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 |
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7 | namespace HeuristicLab.Visualization {
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8 | public partial class LineChart : ViewBase {
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9 | private readonly IChartDataRowsModel model;
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10 | private int maxDataRowCount;
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11 | private Boolean zoomFullView;
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12 | private double minDataValue;
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13 | private double maxDataValue;
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14 |
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15 | private readonly WorldShape root;
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16 | private readonly XAxis xAxis;
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17 |
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18 | /// <summary>
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19 | /// This constructor shouldn't be called. Only required for the designer.
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20 | /// </summary>
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21 | public LineChart() {
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22 | InitializeComponent();
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23 | }
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24 |
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25 | /// <summary>
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26 | /// Initializes the chart.
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27 | /// </summary>
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28 | /// <param name="model">Referenz to the model, for data</param>
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29 | public LineChart(IChartDataRowsModel model) : this() {
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30 | if (model == null) {
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31 | throw new NullReferenceException("Model cannot be null.");
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32 | }
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33 |
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34 | //TODO: correct Rectangle to fit
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35 | RectangleD clientRectangle = new RectangleD(-1, -1, 1, 1);
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36 |
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37 | root = new WorldShape(clientRectangle, clientRectangle);
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38 |
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39 | xAxis = new XAxis();
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40 | root.AddShape(xAxis);
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41 |
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42 | canvasUI1.MainCanvas.WorldShape = root;
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43 |
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44 | CreateMouseEventListeners();
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45 |
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46 | this.model = model;
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47 | Item = model;
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48 | maxDataRowCount = 0;
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49 | //The whole data rows are shown per default
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50 | zoomFullView = true;
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51 | minDataValue = Double.PositiveInfinity;
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52 | maxDataValue = Double.NegativeInfinity;
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53 | }
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54 |
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55 | public void ResetView() {
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56 | zoomFullView = true;
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57 | ZoomToFullView();
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58 | canvasUI1.Invalidate();
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59 | }
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60 |
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61 | #region Add-/RemoveItemEvents
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62 |
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63 | protected override void AddItemEvents() {
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64 | base.AddItemEvents();
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65 |
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66 | model.DataRowAdded += OnDataRowAdded;
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67 | model.DataRowRemoved += OnDataRowRemoved;
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68 | model.ModelChanged += OnModelChanged;
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69 |
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70 | foreach (IDataRow row in model.Rows) {
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71 | OnDataRowAdded(row);
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72 | }
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73 | }
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74 |
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75 | protected override void RemoveItemEvents() {
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76 | base.RemoveItemEvents();
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77 |
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78 | model.DataRowAdded -= OnDataRowAdded;
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79 | model.DataRowRemoved -= OnDataRowRemoved;
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80 | model.ModelChanged -= OnModelChanged;
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81 | }
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82 |
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83 | private void OnDataRowAdded(IDataRow row) {
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84 | row.ValueChanged += OnRowValueChanged;
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85 | row.ValuesChanged += OnRowValuesChanged;
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86 | if (row.Count > maxDataRowCount)
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87 | maxDataRowCount = row.Count;
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88 |
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89 | InitLineShapes(row);
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90 | InitXAxis();
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91 | }
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92 |
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93 | private void InitXAxis() {
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94 | int numLabels = 0;
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95 |
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96 | foreach (IDataRow row in model.Rows) {
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97 | numLabels = Math.Max(numLabels, row.Count);
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98 | }
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99 |
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100 | xAxis.ClearLabels();
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101 |
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102 | for (int i = 0; i < numLabels; i++) {
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103 | xAxis.SetLabel(i, i.ToString());
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104 | }
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105 | }
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106 |
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107 | private void ZoomToFullView() {
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108 | if(!zoomFullView)
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109 | return;
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110 | RectangleD newClippingArea = new RectangleD(-0.1,
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111 | minDataValue-((maxDataValue-minDataValue)*0.05),
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112 | maxDataRowCount-0.9,
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113 | maxDataValue + ((maxDataValue - minDataValue) * 0.05));
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114 | root.ClippingArea = newClippingArea;
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115 | }
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116 |
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117 | private void InitLineShapes(IDataRow row) {
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118 | List<LineShape> lineShapes = new List<LineShape>();
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119 | if (row.Count > 0) {
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120 | maxDataValue = Math.Max(row[0], this.maxDataValue);
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121 | minDataValue = Math.Min(row[0], minDataValue);
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122 | }
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123 | for (int i = 1; i < row.Count; i++) {
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124 | LineShape lineShape = new LineShape(i - 1, row[i - 1], i, row[i], 0, row.Color, row.Thickness, row.Style);
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125 | lineShapes.Add(lineShape);
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126 | // TODO each DataRow needs its own WorldShape so Y Axes can be zoomed independently.
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127 | root.AddShape(lineShape);
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128 | maxDataValue = Math.Max(row[i], maxDataValue);
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129 | minDataValue = Math.Min(row[i], minDataValue);
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130 | }
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131 |
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132 | rowToLineShapes[row] = lineShapes;
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133 | ZoomToFullView();
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134 | canvasUI1.Invalidate();
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135 | }
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136 |
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137 | private void OnDataRowRemoved(IDataRow row) {
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138 | row.ValueChanged -= OnRowValueChanged;
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139 | row.ValuesChanged -= OnRowValuesChanged;
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140 | }
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141 |
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142 | private readonly IDictionary<IDataRow, List<LineShape>> rowToLineShapes = new Dictionary<IDataRow, List<LineShape>>();
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143 |
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144 | // TODO use action parameter
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145 | private void OnRowValueChanged(IDataRow row, double value, int index, Action action) {
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146 | xAxis.SetLabel(index, index.ToString());
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147 |
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148 | List<LineShape> lineShapes = rowToLineShapes[row];
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149 | maxDataValue = Math.Max(value, maxDataValue);
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150 | minDataValue = Math.Min(value, minDataValue);
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151 |
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152 | if (index > lineShapes.Count + 1) {
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153 | throw new NotImplementedException();
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154 | }
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155 |
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156 | // new value was added
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157 | if (index > 0 && index == lineShapes.Count + 1) {
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158 | if (maxDataRowCount < row.Count)
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159 | maxDataRowCount = row.Count;
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160 | LineShape lineShape = new LineShape(index - 1, row[index - 1], index, row[index], 0, row.Color, row.Thickness, row.Style);
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161 | lineShapes.Add(lineShape);
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162 | // TODO each DataRow needs its own WorldShape so Y Axes can be zoomed independently.
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163 | root.AddShape(lineShape);
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164 | }
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165 |
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166 | // not the first value
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167 | if (index > 0) {
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168 | lineShapes[index - 1].Y2 = value;
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169 | }
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170 |
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171 | // not the last value
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172 | if (index > 0 && index < row.Count - 1) {
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173 | lineShapes[index].Y1 = value;
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174 | }
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175 | ZoomToFullView();
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176 | canvasUI1.Invalidate();
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177 | }
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178 |
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179 | // TODO use action parameter
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180 | private void OnRowValuesChanged(IDataRow row, double[] values, int index, Action action) {
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181 | foreach (double value in values) {
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182 | OnRowValueChanged(row, value, index++, action);
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183 | }
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184 | }
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185 |
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186 | private void OnModelChanged() {
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187 | InitXAxis();
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188 | }
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189 |
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190 | #endregion
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191 |
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192 | #region Begin-/EndUpdate
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193 |
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194 | private int beginUpdateCount = 0;
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195 |
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196 | public void BeginUpdate() {
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197 | beginUpdateCount++;
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198 | }
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199 |
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200 | public void EndUpdate() {
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201 | if (beginUpdateCount == 0) {
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202 | throw new InvalidOperationException("Too many EndUpdates.");
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203 | }
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204 |
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205 | beginUpdateCount--;
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206 |
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207 | if (beginUpdateCount == 0) {
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208 | Invalidate();
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209 | }
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210 | }
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211 |
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212 | #endregion
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213 |
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214 | private MouseEventListener panListener;
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215 | private MouseEventListener zoomListener;
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216 |
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217 | private void CreateMouseEventListeners() {
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218 | panListener = new MouseEventListener();
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219 | panListener.OnMouseMove += Pan_OnMouseMove;
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220 | panListener.OnMouseUp += Pan_OnMouseUp;
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221 |
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222 | zoomListener = new MouseEventListener();
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223 | zoomListener.OnMouseMove += Zoom_OnMouseMove;
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224 | zoomListener.OnMouseUp += Zoom_OnMouseUp;
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225 | }
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226 |
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227 | private RectangleD startClippingArea;
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228 |
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229 | private void canvasUI1_MouseDown(object sender, MouseEventArgs e) {
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230 | if (ModifierKeys == Keys.Control) {
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231 | zoomListener.StartPoint = e.Location;
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232 | canvasUI1.MouseEventListener = zoomListener;
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233 |
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234 | r = Rectangle.Empty;
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235 | rectangleShape = new RectangleShape(e.X, e.Y, e.X, e.Y, 1000, Color.Blue);
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236 | rectangleShape.Opacity = 50;
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237 |
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238 | root.AddShape(rectangleShape);
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239 | } else {
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240 | panListener.StartPoint = e.Location;
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241 | canvasUI1.MouseEventListener = panListener;
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242 |
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243 | startClippingArea = root.ClippingArea;
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244 | }
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245 | }
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246 |
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247 | private void Pan_OnMouseUp(Point startPoint, Point actualPoint) {
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248 | canvasUI1.MouseEventListener = null;
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249 | }
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250 |
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251 | private void Pan_OnMouseMove(Point startPoint, Point actualPoint) {
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252 | Rectangle viewPort = canvasUI1.ClientRectangle;
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253 |
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254 | PointD worldStartPoint = Transform.ToWorld(startPoint, viewPort, startClippingArea);
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255 | PointD worldActualPoint = Transform.ToWorld(actualPoint, viewPort, startClippingArea);
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256 |
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257 | double xDiff = worldActualPoint.X - worldStartPoint.X;
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258 | double yDiff = worldActualPoint.Y - worldStartPoint.Y;
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259 |
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260 | RectangleD newClippingArea = new RectangleD();
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261 | newClippingArea.X1 = startClippingArea.X1 - xDiff;
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262 | newClippingArea.X2 = startClippingArea.X2 - xDiff;
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263 | newClippingArea.Y1 = startClippingArea.Y1 - yDiff;
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264 | newClippingArea.Y2 = startClippingArea.Y2 - yDiff;
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265 |
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266 | root.ClippingArea = newClippingArea;
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267 | panListener.StartPoint = startPoint;
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268 |
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269 | zoomFullView = false; //user wants to pan => no full view
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270 |
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271 | canvasUI1.Invalidate();
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272 | }
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273 |
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274 | private void Zoom_OnMouseUp(Point startPoint, Point actualPoint) {
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275 | canvasUI1.MouseEventListener = null;
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276 |
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277 | RectangleD newClippingArea = Transform.ToWorld(r, canvasUI1.ClientRectangle, root.ClippingArea);
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278 | root.ClippingArea = newClippingArea;
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279 | root.RemoveShape(rectangleShape);
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280 |
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281 | zoomFullView = false; //user wants to pan => no full view
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282 |
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283 | canvasUI1.Invalidate();
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284 | }
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285 |
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286 | private Rectangle r;
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287 | private RectangleShape rectangleShape;
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288 |
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289 | private void Zoom_OnMouseMove(Point startPoint, Point actualPoint) {
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290 | r = new Rectangle();
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291 |
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292 | if (startPoint.X < actualPoint.X) {
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293 | r.X = startPoint.X;
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294 | r.Width = actualPoint.X - startPoint.X;
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295 | } else {
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296 | r.X = actualPoint.X;
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297 | r.Width = startPoint.X - actualPoint.X;
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298 | }
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299 |
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300 | if (startPoint.Y < actualPoint.Y) {
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301 | r.Y = startPoint.Y;
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302 | r.Height = actualPoint.Y - startPoint.Y;
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303 | } else {
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304 | r.Y = actualPoint.Y;
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305 | r.Height = startPoint.Y - actualPoint.Y;
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306 | }
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307 |
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308 | rectangleShape.Rectangle = Transform.ToWorld(r, canvasUI1.ClientRectangle, root.ClippingArea);
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309 | canvasUI1.Invalidate();
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310 | }
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311 | }
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312 | }
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