/// <summary>Draw graphics that float over the graph</summary>
private void OverlayOnPaint(object sender, GraphControl.OverlaysEventArgs args)
{
// Updated on every paint
var pt = args.G2C.TransformPoint(new PointF(5, 5), 1);
args.Gfx.DrawString("Point (5,5)", SystemFonts.DefaultFont, Brushes.DarkGreen, pt);
}
/// <summary>Embed graphics into the graph</summary>
private void OverlayOnRender(object sender, GraphControl.OverlaysEventArgs args)
{
// A 20 pixel radius circle at 5,5 on the graph
// Only updated when the graph is rendered
var pt = args.G2C.TransformPoint(new PointF(5, 5), 1);
args.Gfx.DrawEllipse(Pens.DarkGreen, pt.X - 20, pt.Y - 20, 40, 40);
}
