/*

* 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:  CCP DTMF observer. 

*

*/

#ifndef MCCPDTMFOBSERVER_H

#define MCCPDTMFOBSERVER_H

#include <e32base.h>

/**

* CCP DTMF related events observer class.

* This class is used for notifying DTMF specific events.

*

* @since S60 3.2

*/

class MCCPDTMFObserver

    {

public:

    /** DTMF Events */

    enum TCCPDtmfEvent

        {

        /** Unknown */

        ECCPDtmfUnknown = 0,

        /** DTMF sending started manually */

        ECCPDtmfManualStart = 5,

        /** DTMF sending stopped manually */

        ECCPDtmfManualStop = 6,

        /** DTMF sending aborted manually */

        ECCPDtmfManualAbort = 7,

        /** Automatic DTMF sending initialized */

        ECCPDtmfSequenceStart = 9,

        /** Automatic DTMF sending stopped */

        ECCPDtmfSequenceStop = 10,

        /** Automatic DTMF sending aborted */

        ECCPDtmfSequenceAbort = 11,

        /** There was stop mark in DTMF string */

        ECCPDtmfStopInDtmfString,

        /** DTMF sending completed succesfully */

        ECCPDtmfStringSendingCompleted

        };

protected:

    /** 

    * Protects the observer being deleted through the observer interface. 

    * @since S60 3.2

    */

    virtual inline ~MCCPDTMFObserver() {};

public:

    /**

    * HandleDTMFEvents.

    * @since S60 3.2

    * @param aEvent Event type

    * @param aError Error code

    * @param aTone Character

    * @return none

    */

    virtual void HandleDTMFEvent( const MCCPDTMFObserver::TCCPDtmfEvent aEvent,

                                  const TInt aError,

                                  const TChar aTone ) const = 0;

    };

#endif // MCCPDTMFOBSERVER_H

// End of File