/*

* Copyright (c) 2006-2009 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 HWRMFMTXSTATUSOBSERVER_H

#define HWRMFMTXSTATUSOBSERVER_H

// INCLUDES

#include <e32base.h>

#include <hwrm/hwrmfmtx.h>

#include <e32property.h>

// CLASS DECLARATION

/**

* Active object wrapper for Publish and Subscribe one-shot notification handling.

* Listens for changes in FM Tx status and notifies the client.

*/

NONSHARABLE_CLASS(CHWRMFmTxStatusObserver) : public CActive

    {

    public:

        /**

        * This is a two-phase constructor method that is used to

        * create a new instance of CHWRMFmTxStatusObserver.

        * A newly created instance immediately starts listening to FM Tx status changes.

        *

        * @param aCallback Pointer to a callback instance. Can be NULL.

        * @return A pointer to a new instance of the CHWRMFmTxStatusObserver class.

        */

        static CHWRMFmTxStatusObserver* NewL(MHWRMFmTxObserver* aCallback);

        /**

        * Destructor.

        */

        virtual ~CHWRMFmTxStatusObserver();

        /**

        * This method retrieves the current FM Tx state. 

        *

        * @return TFMTxState indicating the current FM Tx state.

        */

        TFmTxState Status();

    protected:

        // From CActive

        void RunL();

        TInt RunError(TInt aError);

        void DoCancel();

    private:

        /**

        * Constructor

        *

        * @param aCallback Pointer to a callback instance.

        */

        CHWRMFmTxStatusObserver(MHWRMFmTxObserver* aCallback);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

        /*

        * Order notification

        */

        void OrderNotification();

    private:

        MHWRMFmTxObserver* iCallback;      // Not owned by this class. Can be NULL.

        RProperty iProperty;               // P&S property

        TFmTxState iFmTxState; // Keeps track of last received status value

    };

#endif      // HWRMFMTXSTATUSOBSERVER_H

// End of File