/*

* Copyright (c) 2002 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 CPbkThumbnailManager implementation classes.

*

*/

#ifndef __CPbkThumbnailManagerImpl_H__

#define __CPbkThumbnailManagerImpl_H__

//  INCLUDES

#include <e32base.h>

#include <cntdef.h>  // TStorageType

#include <PbkFields.hrh> // EPbkFieldIdThumbnailImage

#include "CPbkThumbnailManager.h"

#include "CPbkImageManager.h"

// CONSTANTS

// Size of thumbnail images stored to contacts

//  FORWARD DECLARATIONS

class MPbkThumbnailGetObserver;

class MPbkThumbnailSetObserver;

class CPbkContactItem;

class CPbkFieldsInfo;

class TPbkImageLoadParameters;

// CLASS DECLARATION

/**

 * Abstract thumbnail reader interface.

 */

NONSHARABLE_CLASS(MPbkThumbnailReader) : 

        public MPbkThumbnailOperation, public MPbkImageOperation

    {

    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 TPbkImageLoadParameters* aParameters = NULL) =0;

        /**

         * Cancels reading operation.

         */

        virtual void CancelRead() =0;

    };

/**

 * Abstract thumbnail image writer interface.

 */

NONSHARABLE_CLASS(MPbkThumbnailWriter) : 

        public MPbkThumbnailOperation, public MPbkImageOperation

    {

    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 MPbkThumbnailReader and 

 * MPbkThumbnailWriter instances.

 */

NONSHARABLE_CLASS(PbkThumbnailOperationFactory)

    {

    public:

        /**

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

         * the thumbnail field in the contact.

         *

         * @param aContact  contact to get thumbnail from.

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

         * @param aFieldId  Phonebook field type id of fetched image.

         * Default field type id is EPbkFieldIdThumbnailImage.

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

         *          thumbnail.

         */

        static MPbkThumbnailReader* CreateReaderLC

            (const CPbkContactItem& aContact,

            MPbkThumbnailGetObserver& aObserver,

            TInt aFieldId = EPbkFieldIdThumbnailImage);

        /**

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

         * of the thumbnail field in the contact.

         *

         * @param aContact  contact to get thumbnail from.

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

         * @param aFieldId  Phonebook field type id of fetched image.

         * Default field type id is EPbkFieldIdThumbnailImage.

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

         *          thumbnail.

         */

        static MPbkThumbnailReader* CreateImageReaderLC

            (const CPbkContactItem& aContact,

            MPbkThumbnailGetImageObserver& aObserver,

            TInt aFieldId = EPbkFieldIdThumbnailImage);

        /**

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

         * field in the contact or in global field typing. 

         *

         * @param aContact      contact to write thumbnail to.

         * @param aFieldsInfo   global Phonebook field types.

         * @param aObserver     observer to notify about progress of the 

         *                      operation.

         * @param aFieldId  Phonebook field type id of fetched image.

         * Default field type id is EPbkFieldIdThumbnailImage.         

         * @return  thumbnail writer object.

         */

        static MPbkThumbnailWriter* CreateWriterLC

            (CPbkContactItem& aContact, 

            const CPbkFieldsInfo& aFieldsInfo,

            MPbkThumbnailSetObserver& aObserver,

            TInt aFieldId = EPbkFieldIdThumbnailImage);

        /**

         * Returns true if aStorageType is supported for thumbnail field.

         */

        static TBool SupportedStorageType(TStorageType aStorageType);

    private:

        /// Namespace class, constructor not implemented.

        PbkThumbnailOperationFactory();

    };

#endif // __CPbkThumbnailManagerImpl_H__

// End of File