Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartHelper.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/exports/ChartHelper.java@bd047b71ab37
children 4897a58c8746
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
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1 package org.dive4elements.river.exports;
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2
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3 import org.jfree.data.Range;
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4 import org.jfree.data.xy.XYDataset;
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5 import org.jfree.data.xy.XYSeriesCollection;
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6 import org.jfree.data.time.RegularTimePeriod;
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7 import org.jfree.data.time.TimeSeriesCollection;
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8 import org.jfree.data.time.TimeSeries;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.dive4elements.river.jfree.Bounds;
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13 import org.dive4elements.river.jfree.DoubleBounds;
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14 import org.dive4elements.river.jfree.TimeBounds;
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15
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16
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17 /**
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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19 */
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20 public class ChartHelper {
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21
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22 private static final Logger logger = Logger.getLogger(ChartHelper.class);
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23
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24
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25 /**
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26 * This method returns the ranges of the XYDataset <i>dataset</i> as array
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27 * with [xrange, yrange].
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28 *
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29 * @param dataset The dataset which should be evaluated.
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30 *
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31 * @return an array with x and y ranges.
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32 */
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33 public static Bounds[] getBounds(XYSeriesCollection dataset) {
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34 int seriesCount = dataset != null ? dataset.getSeriesCount() : 0;
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35
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36 if (seriesCount == 0) {
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37 logger.warn("Dataset is empty or has no Series set.");
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38 return null;
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39 }
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40
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41 boolean foundValue = false;
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42
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43 double minX = Double.MAX_VALUE;
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44 double maxX = -Double.MAX_VALUE;
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45 double minY = Double.MAX_VALUE;
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46 double maxY = -Double.MAX_VALUE;
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47
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48 for (int i = 0, m = seriesCount; i < m; i++) {
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49 for (int j = 0, n = dataset.getItemCount(i); j < n; j++) {
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50 double x = dataset.getXValue(i, j);
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51 double y = dataset.getYValue(i, j);
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52
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53 if (Double.isNaN(x) || Double.isNaN(y)) {
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54 logger.warn("Item " + j + " in Series " + i + " is broken");
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55 continue;
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56 }
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57
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58 foundValue = true;
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59
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60 if (x < minX) {
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61 minX = x;
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62 }
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63
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64 if (x > maxX) {
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65 maxX = x;
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66 }
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67
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68 if (y < minY) {
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69 minY = y;
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70 }
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71
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72 if (y > maxY) {
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73 maxY = y;
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74 }
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75 }
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76 }
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77
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78 return foundValue
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79 ? new Bounds[] {
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80 new DoubleBounds(minX, maxX),
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81 new DoubleBounds(minY, maxY) }
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82 : null;
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83 }
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84
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85
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86 public static Bounds[] getBounds(XYDataset dataset) {
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87 if (dataset instanceof XYSeriesCollection) {
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88 return getBounds((XYSeriesCollection) dataset);
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89 }
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90 else if(dataset instanceof TimeSeriesCollection) {
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91 return getBounds((TimeSeriesCollection) dataset);
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92 }
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93 else {
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94 logger.warn("Unknown XYDataset instance: " + dataset.getClass());
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95 return null;
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96 }
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97 }
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98
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99
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100 public static Bounds[] getBounds(TimeSeriesCollection collection) {
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101 int seriesCount = collection != null ? collection.getSeriesCount() : 0;
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102
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103 if (seriesCount == 0) {
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104 logger.warn("TimeSeriesCollection is empty or has no Series set.");
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105 return null;
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106 }
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107
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108 boolean foundValue = false;
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109
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110 long lowerX = Long.MAX_VALUE;
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111 long upperX = -Long.MAX_VALUE;
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112
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113 double lowerY = Double.MAX_VALUE;
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114 double upperY = -Double.MAX_VALUE;
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115
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116 for (int i = 0, m = seriesCount; i < m; i++) {
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117 TimeSeries series = collection.getSeries(i);
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118
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119 for (int j = 0, n = collection.getItemCount(i); j < n; j++) {
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120 RegularTimePeriod rtp = series.getTimePeriod(j);
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121
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122 if (rtp == null) {
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123 continue;
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124 }
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125
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126 foundValue = true;
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127
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128 long start = rtp.getFirstMillisecond();
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129 long end = rtp.getLastMillisecond();
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130
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131 if (start < lowerX) {
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132 lowerX = start;
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133 }
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134
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135 if (end > upperX) {
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136 upperX = end;
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137 }
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138
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139 double y = series.getValue(j).doubleValue();
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140
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141 lowerY = Math.min(lowerY, y);
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142 upperY = Math.max(upperY, y);
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143 }
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144 }
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145
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146 if (foundValue) {
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147 return new Bounds[] {
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148 new TimeBounds(lowerX, upperX),
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149 new DoubleBounds(lowerY, upperY)
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150 };
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151 }
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152
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153 return null;
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154 }
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155
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156
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157 /**
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158 * Expand bounds by percent.
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159 *
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160 * @param bounds The bounds to expand.
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161 * @param percent The percentage to expand.
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162 *
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163 * @return a new, expanded bounds.
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164 */
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165 public static Bounds expandBounds(Bounds bounds, double percent) {
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166 if (bounds == null) {
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167 return null;
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168 }
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169
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170 double value = (Double) bounds.getLower();
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171 double expand = Math.abs(value / 100 * percent);
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172
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173 return expand != 0
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174 ? new DoubleBounds(value-expand, value+expand)
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175 : new DoubleBounds(-0.01 * percent, 0.01 * percent);
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176 }
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177
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178
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179 /**
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180 * Expand range by percent.
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181 *
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182 * @param range The range to expand.
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183 * @param percent The percentage to expand.
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184 *
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185 * @return a new, expanded range.
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186 */
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187 public static Range expandRange(Range range, double percent) {
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188 if (range == null) {
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189 return null;
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190 }
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191
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192 double value = range.getLowerBound();
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193 double expand = Math.abs(value / 100 * percent);
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194
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195 return expand != 0
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196 ? new Range(value-expand, value+expand)
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197 : new Range(-0.01 * percent, 0.01 * percent);
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198 }
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199 }
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200 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org