Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java @ 4269:0c766c475805

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Add Panel and Tree UI classes for dispayling the measurement station info The new ui classes are using the new extracted base class InfoPanel and InfoTree which are in common with the gauge info.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 26 Oct 2012 12:22:06 +0200
parents b2ea89a665bc
children
rev   line source
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60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.exports;
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2
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
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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 de.intevation.flys.jfree.Bounds;
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13 import de.intevation.flys.jfree.DoubleBounds;
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14 import de.intevation.flys.jfree.TimeBounds;
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15
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16
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
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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 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
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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