/*

* 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:  Transaction element base class

*

*/

#ifndef M_TRANSACTIONELEMENT_H

#define M_TRANSACTIONELEMENT_H

#include <e32def.h>

#include "aipolicyelement.h"

#include "transaction.h"

namespace AiXmlUiController

{

/**

 * MTransactionElement declatres the public interface for transaction elements.

 * MTransactionElement corresponds one publish operation within a

 * transaction scope.

 *

 * @lib AiXmlUiMain

 */

class MTransactionElement

    {

public: // New functions

    /**

     * Commits the publish operation and actually updates the UI control/element.

     *

     * @see UpdateDataL()

     * @see ApplyPublishingPolicy()

     */

    /**

     * Resets the transaction element and clears the references to content

     * and UI control/element.

     *

     */

    virtual void Reset() = 0;

    /**

     * Return the target UI element for this transaction element

     */

    virtual CXnNodeAppIf& Target() const = 0 ;

protected:  // New functions

    /**

     * Updates UI control / element data.

     *

     * @since S60 3.2

     */

    virtual void UpdateDataL() = 0;

    /**

     * Applies current publishing policy to UI control / element.

     *

     * @param [out] aLayoutChanged true if UI layout changes

     */

                                        RPropertyHashMap& aPropertyHashMap ) = 0;

protected:  // Constructors and destructor

    ~MTransactionElement() {};

    };

}   // namespace AiXmlUiController

#endif      // M_TRANSACTIONELEMENT_H  

//  End of File