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.Drawing;
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24 | using System.Linq;
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25 | using System.Windows.Forms;
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26 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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27 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Views;
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28 |
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29 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Views {
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30 | internal delegate void
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31 | ModifyTree(ISymbolicExpressionTree tree, ISymbolicExpressionTreeNode node, ISymbolicExpressionTreeNode oldChild, ISymbolicExpressionTreeNode newChild, bool removeSubtree = true);
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32 |
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33 | internal sealed partial class InteractiveSymbolicExpressionTreeChart : SymbolicExpressionTreeChart {
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34 | private ISymbolicExpressionTreeNode tempNode; //node in clipboard (to be cut/copy/pasted etc)
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35 | private VisualTreeNode<ISymbolicExpressionTreeNode> currSelected; //currently selected node
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36 | private enum EditOp { NoOp, CopySubtree, CutSubtree }
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37 | private EditOp lastOp = EditOp.NoOp;
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38 |
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39 | // delegate to notify the parent container (the view) about the tree edit operations that it needs to perform
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40 | public ModifyTree ModifyTree { get; set; }
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41 |
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42 | public InteractiveSymbolicExpressionTreeChart() {
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43 | InitializeComponent();
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44 | currSelected = null;
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45 | tempNode = null;
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46 | }
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47 |
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48 | private void contextMenuStrip_Opened(object sender, EventArgs e) {
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49 | var menuStrip = (ContextMenuStrip)sender;
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50 | var point = menuStrip.SourceControl.PointToClient(Cursor.Position);
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51 | var ea = new MouseEventArgs(MouseButtons.Left, 1, point.X, point.Y, 0);
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52 | var visualNode = FindVisualSymbolicExpressionTreeNodeAt(ea.X, ea.Y);
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53 | if (visualNode != null) {
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54 | OnSymbolicExpressionTreeNodeClicked(visualNode, ea);
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55 | } else {
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56 | currSelected = null;
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57 | }
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58 |
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59 | if (currSelected == null) {
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60 | insertNodeToolStripMenuItem.Visible = false;
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61 | changeNodeToolStripMenuItem.Visible = false;
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62 | copyToolStripMenuItem.Visible = false;
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63 | cutToolStripMenuItem.Visible = false;
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64 | removeToolStripMenuItem.Visible = false;
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65 | pasteToolStripMenuItem.Visible = false;
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66 | } else {
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67 | var node = currSelected.Content;
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68 | insertNodeToolStripMenuItem.Visible = true;
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69 | changeNodeToolStripMenuItem.Visible = true;
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70 | changeNodeToolStripMenuItem.Enabled = (node is SymbolicExpressionTreeTerminalNode);
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71 | insertNodeToolStripMenuItem.Enabled = !changeNodeToolStripMenuItem.Enabled;
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72 | copyToolStripMenuItem.Visible = true;
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73 | cutToolStripMenuItem.Visible = true;
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74 | removeToolStripMenuItem.Visible = true;
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75 |
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76 | pasteToolStripMenuItem.Visible = true;
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77 | pasteToolStripMenuItem.Enabled = tempNode != null && insertNodeToolStripMenuItem.Enabled
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78 | && !(lastOp == EditOp.CutSubtree && tempNode.IterateNodesBreadth().Contains(node))
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79 | && node.SubtreeCount < node.Symbol.MaximumArity;
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80 | }
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81 | }
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82 |
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83 | protected override void OnSymbolicExpressionTreeNodeClicked(object sender, MouseEventArgs e) {
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84 | currSelected = (VisualTreeNode<ISymbolicExpressionTreeNode>)sender; ;
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85 | base.OnSymbolicExpressionTreeNodeClicked(sender, e);
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86 | }
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87 |
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88 | protected override void OnSymbolicExpressionTreeNodeDoubleClicked(object sender, MouseEventArgs e) {
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89 | currSelected = null;
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90 | base.OnSymbolicExpressionTreeNodeDoubleClicked(sender, e);
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91 | }
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92 |
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93 | private void insertNodeToolStripMenuItem_Click(object sender, EventArgs e) {
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94 | if (currSelected == null || currSelected.Content is SymbolicExpressionTreeTerminalNode) return;
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95 | var parent = currSelected.Content;
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96 |
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97 | using (var dialog = new InsertNodeDialog()) {
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98 | dialog.SetAllowedSymbols(parent.Grammar.Symbols.Where(s => !(s is ProgramRootSymbol || s is StartSymbol || s is Defun || s is GroupSymbol))); // allow everything
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99 | dialog.ShowDialog(this);
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100 | if (dialog.DialogResult != DialogResult.OK) return;
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101 |
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102 | var symbol = dialog.SelectedSymbol();
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103 | var node = symbol.CreateTreeNode();
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104 | if (node is ConstantTreeNode) {
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105 | var constant = node as ConstantTreeNode;
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106 | constant.Value = double.Parse(dialog.constantValueTextBox.Text);
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107 | } else if (node is VariableTreeNode) {
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108 | var variable = node as VariableTreeNode;
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109 | variable.Weight = double.Parse(dialog.variableWeightTextBox.Text);
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110 | variable.VariableName = dialog.variableNamesCombo.Text;
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111 | } else if (node.Symbol.MinimumArity <= parent.SubtreeCount && node.Symbol.MaximumArity >= parent.SubtreeCount) {
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112 | for (int i = parent.SubtreeCount - 1; i >= 0; --i) {
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113 | var child = parent.GetSubtree(i);
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114 | parent.RemoveSubtree(i);
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115 | node.AddSubtree(child);
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116 | }
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117 | }
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118 | // the if condition will always be true for the final else clause above
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119 | if (parent.Symbol.MaximumArity > parent.SubtreeCount) {
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120 | ModifyTree(Tree, parent, null, node);
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121 | }
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122 | }
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123 | currSelected = null;
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124 | }
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125 | private void changeNodeToolStripMenuItem_Click(object sender, EventArgs e) {
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126 | if (currSelected == null) return;
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127 |
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128 | var node = (ISymbolicExpressionTreeNode)currSelected.Content.Clone();
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129 | var originalNode = currSelected.Content;
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130 |
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131 | ISymbolicExpressionTreeNode newNode = null;
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132 | var result = DialogResult.Cancel;
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133 | if (node is ConstantTreeNode) {
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134 | using (var dialog = new ConstantNodeEditDialog(node)) {
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135 | dialog.ShowDialog(this);
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136 | newNode = dialog.NewNode;
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137 | result = dialog.DialogResult;
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138 | }
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139 | } else if (node is VariableTreeNode) {
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140 | using (var dialog = new VariableNodeEditDialog(node)) {
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141 | dialog.ShowDialog(this);
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142 | newNode = dialog.NewNode;
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143 | result = dialog.DialogResult;
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144 | }
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145 | }
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146 | if (result != DialogResult.OK) return;
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147 | ModifyTree(Tree, originalNode.Parent, originalNode, newNode); // this will replace the original node with the new node
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148 | currSelected = null;
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149 | }
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150 | private void cutToolStripMenuItem_Click(object sender, EventArgs e) {
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151 | lastOp = EditOp.CutSubtree;
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152 | copySubtree();
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153 | }
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154 | private void copyToolStripMenuItem_Click(object sender, EventArgs e) {
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155 | lastOp = EditOp.CopySubtree;
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156 | copySubtree();
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157 | }
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158 | private void copySubtree() {
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159 | if (tempNode != null) {
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160 | foreach (var subtree in tempNode.IterateNodesPostfix()) {
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161 | var visualNode = GetVisualSymbolicExpressionTreeNode(subtree);
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162 | visualNode.LineColor = Color.Black;
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163 | visualNode.TextColor = Color.Black;
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164 | if (subtree.Parent != null) {
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165 | var visualLine = GetVisualSymbolicExpressionTreeNodeConnection(subtree.Parent, subtree);
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166 | visualLine.LineColor = Color.Black;
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167 | }
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168 | }
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169 | }
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170 | tempNode = currSelected.Content;
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171 | foreach (var node in tempNode.IterateNodesPostfix()) {
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172 | var visualNode = GetVisualSymbolicExpressionTreeNode(node);
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173 | visualNode.LineColor = Color.LightGray;
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174 | visualNode.TextColor = Color.LightGray;
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175 | foreach (var subtree in node.Subtrees) {
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176 | var visualLine = GetVisualSymbolicExpressionTreeNodeConnection(node, subtree);
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177 | visualLine.LineColor = Color.LightGray;
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178 | }
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179 | }
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180 | currSelected = null;
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181 | RepaintNodes(); // no need to redo the layout and repaint everything since this operation does not change the tree
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182 | }
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183 | private void removeNodeToolStripMenuItem_Click(object sender, EventArgs e) {
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184 | var node = currSelected.Content;
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185 | if (node == tempNode) tempNode = null;
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186 | ModifyTree(Tree, node.Parent, node, null, removeSubtree: false);
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187 | currSelected = null; // because the currently selected node was just deleted
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188 | }
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189 | private void removeSubtreeToolStripMenuItem_Click(object sender, EventArgs e) {
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190 | var node = currSelected.Content;
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191 | if (node.IterateNodesPostfix().Contains(tempNode)) tempNode = null;
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192 | ModifyTree(Tree, node.Parent, node, null, removeSubtree: true);
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193 | currSelected = null; // because the currently selected node was just deleted
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194 | contextMenuStrip.Close(); // avoid display of submenus since the action has already been performed
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195 | }
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196 | private void pasteToolStripMenuItem_Clicked(object sender, EventArgs e) {
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197 | if (!(lastOp == EditOp.CopySubtree || lastOp == EditOp.CutSubtree)) return;
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198 | // check if the copied/cut node (stored in the tempNode) can be inserted as a child of the current selected node
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199 | var node = currSelected.Content;
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200 | if (node is ConstantTreeNode || node is VariableTreeNode) return;
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201 | // check if the currently selected node can accept the copied node as a child
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202 | // no need to check the grammar, an arity check will do just fine here
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203 | if (node.Symbol.MaximumArity <= node.SubtreeCount) return;
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204 | switch (lastOp) {
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205 | case EditOp.CutSubtree: {
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206 | if (tempNode.IterateNodesBreadth().Contains(node))
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207 | throw new ArgumentException();// cannot cut/paste a node into itself
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208 | ModifyTree(Tree, tempNode.Parent, tempNode, null); //remove node from its original parent
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209 | ModifyTree(Tree, node, null, tempNode); //insert it as a child to the new parent
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210 | break;
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211 | }
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212 | case EditOp.CopySubtree: {
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213 | var clone = (SymbolicExpressionTreeNode)tempNode.Clone();
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214 | ModifyTree(Tree, node, null, clone);
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215 | break;
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216 | }
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217 | }
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218 | currSelected = null; // because the tree will have changed
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219 | tempNode = null; // clear the clipboard after one paste
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220 | }
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221 | }
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222 | }
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