[7526] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2012 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.Drawing;
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| 24 | using System.Globalization;
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| 25 | using System.Text;
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| 26 | using System.Text.RegularExpressions;
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| 27 | using HeuristicLab.Analysis;
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| 28 | using HeuristicLab.Data;
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| 29 | using HeuristicLab.Data.Views;
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| 30 | using HeuristicLab.MainForm;
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| 31 | using HeuristicLab.MainForm.WindowsForms;
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| 32 |
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| 33 | namespace HeuristicLab.Optimizer.Tools {
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| 34 | [View("MDSView")]
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| 35 | [Content(typeof(IStringConvertibleMatrix), IsDefaultView = false)]
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| 36 | public partial class MDSView : StringConvertibleMatrixView {
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| 37 |
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| 38 | public MDSView() {
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| 39 | InitializeComponent();
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| 40 | }
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| 41 |
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| 42 | protected override void RegisterContentEvents() {
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| 43 | base.RegisterContentEvents();
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| 44 | Content.RowsChanged += new EventHandler(Content_Changed);
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| 45 | Content.ColumnsChanged += new EventHandler(Content_Changed);
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| 46 | }
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| 47 |
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| 48 | protected override void DeregisterContentEvents() {
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| 49 | Content.RowsChanged -= new EventHandler(Content_Changed);
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| 50 | Content.ColumnsChanged -= new EventHandler(Content_Changed);
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| 51 | base.DeregisterContentEvents();
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| 52 | }
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| 53 |
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| 54 | private void Content_Changed(object sender, EventArgs e) {
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| 55 | SetEnabledStateOfControls();
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| 56 | OnRedraw();
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| 57 | }
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| 58 |
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| 59 | protected override void OnContentChanged() {
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| 60 | base.OnContentChanged();
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| 61 | OnRedraw();
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| 62 | }
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| 63 |
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| 64 | protected override void SetEnabledStateOfControls() {
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| 65 | base.SetEnabledStateOfControls();
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| 66 | visualizeCheckBox.Enabled = Content != null && Content.Rows == Content.Columns && Content.Rows > 0;
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| 67 | mdsPictureBox.Visible = visualizeCheckBox.Enabled && visualizeCheckBox.Checked;
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| 68 | }
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| 69 |
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| 70 | private void visualizeCheckBox_CheckedChanged(object sender, System.EventArgs e) {
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| 71 | mdsPictureBox.Visible = visualizeCheckBox.Checked;
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| 72 | OnRedraw();
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| 73 | }
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| 74 |
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| 75 | private void OnRedraw() {
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| 76 | if (InvokeRequired) {
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| 77 | Invoke((Action)OnRedraw, null);
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| 78 | } else {
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| 79 | if (!mdsPictureBox.Visible) return;
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| 80 | GenerateImage();
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| 81 | }
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| 82 | }
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| 83 |
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| 84 | private void GenerateImage() {
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| 85 | if (Content.Rows == Content.Columns && Content.Rows > 0
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| 86 | && mdsPictureBox.Width > 0 && mdsPictureBox.Height > 0) {
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| 87 | Bitmap newBitmap = GenerateDistanceImage();
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| 88 | if (newBitmap != null) {
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| 89 | var oldImage = mdsPictureBox.Image;
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| 90 | mdsPictureBox.Image = newBitmap;
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| 91 | if (oldImage != null) oldImage.Dispose();
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| 92 | }
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| 93 | }
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| 94 | }
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| 95 |
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| 96 | private Bitmap GenerateDistanceImage() {
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| 97 | Bitmap newBitmap = new Bitmap(mdsPictureBox.Width, mdsPictureBox.Height);
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| 98 |
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| 99 | DoubleMatrix coordinates;
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| 100 | double stress = double.NaN;
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| 101 | DoubleMatrix matrix = new DoubleMatrix(Content.Rows, Content.Columns, Content.ColumnNames, Content.RowNames);
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| 102 | try {
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| 103 | for (int i = 0; i < Content.Rows; i++)
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| 104 | for (int j = 0; j < Content.Columns; j++)
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| 105 | matrix[i, j] = double.Parse(Content.GetValue(i, j));
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| 106 | coordinates = MultidimensionalScaling.KruskalShepard(matrix);
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| 107 | stress = MultidimensionalScaling.CalculateNormalizedStress(matrix, coordinates);
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| 108 | statisticsTextBox.Text = "Stress: " + stress.ToString("0.00", CultureInfo.CurrentCulture.NumberFormat);
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| 109 | } catch {
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| 110 | WriteCenteredTextToBitmap(ref newBitmap, "Matrix is not symmetric");
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| 111 | statisticsTextBox.Text = "-";
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| 112 | return newBitmap;
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| 113 | }
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| 114 | double xMin = double.MaxValue, yMin = double.MaxValue, xMax = double.MinValue, yMax = double.MinValue;
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| 115 | double maxDistance = double.MinValue;
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| 116 | for (int i = 0; i < coordinates.Rows; i++) {
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| 117 | if (xMin > coordinates[i, 0]) xMin = coordinates[i, 0];
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| 118 | if (yMin > coordinates[i, 1]) yMin = coordinates[i, 1];
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| 119 | if (xMax < coordinates[i, 0]) xMax = coordinates[i, 0];
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| 120 | if (yMax < coordinates[i, 1]) yMax = coordinates[i, 1];
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| 121 |
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| 122 | for (int j = i + 1; j < coordinates.Rows; j++) {
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| 123 | if (matrix[i, j] > maxDistance) maxDistance = matrix[i, j];
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| 124 | if (matrix[j, i] > maxDistance) maxDistance = matrix[j, i];
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | int border = 20;
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| 129 | double xStep = xMax != xMin ? (mdsPictureBox.Width - 2 * border) / (xMax - xMin) : 1;
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| 130 | double yStep = yMax != yMin ? (mdsPictureBox.Height - 2 * border) / (yMax - yMin) : 1;
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| 131 |
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| 132 | Point[] points = new Point[coordinates.Rows];
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| 133 | for (int i = 0; i < coordinates.Rows; i++)
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| 134 | points[i] = new Point(border + ((int)((coordinates[i, 0] - xMin) * xStep)),
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| 135 | newBitmap.Height - (border + ((int)((coordinates[i, 1] - yMin) * yStep))));
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| 136 |
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| 137 | Random rand = new Random();
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| 138 | using (Graphics graphics = Graphics.FromImage(newBitmap)) {
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| 139 | graphics.Clear(Color.White);
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| 140 | graphics.DrawString("Showing entities spaced out according to their distances.", Font, Brushes.Black, 5, 2);
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| 141 |
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| 142 | for (int i = 0; i < coordinates.Rows - 1; i++) {
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| 143 | for (int j = i + 1; j < coordinates.Rows; j++) {
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| 144 | Point start = points[i], end = points[j];
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| 145 | string caption = String.Empty;
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| 146 | double d = Math.Max(matrix[i, j], matrix[j, i]);
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| 147 | float width = (float)Math.Ceiling(5.0 * d / maxDistance);
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| 148 | if (d > 0) {
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| 149 | graphics.DrawLine(new Pen(Color.IndianRed, width), start, end);
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| 150 | if (matrix[i, j] != matrix[j, i])
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| 151 | caption = matrix[i, j].ToString(CultureInfo.InvariantCulture.NumberFormat)
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| 152 | + " / " + matrix[j, i].ToString(CultureInfo.InvariantCulture.NumberFormat);
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| 153 | else
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| 154 | caption = matrix[i, j].ToString(CultureInfo.InvariantCulture.NumberFormat);
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| 155 | }
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| 156 | if (!String.IsNullOrEmpty(caption)) {
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| 157 | double r = rand.NextDouble();
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| 158 | while (r < 0.2 || r > 0.8) r = rand.NextDouble();
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| 159 | float x = (float)(start.X + (end.X - start.X) * r + 5);
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| 160 | float y = (float)(start.Y + (end.Y - start.Y) * r + 5);
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| 161 | graphics.DrawString(caption, Font, Brushes.Black, x, y);
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| 162 | }
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| 163 | }
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| 164 | }
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| 165 |
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| 166 | for (int i = 0; i < points.Length; i++) {
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| 167 | Point p = new Point(points[i].X - 3, points[i].Y - 3);
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| 168 | graphics.FillRectangle(Brushes.Black, p.X, p.Y, 8, 8);
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| 169 | graphics.DrawString(i.ToString(), Font, Brushes.Black, p.X, p.Y + 10);
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| 170 | }
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| 171 | }
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| 172 | return newBitmap;
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| 173 | }
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| 174 |
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| 175 | private void WriteCenteredTextToBitmap(ref Bitmap bitmap, string text) {
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| 176 | if (bitmap == null) return;
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| 177 | using (Graphics g = Graphics.FromImage(bitmap)) {
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| 178 | g.Clear(Color.White);
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| 179 |
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| 180 | Font font = new Font(FontFamily.GenericSansSerif, 12, FontStyle.Regular);
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| 181 | SizeF strSize = g.MeasureString(text, font);
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| 182 | if (strSize.Width + 50 > mdsPictureBox.Width) {
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| 183 | var m = Regex.Match(text, @"\b\w+[.,]*\b*");
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| 184 | var builder = new StringBuilder();
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| 185 | while (m.Success) {
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| 186 | builder.Append(m.Value + " ");
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| 187 | Match next = m.NextMatch();
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| 188 | if (g.MeasureString(builder.ToString() + " " + next.Value, font).Width + 50 > mdsPictureBox.Width)
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| 189 | builder.AppendLine();
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| 190 | m = next;
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| 191 | }
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| 192 | builder.Remove(builder.Length - 1, 1);
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| 193 | text = builder.ToString();
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| 194 | strSize = g.MeasureString(text, font);
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| 195 | }
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| 196 | g.DrawString(text, font, Brushes.Black, (float)(mdsPictureBox.Width - strSize.Width) / 2.0f, (float)(mdsPictureBox.Height - strSize.Height) / 2.0f);
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| 197 | }
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| 198 | }
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| 199 | }
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| 200 | }
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