Point Line Chart Tooltip

[Felix]

Hello Pasi,

how can I implement a tooltip at Point Line Chart?
When I take the mouse to a point, I want to view information from this point.

In a IntensityGridSeries I could use the Event "MouseTraceCellChanged".

PointLineChart.PNG (13.95 KiB) Viewed 7886 times

[ArctionPasi]

Please follow the "Scatter, point tracking" or "Cursor tracking" example.

[Felix]

Hello Pasi,

this works fine, but I want to get a value only when I am on the point.

Code: Select all

private void MouseMove(object sender, MouseEventArgs e)
{
	foreach (var pointLine in chart.ViewXY.PointLineSeries)
	{
		int iNearestIndex;
		double dXValue, dYValue;

		if (pointLine.SolveNearestDataPointByCoord(e.X, e.Y, out dXValue, out dYValue, out iNearestIndex))
		{
			newSelectedTestPoint = pointLine.Points[iNearestIndex].Tag as TestPoint;

			SetToolTip(chart, newSelectedTestPoint);
			
			break;
		}
	}
}

PointLineChart.PNG (15.94 KiB) Viewed 7880 times

[ArctionPasi]

How about setting a SeriesEventMarkers to positions of the points? In marker's MouseOverOn event, you'll get info of which marker was selected.