/*

* Copyright (c) 2009 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:

*

*/

#ifndef AKNCBACONTENTOBSERVER_H

#define AKNCBACONTENTOBSERVER_H

#include <e32base.h>

class CEikCba;

/**

 * This class provides means to set content observer

 * for @c CEikCba.

 * @since S60 v5.2

 */

class AknCbaContentObserver

    {

public:

    /**

     * Sets content observer.

     * @param aCba Cba to be observer.

     * @param aCallBack Call back method to invoke when 

     *        value of 'empty OR invisible' boolean expression

     *        changes.

     */

    IMPORT_C static void SetContentObserver( 

        CEikCba* aCba, 

        TCallBack aCallBack );

    };

#endif // AKNCBACONTENTOBSERVER_H