1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Drawing;
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4 | using System.Windows.Forms;
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5 | using HeuristicLab.Core;
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6 | using HeuristicLab.Visualization.Legend;
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7 | using HeuristicLab.Visualization.Options;
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8 |
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9 | namespace HeuristicLab.Visualization {
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10 | public partial class LineChart : ViewBase {
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11 | internal class LinesShape : WorldShape {}
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12 |
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13 | private readonly IChartDataRowsModel model;
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14 | private int maxDataRowCount;
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15 | private Boolean zoomFullView;
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16 | private double minDataValue;
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17 | private double maxDataValue;
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18 | private bool minMaxLineEnabled;
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19 | private MinMaxLineShape minMaxLineShape;
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20 | private IShape minLineShape;
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21 |
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22 | private readonly WorldShape root;
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23 | private readonly TextShape titleShape;
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24 | private readonly LinesShape linesShape;
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25 | private readonly LegendShape legendShape;
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26 |
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27 | private readonly XAxis xAxis;
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28 | private readonly YAxis yAxis;
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29 | private readonly Grid grid;
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30 |
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31 | /// <summary>
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32 | /// This constructor shouldn't be called. Only required for the designer.
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33 | /// </summary>
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34 | public LineChart() {
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35 | InitializeComponent();
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36 | }
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37 |
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38 | /// <summary>
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39 | /// Initializes the chart.
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40 | /// </summary>
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41 | /// <param name="model">Referenz to the model, for data</param>
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42 | public LineChart(IChartDataRowsModel model) : this() {
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43 | if (model == null) {
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44 | throw new NullReferenceException("Model cannot be null.");
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45 | }
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46 |
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47 | //TODO: correct Rectangle to fit
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48 |
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49 | root = new WorldShape();
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50 |
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51 | grid = new Grid();
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52 | minMaxLineEnabled = true;
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53 | root.AddShape(grid);
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54 |
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55 | linesShape = new LinesShape();
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56 | root.AddShape(linesShape);
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57 |
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58 | xAxis = new XAxis();
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59 | root.AddShape(xAxis);
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60 |
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61 | yAxis = new YAxis();
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62 | root.AddShape(yAxis);
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63 |
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64 | titleShape = new TextShape(0, 0, model.Title, 15);
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65 | root.AddShape(titleShape);
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66 |
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67 | minMaxLineShape = new MinMaxLineShape(this.minDataValue, this.maxDataValue, Color.Yellow, 4, DrawingStyle.Solid);
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68 | root.AddShape(minMaxLineShape);
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69 |
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70 | legendShape = new LegendShape();
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71 | root.AddShape(legendShape);
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72 |
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73 | canvas.MainCanvas.WorldShape = root;
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74 | canvas.Resize += delegate { UpdateLayout(); };
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75 |
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76 | UpdateLayout();
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77 | maxDataRowCount = 0;
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78 | this.model = model;
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79 | Item = model;
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80 |
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81 |
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82 | //The whole data rows are shown per default
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83 | ResetView();
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84 | }
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85 |
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86 | /// <summary>
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87 | /// Layout management - arranges the inner shapes.
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88 | /// </summary>
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89 | private void UpdateLayout() {
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90 | root.ClippingArea = new RectangleD(0, 0, canvas.Width, canvas.Height);
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91 |
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92 | titleShape.X = 10;
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93 | titleShape.Y = canvas.Height - 10;
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94 |
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95 | const int yAxisWidth = 100;
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96 | const int xAxisHeight = 20;
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97 |
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98 | linesShape.BoundingBox = new RectangleD(yAxisWidth,
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99 | xAxisHeight,
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100 | canvas.Width,
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101 | canvas.Height);
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102 |
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103 | grid.BoundingBox = linesShape.BoundingBox;
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104 |
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105 | minMaxLineShape.BoundingBox = linesShape.BoundingBox;
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106 |
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107 | yAxis.BoundingBox = new RectangleD(0,
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108 | linesShape.BoundingBox.Y1,
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109 | linesShape.BoundingBox.X1,
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110 | linesShape.BoundingBox.Y2);
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111 |
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112 | xAxis.BoundingBox = new RectangleD(linesShape.BoundingBox.X1,
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113 | 0,
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114 | linesShape.BoundingBox.X2,
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115 | linesShape.BoundingBox.Y1);
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116 |
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117 | legendShape.BoundingBox = new RectangleD(10, 10, 110, canvas.Height - 50);
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118 | legendShape.ClippingArea = new RectangleD(0, 0, legendShape.BoundingBox.Width,
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119 | legendShape.BoundingBox.Height);
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120 | }
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121 |
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122 | public void ResetView() {
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123 | zoomFullView = true;
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124 | ZoomToFullView();
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125 |
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126 | canvas.Invalidate();
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127 | }
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128 |
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129 | #region Add-/RemoveItemEvents
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130 |
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131 | protected override void AddItemEvents() {
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132 | base.AddItemEvents();
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133 |
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134 | model.DataRowAdded += OnDataRowAdded;
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135 | model.DataRowRemoved += OnDataRowRemoved;
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136 | model.ModelChanged += OnModelChanged;
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137 |
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138 | foreach (IDataRow row in model.Rows) {
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139 | OnDataRowAdded(row);
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140 | }
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141 | }
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142 |
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143 | protected override void RemoveItemEvents() {
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144 | base.RemoveItemEvents();
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145 |
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146 | model.DataRowAdded -= OnDataRowAdded;
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147 | model.DataRowRemoved -= OnDataRowRemoved;
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148 | model.ModelChanged -= OnModelChanged;
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149 | }
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150 |
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151 | private void OnDataRowAdded(IDataRow row) {
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152 | row.ValueChanged += OnRowValueChanged;
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153 | row.ValuesChanged += OnRowValuesChanged;
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154 | row.DataRowChanged += OnDataRowChanged;
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155 |
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156 | if (row.Count > maxDataRowCount) {
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157 | maxDataRowCount = row.Count;
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158 | }
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159 |
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160 | legendShape.AddLegendItem(new LegendItem(row.Label, row.Color, row.Thickness));
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161 | legendShape.CreateLegend();
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162 | InitLineShapes(row);
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163 | }
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164 |
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165 | private void ZoomToFullView() {
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166 | if (!zoomFullView) {
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167 | return;
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168 | }
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169 | RectangleD newClippingArea = new RectangleD(-0.1,
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170 | minDataValue - ((maxDataValue - minDataValue)*0.05),
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171 | maxDataRowCount - 0.9,
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172 | maxDataValue + ((maxDataValue - minDataValue)*0.05));
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173 |
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174 | SetLineClippingArea(newClippingArea);
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175 | historyStack.Push(newClippingArea);
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176 | }
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177 |
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178 | /// <summary>
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179 | /// Sets the clipping area of the data to display.
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180 | /// </summary>
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181 | /// <param name="clippingArea"></param>
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182 | private void SetLineClippingArea(RectangleD clippingArea) {
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183 | linesShape.ClippingArea = clippingArea;
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184 |
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185 | grid.ClippingArea = linesShape.ClippingArea;
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186 |
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187 | minMaxLineShape.ClippingArea = linesShape.ClippingArea;
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188 |
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189 | xAxis.ClippingArea = new RectangleD(linesShape.ClippingArea.X1,
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190 | xAxis.BoundingBox.Y1,
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191 | linesShape.ClippingArea.X2,
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192 | xAxis.BoundingBox.Y2);
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193 |
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194 | yAxis.ClippingArea = new RectangleD(yAxis.BoundingBox.X1,
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195 | linesShape.ClippingArea.Y1,
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196 | yAxis.BoundingBox.X2,
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197 | linesShape.ClippingArea.Y2);
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198 | }
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199 |
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200 | private void InitLineShapes(IDataRow row) {
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201 | List<LineShape> lineShapes = new List<LineShape>();
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202 | if (rowToLineShapes.Count == 0) {
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203 | minDataValue = Double.PositiveInfinity;
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204 | maxDataValue = Double.NegativeInfinity;
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205 | }
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206 | if (row.Count > 0) {
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207 | maxDataValue = Math.Max(row[0], maxDataValue);
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208 | minDataValue = Math.Min(row[0], minDataValue);
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209 | }
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210 | for (int i = 1; i < row.Count; i++) {
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211 | LineShape lineShape = new LineShape(i - 1, row[i - 1], i, row[i], row.Color, row.Thickness, row.Style);
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212 | lineShapes.Add(lineShape);
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213 | // TODO each DataRow needs its own WorldShape so Y Axes can be zoomed independently.
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214 | linesShape.AddShape(lineShape);
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215 | maxDataValue = Math.Max(row[i], maxDataValue);
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216 | minDataValue = Math.Min(row[i], minDataValue);
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217 | }
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218 | minMaxLineShape.YMax = maxDataValue;
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219 | minMaxLineShape.YMin = minDataValue;
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220 | rowToLineShapes[row] = lineShapes;
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221 | ZoomToFullView();
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222 |
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223 | canvas.Invalidate();
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224 | }
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225 |
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226 | private void OnDataRowRemoved(IDataRow row) {
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227 | row.ValueChanged -= OnRowValueChanged;
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228 | row.ValuesChanged -= OnRowValuesChanged;
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229 | row.DataRowChanged -= OnDataRowChanged;
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230 | }
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231 |
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232 | private readonly IDictionary<IDataRow, List<LineShape>> rowToLineShapes =
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233 | new Dictionary<IDataRow, List<LineShape>>();
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234 |
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235 | // TODO use action parameter
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236 | private void OnRowValueChanged(IDataRow row, double value, int index, Action action) {
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237 | List<LineShape> lineShapes = rowToLineShapes[row];
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238 | maxDataValue = Math.Max(value, maxDataValue);
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239 | minDataValue = Math.Min(value, minDataValue);
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240 | minMaxLineShape.YMax = maxDataValue;
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241 | minMaxLineShape.YMin = minDataValue;
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242 | if (index > lineShapes.Count + 1) {
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243 | throw new NotImplementedException();
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244 | }
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245 |
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246 | // new value was added
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247 | if (index > 0 && index == lineShapes.Count + 1) {
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248 | if (maxDataRowCount < row.Count) {
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249 | maxDataRowCount = row.Count;
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250 | }
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251 | LineShape lineShape = new LineShape(index - 1, row[index - 1], index, row[index], row.Color, row.Thickness,
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252 | row.Style);
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253 | lineShapes.Add(lineShape);
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254 | // TODO each DataRow needs its own WorldShape so Y Axes can be zoomed independently.
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255 | linesShape.AddShape(lineShape);
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256 | }
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257 |
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258 | // not the first value
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259 | if (index > 0) {
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260 | lineShapes[index - 1].Y2 = value;
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261 | }
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262 |
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263 | // not the last value
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264 | if (index > 0 && index < row.Count - 1) {
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265 | lineShapes[index].Y1 = value;
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266 | }
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267 | ZoomToFullView();
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268 |
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269 | canvas.Invalidate();
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270 | }
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271 |
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272 |
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273 | public IList<IDataRow> GetRows() {
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274 | return model.Rows;
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275 | }
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276 |
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277 |
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278 | // TODO use action parameter
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279 | private void OnRowValuesChanged(IDataRow row, double[] values, int index, Action action) {
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280 | foreach (double value in values) {
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281 | OnRowValueChanged(row, value, index++, action);
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282 | }
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283 | }
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284 |
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285 | private void OnModelChanged() {
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286 | titleShape.Text = model.Title;
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287 |
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288 | Invalidate();
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289 | }
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290 |
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291 | #endregion
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292 |
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293 | #region Begin-/EndUpdate
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294 |
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295 | private int beginUpdateCount = 0;
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296 |
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297 | public void BeginUpdate() {
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298 | beginUpdateCount++;
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299 | }
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300 |
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301 | public void EndUpdate() {
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302 | if (beginUpdateCount == 0) {
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303 | throw new InvalidOperationException("Too many EndUpdates.");
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304 | }
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305 |
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306 | beginUpdateCount--;
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307 |
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308 | if (beginUpdateCount == 0) {
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309 | canvas.Invalidate();
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310 | }
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311 | }
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312 |
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313 | #endregion
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314 |
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315 | #region Zooming / Panning
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316 |
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317 | private readonly Stack<RectangleD> historyStack = new Stack<RectangleD>();
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318 | private RectangleShape rectangleShape;
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319 |
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320 | private void canvasUI1_KeyDown(object sender, KeyEventArgs e) {
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321 | if (e.KeyCode == Keys.Back && historyStack.Count > 1) {
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322 | historyStack.Pop();
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323 |
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324 | RectangleD clippingArea = historyStack.Peek();
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325 |
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326 | SetNewClippingArea(clippingArea);
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327 | canvas.Invalidate();
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328 | }
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329 | }
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330 |
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331 | private void canvasUI1_MouseDown(object sender, MouseEventArgs e) {
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332 | Focus();
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333 | if (e.Button == MouseButtons.Right) {
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334 |
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335 | this.contextMenuStrip1.Show(PointToScreen(e.Location));
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336 |
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337 | }
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338 | else {
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339 | if (ModifierKeys == Keys.Control) {
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340 | CreateZoomListener(e);
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341 | }
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342 | else {
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343 | CreatePanListener(e);
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344 | }
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345 | }
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346 | }
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347 |
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348 | private void canvasUI1_MouseWheel(object sender, MouseEventArgs e) {
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349 | if (ModifierKeys == Keys.Control) {
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350 | double zoomFactor = (e.Delta > 0) ? 0.9 : 1.1;
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351 |
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352 | RectangleD clippingArea = ZoomListener.ZoomClippingArea(linesShape.ClippingArea, zoomFactor);
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353 |
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354 | SetLineClippingArea(clippingArea);
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355 | canvas.Invalidate();
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356 | }
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357 | }
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358 |
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359 | private void CreateZoomListener(MouseEventArgs e) {
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360 | ZoomListener zoomListener = new ZoomListener(e.Location);
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361 | zoomListener.DrawRectangle += DrawRectangle;
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362 | zoomListener.OnMouseUp += OnZoom_MouseUp;
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363 |
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364 | canvas.MouseEventListener = zoomListener;
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365 |
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366 | rectangleShape = new RectangleShape(e.X, e.Y, e.X, e.Y, Color.Blue);
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367 | rectangleShape.Opacity = 50;
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368 |
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369 | linesShape.AddShape(rectangleShape);
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370 | }
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371 |
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372 | private void OnZoom_MouseUp(object sender, MouseEventArgs e) {
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373 | canvas.MouseEventListener = null;
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374 |
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375 | RectangleD clippingArea = rectangleShape.Rectangle;
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376 |
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377 | SetLineClippingArea(clippingArea);
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378 | historyStack.Push(clippingArea);
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379 |
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380 | linesShape.RemoveShape(rectangleShape);
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381 |
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382 | zoomFullView = false; //user wants to zoom => no full view
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383 |
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384 | canvas.Invalidate();
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385 | }
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386 |
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387 | private void DrawRectangle(Rectangle rectangle) {
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388 | rectangleShape.Rectangle = Transform.ToWorld(rectangle, canvas.ClientRectangle, linesShape.ClippingArea);
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389 | canvas.Invalidate();
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390 | }
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391 |
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392 | private void CreatePanListener(MouseEventArgs e) {
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393 | PanListener panListener = new PanListener(canvas.ClientRectangle, linesShape.ClippingArea, e.Location);
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394 |
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395 | panListener.SetNewClippingArea += SetNewClippingArea;
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396 | panListener.OnMouseUp += delegate {
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397 | historyStack.Push(linesShape.ClippingArea);
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398 | canvas.MouseEventListener = null;
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399 | };
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400 |
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401 | canvas.MouseEventListener = panListener;
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402 | }
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403 |
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404 | private void SetNewClippingArea(RectangleD newClippingArea) {
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405 | SetLineClippingArea(newClippingArea);
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406 |
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407 | zoomFullView = false;
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408 | canvas.Invalidate();
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409 | }
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410 |
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411 | #endregion
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412 |
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413 | private void optionsToolStripMenuItem_Click(object sender, EventArgs e) {
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414 | OptionsDialog optionsdlg = new OptionsDialog(this);
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415 | optionsdlg.ShowDialog(this);
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416 | }
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417 |
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418 | public void OnDataRowChanged(IDataRow row) {
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419 | foreach (LineShape ls in rowToLineShapes[row]) {
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420 | ls.LSColor = row.Color;
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421 | ls.LSThickness = row.Thickness;
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422 | ls.LSDrawingStyle = row.Style;
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423 | }
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424 | canvas.Invalidate();
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425 | }
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426 | }
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427 | }
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