Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/jfree/AnnotationHelper.java @ 7070:35aabc86566d generator-refactoring
Add NPE guard
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Fri, 20 Sep 2013 14:57:26 +0200 |
parents | 06a9a241faac |
children | 41567bf1e131 |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 package org.dive4elements.river.jfree; |
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9 |
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10 import org.dive4elements.river.artifacts.model.HYKFactory; |
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11 import org.dive4elements.river.themes.ThemeDocument; |
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12 |
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13 import java.util.Collections; |
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14 import java.util.List; |
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15 import java.util.Map; |
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16 |
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17 import java.awt.BasicStroke; |
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18 import java.awt.Color; |
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19 import java.awt.Font; |
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20 |
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21 import org.jfree.ui.TextAnchor; |
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22 import org.jfree.chart.plot.XYPlot; |
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23 import org.jfree.chart.LegendItem; |
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24 import org.jfree.chart.LegendItemCollection; |
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25 import org.jfree.chart.annotations.XYTextAnnotation; |
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26 import org.jfree.chart.annotations.XYLineAnnotation; |
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27 |
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28 import org.dive4elements.river.themes.LineStyle; |
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29 import org.dive4elements.river.themes.TextStyle; |
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30 import org.dive4elements.river.exports.ChartSettings; |
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31 import org.dive4elements.river.exports.LegendSection; |
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32 import org.dive4elements.river.exports.ChartArea; |
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33 |
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34 import org.apache.log4j.Logger; |
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35 |
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36 /** Annotation helper class, handles plotting of annotations. */ |
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37 public class AnnotationHelper { |
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38 private static final Logger logger = Logger.getLogger(AnnotationHelper.class); |
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39 |
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40 protected static float ANNOTATIONS_AXIS_OFFSET = 0.02f; |
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41 |
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42 /* arr this would be better in chartsettings */ |
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43 public static final int DEFAULT_FONT_SIZE = 12; |
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44 public static final String DEFAULT_FONT_NAME = "Tahoma"; |
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45 |
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46 /** |
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47 * Add annotations (Sticky, Text and hyk zones) to a plot. |
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48 * @param annotations Annotations to add |
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49 * @param plot Plot to add annotations to. |
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50 * @param settings ChartSettings object for settings. |
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51 */ |
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52 public static void addAnnotationsToRenderer(List<RiverAnnotation> annotations, |
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53 XYPlot plot, ChartSettings settings, Map<Integer, AxisDataset> datasets) { |
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54 logger.debug("addAnnotationsToRenderer"); |
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55 |
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56 if (annotations == null || annotations.isEmpty()) { |
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57 logger.debug("addAnnotationsToRenderer: no annotations."); |
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58 return; |
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59 } |
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60 |
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61 // OPTMIMIZE: Pre-calculate positions |
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62 ChartArea area = new ChartArea( |
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63 plot.getDomainAxis(0).getRange(), |
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64 plot.getRangeAxis().getRange()); |
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65 |
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66 // Walk over all Annotation sets. |
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67 for (RiverAnnotation fa: annotations) { |
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68 |
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69 // Access text styling, if any. |
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70 ThemeDocument theme = fa.getTheme(); |
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71 TextStyle textStyle = null; |
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72 LineStyle lineStyle = null; |
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73 |
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74 // Get Themeing information and add legend item. |
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75 if (theme != null) { |
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76 textStyle = theme.parseComplexTextStyle(); |
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77 lineStyle = theme.parseComplexLineStyle(); |
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78 if (fa.getLabel() != null) { |
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79 // Legend handling, maybe misplaced? |
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80 LegendItemCollection lic = new LegendItemCollection(); |
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81 LegendItemCollection old = plot.getFixedLegendItems(); |
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82 |
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83 Color color = theme.parseLineColorField(); |
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84 if (color == null) { |
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85 color = Color.BLACK; |
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86 } |
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87 |
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88 LegendItem newItem = new LegendItem(fa.getLabel(), color); |
7070 | 89 LegendSection ls = (settings != null ? |
90 settings.getLegendSection() : null); | |
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91 newItem.setLabelFont (new Font( |
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92 DEFAULT_FONT_NAME, |
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93 Font.PLAIN, |
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94 ls != null ? ls.getFontSize() : null) |
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95 ); |
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96 |
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97 lic.add(newItem); |
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98 // (Re-)Add prior legend entries. |
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99 if (old != null) { |
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100 old.addAll(lic); |
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101 } |
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102 else { |
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103 old = lic; |
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104 } |
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105 plot.setFixedLegendItems(old); |
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106 } |
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107 } |
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108 |
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109 // The 'Sticky' Annotations (at axis, with line and text). |
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110 for (StickyAxisAnnotation sta: fa.getAxisTextAnnotations()) { |
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111 addStickyAnnotation( |
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112 sta, plot, area, lineStyle, textStyle, theme, |
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113 datasets.get(new Integer(sta.getAxisSymbol()))); |
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114 } |
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115 |
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116 // Other Text Annotations (e.g. labels of (manual) points). |
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117 for (XYTextAnnotation ta: fa.getTextAnnotations()) { |
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118 // Style the text. |
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119 if (textStyle != null) { |
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120 textStyle.apply(ta); |
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121 } |
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122 ta.setY(area.above(0.05d, ta.getY())); |
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123 plot.getRenderer().addAnnotation(ta, org.jfree.ui.Layer.FOREGROUND); |
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124 } |
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125 } |
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126 } |
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127 |
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128 /** |
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129 * Add a text and a line annotation. |
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130 * @param area convenience to determine positions in plot. |
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131 * @param theme (optional) theme document |
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132 */ |
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133 public static void addStickyAnnotation( |
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134 StickyAxisAnnotation annotation, |
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135 XYPlot plot, |
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136 ChartArea area, |
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137 LineStyle lineStyle, |
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138 TextStyle textStyle, |
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139 ThemeDocument theme, |
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140 AxisDataset dataset |
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141 ) { |
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142 // OPTIMIZE pre-calculate area-related values |
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143 final float TEXT_OFF = 0.03f; |
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144 |
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145 XYLineAnnotation lineAnnotation = null; |
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146 XYTextAnnotation textAnnotation = null; |
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147 |
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148 int rendererIndex = 0; |
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149 |
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150 if (annotation.atX()) { |
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151 textAnnotation = new CollisionFreeXYTextAnnotation( |
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152 annotation.getText(), annotation.getPos(), area.ofGround(TEXT_OFF)); |
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153 // OPTIMIZE externalize the calculation involving PI. |
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154 //textAnnotation.setRotationAngle(270f*Math.PI/180f); |
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155 lineAnnotation = createGroundStickAnnotation( |
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156 area, annotation.getPos(), lineStyle); |
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157 textAnnotation.setRotationAnchor(TextAnchor.CENTER_LEFT); |
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158 textAnnotation.setTextAnchor(TextAnchor.CENTER_LEFT); |
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159 } |
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160 else { |
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161 // Do the more complicated case where we stick to the Y-Axis. |
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162 // There is one nasty case (duration curves, where annotations |
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163 // might stick to the second y-axis). |
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164 if (dataset == null) { |
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165 logger.warn("Annotation should stick to unfindable y-axis: " |
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166 + annotation.getAxisSymbol()); |
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167 rendererIndex = 0; |
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168 } |
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169 else { |
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170 rendererIndex = dataset.getPlotAxisIndex(); |
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171 } |
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172 |
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173 // Stick to the "right" (opposed to left) Y-Axis. |
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174 if (rendererIndex != 0) { |
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175 // OPTIMIZE: Pass a different area to this function, |
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176 // do the adding to renderer outside (let this |
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177 // function return the annotations). |
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178 // Note that this path is travelled rarely. |
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179 ChartArea area2 = new ChartArea(plot.getDomainAxis(), plot.getRangeAxis(rendererIndex)); |
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180 textAnnotation = new CollisionFreeXYTextAnnotation( |
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181 annotation.getText(), area2.ofRight(TEXT_OFF), annotation.getPos()); |
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182 textAnnotation.setRotationAnchor(TextAnchor.CENTER_RIGHT); |
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183 textAnnotation.setTextAnchor(TextAnchor.CENTER_RIGHT); |
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184 lineAnnotation = createRightStickAnnotation( |
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185 area2, annotation.getPos(), lineStyle); |
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186 if (!Float.isNaN(annotation.getHitPoint()) && theme != null) { |
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187 // New line annotation to hit curve. |
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188 if (theme.parseShowVerticalLine()) { |
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189 XYLineAnnotation hitLineAnnotation = |
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190 createStickyLineAnnotation( |
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191 StickyAxisAnnotation.SimpleAxis.X_AXIS, |
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192 annotation.getHitPoint(), annotation.getPos(),// annotation.getHitPoint(), |
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193 area2, lineStyle); |
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194 plot.getRenderer(rendererIndex).addAnnotation(hitLineAnnotation, |
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195 org.jfree.ui.Layer.BACKGROUND); |
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196 } |
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197 if (theme.parseShowHorizontalLine()) { |
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198 XYLineAnnotation lineBackAnnotation = |
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199 createStickyLineAnnotation( |
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200 StickyAxisAnnotation.SimpleAxis.Y_AXIS2, |
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201 annotation.getPos(), annotation.getHitPoint(), |
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202 area2, lineStyle); |
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203 plot.getRenderer(rendererIndex).addAnnotation(lineBackAnnotation, |
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204 org.jfree.ui.Layer.BACKGROUND); |
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205 } |
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206 } |
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207 } |
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208 else { // Stick to the left y-axis. |
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209 textAnnotation = new CollisionFreeXYTextAnnotation( |
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210 annotation.getText(), area.ofLeft(TEXT_OFF), annotation.getPos()); |
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211 textAnnotation.setRotationAnchor(TextAnchor.CENTER_LEFT); |
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212 textAnnotation.setTextAnchor(TextAnchor.CENTER_LEFT); |
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213 lineAnnotation = createLeftStickAnnotation(area, annotation.getPos(), lineStyle); |
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214 if (!Float.isNaN(annotation.getHitPoint()) && theme != null) { |
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215 // New line annotation to hit curve. |
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216 if (theme.parseShowHorizontalLine()) { |
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217 XYLineAnnotation hitLineAnnotation = |
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218 createStickyLineAnnotation( |
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219 StickyAxisAnnotation.SimpleAxis.Y_AXIS, |
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220 annotation.getPos(), annotation.getHitPoint(), |
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221 area, lineStyle); |
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222 plot.getRenderer(rendererIndex).addAnnotation(hitLineAnnotation, |
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223 org.jfree.ui.Layer.BACKGROUND); |
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224 } |
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225 if (theme.parseShowVerticalLine()) { |
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226 XYLineAnnotation lineBackAnnotation = |
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227 createStickyLineAnnotation( |
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228 StickyAxisAnnotation.SimpleAxis.X_AXIS, |
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229 annotation.getHitPoint(), annotation.getPos(), |
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230 area, lineStyle); |
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231 plot.getRenderer(rendererIndex).addAnnotation(lineBackAnnotation, |
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232 org.jfree.ui.Layer.BACKGROUND); |
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233 } |
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234 } |
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235 } |
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236 } |
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237 |
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238 // Style the text. |
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239 if (textStyle != null) { |
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240 textStyle.apply(textAnnotation); |
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241 } |
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242 |
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243 // Add the Annotations to renderer. |
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244 plot.getRenderer(rendererIndex).addAnnotation(textAnnotation, |
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245 org.jfree.ui.Layer.FOREGROUND); |
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246 plot.getRenderer(rendererIndex).addAnnotation(lineAnnotation, |
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247 org.jfree.ui.Layer.FOREGROUND); |
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248 } |
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249 |
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250 /** |
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251 * Create annotation that sticks to "ground" (X) axis. |
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252 * @param area helper to calculate coordinates |
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253 * @param pos one-dimensional position (distance from axis) |
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254 * @param lineStyle the line style to use for the line. |
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255 */ |
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256 public static XYLineAnnotation createGroundStickAnnotation( |
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257 ChartArea area, float pos, LineStyle lineStyle |
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258 ) { |
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259 // Style the line. |
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260 if (lineStyle != null) { |
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261 return new XYLineAnnotation( |
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262 pos, area.atGround(), |
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263 pos, area.ofGround(ANNOTATIONS_AXIS_OFFSET), |
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264 new BasicStroke(lineStyle.getWidth()),lineStyle.getColor()); |
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265 } |
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266 else { |
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267 return new XYLineAnnotation( |
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268 pos, area.atGround(), |
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269 pos, area.ofGround(ANNOTATIONS_AXIS_OFFSET)); |
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270 } |
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271 } |
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272 |
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273 |
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274 /** |
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275 * Create annotation that sticks to the second Y axis ("right"). |
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276 * @param area helper to calculate coordinates |
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277 * @param pos one-dimensional position (distance from axis) |
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278 * @param lineStyle the line style to use for the line. |
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279 */ |
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280 public static XYLineAnnotation createRightStickAnnotation( |
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281 ChartArea area, float pos, LineStyle lineStyle |
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282 ) { |
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283 // Style the line. |
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284 if (lineStyle != null) { |
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285 return new XYLineAnnotation( |
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286 area.ofRight(ANNOTATIONS_AXIS_OFFSET), pos, |
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287 area.atRight(), pos, |
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288 new BasicStroke(lineStyle.getWidth()), lineStyle.getColor()); |
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289 } |
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290 else { |
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291 return new XYLineAnnotation( |
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292 area.atRight(), pos, |
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293 area.ofRight(ANNOTATIONS_AXIS_OFFSET), pos); |
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294 } |
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295 } |
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296 /** |
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297 * Create annotation that sticks to the first Y axis ("left"). |
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298 * @param area helper to calculate coordinates |
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299 * @param pos one-dimensional position (distance from axis) |
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300 * @param lineStyle the line style to use for the line. |
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301 */ |
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302 public static XYLineAnnotation createLeftStickAnnotation( |
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303 ChartArea area, float pos, LineStyle lineStyle |
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304 ) { |
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305 // Style the line. |
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306 if (lineStyle != null) { |
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307 return new XYLineAnnotation( |
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308 area.atLeft(), pos, |
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309 area.ofLeft(ANNOTATIONS_AXIS_OFFSET), pos, |
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310 new BasicStroke(lineStyle.getWidth()), lineStyle.getColor()); |
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311 } |
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312 else { |
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313 return new XYLineAnnotation( |
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314 area.atLeft(), pos, |
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315 area.ofLeft(ANNOTATIONS_AXIS_OFFSET), pos); |
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316 } |
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317 } |
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318 |
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319 |
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320 /** |
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321 * Create a line from a axis to a given point. |
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322 * @param axis The "simple" axis. |
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323 * @param fromD1 from-location in first dimension. |
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324 * @param toD2 to-location in second dimension. |
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325 * @param area helper to calculate offsets. |
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326 * @param lineStyle optional line style. |
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327 */ |
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328 public static XYLineAnnotation createStickyLineAnnotation( |
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329 StickyAxisAnnotation.SimpleAxis axis, float fromD1, float toD2, |
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330 ChartArea area, LineStyle lineStyle |
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331 ) { |
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332 double anchorX1 = 0d, anchorX2 = 0d, anchorY1 = 0d, anchorY2 = 0d; |
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333 switch(axis) { |
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334 case X_AXIS: |
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335 anchorX1 = fromD1; |
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336 anchorX2 = fromD1; |
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337 anchorY1 = area.atGround(); |
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338 anchorY2 = toD2; |
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339 break; |
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340 case Y_AXIS: |
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341 anchorX1 = area.atLeft(); |
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342 anchorX2 = toD2; |
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343 anchorY1 = fromD1; |
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344 anchorY2 = fromD1; |
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345 break; |
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346 case Y_AXIS2: |
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347 anchorX1 = area.atRight(); |
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348 anchorX2 = toD2; |
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349 anchorY1 = fromD1; |
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350 anchorY2 = fromD1; |
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351 break; |
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352 } |
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353 // Style the line. |
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354 if (lineStyle != null) { |
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355 return new XYLineAnnotation( |
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356 anchorX1, anchorY1, |
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357 anchorX2, anchorY2, |
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358 new BasicStroke(lineStyle.getWidth()), lineStyle.getColor()); |
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359 } |
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360 else { |
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361 return new XYLineAnnotation( |
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362 anchorX1, anchorY1, |
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363 anchorX2, anchorY2); |
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364 } |
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365 } |
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366 |
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367 }; |