/*

* Copyright (c) 2006-2007 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:  ?Description

*

*/

#ifndef IRACTIVEIDLEENGNOTIFYHANDLER_H

#define IRACTIVEIDLEENGNOTIFYHANDLER_H

#include "irpubsubkeys.h"

class CIRMetaData;

/**

* Observer interface for CIRActiveIdleEng.

* The observer is notified about the changes in relevant keys through this interface.

*/

NONSHARABLE_CLASS(MIRActiveIdleEngNotifyHandler)

    {

public:

    /**

    * Invoked when a new channel has been tuned into.

    */

    virtual void HandleChannelChangeL() = 0;

    /**

    * Invoked when a new channel has been tuned into.

    * @param    aVolume       The index of the volume level.

    */

    virtual void HandleVolumeChangeL( TInt aVolume ) = 0;

    /**

    * Invoked when a new channel has been tuned into.

    */

    virtual void HandlePlayStopL( TIRStopPlayState aState ) = 0;

   /**

    * Invoked when the application's running state has changed.

    * @param    aRunningState   The new running state.

    */

    virtual void HandleApplicationRunningStateChangeL( 

    			TIRPSApplicationRunningState aRunningState ) = 0;

    /**

     * Invoked when meta data is received.

     *

     * @param   aMetaData       The meta data that was received.

     */

    virtual void HandleMetaDataReceivedL( const CIRMetaData& aMetaData ) = 0;

     /**

     * Invoked when buffering starts or stops 

     *

     * @param   aValue  The state of buffering

     */

    virtual void HandleBufferingStateL(TIRBufferingState aState) = 0;

    };

#endif//IRACTIVEIDLEENGNOTIFYHANDLER_H