/// <summary>
/// Creates a data report instance appropirate for the sensor.
/// </summary>
/// <param name="report">Underlying data report COM object.</param>
/// <param name="sensor">Sensor COM object.</param>
/// <returns></returns>
internal SensorDataReport GetDataReport(ISensorDataReport report, ISensor sensor)
{
SensorDataReport sdr = CreateReport();
sdr.InitializeReport(report, this);
return(sdr);
}
internal static SensorReport FromNativeReport(Sensor originator, ISensorDataReport iReport)
{
SystemTime systemTimeStamp = new SystemTime();
try
{
iReport.GetTimestamp(out systemTimeStamp);
}
catch (System.Runtime.InteropServices.COMException ex)
{
System.Diagnostics.Trace.WriteLine(ex);
return(null);
}
FILETIME ftTimeStamp = new FILETIME();
SensorNativeMethods.SystemTimeToFileTime(ref systemTimeStamp, out ftTimeStamp);
long lTimeStamp = (((long)ftTimeStamp.dwHighDateTime) << 32) + (long)ftTimeStamp.dwLowDateTime;
DateTime timeStamp = DateTime.FromFileTime(lTimeStamp);
SensorReport sensorReport = new SensorReport();
sensorReport.originator = originator;
sensorReport.timeStamp = timeStamp;
sensorReport.sensorData = SensorData.FromNativeReport(originator.internalObject, iReport);
return(sensorReport);
}
/// <summary>
/// Synchronously retrieves a data report from the sensor.
/// </summary>
/// <returns>Data report.</returns>
public SensorDataReport GetDataReport()
{
ISensorDataReport iReport = null;
_iSensor.GetData(out iReport);
return(GetDataReport(iReport, _iSensor));
}
void ISensorEvents.OnDataUpdated(ISensor sensor, ISensorDataReport newData)
{
this.dataReport = SensorReport.FromNativeReport(this, newData);
if (DataReportChanged != null)
{
DataReportChanged.Invoke(this, EventArgs.Empty);
}
}
/// <summary>
/// Handler for any event. Fires the <see cref="EventReceived"/> event.
/// </summary>
/// <param name="sensor">COM sensor object for which this event was fired.</param>
/// <param name="eventID">Event GUID.</param>
/// <param name="newData">COM data report object.</param>
void ISensorEvents.OnEvent(ISensor sensor, Guid eventID, ISensorDataReport newData)
{
if (EventReceived != null)
{
SensorDataReport sdr = GetDataReport(newData, sensor);
EventReceived(this, eventID, sdr);
}
}
/// <summary>
/// Handler of the data updated event. Fires the <see cref="DataUpdated"/> event.
/// Creates an appropriate data report object.
/// </summary>
/// <param name="sensor">COM sensor object for which this event was fired.</param>
/// <param name="newData">COM data report object.</param>
void ISensorEvents.OnDataUpdated(ISensor sensor, ISensorDataReport newData)
{
_lastReport = newData;
if (DataUpdated != null)
{
SensorDataReport sdr = GetDataReport(newData, sensor);
DataUpdated(this, sdr);
}
}
/// <summary>
/// Retrieves the last data report asynchronously received from the sensor. Otherwise, returns null.
/// </summary>
/// <returns>Data report or null.</returns>
public SensorDataReport GetLastAsyncDataReport()
{
ISensorDataReport lastRep = _lastReport;
if (lastRep == null)
{
return(null);
}
return(GetDataReport(lastRep, _iSensor));
}
internal static SensorData FromNativeReport(ISensor iSensor, ISensorDataReport iReport)
{
SensorData data = new SensorData( );
IPortableDeviceKeyCollection keyCollection;
IPortableDeviceValues valuesCollection;
iSensor.GetSupportedDataFields(out keyCollection);
iReport.GetSensorValues(keyCollection, out valuesCollection);
uint items = 0;
keyCollection.GetCount(out items);
for (uint index = 0; index < items; index++)
{
PropertyKey key;
PropVariant propValue;
keyCollection.GetAt(index, out key);
valuesCollection.GetValue(ref key, out propValue);
try
{
if (data.ContainsKey(key.FormatId))
{
data[key.FormatId].Add(propValue.Value);
}
else
{
data.Add(key.FormatId, new List <object> {
propValue.Value
});
}
}
finally
{
propValue.Clear( );
}
}
if (keyCollection != null)
{
Marshal.ReleaseComObject(keyCollection);
keyCollection = null;
}
if (valuesCollection != null)
{
Marshal.ReleaseComObject(valuesCollection);
valuesCollection = null;
}
return(data);
}
/// <summary>
/// Handler of an event indicating cesation of sensor availability.
/// </summary>
/// <param name="sensorID">Sensor's instance GUID.</param>
void ISensorEvents.OnLeave(Guid sensorID)
{
_iSensor = null;
_lastReport = null;
if (SensorLeave != null)
{
SensorLeave(this, sensorID);
}
lock (_instances)
{
_instances.Remove(this);
}
}
internal static SensorReport FromNativeReport( Sensor originator, ISensorDataReport iReport )
{
SYSTEMTIME systemTimeStamp = new SYSTEMTIME( );
iReport.GetTimestamp( out systemTimeStamp );
FILETIME ftTimeStamp = new FILETIME( );
SensorNativeMethods.SystemTimeToFileTime( ref systemTimeStamp, out ftTimeStamp );
long lTimeStamp = (((long)ftTimeStamp.dwHighDateTime) << 32) + (long)ftTimeStamp.dwLowDateTime;
DateTime timeStamp = DateTime.FromFileTime( lTimeStamp );
SensorReport sensorReport = new SensorReport( );
sensorReport.originator = originator;
sensorReport.timeStamp = timeStamp;
sensorReport.sensorData = SensorData.FromNativeReport( originator.internalObject, iReport );
return sensorReport;
}
internal static SensorReport FromNativeReport(Sensor originator, ISensorDataReport iReport)
{
SystemTime systemTimeStamp = new SystemTime();
iReport.GetTimestamp(out systemTimeStamp);
FILETIME ftTimeStamp = new FILETIME();
SensorNativeMethods.SystemTimeToFileTime(ref systemTimeStamp, out ftTimeStamp);
long lTimeStamp = (((long)ftTimeStamp.dwHighDateTime) << 32) + (long)ftTimeStamp.dwLowDateTime;
DateTime timeStamp = DateTime.FromFileTime(lTimeStamp);
SensorReport sensorReport = new SensorReport();
sensorReport.originator = originator;
sensorReport.timeStamp = timeStamp;
sensorReport.sensorData = SensorData.FromNativeReport(originator.internalObject, iReport);
return(sensorReport);
}
internal HRESULT InternalUpdateData()
{
ISensorDataReport iReport = null;
HRESULT hr = nativeISensor.GetData(out iReport);
if (hr == HRESULT.S_OK)
{
try
{
this.dataReport = SensorReport.FromNativeReport(this, iReport);
if (DataReportChanged != null)
{
DataReportChanged.Invoke(this, EventArgs.Empty);
}
}
finally
{
Marshal.ReleaseComObject(iReport);
}
}
return(hr);
}
void ISensorEvents.OnEvent(ISensor sensor, Guid eventID, ISensorDataReport newData)
{
}
internal void InitializeReport(ISensorDataReport report, Sensor sensor)
{
_iSensorReport = report;
_sensor = sensor;
Initialize();
}
