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    41 

    42 #ifndef MAGNETOMETERSENSORSYM_H

    43 #define MAGNETOMETERSENSORSYM_H

    44 

    45 // QT Mobility Sensor API headers

    46 #include <qsensorbackend.h>

    47 #include <qmagnetometer.h>

    48 

    49 // Internal Headers

    50 #include "sensorbackendsym.h"

    51 

    52 // Sensor client headers

    53 // Magnetometer Sensor specific header

    54 #include <sensrvmagnetometersensor.h>

    55 

    56 QTM_USE_NAMESPACE

    57 

    58 class CMagnetometerSensorSym: public CSensorBackendSym

    59     {

    60 public:

    61     /**

    62      * Factory function, this is used to create the magnetometer sensor object

    63      * @return CMagnetometerSensorSym if successful, leaves on failure

    64      */

    65     static CMagnetometerSensorSym* NewL(QSensor *sensor);

    66     

    67     /**

    68      * Destructor

    69      * Closes the backend resources

    70      */

    71     ~CMagnetometerSensorSym();

    72     

    73     /*

    74      * Used to retrieve the current calibration level

    75      * iCalibrationLevel is automatically updated whenever there is a change

    76      * in calibration level

    77      */

    78     qreal GetCalibrationLevel();

    79     

    80     /**

    81      * start is overridden to allow retrieving initial calibration property before

    82      * and to set the required value type flags

    83      */

    84     void start();

    85     

    86 private:

    87     /**

    88      * Default constructor

    89      */

    90     CMagnetometerSensorSym(QSensor *sensor);

    91     

    92     /*

    93      * RecvData is used to retrieve the sensor reading from sensor server

    94      * It is implemented here to handle magnetometer sensor specific

    95      * reading data and provides conversion and utility code

    96      */ 

    97     void RecvData(CSensrvChannel &aChannel);

    98     

    99     /**

   100      * HandlePropertyChange is called from backend, to indicate a change in property

   101      */

   102     void HandlePropertyChange(CSensrvChannel &aChannel, const TSensrvProperty &aChangedProperty);

   103     

   104     /**

   105      * Second phase constructor

   106      * Initialize the backend resources

   107      */

   108     void ConstructL();    

   109     

   110 public:

   111     /**

   112      * Holds the id of the magnetometer

   113      */

   114     static const char *id;

   115     

   116 private:     

   117     QMagnetometerReading iReading;

   118     TSensrvMagnetometerAxisData iData;

   119     qreal iCalibrationLevel;

   120     bool iReturnGeoValues;

   121     };

   122 

   123 #endif //MAGNETOMETERSENSORSYM_H