/*

* Copyright (c) 2007-2009 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 BATTERY_INFO_OBSERVER

#define BATTERY_INFO_OBSERVER

// INCLUDES

#include <e32base.h>

#include <hwrmpower.h>

// CONSTANTS

const TInt KHalfSecond = 500000;

const TInt KTwoMins = 120000000;

// CLASS DECLARATION

/**

* MBatteryInfoNotifier

* Interface class for NotifyBatteryInfo()

*/

class MBatteryInfoNotifier

    {

    public:

        /**

        * Notifier for battery info changes

        *

        * @param aError error code

        * @param aBatteryData data structure to battery data

        */

        virtual void NotifyBatteryInfo( TInt aError,

            CHWRMPower::TBatteryConsumptionData aBatteryData ) = 0;

    };

// CLASS DECLARATION

/**

* CBatteryInfoObserver is used to provide battery information from HWRM to CTSY

*/

NONSHARABLE_CLASS( CBatteryInfoObserver ) : public CActive

	{

    public:

        /**

        * Two-phased constructor

        *

        * @param aPower reference to CHWRMPower instance

        * @param aBatteryInfoNotifier reference to interface class

        *  MBatteryInfoNotifier

        * @return Pointer to the created object

        */

    	static CBatteryInfoObserver* NewL( CHWRMPower& aPower,

    	    MBatteryInfoNotifier& aBatteryInfoNotifier );

    	/**

    	* Two-phased constructor

    	*

    	* @param aPower reference to CHWRMPower instance

    	* @param aBatteryInfoNotifier reference to interface class

    	*  MBatteryInfoNotifier

    	* @return Pointer to the created object

    	*/

    	static CBatteryInfoObserver* NewLC( CHWRMPower& aPower,

    	    MBatteryInfoNotifier& aBatteryInfoNotifier );

    	/**

        * Destructor

        */

    	~CBatteryInfoObserver();

    	/**

    	* Handles GetBatteryInfo request completion event

    	*/

    	void RunL();

        /**

    	* Cancellation of an outstanding request

    	*/

    	void DoCancel();

    	/**

    	* Get battery info

    	*/

    	void GetBatteryInfo();

    	/**

    	* Run timer 

    	*

    	* @param aObject pointer to object which start timer

        * @return TInt KErrNone because callback function is intended to be

        * called again

    	*/

    	static TInt RunTimer(TAny* aObject);

    private:

        /**

        * By default Symbian 2nd phase constructor is private

        */

    	void ConstructL();

    	/**

        * Constructor

        *

        * @param aPower reference to CHWRMPower instance

        * @param aBatteryInfoNotifier reference to interface class 

        * MBatteryInfoNotifier

        */

    	CBatteryInfoObserver( CHWRMPower& aPower,

    	    MBatteryInfoNotifier& aBatteryInfoNotifier );

    private:

    	/**

    	* Reference to CHWRMPower instance

    	*/

        CHWRMPower& iPower;

        /**

        * Data structure used to retrieve data from a call to GetBatteryInfo

        */

        CHWRMPower::TBatteryConsumptionData iBatteryData;

        /**

        * Reference to BatteryInfoNotifier object

        */

        MBatteryInfoNotifier& iBatteryInfoNotifier;

        /**

        * Periodic timer

        */

        CPeriodic* iPeriodic;

	};

#endif /*BATTERY_INFO_OBSERVER*/

//  End of File