Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractHistogram.java @ 875:5e9efdda6894
merged gnv-artifacts/1.0
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:56 +0200 |
| parents | 79401c871da4 |
| children | 86ca3c10523f |
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| 722:bb3ffe7d719e | 875:5e9efdda6894 |
|---|---|
| 1 package de.intevation.gnv.chart; | |
| 2 | |
| 3 import java.util.Locale; | |
| 4 | |
| 5 import org.apache.log4j.Logger; | |
| 6 | |
| 7 import org.jfree.chart.ChartFactory; | |
| 8 import org.jfree.chart.ChartTheme; | |
| 9 import org.jfree.chart.JFreeChart; | |
| 10 | |
| 11 import org.jfree.chart.plot.PlotOrientation; | |
| 12 import org.jfree.chart.plot.XYPlot; | |
| 13 | |
| 14 import org.jfree.chart.renderer.xy.XYBarRenderer; | |
| 15 | |
| 16 /** | |
| 17 * This abstract class defines some methods to adjust chart settings after its | |
| 18 * creation. | |
| 19 * | |
| 20 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 21 */ | |
| 22 public abstract class AbstractHistogram | |
| 23 implements Chart | |
| 24 { | |
| 25 /** | |
| 26 * Logger used for logging with Apache log4j. | |
| 27 */ | |
| 28 private Logger logger = Logger.getLogger(AbstractHistogram.class); | |
| 29 | |
| 30 /** | |
| 31 * JFreeChart chart stored at this place after chart creation. | |
| 32 */ | |
| 33 protected JFreeChart chart; | |
| 34 | |
| 35 /** | |
| 36 * Labels used for chart title, subtitle, axis description. | |
| 37 */ | |
| 38 protected ChartLabels labels; | |
| 39 | |
| 40 /** | |
| 41 * Theme which is used to adjust the styling of this chart. | |
| 42 */ | |
| 43 protected ChartTheme theme; | |
| 44 | |
| 45 /** | |
| 46 * Raw data which should be displayed in the chart. | |
| 47 */ | |
| 48 protected Object[] data; | |
| 49 | |
| 50 /** | |
| 51 * Locale object used for i18n support. | |
| 52 */ | |
| 53 protected Locale locale; | |
| 54 | |
| 55 | |
| 56 /** | |
| 57 * Constructor for creating histogram charts. | |
| 58 * | |
| 59 * @param labels See {@link #labels} | |
| 60 * @param data See {@link #data} | |
| 61 * @param theme See {@link #theme} | |
| 62 */ | |
| 63 public AbstractHistogram( | |
| 64 ChartLabels labels, Object[] data, ChartTheme theme | |
| 65 ) { | |
| 66 this.labels = labels; | |
| 67 this.data = data; | |
| 68 this.theme = theme; | |
| 69 } | |
| 70 | |
| 71 | |
| 72 /** | |
| 73 * @see de.intevation.gnv.chart.Chart#generateChart() | |
| 74 */ | |
| 75 public JFreeChart generateChart() { | |
| 76 | |
| 77 if (chart != null) | |
| 78 return chart; | |
| 79 | |
| 80 chart = ChartFactory.createHistogram( | |
| 81 labels.getTitle(), | |
| 82 labels.getDomainAxisLabel(), | |
| 83 labels.getRangeAxisLabel(), | |
| 84 null, | |
| 85 PlotOrientation.VERTICAL, | |
| 86 true, | |
| 87 false, | |
| 88 false); | |
| 89 | |
| 90 applyDatasets(); | |
| 91 | |
| 92 theme.apply(chart); | |
| 93 adjustPlot(); | |
| 94 | |
| 95 return chart; | |
| 96 } | |
| 97 | |
| 98 | |
| 99 /** | |
| 100 * Method to do some changes in plot settings. | |
| 101 */ | |
| 102 protected void adjustPlot() { | |
| 103 XYPlot plot = (XYPlot) chart.getPlot(); | |
| 104 XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer(); | |
| 105 | |
| 106 renderer.setShadowVisible(false); | |
| 107 renderer.setSeriesVisibleInLegend(0, false); | |
| 108 } | |
| 109 | |
| 110 | |
| 111 /** | |
| 112 * This method needs to be implemented by subclasses and should add valid | |
| 113 * <code>HistogramDataset</code> objects to the created chart. It is called | |
| 114 * by {@link #generateChart} after chart creation. | |
| 115 */ | |
| 116 protected abstract void applyDatasets(); | |
| 117 } | |
| 118 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |