terminalsecurity/SCP/SCPClient/inc/SCPLockObserver.h
author hgs
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/*
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* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Obsererver for Set System Locked event 
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*
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*/
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#ifndef     __SCPLOCKOBSERVER_H
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#define     __SCPLOCKOBSERVER_H
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#include <e32svr.h>
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#include <e32property.h>
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#include "secui.hrh"
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class CSCPQueryDialog;
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NONSHARABLE_CLASS(CSCPLockObserver): public CActive
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    {
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    public:
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		/**
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        * Creates instance of the CLockObserver class.
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        *
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		* @param aDialog (pointer to code dialog)
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		* @return Returns the instance just created.
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        */
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        static CSCPLockObserver* NewL(CSCPQueryDialog* aDialog, TInt aType  = ESecUiDeviceLockObserver);
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		/**
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        * Destructor.
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        */
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		~CSCPLockObserver();
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		/**
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        * Stops listenig PubSub events.
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        */
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		void StopObserver(); 
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		/**
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        * Starts listenig PubSub events.
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        */
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		void StartObserver();
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		/**
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        * Sets the dialog's address.
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        */
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		void SetAddress(CSCPQueryDialog* aDialog);    
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	private:
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        /**
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        * Starts asynchronic listening KUidAutolockStatus event
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        *
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		* @return KErrNone: if no errors
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        * @return KErrInUse: if already listening
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		*/
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		TInt Start();            
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    private: // constructors
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		/**
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        * C++ default constructor.
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		*
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		* @param aDialog (pointer to code dialog)
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        */
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        CSCPLockObserver(CSCPQueryDialog* aDialog, TInt aType);
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		 /**
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        * Symbian OS constructor.
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        */
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        void ConstructL();
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    private: // from CActive
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         /** @see CActive::RunL() */
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		void RunL();
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		/** @see CActive::DoCancel() */
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        void DoCancel();
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    private: // data
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        CSCPQueryDialog*      iDialog; //not owned!
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        RProperty            iProperty;
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        TBool				 iSubscribedToEvent;
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        TInt                 iType; //Type of the observer
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    };
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#endif 
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// End of file