/*

* Copyright (c) 2002 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:  Header file for the CCbsUiTopicListMonitor class.

*

*

*/

#ifndef     CCBSUITOPICLISTMONITOR_H

#define     CCBSUITOPICLISTMONITOR_H

// INCLUDES

#include <e32base.h>

#include <CbsCommon.h>

//  FORWARD DECLARATIONS

class MCbs;

class MCbsUiTopicMonitorObserver;

//  CLASS DEFINITIONS 

/**

*  Monitors topic related events.  

*/

class CCbsUiTopicListMonitor : public CActive

    {

    public: // New functions

        /**

        * Create an instance of the class. 

        *

        * @param aServer cbs server

        */

        static CCbsUiTopicListMonitor* NewL( MCbs& aServer );

        /**

        * Destructor.

        */

        ~CCbsUiTopicListMonitor();

        /**

        * Issues the request.

        */

        void IssueRequest();

    public: // From CActive

        /**

        * It is called when server notifies.

        */

        void RunL();

        /**

        * Cancels the request.

        */

        void DoCancel();

    public: // New functions

        /**

        * Adds a observer to this monitor.

        *

        * @param aObserver Observer to be added.

        */

        void AddObserverL( MCbsUiTopicMonitorObserver* aObserver );

    private:

        typedef CArrayFixFlat<MCbsUiTopicMonitorObserver*>

            TCbsUiMonitorObservers;

        /**

        * Constructor.

        *

        * @param aServer cbs server

        */

        CCbsUiTopicListMonitor( MCbs& aServer );

        /**

        * Finalizes the construction.

        */

        void ConstructL();

    private: // Data

        // ETrue if request is active.

        TBool iContinue;

        // To issue the request.

        MCbs& iServer;

        // Observers who are interested in topic changes.

        // Monitor doesn't own the observers.

        TCbsUiMonitorObservers* iObservers;

        // Which topic handle the event is conserning.

        TCbsTopicNumber iTopicNumber;

        // What kind of event has been.

        TCbsTopicListEvent iEvent;

    };

#endif      //  CCBSUITOPICLISTMONITOR_H

// End of File