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annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 369:2ce7b473620e

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Implemented the chart creation of a longitudinal section chart - W and Q facets. flys-artifacts/trunk@1778 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 29 Apr 2011 10:13:24 +0000
parents
children 60f63539d004
rev   line source
369
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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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 import org.jfree.data.xy.XYDataset;
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15
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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16 import de.intevation.flys.exports.ChartExportHelper;
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17
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18
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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19 /**
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20 * An abstract base class for creating XY charts.
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21 *
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22 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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23 */
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24 public abstract class XYChartGenerator extends ChartGenerator {
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25
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26 /** The logger that is used in this generator.*/
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27 private static Logger logger = Logger.getLogger(ChartGenerator.class);
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28
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29
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30 /**
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31 * Returns the title of a chart.
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32 *
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33 * @return the title of a chart.
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34 */
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35 protected abstract String getChartTitle();
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36
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37 /**
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38 * Returns the X-Axis label of a chart.
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39 *
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40 * @return the X-Axis label of a chart.
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41 */
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42 protected abstract String getXAxisLabel();
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43
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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44 /**
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45 * Returns the Y-Axis label of a chart.
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46 *
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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47 * @return the Y-Axis label of a chart.
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48 */
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49 protected abstract String getYAxisLabel();
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50
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51 /**
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52 * Returns the XYDataset used to add curves to the chart.
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53 *
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54 * @return the XYDataset used to add curves to the chart.
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55 */
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56 protected abstract XYDataset getXYDataset();
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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 getXYDataset(),
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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 adjustAxes((XYPlot) chart.getPlot());
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78
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79 ChartExportHelper.exportImage(
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80 out,
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81 chart,
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82 "png",
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83 600, 400);
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84 }
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85
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86
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87 /**
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88 * Adjusts the axes of a plot.
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89 *
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90 * @param plot The XYPlot of the chart.
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91 */
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92 protected void adjustAxes(XYPlot plot) {
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93 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
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94
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95 yAxis.setAutoRangeIncludesZero(false);
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96 }
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97 }
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98 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org