Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractHistogram.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.chart; | |
| 10 | |
| 11 import java.util.Locale; | |
| 12 | |
| 13 import org.apache.log4j.Logger; | |
| 14 | |
| 15 import org.jfree.chart.ChartFactory; | |
| 16 import org.jfree.chart.ChartTheme; | |
| 17 import org.jfree.chart.JFreeChart; | |
| 18 | |
| 19 import org.jfree.chart.axis.NumberAxis; | |
| 20 import org.jfree.chart.axis.TickUnitSource; | |
| 21 | |
| 22 import org.jfree.chart.plot.PlotOrientation; | |
| 23 import org.jfree.chart.plot.XYPlot; | |
| 24 | |
| 25 import org.jfree.chart.renderer.xy.XYBarRenderer; | |
| 26 | |
| 27 /** | |
| 28 * This abstract class defines some methods to adjust chart settings after its | |
| 29 * creation. | |
| 30 * | |
| 31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 32 */ | |
| 33 public abstract class AbstractHistogram | |
| 34 implements Chart | |
| 35 { | |
| 36 /** | |
| 37 * Logger used for logging with Apache log4j. | |
| 38 */ | |
| 39 private Logger logger = Logger.getLogger(AbstractHistogram.class); | |
| 40 | |
| 41 /** | |
| 42 * JFreeChart chart stored at this place after chart creation. | |
| 43 */ | |
| 44 protected JFreeChart chart; | |
| 45 | |
| 46 /** | |
| 47 * Labels used for chart title, subtitle, axis description. | |
| 48 */ | |
| 49 protected ChartLabels labels; | |
| 50 | |
| 51 /** | |
| 52 * Theme which is used to adjust the styling of this chart. | |
| 53 */ | |
| 54 protected ChartTheme theme; | |
| 55 | |
| 56 /** | |
| 57 * Raw data which should be displayed in the chart. | |
| 58 */ | |
| 59 protected Object[] data; | |
| 60 | |
| 61 /** | |
| 62 * Locale object used for i18n support. | |
| 63 */ | |
| 64 protected Locale locale; | |
| 65 | |
| 66 | |
| 67 /** | |
| 68 * Constructor for creating histogram charts. | |
| 69 * | |
| 70 * @param labels See {@link #labels} | |
| 71 * @param data See {@link #data} | |
| 72 * @param theme See {@link #theme} | |
| 73 */ | |
| 74 public AbstractHistogram( | |
| 75 ChartLabels labels, Object[] data, ChartTheme theme | |
| 76 ) { | |
| 77 this.labels = labels; | |
| 78 this.data = data; | |
| 79 this.theme = theme; | |
| 80 } | |
| 81 | |
| 82 | |
| 83 /** | |
| 84 * @see de.intevation.gnv.chart.Chart#generateChart() | |
| 85 */ | |
| 86 public JFreeChart generateChart() { | |
| 87 | |
| 88 if (chart != null) | |
| 89 return chart; | |
| 90 | |
| 91 chart = ChartFactory.createHistogram( | |
| 92 labels.getTitle(), | |
| 93 labels.getDomainAxisLabel(), | |
| 94 labels.getRangeAxisLabel(), | |
| 95 null, | |
| 96 PlotOrientation.VERTICAL, | |
| 97 true, | |
| 98 false, | |
| 99 false); | |
| 100 | |
| 101 applyDatasets(); | |
| 102 | |
| 103 theme.apply(chart); | |
| 104 adjustPlot(); | |
| 105 adjustDomainAxis(chart); | |
| 106 adjustRangeAxis(chart); | |
| 107 | |
| 108 return chart; | |
| 109 } | |
| 110 | |
| 111 | |
| 112 /** | |
| 113 * Method to do some changes in plot settings. | |
| 114 */ | |
| 115 protected void adjustPlot() { | |
| 116 XYPlot plot = (XYPlot) chart.getPlot(); | |
| 117 XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer(); | |
| 118 | |
| 119 renderer.setShadowVisible(false); | |
| 120 renderer.setSeriesVisibleInLegend(0, false); | |
| 121 } | |
| 122 | |
| 123 | |
| 124 protected void adjustDomainAxis(JFreeChart chart) { | |
| 125 XYPlot plot = (XYPlot) chart.getPlot(); | |
| 126 NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis(); | |
| 127 | |
| 128 TickUnitSource tus = domainAxis.createStandardTickUnits(locale); | |
| 129 domainAxis.setStandardTickUnits(tus); | |
| 130 } | |
| 131 | |
| 132 | |
| 133 protected void adjustRangeAxis(JFreeChart chart) { | |
| 134 XYPlot plot = (XYPlot) chart.getPlot(); | |
| 135 NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); | |
| 136 | |
| 137 TickUnitSource tus = rangeAxis.createStandardTickUnits(locale); | |
| 138 rangeAxis.setStandardTickUnits(tus); | |
| 139 } | |
| 140 | |
| 141 | |
| 142 | |
| 143 | |
| 144 /** | |
| 145 * This method needs to be implemented by subclasses and should add valid | |
| 146 * <code>HistogramDataset</code> objects to the created chart. It is called | |
| 147 * by {@link #generateChart} after chart creation. | |
| 148 */ | |
| 149 protected abstract void applyDatasets(); | |
| 150 } | |
| 151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |