Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 423:bab867fb37e8
Charts are generated using the size defined in the incoming request document.
flys-artifacts/trunk@1908 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 12 May 2011 09:11:16 +0000 |
parents | 4de7d9eac10f |
children | 8fa4c5c9cd1a |
rev | line source |
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369
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.awt.BasicStroke; |
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4 import java.awt.Color; |
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5 import java.awt.Stroke; |
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6 |
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7 import java.io.IOException; |
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8 |
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9 import org.apache.log4j.Logger; |
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10 |
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11 import org.jfree.chart.ChartFactory; |
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12 import org.jfree.chart.JFreeChart; |
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13 import org.jfree.chart.axis.NumberAxis; |
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14 import org.jfree.chart.plot.PlotOrientation; |
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15 import org.jfree.chart.plot.XYPlot; |
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16 |
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17 import de.intevation.flys.exports.ChartExportHelper; |
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18 |
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19 |
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20 /** |
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21 * An abstract base class for creating XY charts. |
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22 * |
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23 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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24 */ |
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25 public abstract class XYChartGenerator extends ChartGenerator { |
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26 |
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27 /** The logger that is used in this generator.*/ |
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28 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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29 |
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30 |
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31 public static final Color DEFAULT_GRID_COLOR = Color.GRAY; |
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32 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f; |
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33 |
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34 |
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35 /** |
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36 * Returns the title of a chart. |
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37 * |
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38 * @return the title of a chart. |
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39 */ |
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40 protected abstract String getChartTitle(); |
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41 |
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42 /** |
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43 * Returns the X-Axis label of a chart. |
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44 * |
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45 * @return the X-Axis label of a chart. |
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46 */ |
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47 protected abstract String getXAxisLabel(); |
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48 |
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49 /** |
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50 * Returns the Y-Axis label of a chart. |
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51 * |
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52 * @return the Y-Axis label of a chart. |
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53 */ |
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54 protected abstract String getYAxisLabel(); |
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55 |
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56 /** |
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57 * This method is called to add all datasets of a concrete XYChartGenerator |
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58 * to the JFreeChart. |
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59 * |
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60 * @param chart The JFreeChart object. |
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61 */ |
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62 protected abstract void addDatasets(JFreeChart chart); |
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63 |
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64 |
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65 public void generate() |
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66 throws IOException |
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67 { |
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68 logger.debug("XYChartGenerator.generate"); |
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69 |
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70 JFreeChart chart = ChartFactory.createXYLineChart( |
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71 getChartTitle(), |
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72 getXAxisLabel(), |
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73 getYAxisLabel(), |
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74 null, |
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75 PlotOrientation.VERTICAL, |
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76 true, |
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77 false, |
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78 false); |
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79 |
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80 chart.setBackgroundPaint(Color.WHITE); |
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81 chart.getPlot().setBackgroundPaint(Color.WHITE); |
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82 |
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83 XYPlot plot = (XYPlot) chart.getPlot(); |
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84 |
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85 addDatasets(chart); |
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86 addSubtitles(chart); |
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87 adjustPlot(plot); |
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88 adjustAxes(plot); |
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89 |
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Charts are generated using the size defined in the incoming request document.
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90 int[] size = getSize(); |
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91 |
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92 ChartExportHelper.exportImage( |
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93 out, |
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94 chart, |
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95 "png", |
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96 size[0], size[1]); |
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97 } |
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98 |
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99 |
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100 /** |
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101 * Adjusts the axes of a plot. |
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102 * |
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103 * @param plot The XYPlot of the chart. |
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104 */ |
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105 protected void adjustAxes(XYPlot plot) { |
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106 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis(); |
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107 |
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108 yAxis.setAutoRangeIncludesZero(false); |
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109 } |
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110 |
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111 |
419
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Display gridlines in charts.
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112 protected void adjustPlot(XYPlot plot) { |
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113 Stroke gridStroke = new BasicStroke( |
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114 DEFAULT_GRID_LINE_WIDTH, |
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115 BasicStroke.CAP_BUTT, |
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116 BasicStroke.JOIN_MITER, |
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117 3.0f, |
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118 new float[] { 3.0f }, |
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119 0.0f); |
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Display gridlines in charts.
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120 |
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Display gridlines in charts.
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121 plot.setDomainGridlineStroke(gridStroke); |
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122 plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR); |
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123 plot.setDomainGridlinesVisible(true); |
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124 |
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Display gridlines in charts.
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125 plot.setRangeGridlineStroke(gridStroke); |
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126 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR); |
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127 plot.setRangeGridlinesVisible(true); |
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128 } |
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129 |
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Display gridlines in charts.
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130 |
414
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Added subtitles to the available charts.
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131 protected void addSubtitles(JFreeChart chart) { |
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132 // override this method in subclasses that need subtitles |
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133 } |
369
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Implemented the chart creation of a longitudinal section chart - W and Q facets.
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134 } |
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Implemented the chart creation of a longitudinal section chart - W and Q facets.
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135 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |