/*

* Copyright (c) 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:  Channel change observer.

*

*/

#ifndef MSENSRVCHANNELCHANGEHANDLEROBSERVER_H

#define MSENSRVCHANNELCHANGEHANDLEROBSERVER_H

#include <e32base.h>

#include "sensrvtypes.h"

/**

 * Channel change observer. Callback interface to indicate when a channel has been 

 * added or removed

 *  

 * @lib SensrvClient.lib

 * @since S60 5.0 

 */

class MSensrvChannelChangeHandlerObserver

    {

    public:

        /**

        * Indicates channel availability change caused by installation or removal

        * of new software. 

        *

        * @since S60 5.0

        * @param[in] aDetectedChannel Channel information of the channel.

        * @param[in] aChangeType If ESensrvChannelAdded, channel is a newly available

        *                        channel. 

        *                        If ESensrvChannelRemoved, channel was removed and is  

        *                        no longer available.

        */

        virtual void ChannelChangeDetected( const TSensrvChannelInfo& aDetectedChannel,

                                            TSensrvChannelChangeType aChangeType ) = 0;

        /**

        * Channel change listening failed.

        * If error was fatal, sensor server session has also been terminated, and

        * related finder is no longer usable.

        * If error was minor, some notifications have potentially been lost.

        *

        * @since S60 5.0

        * @param[in] aError Error code.

        */

        virtual void ChannelDetectionError( TSensrvErrorSeverity aError ) = 0;

    };

#endif //MSENSRVCHANNELCHANGEHANDLEROBSERVER_H