[13727] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2015 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.Drawing;
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| 25 | using System.Drawing.Drawing2D;
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| 26 | using System.Linq;
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| 27 | using System.Windows.Forms;
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[13874] | 28 | using HeuristicLab.Common;
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[13727] | 29 | using HeuristicLab.Core;
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| 30 | using HeuristicLab.Random;
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| 31 | using HeuristicLab.Visualization;
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| 32 | using Pen = System.Drawing.Pen;
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| 33 | using Rectangle = HeuristicLab.Visualization.Rectangle;
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| 34 | using Routing = HeuristicLab.VariableInteractionNetworks.Views.ConstrainedForceDirectedLayout.EdgeRouting;
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| 35 |
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| 36 |
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| 37 | namespace HeuristicLab.VariableInteractionNetworks.Views {
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| 38 | public partial class DirectedGraphChart : ChartControl {
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[13874] | 39 | public new Bitmap Picture { get { return base.Picture; } }
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| 40 |
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[13727] | 41 | private ConstrainedForceDirectedLayout layout;
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| 42 | // provide direct and reverse mapping between graph objects and layout shapes
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| 43 | private Dictionary<IPrimitive, IVertex> vertexMap;
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| 44 | private Dictionary<IPrimitive, IArc> arcMap;
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| 45 | private Dictionary<IArc, LinearPrimitiveBase> arcShapes;
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| 46 | private Dictionary<IVertex, RectangularPrimitiveBase> vertexShapes;
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| 47 |
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| 48 | // graph layout options
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[13821] | 49 | public double IdealEdgeLength { get; set; }
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| 50 | public bool PerformEdgeRouting { get; set; }
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[13727] | 51 | public Routing RoutingMode { get; set; }
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| 52 |
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| 53 | public IVertex GetVertex(IPrimitive primitive) {
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| 54 | IVertex v;
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| 55 | vertexMap.TryGetValue(primitive, out v);
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| 56 | return v;
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| 57 | }
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| 58 |
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| 59 | public IArc GetArc(IPrimitive primitive) {
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| 60 | IArc a;
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| 61 | arcMap.TryGetValue(primitive, out a);
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| 62 | return a;
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| 63 | }
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| 64 |
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| 65 | public RectangularPrimitiveBase GetVertexShape(IVertex v) {
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| 66 | RectangularPrimitiveBase p;
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| 67 | vertexShapes.TryGetValue(v, out p);
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| 68 | return p;
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| 69 | }
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| 70 |
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| 71 | public LinearPrimitiveBase GetArcShape(IArc arc) {
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| 72 | LinearPrimitiveBase l;
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| 73 | arcShapes.TryGetValue(arc, out l);
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| 74 | return l;
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| 75 | }
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| 76 |
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| 77 | public ToolTip ToolTip {
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| 78 | get { return toolTip; }
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| 79 | }
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| 80 |
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| 81 | public DirectedGraphChart() {
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| 82 | InitializeComponent();
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| 83 |
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| 84 | var directedGraphChartMode = new DirectedGraphChartMode(this);
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| 85 |
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| 86 | this.AddChartModes(directedGraphChartMode, new PanChartMode(this), new ZoomInChartMode(this), new ZoomOutChartMode(this));
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| 87 | shapes = new Dictionary<Type, LabeledPrimitive>();
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[13789] | 88 | SmoothingMode = SmoothingMode.HighQuality; // set antialiasing for nicer rendering
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[13821] | 89 | IdealEdgeLength = 50;
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[13727] | 90 | }
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| 91 |
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| 92 | private IDirectedGraph graph;
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| 93 | public IDirectedGraph Graph {
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| 94 | get { return graph; }
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| 95 | set {
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[13806] | 96 | if (value == null || graph == value || !value.Vertices.Any()) return;
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[13727] | 97 | graph = value;
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| 98 | Draw();
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | private void RegisterEvents() { }
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| 103 |
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| 104 | private void DeregisterEvents() { }
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| 105 |
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| 106 | public void Draw() {
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| 107 | SuspendRendering();
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| 108 | Chart.Group.Clear();
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| 109 | vertexMap = new Dictionary<IPrimitive, IVertex>();
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| 110 | arcMap = new Dictionary<IPrimitive, IArc>();
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| 111 | var rng = new MersenneTwister();
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| 112 | vertexShapes = new Dictionary<IVertex, RectangularPrimitiveBase>();
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| 113 | arcShapes = new Dictionary<IArc, LinearPrimitiveBase>();
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| 114 | var vertexRectangles = new Dictionary<IVertex, RectangleF>();
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| 115 | foreach (var v in graph.Vertices) {
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| 116 | var shape = CreateShape(v);
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[13789] | 117 | shape.ToolTipText = v.Label;
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[13727] | 118 | vertexMap[shape] = v;
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| 119 | vertexShapes[v] = shape;
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| 120 | var width = (float)shape.Size.Width;
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| 121 | var height = (float)shape.Size.Height;
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| 122 | var x = (float)(rng.NextDouble() * (Chart.Size.Width - width));
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| 123 | var y = (float)(rng.NextDouble() * (Chart.Size.Height - height));
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| 124 | vertexRectangles[v] = new RectangleF(x, y, width, height);
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| 125 | }
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| 126 | layout = new ConstrainedForceDirectedLayout {
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| 127 | DefaultEdgeLength = IdealEdgeLength,
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| 128 | PerformEdgeRouting = PerformEdgeRouting,
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| 129 | LayoutWidth = (int)Chart.Size.Width,
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| 130 | LayoutHeight = (int)Chart.Size.Height,
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| 131 | MinHorizontalSpacing = 0,
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| 132 | MinVerticalSpacing = 0,
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| 133 | EdgeRoutingMode = RoutingMode
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| 134 | };
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| 135 |
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| 136 | var arcs = graph.Vertices.SelectMany(x => x.InArcs).ToList();
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| 137 | if (arcs.Count != graph.Arcs.Count())
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| 138 | throw new Exception("Arcs count does not match!");
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| 139 |
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| 140 | layout.Run(vertexRectangles);
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| 141 | var vertexPositions = layout.VertexPositions;
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| 142 | var arcRoutes = layout.ArcRoutes;
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| 143 |
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| 144 | var max = arcRoutes.Keys.Max(x => x.Weight);
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| 145 |
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| 146 | // move shapes to the positions computed by the layout
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| 147 | foreach (var pair in vertexPositions) {
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| 148 | var shape = vertexShapes[pair.Key];
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| 149 | var pos = vertexPositions[pair.Key];
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| 150 | shape.Move(new Offset(pos.X, pos.Y));
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| 151 | }
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[13874] | 152 | var colors = ColorGradient.GrayscaledColors;
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[13727] | 153 | foreach (var pair in arcRoutes) {
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| 154 | var arc = pair.Key;
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| 155 | var weight = arc.Weight;
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| 156 | var points = pair.Value;
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| 157 | var target = (LabeledPrimitive)vertexShapes[pair.Key.Target];
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| 158 | var len = points.Length; // len = 2 when no edge routingMode is performed
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| 159 | Pen pen;
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[13874] | 160 | var penWidth = weight / max * 3;
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| 161 | //var penColor = colors[(int)Math.Min(255, weight / max * 255)];
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| 162 | var penColor = Color.Black;
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[13727] | 163 | if (len == 2) {
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[13789] | 164 | if (double.IsInfinity(penWidth) || double.IsNaN(penWidth)) penWidth = 1;
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[13874] | 165 | pen = new Pen(penColor, (float)penWidth) { CustomEndCap = new AdjustableArrowCap(5, 3) };
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[13727] | 166 | var start = points[0];
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| 167 | var end = points[1];
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| 168 | var line = new Line(Chart, new PointD(start.X, start.Y), new PointD(end.X, end.Y));
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| 169 | var rect = target.Primitive as Rectangle;
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| 170 | var ell = target.Primitive as Ellipse;
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| 171 | PointD intersectionPoint;
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| 172 | if (rect != null)
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| 173 | intersectionPoint = rect.ComputeIntersect(line).FirstOrDefault();
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| 174 | else if (ell != null)
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| 175 | intersectionPoint = ell.ComputeIntersect(line).FirstOrDefault();
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| 176 | else
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| 177 | throw new InvalidOperationException("Unknown vertex shape.");
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| 178 | if (intersectionPoint == default(PointD))
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| 179 | intersectionPoint = end;
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[13789] | 180 | line = new Line(Chart, new PointD(start.X, start.Y), intersectionPoint, pen) { ToolTipText = arc.Label };
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[13727] | 181 | Chart.Group.Add(line);
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| 182 | arcShapes[arc] = line;
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| 183 | arcMap[line] = arc;
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| 184 | } else {
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| 185 | for (int i = 0; i < points.Length - 1; ++i) {
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| 186 | Line line;
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| 187 | var start = points[i];
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| 188 | var end = points[i + 1];
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| 189 |
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| 190 | var segment = new Line(Chart, new PointD(start.X, start.Y), new PointD(end.X, end.Y));
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| 191 | var rect = target.Primitive as Rectangle;
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| 192 | var ell = target.Primitive as Ellipse;
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| 193 |
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| 194 | PointD endPoint;
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| 195 | List<PointD> intersectionPoints;
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| 196 | if (rect != null) {
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| 197 | intersectionPoints = rect.ComputeIntersect(segment);
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| 198 | } else if (ell != null) {
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| 199 | intersectionPoints = ell.ComputeIntersect(segment);
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| 200 | } else {
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| 201 | throw new InvalidOperationException("Unknown vertex shape.");
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| 202 | }
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| 203 | if (intersectionPoints.Any()) {
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| 204 | endPoint = intersectionPoints.First();
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[13874] | 205 | pen = new Pen(penColor, (float)penWidth) { CustomEndCap = new AdjustableArrowCap(5, 3) };
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[13727] | 206 | } else {
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| 207 | endPoint = end;
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[13874] | 208 | pen = new Pen(penColor, (float)penWidth);
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[13727] | 209 | }
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[13789] | 210 | line = new Line(Chart, new PointD(start.X, start.Y), endPoint, pen) { ToolTipText = arc.Label };
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[13727] | 211 | Chart.Group.Add(line);
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| 212 | if (intersectionPoints.Any()) {
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| 213 | arcShapes[arc] = line;
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| 214 | arcMap[line] = arc;
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| 215 | break;
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| 216 | }
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| 217 | }
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| 218 | }
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| 219 | }
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| 220 | // draw vertex shapes after the arcs so they appear on top
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| 221 | foreach (var pair in vertexPositions) {
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| 222 | var shape = vertexShapes[pair.Key];
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| 223 | shape.RedrawRequired += ShapeRedrawRequired;
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| 224 | Chart.Group.Add(shape);
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| 225 | }
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| 226 | ResumeRendering();
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| 227 | }
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| 228 |
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| 229 | private void ShapeRedrawRequired(object sender, EventArgs args) {
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| 230 | layout.Run();
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| 231 | }
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| 232 |
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[13874] | 233 | private readonly Dictionary<Type, LabeledPrimitive> shapes;
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[13727] | 234 | public void AddShape(Type t, LabeledPrimitive shape) {
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| 235 | shapes[t] = shape;
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| 236 | }
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| 237 |
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| 238 | public void ClearShapes() {
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| 239 | shapes.Clear();
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| 240 | }
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| 241 |
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| 242 | private LabeledPrimitive CreateShape(IVertex v) {
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| 243 | var type = v.GetType();
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| 244 | if (!shapes.ContainsKey(type))
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| 245 | throw new ArgumentException(string.Format("No shape was associated with vertex type {0}", type));
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| 246 | var shape = shapes[type];
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| 247 | var p = shape.Primitive;
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| 248 | var rectangle = p as Rectangle;
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| 249 | var ellipse = p as Ellipse;
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| 250 | var brush = (SolidBrush)shape.Brush;
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| 251 |
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| 252 | if (rectangle != null) {
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| 253 | var r = new Rectangle(this.Chart, shape.LowerLeft, shape.UpperRight, new Pen(shape.Pen.Color), new SolidBrush(brush.Color));
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| 254 | return new LabeledPrimitive(r, v.Label, shape.Font);
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| 255 | }
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| 256 | if (ellipse != null) {
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| 257 | var e = new Ellipse(this.Chart, shape.LowerLeft, shape.UpperRight, new Pen(shape.Pen.Color), new SolidBrush(brush.Color));
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| 258 | return new LabeledPrimitive(e, v.Label, shape.Font);
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| 259 | }
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| 260 | throw new Exception(string.Format("Unknown shape {0}.", shape));
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| 261 | }
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| 262 | }
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| 263 | }
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