/*

* Copyright (c) 2002-2007 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:  

*

*/

#ifndef C_CSCPPROPERTYNOTIFIER_H

#define C_CSCPPROPERTYNOTIFIER_H

#include <e32base.h>

#include <e32property.h>

class MScpPropertyObserver;

/**

*  Property notifier

*

*/

class CScpPropertyNotifier : public CActive

    {

public:

    /**

     * Two-phased constructor.

     */

    static CScpPropertyNotifier* NewL( TUid aUid, 

                                       TInt aType,

                                       MScpPropertyObserver& aObserver  );

    /**

     * Destructor.

     */

    virtual ~CScpPropertyNotifier();

    /**

     * Returns the property's value

     * @param aValue Value

     * @return Symbian error codes

     */

    TInt GetValue( TInt& aValue ) const;

// From CActive         

private:

    /**

     * RunL

     */

    void RunL();

    /**

     * Catches errors if RunL leaves

     * @param aError error code

     * @return error code

     */

    TInt RunError( TInt aError );

    /**

     * Cancels the monitor

     */

    void DoCancel();  

private:

    /**

     * C++ default constructor.

     */

    CScpPropertyNotifier( TUid aUid, 

                          TInt aType, 

                          MScpPropertyObserver& aObserver );

    /**

     * ConstructL

     */

    void ConstructL();

    /**

     * Subscribes to property's notifications

     */

    void Subscribe();

private:

    /**

     * UID of the property

     */

    TUid iUid;

    /**

     * Property type

     */

    TInt iType; 

    /**

     * Property observer

     */

    MScpPropertyObserver& iObserver;

    /**

     * Property

     */

    RProperty iProperty;

#ifdef _DEBUG

friend class T_CScpPropertyNotifier;

#endif

    };

#endif      // C_CSCPPROPERTYNOTIFIER_H   

// End of File