/*

* Copyright (c) 2005-2007 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: 

*     Class CPbk2ImageManager implementation classes.

*

*/

#ifndef CPBK2IMAGEREADERBASE_H

#define CPBK2IMAGEREADERBASE_H

//  INCLUDES

#include <e32base.h>

#include "CPbk2ImageManagerImpl.h"

#include "MPbk2ImageReaderObserver.h"

//  FORWARD DECLARATIONS

class MPbk2ImageGetObserver;

class CPbk2ImageReader;

class TPbk2ImageManagerParams;

// CLASS DECLARATION

/**

 * Implementation base class for thumbnail readers.

 */

NONSHARABLE_CLASS(CPbk2ImageReaderBase) : 

        public CBase, 

        public MPbk2ImageReader,

        private MPbk2ImageReaderObserver

    {

    protected: // interface

        /**

         * Constructor.

		 * @param aObserver thumbnail get observer

         */

        CPbk2ImageReaderBase(MPbk2ImageGetObserver& aObserver);

        /**

         * Second phase constructor.

         */

        void ConstructL();

        /**

         * Destructor. Cancels any previously executing read operation and

         * destroys this object.

         */

        ~CPbk2ImageReaderBase();

        /**

         * Returns the image reader.

         * 

         * @return Image reader

         */

        CPbk2ImageReader& ImageReader()

			{

			return *iImageReader;

			}

    public:  // from MPbkThumbnailReader

        void CancelRead();

    private:  // from MPbkImageReaderObserver

        void ImageReadComplete(CPbk2ImageReader& aReader, CFbsBitmap* aBitmap);

        void ImageReadFailed(CPbk2ImageReader& aReader, TInt aError);

        void ImageOpenComplete(CPbk2ImageReader& aReader);

    private: // data members

        /// Ref: observer

        MPbk2ImageGetObserver& iObserver;

        /// Own: image reader

        CPbk2ImageReader* iImageReader;

    };

#endif // CPBK2IMAGEREADERBASE_H

// End of File