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#ifndef MAGNETOMETERSENSORSYM_H
#define MAGNETOMETERSENSORSYM_H

// QT Mobility Sensor API headers
#include <qsensorbackend.h>
#include <qmagnetometer.h>

// Internal Headers
#include "sensorbackendsym.h"

// Sensor client headers
// Magnetometer Sensor specific header
#include <sensrvmagnetometersensor.h>

QTM_USE_NAMESPACE

class CMagnetometerSensorSym: public CSensorBackendSym
    {
public:
    /**
     * Factory function, this is used to create the magnetometer sensor object
     * @return CMagnetometerSensorSym if successful, leaves on failure
     */
    static CMagnetometerSensorSym* NewL(QSensor *sensor);
    
    /**
     * Destructor
     * Closes the backend resources
     */
    ~CMagnetometerSensorSym();
    
    /*
     * Used to retrieve the current calibration level
     * iCalibrationLevel is automatically updated whenever there is a change
     * in calibration level
     */
    qreal GetCalibrationLevel();
    
    /**
     * start is overridden to allow retrieving initial calibration property before
     * and to set the required value type flags
     */
    void start();
    
private:
    /**
     * Default constructor
     */
    CMagnetometerSensorSym(QSensor *sensor);
    
    /*
     * RecvData is used to retrieve the sensor reading from sensor server
     * It is implemented here to handle magnetometer sensor specific
     * reading data and provides conversion and utility code
     */ 
    void RecvData(CSensrvChannel &aChannel);
    
    /**
     * HandlePropertyChange is called from backend, to indicate a change in property
     */
    void HandlePropertyChange(CSensrvChannel &aChannel, const TSensrvProperty &aChangedProperty);
    
    /**
     * Second phase constructor
     * Initialize the backend resources
     */
    void ConstructL();    
    
public:
    /**
     * Holds the id of the magnetometer
     */
    static char const * const id;
    
private:     
    QMagnetometerReading iReading;
    TSensrvMagnetometerAxisData iData;
    qreal iCalibrationLevel;
    bool iReturnGeoValues;
    TInt iScaleRange;
    };

#endif //MAGNETOMETERSENSORSYM_H