/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Event listener implementation presence

*

*/

#ifndef CSERVICEWIDGETTIMER_H

#define CSERVICEWIDGETTIMER_H

#include <e32base.h>

// forward declaration

class MServiceWidgetTimerObserver;

// class declaration

/**

 * @class timer class

 * @since 5.0

 */

class CServiceWidgetTimer : public CActive

    {

public :

        // Constructor

        /**

         * Creates a new CServiceWidgetTimer.

         * @param aObserver, reference to timer 

         * @return New instance of this class         

         */

        static CServiceWidgetTimer* NewL(MServiceWidgetTimerObserver& aObserver );

          /**

           * Standard C++ destructor.

           */

         ~CServiceWidgetTimer();

         /**

         * start listening

         * @param a time interval

         */

         void StartListening(TTimeIntervalMicroSeconds32 anInterval);

         /**

         * stop listening

         */

         void StopListening();     

private : // From CActive

        /**

        *  RunL

        */

        void RunL();  

        /**

        *  DoCancel

        */

        void DoCancel();

private: // Implementation

       /**

        * Standard C++ constructor

        * @param aObserver, reference to timer

       */

        CServiceWidgetTimer(MServiceWidgetTimerObserver& aObserver );

       /**

        * Performs the 2nd phase of construction.

        */

       void ConstructL();

private :

       	// not owns : reference to contact update observer

        MServiceWidgetTimerObserver& iObserver;

		/**

		 *  owns : timer to trigger message queue uptation checking

		 */

		RTimer iTimer;

	    };

#endif /*CSERVICEWIDGETTIMER_H*/

//end of file