/*

* 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:  Publish & Subscribe system keys change observer

*

*/

#ifndef CIMPSSYSTEMNOTFIER_H

#define CIMPSSYSTEMNOTFIERSYSTEMAGENT_H

//  INCLUDES

#include "MIMPSSystemNotifier.h"

#include "MIMPSPropertyNotificationObserver.h"

// FORWARD DECLARATIONS

class MIMPSSystemNotifierObserver;

class CIMPSPropertyObserver;

// CLASS DECLARATION

/**

*  Implementation of the Publish & Subscribe system keys change observer

*

*  @since 2.6

*/

NONSHARABLE_CLASS( CIMPSSystemNotifierPubSub ) : public MIMPSSystemNotifier,

        public MIMPSPropertyNotificationObserver

    {

public:  // Constructors and destructor

    /**

    * Two-phased constructor.

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

    */

    static CIMPSSystemNotifierPubSub* NewL( MIMPSSystemNotifierObserver& aObserver,

    const TUid aKey );

    /**

    * Destructor.

    */

    virtual ~CIMPSSystemNotifierPubSub();

protected:     // from MIMPSSystemNotifier

    /**

    * @see MIMPSSystemNotifier

    */

    TInt Subscribe();

    /**

    * @see MIMPSSystemNotifier

    */

    void UnSubscribe();

    /**

    * @see MIMPSSystemNotifier

    */

    TInt GetIntKey( TInt& aValue );

protected:  // from MIMPSPropertyNotificationObserver.h

    void HandlePropertyNotificationEventL( TUid aCategory, TUint aKey );

private:

    /**

    * C++ default constructor.

    */

    CIMPSSystemNotifierPubSub( MIMPSSystemNotifierObserver& aObserver,

                               const TUid aKey );

    /**

    * Symbian 2nd phase constructor..

    */

    void ConstructL();

private:    // Data

    // Observers property sets, owned

    CIMPSPropertyObserver* iPropertyObserver;

    // 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