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Ensure no repeated events are raised. Only Fixtime on location updates

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This commit is contained in:
Morten Nielsen 2020-07-31 14:01:52 -07:00
parent 967a54f41f
commit f83600de07
2 changed files with 26 additions and 6 deletions
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6
src/NmeaParser/Gnss/GnssMonitor.cs
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@ -65,8 +65,6 @@ namespace NmeaParser.Gnss
m_supportGNMessages = true; // Support for GN* messages detected
else if (m_supportGNMessages && message.TalkerId != NmeaParser.Talker.GlobalNavigationSatelliteSystem)
return; // If device supports combined GN* messages, ignore non-GN messages
if (message is ITimestampedMessage ts)
FixTime = ts.Timestamp;
if (message is NmeaParser.Messages.Garmin.Pgrme rme)
{
@ -88,6 +86,7 @@ namespace NmeaParser.Gnss
{
lat = Rmc.Latitude;
lon = Rmc.Longitude;
FixTime = Rmc.FixTime.TimeOfDay;
isNewFix = true;
}
else
@ -122,6 +121,7 @@ namespace NmeaParser.Gnss
{
lostFix = true;
}
FixTime = Gga.FixTime;
isNewFix = true;
}
else if (message is Gsa gsa)
@ -249,7 +249,7 @@ namespace NmeaParser.Gnss
/// <summary>
/// Gets the current fix time
/// </summary>
public TimeSpan FixTime { get; private set; }
public TimeSpan? FixTime { get; private set; }
/// <summary>
/// Gets a list of satellite vehicles in the sky

26
src/SampleApp.WinDesktop/NmeaLocationDataSource.cs
View file

@ -69,19 +69,39 @@ namespace SampleApp.WinDesktop
return Task.CompletedTask;
}
private Esri.ArcGISRuntime.Location.Location currentLocation;
private void OnLocationChanged(object sender, EventArgs e)
{
if (double.IsNaN(m_gnssMonitor.Longitude) || double.IsNaN(m_gnssMonitor.Latitude)) return;
if (!double.IsNaN(m_gnssMonitor.Course))
lastCourse = m_gnssMonitor.Course;
UpdateLocation(new Esri.ArcGISRuntime.Location.Location(
timestamp: null,
DateTimeOffset? timestamp = null;
if(m_gnssMonitor.FixTime.HasValue)
timestamp = new DateTimeOffset(DateTime.UtcNow.Date.Add(m_gnssMonitor.FixTime.Value));
var location = new Esri.ArcGISRuntime.Location.Location(
timestamp: timestamp,
position: !double.IsNaN(m_gnssMonitor.Altitude) ? new MapPoint(m_gnssMonitor.Longitude, m_gnssMonitor.Latitude, m_gnssMonitor.Altitude, wgs84_ellipsoidHeight) : new MapPoint(m_gnssMonitor.Longitude, m_gnssMonitor.Latitude, SpatialReferences.Wgs84),
horizontalAccuracy: m_gnssMonitor.HorizontalError,
verticalAccuracy: m_gnssMonitor.VerticalError,
velocity: double.IsNaN(m_gnssMonitor.Speed) ? 0 : m_gnssMonitor.Speed * 0.51444444,
course: lastCourse,
!m_gnssMonitor.IsFixValid));
!m_gnssMonitor.IsFixValid);
// Avoid raising additional location events if nothing changed
if (currentLocation == null ||
currentLocation.Position.X != location.Position.X ||
currentLocation.Position.Y != location.Position.Y ||
currentLocation.Position.Z != location.Position.Z ||
currentLocation.Course != location.Course ||
currentLocation.Velocity != location.Velocity ||
currentLocation.HorizontalAccuracy != location.HorizontalAccuracy ||
currentLocation.VerticalAccuracy != location.VerticalAccuracy ||
currentLocation.IsLastKnown != location.IsLastKnown ||
timestamp != location.Timestamp)
{
currentLocation = location;
UpdateLocation(currentLocation);
}
}
}
}