Steema Central

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[
	{year: 2021, wid: 'A',total: 10},
	{year: 2021, wid: 'B',total: 20},
	{year: 2021, wid: 'C',total: 20},
	{year: 2021, wid: 'D',total: 20},
	{year: 2022, wid: 'E',total: 10},
	{year: 2022, wid: 'F',total: 10},
	{year: 2022, wid: 'A',total: 20},
	{year: 2023, wid: 'S',total: 10},
	{year: 2023, wid: 'T',total: 20},
	{year: 2023, wid: 'H',total: 20},
	{year: 2023, wid: 'N',total: 10}
]

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int[] idx = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int[] year = { 2021, 2021, 2021, 2021, 2022, 2022, 2022, 2023, 2023, 2023, 2023 };
string[] label = { "A", "B", "C", "D", "E", "F", "A", "S", "T", "H", "N" };
double[] total = { 10, 20, 20, 20, 10, 10, 20, 10, 20, 20, 10 };

private void Form1_Load(object sender, EventArgs e)
{
    //note an index (idx here) is not required for this add overload as it is automatically added, but it 
    //helps to include it for clarity/understanding.
    for (int i = 0; i < 11; i++)
    {
        points1.Add(total[i], label[i]);

        //or
        //points1.Add(idx[i], total[i], label[i]);
    }

    tChart1.Axes.Left.SetMinMax(0, 50);
}

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private void tChart1_GetAxisLabel(object sender, Steema.TeeChart.GetAxisLabelEventArgs e)
{
    if (sender == tChart1.Axes.Bottom)
    {
        if (e.ValueIndex != -1)
            e.LabelText = e.LabelText + "\n" + year[e.ValueIndex].ToString();
    }
}

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int lastYear = -1;

private void tChart1_GetAxisLabel(object sender, Steema.TeeChart.GetAxisLabelEventArgs e)
{
    if (sender == tChart1.Axes.Bottom)
    {
        if (e.ValueIndex != -1)
            if (lastYear != year[e.ValueIndex])
            {
                e.LabelText = e.LabelText + "\n      " + year[e.ValueIndex].ToString();
                lastYear = year[e.ValueIndex];
            }
    }
}

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/*x location:*/ tChart1.Axes.Bottom.CalcXPosValue(yourPointvalue)
/*y location:*/ tChart1.Axes.Left.CalcYPosValue(tChart1.Axes.Left.Minimum)  
                     //gets bottom Axis location to which you can add the distance you require
/*or....*/
tChart1.Axes.Bottom.Position

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private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g) { 
        Point s = new Point(tChart1.Axes.Left.Position, tChart1.Axes.Top.Position); 
        Point e = new Point(tChart1.Axes.Right.Position, tChart1.Axes.Bottom.Position); 
        g.MoveTo(s); 
        g.LineTo(e,0); 
} 

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private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g) { 
        string text = "My Text"; 
        Size s = new Size(150, 50); 
        Point p = new Point(g.ChartXCenter - (s.Width/2), g.ChartYCenter - (s.Height/2)); 
        Rectangle r = new Rectangle(p,s); 
        g.Pen.Color = Color.Blue; 
        g.Rectangle(r); 
 
        g.TextOut(Convert.ToInt32(g.ChartXCenter - (g.TextWidth(text)/2)), Convert.ToInt32(g.ChartYCenter - (g.TextHeight(text)/2)), text); 
}

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tChart1.Panel.MarginUnits = PanelMarginUnits.Pixels;
tChart1.Panel.MarginBottom = 80;

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private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g) { 
        Point s = new Point(tChart1.Axes.Left.Position, tChart1.Axes.Top.Position); 
        Point e = new Point(tChart1.Axes.Right.Position, tChart1.Axes.Bottom.Position); 
        g.MoveTo(s); 
        g.LineTo(e,0); 
} 

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Point s = new Point(Axes.Bottom.CalcXPosValue(0), Axes.Bottom.CalcYPosValue(12));
Point e = new Point(Axes.Bottom.CalcXPosValue(5), Axes.Bottom.CalcYPosValue(20)); 

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private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
{
    Point p5 = new Point(points1.CalcXPos(0), points1.CalcYPos(0));
    Point p15 = new Point(points1.CalcXPos(6), points1.CalcYPos(6));
    g.Pen.DashCap = System.Drawing.Drawing2D.DashCap.Triangle;
    g.Pen.EndCap = System.Drawing.Drawing2D.LineCap.DiamondAnchor;
    g.Pen.Style = System.Drawing.Drawing2D.DashStyle.DashDotDot;
    g.Pen.Transparency = 70;
    g.Pen.Width = 3;
    g.Pen.Color = Color.BlueViolet;
    g.MoveTo(p5);
    g.LineTo(p15, 0);
}

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  //declare var for max label width (length)
  double maxLabelWidth = 0;

  //then in Form_load or data refresh set:
  maxLabelWidth = tChart1.Axes.Bottom.MaxLabelsWidth();

  //will use radians for angle calcs
  public double ConvertToRadians(double angle)
  {
    return (Math.PI / 180) * angle;
  }

  //this example outputs test text in OnAfterDraw
  private void tChart1_AfterDraw(object sender, Steema.TeeChart.Drawing.Graphics3D g)
  {
    double hyp = maxLabelWidth;
    
    //some simple trig:
    //sin(@) = opp/hyp
    //yDisp = opp  therefore  = hyp * sin(@) 

    double angleRad = ConvertToRadians(tChart1.Axes.Bottom.Labels.Angle);
    double yDisp = tChart1.Axes.Bottom.Labels.Height; //minimum

    if ((tChart1.Axes.Bottom.Labels.Angle >= 0) && (tChart1.Axes.Bottom.Labels.Angle < 180))
      yDisp = yDisp + Math.Sin(angleRad) * maxLabelWidth;
    else
      yDisp = yDisp + Math.Sin(angleRad) * maxLabelWidth * -1;

    g.TextOut(10, (int)(tChart1.Axes.Bottom.Position + yDisp), "test label");

  }