/*

* Copyright (c) 2010 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:  Header file for property observer

*

*/

#ifndef CAUTOAUDIOASYPROPERTYOBSERVER_H__

#define CAUTOAUDIOASYPROPERTYOBSERVER_H__

#include <e32base.h>

#include <e32property.h>

class MAutoAudioAsyPropertyListener;

/**

 * This class follows PS key (informs when RTP streaming is enabled or disabled).

 */

NONSHARABLE_CLASS(CAutoAudioAsyPropertyObserver): public CActive

    {

public:

    /**

     * Two-phase constructor

     */

    static CAutoAudioAsyPropertyObserver* NewL ( TUid aCategory, TUint aKey, MAutoAudioAsyPropertyListener& aListener ); 

    virtual ~CAutoAudioAsyPropertyObserver ();

protected:

    // CActive

    void DoCancel ();

    void RunL ();

    TInt RunError ( TInt aError );

private:

    CAutoAudioAsyPropertyObserver ( TUid aCategory, TUint aKey, MAutoAudioAsyPropertyListener& aListener );

private:

    /**

     * Handle to P&S property.

     * Own.

     */

    RProperty iProperty;

    /**

     * The UID of the property we are listening for

     */

    TUid iCategory;

    /**

     * The key we are listening for

     */

    TUint iKey;

    /**

     * Reference to listener class.

     * Now own.

     */

    MAutoAudioAsyPropertyListener& iListener;

    };

#endif // CAUTOAUDIOASYPROPERTYOBSERVER_H__