protected void DrawCircle(Graphics canvas, ICloudLayouter layouter) { var centerPoint = layouter.GetCloudCenter(); var radius = (int)Math.Ceiling(CalculateСircumcircleRadius(layouter.GetCurrentLayout(), centerPoint)); canvas.DrawEllipse(new Pen(Color.ForestGreen, 2), centerPoint.X - radius, centerPoint.Y - radius, 2 * radius, 2 * radius); }