Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/DefaultHistogram.java @ 617:3d13fa281a7e

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Added new ouput mode: histogram. gnv-artifacts/trunk@688 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 15 Feb 2010 11:44:01 +0000
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children 65f09139e9b3
rev   line source
617
3d13fa281a7e Added new ouput mode: histogram.
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1 package de.intevation.gnv.chart;
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2
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3 import java.util.Locale;
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4
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5 import org.apache.log4j.Logger;
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6
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7 import org.jfree.chart.ChartTheme;
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8 import org.jfree.chart.JFreeChart;
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9 import org.jfree.chart.axis.NumberAxis;
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10 import org.jfree.chart.plot.XYPlot;
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11 import org.jfree.chart.renderer.xy.XYBarRenderer;
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12
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13 import org.jfree.data.general.Dataset;
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14 import org.jfree.data.statistics.HistogramDataset;
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15
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16
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17 /**
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18 * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
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19 */
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20 public class DefaultHistogram
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21 extends AbstractHistogram
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22 {
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23 // TODO take a better default value
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24 public static final int DEFAULT_BINS = 15;
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25
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26 private static Logger logger = Logger.getLogger(DefaultHistogram.class);
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27
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28
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29 public DefaultHistogram(
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30 ChartLabels labels, Object[] data, ChartTheme theme
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31 ) {
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32 super(labels, data, theme);
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33 }
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34
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35
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36 protected void applyDatasets() {
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37 XYPlot plot = (XYPlot) chart.getPlot();
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38
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39 // prepare data and create add them to histogram dataset
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40 String name = (String) data[0];
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41 double[] values = toDouble((Double[]) data[1]);
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42
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43 HistogramDataset dataset = new HistogramDataset();
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44 dataset.addSeries(name, values, DEFAULT_BINS);
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45
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46 plot.setDataset(0, dataset);
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47 }
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48
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49
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50 protected double[] toDouble(Double[] array) {
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51 int length = array.length;
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52 double[] values = new double[length];
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53
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54 for(int i = 0; i < length; i++) {
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55 values[i] = array[i].doubleValue();
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56 }
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57
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58 return values;
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59 }
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60 }
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61 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org