1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2016 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.Globalization;
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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 | using HeuristicLab.Problems.DataAnalysis;
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29 |
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30 | namespace HeuristicLab.Algorithms.DataAnalysis.Views {
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31 | public partial class DensityTrackbar : UserControl {
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32 |
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33 | public decimal Value {
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34 | get { return TickToValue(trackBar.Value); }
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35 | set { trackBar.Value = ValueToTick(value); }
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36 | }
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37 | public event EventHandler ValueChanged;
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38 |
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39 | public bool Checked {
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40 | get { return radioButton.Checked; }
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41 | set { radioButton.Checked = value; }
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42 | }
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43 | public event EventHandler CheckedChanged;
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44 |
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45 | public DoubleLimit Limits {
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46 | get { return doubleLimitView.Content; }
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47 | }
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48 | public event EventHandler LimitsChanged;
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49 |
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50 | private IList<double> trainingValues;
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51 |
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52 | internal DensityTrackbar() {
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53 | InitializeComponent();
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54 | }
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55 |
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56 | public DensityTrackbar(string name, DoubleLimit limit, IList<double> trainingValues) {
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57 | InitializeComponent();
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58 |
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59 | this.trainingValues = trainingValues;
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60 |
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61 | doubleLimitView.Content = limit;
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62 | doubleLimitView.Content.ValueChanged += doubleLimit_ValueChanged;
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63 |
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64 | textBox.Text = Value.ToString(CultureInfo.InvariantCulture);
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65 | radioButton.Text = name;
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66 |
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67 | UpdateDensityChart();
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68 | }
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69 |
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70 | public void UpdateTrainingValues(IList<double> trainingValues) {
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71 | this.trainingValues = trainingValues;
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72 | UpdateDensityChart();
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73 | }
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74 |
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75 | private void UpdateDensityChart() {
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76 | var series = chart.Series[0];
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77 | ClearPointsQuick(series.Points);
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78 |
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79 | int numBuckets = trackBar.Maximum - trackBar.Minimum;
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80 | var buckets = new double[numBuckets];
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81 | var bucketSize = (Limits.Upper - Limits.Lower) / buckets.Length;
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82 | foreach (var value in trainingValues) {
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83 | if (bucketSize > 0.0) {
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84 | int bucketIndex = (int)((value - Limits.Lower) / bucketSize);
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85 | if (bucketIndex == numBuckets) {
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86 | bucketIndex--;
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87 | }
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88 | buckets[bucketIndex] += 1.0;
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89 | }
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90 | }
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91 |
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92 | // set minimum height of all non-zero buckets on 20% of maximum
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93 | double min = buckets.Max() / 20.0;
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94 | for (int i = 0; i < buckets.Length; i++) {
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95 | if (buckets[i] >= 1 && buckets[i] < min)
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96 | buckets[i] = min;
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97 | }
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98 |
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99 | series.Points.DataBindY(buckets);
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100 | }
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101 |
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102 | #region Event Handlers
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103 | private void trackBar_ValueChanged(object sender, EventArgs e) {
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104 | textBox.Text = Value.ToString(CultureInfo.InvariantCulture);
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105 | OnValueChanged();
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106 | }
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107 | private void doubleLimit_ValueChanged(object sender, EventArgs e) {
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108 | UpdateDensityChart();
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109 | OnLimitsChanged();
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110 | OnValueChanged();
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111 | }
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112 | private void radioButton_CheckedChanged(object sender, EventArgs e) {
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113 | Checked = radioButton.Checked;
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114 | trackBar.Enabled = !Checked;
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115 | textBox.Text = Checked ? "Plotted" : Value.ToString(CultureInfo.InvariantCulture);
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116 | OnCheckedChanged();
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117 | }
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118 | protected override void OnTextChanged(EventArgs e) {
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119 | base.OnTextChanged(e);
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120 | radioButton.Text = Text;
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121 | }
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122 | #endregion
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123 |
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124 | protected virtual void OnValueChanged() {
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125 | if (ValueChanged != null)
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126 | ValueChanged(this, EventArgs.Empty);
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127 | }
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128 | protected virtual void OnCheckedChanged() {
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129 | if (CheckedChanged != null)
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130 | CheckedChanged(this, EventArgs.Empty);
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131 | }
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132 | protected virtual void OnLimitsChanged() {
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133 | if (LimitsChanged != null)
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134 | LimitsChanged(this, EventArgs.Empty);
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135 | }
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136 |
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137 | #region Hepers
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138 |
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139 | private decimal TickToValue(int tick) {
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140 | return TickToValue(tick, trackBar.Maximum - trackBar.Minimum, (decimal)Limits.Lower, (decimal)Limits.Upper);
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141 | }
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142 | private int ValueToTick(decimal value) {
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143 | return ValueToTick(value, trackBar.Maximum - trackBar.Minimum, (decimal)Limits.Lower, (decimal)Limits.Upper);
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144 | }
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145 | private static decimal TickToValue(int tick, int numberOfTicks, decimal lower, decimal upper) {
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146 | return lower + (upper - lower) * tick / numberOfTicks;
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147 | }
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148 | private static int ValueToTick(decimal value, int numberOfTicks, decimal lower, decimal upper) {
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149 | return (int)((value - lower) / ((upper - lower) / numberOfTicks));
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150 | }
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151 |
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152 | // workaround as per http://stackoverflow.com/questions/5744930/datapointcollection-clear-performance
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153 | private static void ClearPointsQuick(DataPointCollection points) {
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154 | points.SuspendUpdates();
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155 | while (points.Count > 0)
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156 | points.RemoveAt(points.Count - 1);
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157 | points.ResumeUpdates();
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158 | }
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159 |
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160 | #endregion
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161 |
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162 |
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163 | }
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164 | }
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