1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2008 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.Linq;
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25 | using System.Windows.Forms;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.GP.Interfaces;
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28 | using System.Text;
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29 | using HeuristicLab.Random;
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30 |
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31 | namespace HeuristicLab.GP {
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32 | public partial class FunctionLibraryEditor : EditorBase {
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33 | private ChooseItemDialog chooseFunctionDialog;
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34 | public FunctionLibrary FunctionLibrary {
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35 | get { return (FunctionLibrary)Item; }
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36 | set { base.Item = value; }
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37 | }
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38 |
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39 | public FunctionLibraryEditor()
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40 | : base() {
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41 | InitializeComponent();
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42 | }
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43 |
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44 | public FunctionLibraryEditor(FunctionLibrary library)
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45 | : this() {
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46 | FunctionLibrary = library;
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47 | }
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48 |
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49 | protected override void AddItemEvents() {
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50 | base.AddItemEvents();
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51 | base.Item.Changed += (sender, args) => UpdateControls();
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52 | }
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53 |
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54 | protected override void UpdateControls() {
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55 | base.UpdateControls();
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56 | mutationListView.Items.Clear();
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57 | initListView.Items.Clear();
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58 | functionsListView.Clear();
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59 | functionsComboBox.Items.Clear();
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60 | foreach (IFunction fun in FunctionLibrary.Functions) {
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61 | functionsListView.Items.Add(CreateListViewItem(fun));
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62 | functionsComboBox.Items.Add(fun);
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63 | if (fun.Manipulator != null) {
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64 | mutationListView.Items.Add(CreateListViewItem(fun));
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65 | }
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66 | if (fun.Initializer != null) {
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67 | initListView.Items.Add(CreateListViewItem(fun));
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68 | }
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69 | }
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70 | }
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71 |
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72 | private void mutationListView_SelectedIndexChanged(object sender, EventArgs e) {
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73 | if (mutationListView.SelectedItems.Count > 0 && mutationListView.SelectedItems[0].Tag != null) {
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74 | IOperator manipulator = ((IFunction)mutationListView.SelectedItems[0].Tag).Manipulator;
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75 | mutationVariableView.Enabled = true;
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76 | mutationVariableView.Variable = new Variable("Manipulator", manipulator);
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77 | } else {
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78 | mutationVariableView.Enabled = false;
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79 | }
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80 | }
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81 |
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82 | private void initListView_SelectedIndexChanged(object sender, EventArgs e) {
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83 | if (initListView.SelectedItems.Count > 0 && initListView.SelectedItems[0].Tag != null) {
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84 | IOperator initializer = ((IFunction)initListView.SelectedItems[0].Tag).Initializer;
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85 | initVariableView.Enabled = true;
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86 | initVariableView.Variable = new Variable("Initializer", initializer);
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87 | } else {
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88 | initVariableView.Enabled = false;
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89 | }
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90 | }
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91 |
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92 | private void addButton_Click(object sender, EventArgs e) {
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93 | if (chooseFunctionDialog == null) chooseFunctionDialog = new ChooseItemDialog(typeof(IFunction));
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94 | if (chooseFunctionDialog.ShowDialog(this) == DialogResult.OK) {
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95 | FunctionLibrary.AddFunction((IFunction)chooseFunctionDialog.Item);
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96 | }
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97 | }
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98 |
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99 | private void removeButton_Click(object sender, EventArgs e) {
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100 | // delete from the end of the list
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101 | List<int> removeIndices = functionsListView.SelectedIndices.OfType<int>().OrderBy(x => 1.0 / x).ToList();
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102 | try {
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103 | Cursor = Cursors.WaitCursor;
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104 | foreach (int selectedIndex in removeIndices) {
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105 | FunctionLibrary.RemoveFunction((IFunction)functionsListView.Items[selectedIndex].Tag);
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106 | }
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107 | }
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108 | finally {
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109 | Cursor = Cursors.Default;
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110 | }
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111 | }
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112 |
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113 | private void functionsListView_SelectedIndexChanged(object sender, EventArgs e) {
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114 | if (functionsListView.SelectedIndices.Count > 0) {
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115 | removeButton.Enabled = true;
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116 | } else {
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117 | removeButton.Enabled = false;
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118 | }
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119 | }
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120 |
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121 | private ListViewItem CreateListViewItem(IFunction function) {
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122 | ListViewItem item = new ListViewItem();
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123 | item.Name = function.Name;
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124 | item.Text = function.Name;
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125 | item.Tag = function;
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126 | return item;
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127 | }
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128 |
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129 | private void functionsListView_ItemDrag(object sender, ItemDragEventArgs e) {
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130 | ListViewItem item = (ListViewItem)e.Item;
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131 | IFunction fun = (IFunction)item.Tag;
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132 | DataObject data = new DataObject();
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133 | data.SetData("IFunction", fun);
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134 | data.SetData("DragSource", functionsListView);
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135 | DoDragDrop(data, DragDropEffects.Link);
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136 | }
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137 |
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138 | private void functionsComboBox_SelectedIndexChanged(object sender, EventArgs e) {
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139 | if (functionsComboBox.SelectedItem != null) {
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140 | IFunction selectedFun = (IFunction)functionsComboBox.SelectedItem;
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141 | Control funView = (Control)selectedFun.CreateView();
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142 | funView.Dock = DockStyle.Fill;
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143 | functionDetailsPanel.Controls.Clear();
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144 | functionDetailsPanel.Controls.Add(funView);
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145 | }
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146 | }
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147 |
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148 | private void functionsListView_KeyUp(object sender, KeyEventArgs e) {
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149 | if (e.KeyCode == Keys.Delete && functionsListView.SelectedItems.Count > 0) {
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150 | List<IFunction> removedFunctions = new List<IFunction>(from x in functionsListView.SelectedItems.OfType<ListViewItem>()
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151 | select (IFunction)x.Tag);
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152 | try {
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153 | Cursor = Cursors.WaitCursor;
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154 | foreach (var fun in removedFunctions) {
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155 | FunctionLibrary.RemoveFunction(fun);
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156 | }
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157 | }
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158 | finally {
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159 | Cursor = Cursors.Default;
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160 | }
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161 | }
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162 | }
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163 |
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164 | private void tabControl_Selected(object sender, TabControlEventArgs e) {
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165 | if (e.TabPage == testTabPage) {
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166 | outputTextBox.Text = TestFunctionLibrary();
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167 | }
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168 | }
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169 |
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170 | private string TestFunctionLibrary() {
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171 | int n = 1000;
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172 | IFunctionTree[] randomTrees = CreateRandomTrees(n, 1, 100);
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173 |
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174 | StringBuilder builder = new StringBuilder();
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175 | builder.AppendLine(CalculateFunctionFrequencies(randomTrees));
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176 | return builder.ToString();
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177 | }
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178 |
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179 | private string CalculateFunctionFrequencies(IFunctionTree[] randomTrees) {
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180 | Dictionary<IFunction, int> occurances = new Dictionary<IFunction, int>();
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181 | double n = 0.0;
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182 | for (int i = 0; i < randomTrees.Length; i++) {
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183 | foreach (var node in FunctionTreeIterator.IteratePrefix(randomTrees[i])) {
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184 | if (node.SubTrees.Count > 0) {
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185 | if (!occurances.ContainsKey(node.Function))
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186 | occurances[node.Function] = 0;
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187 | occurances[node.Function]++;
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188 | n++;
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189 | }
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190 | }
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191 | }
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192 | StringBuilder strBuilder = new StringBuilder();
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193 | foreach (var function in occurances.Keys) {
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194 | strBuilder.Append(Environment.NewLine);
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195 | strBuilder.Append(function.Name); strBuilder.Append(": ");
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196 | strBuilder.AppendFormat("{0:#0.00%}", occurances[function] / n);
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197 | }
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198 | return strBuilder.ToString();
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199 | }
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200 |
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201 | private IFunctionTree[] CreateRandomTrees(int popSize, int minSize, int maxSize) {
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202 | int maxHeight = 10;
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203 | int maxTries = 100;
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204 | IFunctionTree[] randomTrees = new IFunctionTree[popSize];
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205 | MersenneTwister twister = new MersenneTwister();
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206 | for (int i = 0; i < randomTrees.Length; i++) {
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207 | int treeSize = twister.Next(minSize, maxSize);
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208 | IFunctionTree root;
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209 | int tries = 0;
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210 | TreeGardener gardener = new TreeGardener(twister, FunctionLibrary);
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211 | do {
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212 | root = gardener.PTC2(treeSize, maxSize);
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213 | if (tries++ >= maxTries) {
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214 | // try a different size
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215 | treeSize = twister.Next(minSize, maxSize);
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216 | tries = 0;
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217 | }
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218 | } while (root.GetSize() > maxSize || root.GetHeight() > maxHeight);
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219 | randomTrees[i] = root;
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220 | }
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221 | return randomTrees;
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222 | }
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223 |
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224 | }
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225 | }
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