/*

* Copyright (c) 2004 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:   Defines class CNcnSystemAgentObserver.

*

*/

#ifndef NCNSYSTEMAGENTOBSERVER_H

#define NCNSYSTEMAGENTOBSERVER_H

//  INCLUDES

#include    <e32base.h>

#include    <savarset.h>       // RSAVarChangeNotify

// CLASS DECLARATION

class CNcnModelBase;

/**

*  Listens to the Phone idle status through the System Agent session.

*/

class CNcnSystemAgentObserver : public CActive

    {

    public:  // Constructors and destructor

        /**

        * C++ default constructor.

        */

        CNcnSystemAgentObserver( CNcnModelBase* aModel );

        /**

        * Two-phased constructor.

        */

        static CNcnSystemAgentObserver* NewL( CNcnModelBase* aModel );

        /**

        * Destructor.

        */

        virtual ~CNcnSystemAgentObserver();

    public:

        /*

        * Through this System Agent is notified about state changes.

        */

        void NotifySystemAgent( const TUid& aVariable, const TInt aState );

        /**

        * By this method the user of this class orders the observer to start receiving events.

        */

        void IssueRequest();

    private:

        /**

        * By default Symbian OS constructor is private.

        */

        void ConstructL();

        // By default, prohibit copy constructor

        CNcnSystemAgentObserver( const CNcnSystemAgentObserver& );

        // Prohibit assigment operator

        CNcnSystemAgentObserver& operator= ( const CNcnSystemAgentObserver& );

        /**

        * Cancels the request.

        */

        void DoCancel();

        /**

        * Handles the event.

        */

        void RunL();

    private:    // Data

        // For being notified by System Agent

        RSystemAgent iSystemAgent;

        // For notifying System Agent

        RSAVarChangeNotify iSavar;

        // A pointer to the event monitor.

        CNcnModelBase* iModel;

        // The event from System Agent.

        TSysAgentEvent  iSAEvent;

        // Stores the phone idle state status

        TInt iPhoneIdleState;

        // Stores the autolock status

        TInt iAutolockStatus;

        // Stores the current call status

        TInt iCurrentCallStatus;

    };

#endif      // NCNSYSTEMAGENTOBSERVER_H

// End of File