/*

* Copyright (c) 2004 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:  Observer interface to handle message container changes.

*

*/

#ifndef __MCAMESSAGEOBSERVER_H__

#define __MCAMESSAGEOBSERVER_H__

//  INCLUDES

#include <e32def.h>

//	FORWARD CLASS DECLERATIONS

// CLASS DECLARATION

/**

 *  Observer interface to handle message container changes.

 *

 *  @lib CAEngine.dll

 *  @since 3.0

 */

class MCAMessageObserver

    {

    public: // Definitions

        /**

         * Events for observer to handle.

         */

        enum TMessageEventType

            {

            ENewMessage,

            EMessageChanged,

            EMessageDeleted,

            EChatDeleted

            };

    public: // Interface

        /**

         * Handle events.

         * @param aEvent Event to handle.

         * @param aIndex, Index of message which is affected by event.

         */

        virtual void HandleMessageEvent( TMessageEventType aEvent, TInt aIndex = -1 ) = 0;

    protected: // For protection.

        /**

         * Destructor for protection

         */

        virtual ~MCAMessageObserver() {}

    };

#endif      // __MCAMESSAGEOBSERVER_H__

// End of File