/*

* Copyright (c) 2006 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:  Base class for concrete thumbnailloaders.

*

*/

#ifndef CPHCNTTHUMBNAILLOADERBASE_H

#define CPHCNTTHUMBNAILLOADERBASE_H

#include <e32base.h>

#include "mphcntthumbnailloader.h"

/**

 *  Base class for thumbnail loaders.

 *

 *  Holds the loading observer and offers interface 

 *  for notifying the observer.

 *

 *  @lib PhoneCntFinder

 *  @since S60 v3.1

 */

NONSHARABLE_CLASS( CPhCntThumbnailLoaderBase ) : 

    public CBase,

    public MPhCntThumbnailLoader

    {

public:

// from base class MPhCntThumbnailLoader

     /**

      * From MPhCntThumbnailLoader.

      *

      * @since S60 v3.1

      * @see MPhCntThumbnailLoader

      */

    void LoadL( 

        const CPhCntContactId& aContactId,

        MPhCntLoaderObserver& aLoadingObserver );

protected:

    virtual ~CPhCntThumbnailLoaderBase();

    CPhCntThumbnailLoaderBase();

    /**

     * Notifies the observer.

     */

    void NotifyObserver( CFbsBitmap* aBitmap, TInt aError );

private:

    /**

     * Template method, for doing the actual loading in base class.

     */

    virtual void DoLoadL( const CPhCntContactId& aContactId ) = 0;

private: // Data

    /** 

     * Observer of loading thumbnail.

     * Not own.

     */

    MPhCntLoaderObserver* iLoadingObserver;

    };

#endif // CPHCNTTHUMBNAILLOADERBASE_H