Steema Central

Posted: **Tue Oct 17, 2017 9:14 am**

Hello Steema team,

I'm using Steema's TeeChart.WPF.

The chart I'm implementing contains three Series from TeeChart.WPF.Styles.Line and TeeChart.WPF.Styles.Points.

For the points I make use of adding tooltip information by using

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C#
Steema.TeeChart.WPF.Tools.MarksTip MarksTip_Points_Values = new Steema.TeeChart.WPF.Tools.MarksTip(MainChart.Chart)
{
   Series = ChartPoints_Values
};

I'm adding values to the serie by using the overloaded function

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C#
ChartPoints_Values.Add((int) viewRowStation.Row["ID"], (double) viewRowValues.Row["Value"], string.Format("Tooltip information... {0}: {1} | {2}", value, value, value), PointColor);

where you may see the tooltip information is a more or less complex tupel.

But whenever a point is added, the tooltip text will be shown on the corresponding X-axis.
(see picture where "Station 9" is getting overlayed from information)

: overlay on the X-Axis with information from tooltip; Unbenannt.PNG (11.37 KiB) Viewed 8017 times

How can I prevent the tooltips from being shown on an axis?

Additional curiosity I cannot resolve is seen in the two more pictures, attached.
Zoomed into the (same) chart - there are no tooltip information over the axis labels.
The same chart moved a bit to the right with panning, so the third point comes into the visible chart area - voilá tooltip information over the axis label.

Thank you.
Best, Jens

Posted: **Tue Oct 17, 2017 3:11 pm**

Hello Jens,

I'm having difficulty reproducing this one here (in a straight WPF app). I'm trying to do so with code such as the following:

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    Points series;
    Random rnd = new Random();

    private void InitializeChart()
    {
      series = new Points(tChart1.Chart);

      for (int i = 0; i < 10; i++)
      {
        double val = rnd.Next(0, 500);
        series.Add(i, val, i.ToString());
        //series.Add(i, val);
      }

      tChart1.Axes.Bottom.Labels.Angle = 90;
      MarksTip tool = new MarksTip(tChart1.Chart);
      tool.Style = MarksStyles.LabelValue;
      tool.Series = series;
      tChart1.Panel.MarginBottom = 20;
      tChart1.MouseMove += TChart1_MouseMove;
    }

    private double oldY = -1;
    private void TChart1_MouseMove(object sender, MouseEventArgs e)
    {
      int index = series.Clicked(e.GetPosition(tChart1));

      if(index > -1)
      {
        double x = series.XValues[index];
        double y = series.YValues[index];

        if(oldY != y)
        {
          series.Add(x, y, "this is a label");
          oldY = y;
        }
      }
    }

however, using neither of the series.Add() lines can I reproduce your problem (in this case adding in new points when mouse-overing old ones). Could you please modify the above code in some way so I can reproduce your problem here?

Posted: **Wed Oct 18, 2017 7:55 am**

Hello Christopher,

Thank you for diving into the problem.
Occasionally, since implementing your hint from topic "Displaying every label on X-Axis" the effect is not longer available.

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foreach (DataRowView viewRowStation in viewStationTable)
//Create labels for stations on X_Axis
{
   Steema.TeeChart.WPF.AxisLabelItem item = MainChart.Axes.Bottom.Labels.Items.Add((int) viewRowStation.Row["StationID"], (string) viewRowStation.Row["StationName"]);
}

Probably there were a difficult mix of series, points, marks and lables TeeChart had to calculate for the X-axis labeling. With a manually added set of labels the calculation may freed up from this.
So, no need for further investigation here.

Yours, Jens

Steema Central

Preventing tooltip data from being added to the axis

Preventing tooltip data from being added to the axis

Re: Preventing tooltip data from being added to the axis

Re: Preventing tooltip data from being added to the axis