watchdog/inc/wdshutdownobserver.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 16:17:23 +0300
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/*
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* Copyright (c) 2009 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:  Shutdown observer
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*
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*/
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#ifndef WDSHUTDOWNOBSERVER_H
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#define WDSHUTDOWNOBSERVER_H
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#include <e32base.h>
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#include <w32std.h>
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#include <e32property.h> 
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/**
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 * Observer interface for signaling the need for shutdown
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 */
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class MWDShutdownObserver
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    {
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public:
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    virtual void ShutdownNotification() = 0;
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    virtual void RestartNotification() = 0;
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    };
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/**
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 *  Active object for observing P&S keys
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 *
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 *  @since S60 v5.0
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 */
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class CWDShutdownObserver  : public CActive
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    {
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public:
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    /**
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     * Two-phased constructor.
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     *
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     * @since S60 v5.0
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     * @return Instance of CTMShutdownObserver.
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     */
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    IMPORT_C static CWDShutdownObserver* NewL( MWDShutdownObserver& aObserver/*, const TUid& aKeyCategory*/ );
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    /**
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     * Destructor
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     *
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     * @since S60 v5.0
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     */
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    virtual ~CWDShutdownObserver();
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protected:
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    /**
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     * Handles an active object's request completion event.
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     *
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     * @since S60 v5.0
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     */
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    void RunL();
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    /**
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     * Implements cancellation of an outstanding request.
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     *
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     * @since S60 v5.0
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     */
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    void DoCancel();
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    TInt RunError( TInt aError );
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private:
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    /**
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     * C++ default constructor
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     *
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     * @since S60 v5.0
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     * @return Instance of CShutdownObserver.
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     */
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    CWDShutdownObserver( MWDShutdownObserver& aObserver/*, const TUid& aKeyCategory*/ );
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    /**
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     * Symbian 2nd phase constructor can leave.
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     *
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     * @since S60 v5.0
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     */
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    void ConstructL();
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private:
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    // not own
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    MWDShutdownObserver& iObserver;
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    /*const TUid& iKeyCategory;*/
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    RProperty iProperty;
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};
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#endif // SHUTDOWNOBSERVER_H