Trackball on selected series in UI for WinForms

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Trackball on selected series

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ChartView

This is a migrated thread and some comments may be shown as answers.

3 Answers, 1 is accepted

answered on 23 May 2019, 01:16 PM

Hi Josef,

You can use the TextNeeded event to change the default text. Here is an example that show how you can skip some series:

public RadForm1()

{

InitializeComponent();

var controler = new ChartTrackballController();

controler.TextNeeded += Controler_TextNeeded;

radChartView1.Controllers.Add(controler);

}

private void Controler_TextNeeded(object sender, TextNeededEventArgs e)

{

StringBuilder sb = new StringBuilder();

foreach (DataPointInfo point in e.Points)

{

if (point.Series == radChartView1.Series[0] || point.Series == radChartView1.Series[1])

{

continue;

}

var dataPoint = point.DataPoint as CategoricalDataPoint;

sb.AppendLine(point.Series.Name + " " + dataPoint.Value);

}

e.Text = sb.ToString();

}

If you are using straight lines for the limit series you can replace them with annotations: Grid line | UI for WinForms Documentation.

I hope this will be useful. Let me know if you have additional questions.

Regards,
Dimitar
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