/*

* Copyright (c) 2009 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 class for handling thumbnail loading*

*/

#ifndef VCXHGVODTHUMBNAILMANAGER_H

#define VCXHGVODTHUMBNAILMANAGER_H

#include <coemain.h>

#include "vcxnsimageconverterobserver.h"

class CVcxNsImageConverter;

class MVcxHgVodThumbnailObserver;

class CVcxHgVodThumbnailRequest;

// CLASS DECLARATION

/**

 *  Utility class for handling thumbnail loading

 *

 *  @lib vcxhgvodui.lib

 *  @since S60 v5.0

 */

NONSHARABLE_CLASS( CVcxHgVodThumbnailManager ): public CBase,

                                                public MVcxNsImageConverterObserver

    {

public:

    static CVcxHgVodThumbnailManager* NewL( RFs& aFsSession );

    static CVcxHgVodThumbnailManager* NewLC( RFs& aFsSession );

    virtual ~CVcxHgVodThumbnailManager();

    /**

     * Resets the thumbnail fetching buffer from all clients. Ok, as we should have

     * only one client that actually matters (ie. displays thumbnails on screen).

     */

    void Reset();

    /**

     * Adds a new thumbnail fetching request to buffer.

     * 

     * @param aObserver Observer which is notified when thumbnail is ready.

     * @param aThumbnailPath Path to the thumbnail file.

     * @param aRequestedSize Size of the needed thumbnail.

     * @param aClientId Client specific unique id for the thumbnail.

     */

    void AddThumbnailRequestL( MVcxHgVodThumbnailObserver& aObserver,

            const TDesC& aThumbnailPath, TSize aRequestedSize, TInt64 aClientId );

    /**

     * From MVcxNsImageConverterObserver

     * Notify about completed image conversion.

     *

     * @param aError Error code.

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

     *               NULL if conversion failed with error.

     */  

    void ImageConversionCompletedL( TInt aError, CGulIcon* aIcon );        

private:    

    CVcxHgVodThumbnailManager();

    void ConstructL( RFs& aFsSession );

private: // data

    /**

     * Converts the images to requested size.

     * Own.

     */

    CVcxNsImageConverter* iImageConverter;

    /**

     * Buffer for thumbnail requests. Owns items in array.

     */

    RPointerArray<CVcxHgVodThumbnailRequest> iRequestBuffer;

    };

#endif // VCXHGVODTHUMBNAILMANAGER_H