/*

* Copyright (c) 2005-2007 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:  Monitors the call.

*

*/

#ifndef MUSAOCALLMONITOR_H

#define MUSPROPERTYMONITOR_H

#include "musunittesting.h"

#include "mmuscallstateobserver.h"

#include <etelmm.h>

#include <e32base.h>

#include <e32property.h>

class CMusManager;

/**

 * Monitor, which observes status of current cs call  

 *

 * @lib musaoplugin.dll

 */

class CMusPropertyMonitor : public CActive

    {

    public: // constructors and destructor

        /**

         * Two-phased constructor. Leaves on failure.

         */

        static CMusPropertyMonitor* NewL( MMusCallStateObserver& aCallStateObserver );

        /**

         * Destructor.

         */

        ~CMusPropertyMonitor();

    public: // other public functions

        /*

         * Checks from P/S Keys about call state

         * @return EFalse if call state is ENoCall otherwise ETrue  

         */

        TBool IsCallConnected();

    private:

        /**

         * C++ constructor.

         */

        CMusPropertyMonitor( MMusCallStateObserver& aCallStateObserve );

        /**

         * Symbian 2nd-phase constructor.

         */

        void ConstructL();

    private:

        /**

         * Handles an active object's request completion event.

         */

        void RunL();

        /**

         * cancels of an outstanding request

         */        

        void DoCancel();

         /*

         * Handles a leave occurring in the request completion 

         * event handler RunL().

         * Always return KErrNone since it must handle this error

         * if it comes to this place.

         */

        TInt RunError( TInt aError );

    private:    

        /**

         * Instance of RProperty.

         */

        RProperty iPropertyEvent;    

        /*

         * Reference of callstate observer not owned

         */

        MMusCallStateObserver& iCallStateObserver;

        MUS_UNITTEST( UT_CMusPropertyMonitor )

    };

#endif // MUSPROPERTYMONITOR_H