mulwidgets/muldatamodel/inc/mulpullmode.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:56:02 +0200
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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Header for  Pull Mode
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 *
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*/
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#ifndef MULPULLMODE_H
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#define MULPULLMODE_H
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//Includes
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#include "mulpushmode.h"
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namespace Alf
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    {
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//Forward Declaration
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class IMulModelProvider;
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class MulAsyncDataProvider;
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/**
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 *  Implementation for Pull Mode
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 */
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class MulPullMode : public MulPushMode
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    {
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public:
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	/**
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	 * C++ constructor.
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	 * 
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	 * @param aDataWindow DataWindow for model
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	 * @param aModelProvider Data Provider for model
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	 */
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    MulPullMode( MulPageDataWindow& aDataWindow,
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				 const IMulModelProvider& aModelProvider);
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	/**
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	 * Destructor.
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	 */
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	~MulPullMode();
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public: //from MulPushMode
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	void Update( int aIndex, int aCount, 
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                         const MulDataPath& aPath);
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	void Refresh(int aCount, const MulDataPath& aPath);				             
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	void SetData( int aIndex, auto_ptr<MulVisualItem> aVisualItem, 
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                         const MulDataPath& aPath);
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	void SetTemplate( mulwidget::TLogicalTemplate aTemplateId );               
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	void WindowSiftedDown();
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	void WindowSiftedUp();	
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	void ModelCountChanged(int aOldCount, int aNewCount);
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	void DataWindowUpdated();
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	const MulVisualItem& Item( int aAbsoluteIndex );
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private:
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	/**
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	 * Create list of indices and call ProvideData method
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	 *
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	 * @param aStartIndex, Index form where the data should be fetched
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	 * @param aRange, Number of items for which data should be fetched
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	 */
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	void ProvideData(int aStartIndex, int aRange);
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	/**
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	 * Update Loop buffer because of data window updation
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	 * 
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	 */
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	void UpdateLoopBuffer();
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private: //data
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	//IMulModelProvider* mModelProvider; // Not own
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	auto_ptr<MulAsyncDataProvider> mModelProvider; // own
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    };
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    } // namespace Alf
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#endif // MULPULLMODE_H
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//End of file
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