Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/jfree/DoubleBounds.java @ 6955:94cb1845c667

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(issue1452) Coalesce to zero to avoid NaN arithmetic.
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 30 Aug 2013 15:45:14 +0200
parents af13ceeba52a
children ac7cb15e1946
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.jfree;
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10
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11
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12 import org.jfree.chart.axis.ValueAxis;
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13 import org.jfree.chart.axis.LogarithmicAxis;
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14 import org.jfree.data.Range;
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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 DoubleBounds implements Bounds {
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21
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22 protected double lower;
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23 protected double upper;
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24
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25
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26 /**
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27 * Default constructor. <b>A DoubleBounds has always set lower &lt;
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28 * upper!</b>
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29 */
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30 public DoubleBounds(double lower, double upper) {
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31 this.lower = Math.min(lower, upper);
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32 this.upper = Math.max(lower, upper);
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33 }
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34
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35
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36 @Override
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37 public Number getLower() {
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38 return Double.valueOf(lower);
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39 }
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40
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41
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42 @Override
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43 public Number getUpper() {
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44 return Double.valueOf(upper);
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45 }
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46
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47
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48 @Override
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49 public void applyBounds(ValueAxis axis) {
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50 axis.setRange(new Range(lower, upper));
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51 }
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52
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53
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54 /**
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55 * Set extended range to ValueAxis.
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56 * @param percent how many percent to extend (in each direction,
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57 * thus 10 percent on [0,100] -> [-10,110].
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58 */
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59 @Override
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60 public void applyBounds(ValueAxis axis, int percent) {
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61 double space = (upper - lower) / 100 * percent;
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62 if (axis instanceof LogarithmicAxis) {
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63 axis.setRange(new Range(Math.max(lower-space, 0.0001),
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64 Math.max(upper+space, 0.0002)));
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65 } else {
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66 axis.setRange(new Range(lower-space, upper+space));
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67 }
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68 }
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69
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70
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71 @Override
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72 public Bounds combine(Bounds bounds) {
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73 if (bounds == null) {
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74 return this;
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75 }
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76
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77 DoubleBounds other = (DoubleBounds) bounds;
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78
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79 double otherLower = other.getLower().doubleValue();
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80 double otherUpper = other.getUpper().doubleValue();
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81
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82 return new DoubleBounds(
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83 otherLower < lower ? otherLower : lower,
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84 otherUpper > upper ? otherUpper : upper);
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85 }
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86
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87
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88 @Override
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89 public String toString() {
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90 return "DoubleBounds=[" + lower + " ; " + upper + "]";
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91 }
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92 }
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93 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org