/*

* Copyright (c) 2002-2005 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:  Monitor of idle screen availability.

*

*/

#ifndef CSATIDLESCREENMONITOR_H

#define CSATIDLESCREENMONITOR_H

//  INCLUDES

#include "MSatSystemStateObserver.h"

#include "CSatEventMonitorHandler.h"

// CLASS DECLARATION

class MSatSystemStateChangeNotifier;

/**

*  Monitors idle screen state and informs SAT Engine if idle screen is available

*

*  @lib EventMonitors.lib

*  @since Series 60 3.0

*/

class CSatIdleScreenMonitor : public CSatEventMonitorHandler,

                              public MSatSystemStateObserver

    {

    public:  // Constructor and destructor

        /**

        * Two-phased constructor.

        * @param aUtils Interface for Event monitor utils

        */

        static CSatIdleScreenMonitor* NewL(

            MSatEventMonitorUtils& aUtils );

        /**

        * Destructor.

        */

        virtual ~CSatIdleScreenMonitor();

    public: // From base class

        /**

        * From CSatEventMonitorHandler Cancels event monitoring

        */

        void DoCancelMonitor();

        /**

        * From MSatSystemStateObserver Notifies that system state changed.

        */

        void StateChanged();

    protected: // New functions

        /**

        * From CSatEventMonitorHandler Starts event monitoring

        * @return Error code indicating the status of starting the monitor

        */

        TInt StartMonitor();

    private:

        /**

        * C++ default constructor.

        * @param aUtils Interface for Event monitor utils

        */

        CSatIdleScreenMonitor( MSatEventMonitorUtils& aUtils );

        // ConstructL

        void ConstructL();

    private: // Data

        // P&S change notifier

        MSatSystemStateChangeNotifier* iPSNotifier;

    };

#endif      // CSATIDLESCREENMONITOR_H

// End of File