Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractXYLineChart.java @ 1082:3c0fd3c2fd6b

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Enabled histogram creation for vectorial horizontalprofiles. gnv-artifacts/trunk@1184 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 09 Jun 2010 09:58:38 +0000
parents 22c18083225e
children 5207d09e4af6
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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5 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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7 import java.awt.Color;
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9 import java.awt.geom.Ellipse2D;
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11 import java.text.NumberFormat;
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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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18 import org.apache.log4j.Logger;
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20 import org.jfree.chart.ChartFactory;
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21 import org.jfree.chart.JFreeChart;
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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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28 import org.jfree.chart.plot.PlotOrientation;
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29 import org.jfree.chart.plot.XYPlot;
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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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35 import org.jfree.data.Range;
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37 import org.jfree.data.general.Series;
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39 import org.jfree.data.xy.XYDataset;
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41 import org.jfree.ui.RectangleInsets;
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43 /**
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44 * This abstract class defines some methods to adjust chart settings after its
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45 * creation.
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46 *
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47 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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48 */
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49 public abstract class AbstractXYLineChart
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50 extends AbstractChart
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51 {
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52 /**
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53 * Constant field used to expand the area between data and chart border. Its
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54 * value is {@value}.<br>
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55 * A value of 0.05 equals 5 percent.
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56 */
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57 public static final double LOWER_MARGIN = 0.05D;
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58
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59 /**
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60 * Constant field used to expand the area between data and chart border. Its
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61 * value is {@value}.<br>
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62 * A value of 0.05 equals 5 percent.
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63 */
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64 public static final double UPPER_MARGIN = 0.05D;
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65
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66 /**
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67 * Logger used to log with log4j.
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68 */
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69 private static Logger log = Logger.getLogger(AbstractXYLineChart.class);
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71 /**
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72 * Field of supported colors used for lines and data points in charts.
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73 */
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74 protected static Color[] COLOR = {
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75 Color.black, Color.red, Color.green, Color.blue, Color.yellow,
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76 Color.gray, Color.orange, Color.pink, Color.cyan
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77 };
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78
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79 /**
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80 * Static field to remember the index of the previously used color.
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81 */
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82 protected static int nextColor = 0;
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84 /**
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85 * Default <code>PlotOrientation</code>.
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86 */
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87 protected PlotOrientation PLOT_ORIENTATION = PlotOrientation.VERTICAL;
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89 /**
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90 * Map to store datasets for each parameter.
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91 */
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92 protected Map datasets;
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94 /**
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95 * Map to store max ranges of each parameter (axis.setAutoRange(true)
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96 * doesn't seem to work */
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97 protected Map ranges;
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99 /**
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100 * This method is called by <code>Chart</code> to bring the data into the
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101 * right form fitting to JFreeChart objects.
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102 */
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103 protected abstract void initData();
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105 /**
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106 * Add a value of <code>row</code> to <code>series</code>.
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107 *
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108 * @param row <code>Result</code> Object returned from database. Contains
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109 * a value used to add to <code>series</code>
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110 * @param series A JFreeChart Series object.
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111 */
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112 protected abstract void addValue(Result row, Series series);
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114 /**
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115 * Add <code>series</code> to JFreeChart's Dataset object currently which is
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116 * processing.
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117 *
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118 * @param series Series to add.
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119 * @param label Label used show in legend.
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120 * @param idx Currently not used.
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121 */
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122 protected abstract void addSeries(Series series, String label, int idx);
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123
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124 /**
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125 * Abstract method which is called by <code>Chart</code> interface after
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126 * chart creation. It turns an axis' label into a locale specific format.
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127 *
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128 * @param axis Axis to adjust.
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129 * @param locale java.util.Locale object used specify the format.
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130 */
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131 protected abstract void localizeDomainAxis(Axis axis, Locale locale);
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132
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133 /**
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134 * Abstract method to create a label for a series of parameters.
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135 *
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136 * @param breakPoint1 Identifier returned from database. These identifier
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137 * are used to identify the results from database which are all stored in
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138 * one big java.util.Collection.
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139 * @param breakPoint2 Identifier returned from database.
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140 * @param breakPoint3 Identifier returned from database.
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141 *
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142 * @return Concatinated string of parameter name and measurement.
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143 */
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144 protected abstract String createSeriesName(
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145 String breakPoint1,
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146 String breakPoint2,
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147 String breakPoint3
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148 );
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149
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150
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151 /**
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152 * @see de.intevation.gnv.chart.Chart#generateChart()
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153 */
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154 public JFreeChart generateChart() {
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155 log.debug("generate XYLineChart");
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156 nextColor = 0;
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157
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158 if (chart != null)
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159 return chart;
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160
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161 initChart();
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162
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163 chart.addSubtitle(new TextTitle(labels.getSubtitle()));
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164
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165 theme.apply(chart);
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166 initData();
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167
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168 adjustPlot((XYPlot)chart.getPlot());
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169
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170 return chart;
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171 }
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172
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173
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174 protected void initChart() {
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175 chart = ChartFactory.createXYLineChart(
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176 labels.getTitle(),
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177 labels.getDomainAxisLabel(),
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178 null,
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179 null,
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180 PLOT_ORIENTATION,
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181 true,
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182 false,
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183 false
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184 );
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185 }
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186
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187
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188 /**
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189 * Method used to adjust the axes after chart generation. Methods for i18n
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190 * support ({@link #localizeDomainAxis} and {@link #localizeRangeAxis}) are
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191 * called and axes of this series are expanded.
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192 *
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193 * @param seriesKey Identifier of an axis which have to be adjusted.
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194 * @param idx Set the axis identified by <code>seriesKey</code> to position
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195 * <code>idx</code>.
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196 */
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197 protected void prepareAxis(String seriesKey, int idx) {
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198 log.debug("prepare axis of xychart");
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199
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200 XYPlot plot = chart.getXYPlot();
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201 Axis xAxis = plot.getDomainAxis();
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202 NumberAxis yAxis = new NumberAxis(seriesKey);
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203
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204 localizeDomainAxis(xAxis, locale);
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205 localizeRangeAxis(yAxis, locale);
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206
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207 // litte workarround to adjust the max range of axes.
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208 // NumberAxis.setAutoRange(true) doesn't seem to work properly.
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209 Range yRange = (Range) ranges.get(seriesKey);
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210 yAxis.setRange(Range.expand(yRange, LOWER_MARGIN, UPPER_MARGIN));
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211 log.debug("Max Range of dataset is: " + yRange.toString());
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212
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213 if (seriesKey.contains("richtung")) {
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214 yAxis.setTickUnit(new NumberTickUnit(30.0));
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215 yAxis.setUpperBound(360.0);
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216 yAxis.setLowerBound(0.0);
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217 }
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218 else {
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219 yAxis.setFixedDimension(10.0);
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220 yAxis.setAutoRangeIncludesZero(false);
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221 }
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222
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223 plot.setRangeAxis(idx, yAxis);
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224 yAxis.configure();
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225
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226 if (idx % 2 != 0)
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227 plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_RIGHT);
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228 else
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229 plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_LEFT);
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230
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231 plot.mapDatasetToRangeAxis(idx, idx);
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232 }
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233
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234
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235 /**
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236 * Method to adjust the rendering of a series in a chart. Line color and
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237 * symbols of vertices are configured here.
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238 *
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239 * @param idx Position of the renderer.
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240 * @param seriesCount Maximum number of series in this chart.
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241 * @param renderLines Lines are displayed if true, otherwise they are not.
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242 * @param renderShapes Vertices are displayed if true, otherwise they are
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243 * not.
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244 */
327
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245 protected void adjustRenderer(
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246 int idx,
334
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247 int seriesCount,
327
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248 boolean renderLines,
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249 boolean renderShapes
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250 ) {
334
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251 log.debug("Adjust render of series");
327
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252 XYLineAndShapeRenderer renderer = null;
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253 XYPlot plot = chart.getXYPlot();
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254
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255 try {
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256 renderer = (XYLineAndShapeRenderer)((XYLineAndShapeRenderer)
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257 (plot.getRenderer())).clone();
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258 }
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259 catch (CloneNotSupportedException cnse) {
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260 log.warn("Error while cloning renderer.", cnse);
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261 renderer = new XYLineAndShapeRenderer(renderLines, renderShapes);
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262 renderer.setBaseShape(new Ellipse2D.Double(-2,-2,4,4));
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263 }
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264
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265 for (int i = 0; i < seriesCount; i++) {
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266 renderer.setSeriesShape(i, renderer.getSeriesShape(0));
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267 renderer.setSeriesPaint(i, COLOR[nextColor() % COLOR.length]);
334
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268 renderer.setSeriesShapesVisible(i, renderShapes);
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269 renderer.setSeriesLinesVisible(i, renderLines);
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270 }
297
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271 plot.setRenderer(idx, renderer);
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272 }
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273
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274
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275 /**
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276 * @return Index of the next color
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277 */
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278 protected static synchronized int nextColor() {
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279 return nextColor++;
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280 }
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281
297
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282
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283 /**
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284 * Method to adjust the plot rendering. Disable horizontal grid lines if
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285 * <code>plot</code> contains only a single y-axis.
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286 *
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287 * @param plot JFreeChart Plot object to be adjusted.
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288 */
344
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289 protected void adjustPlot(XYPlot plot) {
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290 if (plot.getRangeAxisCount() > 1)
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291 plot.setRangeGridlinesVisible(false);
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292
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293 plot.setAxisOffset(new RectangleInsets(0, 0, 0, 15));
344
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294 }
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295
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296
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297 /**
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298 * Abstract method which is called after chart creation. It turns an
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299 * axis' label into a locale specific format.
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300 *
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301 * @param axis Axis to adjust.
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302 * @param locale java.util.Locale object used specify the format.
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303 *
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304 */
315
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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 * @param percent Percent used to expand the range.
767
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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
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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 */
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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
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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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415
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416
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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 */
656
b98d1adee7a6 Added an offset of five percent between values and chart border in vertical profile charts (issue186).
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426 protected void storeMaxRange(Map ranges, double value, String parameter) {
364
2413273f1c13 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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427 Range range = null;
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428
2413273f1c13 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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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
2413273f1c13 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;
2413273f1c13 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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438
2413273f1c13 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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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 :
http://dive4elements.wald.intevation.org