/*
* Copyright (c) 2008-2009 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: Provides a simple observable interface.
*
*/
#ifndef M_GLXSIMPLEOBSERVABLE_H
#define M_GLXSIMPLEOBSERVABLE_H
#include <e32base.h>
#include "glxsimpleobserverevents.h"
class MGlxSimpleObserver;
/**
* MGlxSimpleObservable
*
* Provides a simple observable interface.
*
* @lib glxhuiutils.lib
*/
class MGlxSimpleObservable
{
public:
/**
* Registers an observer if not previously registered
* @param aObserver The observer concerned
*/
virtual void RegisterObserverL( MGlxSimpleObserver* aObserver ) = 0;
/**
* Deregisters an observer if previously registered
* @param aObserver The observer concerned
*/
virtual void DeregisterObserver( MGlxSimpleObserver* aObserver ) = 0;
};
#endif // M_GLXSIMPLEOBSERVABLE_H