/*

* Copyright (c) 2006-2008 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:  Channel property observer.

*

*/

#ifndef MSENSRVPROPERTYHANDLEROBSERVER_H

#define MSENSRVPROPERTYHANDLEROBSERVER_H

#include <e32base.h>

#include "sensrvproperty.h"

#include "sensrvtypes.h"

/**

 * Channel property observer. Callback interface to indicate when a property has been changed.

 *  

 * @lib SensrvClient.lib

 * @since S60 5.0 

 */

class MSensrvPropertyHandlerObserver

    {

    public:

    /**

    * Notification about the changed value of a property.

    *

    * @since S60 5.0

    * @param[in] aChangedProperty Changed property.

    */  

    virtual void PropertyChanged( const TSensrvProperty& aChangedProperty ) = 0;

    /**

    * Property listening failed.

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

    * If error was minor, some property changes have potentially been missed.

    *

    * @since S60 5.0

    * @param[in] aError Error code. 

    */

    virtual void PropertyError( TSensrvErrorSeverity aError ) = 0;

    /**

    * Reopen channel.

    * Data listening and condition listening need restarting

    * 

    * @since S60 5.0    

    * @param aMaxBufferCount New maximum client buffer count

    * @return void 

    */

    virtual void ReopenChannelForPropertyListeningL() = 0;

    /**

    * Notification about change in property setting avaibility.

    *

    * @since S60 5.0

    * @param[in] aIndication holds the new indicator value.

    */

    virtual void SetPropertySuccessIndicationChanged( 

                 TSetPropertySuccessIndicator aIndication ) = 0;

    };

#endif //MSENSRVPROPERTYHANDLEROBSERVER_H