/*

* Copyright (c) 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:  Observer interface for handling Dtmf events

*

*/

#ifndef MCCEDTMFOBSERVER_H

#define MCCEDTMFOBSERVER_H

#include <e32base.h>

/**

 *  Observer interface for handling Dtmf events

 *

 *  @lib cce.dll

 *  @since S60 v3.2

 */

class MCCEDtmfObserver

    {

public:

    /** Dtmf events */

    enum TCCEDtmfEvent

        {

        ECCEDtmfUnknown = 0,

        ECCEDtmfManualStart = 5,

        ECCEDtmfManualStop = 6,

        ECCEDtmfManualAbort = 7,

        ECCEDtmfSequenceStart = 9,

        ECCEDtmfSequenceStop = 10,

        ECCEDtmfSequenceAbort = 11,

        ECCEDtmfStopInDtmfString,

        ECCEDtmfStringSendingCompleted

        };

    /**

    * All the occurred DTMF events are notified through this interface

    *

    * @since S60 3.2

    * @param aEvent Event code

    * @param aError Error code

    * @param aTone tone 

    * @return none

    */

    virtual void HandleDTMFEvent( const MCCEDtmfObserver::TCCEDtmfEvent aEvent, 

                                  const TInt aError, 

                                  const TChar aTone ) = 0;

    };

#endif // MCCEDTMFOBSERVER_H