Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 1687:19c4cf5163e8
Take care on empty ranges (null) while preparing single point ranges.
flys-artifacts/trunk@2905 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 07 Oct 2011 13:33:10 +0000 |
parents | e8d1e531687a |
children | 7eb9015489b0 |
rev | line source |
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.awt.BasicStroke; |
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4 import java.awt.Color; |
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5 import java.awt.Stroke; |
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6 |
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7 import java.io.IOException; |
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8 |
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9 import java.text.NumberFormat; |
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10 |
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11 import java.util.ArrayList; |
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12 import java.util.HashMap; |
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13 import java.util.List; |
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14 import java.util.Map; |
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15 |
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16 import org.w3c.dom.Document; |
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17 |
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18 import org.apache.log4j.Logger; |
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19 |
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20 import org.jfree.chart.ChartFactory; |
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21 import org.jfree.chart.JFreeChart; |
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22 import org.jfree.chart.LegendItem; |
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23 import org.jfree.chart.LegendItemCollection; |
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24 import org.jfree.chart.annotations.XYTextAnnotation; |
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25 import org.jfree.chart.axis.NumberAxis; |
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26 import org.jfree.chart.axis.ValueAxis; |
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27 import org.jfree.chart.plot.PlotOrientation; |
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28 import org.jfree.chart.plot.XYPlot; |
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29 import org.jfree.chart.renderer.xy.XYItemRenderer; |
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30 import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; |
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31 import org.jfree.data.Range; |
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32 import org.jfree.data.xy.XYSeries; |
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33 import org.jfree.data.xy.XYSeriesCollection; |
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34 |
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35 import org.jfree.ui.RectangleInsets; |
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36 |
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37 import de.intevation.flys.exports.ChartExportHelper; |
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38 import de.intevation.flys.jfree.FLYSAnnotation; |
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39 import de.intevation.flys.utils.ThemeUtil; |
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40 |
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41 |
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42 /** |
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43 * An abstract base class for creating XY charts. |
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44 * |
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45 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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46 */ |
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47 public abstract class XYChartGenerator extends ChartGenerator { |
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48 |
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49 /** The logger that is used in this generator. */ |
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50 private static Logger logger = Logger.getLogger(XYChartGenerator.class); |
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51 |
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52 |
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53 /** SeriesCollection used for the first axis. */ |
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54 protected XYSeriesCollection first; |
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55 |
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56 /** SeriesCollection used for the second axis. */ |
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57 protected XYSeriesCollection second; |
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58 |
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59 /** List of annotations to insert in plot. */ |
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60 protected List<FLYSAnnotation> annotations; |
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61 |
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62 /** The max X range to include all X values of all series for each axis. */ |
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63 protected Map<Integer, Range> xRanges; |
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64 |
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65 /** The max Y range to include all Y values of all series for each axis. */ |
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66 protected Map<Integer, Range> yRanges; |
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67 |
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68 public static final Color DEFAULT_GRID_COLOR = Color.GRAY; |
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69 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f; |
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70 |
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71 |
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72 /** |
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73 * Returns the title of a chart. |
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74 * |
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75 * @return the title of a chart. |
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76 */ |
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77 protected abstract String getChartTitle(); |
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78 |
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79 /** |
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80 * Returns the X-Axis label of a chart. |
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81 * |
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82 * @return the X-Axis label of a chart. |
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83 */ |
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84 protected abstract String getXAxisLabel(); |
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85 |
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86 /** |
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87 * Returns the Y-Axis label of a chart. |
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88 * |
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89 * @return the Y-Axis label of a chart. |
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90 */ |
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91 protected abstract String getYAxisLabel(); |
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92 |
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93 |
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94 public void generate() |
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95 throws IOException |
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96 { |
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97 logger.debug("XYChartGenerator.generate"); |
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98 |
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99 JFreeChart chart = generateChart(); |
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100 |
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101 int[] size = getSize(); |
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102 |
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103 ChartExportHelper.exportImage( |
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104 out, |
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105 chart, |
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106 "png", |
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107 size[0], size[1]); |
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108 } |
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109 |
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110 |
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111 public JFreeChart generateChart() { |
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112 logger.debug("XYChartGenerator.generateChart"); |
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113 |
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114 JFreeChart chart = ChartFactory.createXYLineChart( |
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115 getChartTitle(), |
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116 getXAxisLabel(), |
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117 getYAxisLabel(), |
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118 null, |
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119 PlotOrientation.VERTICAL, |
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120 true, |
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121 false, |
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122 false); |
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123 |
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124 chart.setBackgroundPaint(Color.WHITE); |
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125 chart.getPlot().setBackgroundPaint(Color.WHITE); |
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126 |
419
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127 XYPlot plot = (XYPlot) chart.getPlot(); |
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128 |
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129 addDatasets(plot); |
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130 addAnnotations(plot); |
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131 addSubtitles(chart); |
419
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132 adjustPlot(plot); |
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133 adjustAxes(plot); |
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134 localizeAxes(plot); |
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135 |
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136 removeEmptyRangeAxes(plot); |
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137 |
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138 preparePointRanges(plot); |
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139 autoZoom(plot); |
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140 |
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141 applyThemes(plot); |
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142 |
653
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143 return chart; |
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144 } |
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145 |
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146 |
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147 /** |
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148 * Add first and second dataset to plot. |
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149 * @param plot plot to add datasets to. |
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150 */ |
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151 protected void addDatasets(XYPlot plot) { |
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152 if (first != null) { |
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153 logger.debug("Set the first axis dataset."); |
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154 plot.setDataset(0, first); |
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155 } |
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156 if (second != null) { |
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157 logger.debug("Set the second axis dataset."); |
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158 plot.setDataset(1, second); |
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159 } |
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160 } |
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161 |
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162 |
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163 public void addFirstAxisSeries(XYSeries series, boolean visible) { |
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164 if (first == null) { |
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165 first = new XYSeriesCollection(); |
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166 } |
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167 |
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168 if (series != null) { |
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169 if (visible) { |
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170 first.addSeries(series); |
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171 } |
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172 |
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173 combineYRanges(new Range(series.getMinY(), series.getMaxY()), 0); |
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174 combineXRanges(new Range(series.getMinX(), series.getMaxX()), 0); |
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175 } |
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176 } |
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177 |
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178 |
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179 public void addSecondAxisSeries(XYSeries series, boolean visible) { |
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180 if (second == null) { |
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181 second = new XYSeriesCollection(); |
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182 } |
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183 |
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184 if (series != null) { |
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185 if (visible) { |
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186 second.addSeries(series); |
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187 } |
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188 |
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189 combineYRanges(new Range(series.getMinY(), series.getMaxY()), 1); |
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190 combineXRanges(new Range(series.getMinX(), series.getMaxX()), 0); |
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191 } |
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192 } |
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193 |
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194 |
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195 private void combineXRanges(Range range, int index) { |
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196 Integer key = new Integer(index); |
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197 |
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198 if (xRanges == null) { |
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199 xRanges = new HashMap<Integer, Range>(); |
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200 xRanges.put(key, range); |
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201 return; |
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202 } |
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203 |
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204 Range newX = null; |
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205 Range oldX = xRanges.get(key); |
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206 |
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207 if (oldX != null) { |
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208 newX = Range.combine(oldX, range); |
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209 } |
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210 else { |
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211 newX = range; |
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212 } |
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213 |
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214 xRanges.put(key, newX); |
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215 } |
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216 |
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217 |
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218 private void combineYRanges(Range range, int index) { |
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219 Integer key = new Integer(index); |
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220 |
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221 if (yRanges == null) { |
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222 yRanges = new HashMap<Integer, Range>(); |
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223 yRanges.put(key, range); |
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224 return; |
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225 } |
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226 |
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227 Range newY = null; |
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228 Range oldY = yRanges.get(key); |
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229 |
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230 if (oldY != null) { |
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231 newY = Range.combine(oldY, range); |
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232 } |
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233 else { |
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234 newY = range; |
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235 } |
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236 |
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237 yRanges.put(key, newY); |
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238 } |
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239 |
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240 |
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241 public void addAnnotations(FLYSAnnotation annotation, boolean visible) { |
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242 if (!visible) { |
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243 return; |
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244 } |
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245 |
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246 if (annotations == null) { |
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247 annotations = new ArrayList<FLYSAnnotation>(); |
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248 } |
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249 |
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250 annotations.add(annotation); |
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251 } |
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252 |
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253 |
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254 private void removeEmptyRangeAxes(XYPlot plot) { |
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255 if (first == null) { |
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256 plot.setRangeAxis(0, null); |
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257 } |
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258 |
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259 if (second == null) { |
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260 plot.setRangeAxis(1, null); |
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261 } |
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262 } |
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263 |
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264 |
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265 private void preparePointRanges(XYPlot plot) { |
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266 for (int i = 0, num = plot.getDomainAxisCount(); i < num; i++) { |
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267 Integer key = new Integer(i); |
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268 |
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269 Range r = xRanges.get(key); |
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270 if (r != null && r.getLowerBound() == r.getUpperBound()) { |
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271 xRanges.put(key, expandRange(r, 5)); |
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272 } |
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273 } |
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274 |
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275 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) { |
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276 Integer key = new Integer(i); |
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277 |
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278 Range r = yRanges.get(key); |
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279 if (r != null && r.getLowerBound() == r.getUpperBound()) { |
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280 yRanges.put(key, expandRange(r, 5)); |
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281 } |
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282 } |
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283 } |
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284 |
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285 |
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286 public static Range expandRange(Range range, double percent) { |
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287 if (range == null) { |
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288 return null; |
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289 } |
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290 |
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291 double value = range.getLowerBound(); |
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292 double expand = value / 100 * percent; |
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293 |
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294 return expand != 0 |
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295 ? new Range(value-expand, value+expand) |
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296 : new Range(-0.01 * percent, 0.01 * percent); |
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297 } |
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298 |
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299 |
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300 /** |
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301 * This method zooms the plot to the specified ranges in the attribute |
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302 * document or to the ranges specified by the min/max values in the |
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303 * datasets. <b>Note:</b> We determine the range manually if no zoom ranges |
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304 * are given, because JFreeCharts auto-zoom adds a margin to the left and |
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305 * right of the data area. |
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306 * |
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307 * @param plot The XYPlot. |
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308 */ |
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309 protected void autoZoom(XYPlot plot) { |
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310 logger.debug("Zoom to specified ranges."); |
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311 |
673
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312 Range xrange = getDomainAxisRange(); |
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313 Range yrange = getValueAxisRange(); |
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314 |
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315 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) { |
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316 Range[] ranges = new Range[] { |
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317 xRanges.get(0), |
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318 yRanges.get(new Integer(i)) }; |
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319 |
673
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320 if (i == 0) { |
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321 ValueAxis xaxis = plot.getDomainAxis(); |
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322 zoomX(plot, xaxis, ranges[0], xrange); |
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323 } |
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324 |
673
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325 ValueAxis yaxis = plot.getRangeAxis(i); |
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326 |
673
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327 if (yaxis == null) { |
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328 continue; |
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329 } |
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330 |
718
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331 zoomY(plot, yaxis, ranges[1], yrange); |
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332 } |
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333 } |
652
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334 |
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335 |
718
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336 protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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337 return zoom(plot, axis, range, x); |
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338 } |
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339 |
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340 |
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341 protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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342 return zoom(plot, axis, range, x); |
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343 } |
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344 |
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345 |
653
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346 /** |
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347 * Zooms the x axis to the range specified in the attribute document. |
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348 * |
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349 * @param plot The XYPlot. |
673
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350 * @param axis The axis the shoud be modified. |
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351 * @param range The whole range specified by a dataset. |
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352 * @param x A user defined range (null permitted). |
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353 * |
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354 * @return true, if a zoom range was specified, otherwise false. |
653
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355 */ |
673
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356 protected boolean zoom(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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357 if (x != null) { |
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358 double min = range.getLowerBound(); |
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359 double max = range.getUpperBound(); |
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360 double diff = max > min ? max - min : min - max; |
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361 |
673
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362 Range computed = new Range( |
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363 min + x.getLowerBound() * diff, |
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364 min + x.getUpperBound() * diff); |
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365 |
717
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366 axis.setRangeWithMargins(computed); |
673
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367 |
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368 logger.debug("Zoom axis to: " + computed); |
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369 |
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370 return true; |
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371 } |
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372 |
717
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373 axis.setRangeWithMargins(range); |
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374 return false; |
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375 } |
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376 |
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377 |
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378 /** |
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379 * This method extracts the minimum and maximum values for x and y axes |
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380 * which are stored in <i>xRanges</i> and <i>yRanges</i>. |
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381 * |
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382 * @param index The index of the y-Axis. |
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383 * |
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384 * @return a Range[] as follows: [x-Range, y-Range]. |
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385 */ |
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386 public Range[] getRangesForDataset(int index) { |
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387 return new Range[] { |
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388 xRanges.get(new Integer(0)), |
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389 yRanges.get(new Integer(index)) |
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390 }; |
652
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391 } |
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392 |
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393 |
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394 protected void addAnnotations(XYPlot plot) { |
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395 plot.clearAnnotations(); |
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396 |
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397 if (annotations == null) { |
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398 logger.debug("No Annotations given."); |
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399 return; |
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400 } |
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401 |
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402 LegendItemCollection lic = new LegendItemCollection(); |
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403 |
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404 int idx = 0; |
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405 if (plot.getRangeAxis(idx) == null && plot.getRangeAxisCount() >= 2) { |
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406 idx = 1; |
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407 } |
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408 |
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409 XYItemRenderer renderer = plot.getRenderer(idx); |
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410 |
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411 for (FLYSAnnotation fa: annotations) { |
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412 Document theme = fa.getTheme(); |
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413 |
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414 Color color = theme != null |
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415 ? ThemeUtil.parseLineColorField(theme) |
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416 : null; |
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417 |
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418 if (color == null) { |
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419 color = Color.black; |
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420 } |
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421 |
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422 lic.add(new LegendItem(fa.getLabel(), color)); |
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423 |
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424 for (XYTextAnnotation ta: fa.getAnnotations()) { |
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425 ta.setPaint(color); |
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426 renderer.addAnnotation(ta); |
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427 } |
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428 |
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429 plot.setFixedLegendItems(lic); |
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430 } |
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431 } |
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432 |
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433 |
369
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434 /** |
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435 * Adjusts the axes of a plot. |
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436 * |
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437 * @param plot The XYPlot of the chart. |
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438 */ |
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439 protected void adjustAxes(XYPlot plot) { |
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440 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis(); |
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441 |
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442 yAxis.setAutoRangeIncludesZero(false); |
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443 } |
414
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444 |
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445 |
419
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446 protected void adjustPlot(XYPlot plot) { |
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447 Stroke gridStroke = new BasicStroke( |
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448 DEFAULT_GRID_LINE_WIDTH, |
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449 BasicStroke.CAP_BUTT, |
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450 BasicStroke.JOIN_MITER, |
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451 3.0f, |
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452 new float[] { 3.0f }, |
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453 0.0f); |
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454 |
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455 plot.setDomainGridlineStroke(gridStroke); |
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456 plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR); |
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457 plot.setDomainGridlinesVisible(true); |
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458 |
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459 plot.setRangeGridlineStroke(gridStroke); |
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460 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR); |
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461 plot.setRangeGridlinesVisible(true); |
654
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462 |
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463 plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d)); |
923
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464 |
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#135 Modified the way to store datasets for different chart axes.
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465 if (plot.getDataset(0) != null) { |
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466 plot.mapDatasetToRangeAxis(0, 0); |
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467 } |
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468 |
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469 if (plot.getDataset(1) != null) { |
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470 plot.mapDatasetToRangeAxis(1, 1); |
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471 } |
419
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472 } |
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473 |
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474 |
414
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475 protected void addSubtitles(JFreeChart chart) { |
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476 // override this method in subclasses that need subtitles |
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477 } |
924
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An initial implementation to render chart series based on the XML configuration in themes.xml.
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478 |
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479 |
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480 /** |
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481 * This method walks over all axes (domain and range) of <i>plot</i> and |
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482 * calls localizeDomainAxis() for domain axes or localizeRangeAxis() for |
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483 * range axes. |
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484 * |
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485 * @param plot The XYPlot. |
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486 */ |
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487 private void localizeAxes(XYPlot plot) { |
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488 for (int i = 0, num = plot.getDomainAxisCount(); i < num; i++) { |
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489 ValueAxis axis = plot.getDomainAxis(i); |
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490 |
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491 if (axis != null) { |
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492 localizeDomainAxis(axis); |
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493 } |
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494 else { |
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495 logger.warn("Domain axis at " + i + " is null."); |
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496 } |
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497 } |
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498 |
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499 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) { |
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500 ValueAxis axis = plot.getRangeAxis(i); |
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501 |
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502 if (axis != null) { |
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503 localizeRangeAxis(axis); |
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504 } |
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505 else { |
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506 logger.warn("Range axis at " + i + " is null."); |
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507 } |
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508 } |
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509 } |
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510 |
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511 |
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512 /** |
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513 * Overrides the NumberFormat with the NumberFormat for the current locale |
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514 * that is provided by getLocale(). |
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515 * |
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516 * @param domainAxis The domain axis that needs localization. |
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517 */ |
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518 protected void localizeDomainAxis(ValueAxis domainAxis) { |
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519 NumberFormat nf = NumberFormat.getInstance(getLocale()); |
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520 ((NumberAxis) domainAxis).setNumberFormatOverride(nf); |
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521 } |
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522 |
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523 |
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524 /** |
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525 * Overrides the NumberFormat with the NumberFormat for the current locale |
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526 * that is provided by getLocale(). |
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527 * |
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528 * @param domainAxis The domain axis that needs localization. |
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529 */ |
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530 protected void localizeRangeAxis(ValueAxis rangeAxis) { |
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531 NumberFormat nf = NumberFormat.getInstance(getLocale()); |
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532 ((NumberAxis) rangeAxis).setNumberFormatOverride(nf); |
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533 } |
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534 |
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535 |
924
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536 protected void applyThemes(XYPlot plot) { |
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537 if (first != null) { |
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538 applyThemes(plot, first, 0); |
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539 } |
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540 |
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541 if (second != null) { |
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542 applyThemes(plot, second, 1); |
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543 } |
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544 } |
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545 |
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546 |
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547 protected void applyThemes(XYPlot plot, XYSeriesCollection dataset, int i) { |
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548 LegendItemCollection lic = new LegendItemCollection(); |
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549 LegendItemCollection anno = plot.getFixedLegendItems(); |
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550 |
924
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551 XYLineAndShapeRenderer r = getRenderer(plot, i); |
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552 |
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553 for (int s = 0, num = dataset.getSeriesCount(); s < num; s++) { |
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554 XYSeries series = dataset.getSeries(s); |
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555 |
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556 if (series instanceof StyledXYSeries) { |
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557 ((StyledXYSeries) series).applyTheme(r, s); |
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558 } |
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559 |
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560 // special case: if there is just one single item, we need to enable |
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561 // points for this series, otherwise we would not see anything in |
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562 // the chart area. |
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563 if (series.getItemCount() == 1) { |
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564 r.setSeriesShapesVisible(s, true); |
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565 } |
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566 |
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567 lic.add(r.getLegendItem(i, s)); |
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568 } |
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569 |
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570 if (anno != null) { |
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571 lic.addAll(anno); |
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572 } |
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573 |
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574 plot.setFixedLegendItems(lic); |
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575 |
924
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576 plot.setRenderer(i, r); |
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577 } |
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578 |
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579 |
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580 protected XYLineAndShapeRenderer getRenderer(XYPlot plot, int idx) { |
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581 XYLineAndShapeRenderer r = |
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582 (XYLineAndShapeRenderer) plot.getRenderer(idx); |
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583 |
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584 if (r != null) { |
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585 return r; |
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586 } |
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587 |
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588 if (idx == 0) { |
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589 logger.warn("No default renderer set!"); |
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590 return new XYLineAndShapeRenderer(); |
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591 } |
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592 |
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593 r = (XYLineAndShapeRenderer) plot.getRenderer(0); |
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594 |
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595 try { |
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596 return (XYLineAndShapeRenderer) r.clone(); |
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597 } |
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598 catch (CloneNotSupportedException cnse) { |
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599 logger.warn(cnse, cnse); |
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600 } |
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601 |
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602 logger.warn("No applicalable renderer found!"); |
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603 |
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604 return new XYLineAndShapeRenderer(); |
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605 } |
369
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606 } |
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607 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |