/*+
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* Copyright (c) 2004 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:  Observer interface to handle chat container changes.+
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*+
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*/+
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+
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+
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#ifndef __MCACHATOBSERVER_H__+
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#define __MCACHATOBSERVER_H__+
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+
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//  INCLUDES+
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#include <e32def.h>+
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+
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//	FORWARD CLASS DECLERATIONS+
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class MCAMessage;+
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+
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// CLASS DECLARATION+
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+
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/**+
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 *  Observer interface to handle messages container changes.+
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 *+
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 *  @lib CAEngine.dll+
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 *  @since 3.0+
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 */+
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class MCAChatObserver+
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    {+
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+
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    public: // Definitions+
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+
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        /**+
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         * Events for observer to handle.+
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         */+
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        enum TChatEventType+
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            {+
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            EGroupListChanged,+
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            EChatListChanged,+
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            ESendListChanged,+
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            EUnreadCountChanged, // Happens with new message and when messages are read.+
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            EMemoryLow,+
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            EEventNotSpecified+
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            };+
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+
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    public: // Interface+
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+
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        /**+
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         * Handle events.+
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         * @param aEvent Event to handle.+
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         * @param aMessage, Event occurred because of message+
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         */+
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        virtual void HandleChatEvent( TChatEventType aEvent, MCAMessage* aMessage = NULL ) = 0;+
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+
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    protected: // For protection.+
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+
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        /**+
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         * Destructor+
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         */+
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        virtual ~MCAChatObserver() {}+
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    };+
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+
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#endif      // __MCACHATOBSERVER_H__+
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+
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// End of File+
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