private async void OnPanToUserLocationWhenLocationChanged(object sender, Esri.ArcGISRuntime.Location.Location e)
{
if (_mapView.LocationDisplay.MapLocation.X != 0.0 || _mapView.LocationDisplay.MapLocation.Y != 0.0)
{
_mapView.LocationDisplay.LocationChanged -= OnPanToUserLocationWhenLocationChanged;
await PanToUserLocation();
}
}
protected virtual void OnMessageReceived(object sender, NmeaParser.NmeaMessageReceivedEventArgs args)
{
const double knotsToMeterPerSecond = 0.5144;
try
{
double?latitude = null;
double?longitude = null;
switch (args.Message)
{
case NmeaParser.Messages.Gga gga:
TrackedSatelliteCount = gga.NumberOfSatellites; // Satellites being tracked
// gga.Hdop // Horizontal dilution of position
if (gga.Quality != NmeaParser.Messages.Gga.FixQuality.Invalid)
{
latitude = gga.Latitude;
longitude = gga.Longitude;
}
break;
case NmeaParser.Messages.Gsa gsa:
TrackedSatelliteCount = (gsa.SatelliteIDs?.Count() ?? 0); // Satellite IDs used for fix
// gsa.Fix // None; 2D; or, 3D
// gsa.Pdop
// gsa.Hdop
// gsa.Vdop
break;
case NmeaParser.Messages.Rma rma:
if (rma.Status != NmeaParser.Messages.Rma.PositioningStatus.Invalid)
{
latitude = rma.Latitude;
longitude = rma.Longitude;
if (!double.IsNaN(rma.Course))
{
Course = rma.Course;
}
Velocity = (rma.Speed * knotsToMeterPerSecond);
}
break;
case NmeaParser.Messages.Rmc rmc:
latitude = rmc.Latitude;
longitude = rmc.Longitude;
if (!double.IsNaN(rmc.Course))
{
Course = rmc.Course;
}
Velocity = (rmc.Speed * knotsToMeterPerSecond);
break;
}
var validLatitude = ((latitude != null) && (!double.IsNaN(latitude.Value)));
var validLongitude = ((longitude != null) && (!double.IsNaN(longitude.Value)));
if (validLatitude && validLongitude)
{
var mapPoint = new MapPoint(longitude.Value, latitude.Value, SpatialReferences.Wgs84);
var location = new Esri.ArcGISRuntime.Location.Location(mapPoint, 2, Velocity, Course, false);
UpdateLocation(location);
}
}
catch (Exception ex)
{
}
}
private void InputLocationChanged(object sender, Esri.ArcGISRuntime.Location.Location e)
{
// Update the tracker location with the new location from the source (simulation or GPS).
_routeTracker.TrackLocationAsync(e);
}