/*

* Copyright (c) 2008-2009 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:    Implementation class for Medialist Access for Data

*

*/

#ifndef _GLXMEDIALISTMULMODELPROVIDER_H_

#define _GLXMEDIALISTMULMODELPROVIDER_H_

#include <e32base.h>                        // Container Base Class

#include <mul/imulwidget.h>

// Forward declarations

class CAlfEnv;                              // This is the UI Accelerator Toolkit environment object

class MGlxMediaList;                        // Interface for reading lists of media items

class TGlxMulBindingSetFactory;             // Create binding set

class CGlxMediaListMulModelProviderImpl;    // Actual implemntation for providign the data to the clients is done here

/**

* CGlxMediaListMulModelProvider is the provider class which provides data for 

* list view, grid view. 

* This doesnt have any implementaiton.

* This actual implementaion is provided in CGlxMediaListMulModelProviderImpl

*/

NONSHARABLE_CLASS( CGlxMediaListMulModelProvider ) : public CBase

    {

public:

	/**

	* The client uses this API to create the provider

	* @param aEnv The Alf Environment

	* @param aWidget The widget being used by client for which the model has to be set

	* @param aMediaList The instance of medialist which provides data for the model

	* @param aFactory The instance of the bindingset factory 

	* @param aDefaultTemplate The template that is being used for the widget.

	*/

    IMPORT_C static CGlxMediaListMulModelProvider* NewL( CAlfEnv& aEnv, 

											Alf::IMulWidget& aWidget, 

											MGlxMediaList& aMediaList, 

											const TGlxMulBindingSetFactory& aFactory, 

											Alf::mulwidget::TLogicalTemplate aDefaultTemplate,

											TInt aDataWindowSize );

    /**

	* Destructor

	*/            

    IMPORT_C ~CGlxMediaListMulModelProvider();

      /**

      * Requests the data model to update

      * 

      * @param aIndex Position from where items have to be updated.

      * @param aCount Number of items to be updated.

      */ 

    IMPORT_C void UpdateItems( TInt aIndex, TInt aCount );

private:

    CGlxMediaListMulModelProvider();

    /** ConstructL

	* @param aEnv Env variable of ALF

 	* @param aWidget Alf Widget type

 	* @param aMediaList medialist from which attributes to be fetched

 	* @param aDefaultTemplate Template that will be set to model

 	*/

    void ConstructL(CAlfEnv& aEnv, 

					Alf::IMulWidget& aWidget, 

					MGlxMediaList& aMediaList,

					const TGlxMulBindingSetFactory& aFactory, 

					Alf::mulwidget::TLogicalTemplate aDefaultTemplate,

					TInt aDataWindowSize );

	// The implementaion APIs of CGlxMediaListMulModelProviderImpl 

	// have to be called: owns

    CGlxMediaListMulModelProviderImpl* iImpl;

    };

#endif // _GLXMEDIALISTMULMODELPROVIDER_H_