public EllipseFigure()
        {
            points = new List <Point>();

            painter    = new EllipsePainter();
            calculator = new EllipseCalculator();
            checker    = new EllipseChecker();
            mover      = new EllipseMover();
        }
        public EllipseFigure(Color color, int width)
        {
            points   = new List <Point>();
            this.pen = new Pen(color, width);

            painter    = new EllipsePainter();
            calculator = new EllipseCalculator();
            checker    = new EllipseChecker();
            mover      = new EllipseMover();
        }
        public EllipseFigure(Pen pen)
        {
            points   = new List <Point>();
            this.pen = pen;

            painter    = new EllipsePainter();
            calculator = new EllipseCalculator();
            checker    = new EllipseChecker();
            mover      = new EllipseMover();
        }