/*

* Copyright (c) 2007-2009 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:  MR observer for the custom list pane

*

*/

#ifndef MMRFIELDCONTAINEROBSERVER_H

#define MMRFIELDCONTAINEROBSERVER_H

//<cmail>

#include "esmrdef.h"

//</cmail>

class CESMRField;

/**

 *  Observer interface for scrolling fields up and down.

 *

 *  @see cmrlistpane.h

 *  @lib esmrgui.lib

 */

 class MMRFieldContainerObserver

    {

public:

    /**

     * Scrolls list items up

     * @param aPx Amount of scroll in pixels

     */

    virtual void ScrollFieldsUp( TInt aPx ) = 0;

    /**

     * Scrolls list items down

     * @param aPx Amount of scroll in pixels

     */

    virtual void ScrollFieldsDown( TInt aPx ) = 0;

    /**

     * Tells to the list pane that scroll bar 

     * and physics require updating.

     *

     * @param aPx Amount of scroll in pixels

     */

    virtual void UpdateScrollBarAndPhysics() = 0;

    };

#endif // MMRFIELDCONTAINERPOSITIONOBSERVER_H