/*

* 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 VCXHGVODCONTENTLISTMODELHANDLER_H

#define VCXHGVODCONTENTLISTMODELHANDLER_H

#include <ganes/HgScrollBufferObserverIface.h>

#include "vcxhgvodthumbnailobserver.h"

#include "vcxhgvodmainviewcontainer.h"

#include "vcxnscontentproviderif.h"

#include "vcxnscontentproviderobserver.h"

class CHgScroller;

class CVcxHgVodMainView;

class CVcxNsUiEngine;

class CVcxNsContent;

class CVcxHgVodContentListImpl;

class CVcxHgVodThumbnailManager;

class TVcxHgVodVideoDetailsDialog;

// CLASS DECLARATION

/**

 *

 *  @code

 *   

 *  @endcode

 *

 *  @lib vcxhgvodui.lib

 *  @since S60 v5.0

 */

class CVcxHgVodContentListModelHandler : public CBase,

                                         public MVcxNsContentProviderObserver,

                                         public MVcxHgVodThumbnailObserver,

                                         public MHgScrollBufferObserver

    {

public:

    /**

     * Two-phased constructor.

     */

    static CVcxHgVodContentListModelHandler* NewL( 

            CVcxNsUiEngine& aDataProviderIf,

            CVcxHgVodMainView& aView, 

            CHgScroller& aScroller,

            CVcxHgVodContentListImpl& aContentListImpl );

    /**

     * Two-phased constructor.

     */

    static CVcxHgVodContentListModelHandler* NewLC( 

            CVcxNsUiEngine& aDataProviderIf,

            CVcxHgVodMainView& aView, 

            CHgScroller& aScroller,

            CVcxHgVodContentListImpl& aContentListImpl );

    /**

    * Destructor.

    */

    virtual ~CVcxHgVodContentListModelHandler();

    /**

    * Activate model

    * 

    */

    void DoActivateModelL( );

    /**

    * Deactivate model

    * 

    */

    void DoDeActivateModel( );

    /**

    * Get services and set to widget model.

    * 

    */

    void SetListContentL();

    /**

    * Get category provider interface pointer

    * 

    */

    MVcxNsContentProviderIf* ContentProvider();

    /**

     * Get selected video's details

     */

    void ShowVideoDetailsL( TInt aSelected );

    /**

     * Check if model is empty.

     */

    TBool IsEmptyModel();

public:    

    /**

     * From MVcxNsContentProviderObserver

     * Notify content's data has been updated.

     */

    void ContentUpdated( TInt aIndex );

    /**

     * From MVcxNsContentProviderObserver 

     * Application state or full view data needs to be updated.

     */

    void RefreshView();

    /**

     * From MVcxNsCategoryProviderObserver 

     * Application state needs to be updated.

     */

    void HandleAppStateChangedL();

    /**

     * MVcxNsContentProviderObserver

     * Epg update is ongoing, show the notification.

     * When downloading and parsing the xml, both parameters are 0.

     * 

     * @param aDownloaded count of downloaded thumbnails.

     * @param aTotal Total count of thumbnails to be downloaded.

     */

    void ShowUpdatingNoteL( TBool aShow, TInt aDownloadedTbns, TInt aTotalTbns );

    /**

     * From MVcxNsContentProviderObserver

     * Handle error 

     * 

     * @param aError Error to handle in UI

     */

    void HandleUpdateErrorL( TInt aError );

    /**

     * From MVcxNsContentProviderObserver

     * Handle download error 

     * 

     * @param aError Error to handle in UI

     * @param aContent Details of the video which content has failed.

     */

    void HandleDownloadErrorL( TIptvDlError aError, CVcxNsContent& aContent );

    /**

     * From MVcxHgVodThumbnailObserver

     * Notifies about completed thumbnail loading.

     *

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

     * @param aClientId ContentId of the thumbnail.

     */  

    void MvtoThumbnailReady( CGulIcon* aIcon, TInt64 aClientId );

private:    

    /**

     * Default constructor

     *

     */

    CVcxHgVodContentListModelHandler( 

                CVcxNsUiEngine& aDataProviderIf,

                CVcxHgVodMainView& aView, 

                CHgScroller& aScroller,

                CVcxHgVodContentListImpl& aContentListImpl );

    /**

     * Constructor

     */

    void ConstructL( );

    /**

     * Generate second line text according to content current status.

     * @param aContent Content details

     * @return Content info string

     */

    HBufC* GenerateContextInfoTextLC( CVcxNsContent& aContent );

    /**

     * Update msk commands.

     */

    void HandleCommandUpdatesL();

    /**

     * Update data in the model

     *  

     * @param aStartIndex Index at which the item request has been initiated

     * @param aRange Number of items to update

     */

    void ProvideDataL( int aStartIndex, int aRange );

    /**

     * Update view details:

     * Title pane, empty list text.

     */

    void UpdateViewDetailsL();

    /**

     * 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 the 

     * 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

    /**

     * Video details dialog.

     * Own.

     */

    TVcxHgVodVideoDetailsDialog* iVideoDetails;

    /**

     * Ref to Ui Engine interface.

     * 

     */

    CVcxNsUiEngine& iDataProviderIf;

    /**

     * Reference to vod main view

     *

     */

    CVcxHgVodMainView& iView;

    /**

     * Reference to UI component responsible for displaying the list.

     */

    CHgScroller& iScroller;

    /**

     * Pointer to content provider if in UI engine

     * 

     */

    MVcxNsContentProviderIf* iContentProvider;

    /**

     * Pointer to array that holds contents in UI engine

     * Not own.

     */

    RPointerArray<CVcxNsContent>* iContents;

    /**

     * Ref to list implementation

     * 

     */

    CVcxHgVodContentListImpl& iListImpl;

    /**

     * Used to load thumbnails asynchronously.

     */

    CVcxHgVodThumbnailManager* iTnManager;

    };

#endif // VCXHGVODCONTENTLISTMODELHANDLER_H