// Copyright (c) 2008-2009 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 HWRMPOWER_H_

#define HWRMPOWER_H_

// INCLUDES

#include <e32base.h>

#include <e32cmn.h> 

// CONSTANTS

// FORWARD DECLARATIONS

class CHWRMPowerImpl;

class MHWRMBatteryPowerObserver;

#ifdef SYMBIAN_HWRM_EXTPOWERINFO

class MHWRMBatteryChargingStatusObserver;

class MHWRMBatteryChargingCurrentObserver;

class MHWRMBatteryFullChargingTimeObserver;

#endif //SYMBIAN_HWRM_EXTPOWERINFO

/**

* HW Resource Manager Power API is a library API providing the 

* ability to request detailed information regarding the battery 

* capacity, voltage and current consumption.

*

* The API consists of the classes CHWRMPower, MHWRMBatteryConsumptionObserver

* and MHWRMBatteryVoltageObserver. If the client requires periodical measurements

* of the Average Voltage and/or Average Consumption, it should also provide callback pointer

* of the MHWRMBatteryConsumptionObserver and/or MHWRMBatteryVoltageObserver

* implementing class for the NewL() method.

*

* Usage:

*

* @code

* #include <hwrmpower.h> 

*

* // A CHWRMPower instance can be created by using NewL() or NewLC() methods. 

* // Periodical measurements are required so callbacks are provided. Assume 

* // the calling object implements  both interfaces.

* CHWRMPower* power = CHWRMPower::NewL(this, this);

*

* // Get battery info.

* TRequestStatus& status;

* TBatteryConsumptionData batteryConsumptionData;

* power->GetBatteryInfo(status, batteryConsumptionData); 

* 

* User::WaitForRequest(status);

* User::LeaveIfError(status.Int());

* 

* // Start receiving periodical voltage measurements.

* TRequestStatus& statusStart;

* TIntervalMultiple intervalMultiple = EThreeTimesBaseTimeInterval;

* power->StartAverageVoltageReporting(statusStart, intervalMultiple);

*  

* User::WaitForRequest(statusStart);

* User::LeaveIfError(statusStart.Int());

* 

* // Measurements are being when the ProcessVoltageMeasurement() method 

* // of the MHWRMBatteryVoltageObserver interface is called.

*  

* // Stop receiving measurements when done

* power->StopAverageVoltageReportingL(); 

*

* // To clean up, delete the created object:

* delete power;

* @endcode

*

* @publishedAll

* @released

*/

NONSHARABLE_CLASS(CHWRMPower) : public CBase

    {            

public:

	/**

	* Data structure used to retreive data from a call to GetBatteryVoltageInfo

	*/ 

	struct TBatteryVoltageData 

		{

		TInt iRemainingVoltage;

		TInt iMaximumVoltage;

		TInt iMinimumVoltage;

		};

	/**

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

	*/ 

    struct TBatteryConsumptionData 

	 	{

	 	TInt iNominalCapacity;

	 	TInt iRemainingCapacity;

	 	TInt iRemainingPercentageCapacity;

	 	};

    /**

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

    	*/

    struct TBatteryPowerMeasurementData 

        {

        TInt iAverageVoltage;

        TInt iAverageCurrent;

        };  

#ifdef SYMBIAN_HWRM_EXTPOWERINFO

    /* The type of charger connected to the device.*/

    enum TBatteryChargerType 

        { 

        EBatteryChargerUnKnown = 0, 

        EBatteryChargerDedicated = 1, 

        EBatteryChargerUsbDedicated = 2,

        EBatteryChargerUsbHost = 3 

        };

    /* The current charging status of the device. */

    enum TBatteryChargingStatus

        {

        EChargingStatusError              = -1, 

        EChargingStatusNotConnected       = 0,  

        EChargingStatusCharging           = 1,  

        EChargingStatusNotCharging        = 2,  

        EChargingStatusAlmostComplete     = 3,  

        EChargingStatusChargingComplete   = 4,  

        EChargingStatusChargingContinued  = 5  

        };

    /* Used to stop the ongoing charging notification. 

     * EChargingNotifierAll used to stop charging current and charging 

     * time notifications. */

    enum TBatteryChargingNotifier

        {

        EChargingNotifierAll = 0,

        EChargingNotifierChargingCurrent = 1,

        EChargingNotifierBatteryFullChargingTime = 2

        };

#endif //SYMBIAN_HWRM_EXTPOWERINFO

public:	

    IMPORT_C ~CHWRMPower();

    IMPORT_C static CHWRMPower* NewL();

    IMPORT_C static CHWRMPower* NewLC();

public: // New functions

	IMPORT_C void GetBatteryInfo(TRequestStatus& aStatus, TBatteryConsumptionData& aBatteryConsumptionData);

    IMPORT_C void GetBatteryVoltageInfo(TRequestStatus& aStatus, TBatteryVoltageData& aBatteryVoltageData);

    IMPORT_C void GetBaseTimeIntervalL(TInt &aBaseTimeInterval);

    IMPORT_C TInt SetPowerReportObserver(MHWRMBatteryPowerObserver* aPowerReportCallback);

    IMPORT_C TInt StartAveragePowerReporting(TRequestStatus& aStatus, const TUint& aInterval);

    IMPORT_C void StopAveragePowerReportingL(); 

#ifdef SYMBIAN_HWRM_EXTPOWERINFO 

    IMPORT_C TInt GetBatteryChargerType(TBatteryChargerType& aChargerType);

    IMPORT_C TInt GetBatteryChargingStatus(TBatteryChargingStatus& aChargingStatus);

    IMPORT_C TInt SetBatteryChargingObserver(

             MHWRMBatteryChargingStatusObserver*   aChargingStatusCallback,

             MHWRMBatteryChargingCurrentObserver*     aChrgCurrentCallback,

             MHWRMBatteryFullChargingTimeObserver* aChrgTimeCallback);

    IMPORT_C TInt NotifyAverageChargingCurrent(TRequestStatus& aStatus, const TUint& aInterval);

    IMPORT_C TInt NotifyBatteryFullChargingTime(TRequestStatus& aStatus);

    IMPORT_C void StopChargingNotificationL(TBatteryChargingNotifier aNotifier);

#endif //SYMBIAN_HWRM_EXTPOWERINFO

private:

	void ConstructL();

private:

	CHWRMPowerImpl* iPowerImpl;	

    };

/**

* A callback interface for power measurements reporting.

*

* If the client requires periodical measurements of the Average Power,

* it needs to derive a class from the MHWRMBatteryPowerObserver interface

* and implement the PowerMeasurement() method. 

* 

* A callback object header example:

*

* @code 

* // INCLUDES

* #include <hwrmpower.h> // Link against HWRMPowerClient.lib.

*

* class CTest : public CBase, 

*               public MHWRMBatteryPowerObserver    

*    {

*    public:

*        CTest();

*        ~CTest();

*                       

*        void ConstructL();

*        static CTest* NewL();

*                

*        // from MHWRMBatteryPowerObserver

*        virtual void PowerMeasurement(TInt aErr, CHWRMPower::TBatteryPowerMeasurementData& aMeasurement);

*

*    private:

*        CHWRMPower* iPower;

*    };

* @endcode

*

* A callback method implementation example:

*

* @code

* void CTest::PowerMeasurement(TInt aErr, CHWRMPower::TBatteryPowerMeasurementData& aMeasurement);

*    {

*  	 if (aErrorCode == KErrNone)

*	 	{

*		INFO_PRINTF2(_L("INFO: Power Measurement Received, averageVolatge=%d, averageCurrent=%d"),aMeasurement.iAverageVoltage, aMeasurement.iAverageCurrent);

*		}

*	 else

*		{

*		INFO_PRINTF2(_L("INFO: Power Measurement Measurement Error, error=%d"),aErr);

*		}

*    }

* @endcode

*

* @publishedAll

* @released

*/

class MHWRMBatteryPowerObserver

    {

public:

    /** 

    * Called when a Power(Voltage and Current) consumption measurement value is received.

    *

    * @param aErr Error code. 

    * @param aMeasurement The Average Power value calculated by the plugin. Valid only when aErr == KErrNone.

    */

    virtual void PowerMeasurement(TInt aErr, CHWRMPower::TBatteryPowerMeasurementData& aMeasurement)=0;   

    };

#ifdef SYMBIAN_HWRM_EXTPOWERINFO

/**

* A callback interface for charging status change.

*

* If the client requires charging status change notofication,

* it needs to derive a class from the MHWRMBatteryChargingStatusObserver interface

* and implement the ChargingStatusChange() method. 

* 

* A callback object header example:

*

* @code 

* // INCLUDES

class CTest : public CBase, 

              public MHWRMBatteryChargingStatusObserver

   {

    public:

        CTest();

        ~CTest();

        void ConstructL();

        static CTest* NewL();

        // from MHWRMBatteryChargingStatusObserver

        virtual void ChargingStatusChange( Tint aErrCode,

                   CHWRMPower::TBatteryChargingStatus aChrgStatus);

   };

* @endcode   

* A callback method implementation example:

*

* @code

void CTest:: ChargingStatusChange(TInt aErrorCode,

                          CHWRMPower::TBatteryChargingStatus aChrgStatus);

   {

      if (aErrorCode == KErrNone)

      {

      INFO_PRINTF2(_L("Charging status = %d"), aChrgStatus);

      }

     else

      {

      INFO_PRINTF2(_L("Error, error=%d"),aErrorCode);

      }

   }

* @endcode  

*

* @publishedAll

* @released

*/

class MHWRMBatteryChargingStatusObserver

    {

public:

    /** 

    * Called when a charging status is changed.

    *

    * @param aErrCode Error code. 

    * @param aChrgStatus Charging status.

    */

    virtual void ChargingStatusChange( TInt aErrCode,

                                      CHWRMPower::TBatteryChargingStatus aChrgStatus)=0;

};

/**

* A callback interface for charging current measurements reporting.

*

* If the client requires periodical measurements of the charging current measurements,

* it needs to derive a class from the MHWRMBatteryChargingCurrentObserver interface

* and implement the AverageChargingCurrentChange() method. 

* 

* A callback object header example:

*

* @code 

* // INCLUDES

class CTest : public CBase, 

              public MHWRMBatteryChargingStatusObserver

   {

    public:

        CTest();

        ~CTest();

        void ConstructL();

        static CTest* NewL();

        // from MHWRMBatteryChargingStatusObserver

        virtual void AverageChargingCurrentRateChange(

                           TInt aErrCode, TInt aMeasurement);

   };

* @endcode   

* A callback method implementation example:

*

* @code

// Notification handler

void CTest::ChargingCurrentChange(

                           TInt aErrorCode, TInt aMeasurement)

  {

      if (aErrorCode == KErrNone)

      {

      INFO_PRINTF2(_L("Charging current = %d"), aMeasurement);

      }

     else

      {

      INFO_PRINTF2(_L("Error, error=%d"),aErrorCode);

      }

   }

* @endcode  

*

* @publishedAll

* @released

*/

class MHWRMBatteryChargingCurrentObserver

    {

   /** 

    * Called when a charging current measurement value is received.

    *

    * @param aErrCode Error code. 

    * @param aMeasurement The Average Charging current value calculated by the plugin.

             Valid only when aErr == KErrNone.

    */

    public:

        virtual void AverageChargingCurrentChange(TInt aErrCode, TInt aMeasurement)=0;

    };

/**

* A callback interface for remaining charging time notification.

*

* If the client requires remaining charging time notification,

* it needs to derive a class from the MHWRMBatteryFullChargingTimeObserver interface

* and implement the BatteryFullChargingTimeChange() method. 

* 

* A callback object header example:

*

* @code 

* // INCLUDES

class CTest : public CBase, 

              public MHWRMBatteryFullChargingTimeObserver

   {

    public:

        CTest();

        ~CTest();

        void ConstructL();

        static CTest* NewL();

        // from MHWRMBatteryChargingStatusObserver

        virtual void BatteryFullChargingTimeChange(

                           TInt aErrCode, TInt aMeasurement);

   };

* @endcode   

* A callback method implementation example:

*

* @code

// Notification handler

void CTest::BatteryFullChargingTimeChange(

                              TInt aErrorCode, TUint aTime)

   {

      if (aErrorCode == KErrNone)

      {

      INFO_PRINTF2(_L("Remaining charging time = %d"), aTime);

      }

     else

      {

      INFO_PRINTF2(_L("Error, error=%d"),aErrorCode);

      }

   }

* @endcode  

*

* @publishedAll

* @released

*/

class MHWRMBatteryFullChargingTimeObserver

    {

   /** 

    * Called when a full charging current time measurement value is received.

    *

    * @param aErrCode Error code. 

    * @param aTime Time required for full charging of Battery.

             Valid only when aErrCode == KErrNone.

    */

    public:

        virtual void BatteryFullChargingTimeChange(TInt aErrCode, TUint aTime)=0;

    };

#endif //SYMBIAN_HWRM_EXTPOWERINFO

#endif /*HWRMPOWER_H_*/

// End of File