[3915] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[7259] | 3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3915] | 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 HeuristicLab.Common;
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| 28 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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[4068] | 29 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Views;
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[3915] | 30 | using HeuristicLab.MainForm.WindowsForms;
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| 31 |
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[5699] | 32 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Views {
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| 33 | public abstract partial class InteractiveSymbolicDataAnalysisSolutionSimplifierView : AsynchronousContentView {
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[5729] | 34 | private Dictionary<ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode> replacementNodes;
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[5699] | 35 | private Dictionary<ISymbolicExpressionTreeNode, double> nodeImpacts;
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[6113] | 36 | private bool updateInProgress = false;
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[3915] | 37 |
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[5699] | 38 | public InteractiveSymbolicDataAnalysisSolutionSimplifierView() {
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[3915] | 39 | InitializeComponent();
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[5729] | 40 | this.replacementNodes = new Dictionary<ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode>();
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[5699] | 41 | this.nodeImpacts = new Dictionary<ISymbolicExpressionTreeNode, double>();
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[3915] | 42 | this.Caption = "Interactive Solution Simplifier";
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| 43 | }
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| 44 |
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[5699] | 45 | public new ISymbolicDataAnalysisSolution Content {
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| 46 | get { return (ISymbolicDataAnalysisSolution)base.Content; }
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[3915] | 47 | set { base.Content = value; }
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| 48 | }
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| 49 |
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| 50 | protected override void RegisterContentEvents() {
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| 51 | base.RegisterContentEvents();
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| 52 | Content.ModelChanged += new EventHandler(Content_ModelChanged);
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| 53 | Content.ProblemDataChanged += new EventHandler(Content_ProblemDataChanged);
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| 54 | }
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| 55 | protected override void DeregisterContentEvents() {
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| 56 | base.DeregisterContentEvents();
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| 57 | Content.ModelChanged -= new EventHandler(Content_ModelChanged);
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| 58 | Content.ProblemDataChanged -= new EventHandler(Content_ProblemDataChanged);
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| 59 | }
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| 60 |
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| 61 | private void Content_ModelChanged(object sender, EventArgs e) {
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[5699] | 62 | OnModelChanged();
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[3915] | 63 | }
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| 64 | private void Content_ProblemDataChanged(object sender, EventArgs e) {
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[5699] | 65 | OnProblemDataChanged();
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| 66 | }
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| 67 |
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| 68 | protected virtual void OnModelChanged() {
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[3915] | 69 | this.CalculateReplacementNodesAndNodeImpacts();
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| 70 | }
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| 71 |
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[5699] | 72 | protected virtual void OnProblemDataChanged() {
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| 73 | this.CalculateReplacementNodesAndNodeImpacts();
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| 74 | }
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| 75 |
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[3915] | 76 | protected override void OnContentChanged() {
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| 77 | base.OnContentChanged();
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| 78 | this.CalculateReplacementNodesAndNodeImpacts();
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| 79 | this.viewHost.Content = this.Content;
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| 80 | }
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| 81 |
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| 82 | private void CalculateReplacementNodesAndNodeImpacts() {
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| 83 | if (Content != null && Content.Model != null && Content.ProblemData != null) {
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[5722] | 84 | var tree = Content.Model.SymbolicExpressionTree;
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| 85 | var replacementValues = CalculateReplacementValues(tree);
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[5699] | 86 | foreach (var pair in replacementValues) {
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[5729] | 87 | if (!(pair.Key is ConstantTreeNode)) {
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| 88 | replacementNodes[pair.Key] = MakeConstantTreeNode(pair.Value);
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| 89 | }
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[5699] | 90 | }
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[5722] | 91 | nodeImpacts = CalculateImpactValues(Content.Model.SymbolicExpressionTree);
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[3915] | 92 |
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[6113] | 93 | if (!updateInProgress) {
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| 94 | // automatically fold all branches with impact = 1
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| 95 | List<ISymbolicExpressionTreeNode> nodeList = Content.Model.SymbolicExpressionTree.Root.GetSubtree(0).IterateNodesPrefix().ToList();
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| 96 | foreach (var parent in nodeList) {
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[6803] | 97 | for (int subTreeIndex = 0; subTreeIndex < parent.SubtreeCount; subTreeIndex++) {
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[6113] | 98 | var child = parent.GetSubtree(subTreeIndex);
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| 99 | if (!(child.Symbol is Constant) && nodeImpacts[child].IsAlmost(0.0)) {
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| 100 | SwitchNodeWithReplacementNode(parent, subTreeIndex);
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| 101 | }
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[5455] | 102 | }
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| 103 | }
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| 104 | }
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[6113] | 105 |
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[5993] | 106 | // show only interesting part of solution
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[6803] | 107 | if (tree.Root.SubtreeCount > 1)
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[5993] | 108 | this.treeChart.Tree = new SymbolicExpressionTree(tree.Root); // RPB + ADFs
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| 109 | else
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| 110 | this.treeChart.Tree = new SymbolicExpressionTree(tree.Root.GetSubtree(0).GetSubtree(0)); // 1st child of RPB
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[3915] | 111 | this.PaintNodeImpacts();
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| 112 | }
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| 113 | }
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| 114 |
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[5717] | 115 | protected abstract Dictionary<ISymbolicExpressionTreeNode, double> CalculateReplacementValues(ISymbolicExpressionTree tree);
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| 116 | protected abstract Dictionary<ISymbolicExpressionTreeNode, double> CalculateImpactValues(ISymbolicExpressionTree tree);
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| 117 | protected abstract void UpdateModel(ISymbolicExpressionTree tree);
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[3915] | 118 |
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| 119 | private ConstantTreeNode MakeConstantTreeNode(double value) {
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| 120 | Constant constant = new Constant();
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| 121 | constant.MinValue = value - 1;
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| 122 | constant.MaxValue = value + 1;
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| 123 | ConstantTreeNode constantTreeNode = (ConstantTreeNode)constant.CreateTreeNode();
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| 124 | constantTreeNode.Value = value;
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| 125 | return constantTreeNode;
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| 126 | }
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| 127 |
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| 128 | private void treeChart_SymbolicExpressionTreeNodeDoubleClicked(object sender, MouseEventArgs e) {
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| 129 | VisualSymbolicExpressionTreeNode visualTreeNode = (VisualSymbolicExpressionTreeNode)sender;
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[5722] | 130 | var tree = Content.Model.SymbolicExpressionTree;
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| 131 | foreach (SymbolicExpressionTreeNode treeNode in tree.IterateNodesPostfix()) {
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[6803] | 132 | for (int i = 0; i < treeNode.SubtreeCount; i++) {
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[5736] | 133 | ISymbolicExpressionTreeNode subTree = treeNode.GetSubtree(i);
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[5993] | 134 | // only allow to replace nodes for which a replacement value is known (replacement value for ADF nodes are not available)
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| 135 | if (subTree == visualTreeNode.SymbolicExpressionTreeNode && replacementNodes.ContainsKey(subTree)) {
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[5729] | 136 | SwitchNodeWithReplacementNode(treeNode, i);
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[5993] | 137 |
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| 138 | // show only interesting part of solution
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[6803] | 139 | if (tree.Root.SubtreeCount > 1)
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[5993] | 140 | this.treeChart.Tree = new SymbolicExpressionTree(tree.Root); // RPB + ADFs
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| 141 | else
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| 142 | this.treeChart.Tree = new SymbolicExpressionTree(tree.Root.GetSubtree(0).GetSubtree(0)); // 1st child of RPB
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[6108] | 143 |
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[6113] | 144 | updateInProgress = true;
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[6108] | 145 | UpdateModel(tree);
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[6113] | 146 | updateInProgress = false;
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[5993] | 147 | return; // break all loops
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[3915] | 148 | }
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| 149 | }
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| 150 | }
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| 151 | }
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| 152 |
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[5729] | 153 | private void SwitchNodeWithReplacementNode(ISymbolicExpressionTreeNode parent, int subTreeIndex) {
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[5736] | 154 | ISymbolicExpressionTreeNode subTree = parent.GetSubtree(subTreeIndex);
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| 155 | parent.RemoveSubtree(subTreeIndex);
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[5729] | 156 | if (replacementNodes.ContainsKey(subTree)) {
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| 157 | var replacementNode = replacementNodes[subTree];
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[5736] | 158 | parent.InsertSubtree(subTreeIndex, replacementNode);
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[5729] | 159 | // exchange key and value
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| 160 | replacementNodes.Remove(subTree);
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| 161 | replacementNodes.Add(replacementNode, subTree);
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| 162 | }
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[5455] | 163 | }
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| 164 |
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[3915] | 165 | private void PaintNodeImpacts() {
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| 166 | var impacts = nodeImpacts.Values;
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| 167 | double max = impacts.Max();
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| 168 | double min = impacts.Min();
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[5722] | 169 | foreach (ISymbolicExpressionTreeNode treeNode in Content.Model.SymbolicExpressionTree.IterateNodesPostfix()) {
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[4477] | 170 | if (!(treeNode is ConstantTreeNode) && nodeImpacts.ContainsKey(treeNode)) {
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[5729] | 171 | double impact = nodeImpacts[treeNode];
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[3915] | 172 | VisualSymbolicExpressionTreeNode visualTree = treeChart.GetVisualSymbolicExpressionTreeNode(treeNode);
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[5722] | 173 |
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[5717] | 174 | // impact = 0 if no change
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| 175 | // impact < 0 if new solution is better
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| 176 | // impact > 0 if new solution is worse
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| 177 | if (impact < 0.0) {
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[5729] | 178 | // min is guaranteed to be < 0
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[5717] | 179 | visualTree.FillColor = Color.FromArgb((int)(impact / min * 255), Color.Red);
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[5729] | 180 | } else if (impact.IsAlmost(0.0)) {
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| 181 | visualTree.FillColor = Color.White;
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[5717] | 182 | } else {
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[5729] | 183 | // max is guaranteed to be > 0
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[5717] | 184 | visualTree.FillColor = Color.FromArgb((int)(impact / max * 255), Color.Green);
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| 185 | }
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[3915] | 186 | visualTree.ToolTip += Environment.NewLine + "Node impact: " + impact;
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[5729] | 187 | var constantReplacementNode = replacementNodes[treeNode] as ConstantTreeNode;
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| 188 | if (constantReplacementNode != null) {
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| 189 | visualTree.ToolTip += Environment.NewLine + "Replacement value: " + constantReplacementNode.Value;
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| 190 | }
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[6108] | 191 | }
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[3915] | 192 | }
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| 193 | this.PaintCollapsedNodes();
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| 194 | this.treeChart.Repaint();
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| 195 | }
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| 196 |
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| 197 | private void PaintCollapsedNodes() {
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[5722] | 198 | foreach (ISymbolicExpressionTreeNode treeNode in Content.Model.SymbolicExpressionTree.IterateNodesPostfix()) {
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[5729] | 199 | if (treeNode is ConstantTreeNode && replacementNodes.ContainsKey(treeNode))
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[3915] | 200 | this.treeChart.GetVisualSymbolicExpressionTreeNode(treeNode).LineColor = Color.DarkOrange;
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[4477] | 201 | else {
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| 202 | VisualSymbolicExpressionTreeNode visNode = treeChart.GetVisualSymbolicExpressionTreeNode(treeNode);
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| 203 | if (visNode != null)
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| 204 | visNode.LineColor = Color.Black;
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| 205 | }
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[3915] | 206 | }
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| 207 | }
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[3927] | 208 |
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| 209 | private void btnSimplify_Click(object sender, EventArgs e) {
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[5722] | 210 | SymbolicDataAnalysisExpressionTreeSimplifier simplifier = new SymbolicDataAnalysisExpressionTreeSimplifier();
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| 211 | var simplifiedExpressionTree = simplifier.Simplify(Content.Model.SymbolicExpressionTree);
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| 212 | UpdateModel(simplifiedExpressionTree);
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[3927] | 213 | }
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[6256] | 214 |
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| 215 | protected abstract void btnOptimizeConstants_Click(object sender, EventArgs e);
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[3915] | 216 | }
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| 217 | }
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