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annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 375:60f63539d004

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Ws and Qs of a longitudinal section chart are mapped to an own range axis now. flys-artifacts/trunk@1785 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 02 May 2011 09:41:22 +0000
parents 2ce7b473620e
children 0385bcc4229a
rev   line source
369
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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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 */
375
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56 protected abstract void addDatasets(JFreeChart chart);
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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,
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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
369
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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 :
http://dive4elements.wald.intevation.org