/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 AKNSLIDESTATUSNOTIFIER_H

#define AKNSLIDESTATUSNOTIFIER_H

#include <e32base.h>

#include <e32property.h>

//Grip keys

#include <hwrmdomainpskeys.h>

class MAknSlideStatusObserver

    {

    public:

   /**

    * Slide status notification

    * Called by the notifier when the Slide status value change 

	*

    * @param aValue the new status value

    * @return none

    */

    virtual void SlideStatusChangedL( const TInt& aValue ) = 0;

    };

/**

 *  Reacts to Slide status changes

 *

 *  Reacts to Slide status changes and notifies

 *  its client(s) about the status change

 */

class CAknSlideStatusNotifier : public CActive

    {

    public:

        /**

         * Symbian two-phase constructor

	     *

	     * @param a pointer to Slide status observer

	     * @return a pointer to CSlideStatusNotifier instance

         */ 

        static CAknSlideStatusNotifier* NewL( MAknSlideStatusObserver* aObserver );

        /**

         * Symbian two-phase constructor leaving a pointer to the constructed 

         * object on the cleanup stack

	     *

	     * @param a pointer to Slide status observer

	     * @return a pointer to CSlideStatusNotifier instance

         */

        static CAknSlideStatusNotifier* NewLC( MAknSlideStatusObserver* aObserver );

        /**

         * Default destructor

         */

        virtual ~CAknSlideStatusNotifier();

    protected:

        // From base class CActive    

        /**

         * From CActive.

         * Implements cancellation of an outstanding request.

         *

         * @param none

         */

        void DoCancel();

        /**

         * From CActive.

         * Handles an active object's request completion event

         *

         * @param none

         */

        void RunL();

        /**

         * From CActive.

         * Handles an active object's request error event

         *

         * @param TInt aError

         */

        TInt RunError( TInt aError );

    private: 

        /** 

         * C++ default constructor

         * 

         * @param none 

         */

        CAknSlideStatusNotifier();

        /**

         * Symbian second phase constructor

         * 

         * @param a pointer to Slide status observer 

         */

        void ConstructL( MAknSlideStatusObserver* aObserver );

    private: // Data   

        /**

         * Property handle used to read P&S variables

         */

        RProperty iProperty;

        /**

         * The observer interested in the Slide status

         * Not own.  

         */

        MAknSlideStatusObserver* iObserver;

    };

#endif //AKNSLIDESTATUSNOTIFIER_H