/*

* 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 CPBK2IMAGEMANAGERIMPL_H

#define CPBK2IMAGEMANAGERIMPL_H

//  INCLUDES

#include "CPbk2ImageManager.h"

#include "VPbkFieldType.hrh" // TVPbkFieldStorageType

// CONSTANTS

// Size of thumbnail images stored to contacts

#define KPbk2PersonalImageSize TSize(150,150)

//  FORWARD DECLARATIONS

class MPbk2ImageGetObserver;

class MPbk2ImageSetObserver;

class CVPbkContactManager;

class MVPbkBaseContactField;

// CLASS DECLARATION

/**

 * Abstract thumbnail reader interface.

 */

class MPbk2ImageReader : 

        public MPbk2ImageOperation

    {

    public:  // Interface

        /**

         * Starts reading a thumbnail from the contact specified at creation

         * time.

         * @param aParameters Optional parameters for the thumbnail.

         * 

         * @see TPbkImageLoadParameters

         */

        virtual void StartReadL

            (const TPbk2ImageManagerParams* aParameters = NULL) =0;

        /**

         * Cancels reading operation.

         */

        virtual void CancelRead() =0;

    };

/**

 * Abstract thumbnail image writer interface.

 */

class MPbk2ImageWriter : 

        public MPbk2ImageOperation

    {

    public:  // Interface

        /**

         * Starts writing a bitmap to the contact.

         *

         * @param aBitmap   bitmap to save to contact.

         */

        virtual void StartWriteL(const CFbsBitmap& aBitmap) =0;

        /**

         * Starts writing an image buffer to the contact.

         *

         * @param aBuffer   image buffer to save to contact.

         */

        virtual void StartWriteL(const TDesC8& aBuffer) =0;

        /**

         * Starts writing a file image to the contact.

         *

         * @param aFileName   file image to save to contact.

         */

        virtual void StartWriteL(const TDesC& aFileName) = 0;

        /**

         * Cancels writing operation.

         */

        virtual void CancelWrite() =0;

    };

/**

 * Factory class for creating concrete MPbk2ImageReader and 

 * MPbk2ImageWriter instances.

 */

class Pbk2ImageOperationFactory

    {

    public:

        /**

         * Creates a concrete image reader object based on the type of 

         * the thumbnail field in the contact.

         *

         * @param aContactManager Contact manager

         * @param aContact  contact to get thumbnail from.

         * @param aObserver observer to notify about progress of the operation.

         * @param aFieldType  Phonebook field type of fetched image.

         * Default field type is EPbkFieldIdThumbnailImage.

         * @return  thumbnail reader object or NULL if aContact contains no

         *          thumbnail.

         */

        static MPbk2ImageReader* CreateReaderLC

            (CVPbkContactManager& aContactManager,

            const MVPbkBaseContact& aContact,

            MPbk2ImageGetObserver& aObserver,

            const MVPbkFieldType& aFieldType);

        /**

         * Creates a concrete writer object based on the type of the thumbnail

         * field in the contact or in global field typing. 

         *

         * @param aContactManager Contact manager

         * @param aContact      contact to write thumbnail to.

         * @param aObserver     observer to notify about progress of the 

         *                      operation.

         * @param aFieldType  Phonebook field type of fetched image.

         * Default field type is EPbkFieldIdThumbnailImage.         

         * @return  thumbnail writer object.

         */

        static MPbk2ImageWriter* CreateWriterLC

            (CVPbkContactManager& aContactManager,

            MVPbkStoreContact& aContact, 

            MPbk2ImageSetObserver& aObserver,

            const MVPbkFieldType& aFieldType);

        /**

         * Returns true if aStorageType is supported for thumbnail field.

         *

         * @param aField    Contact field 

         * @return ETrue if field is supported, other EFalse

         */

        static TBool SupportedStorageType(const MVPbkBaseContactField* aField);

    private:

        /// Namespace class, constructor not implemented.

        Pbk2ImageOperationFactory();

    };

#endif // CPBK2IMAGEMANAGERIMPL_H

// End of File