/*

* Copyright (c) 2008-2008 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:  Encapsulates singleton client and provided observer

*

*/

#ifndef C_CCHUICLIENTOBSERVER_H

#define C_CCHUICLIENTOBSERVER_H

#include <e32base.h>

#include <e32const.h>

class MCchUiObserver;

/**

 * This class stores client provider reference and api instance used to create

 * it. Those can be mapped when api instance is deleted to remove observer. 

 * This way singleton instance will not call observers that are already deleted.

 * This class implements the use of Service provider settings.

 *

 * @code

 * @endcode

 *

 * @lib cchui.lib

 * @since S60 5.0

 */

NONSHARABLE_CLASS( CCchUiClientObserver ): public CBase

    {

public:

    /**

     * Two-phased constructor.

     */

    static CCchUiClientObserver* NewL( MCchUiObserver& aObserver);

    /**

     * Two-phased constructor.

     */

    static CCchUiClientObserver* NewLC( MCchUiObserver& aObserver );

    /**

     * Destructor.

     */

    virtual ~CCchUiClientObserver();

    /**

     * Return observer.

     *

     * @since S60 5.0

     * @return observer reference

     */

    MCchUiObserver& Observer();

private:

    CCchUiClientObserver( MCchUiObserver& aObserver );

private: // data

    /**

     * Observer reference.

     */

    MCchUiObserver& iObserver;

    };

#endif // C_CCHUICLIENTOBSERVER_H