Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractXYLineChart.java @ 779:b1f5f2a8840f
Ordered imports. Removed needless imports. Removed empty headers.
gnv-artifacts/trunk@854 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 08:51:20 +0000 |
parents | 9a828e5a2390 |
children | 3509735619e7 |
rev | line source |
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1 package de.intevation.gnv.chart; |
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2 |
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3 import de.intevation.gnv.geobackend.base.Result; |
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4 |
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5 import de.intevation.gnv.state.describedata.KeyValueDescibeData; |
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6 |
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7 import java.awt.Color; |
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8 |
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9 import java.awt.geom.Ellipse2D; |
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10 |
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11 import java.text.NumberFormat; |
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12 |
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13 import java.util.Collection; |
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14 import java.util.Iterator; |
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15 import java.util.Locale; |
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16 import java.util.Map; |
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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 |
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23 import org.jfree.chart.axis.Axis; |
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24 import org.jfree.chart.axis.AxisLocation; |
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25 import org.jfree.chart.axis.NumberAxis; |
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26 import org.jfree.chart.axis.NumberTickUnit; |
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27 |
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28 import org.jfree.chart.plot.PlotOrientation; |
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29 import org.jfree.chart.plot.XYPlot; |
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30 |
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31 import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; |
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32 |
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33 import org.jfree.chart.title.TextTitle; |
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34 |
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35 import org.jfree.data.Range; |
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36 |
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37 import org.jfree.data.general.Series; |
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38 |
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39 import org.jfree.data.xy.XYDataset; |
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40 |
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41 /** |
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42 * This abstract class defines some methods to adjust chart settings after its |
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43 * creation. |
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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 AbstractXYLineChart |
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48 extends AbstractChart |
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49 { |
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50 /** |
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51 * Constant field used to expand the area between data and chart border. Its |
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52 * value is {@value}.<br> |
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53 * A value of 0.05 equals 5 percent. |
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54 */ |
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55 public static final double LOWER_MARGIN = 0.05D; |
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56 |
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57 /** |
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58 * Constant field used to expand the area between data and chart border. Its |
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59 * value is {@value}.<br> |
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60 * A value of 0.05 equals 5 percent. |
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61 */ |
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62 public static final double UPPER_MARGIN = 0.05D; |
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63 |
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64 /** |
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65 * Logger used to log with log4j. |
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66 */ |
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67 private static Logger log = Logger.getLogger(AbstractXYLineChart.class); |
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68 |
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69 /** |
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70 * Field of supported colors used for lines and data points in charts. |
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71 * Colors are: {@value}. |
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72 */ |
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73 protected static Color[] COLOR = { |
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74 Color.black, Color.red, Color.green, Color.blue, Color.yellow, |
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75 Color.gray, Color.orange, Color.pink, Color.cyan |
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76 }; |
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77 |
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78 /** |
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79 * Static field to remember the index of the previously used color. |
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80 */ |
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81 protected static int nextColor = 0; |
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82 |
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83 /** |
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84 * Default <code>PlotOrientation</code>. Its value is {@value}. |
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85 */ |
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86 protected PlotOrientation PLOT_ORIENTATION = PlotOrientation.VERTICAL; |
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87 |
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88 /** |
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89 * Map to store datasets for each parameter. |
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90 */ |
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91 protected Map datasets; |
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92 |
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93 /** |
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94 * Map to store max ranges of each parameter (axis.setAutoRange(true) |
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95 * doesn't seem to work */ |
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96 protected Map ranges; |
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97 |
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98 /** |
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99 * This method is called by <code>Chart</code> to bring the data into the |
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100 * right form fitting to JFreeChart objects. |
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101 */ |
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102 protected abstract void initData(); |
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103 |
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104 /** |
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105 * Add a value of <code>row</code> to <code>series</code>. |
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106 * |
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107 * @param row <code>Result</code> Object returned from database. Contains |
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108 * a value used to add to <code>series</code> |
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109 * @param series A JFreeChart Series object. |
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110 */ |
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111 protected abstract void addValue(Result row, Series series); |
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112 |
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113 /** |
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114 * Add <code>series</code> to JFreeChart's Dataset object currently which is |
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115 * processing. |
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116 * |
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117 * @param series Series to add. |
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118 * @param label Label used show in legend. |
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119 * @param idx Currently not used. |
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120 */ |
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121 protected abstract void addSeries(Series series, String label, int idx); |
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122 |
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123 /** |
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124 * Abstract method which is called by <code>Chart</code> interface after |
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125 * chart creation. It turns an axis' label into a locale specific format. |
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126 * |
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127 * @param axis Axis to adjust. |
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128 * @param local java.util.Locale object used specify the format. |
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129 */ |
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130 protected abstract void localizeDomainAxis(Axis axis, Locale locale); |
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131 |
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132 /** |
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133 * Abstract method to create a label for a series of parameters. |
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134 * |
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135 * @param breakPoint1 Identifier returned from database. These identifier |
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136 * are used to identify the results from database which are all stored in |
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137 * one big java.util.Collection. |
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138 * @param breakPoint2 Identifier returned from database. |
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139 * @param breakPoint3 Identifier returned from database. |
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140 * |
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141 * @return Concatinated string of parameter name and measurement. |
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142 */ |
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143 protected abstract String createSeriesName( |
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144 String breakPoint1, |
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145 String breakPoint2, |
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146 String breakPoint3 |
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147 ); |
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148 |
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149 |
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150 /** |
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151 * @see de.intevation.gnv.chart.Chart#generateChart() |
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152 */ |
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153 public JFreeChart generateChart() { |
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154 log.debug("generate XYLineChart"); |
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155 nextColor = 0; |
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156 |
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157 if (chart != null) |
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158 return chart; |
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159 |
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160 initChart(); |
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161 |
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162 chart.addSubtitle(new TextTitle(labels.getSubtitle())); |
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163 |
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164 theme.apply(chart); |
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165 initData(); |
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166 |
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167 adjustPlot((XYPlot)chart.getPlot()); |
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168 |
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169 return chart; |
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170 } |
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171 |
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172 |
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173 /** |
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174 * @see de.intevation.gnv.chart.AbstractChart#initChart() |
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175 */ |
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176 protected void initChart() { |
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177 chart = ChartFactory.createXYLineChart( |
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178 labels.getTitle(), |
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179 labels.getDomainAxisLabel(), |
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180 null, |
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181 null, |
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182 PLOT_ORIENTATION, |
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183 true, |
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184 false, |
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185 false |
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186 ); |
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187 } |
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188 |
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189 |
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190 /** |
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191 * Method used to adjust the axes after chart generation. Methods for i18n |
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192 * support ({@link #localizeDomainAxis and {@link #localizeRangeAxis) are |
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193 * called and axes of this series are expanded ({@link org.jfree.data.Range#expand( |
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194 * Range, double, double}). |
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195 * |
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196 * @param seriesKey Identifier of an axis which have to be adjusted. |
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197 * @param idx Set the axis identified by <code>seriesKey</code> to position |
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198 * <code>idx</code>. |
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199 * |
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200 * @see org.jfree.data.Range#expand(Range, double, double) |
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201 */ |
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202 protected void prepareAxis(String seriesKey, int idx) { |
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203 log.debug("prepare axis of xychart"); |
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204 |
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205 XYPlot plot = chart.getXYPlot(); |
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206 Axis xAxis = plot.getDomainAxis(); |
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207 NumberAxis yAxis = new NumberAxis(seriesKey); |
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208 |
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209 localizeDomainAxis(xAxis, locale); |
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210 localizeRangeAxis(yAxis, locale); |
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211 |
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212 // litte workarround to adjust the max range of axes. |
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213 // NumberAxis.setAutoRange(true) doesn't seem to work properly. |
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214 Range yRange = (Range) ranges.get(seriesKey); |
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215 yAxis.setRange(Range.expand(yRange, LOWER_MARGIN, UPPER_MARGIN)); |
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216 log.debug("Max Range of dataset is: " + yRange.toString()); |
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217 |
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218 if (seriesKey.contains("richtung")) { |
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219 yAxis.setTickUnit(new NumberTickUnit(30.0)); |
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220 yAxis.setUpperBound(360.0); |
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221 yAxis.setLowerBound(0.0); |
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222 } |
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223 else { |
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224 yAxis.setFixedDimension(10.0); |
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225 yAxis.setAutoRangeIncludesZero(false); |
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226 } |
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227 |
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228 plot.setRangeAxis(idx, yAxis); |
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229 yAxis.configure(); |
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230 |
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231 if (idx % 2 != 0) |
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232 plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_RIGHT); |
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233 else |
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234 plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_LEFT); |
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235 |
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236 plot.mapDatasetToRangeAxis(idx, idx); |
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237 } |
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238 |
327
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239 |
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240 /** |
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241 * Method to adjust the rendering of a series in a chart. Line color and |
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242 * symbols of vertices are configured here. |
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243 * |
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244 * @param idx Position of the renderer. |
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245 * @param seriesCount Maximum number of series in this chart. |
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246 * @param renderLines Lines are displayed if true, otherwise they are not. |
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247 * @param renderShapes Vertices are displayed if true, otherwise they are |
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248 * not. |
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249 */ |
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250 protected void adjustRenderer( |
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251 int idx, |
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252 int seriesCount, |
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253 boolean renderLines, |
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254 boolean renderShapes |
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255 ) { |
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256 log.debug("Adjust render of series"); |
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257 XYLineAndShapeRenderer renderer = null; |
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258 XYPlot plot = chart.getXYPlot(); |
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259 |
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260 try { |
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261 renderer = (XYLineAndShapeRenderer)((XYLineAndShapeRenderer) |
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262 (plot.getRenderer())).clone(); |
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263 } |
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264 catch (CloneNotSupportedException cnse) { |
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265 log.warn("Error while cloning renderer.", cnse); |
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266 renderer = new XYLineAndShapeRenderer(renderLines, renderShapes); |
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267 renderer.setBaseShape(new Ellipse2D.Double(-2,-2,4,4)); |
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268 } |
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269 |
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270 for (int i = 0; i < seriesCount; i++) { |
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271 renderer.setSeriesShape(i, renderer.getSeriesShape(0)); |
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272 renderer.setSeriesPaint(i, COLOR[nextColor() % COLOR.length]); |
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273 renderer.setSeriesShapesVisible(i, renderShapes); |
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274 renderer.setSeriesLinesVisible(i, renderLines); |
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275 } |
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276 plot.setRenderer(idx, renderer); |
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277 } |
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278 |
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279 protected static synchronized int nextColor() { |
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280 return nextColor++; |
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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 * Method to adjust the plot rendering. Disable horizontal grid lines if |
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286 * <code>plot</code> contains only a single y-axis. |
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287 * |
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288 * @param plot JFreeChart Plot object to be adjusted. |
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289 */ |
344
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290 protected void adjustPlot(XYPlot plot) { |
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291 if (plot.getRangeAxisCount() > 1) |
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292 plot.setRangeGridlinesVisible(false); |
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293 } |
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294 |
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295 |
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296 /** |
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297 * Abstract method which is called after chart creation. It turns an |
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298 * axis' label into a locale specific format. |
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299 * |
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300 * @param axis Axis to adjust. |
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301 * @param local java.util.Locale object used specify the format. |
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302 * |
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303 * @param axis |
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304 */ |
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305 protected void localizeRangeAxis(Axis axis, Locale locale) { |
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306 if (locale == null) |
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307 return; |
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308 |
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309 log.debug( |
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310 "Set language of axis [" + axis.getLabel() + "] " + |
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311 "to " + locale.toString() |
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312 ); |
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313 |
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314 NumberFormat format = NumberFormat.getInstance(locale); |
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315 ((NumberAxis) axis).setNumberFormatOverride(format); |
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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 * Return the maximum y-range of <code>dataset</code>. |
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321 * |
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322 * @param dataset Dataset to be scaned. |
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323 * |
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324 * @return JFreeChart Range object containing min and max y-value. |
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325 */ |
364
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326 public Range getMaxRangeOfDataset(XYDataset dataset) { |
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327 int seriesCount = dataset.getSeriesCount(); |
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328 double upper = Double.NEGATIVE_INFINITY; |
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329 double lower = Double.POSITIVE_INFINITY; |
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330 |
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331 for (int i = 0; i < seriesCount; i++) { |
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332 int itemCount = dataset.getItemCount(i); |
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333 |
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334 for (int j = 0; j < itemCount; j++) { |
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335 Number num = dataset.getY(i, j); |
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336 |
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337 if (num != null) { |
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338 double y = num.doubleValue(); |
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339 lower = y < lower ? y : lower; |
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340 upper = y > upper ? y : upper; |
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341 } |
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342 } |
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343 } |
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344 |
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345 return new Range(lower, upper); |
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346 } |
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347 |
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348 |
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349 /** |
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350 * Return the maximum y-range of <code>dataset</code> with a margin of |
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351 * <code>percent</code> percent. |
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352 * |
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353 * @param dataset Dataset to be scaned. |
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354 * |
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355 * @return JFreeChart Range object containing min and max y-value with a |
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356 * margin. |
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357 */ |
364
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358 public Range getMaxRangeOfDatasetWithMargin( |
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359 XYDataset dataset, |
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360 double percent |
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361 ) { |
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362 Range range = getMaxRangeOfDataset(dataset); |
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363 double length = range.getLength(); |
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364 double upper = range.getUpperBound() + length /100 * percent; |
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365 double lower = range.getLowerBound() - length /100 * percent; |
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366 |
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367 return new Range(lower, upper); |
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368 } |
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369 |
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370 |
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371 /** |
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372 * Method to find a parameter specified by its value. |
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373 * |
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374 * @param label Search string. |
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375 * |
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376 * @return Value of a parameter with the given label. |
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377 */ |
334
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378 protected String findParameter(String label) { |
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379 Iterator iter = parameters.iterator(); |
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380 |
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381 while (iter.hasNext()) { |
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382 KeyValueDescibeData data = (KeyValueDescibeData) iter.next(); |
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383 String key = data.getValue(); |
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384 |
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385 if (label.indexOf(key) > -1) |
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386 return key; |
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387 } |
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388 |
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389 return label; |
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390 } |
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391 |
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392 |
767
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393 /** |
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394 * Method to find a description of a given collection of values. |
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395 * |
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396 * @param values Collection to be scaned. |
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397 * @param id Identifier and search string of the searched value. |
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398 * |
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399 * @return title |
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400 */ |
297
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401 protected String findValueTitle(Collection values, String id) { |
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402 log.debug("find description of dataset"); |
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403 |
307
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404 if (values != null){ |
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405 Iterator it = values.iterator(); |
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406 while (it.hasNext()) { |
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407 KeyValueDescibeData data = (KeyValueDescibeData) it.next(); |
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408 |
307
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409 if (id.equals(data.getKey())) |
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410 return data.getValue(); |
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411 } |
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412 } |
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413 return ""; |
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414 } |
364
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Workarround: Store lower and upper bounds of data while iterating over all data and set the max range of axes with these information. JFreeCharts method NumberAxis.setAutoRange(true) doesn't seem to work properly.
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415 |
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Workarround: Store lower and upper bounds of data while iterating over all data and set the max range of axes with these information. JFreeCharts method NumberAxis.setAutoRange(true) doesn't seem to work properly.
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416 |
767
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417 /** |
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418 * Method to store the maximum range. Since we need to adjust the range of |
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419 * each range axis, we have to memorize its range - each parameter uses an |
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420 * own range axis. |
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421 * |
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422 * @param ranges Map where ranges of each axis will be stored in. |
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423 * @param value A given value on an axis. |
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424 * @param parameter Parameter name which belongs to <code>value</code>. |
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425 */ |
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426 protected void storeMaxRange(Map ranges, double value, String parameter) { |
364
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427 Range range = null; |
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428 |
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429 range = ranges.containsKey(parameter) |
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430 ? (Range) ranges.get(parameter) |
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431 : new Range(value, value); |
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432 |
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433 double lower = range.getLowerBound(); |
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434 double upper = range.getUpperBound(); |
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435 |
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Workarround: Store lower and upper bounds of data while iterating over all data and set the max range of axes with these information. JFreeCharts method NumberAxis.setAutoRange(true) doesn't seem to work properly.
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436 lower = value < lower ? value : lower; |
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437 upper = value > upper ? value : upper; |
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438 |
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Workarround: Store lower and upper bounds of data while iterating over all data and set the max range of axes with these information. JFreeCharts method NumberAxis.setAutoRange(true) doesn't seem to work properly.
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439 ranges.put(parameter, new Range(lower, upper)); |
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Workarround: Store lower and upper bounds of data while iterating over all data and set the max range of axes with these information. JFreeCharts method NumberAxis.setAutoRange(true) doesn't seem to work properly.
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440 } |
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441 } |
315
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442 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |