Line chart zooming false representation

[Felix]

Hello Pasi,

when zooming I get a false representation.

Without zoom.

PointLineChart1.PNG (23.16 KiB) Viewed 11482 times

With zoom.

PointLineChart2.PNG (20.48 KiB) Viewed 11482 times

[ArctionPasi]

How have you composed this chart? With a single PointLineSeries or several PointLineSeries? Single approach is wrong, btw. If you could post some code or a VS project, that would help a in helping more.

[Felix]

Hello Pasi,

Yes it is one Point Line Series.
Since several objects are to be displayed with N points.

PointLineChart3.PNG (22.79 KiB) Viewed 11478 times

Code: Select all

private IEnumerable<PointLineSeries> CreateChart(LightningChartUltimate lightningChart, IList<Mypoint> data, XAxisTypes xAxisType)
{
	if (data == null)
		return null;

	if (data.Count == 0)
		return null;

	PointLineSeries.Clear();

	var points = new List<SeriesPoint>();
	var path = data[0].path;
	
	for (var i = 0; i < data.Count; i++)
	{
		var point = data[i];
		var nextpoint = GetNextpoint(data, i);

		if (xAxisType.Equals(XAxisTypes.PointNumber))
			points.Add(new SeriesPoint(Convert.ToInt32(point.pointID), GetValueFrompoint(point), point));
		else
			points.Add(new SeriesPoint(point.XRelativ, GetValueFrompoint(point), point));

		if (nextpoint == null || !path.Equals(nextpoint.Path))
		{
			var pointLineSeries = new PointLineSeries(lightningChart.ViewXY, lightningChart.ViewXY.XAxes[0], lightningChart.ViewXY.YAxes[0])
			{
				PointsVisible = false,
				Title = { Text = GetLegendName(data, point, false) },
				Points = points.ToArray(),
				MouseHighlight = MouseOverHighlight.None,
				MouseInteraction = false
			};

			pointLineSeries.Points = points.ToArray();
			pointLineSeries.PointStyle = GetPointShapeStyle(pointLineSeries.PointStyle);
			pointLineSeries.LineStyle.Color = (point.color == Color.Transparent) ? Color.Gray : point.color;

			// ToolTip
			foreach (var point in points)
			{
				var marker = new SeriesEventMarker(pointLineSeries)
				{
					XValue = point.X,
					YValue = point.Y,
					VerticalPosition = SeriesEventMarkerVerticalPosition.AtYValue,
					HorizontalPosition = SeriesEventMarkerHorizontalPosition.AtXValue,
					Tag = point.Tag,
					MouseHighlight = MouseOverHighlight.None,
					MoveByMouse = false,
					Symbol = pointLineSeries.PointStyle,                            
					Label = { Visible = false }
				};

				pointLineSeries.SeriesEventMarkers.Add(marker);
			}

			PointLineSeries.Add(pointLineSeries);

			if (nextpoint != null)
				path = nextpoint.path;

			points.Clear();
		}
	}

	return PointLineSeries;
}

[ArctionPasi]

In a PointLineSeries, the data must follow the rule x[i+1] >= x.

Use several PointLineSeries instead.

[Felix]

How can I fill the points according to coordinates?

I have several objects with n-number of points, how can I then each object in the legend show and hide?

How many points can I add to a Point Line Series?

How do I program this example?

PointLineChart3.PNG (22.79 KiB) Viewed 11476 times

How many Points LineSeries would it be?

The legend should include only the 3 items!

[ArctionPasi]

You'll need one PointLineSeries for each continuous line strip, travelling from left to right.

You can prevent the PointLineSeries from listing itself in the legend by setting pointLineSeries.Title.ShowInLegendBox = false.

You can set over 1 M points per series.