#region License Information /* HeuristicLab * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using System; using System.Collections.Generic; using System.Text; using System.Drawing; namespace HeuristicLab.Visualization { public class Ellipse : RectangularPrimitiveBase { public Ellipse(IChart chart, PointD lowerLeft, PointD upperRight) : base(chart, lowerLeft, upperRight) { } public Ellipse(IChart chart, double x1, double y1, double x2, double y2) : this(chart, new PointD(x1, y1), new PointD(x2, y2)) { } public Ellipse(IChart chart, PointD lowerLeft, PointD upperRight, Pen pen, Brush brush) : base(chart, lowerLeft, upperRight, pen, brush) { } public Ellipse(IChart chart, double x1, double y1, double x2, double y2, Pen pen, Brush brush) : this(chart, new PointD(x1, y1), new PointD(x2, y2), pen, brush) { } public override bool ContainsPoint(PointD point) { if (base.ContainsPoint(point)) return true; PointD midpoint; PointD focus1; PointD focus2; Offset focus1_point; Offset focus2_point; double a = Size.Width / 2; // half length of horizontal axis double b = Size.Height / 2; // half length of vertical axis midpoint = LowerLeft + new Offset(a, b); if (a >= b) { double e = Math.Sqrt(a * a - b * b); // linear eccentricity focus1 = new PointD(midpoint.X - e, midpoint.Y); focus2 = new PointD(midpoint.X + e, midpoint.Y); } else { double e = Math.Sqrt(b * b - a * a); // linear eccentricity focus1 = new PointD(midpoint.X, midpoint.Y - e); focus2 = new PointD(midpoint.X, midpoint.Y + e); } focus1_point = focus1 - point; focus2_point = focus2 - point; return focus1_point.Length + focus2_point.Length <= 2 * Math.Max(a, b); } public override void Draw(Graphics graphics) { Point p = Chart.TransformWorldToPixel(new PointD(LowerLeft.X, LowerLeft.Y + Size.Height)); Size s = Chart.TransformWorldToPixel(Size); if (Brush != null) graphics.FillEllipse(Brush, p.X, p.Y, s.Width, s.Height); graphics.DrawEllipse(Pen, p.X, p.Y, s.Width, s.Height); base.Draw(graphics); } } }