private void HighLightClosestPoint(int closestPointSeriesIndex,
int closestPointPointIndex,
PicesGPSDataPoint closestPoint,
PicesSipperDeployment closestDeployment
)
{
TimeSpan adjGpsToAct = new TimeSpan(0, 0, 0);
if (closestDeployment != null)
{
adjGpsToAct = closestDeployment.SyncTimeStampActual - closestDeployment.SyncTimeStampGPS;
}
DateTime adjDateTime = closestPoint.GpsUtcTime.Add(adjGpsToAct);
if ((lastClosestSeriesIndex >= 0) && (lastClosestSeriesIndex < ProfileChart.Series.Count))
{
if ((lastClosestPointIndex >= 0) && (lastClosestPointIndex < ProfileChart.Series[lastClosestSeriesIndex].Points.Count))
{
Series s = ProfileChart.Series[lastClosestSeriesIndex];
DataPoint dp = s.Points[lastClosestPointIndex];
dp.Label = "";
dp.MarkerSize = s.MarkerSize;
dp.MarkerStyle = s.MarkerStyle;
}
}
lastClosestPoint = null;
lastClosestSeriesIndex = -1;
lastClosestPointIndex = -1;
if ((closestPointSeriesIndex >= 0) && (closestPointSeriesIndex < ProfileChart.Series.Count))
{
if ((closestPointPointIndex >= 0) && (closestPointPointIndex < ProfileChart.Series[closestPointSeriesIndex].Points.Count))
{
Series s = ProfileChart.Series[closestPointSeriesIndex];
DataPoint dp = s.Points[closestPointPointIndex];
dp.Label = adjDateTime.ToString("HH:mm");
dp.MarkerStyle = MarkerStyle.Diamond;
dp.MarkerSize = s.MarkerSize * 3;
lastClosestPoint = closestPoint;
lastClosestSeriesIndex = closestPointSeriesIndex;
lastClosestPointIndex = closestPointPointIndex;
}
}
} /* HighLightClosestPoint */
public PicesGPSDataPoint ClosestPoint(double longitude, double longTh,
double latitude, double latTh,
ref int closestPointIndex,
ref double closestPointSquareDist
)
{
PicesGPSDataPoint closestPoint = null;
closestPointSquareDist = double.MaxValue;
closestPointIndex = -1;
double longitudeMin = longitude - longTh;
double longitudeMax = longitude + longTh;
double latitudeMin = latitude - longTh;
double latitudeMax = latitude + longTh;
int index = 0;
foreach (PicesGPSDataPoint dp in data)
{
if ((dp.Longitude >= longitudeMin) && (dp.Longitude <= longitudeMax))
{
if ((dp.Latitude >= latitudeMin) && (dp.Latitude <= latitudeMax))
{
double deltaLatitude = (dp.Latitude - latitude) / latTh;
double deltaLongitude = (dp.Longitude - longitude) / longTh;
double squareDist = deltaLatitude * deltaLatitude + deltaLongitude * deltaLongitude;
if (squareDist < closestPointSquareDist)
{
closestPoint = dp;
closestPointSquareDist = squareDist;
closestPointIndex = index;
}
}
}
index++;
}
return(closestPoint);
} /* ClosestPoint */
} /* HighLightClosestPoint */
private void ProfileChart_MouseClick(object sender, MouseEventArgs e)
{
Point p = e.Location;
//MouseClickLocation.Text = p.X.ToString () + "," + p.Y.ToString ();
ChartArea ca = ProfileChart.ChartAreas[0];
double longitude = ca.AxisX.PixelPositionToValue((double)p.X);
double latitude = ca.AxisY.PixelPositionToValue((double)p.Y);
// Determine Threshold.
int thInPixels = 25;
double x = ca.AxisX.PixelPositionToValue((double)(p.X + thInPixels));
double degLongPerPixel = Math.Abs(x - longitude) / thInPixels;
double y = ca.AxisY.PixelPositionToValue((double)(p.Y + thInPixels));
double degLatPerPixel = Math.Abs(y - latitude) / thInPixels;
double longTH = degLongPerPixel * thInPixels;
double latTH = degLatPerPixel * thInPixels;
PicesGPSDataPoint closestPoint = null;
int closestPointIndex = -1;
int closestPointSeriesIndex = -1;
double closestPointDistSquare = double.MaxValue;
PicesSipperDeployment closestDeployment = null;
foreach (DataSeriesToPlot dstp in series)
{
if (dstp.WithInThreshold(longitude, longTH, latitude, latTH))
{
double distSquare = double.MaxValue;
int closestPointInSeriesIndex = -1;
PicesGPSDataPoint closestPointInSeries = dstp.ClosestPoint(longitude, longTH, latitude, latTH, ref closestPointInSeriesIndex, ref distSquare);
if (closestPointInSeries != null)
{
if (distSquare < closestPointDistSquare)
{
closestPointIndex = closestPointInSeriesIndex;
closestPointSeriesIndex = dstp.chartSeriesIndex;
closestPointDistSquare = distSquare;
closestPoint = closestPointInSeries;
closestDeployment = dstp.deployment;
}
}
}
}
if (closestPoint != null)
{
HighLightClosestPoint(closestPointSeriesIndex, closestPointIndex, closestPoint, closestDeployment);
String gpsStr = PicesMethods.LatitudeLongitudeToString(closestPoint.Latitude, closestPoint.Longitude);
CurGPSLocation.Text = gpsStr;
COGField.Text = closestPoint.CourseOverGround.ToString("##0.0") + " deg's";
SOGField.Text = closestPoint.SpeedOverGround.ToString("#0.0") + " kts";
if (closestDeployment != null)
{
DeploymentHighlighted.Text = closestDeployment.ShortDescription + "(" + closestDeployment.DateTimeStart.ToString("yyyy-MM-dd") + ")";
}
else
{
DeploymentHighlighted.Text = "Cruise";
}
}
}
