/*

* Copyright (c) 2002-2006 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:  Notifies the changes in publish and suscripe properties.

*

*/

#ifndef CSATPSCHANGENOTIFIER_H

#define CSATPSCHANGENOTIFIER_H

//  INCLUDES

#include <e32base.h>

#include <e32property.h>

#include "MSatSystemStateChangeNotifier.h"

// FORWARD DECLARATION

class MSatSystemStateObserver;

// CLASS DECLARATION

/**

*  Notifies the changes in publish and suscripe properties.

*

*  @lib SatSystemState

*  @since Series 60 3.0

*/

class CSatPSChangeNotifier : public CActive,

                             public MSatSystemStateChangeNotifier

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aPropertyKey This is the P&S key.

        * @param aPropertyValue Value of the P&S key.

        * @param aObserver A class that is notified when value changes.

        * @param aNotifyValue Defines the value that causes the notification.

        */

        static CSatPSChangeNotifier* NewL(

            const TUid& aPropertyKey,

            TUint aPropertyValue,

            MSatSystemStateObserver& aObserver,

            TInt aNotifyValue = -1 );

        /**

        * Destructor.

        */

        virtual ~CSatPSChangeNotifier();

    public: // Functions from base classes

        /**

        * From MSatSystemStateChangeNotifier Request a notification of a

        * change in system state.

        */

        void NotifyChangeL();

        /**

        * From MSatSystemStateChangeNotifier Cancels the notification request.

        */

        void CancelNotify();

        /**

        * From MSatSystemStateChangeNotifier Gets the current value.

        * @return Current value for earlier request.

        */

        TInt GetValueInt();

    protected:  // Functions from base classes

        /**

        * From CActive

        */

        void DoCancel();

        /**

        * From CActive.

        */

        void RunL();

    private: // New methods

        /**

        * Makes the request and activates the active object.

        */

        void Activate();

    private:

        /**

        * C++ default constructor.

        * @param aPropertyKey This is the P&S key.

        * @param aPropertyValue Value of the P&S key.

        * @param aObserver A class that is notified when value changes.

        * @param aNotifyValue Defines the value that causes the notification.

        */

        CSatPSChangeNotifier(

            const TUid& aPropertyKey,

            TUint aPropertyValue,

            MSatSystemStateObserver& aObserver,

            TInt aNotifyValue );

    private:    // Data

        // Change observer.

        MSatSystemStateObserver& iObserver;

        // Publish & suscripe handle.

        RProperty iPSClient;

        // Publish&Suscripe property key

        TUid iPSKey;

        // Publish&Suscripe property value

        TUint iPSValue;

        // Value of the property when observer should be notified

        // If this is not set, the changed value is sent to observer

        TInt iNotifyValue;

    };

#endif      // CSATPSCHANGENOTIFIER_H

// End of File