/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:    HG VOD*

*/

#ifndef VCXHGVODSERVICEGROUPLISTMODELHANDLER_H_

#define VCXHGVODSERVICEGROUPLISTMODELHANDLER_H_

#include <ganes/HgScrollBufferObserverIface.h>

#include "vcxhgvodmainviewcontainer.h"

#include "vcxhgvodthumbnailobserver.h"

#include "vcxnsserviceproviderobserver.h"

#include "vcxnsservice.h"

class CHgScroller;

class CVcxHgVodMainViewContainer;

class CVcxHgVodMainView;

class CVcxHgVodThumbnailManager;

class MVcxNsServiceProviderIf;

class CVcxNsUiEngine;

class CVcxNsService;

class CVcxHgVodServiceGroupListImpl;

// CLASS DECLARATION

/**

 *  

 *  

 *

 *  @code

 *   

 *  @endcode

 *

 *  @lib vcxhgvodui.lib

 *  @since S60 v5.0

 */

NONSHARABLE_CLASS( CVcxHgVodServiceGroupListModelHandler ) : public CBase,

                                              public MVcxNsServiceProviderObserver,

                                              public MVcxHgVodThumbnailObserver,

                                              public MHgScrollBufferObserver                                              

    {

public:

    /**

     * Two-phased constructor.

     */

    static CVcxHgVodServiceGroupListModelHandler* NewL( 

                CVcxNsUiEngine& aDataProviderIf, 

                CVcxHgVodMainView& aView, 

                CHgScroller& aScroller,

                CVcxHgVodServiceGroupListImpl& aServiceGroupListImpl );

    /**

     * Two-phased constructor.

     */

    static CVcxHgVodServiceGroupListModelHandler* NewLC( 

                CVcxNsUiEngine& aDataProviderIf, 

                CVcxHgVodMainView& aView, 

                CHgScroller& aScroller,

                CVcxHgVodServiceGroupListImpl& aServiceGroupListImpl );

    /**

    * Destructor.

    */

    virtual ~CVcxHgVodServiceGroupListModelHandler();

    /**

    * Activate model

    * 

    */

    void DoActivateModelL( );

    /**

    * Deactivate model

    * 

    */

    void DoDeActivateModel( );

public:    

    /**

     * Get service provider

     * 

     */

    MVcxNsServiceProviderIf* ServiceProvider(); 

    /**

     * Get service provider

     * @return highlighted item index

    */

    TInt GetSelected();

    /**

     * Check if there are any services in the list

     * 

     */

    TBool IsEmptyModel();

    /**

     * From MVcxNsServiceProviderObserver

     * 

     */

    void RefreshView();

    /**

     * @return Count of list items.

     */

    TInt ItemCount();

    /**

     * From MVcxHgVodThumbnailObserver

     * Notifies about completed thumbnail loading.

     *

     * @param aIcon Pointer to the created icon, ownership is transferred.

     * @param aClientId ServiceId of the thumbnail.

     */  

    void MvtoThumbnailReady( CGulIcon* aIcon, TInt64 aClientId );

private:    

    /**

     * Default constructor

     * @param aDataProviderIf Data provider interface.

     * @param aView Reference to view

     * @param aAlfEnv Reference to alf environment

     * @param aListWidget Reference to list widget

     * @param aServiceGroupListImpl List implementation

     */

    CVcxHgVodServiceGroupListModelHandler( 

            CVcxNsUiEngine& aDataProviderIf, 

            CVcxHgVodMainView& aView, 

            CHgScroller& aScroller,

            CVcxHgVodServiceGroupListImpl& aServiceGroupListImpl );

    /**

     * Constructor

     *

     */

    void ConstructL( );

    /**

     * From MVcxNsServiceProviderObserver

     * Notify service has been added.

     *

     * @param aIndex Added item's index

     */

    void ServiceAdded( TInt aIndex );

    /**

     * From MVcxNsServiceProviderObserver

     * Handles updated service data 

     * 

     */

    void ServiceUpdated( TInt aIndex );

    /**

     * Notify services data has been removed

     *

     * @param aIndex Removed item's index

     * @param aUpdatedServiceList Updated service list array

     */

    void ServiceRemoved( 

            TInt /*aIndex*/, 

            RPointerArray<CVcxNsService>& /*aUpdatedServiceList*/ );

    /**

     * From MVcxNsCategoryProviderObserver 

     * Application state needs to be updated.

     */

    void HandleAppStateChangedL();

    /**

     * From MVcxNsServiceProviderObserver

     */

    void OpenBrowserLinkL( const TDesC& aUri );

    /**

     * From MVcxNsServiceProviderObserver

     */

    void OpenStreamingLinkL( const TDesC& aUri );

    /**

     * Create the service item's second visible text

     * @param aGroupService Group service

     */

    HBufC* GenerateInfoTextLC( CVcxNsService& aGroupService );

    /**

     * Refreshes view.

     */

    void RefreshViewL();

    /**

     * Updates data of item in list.

	 * @param aIndex Item's index

	 */

    void UpdateListItemL( TInt aIndex );

    /**

     * Handles completed thumbnail loading. Makes sure that aIcon is

     * pushed to CleanupStack before any leaving code is executed.

     */

    void DoThumbnailReadyL( CGulIcon* aIcon, TInt64 aClientId );

    /**

     * From MHgScrollBufferObserver

     * 

     * Buffer position changed. The items between the aBufferStart 

     * and aBufferEnd should be loaded as soon as possible.

     * 

     * @param aBufferStart The index of the first item in buffer.

     * @param aBufferEnd The index of the last item in buffer.

     * @param aDirection The direction of request.

     */

    void Request( TInt aBufferStart, TInt aBufferEnd, THgScrollDirection aDirection );

    /**

     * From MHgScrollBufferObserver

     * 

     * Buffer position changed. The items between the aBufferStart 

     * and aBufferEnd should be released.

     * 

     * @param aBufferStart The index of the first item in buffer.

     * @param aBufferEnd The index of the last item in buffer.

     */

    void Release( TInt aBufferStart, TInt aBufferEnd );

private: // data

    /**

     * Ref to Ui Engine interface.

     * 

     */

    CVcxNsUiEngine& iDataProviderIf;

   /**

    * Pointer to service provider interface in UI engine

    * Not own.

    */

    MVcxNsServiceProviderIf* iServiceProvider;

   /**

    * Pointer to array that holds grouped services 

    * Not own.

    */

    RPointerArray<CVcxNsService>* iGroupServices;

    /**

     * Reference to UI component responsible for drawing the list.

     */

    CHgScroller& iScroller;

    /**

     * Reference to vod main view

     */

    CVcxHgVodMainView& iView;

    /**

     * Ref to service view implementation class

     * 

     */

    CVcxHgVodServiceGroupListImpl& iListImpl;

    /**

     * Used to load thumbnails asynchronously.

     */

    CVcxHgVodThumbnailManager* iTnManager;

    /**

     * Saves the highlight index.

     */

    TInt iHighlight;

    };

#endif /*VCXHGVODSERVICEGROUPLISTMODELHANDLER_H_*/