1 | #region License Information |
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2 | /* HeuristicLab |
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3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL) |
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4 | * |
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5 | * This file is part of HeuristicLab. |
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6 | * |
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7 | * HeuristicLab is free software: you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation, either version 3 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * HeuristicLab is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>. |
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19 | */ |
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20 | #endregion |
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21 | |
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22 | using System; |
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23 | using System.Collections.Generic; |
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24 | using System.Text; |
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25 | using System.Drawing; |
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26 | |
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27 | namespace HeuristicLab.Visualization { |
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28 | public class Ellipse : RectangularPrimitiveBase { |
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29 | public Ellipse(IChart chart, PointD lowerLeft, PointD upperRight) |
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30 | : base(chart, lowerLeft, upperRight) { |
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31 | } |
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32 | public Ellipse(IChart chart, double x1, double y1, double x2, double y2) |
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33 | : this(chart, new PointD(x1, y1), new PointD(x2, y2)) { |
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34 | } |
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35 | public Ellipse(IChart chart, PointD lowerLeft, PointD upperRight, Pen pen, Brush brush) |
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36 | : base(chart, lowerLeft, upperRight, pen, brush) { |
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37 | } |
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38 | public Ellipse(IChart chart, double x1, double y1, double x2, double y2, Pen pen, Brush brush) |
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39 | : this(chart, new PointD(x1, y1), new PointD(x2, y2), pen, brush) { |
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40 | } |
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41 | |
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42 | public override bool ContainsPoint(PointD point) { |
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43 | if (base.ContainsPoint(point)) return true; |
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44 | |
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45 | PointD midpoint; |
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46 | PointD focus1; |
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47 | PointD focus2; |
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48 | Offset focus1_point; |
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49 | Offset focus2_point; |
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50 | |
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51 | double a = Size.Width / 2; // half length of horizontal axis |
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52 | double b = Size.Height / 2; // half length of vertical axis |
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53 | midpoint = LowerLeft + new Offset(a, b); |
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54 | |
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55 | if (a >= b) { |
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56 | double e = Math.Sqrt(a * a - b * b); // linear eccentricity |
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57 | focus1 = new PointD(midpoint.X - e, midpoint.Y); |
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58 | focus2 = new PointD(midpoint.X + e, midpoint.Y); |
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59 | } else { |
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60 | double e = Math.Sqrt(b * b - a * a); // linear eccentricity |
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61 | focus1 = new PointD(midpoint.X, midpoint.Y - e); |
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62 | focus2 = new PointD(midpoint.X, midpoint.Y + e); |
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63 | } |
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64 | focus1_point = focus1 - point; |
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65 | focus2_point = focus2 - point; |
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66 | |
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67 | return focus1_point.Length + focus2_point.Length <= 2 * Math.Max(a, b); |
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68 | } |
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69 | |
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70 | public override void Draw(Graphics graphics) { |
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71 | Point p = Chart.TransformWorldToPixel(new PointD(LowerLeft.X, LowerLeft.Y + Size.Height)); |
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72 | Size s = Chart.TransformWorldToPixel(Size); |
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73 | if (Brush != null) |
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74 | graphics.FillEllipse(Brush, p.X, p.Y, s.Width, s.Height); |
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75 | graphics.DrawEllipse(Pen, p.X, p.Y, s.Width, s.Height); |
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76 | base.Draw(graphics); |
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77 | } |
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78 | } |
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79 | } |
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