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 | private readonly IChartDataRowsModel model;
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12 | private readonly Canvas canvas;
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13 |
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14 | private readonly TextShape titleShape = new TextShape("Title");
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15 | private readonly LegendShape legendShape = new LegendShape();
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16 | private readonly XAxis xAxis = new XAxis();
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17 | private readonly List<RowEntry> rowEntries = new List<RowEntry>();
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18 |
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19 | private readonly Dictionary<IDataRow, RowEntry> rowToRowEntry = new Dictionary<IDataRow, RowEntry>();
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20 |
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21 | // private readonly Stack<RectangleD> clippingAreaHistory = new Stack<RectangleD>();
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22 | private readonly WorldShape userInteractionShape = new WorldShape();
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23 | private readonly RectangleShape rectangleShape = new RectangleShape(0, 0, 0, 0, Color.FromArgb(50, 0, 0, 255));
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24 | private IMouseEventListener mouseEventListener;
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25 |
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26 | private const int YAxisWidth = 100;
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27 | private const int XAxisHeight = 20;
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28 |
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29 | private bool zoomToFullView;
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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 | canvas = canvasUI.Canvas;
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48 |
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49 | this.model = model;
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50 |
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51 | Item = model;
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52 |
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53 | UpdateLayout();
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54 | canvasUI.Resize += delegate { UpdateLayout(); };
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55 |
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56 | ZoomToFullView();
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57 | }
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58 |
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59 | /// <summary>
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60 | /// Layout management - arranges the inner shapes.
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61 | /// </summary>
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62 | private void UpdateLayout() {
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63 | canvas.ClearShapes();
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64 |
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65 | foreach (RowEntry rowEntry in rowEntries) {
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66 | canvas.AddShape(rowEntry.Grid);
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67 | }
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68 |
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69 | foreach (RowEntry rowEntry in rowEntries) {
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70 | canvas.AddShape(rowEntry.LinesShape);
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71 | }
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72 |
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73 | canvas.AddShape(xAxis);
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74 |
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75 | foreach (RowEntry rowEntry in rowEntries) {
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76 | canvas.AddShape(rowEntry.YAxis);
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77 | }
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78 |
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79 | canvas.AddShape(titleShape);
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80 | canvas.AddShape(legendShape);
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81 |
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82 | canvas.AddShape(userInteractionShape);
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83 |
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84 | titleShape.X = 10;
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85 | titleShape.Y = canvasUI.Height - 10;
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86 |
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87 | int yAxesWidth = 0;
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88 |
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89 | foreach (RowEntry rowEntry in rowEntries) {
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90 | if (rowEntry.YAxis.Visible) {
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91 | yAxesWidth += YAxisWidth;
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92 | }
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93 | }
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94 |
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95 | RectangleD linesAreaBoundingBox = new RectangleD(yAxesWidth,
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96 | XAxisHeight,
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97 | canvasUI.Width,
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98 | canvasUI.Height);
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99 |
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100 | foreach (RowEntry rowEntry in rowEntries) {
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101 | rowEntry.LinesShape.BoundingBox = linesAreaBoundingBox;
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102 | rowEntry.Grid.BoundingBox = linesAreaBoundingBox;
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103 | }
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104 |
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105 | int yAxisLeft = 0;
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106 | foreach (RowEntry rowEntry in rowEntries) {
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107 | rowEntry.YAxis.BoundingBox = new RectangleD(yAxisLeft,
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108 | linesAreaBoundingBox.Y1,
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109 | yAxisLeft + YAxisWidth,
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110 | linesAreaBoundingBox.Y2);
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111 | yAxisLeft += YAxisWidth;
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112 | }
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113 |
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114 | userInteractionShape.BoundingBox = linesAreaBoundingBox;
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115 | userInteractionShape.ClippingArea = new RectangleD(0, 0, userInteractionShape.BoundingBox.Width, userInteractionShape.BoundingBox.Height);
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116 |
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117 | xAxis.BoundingBox = new RectangleD(linesAreaBoundingBox.X1,
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118 | 0,
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119 | linesAreaBoundingBox.X2,
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120 | linesAreaBoundingBox.Y1);
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121 |
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122 | legendShape.BoundingBox = new RectangleD(10, 10, 110, canvasUI.Height - 50);
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123 | legendShape.ClippingArea = new RectangleD(0, 0, legendShape.BoundingBox.Width,
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124 | legendShape.BoundingBox.Height);
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125 |
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126 | canvasUI.Invalidate();
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127 | }
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128 |
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129 | private void optionsToolStripMenuItem_Click(object sender, EventArgs e) {
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130 | OptionsDialog optionsdlg = new OptionsDialog(this.model);
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131 | optionsdlg.ShowDialog(this);
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132 | }
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133 |
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134 | public void OnDataRowChanged(IDataRow row) {
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135 | RowEntry rowEntry = rowToRowEntry[row];
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136 |
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137 | rowEntry.LinesShape.UpdateStyle(row);
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138 |
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139 | canvasUI.Invalidate();
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140 | }
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141 |
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142 | #region Add-/RemoveItemEvents
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143 |
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144 | protected override void AddItemEvents() {
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145 | base.AddItemEvents();
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146 |
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147 | model.DataRowAdded += OnDataRowAdded;
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148 | model.DataRowRemoved += OnDataRowRemoved;
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149 | model.ModelChanged += OnModelChanged;
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150 |
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151 | foreach (IDataRow row in model.Rows) {
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152 | OnDataRowAdded(row);
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153 | }
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154 | }
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155 |
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156 | protected override void RemoveItemEvents() {
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157 | base.RemoveItemEvents();
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158 |
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159 | model.DataRowAdded -= OnDataRowAdded;
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160 | model.DataRowRemoved -= OnDataRowRemoved;
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161 | model.ModelChanged -= OnModelChanged;
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162 | }
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163 |
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164 | private void OnDataRowAdded(IDataRow row) {
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165 | row.ValueChanged += OnRowValueChanged;
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166 | row.ValuesChanged += OnRowValuesChanged;
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167 | row.DataRowChanged += OnDataRowChanged;
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168 |
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169 | legendShape.AddLegendItem(new LegendItem(row.Label, row.Color, row.Thickness));
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170 | legendShape.CreateLegend();
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171 |
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172 | InitLineShapes(row);
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173 |
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174 | UpdateLayout();
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175 | }
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176 |
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177 | private void OnDataRowRemoved(IDataRow row) {
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178 | row.ValueChanged -= OnRowValueChanged;
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179 | row.ValuesChanged -= OnRowValuesChanged;
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180 | row.DataRowChanged -= OnDataRowChanged;
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181 |
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182 | rowToRowEntry.Remove(row);
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183 | rowEntries.RemoveAll(delegate(RowEntry rowEntry) { return rowEntry.DataRow == row; });
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184 |
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185 | UpdateLayout();
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186 | }
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187 |
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188 | #endregion
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189 |
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190 | public void ZoomToFullView() {
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191 | SetClipX(-0.1, model.MaxDataRowValues - 0.9);
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192 |
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193 | foreach (RowEntry rowEntry in rowEntries) {
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194 | IDataRow row = rowEntry.DataRow;
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195 |
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196 | SetClipY(rowEntry,
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197 | row.MinValue - ((row.MaxValue - row.MinValue)*0.05),
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198 | row.MaxValue + ((row.MaxValue - row.MinValue)*0.05));
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199 | }
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200 |
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201 | zoomToFullView = true;
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202 |
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203 | canvasUI.Invalidate();
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204 | }
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205 |
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206 | private void SetClipX(double x1, double x2) {
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207 | xAxis.ClippingArea = new RectangleD(x1,
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208 | 0,
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209 | x2,
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210 | XAxisHeight);
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211 |
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212 | foreach (RowEntry rowEntry in rowEntries) {
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213 | rowEntry.LinesShape.ClippingArea = new RectangleD(x1,
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214 | rowEntry.LinesShape.ClippingArea.Y1,
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215 | x2,
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216 | rowEntry.LinesShape.ClippingArea.Y2);
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217 | rowEntry.Grid.ClippingArea = new RectangleD(x1,
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218 | rowEntry.Grid.ClippingArea.Y1,
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219 | x2,
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220 | rowEntry.Grid.ClippingArea.Y2);
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221 | rowEntry.YAxis.ClippingArea = new RectangleD(0,
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222 | rowEntry.YAxis.ClippingArea.Y1,
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223 | YAxisWidth,
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224 | rowEntry.YAxis.ClippingArea.Y2);
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225 | }
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226 | }
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227 |
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228 | private static void SetClipY(RowEntry rowEntry, double y1, double y2) {
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229 | rowEntry.LinesShape.ClippingArea = new RectangleD(rowEntry.LinesShape.ClippingArea.X1,
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230 | y1,
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231 | rowEntry.LinesShape.ClippingArea.X2,
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232 | y2);
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233 | rowEntry.Grid.ClippingArea = new RectangleD(rowEntry.Grid.ClippingArea.X1,
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234 | y1,
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235 | rowEntry.Grid.ClippingArea.X2,
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236 | y2);
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237 | rowEntry.YAxis.ClippingArea = new RectangleD(rowEntry.YAxis.ClippingArea.X1,
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238 | y1,
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239 | rowEntry.YAxis.ClippingArea.X2,
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240 | y2);
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241 | }
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242 |
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243 | private void InitLineShapes(IDataRow row) {
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244 | RowEntry rowEntry = new RowEntry(row);
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245 | rowEntries.Add(rowEntry);
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246 | rowToRowEntry[row] = rowEntry;
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247 |
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248 | if ((row.LineType == DataRowType.SingleValue)) {
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249 | if (row.Count > 0) {
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250 | LineShape lineShape = new HorizontalLineShape(0, row[0], double.MaxValue, row[0], row.Color, row.Thickness,
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251 | row.Style);
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252 | rowEntry.LinesShape.AddShape(lineShape);
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253 | }
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254 | } else {
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255 | for (int i = 1; i < row.Count; i++) {
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256 | LineShape lineShape = new LineShape(i - 1, row[i - 1], i, row[i], row.Color, row.Thickness, row.Style);
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257 | rowEntry.LinesShape.AddShape(lineShape);
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258 | }
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259 | }
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260 |
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261 | ZoomToFullView();
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262 | }
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263 |
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264 | private void OnRowValueChanged(IDataRow row, double value, int index, Action action) {
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265 | RowEntry rowEntry = rowToRowEntry[row];
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266 |
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267 | if (row.LineType == DataRowType.SingleValue) {
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268 | if (action == Action.Added) {
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269 | LineShape lineShape = new HorizontalLineShape(0, row[0], double.MaxValue, row[0], row.Color, row.Thickness,
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270 | row.Style);
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271 | rowEntry.LinesShape.AddShape(lineShape);
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272 | } else {
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273 | LineShape lineShape = rowEntry.LinesShape.GetShape(0);
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274 | lineShape.Y1 = value;
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275 | lineShape.Y2 = value;
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276 | }
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277 | } else {
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278 | if (index > rowEntry.LinesShape.Count + 1) {
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279 | throw new NotImplementedException();
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280 | }
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281 |
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282 | // new value was added
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283 | if (index > 0 && index == rowEntry.LinesShape.Count + 1) {
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284 | LineShape lineShape = new LineShape(index - 1, row[index - 1], index, row[index], row.Color, row.Thickness, row.Style);
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285 | rowEntry.LinesShape.AddShape(lineShape);
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286 | }
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287 |
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288 | // not the first value
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289 | if (index > 0) {
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290 | rowEntry.LinesShape.GetShape(index - 1).Y2 = value;
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291 | }
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292 |
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293 | // not the last value
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294 | if (index > 0 && index < row.Count - 1) {
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295 | rowEntry.LinesShape.GetShape(index).Y1 = value;
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296 | }
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297 | }
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298 |
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299 | ZoomToFullView();
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300 | }
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301 |
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302 | private void OnRowValuesChanged(IDataRow row, double[] values, int index, Action action) {
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303 | foreach (double value in values) {
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304 | OnRowValueChanged(row, value, index++, action);
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305 | }
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306 | }
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307 |
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308 | private void OnModelChanged() {
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309 | titleShape.Text = model.Title;
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310 |
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311 | canvasUI.Invalidate();
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312 | }
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313 |
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314 | #region Begin-/EndUpdate
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315 |
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316 | private int beginUpdateCount;
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317 |
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318 | public void BeginUpdate() {
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319 | beginUpdateCount++;
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320 | }
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321 |
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322 | public void EndUpdate() {
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323 | if (beginUpdateCount == 0) {
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324 | throw new InvalidOperationException("Too many EndUpdates.");
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325 | }
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326 |
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327 | beginUpdateCount--;
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328 |
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329 | if (beginUpdateCount == 0) {
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330 | canvasUI.Invalidate();
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331 | }
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332 | }
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333 |
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334 | #endregion
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335 |
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336 | #region Zooming / Panning
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337 |
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338 | private void Pan(Point startPoint, Point endPoint) {
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339 | zoomToFullView = false;
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340 |
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341 | foreach (RowEntry rowEntry in rowEntries) {
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342 | RectangleD clippingArea = CalcPanClippingArea(startPoint, endPoint, rowEntry.LinesShape);
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343 |
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344 | SetClipX(clippingArea.X1, clippingArea.X1);
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345 | SetClipY(rowEntry, clippingArea.Y1, clippingArea.Y2);
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346 | }
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347 |
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348 | canvasUI.Invalidate();
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349 | }
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350 |
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351 | private void PanEnd(Point startPoint, Point endPoint) {
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352 | zoomToFullView = false;
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353 |
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354 | foreach (RowEntry rowEntry in rowEntries) {
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355 | RectangleD clippingArea = CalcPanClippingArea(startPoint, endPoint, rowEntry.LinesShape);
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356 |
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357 | SetClipX(clippingArea.X1, clippingArea.X1);
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358 | SetClipY(rowEntry, clippingArea.Y1, clippingArea.Y2);
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359 | }
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360 |
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361 | canvasUI.Invalidate();
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362 | }
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363 |
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364 | private static RectangleD CalcPanClippingArea(Point startPoint, Point endPoint, LinesShape linesShape) {
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365 | return Translate.ClippingArea(startPoint, endPoint, linesShape.ClippingArea, linesShape.Viewport);
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366 | }
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367 |
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368 | private void SetClippingArea(Rectangle rectangle) {
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369 | foreach (RowEntry rowEntry in rowEntries) {
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370 | RectangleD clippingArea = Transform.ToWorld(rectangle, rowEntry.LinesShape.Viewport, rowEntry.LinesShape.ClippingArea);
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371 |
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372 | SetClipX(clippingArea.X1, clippingArea.X1);
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373 | SetClipY(rowEntry, clippingArea.Y1, clippingArea.Y2);
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374 | }
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375 |
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376 | userInteractionShape.RemoveShape(rectangleShape);
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377 | canvasUI.Invalidate();
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378 | }
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379 |
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380 | private void DrawRectangle(Rectangle rectangle) {
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381 | rectangleShape.Rectangle = Transform.ToWorld(rectangle, userInteractionShape.Viewport, userInteractionShape.ClippingArea);
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382 | canvasUI.Invalidate();
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383 | }
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384 |
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385 | private void canvasUI1_KeyDown(object sender, KeyEventArgs e) {
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386 | // if (e.KeyCode == Keys.Back && clippingAreaHistory.Count > 1) {
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387 | // clippingAreaHistory.Pop();
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388 | //
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389 | // RectangleD clippingArea = clippingAreaHistory.Peek();
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390 | //
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391 | // SetLineClippingArea(clippingArea, false);
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392 | // }
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393 | }
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394 |
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395 | private void canvasUI1_MouseDown(object sender, MouseEventArgs e) {
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396 | Focus();
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397 |
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398 | if (e.Button == MouseButtons.Right) {
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399 | contextMenuStrip1.Show(PointToScreen(e.Location));
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400 | } else if (e.Button == MouseButtons.Left) {
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401 | if (ModifierKeys == Keys.None) {
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402 | PanListener panListener = new PanListener(e.Location);
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403 | panListener.Pan += Pan;
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404 | panListener.PanEnd += PanEnd;
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405 |
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406 | mouseEventListener = panListener;
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407 | } else if (ModifierKeys == Keys.Control) {
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408 | ZoomListener zoomListener = new ZoomListener(e.Location);
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409 | zoomListener.DrawRectangle += DrawRectangle;
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410 | zoomListener.SetClippingArea += SetClippingArea;
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411 |
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412 | rectangleShape.Rectangle = RectangleD.Empty;
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413 | userInteractionShape.AddShape(rectangleShape);
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414 |
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415 | mouseEventListener = zoomListener;
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416 | }
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417 | }
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418 | }
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419 |
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420 | private void canvasUI_MouseMove(object sender, MouseEventArgs e) {
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421 | if (mouseEventListener != null) {
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422 | mouseEventListener.MouseMove(sender, e);
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423 | }
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424 | }
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425 |
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426 | private void canvasUI_MouseUp(object sender, MouseEventArgs e) {
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427 | if (mouseEventListener != null) {
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428 | mouseEventListener.MouseUp(sender, e);
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429 | }
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430 |
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431 | mouseEventListener = null;
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432 | }
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433 |
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434 | private void canvasUI1_MouseWheel(object sender, MouseEventArgs e) {
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435 | if (ModifierKeys == Keys.Control) {
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436 | double zoomFactor = (e.Delta > 0) ? 0.9 : 1.1;
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437 |
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438 | foreach (RowEntry rowEntry in rowEntries) {
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439 | RectangleD clippingArea = ZoomListener.ZoomClippingArea(rowEntry.LinesShape.ClippingArea, zoomFactor);
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440 |
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441 | SetClipX(clippingArea.X1, clippingArea.X1);
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442 | SetClipY(rowEntry, clippingArea.Y1, clippingArea.Y2);
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443 | }
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444 | }
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445 | }
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446 |
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447 | #endregion
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448 |
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449 | private class LinesShape : WorldShape {
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450 | public void UpdateStyle(IDataRow row) {
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451 | foreach (IShape shape in shapes) {
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452 | LineShape lineShape = shape as LineShape;
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453 | if (lineShape != null) {
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454 | lineShape.LSColor = row.Color;
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455 | lineShape.LSDrawingStyle = row.Style;
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456 | lineShape.LSThickness = row.Thickness;
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457 | }
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458 | }
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459 | }
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460 |
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461 | public int Count {
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462 | get { return shapes.Count; }
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463 | }
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464 |
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465 | public LineShape GetShape(int index) {
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466 | return (LineShape)shapes[index];
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467 | }
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468 | }
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469 |
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470 | private class RowEntry {
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471 | private readonly IDataRow dataRow;
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472 |
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473 | private readonly Grid grid = new Grid();
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474 | private readonly YAxis yAxis = new YAxis();
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475 | private readonly LinesShape linesShape = new LinesShape();
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476 |
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477 | public RowEntry(IDataRow dataRow) {
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478 | this.dataRow = dataRow;
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479 | }
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480 |
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481 | public IDataRow DataRow {
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482 | get { return dataRow; }
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483 | }
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484 |
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485 | public Grid Grid {
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486 | get { return grid; }
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487 | }
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488 |
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489 | public YAxis YAxis {
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490 | get { return yAxis; }
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491 | }
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492 |
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493 | public LinesShape LinesShape {
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494 | get { return linesShape; }
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495 | }
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496 | }
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497 | }
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498 | } |
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