/*

* Copyright (c) 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:  Controls observers and publishes state changes

 *

*/

#ifndef __LOCKAPPOBSERVERLIST_H__

#define __LOCKAPPOBSERVERLIST_H__

// INCLUDES

#include <coecntrl.h>

#include "lockapp.hrh"

// FORWARD DECLARATIONS

class MLockAppStateObserver;

/**

 *  CLockAppObserverList class publishes lock state changes to all implemented state 

 *  observers. The list owns all childs and it is responsible for deleting them.

 *

 *  @lib    lockapp

 *  @since  5.0

 *  @author Joona Petrell

 *  @author Tamas Koteles

 */

class CLockAppObserverList : public CCoeControl

    {

    public:

        /**

         * C++ default constructor.

         */

        CLockAppObserverList( );

        /**

         * Destructor.

         */

        virtual ~CLockAppObserverList( );

    public:

        /**

         * Add new state observer.

         * @param aObserver lock state observer

         */

        void AddObserverL( MLockAppStateObserver* aObserver );

        /**

         * Remove lock state observer.

         * @param aObserver lock state observer

         */

        void RemoveObserver( MLockAppStateObserver* aObserver );

    protected:

        /**

         * Has to be called by the derived class in the construction.

         */

        void BaseConstructL( );

        /**

         * Informs all observers about the status change.

         *

         * @param aStatusChange the new lock state.

         */

        void PostStatusChangeL( TLockStatus aStatusChange );

        /**

         * Class that derives from observer list will have first

         * notification about the lock status chane.

         *

         * @param aLockStatus the new lock state.

         */

        virtual void HandleLockStatusChangedL( TLockStatus aLockStatus );

    private:

        /**

         * Dynamic list storing observers. Both the list and observers are owned.

         * Own.

         */

        RPointerArray<MLockAppStateObserver>* iObserverList;

    };

#endif // __LOCKAPPOBSERVERLIST_H__

// End of File