Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractHistogram.java @ 1046:026f89df4091

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Added queries for meshes using vectorvalues for horizontalprofiles. gnv-artifacts/trunk@1118 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Fri, 21 May 2010 10:54:29 +0000
parents 79401c871da4
children 86ca3c10523f
rev   line source
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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.ChartFactory;
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8 import org.jfree.chart.ChartTheme;
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9 import org.jfree.chart.JFreeChart;
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10
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11 import org.jfree.chart.plot.PlotOrientation;
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12 import org.jfree.chart.plot.XYPlot;
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13
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14 import org.jfree.chart.renderer.xy.XYBarRenderer;
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15
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16 /**
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17 * This abstract class defines some methods to adjust chart settings after its
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18 * creation.
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19 *
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20 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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21 */
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22 public abstract class AbstractHistogram
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23 implements Chart
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24 {
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25 /**
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26 * Logger used for logging with Apache log4j.
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27 */
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28 private Logger logger = Logger.getLogger(AbstractHistogram.class);
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29
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30 /**
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31 * JFreeChart chart stored at this place after chart creation.
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32 */
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33 protected JFreeChart chart;
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34
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35 /**
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36 * Labels used for chart title, subtitle, axis description.
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37 */
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38 protected ChartLabels labels;
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39
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40 /**
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41 * Theme which is used to adjust the styling of this chart.
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42 */
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43 protected ChartTheme theme;
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44
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45 /**
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46 * Raw data which should be displayed in the chart.
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47 */
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48 protected Object[] data;
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49
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50 /**
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51 * Locale object used for i18n support.
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52 */
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53 protected Locale locale;
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54
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55
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56 /**
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57 * Constructor for creating histogram charts.
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58 *
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59 * @param labels See {@link #labels}
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60 * @param data See {@link #data}
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61 * @param theme See {@link #theme}
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62 */
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63 public AbstractHistogram(
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64 ChartLabels labels, Object[] data, ChartTheme theme
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65 ) {
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66 this.labels = labels;
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67 this.data = data;
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68 this.theme = theme;
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69 }
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70
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71
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72 /**
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73 * @see de.intevation.gnv.chart.Chart#generateChart()
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74 */
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75 public JFreeChart generateChart() {
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76
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77 if (chart != null)
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78 return chart;
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79
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80 chart = ChartFactory.createHistogram(
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81 labels.getTitle(),
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82 labels.getDomainAxisLabel(),
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83 labels.getRangeAxisLabel(),
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84 null,
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85 PlotOrientation.VERTICAL,
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86 true,
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87 false,
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88 false);
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89
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90 applyDatasets();
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91
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92 theme.apply(chart);
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93 adjustPlot();
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94
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95 return chart;
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96 }
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97
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98
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99 /**
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100 * Method to do some changes in plot settings.
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101 */
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102 protected void adjustPlot() {
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103 XYPlot plot = (XYPlot) chart.getPlot();
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104 XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();
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105
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106 renderer.setShadowVisible(false);
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107 renderer.setSeriesVisibleInLegend(0, false);
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108 }
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109
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110
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111 /**
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112 * This method needs to be implemented by subclasses and should add valid
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113 * <code>HistogramDataset</code> objects to the created chart. It is called
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114 * by {@link #generateChart} after chart creation.
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115 */
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116 protected abstract void applyDatasets();
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117 }
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118 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org