TGIdleHandler.cxx

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// @(#)root/gui:$Id$
// Author: Fons Rademakers   2/8/2004
 
/*************************************************************************
 * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
 
/** \class TGIdleHandler
    \ingroup guiwidgets
 
Handle idle events, i.e. process GUI actions when there is nothing
else anymore to do.
 
*/
 
 
#include "TGIdleHandler.h"
#include "TGWindow.h"
 
 
ClassImp(TGIdleHandler);
 
////////////////////////////////////////////////////////////////////////////////
/// Create idle handler.
 
TGIdleHandler::TGIdleHandler(TGWindow *w) : fWindow(0)
{
   if (w) {
      fWindow = w;
      if (fWindow->GetClient())
         fWindow->GetClient()->AddIdleHandler(this);
   } else
      Error("TGIdleHandler", "window cannot be 0");
}
 
////////////////////////////////////////////////////////////////////////////////
/// Delete idle handler.
 
TGIdleHandler::~TGIdleHandler()
{
   if (fWindow && fWindow->GetClient())
      fWindow->GetClient()->RemoveIdleHandler(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle the idle event. Returns true if the event has been handled,
/// false otherwise.
 
Bool_t TGIdleHandler::HandleEvent()
{
   return (fWindow) ? fWindow->HandleIdleEvent(this) : kFALSE;
}