/*

* Copyright (c) 2002-2004 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

* which accompanies this distribution, and is available

* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Abstract interface for find media files suitable to be 

*  				set as an alert tone in Profiles.

*

*/

#ifndef MPROENGALERTTONESEEKER_H

#define MPROENGALERTTONESEEKER_H

//  INCLUDES

#include <e32def.h>

// FORWARD DECLARATIONS

class MProEngAlertToneSeekerExt;

class MProEngAlertToneSeekerObserver;

// CLASS DECLARATION

/**

*  This class can be used to find media files suitable to be set as an alert

*  tone in Profiles.

*

*  @lib ProfileEngine.lib

*  @since Series 60 3.1

*/

class MProEngAlertToneSeeker

    {

    public: // New functions

        /**

        * Asynchronous method that searches all the tone files that can be used

        * as alert tones in Profiles. The resulting list of the tone paths is

        * delivered to the MProEngAlertToneSeekerObserver.

        * This is a very long lasting operation (~minutes), so this shouldn't

        * be performed too often.

        * @since S 60 3.1

        * @param aObserver Reference to the client-implemented observer which

        *        will get the list of tones after the list has been constructed.

        */

        virtual void FetchAlertToneListL(

                MProEngAlertToneSeekerObserver& aObserver ) = 0;

        /**

         * Cancels the asynchronous fetch operation.

         * @since S60 3.1

         */

        virtual void CancelFetch() = 0;

    public:

        /**

        * Destructor.

        */

        virtual ~MProEngAlertToneSeeker() {}

    private: // Extension interface

        /**

        * This member is internal and not intended for use.

        */

        virtual MProEngAlertToneSeekerExt* Extension() { return NULL; }

    };

#endif      // MPROENGALERTTONESEEKER_H

// End of File