internal WpfAccelerometer3D(Windows7.Sensors.Sensors.Motion.Accelerometer3D sensor) : base(sensor)
{
_accelerometer = sensor as Accelerometer3D;
if (_accelerometer == null)
{
throw new ArgumentException("sensor must be of Accelerometer3D type");
}
}
/// <summary>
/// Called when an accelerometer sensor is removed.
/// </summary>
/// <param name="sensorID"></param>
public void OnLeave(Sensor sensor, Guid sensorID)
{
if (sensor.SensorID == _sensor.SensorID && sensor.SensorID != Guid.Empty)
{
_sensor = null;
// attempt to find another sensor, if possible
Initialize();
}
}
/// <summary>
/// Set the report interval of the sensor to desired values.
/// </summary>
/// <param name="sensor">The sensor on which to set the values.</param>
private void SetupSensorProperties(Sensor sensor)
{
Accelerometer3D a3dSensor = (Accelerometer3D)sensor;
a3dSensor.ReportInterval = DesiredReportInterval;
if (a3dSensor.ReportInterval != DesiredReportInterval)
{
Debug.WriteLine("Error setting report interval. The desired value of " + DesiredReportInterval +
" could not be set. The current report interval is: " + a3dSensor.ReportInterval);
}
}
void DataReport_Changed(Sensor sender, EventArgs e)
{
// The data report update comes in on a non-UI thread.
// Whip up an anonymous delegate to handle the UI update.
BeginInvoke(new MethodInvoker(delegate
{
Accelerometer3D accel = sender as Accelerometer3D;
accelX.Acceleration = accel.CurrentAcceleration[AccelerationAxis.XAxis];
accelY.Acceleration = accel.CurrentAcceleration[AccelerationAxis.YAxis];
accelZ.Acceleration = accel.CurrentAcceleration[AccelerationAxis.ZAxis];
}));
}
private void HookUpAccelerometer()
{
try
{
SensorList <Accelerometer3D> sl = SensorManager.GetSensorsByTypeId <Accelerometer3D>( );
if (sl.Count > 0)
{
Accelerometer3D accel = sl[0];
accel.AutoUpdateDataReport = true;
accel.DataReportChanged += new DataReportChangedEventHandler(DataReport_Changed);
}
availabilityLabel.Text = "Accelerometers available = " + sl.Count;
}
catch (SensorPlatformException)
{
// This exception will also be hit in the Shown message handler.
}
}
/// <summary>
/// Called when any new sensor is attached to the system.
/// </summary>
public void OnSensorEnter(Sensor pSensor, SensorState state)
{
// The sensor paramater should not be null
System.Diagnostics.Debug.Assert(pSensor != null);
// If we are currently using a sensor we don't want to stop using it and
// use a new one so we only use a new sensor if we don't have one already.
if (_sensor == null)
{
Guid sensorType = Guid.Empty;
try
{
sensorType = pSensor.TypeID;
}
catch (COMException ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
if (sensorType == SensorType)
{
_sensor = (Accelerometer3D)pSensor;
try
{
pSensor.DataUpdated += new SensorDataUpdatedEventHandler(OnDataUpdated);
pSensor.EventReceived += new SensorEventHandler(OnEvent);
pSensor.SensorLeave += new SensorLeaveEventHandler(OnLeave);
pSensor.StateChanged += new SensorStateChangedEventHandler(OnStateChanged);
}
catch (COMException ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
state = pSensor.State;
if (state == SensorState.Ready)
{
SetupSensorProperties(pSensor);
SensorDataReport data = null;
try
{
data = pSensor.GetDataReport();
}
catch (COMException ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
if (data != null)
{
OnDataUpdated(pSensor, data);
}
}
else if (state == SensorState.AccessDenied)
{
if (RequestSensorAccess(pSensor))
{
SetupSensorProperties(pSensor);
}
}
}
}
}