/*

* Copyright (c) 2002-2006 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: 

*     This class defines a audio volume change observer interface.

*

*/

#ifndef __MVRVOLUMECHANGEOBSERVER_H__

#define __MVRVOLUMECHANGEOBSERVER_H__

// INCLUDES

#include <e32def.h>

// CLASS DEFINITION

/**

* This class defines a audio volume change observer interface.

*/

class MVRVolumeChangeObserver 

	{

	public: // new methods

		/**

		* Called to notify a change in volume settings.

		* @param aStep Volume level in steps

		* @param aMaxSteps How many steps there are (10 usually).

		*/

		virtual void SetVolume( TInt aStep, TInt aMaxSteps ) = 0;

		/***

		* Indicates if volume can be set, because rinto tone

		* volume change has no effect if the tone is playing.

		*/

		virtual TBool CanSetVolume() = 0;

	};

#endif // __MVRVOLUMECHANGEOBSERVER_H__