Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java @ 2237:60615235e951

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset. flys-artifacts/trunk@3884 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 02 Feb 2012 15:39:28 +0000
parents
children 2b232871ba28
rev   line source
2237
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.exports;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
2
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
3 import org.jfree.data.Range;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
4 import org.jfree.data.xy.XYDataset;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
5
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
6
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
7 /**
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
8 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
9 */
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
10 public class ChartHelper {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
11
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
12 /**
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
13 * This method returns the ranges of the XYDataset <i>dataset</i> as array
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
14 * with [xrange, yrange].
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
15 *
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
16 * @param dataset The dataset which should be evaluated.
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
17 *
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
18 * @return an array with x and y ranges.
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
19 */
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
20 public static Range[] getRanges(XYDataset dataset) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
21 if (dataset == null) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
22 return null;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
23 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
24
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
25 double minX = Double.MAX_VALUE;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
26 double maxX = -Double.MAX_VALUE;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
27 double minY = Double.MAX_VALUE;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
28 double maxY = -Double.MAX_VALUE;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
29
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
30 for (int i = 0, m = dataset.getSeriesCount(); i < m; i++) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
31 for (int j = 0, n = dataset.getItemCount(i); j < n; j++) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
32 double x = dataset.getXValue(i, j);
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
33 double y = dataset.getYValue(i, j);
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
34
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
35 if (x < minX) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
36 minX = x;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
37 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
38
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
39 if (x > maxX) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
40 maxX = x;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
41 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
42
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
43 if (y < minY) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
44 minY = y;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
45 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
46
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
47 if (y > maxY) {
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
48 maxY = y;
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
49 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
50 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
51 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
52
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
53 return new Range[] { new Range(minX, maxX), new Range(minY, maxY) };
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
54 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
55 }
60615235e951 Added a ChartHelper class that currently contains a method to compute the xy ranges of an XYDataset.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
56 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org