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.             *
 *************************************************************************/

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TGIdleHandler                                                        //
//                                                                      //
// 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;
}