/*

* Copyright (c) 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: Obsererver for Set System Locked event 

*

*/

#ifndef     __SCPLOCKOBSERVER_H

#define     __SCPLOCKOBSERVER_H

#include <e32svr.h>

#include <e32property.h>

#include "secui.hrh"

class CSCPQueryDialog;

NONSHARABLE_CLASS(CSCPLockObserver): public CActive

    {

    public:

        enum TCurrCallStatus {

            EInProgress = 34221,

            EEnded

        };

		/**

        * Creates instance of the CLockObserver class.

        *

		* @param aDialog (pointer to code dialog)

		* @return Returns the instance just created.

        */

        static CSCPLockObserver* NewL(CSCPQueryDialog* aDialog, TInt aType  = ESecUiDeviceLockObserver);

		/**

        * Destructor.

        */

		~CSCPLockObserver();

		/**

        * Stops listenig PubSub events.

        */

		void StopObserver(); 

		/**

        * Starts listenig PubSub events.

        */

		void StartObserver();

		/**

        * Sets the dialog's address.

        */

		void SetAddress(CSCPQueryDialog* aDialog);    

	private:

        /**

        * Starts asynchronic listening KUidAutolockStatus event

        *

		* @return KErrNone: if no errors

        * @return KErrInUse: if already listening

		*/

		TInt Start();            

    private: // constructors

		/**

        * C++ default constructor.

		*

		* @param aDialog (pointer to code dialog)

        */

        CSCPLockObserver(CSCPQueryDialog* aDialog, TInt aType);

		 /**

        * Symbian OS constructor.

        */

        void ConstructL();

    private: // from CActive

         /** @see CActive::RunL() */

		void RunL();

		TInt RunError(TInt aError);

		/** @see CActive::DoCancel() */

        void DoCancel();

    private: // data

        CSCPQueryDialog*      iDialog; //not owned!

        RProperty            iProperty;

        TInt                 iType; //Type of the observer

        TBool                iInformCallEnding;

        TInt                 iSubscribedToEvent;

        TInt                 iPrevCallState;

    };

#endif 

// End of file