/*

* Copyright (c) 2007 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:  MFsNodeVisualizer is an interface for the node visualizer.

*

*/

#ifndef M_FSTREENODEVISUALIZER_H

#define M_FSTREENODEVISUALIZER_H

#include "fstreeitemvisualizer.h"

/**

 * MFsNodeVisualizer is an interface for the node visualizer.

 *

 * This is an interface for node visualization in the tree. This interface is 

 * based on item visualization interface. This interface adds functions to 

 * change node's visualization state between collapsed and unrolled.

 * @code

 *

 * @endcode

 *

 * @lib 

 */

NONSHARABLE_CLASS ( MFsTreeNodeVisualizer ): public MFsTreeItemVisualizer

    {

public:

    /**

     * C++ destructor

     */

    virtual ~MFsTreeNodeVisualizer() {};    

public:

    /**

     * Sets visualized node's state to rolled/unrolled.

     * 

     * @param aFlag ETrue to visualize node as rolled (collapsed).

     */

    virtual void SetExpanded( TBool aFlag, const MFsTreeItemData* aData = 0 ) = 0;

    /**

     * Returns rolled/unrolled state of the node's visualization.

     * 

     * @return ETrue if node is visualized as rolled (collapsed).

     */

    virtual TBool IsExpanded() const = 0;

    };

#endif // M_FSTREENODEVISUALIZER_H