Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java @ 2394:02ac373b6d69
Added chart helper function to determine the min and max bounds (x and y) for TimeSeriesCollections.
flys-artifacts/trunk@4016 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Fri, 10 Feb 2012 08:43:06 +0000 |
| parents | 2b232871ba28 |
| children | bece6f604899 |
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| 2393:d0e7afb3696b | 2394:02ac373b6d69 |
|---|---|
| 1 package de.intevation.flys.exports; | 1 package de.intevation.flys.exports; |
| 2 | 2 |
| 3 import org.jfree.data.Range; | 3 import org.jfree.data.Range; |
| 4 import org.jfree.data.xy.XYDataset; | 4 import org.jfree.data.xy.XYDataset; |
| 5 import org.jfree.data.time.RegularTimePeriod; | |
| 6 import org.jfree.data.time.TimeSeriesCollection; | |
| 7 import org.jfree.data.time.TimeSeries; | |
| 5 | 8 |
| 6 import org.apache.log4j.Logger; | 9 import org.apache.log4j.Logger; |
| 10 | |
| 11 import de.intevation.flys.jfree.Bounds; | |
| 12 import de.intevation.flys.jfree.DoubleBounds; | |
| 13 import de.intevation.flys.jfree.TimeBounds; | |
| 7 | 14 |
| 8 | 15 |
| 9 /** | 16 /** |
| 10 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | 17 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
| 11 */ | 18 */ |
| 71 ? new Range[] { new Range(minX, maxX), new Range(minY, maxY) } | 78 ? new Range[] { new Range(minX, maxX), new Range(minY, maxY) } |
| 72 : null; | 79 : null; |
| 73 } | 80 } |
| 74 | 81 |
| 75 | 82 |
| 83 public static Bounds[] getBounds(TimeSeriesCollection collection) { | |
| 84 int seriesCount = collection != null ? collection.getSeriesCount() : 0; | |
| 85 | |
| 86 if (seriesCount == 0) { | |
| 87 logger.warn("TimeSeriesCollection is empty or has no Series set."); | |
| 88 return null; | |
| 89 } | |
| 90 | |
| 91 boolean foundValue = false; | |
| 92 | |
| 93 long lowerX = Long.MAX_VALUE; | |
| 94 long upperX = -Long.MAX_VALUE; | |
| 95 | |
| 96 double lowerY = Double.MAX_VALUE; | |
| 97 double upperY = -Double.MAX_VALUE; | |
| 98 | |
| 99 for (int i = 0, m = seriesCount; i < m; i++) { | |
| 100 TimeSeries series = collection.getSeries(i); | |
| 101 | |
| 102 for (int j = 0, n = collection.getItemCount(i); j < n; j++) { | |
| 103 RegularTimePeriod rtp = series.getTimePeriod(j); | |
| 104 | |
| 105 if (rtp == null) { | |
| 106 continue; | |
| 107 } | |
| 108 | |
| 109 foundValue = true; | |
| 110 | |
| 111 long start = rtp.getFirstMillisecond(); | |
| 112 long end = rtp.getLastMillisecond(); | |
| 113 | |
| 114 if (start < lowerX) { | |
| 115 lowerX = start; | |
| 116 } | |
| 117 | |
| 118 if (end > upperX) { | |
| 119 upperX = end; | |
| 120 } | |
| 121 | |
| 122 double y = series.getValue(j).doubleValue(); | |
| 123 | |
| 124 lowerY = Math.min(lowerY, y); | |
| 125 upperY = Math.max(upperY, y); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 if (foundValue) { | |
| 130 return new Bounds[] { | |
| 131 new TimeBounds(lowerX, upperX), | |
| 132 new DoubleBounds(lowerY, upperY) | |
| 133 }; | |
| 134 } | |
| 135 | |
| 136 return null; | |
| 137 } | |
| 138 | |
| 139 | |
| 76 /** | 140 /** |
| 77 * Expand range by percent. | 141 * Expand range by percent. |
| 78 * | 142 * |
| 79 * @param range The range to expand. | 143 * @param range The range to expand. |
| 80 * @param percent The percentage to expand. | 144 * @param percent The percentage to expand. |