/*

* 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:  Header for  Pull Mode

 *

*/

#ifndef MULPULLMODE_H

#define MULPULLMODE_H

//Includes

#include "mulpushmode.h"

namespace Alf

    {

//Forward Declaration

class IMulModelProvider;

class MulAsyncDataProvider;

/**

 *  Implementation for Pull Mode

 */

class MulPullMode : public MulPushMode

    {

public:

	/**

	 * C++ constructor.

	 * 

	 * @param aDataWindow DataWindow for model

	 * @param aModelProvider Data Provider for model

	 */

    MulPullMode( MulPageDataWindow& aDataWindow,

				 const IMulModelProvider& aModelProvider);

	/**

	 * Destructor.

	 */

	~MulPullMode();

public: //from MulPushMode

	void Update( int aIndex, int aCount, 

                         const MulDataPath& aPath);

	void Refresh(int aCount, const MulDataPath& aPath);				             

	void SetData( int aIndex, auto_ptr<MulVisualItem> aVisualItem, 

                         const MulDataPath& aPath);

	void SetTemplate( mulwidget::TLogicalTemplate aTemplateId );               

	void WindowSiftedDown();

	void WindowSiftedUp();	

	void ModelCountChanged(int aOldCount, int aNewCount);

	void DataWindowUpdated();

	const MulVisualItem& Item( int aAbsoluteIndex );

private:

	/**

	 * Create list of indices and call ProvideData method

	 *

	 * @param aStartIndex, Index form where the data should be fetched

	 * @param aRange, Number of items for which data should be fetched

	 */

	void ProvideData(int aStartIndex, int aRange);

	/**

	 * Update Loop buffer because of data window updation

	 * 

	 */

	void UpdateLoopBuffer();

private: //data

	//IMulModelProvider* mModelProvider; // Not own

	auto_ptr<MulAsyncDataProvider> mModelProvider; // own

    };

    } // namespace Alf

#endif // MULPULLMODE_H

//End of file