/*

* 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:  Listens for changes in a Central Repository key.

*

*/

#ifndef CENREPOBSERVER_H

#define CENREPOBSERVER_H

// FORWARD DECLARATIONS

class CRepository;

class MCenRepObserver;

// Stop requesting new notifications after this many consecutive errors

const TInt KCenRepErrorRetryCount = 80;

namespace AiXmlUiController

{

/**

* MCenRepObserver

*

* Client application must implement the CenRepObserver interface in

* order to receive a notification when Central Repository key 

* KCRUidCmManager/ KCurrentCellularDataUsage changes.

*

*/

class MCenRepObserver

    {

public:

    /**

    * This method is called every time when Central Repository key 

    * KCRUidCmManager/ KCurrentCellularDataUsage changes.

    *

    * @param aValue The new value for KCurrentCellularDataUsage.

    * 

    */

    virtual void CurrentCellularDataUsageChangedL( const TInt aValue ) = 0;

    };

/**

* CCenRepObserver

*

*/

NONSHARABLE_CLASS( CCenRepObserver ) : public CActive

    {

public: // Constructors and destructor

    static CCenRepObserver* NewL( MCenRepObserver* aObserver );

    static CCenRepObserver* NewLC( MCenRepObserver* aObserver );

    virtual ~CCenRepObserver();

private:

    CCenRepObserver( MCenRepObserver* aObserver );

    void ConstructL();

    /**

    * Request notification for network setting change

    */

    void RequestNotifications();

private: // Methods from base class

    void DoCancel();

    void RunL();

private:

    /**

    * Cenrep Observer. Not own

    */

    MCenRepObserver*   iObserver;

    /**

    * Cenrep repository. Own

    */

    CRepository*       iRepository;

    /**

    * Cenrep read error count.

    */

    TInt               iErrorCounter;

    };

}// namespace AiXmlUiController

#endif // AOCENREPOBSERVER_H

// End-of-file