/*

* Copyright (c) 2005 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: 

*     CHeadsetStatusObserver functionality.

*

*/

#ifndef __HEADSETOBSERVER_H__

#define __HEADSETOBSERVER_H__

#ifdef __ACCESSORY_FW

// INCLUDES

#include <e32base.h>

#include <AccPolAccessoryMode.h>

// FORWARD DECLARATIONS

class MHeadsetStatusObserver;

class RAccessoryMode;

// CLASS DECLARATION

/**

*   Active object for receiving asynchronous requests

*   from accessory mode change events.

*   Only enabled with __ACCESSORY_FW flag set.

*/

NONSHARABLE_CLASS( CHeadsetStatusObserver ): public CActive

    {

    public:     // Constructors & destructors

        /**

        * Destructor 

        */

        ~CHeadsetStatusObserver();

        /**

        * Symbian two phased constructor.

        */

        static CHeadsetStatusObserver* NewL( RAccessoryMode& aAccMode );

    public:     // New methods

        /**

        * Sets observer through headset status notifications are received.

        * @param    aObserver: Observer

        * @return   None

        */

        void SetObserver( MHeadsetStatusObserver* aObserver );

        /**

        * Activates observing through RAccessoryMode.

        * Method will panic if already active.

        * @param    None

        * @return   None

        */

        void StartObserving();

    private:  // From base classes

        // From CActive

        void RunL();

        // From CActive

        void DoCancel();

        // From CActive

        TInt RunError( TInt aError );

    private:    // New methods

        // Notifies observer from headset status change

        void NotifyObserverL();

        // Notifies observer from error

        void NotifyObserverError( TInt aError );

    private: 

        /**

        * Default Constructor 

        */

        CHeadsetStatusObserver( RAccessoryMode& aAccMode );

        /**

        * Symbian OS 2nd phase constructor 

        */

        void ConstructL();  

    private:

        // headset status observer, not owned

        MHeadsetStatusObserver* iObserver;

        // reference to RAccessoryMode, not owned

        RAccessoryMode& iAccMode;

        // accessory mode

        TAccPolAccessoryMode iAccPolMode;

    };

#endif //__ACCESSORY_FW

#endif //__HEADSETCONTAINER_H__

// End of File