Pie Chart Size

[MikeTheLad]

My Pie Chart gets smaller as the data qty increases, ie a pie with 2 values, one of 4 and one 3, this is correct size. Another pie with the same size but has 2 values one, 3000 and one of 6000 and the pie is very small. The chart size in both cases is Width="508px" Height="221px"

[Narcís]

Hi MikeTheLad,

This is because the legend strings are longer and this takes space from the rest of the chart area. You can solve this by making the legend not visible or forcing the ValueFormat having 3 fix decimal digits:

Code: Select all

      pie1.Add(4);
      pie1.Add(3);
      pie1.ValueFormat = "#,##0.000";

      pie2.Add(2000);
      pie2.Add(3000);

[MikeTheLad]

Thanks, sorted this. On the legend I would like this to show a £ before the number is this possible?

[Narcís]

Hi MikeTheLad,

Yes, you can achieve that using the GetLegendText event adding the symbol to the legend text string.

[MikeTheLad]

Understand what you are saying, I have created the event as per tuturial 5 but when I build the project I get,

the type name 'GetLegendTextEventArgs' does not exist in the type 'Steema.TeeChart.TChart'

when I type Steema.TeeChart.TChart. in the event on the list of available command GetLegendText is not there.

[Narcís]

Hi MikeTheLad,

You can automatically create the even at TeeChart's event section in the property window or at run-time like this:

Code: Select all

    private void Form1_Load(object sender, EventArgs e)
    {
      candle1.FillSampleValues();

      tChart1.GetLegendText += new Steema.TeeChart.GetLegendTextEventHandler(tChart1_GetLegendText);
    }

    void tChart1_GetLegendText(object sender, Steema.TeeChart.GetLegendTextEventArgs e)
    {
      e.Text = "£" + e.Text;
    }

[MikeTheLad]

Is it possible to position the legend at the bottom of the pie, rather than the right.

[Narcís]

Hi MikeTheLad,

Yes, this is possible. You can do that using the chart editor at design-time or at run-time using:

Code: Select all

            tChart1.Legend.Alignment   = Steema.TeeChart.LegendAlignments.Bottom;

[MikeTheLad]

this has moved the legend to bottom, however the 2 lines of the legend are now side by side, whereas when on the right they we two lines on top of each other. Is it possible to have the two lines on top of each other on legend at the bottom.

[Narcís]

Hi MikeTheLad,

Ok, then you can use legend's custom position:

Code: Select all

      tChart1.Legend.CustomPosition = true;
      tChart1.Legend.Top = tChart1.Height - 50;
      tChart1.Legend.Left = tChart1.Width / 2;

      tChart1.Panel.MarginBottom = 15;