/*

* Copyright (c) 2006-2007 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:  TM Shutdown Observer

 *

*/

#ifndef TMSHUTDOWNOBSERVER_H

#define TMSHUTDOWNOBSERVER_H

#include <e32base.h>

#include <w32std.h>

#include <e32property.h> 

/**

 * Observer interface for signaling the need for shutdown

 */

class MTMShutdownObserver

    {

public:

    virtual void ShutdownNotification() = 0;

    };

/**

 *  Active object for observing P&S keys

 *

 *  @since S60 v5.0

 */

class CTMShutdownObserver: public CActive

    {

public:

    /**

     * Two-phased constructor.

     *

     * @since S60 v5.0

     * @return Instance of CTMShutdownObserver.

     */

    static CTMShutdownObserver* NewL( MTMShutdownObserver& aObserver, const TUid& aKeyCategory,

                                      const TInt aPropertyKey, TBool aDefineKey);

    /**

     * Destructor

     *

     * @since S60 v5.0

     */

    virtual ~CTMShutdownObserver();

protected:

    /**

     * Handles an active object's request completion event.

     *

     * @since S60 v5.0

     */

    void RunL();

    /**

     * Implements cancellation of an outstanding request.

     *

     * @since S60 v5.0

     */

    void DoCancel();

private:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     * @return Instance of CTMShutdownObserver.

     */

    CTMShutdownObserver( MTMShutdownObserver& aObserver, const TUid& aKeyCategory,

                         const TInt iPropertyKey, TBool aDefineKey);

    /**

     * Symbian 2nd phase constructor can leave.

     *

     * @since S60 v5.0

     */

    void ConstructL();

private:

    // not own

    MTMShutdownObserver& iObserver;

    const TUid& iKeyCategory;

    RProperty iProperty;

    TInt iPropertyKey;

    TBool iDefineKey;

};

#endif // TMSHUTDOWNOBSERVER_H