Steema Central

Posted: **Thu Aug 17, 2006 12:28 am**

Hi.

I'm trying to delete first point in highlow chart. but the highlow chart is displayed strange

line chart is good.

I used the following code to delete

Code: Select all

private void btnDelete_Click(object sender, System.EventArgs e)
{
	for (int index1 = 0; index1 < tChart1.Series.Count; index1++)
	{
		if (tChart1.Series.Count > 0)
		{
			tChart1.Series[index1].Delete(0);
			tChart1.Series[index1].RefreshSeries();
			tChart1.Series[index1].Repaint();
		}
	}

	tChart1.Refresh();
	tChart1.Update();
}

Thanks,

Posted: **Thu Aug 17, 2006 7:13 am**

Hello,

This seems to work ok with code similar to the following:

Code: Select all

    public Form1()
    {
      InitializeComponent();
      InitializeChart();
    }

    private void InitializeChart()
    {
      tChart1.Series.Add(new Steema.TeeChart.Styles.HighLow());
      tChart1.Series.Add(new Steema.TeeChart.Styles.Line());
      tChart1[0].FillSampleValues();
      tChart1[1].FillSampleValues();
    }

    private void button1_Click(object sender, EventArgs e)
    {
      for (int index1 = 0; index1 < tChart1.Series.Count; index1++)
      {
        if (tChart1.Series.Count > 0)
        {
          tChart1.Series[index1].Delete(0);
          tChart1.Series[index1].RefreshSeries();
          tChart1.Series[index1].Repaint();
        }
      }
      tChart1.Refresh();
      tChart1.Update(); 
    }

Could you please modify the above code and send it back to me so that I can reproduce the problem here?

Many thanks!!

Posted: **Thu Aug 17, 2006 11:07 am**

Thanks!
but I can't see correct data in my chart...

please see the following code :

Code: Select all


private void btnChart_Click(object sender, System.EventArgs e)
{
	chartUtil.ChartClear(tChart1);
	Line lineSeries = chartUtil.AddLineSeries(tChart1, "TEST", VerticalAxis.Left, Color.Blue, false, true);
	lineSeries.Add(lineSeries.Count, 0, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 1, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 2, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 3, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 4, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 4, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 3, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 2, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 1, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 0, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 1, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 2, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 3, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 4, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 5, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 4, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 3, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 2, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 1, "", lineSeries.Color);
	lineSeries.Add(lineSeries.Count, 0, "", lineSeries.Color);

	HighLow highLowSeries = chartUtil.AddHighLowSeries(tChart1, "SPEC", VerticalAxis.Left, Color.Green, false, false);
	for (int index1 = 0; index1 < lineSeries.Count; index1++)
	{
		highLowSeries.Add(lineSeries.XValues[index1], lineSeries.YValues[index1] - 0.5, lineSeries.YValues[index1] + 0.5, "", highLowSeries.Color);
	}

	highLowSeries.Pen.Visible = true; 
	highLowSeries.HighBrush.Visible = true; 
	highLowSeries.LowBrush.Visible = true; 
	highLowSeries.HighPen.Color = Color.Green; 
	highLowSeries.LowPen.Color = Color.Blue; 
	highLowSeries.ShowInLegend = false; 

	chartUtil.LegendInitialize(tChart1, LegendStyles.Series, LegendTextStyles.Plain, true);
	chartUtil.SetAxisMinMax(tChart1.Axes.Left, 30, 30);
	chartUtil.SetAxisLabel(tChart1.Axes.Left, AxisLabelStyle.Value);
	chartUtil.SetAxisLabel(tChart1.Axes.Bottom, AxisLabelStyle.Value);
}


private void btnDelete_Click(object sender, System.EventArgs e)
{
	for (int index1 = 0; index1 < tChart1.Series.Count; index1++)
	{
		if (tChart1.Series.Count > 0)
		{
			tChart1.Series[index1].Delete(0);
			tChart1.Series[index1].RefreshSeries();
			tChart1.Series[index1].Repaint();
		}
	}
	tChart1.Refresh();
	tChart1.Update();
}

Posted: **Thu Aug 17, 2006 2:16 pm**

Hello,

OK, I've been able to reproduce your problem here. It's an interesting defect, as it only seems to occur because of a specific characteristic of your data combined with the use of the Series.Delete() function. You can work around the problem by re-adding in your data, e.g.

Code: Select all

 public Form1()
    {
      InitializeComponent();
      InitializeArrays();
      InitializeChart();
    }

    private int[] xValues;
    private int[] yValues;
    private void InitializeArrays()
    {
      xValues = new int[31];
      yValues = new int[31];

      int length = 31;
      int val = 0;
      for (int i = 0; i < length; i++)
      {
        xValues[i] = i;
        val = i % 15;
        if (val > 6)
        {
          val = 15 - val;
        }
        if (val > 4)
        {
          val = 5;
        }
        yValues[i] = val;
      }
    }

    private Steema.TeeChart.Styles.HighLow highLowSeries;
    private Steema.TeeChart.Styles.Line lineSeries;
    private void InitializeChart()
    {
      tChart1.Aspect.View3D = false;
      lineSeries = new Steema.TeeChart.Styles.Line(tChart1.Chart);
      highLowSeries = new Steema.TeeChart.Styles.HighLow(tChart1.Chart);
      for (int index1 = 0; index1 < yValues.Length; index1++)
      {
        lineSeries.Add(xValues[index1], yValues[index1]);
        highLowSeries.Add(xValues[index1], yValues[index1] + 0.5, yValues[index1] - 0.5, "", highLowSeries.Color);
      }
    }

    private void button1_Click(object sender, EventArgs e)
    {
      highLowSeries.Clear();
      lineSeries.Clear();

      for (int index1 = 1; index1 < yValues.Length; index1++)
      {
        lineSeries.Add(xValues[index1], yValues[index1]);
        highLowSeries.Add(xValues[index1], yValues[index1] + 0.5, yValues[index1] - 0.5, "", highLowSeries.Color);
      }
    }

I have added this issue to our list of defects meaning that a fix to it will be considered for inclusion into our next maintenance release.

Posted: **Thu Aug 17, 2006 2:24 pm**

Hello,

In fact, a better work around is to use your original code and to replace the code in the button with:

Code: Select all

  private void button1_Click(object sender, EventArgs e)
    {
      for (int index1 = 0; index1 < tChart1.Series.Count; index1++)
      {
        if (tChart1.Series.Count > 0)
        {
          tChart1.Series[index1].Delete(0);
          if (tChart1.Series[index1] is Steema.TeeChart.Styles.HighLow)
          {
            (tChart1.Series[index1] as Steema.TeeChart.Styles.HighLow).LowValues.RemoveAt(0);
          }
        }
      }
    }

I've now fixed this for the upcoming maintenance release.

Posted: **Fri Aug 18, 2006 12:41 am**

Hi,

Thank you very much~

This seems to work ok with following:

Code: Select all

if (tChart1.Series[index1] is Steema.TeeChart.Styles.HighLow) 
{ 
	(tChart1.Series[index1] as Steema.TeeChart.Styles.HighLow).LowValues.RemoveAt(0); 
}

Steema Central

delete to highlow data

delete to highlow data