/*

* 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:  System Agent keys change observer

*

*/

#ifndef CIMPSSYSTEMNOTFIERSYSTEMAGENT_H

#define CIMPSSYSTEMNOTFIERSYSTEMAGENT_H

//  INCLUDES

#include <e32base.h>        // CActive

#include <saclient.h>       // RSystemAgent

#include "MIMPSSystemNotifier.h"

// FORWARD DECLARATIONS

class MIMPSSystemNotifierObserver;

// CLASS DECLARATION

/**

*  Implementation of the System Agent change observer

*

*  @since 2.6

*/

NONSHARABLE_CLASS( CIMPSSystemNotifierSystemAgent ) : public CActive,

        public MIMPSSystemNotifier

    {

public:  // Constructors and destructor

    /**

    * Two-phased constructor.

    * @param aObserver Observer to be informed when observed system key changes

    */

    static CIMPSSystemNotifierSystemAgent* NewL( MIMPSSystemNotifierObserver& aObserver,

    const TUid aKey );

    /**

    * Destructor.

    */

    virtual ~CIMPSSystemNotifierSystemAgent();

protected:     // from MIMPSSystemNotifier

    /**

    * @see MIMPSSystemNotifier

    */

    TInt Subscribe();

    /**

    * @see MIMPSSystemNotifier

    */

    void UnSubscribe();

    /**

    * @see MIMPSSystemNotifier

    */

    TInt GetIntKey( TInt& aValue );

protected:  // Functions from base classes

    /**

    * From CActive

    */

    void RunL();

    /**

    * From CActive

    */

    void DoCancel();

private:

    /**

    * C++ default constructor.

    */

    CIMPSSystemNotifierSystemAgent( MIMPSSystemNotifierObserver& aObserver,

                                    const TUid aKey );

    /**

    * Symbian 2nd phase constructor..

    */

    void ConstructL();

private:    // Data

    // Owns: System Agent

    RSystemAgent iSysAgent;

    // Call event stored here

    TSysAgentEvent iAgentEvent;

    // Observer to be informed when value of system key changes

    MIMPSSystemNotifierObserver& iObserver;

    // the key this observer is attached

    TUid iKey;

    };

#endif      // CIMPSSYSTEMNOTFIERSYSTEMAGENT_H

// End of File