetDirection( (keyEvent.m_keyCode == WXK_TAB) );
 427                 /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
 428                 new_event.SetWindowChange( keyEvent.ControlDown() );
 429                 new_event.SetCurrentFocus( win );
 430                 return win->GetParent()->GetEventHandler()->ProcessEvent( new_event );
 431             }
 432
 433             return false;
 434         }
 435         case KeyRelease:
 436         {
 437             if (!win->IsEnabled())
 438                 return false;
 439
 440             wxKeyEvent keyEvent(wxEVT_KEY_UP);
 441             wxTranslateKeyEvent(keyEvent, win, window, event);
 442
 443             return win->GetEventHandler()->ProcessEvent( keyEvent );
 444         }
 445         case ConfigureNotify:
 446         {
 447 #if wxUSE_NANOX
 448             if (event->update.utype == GR_UPDATE_SIZE)
 449 #endif
 450             {
 451                 wxTopLevelWindow *tlw = wxDynamicCast(win, wxTopLevelWindow);
 452                 if ( tlw )
 453                 {
 454                     tlw->SetConfigureGeometry( XConfigureEventGetX(event), XConfigureEventGetY(event),
 455                         XConfigureEventGetWidth(event), XConfigureEventGetHeight(event) );
 456                 }
 457
 458                 if ( tlw && tlw->IsShown() )
 459                 {
 460                     tlw->SetNeedResizeInIdle();
 461                 }
 462                 else
 463                 {
 464                     wxSizeEvent sizeEvent( wxSize(XConfigureEventGetWidth(event), XConfigureEventGetHeight(event)), win->GetId() );
 465                     sizeEvent.SetEventObject( win );
 466
 467                     return win->GetEventHandler()->ProcessEvent( sizeEvent );
 468                 }
 469             }
 470             return false;
 471         }
 472 #if !wxUSE_NANOX
 473         case PropertyNotify:
 474         {
 475             //wxLogDebug("PropertyNotify: %s", windowClass.c_str());
 476             return HandlePropertyChange(_event);
 477         }
 478         case ClientMessage:
 479         {
 480             if (!win->IsEnabled())
 481                 return false;
 482
 483             Atom wm_delete_window = XInternAtom(wxGlobalDisplay(), "WM_DELETE_WINDOW", True);
 484             Atom wm_protocols = XInternAtom(wxGlobalDisplay(), "WM_PROTOCOLS", True);
 485
 486             if (event->xclient.message_type == wm_protocols)
 487             {
 488                 if ((Atom) (event->xclient.data.l[0]) == wm_delete_window)
 489                 {
 490                     win->Close(false);
 491                     return true;
 492                 }
 493             }
 494             return false;
 495         }
 496 #if 0
 497         case DestroyNotify:
 498         {
 499             printf( "destroy from %s\n", win->GetName().c_str() );
 500             break;
 501         }
 502         case CreateNotify:
 503         {
 504             printf( "create from %s\n", win->GetName().c_str() );
 505             break;
 506         }
 507         case MapRequest:
 508         {
 509             printf( "map request from %s\n", win->GetName().c_str() );
 510             break;
 511         }
 512         case ResizeRequest:
 513         {
 514             printf( "resize request from %s\n", win->GetName().c_str() );
 515
 516             Display *disp = (Display*) wxGetDisplay();
 517             XEvent report;
 518
 519             //  to avoid flicker
 520             report = * event;
 521             while( XCheckTypedWindowEvent (disp, actualWindow, ResizeRequest, &report));
 522
 523             wxSize sz = win->GetSize();
 524             wxSizeEvent sizeEvent(sz, win->GetId());
 525             sizeEvent.SetEventObject(win);
 526
 527             return win->GetEventHandler()->ProcessEvent( sizeEvent );
 528         }
 529 #endif
 530 #endif
 531 #if wxUSE_NANOX
 532         case GR_EVENT_TYPE_CLOSE_REQ:
 533         {
 534             if (win)
 535             {
 536                 win->Close(false);
 537                 return true;
 538             }
 539             return false;
 540             break;
 541         }
 542 #endif
 543         case EnterNotify:
 544         case LeaveNotify:
 545         case ButtonPress:
 546         case ButtonRelease:
 547         case MotionNotify:
 548         {
 549             if (!win->IsEnabled())
 550                 return false;
 551
 552             // Here we check if the top level window is
 553             // disabled, which is one aspect of modality.
 554             wxWindow *tlw = win;
 555             while (tlw && !tlw->IsTopLevel())
 556                 tlw = tlw->GetParent();
 557             if (tlw && !tlw->IsEnabled())
 558                 return false;
 559
 560             if (event->type == ButtonPress)
 561             {
 562                 if ((win != wxWindow::FindFocus()) && win->AcceptsFocus())
 563                 {
 564                     // This might actually be done in wxWindow::SetFocus()
 565                     // and not here. TODO.
 566                     g_prevFocus = wxWindow::FindFocus();
 567                     g_nextFocus = win;
 568
 569                     wxLogTrace( _T("focus"), _T("About to call SetFocus on %s of type %s due to button press"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 570
 571                     // Record the fact that this window is
 572                     // getting the focus, because we'll need to
 573                     // check if its parent is getting a bogus
 574                     // focus and duly ignore it.
 575                     // TODO: may need to have this code in SetFocus, too.
 576                     extern wxWindow* g_GettingFocus;
 577                     g_GettingFocus = win;
 578                     win->SetFocus();
 579                 }
 580             }
 581
 582 #if !wxUSE_NANOX
 583             if (event->type == LeaveNotify || event->type == EnterNotify)
 584             {
 585                 // Throw out NotifyGrab and NotifyUngrab
 586                 if (event->xcrossing.mode != NotifyNormal)
 587                     return false;
 588             }
 589 #endif
 590             wxMouseEvent wxevent;
 591             wxTranslateMouseEvent(wxevent, win, window, event);
 592             return win->GetEventHandler()->ProcessEvent( wxevent );
 593         }
 594         case FocusIn:
 595 #if !wxUSE_NANOX
 596             if ((event->xfocus.detail != NotifyPointer) &&
 597                 (event->xfocus.mode == NotifyNormal))
 598 #endif
 599             {
 600                 wxLogTrace( _T("focus"), _T("FocusIn from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 601
 602                 extern wxWindow* g_GettingFocus;
 603                 if (g_GettingFocus && g_GettingFocus->GetParent() == win)
 604                 {
 605                     // Ignore this, this can be a spurious FocusIn
 606                     // caused by a child having its focus set.
 607                     g_GettingFocus = NULL;
 608                     wxLogTrace( _T("focus"), _T("FocusIn from %s of type %s being deliberately ignored"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 609                     return true;
 610                 }
 611                 else
 612                 {
 613                     wxFocusEvent focusEvent(wxEVT_SET_FOCUS, win->GetId());
 614                     focusEvent.SetEventObject(win);
 615                     focusEvent.SetWindow( g_prevFocus );
 616                     g_prevFocus = NULL;
 617
 618                     return win->GetEventHandler()->ProcessEvent(focusEvent);
 619                 }
 620             }
 621             return false;
 622
 623         case FocusOut:
 624 #if !wxUSE_NANOX
 625             if ((event->xfocus.detail != NotifyPointer) &&
 626                 (event->xfocus.mode == NotifyNormal))
 627 #endif
 628             {
 629                 wxLogTrace( _T("focus"), _T("FocusOut from %s of type %s"), win->GetName().c_str(), win->GetClassInfo()->GetClassName() );
 630
 631                 wxFocusEvent focusEvent(wxEVT_KILL_FOCUS, win->GetId());
 632                 focusEvent.SetEventObject(win);
 633                 focusEvent.SetWindow( g_nextFocus );
 634                 g_nextFocus = NULL;
 635                 return win->GetEventHandler()->ProcessEvent(focusEvent);
 636             }
 637             return false;
 638
 639 #ifdef __WXDEBUG__
 640         default:
 641             //wxString eventName = wxGetXEventName(XEvent& event);
 642             //wxLogDebug(wxT("Event %s not handled"), eventName.c_str());
 643             break;
 644 #endif // __WXDEBUG__
 645     }
 646
 647     return false;
 648 }
 649
 650 // This should be redefined in a derived class for
 651 // handling property change events for XAtom IPC.
 652 bool wxApp::HandlePropertyChange(WXEvent *event)
 653 {
 654     // by default do nothing special
 655     // TODO: what to do for X11
 656     // XtDispatchEvent((XEvent*) event);
 657     return false;
 658 }
 659
 660 void wxApp::WakeUpIdle()
 661 {
 662     // TODO: use wxMotif implementation?
 663
 664     // Wake up the idle handler processor, even if it is in another thread...
 665 }
 666
 667
 668 // Create display, and other initialization
 669 bool wxApp::OnInitGui()
 670 {
 671     // Eventually this line will be removed, but for
 672     // now we don't want to try popping up a dialog
 673     // for error messages.
 674     delete wxLog::SetActiveTarget(new wxLogStderr);
 675
 676     if (!wxAppBase::OnInitGui())
 677         return false;
 678
 679     GetMainColormap( wxApp::GetDisplay() );
 680
 681     m_maxRequestSize = XMaxRequestSize( (Display*) wxApp::GetDisplay() );
 682
 683 #if !wxUSE_NANOX
 684     m_visualInfo = new wxXVisualInfo;
 685     wxFillXVisualInfo( m_visualInfo, (Display*) wxApp::GetDisplay() );
 686 #endif
 687
 688     return true;
 689 }
 690
 691 #if wxUSE_UNICODE
 692
 693 #include <pango/pango.h>
 694 #include <pango/pangox.h>
 695 #ifdef HAVE_PANGO_XFT
 696     #include <pango/pangoxft.h>
 697 #endif
 698
 699 PangoContext* wxApp::GetPangoContext()
 700 {
 701     static PangoContext *ret = NULL;
 702     if (ret)
 703         return ret;
 704
 705     Display *xdisplay = (Display*) wxApp::GetDisplay();
 706
 707 #ifdef HAVE_PANGO_XFT
 708     int xscreen = DefaultScreen(xdisplay);
 709     static int use_xft = -1;
 710     if (use_xft == -1)
 711     {
 712         wxString val = wxGetenv( L"GDK_USE_XFT" );
 713         use_xft = (val == L"1");
 714     }
 715
 716     if (use_xft)
 717         ret = pango_xft_get_context( xdisplay, xscreen );
 718     else
 719 #endif
 720         ret = pango_x_get_context( xdisplay );
 721
 722     if (!PANGO_IS_CONTEXT(ret))
 723         wxLogError( wxT("No pango context.") );
 724
 725     return ret;
 726 }
 727 #endif
 728
 729 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 730 {
 731     if (!display) /* Must be called first with non-NULL display */
 732         return m_mainColormap;
 733
 734     int defaultScreen = DefaultScreen((Display*) display);
 735     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 736
 737     Colormap c = DefaultColormapOfScreen(screen);
 738
 739     if (!m_mainColormap)
 740         m_mainColormap = (WXColormap) c;
 741
 742     return (WXColormap) c;
 743 }
 744
 745 Window wxGetWindowParent(Window window)
 746 {
 747     wxASSERT_MSG( window, _T("invalid window") );
 748
 749     return (Window) 0;
 750
 751 #ifndef __VMS
 752    // VMS chokes on unreacheable code
 753    Window parent, root = 0;
 754 #if wxUSE_NANOX
 755     int noChildren = 0;
 756 #else
 757     unsigned int noChildren = 0;
 758 #endif
 759     Window* children = NULL;
 760
 761     // #define XQueryTree(d,w,r,p,c,nc)     GrQueryTree(w,p,c,nc)
 762     int res = 1;
 763 #if !wxUSE_NANOX
 764     res =
 765 #endif
 766         XQueryTree((Display*) wxGetDisplay(), window, & root, & parent,
 767              & children, & noChildren);
 768     if (children)
 769         XFree(children);
 770     if (res)
 771         return parent;
 772     else
 773         return (Window) 0;
 774 #endif
 775 }
 776
 777 void wxApp::Exit()
 778 {
 779     wxApp::CleanUp();
 780
 781     wxAppConsole::Exit();
 782 }
 783
 784 // Yield to other processes
 785
 786 bool wxApp::Yield(bool onlyIfNeeded)
 787 {
 788     // Sometimes only 2 yields seem
 789     // to do the trick, e.g. in the
 790     // progress dialog
 791     int i;
 792     for (i = 0; i < 2; i++)
 793     {
 794         static bool s_inYield = false;
 795
 796         if ( s_inYield )
 797         {
 798             if ( !onlyIfNeeded )
 799             {
 800                 wxFAIL_MSG( wxT("wxYield called recursively" ) );
 801             }
 802
 803             return false;
 804         }
 805
 806         s_inYield = true;
 807
 808         // Make sure we have an event loop object,
 809         // or Pending/Dispatch will fail
 810         wxEventLoop* eventLoop = wxEventLoop::GetActive();
 811         wxEventLoop* newEventLoop = NULL;
 812         if (!eventLoop)
 813         {
 814             newEventLoop = new wxEventLoop;
 815             wxEventLoop::SetActive(newEventLoop);
 816         }
 817
 818         // Call dispatch at least once so that sockets
 819         // can be tested
 820         wxTheApp->Dispatch();
 821
 822         while (wxTheApp && wxTheApp->Pending())
 823             wxTheApp->Dispatch();
 824
 825 #if wxUSE_TIMER
 826         wxTimer::NotifyTimers();
 827 #endif
 828         ProcessIdle();
 829
 830         if (newEventLoop)
 831         {
 832             wxEventLoop::SetActive(NULL);
 833             delete newEventLoop;
 834         }
 835
 836         s_inYield = false;
 837     }
 838
 839     return true;
 840 }
 841
 842 #ifdef __WXDEBUG__
 843
 844 void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg)
 845 {
 846     // While the GUI isn't working that well, just print out the
 847     // message.
 848 #if 1
 849     wxAppBase::OnAssert(file, line, cond, msg);
 850 #else
 851     wxString msg2;
 852     msg2.Printf("At file %s:%d: %s", file, line, msg);
 853     wxLogDebug(msg2);
 854 #endif
 855 }
 856
 857 #endif // __WXDEBUG__