Steema Central

Code: Select all

      Steema.TeeChart.Tools.Annotation tAnnot = new Annotation(chart);
      tChart1.Tools.Add(tAnnot);
      tAnnot.Text = "Sample";
      tAnnot.Shape.Transparent = true;
      tAnnot.Shape.Font.Size = 25;

      tAnnot.Shape.CustomPosition = true;
      tChart1.Draw();

      tAnnot.Shape.Left = donut1.CircleXCenter - tAnnot.Bounds.Width / 2;
      tAnnot.Shape.Top = donut1.CircleYCenter - tAnnot.Bounds.Height / 2;

      return param;

Code: Select all

    

//add event
donut1.GetSeriesMark += new Steema.TeeChart.Styles.Series.GetSeriesMarkEventHandler(donut1_GetSeriesMark);

private void donut1_GetSeriesMark(Series series, GetSeriesMarkEventArgs e)
    {
      if (e.ValueIndex == 3)   //add your criteria, here 4th point
        series.Marks.Font.Color = Color.White;
      else
        series.Marks.Font.Color = Color.Black;

    }

Code: Select all

donut.Marks.Visible = false;

//use Chart’s AfterDraw event
    private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
    {
      Steema.TeeChart.Styles.Donut dnt = (Steema.TeeChart.Styles.Donut)tChart1[0];

      donut.Marks.Visible = false;

      for (int i=0; i < dnt.Count; i++)
      {
        //use these integers for plot coords
        int startxx;
        int startyy;
        int endxx;
        int endyy;

        //outside permiter halfway on each point
        dnt.AngleToPos(dnt.Angles[i].MidAngle, dnt.XRadius, dnt.YRadius, out startxx, out startyy);

        //get halfway as fraction, from donut hole to exterior
        double halfwayloc = 1.0-(1.0 - (dnt.DonutPercent / 100.0)) / 2.0;   

        //get centre location for each Mark
        dnt.AngleToPos(dnt.Angles[i].MidAngle, dnt.XRadius * halfwayloc, dnt.YRadius * halfwayloc, out endxx, out endyy);

        //setup Font
        g.Font.Size = 14;
        g.Font.Name = "Microsoft Sans Serif";

        //Get Mark text
        string myText = dnt.ValueMarkText(i);

        //output Text
        g.TextOut(endxx - (int)(g.TextWidth(myText)/2), endyy - (g.FontHeight/2), dnt.ValueMarkText(i));
      }
    }