Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartHelper.java @ 7167:2fd238b681a9

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Add debug output triggered by debugging the last commit
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 26 Sep 2013 12:22:01 +0200
parents af13ceeba52a
children e4606eae8ea5
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
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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
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9 package org.dive4elements.river.exports;
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10
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11 import org.jfree.data.Range;
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12 import org.jfree.data.xy.XYDataset;
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13 import org.jfree.data.xy.XYSeriesCollection;
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14 import org.jfree.data.time.RegularTimePeriod;
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15 import org.jfree.data.time.TimeSeriesCollection;
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16 import org.jfree.data.time.TimeSeries;
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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.dive4elements.river.jfree.Bounds;
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21 import org.dive4elements.river.jfree.DoubleBounds;
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22 import org.dive4elements.river.jfree.TimeBounds;
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23
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24
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25 /**
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26 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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27 */
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28 public class ChartHelper {
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29
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30 private static final Logger logger = Logger.getLogger(ChartHelper.class);
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31
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32
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33 /**
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34 * This method returns the ranges of the XYDataset <i>dataset</i> as array
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35 * with [xrange, yrange].
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36 *
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37 * @param dataset The dataset which should be evaluated.
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38 *
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39 * @return an array with x and y ranges.
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40 */
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41 public static Bounds[] getBounds(XYSeriesCollection dataset) {
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42 int seriesCount = dataset != null ? dataset.getSeriesCount() : 0;
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43
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44 if (seriesCount == 0) {
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45 logger.warn("Dataset is empty or has no Series set.");
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46 return null;
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47 }
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48
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49 boolean foundValue = false;
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50
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51 double minX = Double.MAX_VALUE;
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52 double maxX = -Double.MAX_VALUE;
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53 double minY = Double.MAX_VALUE;
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54 double maxY = -Double.MAX_VALUE;
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55
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56 for (int i = 0, m = seriesCount; i < m; i++) {
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57 for (int j = 0, n = dataset.getItemCount(i); j < n; j++) {
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58 double x = dataset.getXValue(i, j);
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59 double y = dataset.getYValue(i, j);
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60
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61 if (Double.isNaN(x) || Double.isNaN(y)) {
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62 logger.warn("Item " + j + " in Series " + i + " is broken");
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63 continue;
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64 }
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65
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66 foundValue = true;
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67
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68 if (x < minX) {
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69 minX = x;
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70 }
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71
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72 if (x > maxX) {
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73 maxX = x;
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74 }
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75
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76 if (y < minY) {
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77 minY = y;
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78 }
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79
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80 if (y > maxY) {
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81 maxY = y;
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82 }
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83 }
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84 }
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85
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86 return foundValue
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87 ? new Bounds[] {
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88 new DoubleBounds(minX, maxX),
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89 new DoubleBounds(minY, maxY) }
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90 : null;
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91 }
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92
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93
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94 public static Bounds[] getBounds(XYDataset dataset) {
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95 if (dataset instanceof XYSeriesCollection) {
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96 return getBounds((XYSeriesCollection) dataset);
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97 }
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98 else if(dataset instanceof TimeSeriesCollection) {
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99 return getBounds((TimeSeriesCollection) dataset);
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100 }
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101 else {
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102 logger.warn("Unknown XYDataset instance: " + dataset.getClass());
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103 return null;
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104 }
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105 }
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106
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107
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108 public static Bounds[] getBounds(TimeSeriesCollection collection) {
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109 int seriesCount = collection != null ? collection.getSeriesCount() : 0;
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110
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111 if (seriesCount == 0) {
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112 logger.warn("TimeSeriesCollection is empty or has no Series set.");
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113 return null;
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114 }
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115
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116 boolean foundValue = false;
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117
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118 long lowerX = Long.MAX_VALUE;
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119 long upperX = -Long.MAX_VALUE;
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120
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121 double lowerY = Double.MAX_VALUE;
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122 double upperY = -Double.MAX_VALUE;
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123
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124 for (int i = 0, m = seriesCount; i < m; i++) {
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125 TimeSeries series = collection.getSeries(i);
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126
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127 for (int j = 0, n = collection.getItemCount(i); j < n; j++) {
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128 RegularTimePeriod rtp = series.getTimePeriod(j);
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129
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130 if (rtp == null) {
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131 continue;
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132 }
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133
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134 foundValue = true;
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135
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136 long start = rtp.getFirstMillisecond();
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137 long end = rtp.getLastMillisecond();
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138
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139 if (start < lowerX) {
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140 lowerX = start;
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141 }
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142
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143 if (end > upperX) {
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144 upperX = end;
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145 }
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146
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147 double y = series.getValue(j).doubleValue();
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148
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149 lowerY = Math.min(lowerY, y);
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150 upperY = Math.max(upperY, y);
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151 }
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152 }
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153
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154 if (foundValue) {
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155 return new Bounds[] {
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156 new TimeBounds(lowerX, upperX),
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157 new DoubleBounds(lowerY, upperY)
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158 };
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159 }
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160
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161 return null;
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162 }
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163
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164
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165 /**
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166 * Expand bounds by percent.
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167 *
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168 * @param bounds The bounds to expand.
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169 * @param percent The percentage to expand.
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170 *
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171 * @return a new, expanded bounds.
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172 */
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173 public static Bounds expandBounds(Bounds bounds, double percent) {
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174 if (bounds == null) {
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175 return null;
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176 }
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177
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178 double value = (Double) bounds.getLower();
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179 double expand = Math.abs(value / 100 * percent);
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180
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181 return expand != 0
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182 ? new DoubleBounds(value-expand, value+expand)
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183 : new DoubleBounds(-0.01 * percent, 0.01 * percent);
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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 * Expand range by percent.
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189 *
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190 * @param range The range to expand.
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191 * @param percent The percentage to expand.
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192 *
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193 * @return a new, expanded range.
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194 */
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195 public static Range expandRange(Range range, double percent) {
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196 if (range == null) {
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197 return null;
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198 }
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199
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200 double value = range.getLowerBound();
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201 double expand = Math.abs(value / 100 * percent);
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202
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203 return expand != 0
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204 ? new Range(value-expand, value+expand)
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205 : new Range(-0.01 * percent, 0.01 * percent);
2237
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206 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
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207 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
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208 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org