Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 392:72177020db92
Improved the transition model and added classes to enable the WINFO artifact to create computed discharge curves - NOTE: each of the new classes is just a stub.
flys-artifacts/trunk@1817 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 04 May 2011 07:48:39 +0000 |
parents | 60f63539d004 |
children | 0385bcc4229a |
rev | line source |
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369
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parents:
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.awt.Color; |
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4 |
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5 import java.io.IOException; |
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6 |
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7 import org.apache.log4j.Logger; |
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8 |
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9 import org.jfree.chart.ChartFactory; |
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10 import org.jfree.chart.JFreeChart; |
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11 import org.jfree.chart.axis.NumberAxis; |
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12 import org.jfree.chart.plot.PlotOrientation; |
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13 import org.jfree.chart.plot.XYPlot; |
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14 |
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15 import de.intevation.flys.exports.ChartExportHelper; |
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16 |
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17 |
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18 /** |
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19 * An abstract base class for creating XY charts. |
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20 * |
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21 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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22 */ |
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23 public abstract class XYChartGenerator extends ChartGenerator { |
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24 |
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25 /** The logger that is used in this generator.*/ |
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26 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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27 |
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28 |
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29 /** |
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30 * Returns the title of a chart. |
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31 * |
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32 * @return the title of a chart. |
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33 */ |
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34 protected abstract String getChartTitle(); |
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35 |
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36 /** |
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37 * Returns the X-Axis label of a chart. |
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38 * |
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39 * @return the X-Axis label of a chart. |
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40 */ |
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41 protected abstract String getXAxisLabel(); |
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42 |
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43 /** |
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44 * Returns the Y-Axis label of a chart. |
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45 * |
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46 * @return the Y-Axis label of a chart. |
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47 */ |
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48 protected abstract String getYAxisLabel(); |
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49 |
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50 /** |
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51 * This method is called to add all datasets of a concrete XYChartGenerator |
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52 * to the JFreeChart. |
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53 * |
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54 * @param chart The JFreeChart object. |
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55 */ |
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56 protected abstract void addDatasets(JFreeChart chart); |
369
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57 |
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58 |
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59 public void generate() |
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60 throws IOException |
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61 { |
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62 logger.debug("XYChartGenerator.generate"); |
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63 |
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64 JFreeChart chart = ChartFactory.createXYLineChart( |
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65 getChartTitle(), |
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66 getXAxisLabel(), |
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67 getYAxisLabel(), |
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68 null, |
369
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69 PlotOrientation.VERTICAL, |
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70 true, |
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71 false, |
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72 false); |
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73 |
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74 chart.setBackgroundPaint(Color.WHITE); |
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75 chart.getPlot().setBackgroundPaint(Color.WHITE); |
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76 |
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77 addDatasets(chart); |
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78 |
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79 adjustAxes((XYPlot) chart.getPlot()); |
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80 |
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81 ChartExportHelper.exportImage( |
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82 out, |
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83 chart, |
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84 "png", |
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85 600, 400); |
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86 } |
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87 |
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88 |
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89 /** |
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90 * Adjusts the axes of a plot. |
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91 * |
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92 * @param plot The XYPlot of the chart. |
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93 */ |
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94 protected void adjustAxes(XYPlot plot) { |
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95 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis(); |
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96 |
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97 yAxis.setAutoRangeIncludesZero(false); |
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98 } |
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99 } |
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100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |