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;
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23 | using System.Collections.Generic;
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24 | using System.Drawing;
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25 | using System.Linq;
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26 | using System.Windows.Forms;
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27 | using System.Windows.Forms.DataVisualization.Charting;
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28 |
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29 | namespace HeuristicLab.Visualization.ChartControlsExtensions {
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30 | public partial class HistogramControl : UserControl {
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31 | protected static readonly string SeriesName = "Histogram";
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32 |
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33 | protected Dictionary<string, List<double>> points;
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34 | public int NumberOfBins {
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35 | get { return (int)binsNumericUpDown.Value; }
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36 | set { binsNumericUpDown.Value = value; }
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37 | }
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38 |
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39 | public int MinimumNumberOfBins {
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40 | get { return (int)binsNumericUpDown.Minimum; }
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41 | set { binsNumericUpDown.Minimum = value; }
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42 | }
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43 |
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44 | public int MaximumNumberOfBins {
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45 | get { return (int)binsNumericUpDown.Maximum; }
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46 | set { binsNumericUpDown.Maximum = value; }
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47 | }
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48 |
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49 | public int IncrementNumberOfBins {
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50 | get { return (int)binsNumericUpDown.Increment; }
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51 | set { binsNumericUpDown.Increment = value; }
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52 | }
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53 |
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54 | public bool CalculateExactBins {
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55 | get { return exactCheckBox.Checked; }
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56 | set { exactCheckBox.Checked = value; }
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57 | }
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58 |
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59 | public bool ShowExactCheckbox {
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60 | get { return exactCheckBox.Visible; }
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61 | set { exactCheckBox.Visible = value; }
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62 | }
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63 |
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64 | public HistogramControl() {
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65 | InitializeComponent();
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66 | points = new Dictionary<string, List<double>>();
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67 | InitializeChart();
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68 | }
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69 |
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70 | protected void InitNewRow(string name) {
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71 | if (!points.ContainsKey(name)) {
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72 | points.Add(name, new List<double>());
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73 | }
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74 | }
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75 |
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76 | protected void InitSeries(string name) {
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77 | if (!chart.Series.Any(x => x.Name == name)) {
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78 | Series s = chart.Series.Add(name);
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79 | s.ChartType = SeriesChartType.Column;
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80 | s.BorderColor = Color.Black;
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81 | s.BorderWidth = 1;
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82 | s.BorderDashStyle = ChartDashStyle.Solid;
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83 | }
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84 | }
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85 |
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86 | public void AddPoint(double point) {
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87 | InitNewRow(SeriesName);
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88 | InitSeries(SeriesName);
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89 | points[SeriesName].Add(point);
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90 | UpdateHistogram();
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91 | }
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92 |
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93 | public void AddPoints(IEnumerable<double> points) {
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94 | InitNewRow(SeriesName);
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95 | InitSeries(SeriesName);
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96 | this.points[SeriesName].AddRange(points);
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97 | UpdateHistogram();
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98 | }
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99 |
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100 | public void AddPoint(string name, double point, bool replace = false) {
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101 | InitNewRow(name);
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102 | InitSeries(name);
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103 | if (replace) {
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104 | points[name].Clear();
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105 | }
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106 | points[name].Add(point);
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107 | UpdateHistogram();
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108 | }
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109 |
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110 | public void AddPoints(string name, IEnumerable<double> points, bool replace = false) {
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111 | InitNewRow(name);
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112 | InitSeries(name);
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113 | if (replace) {
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114 | this.points[name].Clear();
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115 | }
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116 | this.points[name].AddRange(points);
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117 | UpdateHistogram();
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118 | }
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119 |
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120 | public void ClearPoints() {
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121 | points.Clear();
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122 | UpdateHistogram();
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123 | }
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124 |
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125 | protected void InitializeChart() {
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126 | chart.Series.Clear();
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127 | }
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128 |
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129 | protected void UpdateHistogram() {
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130 | if (InvokeRequired) {
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131 | Invoke((Action)UpdateHistogram, null);
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132 | return;
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133 | }
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134 |
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135 | double overallMin = double.MaxValue;
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136 | double overallMax = double.MinValue;
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137 | int bins = (int)binsNumericUpDown.Value;
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138 |
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139 | chart.Series.Clear();
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140 |
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141 | foreach (var point in points) {
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142 | if (!point.Value.Any()) continue;
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143 |
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144 | Series histogramSeries = new Series(point.Key);
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145 | chart.Series.Add(histogramSeries);
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146 |
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147 | double minValue = point.Value.Min();
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148 | double maxValue = point.Value.Max();
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149 | double intervalWidth = (maxValue - minValue) / bins;
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150 | if (intervalWidth <= 0) continue;
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151 |
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152 | if (!exactCheckBox.Checked) {
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153 | intervalWidth = HumanRoundRange(intervalWidth);
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154 | minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
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155 | maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
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156 | }
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157 |
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158 | double current = minValue, intervalCenter = intervalWidth / 2.0;
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159 | int count = 0;
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160 | foreach (double v in point.Value.OrderBy(x => x)) {
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161 | while (v > current + intervalWidth) {
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162 | histogramSeries.Points.AddXY(current + intervalCenter, count);
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163 | current += intervalWidth;
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164 | count = 0;
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165 | }
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166 | count++;
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167 | }
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168 | histogramSeries.Points.AddXY(current + intervalCenter, count);
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169 | histogramSeries["PointWidth"] = "1";
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170 |
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171 | overallMax = Math.Max(overallMax, maxValue);
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172 | overallMin = Math.Min(overallMin, minValue);
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173 | }
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174 |
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175 | ChartArea chartArea = chart.ChartAreas[0];
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176 | chartArea.AxisY.Title = "Frequency";
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177 | chartArea.AxisX.Minimum = overallMin;
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178 | chartArea.AxisX.Maximum = overallMax;
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179 |
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180 | double overallIntervalWidth = (overallMax - overallMin) / bins;
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181 |
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182 | double axisInterval = overallIntervalWidth;
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183 | while ((overallMax - overallMin) / axisInterval > 10.0) {
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184 | axisInterval *= 2.0;
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185 | }
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186 | chartArea.AxisX.Interval = axisInterval;
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187 | }
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188 |
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189 | protected double HumanRoundRange(double range) {
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190 | double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
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191 | double rounding = range / base10;
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192 | if (rounding <= 1.5) rounding = 1;
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193 | else if (rounding <= 2.25) rounding = 2;
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194 | else if (rounding <= 3.75) rounding = 2.5;
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195 | else if (rounding <= 7.5) rounding = 5;
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196 | else rounding = 10;
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197 | return rounding * base10;
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198 | }
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199 |
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200 | private void binsNumericUpDown_ValueChanged(object sender, EventArgs e) {
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201 | UpdateHistogram();
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202 | }
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203 |
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204 | private void exactCheckBox_CheckedChanged(object sender, EventArgs e) {
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205 | UpdateHistogram();
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206 | }
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207 | }
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208 | }
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