[3244] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[9456] | 3 | * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3244] | 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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[4651] | 25 | using System.Drawing.Imaging;
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[9963] | 26 | using System.IO;
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| 27 | using System.Linq;
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[3244] | 28 | using System.Windows.Forms;
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[9835] | 29 | using Point = System.Drawing.Point;
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[3244] | 30 |
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| 31 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Views {
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[8942] | 32 | public partial class SymbolicExpressionTreeChart : UserControl {
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[3470] | 33 | private Image image;
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[3244] | 34 | private StringFormat stringFormat;
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[5513] | 35 | private Dictionary<ISymbolicExpressionTreeNode, VisualSymbolicExpressionTreeNode> visualTreeNodes;
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[6803] | 36 | private Dictionary<Tuple<ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode>, VisualSymbolicExpressionTreeNodeConnection> visualLines;
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[9963] | 37 | private readonly ReingoldTilfordLayoutEngine<ISymbolicExpressionTreeNode> layoutEngine = new ReingoldTilfordLayoutEngine<ISymbolicExpressionTreeNode> { MinHorizontalSpacing = 5, MinVerticalSpacing = 5 };
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| 38 | private readonly SymbolicExpressionTreeLayoutAdapter layoutAdapter = new SymbolicExpressionTreeLayoutAdapter();
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[3244] | 39 |
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[9963] | 40 |
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[3244] | 41 | public SymbolicExpressionTreeChart() {
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| 42 | InitializeComponent();
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[3470] | 43 | this.image = new Bitmap(Width, Height);
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[8942] | 44 | this.stringFormat = new StringFormat { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center };
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[3244] | 45 | this.spacing = 5;
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| 46 | this.lineColor = Color.Black;
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| 47 | this.backgroundColor = Color.White;
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| 48 | this.textFont = new Font("Times New Roman", 8);
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| 49 | }
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| 50 |
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[5513] | 51 | public SymbolicExpressionTreeChart(ISymbolicExpressionTree tree)
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[3244] | 52 | : this() {
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| 53 | this.Tree = tree;
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| 54 | }
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| 55 |
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[9835] | 56 | #region Public properties
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[3244] | 57 | private int spacing;
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| 58 | public int Spacing {
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| 59 | get { return this.spacing; }
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| 60 | set {
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| 61 | this.spacing = value;
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| 62 | this.Repaint();
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | private Color lineColor;
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| 67 | public Color LineColor {
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| 68 | get { return this.lineColor; }
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| 69 | set {
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| 70 | this.lineColor = value;
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| 71 | this.Repaint();
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | private Color backgroundColor;
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| 76 | public Color BackgroundColor {
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| 77 | get { return this.backgroundColor; }
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| 78 | set {
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| 79 | this.backgroundColor = value;
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| 80 | this.Repaint();
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| 81 | }
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| 82 | }
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| 83 |
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| 84 | private Font textFont;
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| 85 | public Font TextFont {
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| 86 | get { return this.textFont; }
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| 87 | set {
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| 88 | this.textFont = value;
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| 89 | this.Repaint();
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| 90 | }
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| 91 | }
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| 92 |
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[5513] | 93 | private ISymbolicExpressionTree tree;
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| 94 | public ISymbolicExpressionTree Tree {
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[3244] | 95 | get { return this.tree; }
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| 96 | set {
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| 97 | tree = value;
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[5513] | 98 | visualTreeNodes = new Dictionary<ISymbolicExpressionTreeNode, VisualSymbolicExpressionTreeNode>();
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[6803] | 99 | visualLines = new Dictionary<Tuple<ISymbolicExpressionTreeNode, ISymbolicExpressionTreeNode>, VisualSymbolicExpressionTreeNodeConnection>();
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[3244] | 100 | if (tree != null) {
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[6803] | 101 | foreach (ISymbolicExpressionTreeNode node in tree.IterateNodesPrefix()) {
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[3244] | 102 | visualTreeNodes[node] = new VisualSymbolicExpressionTreeNode(node);
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[6803] | 103 | if (node.Parent != null) visualLines[Tuple.Create(node.Parent, node)] = new VisualSymbolicExpressionTreeNodeConnection();
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| 104 | }
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[3244] | 105 | }
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| 106 | Repaint();
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| 107 | }
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| 108 | }
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| 109 |
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[6803] | 110 | private bool suspendRepaint;
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| 111 | public bool SuspendRepaint {
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| 112 | get { return suspendRepaint; }
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| 113 | set { suspendRepaint = value; }
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| 114 | }
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[9835] | 115 | #endregion
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[6803] | 116 |
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[3470] | 117 | protected override void OnPaint(PaintEventArgs e) {
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[6803] | 118 | e.Graphics.DrawImage(image, 0, 0);
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[3470] | 119 | base.OnPaint(e);
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| 120 | }
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| 121 | protected override void OnResize(EventArgs e) {
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| 122 | base.OnResize(e);
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[5956] | 123 | if (this.Width <= 1 || this.Height <= 1)
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[3470] | 124 | this.image = new Bitmap(1, 1);
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| 125 | else
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| 126 | this.image = new Bitmap(Width, Height);
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| 127 | this.Repaint();
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| 128 | }
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[3244] | 129 |
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| 130 | public void Repaint() {
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[6803] | 131 | if (!suspendRepaint) {
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| 132 | this.GenerateImage();
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| 133 | this.Refresh();
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| 134 | }
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[3470] | 135 | }
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| 136 |
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[8980] | 137 | public void RepaintNodes() {
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| 138 | if (!suspendRepaint) {
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[8986] | 139 | using (var graphics = Graphics.FromImage(image)) {
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| 140 | graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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| 141 | graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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| 142 | foreach (var visualNode in visualTreeNodes.Values) {
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| 143 | DrawTreeNode(graphics, visualNode);
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| 144 | }
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[8980] | 145 | }
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| 146 | this.Refresh();
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| 147 | }
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| 148 | }
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| 149 |
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| 150 | public void RepaintNode(VisualSymbolicExpressionTreeNode visualNode) {
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| 151 | if (!suspendRepaint) {
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[8986] | 152 | using (var graphics = Graphics.FromImage(image)) {
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| 153 | graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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| 154 | graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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| 155 | DrawTreeNode(graphics, visualNode);
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| 156 | }
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[8980] | 157 | this.Refresh();
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| 158 | }
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| 159 | }
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| 160 |
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[3470] | 161 | private void GenerateImage() {
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| 162 | using (Graphics graphics = Graphics.FromImage(image)) {
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[3244] | 163 | graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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| 164 | graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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| 165 | graphics.Clear(backgroundColor);
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| 166 | if (tree != null) {
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[9963] | 167 | DrawFunctionTree(tree, graphics, 70, 46, 20, 50);
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[3244] | 168 | }
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| 169 | }
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| 170 | }
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| 171 |
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[5513] | 172 | public VisualSymbolicExpressionTreeNode GetVisualSymbolicExpressionTreeNode(ISymbolicExpressionTreeNode symbolicExpressionTreeNode) {
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[3915] | 173 | if (visualTreeNodes.ContainsKey(symbolicExpressionTreeNode))
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| 174 | return visualTreeNodes[symbolicExpressionTreeNode];
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| 175 | return null;
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| 176 | }
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| 177 |
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[6803] | 178 | public VisualSymbolicExpressionTreeNodeConnection GetVisualSymbolicExpressionTreeNodeConnection(ISymbolicExpressionTreeNode parent, ISymbolicExpressionTreeNode child) {
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| 179 | if (child.Parent != parent) throw new ArgumentException();
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| 180 | var key = Tuple.Create(parent, child);
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| 181 | VisualSymbolicExpressionTreeNodeConnection connection = null;
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| 182 | visualLines.TryGetValue(key, out connection);
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| 183 | return connection;
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| 184 | }
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| 185 |
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[3244] | 186 | #region events
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| 187 | public event MouseEventHandler SymbolicExpressionTreeNodeClicked;
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[8942] | 188 | protected virtual void OnSymbolicExpressionTreeNodeClicked(object sender, MouseEventArgs e) {
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[3244] | 189 | var clicked = SymbolicExpressionTreeNodeClicked;
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| 190 | if (clicked != null)
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| 191 | clicked(sender, e);
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| 192 | }
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| 193 |
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[9043] | 194 | protected virtual void SymbolicExpressionTreeChart_MouseClick(object sender, MouseEventArgs e) {
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[3244] | 195 | VisualSymbolicExpressionTreeNode visualTreeNode = FindVisualSymbolicExpressionTreeNodeAt(e.X, e.Y);
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[8942] | 196 | if (visualTreeNode != null) {
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[3244] | 197 | OnSymbolicExpressionTreeNodeClicked(visualTreeNode, e);
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[8942] | 198 | }
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[3244] | 199 | }
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| 200 |
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| 201 | public event MouseEventHandler SymbolicExpressionTreeNodeDoubleClicked;
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[8942] | 202 | protected virtual void OnSymbolicExpressionTreeNodeDoubleClicked(object sender, MouseEventArgs e) {
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[3244] | 203 | var doubleClicked = SymbolicExpressionTreeNodeDoubleClicked;
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| 204 | if (doubleClicked != null)
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| 205 | doubleClicked(sender, e);
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| 206 | }
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| 207 |
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[9043] | 208 | protected virtual void SymbolicExpressionTreeChart_MouseDoubleClick(object sender, MouseEventArgs e) {
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[3244] | 209 | VisualSymbolicExpressionTreeNode visualTreeNode = FindVisualSymbolicExpressionTreeNodeAt(e.X, e.Y);
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| 210 | if (visualTreeNode != null)
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| 211 | OnSymbolicExpressionTreeNodeDoubleClicked(visualTreeNode, e);
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| 212 | }
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| 213 |
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| 214 | public event ItemDragEventHandler SymbolicExpressionTreeNodeDrag;
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[8942] | 215 | protected virtual void OnSymbolicExpressionTreeNodeDragDrag(object sender, ItemDragEventArgs e) {
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[3244] | 216 | var dragged = SymbolicExpressionTreeNodeDrag;
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| 217 | if (dragged != null)
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| 218 | dragged(sender, e);
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| 219 | }
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| 220 |
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| 221 | private VisualSymbolicExpressionTreeNode draggedSymbolicExpressionTree;
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| 222 | private MouseButtons dragButtons;
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| 223 | private void SymbolicExpressionTreeChart_MouseDown(object sender, MouseEventArgs e) {
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| 224 | this.dragButtons = e.Button;
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| 225 | this.draggedSymbolicExpressionTree = FindVisualSymbolicExpressionTreeNodeAt(e.X, e.Y);
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| 226 | }
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| 227 | private void SymbolicExpressionTreeChart_MouseUp(object sender, MouseEventArgs e) {
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| 228 | this.draggedSymbolicExpressionTree = null;
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| 229 | this.dragButtons = MouseButtons.None;
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| 230 | }
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| 231 |
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| 232 | private void SymbolicExpressionTreeChart_MouseMove(object sender, MouseEventArgs e) {
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| 233 | VisualSymbolicExpressionTreeNode visualTreeNode = FindVisualSymbolicExpressionTreeNodeAt(e.X, e.Y);
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| 234 | if (draggedSymbolicExpressionTree != null &&
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| 235 | draggedSymbolicExpressionTree != visualTreeNode) {
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| 236 | OnSymbolicExpressionTreeNodeDragDrag(draggedSymbolicExpressionTree, new ItemDragEventArgs(dragButtons, draggedSymbolicExpressionTree));
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| 237 | draggedSymbolicExpressionTree = null;
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| 238 | } else if (draggedSymbolicExpressionTree == null &&
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| 239 | visualTreeNode != null) {
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| 240 | string tooltipText = visualTreeNode.ToolTip;
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| 241 | if (this.toolTip.GetToolTip(this) != tooltipText)
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| 242 | this.toolTip.SetToolTip(this, tooltipText);
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| 243 |
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| 244 | } else if (visualTreeNode == null)
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| 245 | this.toolTip.SetToolTip(this, "");
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| 246 | }
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| 247 |
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[6803] | 248 | public VisualSymbolicExpressionTreeNode FindVisualSymbolicExpressionTreeNodeAt(int x, int y) {
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[3244] | 249 | foreach (var visualTreeNode in visualTreeNodes.Values) {
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| 250 | if (x >= visualTreeNode.X && x <= visualTreeNode.X + visualTreeNode.Width &&
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| 251 | y >= visualTreeNode.Y && y <= visualTreeNode.Y + visualTreeNode.Height)
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| 252 | return visualTreeNode;
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| 253 | }
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| 254 | return null;
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| 255 | }
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| 256 | #endregion
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| 257 |
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| 258 | #region methods for painting the symbolic expression tree
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[9835] | 259 |
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[9963] | 260 | private void DrawFunctionTree(ISymbolicExpressionTree tree, Graphics graphics, int preferredWidth, int preferredHeight, int minDistance, int maxDistance) {
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| 261 | var layoutNodes = layoutAdapter.Convert(tree).ToList();
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| 262 | layoutEngine.Reset();
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| 263 | layoutEngine.Root = layoutNodes[0];
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| 264 | foreach (var ln in layoutNodes)
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| 265 | layoutEngine.AddNode(ln.Content, ln);
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| 266 | layoutEngine.CalculateLayout();
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| 267 | var nodePositions = layoutEngine.GetNodeCoordinates();
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| 268 | var bounds = layoutEngine.Bounds();
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[3244] | 269 |
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[9835] | 270 | double sx = Width / bounds.Width;
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| 271 | double sy = Height / bounds.Height;
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| 272 |
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[9963] | 273 | double dx = layoutEngine.MinHorizontalSpacing * sx; // scaled horizontal distance
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| 274 | double dy = layoutEngine.MinVerticalSpacing * sy; // scaled vertical distance
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[9835] | 275 |
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| 276 | int maxWidth = (int)Math.Round(dx);
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| 277 | int maxHeight = (int)Math.Round(dy);
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| 278 |
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| 279 | // instead of using the preferred with/height of each node inside the foreach loop below,
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| 280 | // we assume the same width/height for all nodes
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| 281 | int w = Math.Min(preferredWidth, maxWidth - minDistance / 2);
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| 282 | int h = Math.Min(preferredHeight, maxHeight - minDistance / 2);
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| 283 | // adjust scaling factor so that nodes will be at most maxDistance far from each other on the horizontal axis
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| 284 | double offset = 0;
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| 285 | if (maxDistance + w < maxWidth) {
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| 286 | sx *= (double)(maxDistance + w) / maxWidth;
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| 287 | offset = (Width - (sx * bounds.Width)) / 2;
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| 288 | }
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| 289 | foreach (var node in visualTreeNodes.Keys) {
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| 290 | var visualNode = visualTreeNodes[node];
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| 291 | var pos = nodePositions[node];
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| 292 | visualNode.Width = w;
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| 293 | visualNode.Height = h;
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| 294 | visualNode.X = (int)Math.Round(pos.X * sx + offset); ;
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| 295 | visualNode.Y = (int)Math.Round(pos.Y * sy);
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| 296 | DrawTreeNode(graphics, visualNode);
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| 297 | }
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| 298 | graphics.ResetClip(); // reset clip region
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| 299 | foreach (var visualNode in visualTreeNodes.Values) {
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| 300 | var node = visualNode.SymbolicExpressionTreeNode;
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| 301 | foreach (var subtree in node.Subtrees) {
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| 302 | var visualLine = GetVisualSymbolicExpressionTreeNodeConnection(node, subtree);
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| 303 | var visualSubtree = visualTreeNodes[subtree];
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| 304 | var origin = new Point(visualNode.X + visualNode.Width / 2, visualNode.Y + visualNode.Height);
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| 305 | var target = new Point(visualSubtree.X + visualSubtree.Width / 2, visualSubtree.Y);
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| 306 | using (var linePen = new Pen(visualLine.LineColor)) {
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| 307 | linePen.DashStyle = visualLine.DashStyle;
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| 308 | graphics.DrawLine(linePen, origin, target);
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| 309 | }
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| 310 | }
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| 311 | }
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| 312 | }
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| 313 |
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[8980] | 314 | protected void DrawTreeNode(VisualSymbolicExpressionTreeNode visualTreeNode) {
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| 315 | using (var graphics = Graphics.FromImage(image)) {
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| 316 | graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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| 317 | graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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| 318 | DrawTreeNode(graphics, visualTreeNode);
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| 319 | }
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| 320 | }
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| 321 |
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| 322 | protected void DrawTreeNode(Graphics graphics, VisualSymbolicExpressionTreeNode visualTreeNode) {
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| 323 | graphics.Clip = new Region(new Rectangle(visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width + 1, visualTreeNode.Height + 1));
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| 324 | graphics.Clear(backgroundColor);
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| 325 | var node = visualTreeNode.SymbolicExpressionTreeNode;
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[8986] | 326 | using (var textBrush = new SolidBrush(visualTreeNode.TextColor))
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| 327 | using (var nodeLinePen = new Pen(visualTreeNode.LineColor))
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| 328 | using (var nodeFillBrush = new SolidBrush(visualTreeNode.FillColor)) {
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| 329 | //draw terminal node
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| 330 | if (node.SubtreeCount == 0) {
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| 331 | graphics.FillRectangle(nodeFillBrush, visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width, visualTreeNode.Height);
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| 332 | graphics.DrawRectangle(nodeLinePen, visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width, visualTreeNode.Height);
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| 333 | } else {
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| 334 | graphics.FillEllipse(nodeFillBrush, visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width, visualTreeNode.Height);
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| 335 | graphics.DrawEllipse(nodeLinePen, visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width, visualTreeNode.Height);
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| 336 | }
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| 337 | //draw name of symbol
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| 338 | var text = node.ToString();
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| 339 | graphics.DrawString(text, textFont, textBrush, new RectangleF(visualTreeNode.X, visualTreeNode.Y, visualTreeNode.Width, visualTreeNode.Height), stringFormat);
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[8980] | 340 | }
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| 341 | }
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[3244] | 342 | #endregion
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[4651] | 343 | #region save image
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| 344 | private void saveImageToolStripMenuItem_Click(object sender, EventArgs e) {
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| 345 | if (saveFileDialog.ShowDialog() == DialogResult.OK) {
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| 346 | string filename = saveFileDialog.FileName.ToLower();
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| 347 | if (filename.EndsWith("bmp")) SaveImageAsBitmap(filename);
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| 348 | else if (filename.EndsWith("emf")) SaveImageAsEmf(filename);
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| 349 | else SaveImageAsBitmap(filename);
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| 350 | }
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| 351 | }
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| 352 |
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[9587] | 353 | public void SaveImageAsBitmap(string filename) {
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[4651] | 354 | if (tree == null) return;
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| 355 | Image image = new Bitmap(Width, Height);
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| 356 | using (Graphics g = Graphics.FromImage(image)) {
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[5549] | 357 | int height = this.Height / tree.Depth;
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[4651] | 358 | DrawFunctionTree(tree, g, 0, 0, Width, height);
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| 359 | }
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| 360 | image.Save(filename);
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| 361 | }
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| 362 |
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[9587] | 363 | public void SaveImageAsEmf(string filename) {
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[4651] | 364 | if (tree == null) return;
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| 365 | using (Graphics g = CreateGraphics()) {
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| 366 | using (Metafile file = new Metafile(filename, g.GetHdc())) {
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| 367 | using (Graphics emfFile = Graphics.FromImage(file)) {
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[5549] | 368 | int height = this.Height / tree.Depth;
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[4651] | 369 | DrawFunctionTree(tree, emfFile, 0, 0, Width, height);
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| 370 | }
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| 371 | }
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| 372 | g.ReleaseHdc();
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| 373 | }
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| 374 | }
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| 375 | #endregion
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[9963] | 376 | #region export pgf/tikz
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| 377 | private void exportLatexToolStripMenuItem_Click(object sender, EventArgs e) {
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| 378 | using (var dialog = new SaveFileDialog { Filter = "Tex (*.tex)|*.tex" }) {
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| 379 | if (dialog.ShowDialog() != DialogResult.OK) return;
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| 380 | string filename = dialog.FileName.ToLower();
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| 381 | var formatter = new SymbolicExpressionTreeLatexFormatter();
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| 382 | File.WriteAllText(filename, formatter.Format(Tree));
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| 383 | }
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| 384 | }
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| 385 | #endregion
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[3244] | 386 | }
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| 387 | }
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