/*

* Copyright (c) 2007-2008 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:  Implementation of model interface

 *

*/

#ifndef	I_MULMODEOBSERVER_H

#define I_MULMODEOBSERVER_H

#include <alf/ialfmodelchangeobserver.h> 

namespace Alf

	{

//Forward Declaration

class IMulVariantType;

/**

 * Observer interface to provide notification about model state change.

 * Widget needs to implement this interface to get highlight or marking change event.

 */

class IMulModelObserver //: public IAlfModelChangeObserver

	{

public: //enum

	/**

	 *Changed state of model 

	 */

	enum TMulChangedState 

	    { 

	    EHighlightChanged = 1, 

	    EMarkingChanged,

	    EDataWindowUpdated, 

	    EItemsInserted,

	    EItemsRemoved,

	    EItemUpdated,

	    ETemplateChanged,

	    EModelRefreshed

	    };

public: //method

	/**

     * Notify observer about IMulModel state change.

	 * Observer will be notified when highlight or marking is changed from model.

	 *

	 * @param aState Highlight or making changed

	 * @param aData Index of new highlight or Index of marked or unmarked item.

	 *				( Item is marked or not should be checked using IMulModelAccessor interface)

	 */

	virtual void ModelStateChanged( TMulChangedState aState, IMulVariantType& aData ) = 0;

	};

	} // Namespace Alf

#endif //I_MULMODEOBSERVER_H	

//End of file