imstutils/imconversationview/imcvuiengine/inc/mimcvenginemessageobserver.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 10:12:18 +0200
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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  messge observer interface 
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*
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*/
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#ifndef __MIMCVENGINEMESSAGEOBSERVER_H__
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#define __MIMCVENGINEMESSAGEOBSERVER_H__
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//  INCLUDES
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#include <e32def.h>
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//	FORWARD CLASS DECLERATIONS
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// CLASS DECLARATION
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/**
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 *  Observer interface to handle message container changes.
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 *
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 *  @lib imcvengine.dll
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 *  @since 5.0
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 */
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class MIMCVEngineMessageObserver
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	{
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	public: // Definitions
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		/**
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		 * Events for observer to handle.
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		 */
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		enum TMessageEventType
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			{
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			ENewMessage,
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			EMessageChanged,
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			EMessageDeleted,
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			EChatDeleted
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			};
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	public: // Interface
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		/**
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		 * Handle events.
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		 * @param aEvent Event to handle.
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		 * @param aIndex, Index of message which is affected by event.
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		 */
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		virtual void HandleMessageEvent( TMessageEventType aEvent, TInt aIndex = -1 ) = 0;
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	protected: // For protection.
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		/**
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		 * Destructor for protection
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		 */
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		virtual ~MIMCVEngineMessageObserver(){}
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	};
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#endif      // __MIMCVENGINEMESSAGEOBSERVER_H__
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// End of File