1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2014 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.Drawing;
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23 |
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24 | namespace HeuristicLab.Visualization.Primitives {
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25 | public class LabeledEllipse : Ellipse {
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26 | public Font Font { get; set; }
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27 | public string Text { get; set; }
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28 |
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29 | public LabeledEllipse(IChart chart, PointD lowerLeft, PointD upperRight) : base(chart, lowerLeft, upperRight) { }
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30 |
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31 | public LabeledEllipse(IChart chart, PointD lowerLeft, PointD upperRight, Pen pen, Brush brush) : base(chart, lowerLeft, upperRight, pen, brush) { }
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32 |
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33 | public LabeledEllipse(IChart chart, double x1, double y1, double x2, double y2) : this(chart, new PointD(x1, y1), new PointD(x2, y2)) { }
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34 |
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35 | public override void Draw(Graphics graphics) {
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36 | base.Draw(graphics);
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37 | // draw the text in the center of the bounding rectangle4
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38 | var p = Chart.TransformWorldToPixel(new PointD(LowerLeft.X, LowerLeft.Y));
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39 | var s = Chart.TransformWorldToPixel(Size);
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40 | var stringSize = graphics.MeasureString(Text, Font);
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41 | var fontSize = Font.Size * s.Width / stringSize.Width;
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42 | if (fontSize > 12) fontSize = 12; // limit maximum font size so that nodes look nicer
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43 | Font = new Font(Font.FontFamily, fontSize, GraphicsUnit.Pixel);
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44 | stringSize = graphics.MeasureString(Text, Font);
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45 | graphics.DrawString(Text, Font, new SolidBrush(Pen.Color), p.X + (s.Width - stringSize.Width) / 2f, p.Y - (s.Height + stringSize.Height) / 2f);
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46 | }
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47 | }
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48 | }
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