Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 320:18302372703f
Implemented pdf export of charts.
gnv-artifacts/trunk@381 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 30 Nov 2009 09:51:59 +0000 |
parents | 5f2820e821e0 |
children | a4376fd23f99 |
rev | line source |
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1 package de.intevation.gnv.exports; |
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2 |
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3 import com.lowagie.text.Document; |
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4 import com.lowagie.text.DocumentException; |
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5 import com.lowagie.text.PageSize; |
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6 import com.lowagie.text.Rectangle; |
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7 import com.lowagie.text.pdf.PdfContentByte; |
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8 import com.lowagie.text.pdf.PdfTemplate; |
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9 import com.lowagie.text.pdf.PdfWriter; |
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10 |
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11 import java.awt.Transparency; |
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12 import java.awt.Graphics2D; |
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13 import java.awt.geom.Rectangle2D; |
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14 import java.awt.geom.Rectangle2D.Double; |
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15 import java.io.OutputStream; |
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16 import java.io.IOException; |
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17 import javax.imageio.ImageIO; |
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18 |
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19 import org.apache.log4j.Logger; |
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20 |
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21 import org.jfree.chart.JFreeChart; |
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22 |
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23 |
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24 /** |
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25 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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26 */ |
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27 public class ChartExportHelper { |
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28 |
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29 private static final String DEFAULT_PAGE_SIZE = "A4"; |
318
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30 |
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31 private static Logger log = Logger.getLogger(ChartExportHelper.class); |
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32 |
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33 public static void exportImage( |
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34 OutputStream out, |
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35 JFreeChart chart, |
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36 String format, |
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37 int width, |
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38 int height |
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39 ) |
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40 throws IOException |
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41 { |
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42 log.info("export chart as png"); |
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43 |
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44 ImageIO.write( |
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45 chart.createBufferedImage( |
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46 width, height, Transparency.BITMASK, null |
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47 ), |
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48 format, |
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49 out |
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50 ); |
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51 } |
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52 |
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53 |
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54 public static void exportSVG() { |
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55 log.info("export chart as svg (not implemented yet)"); |
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56 } |
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57 |
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58 |
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59 public static void exportPDF( |
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60 OutputStream out, |
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61 JFreeChart chart, |
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62 String pageFormat, |
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63 boolean landscape, |
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64 float marginLeft, |
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65 float marginRight, |
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66 float marginTop, |
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67 float marginBottom |
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68 ) { |
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69 log.info("export chart as pdf."); |
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70 |
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71 if (pageFormat == null) |
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72 pageFormat = DEFAULT_PAGE_SIZE; |
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73 |
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74 Rectangle page = PageSize.getRectangle(pageFormat); |
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75 int pageWidth = (int) (page.getRight(marginRight) - page.getLeft(marginLeft)); |
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76 int pageHeight = (int) (page.getTop(marginTop) - page.getBottom(marginBottom)); |
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77 |
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78 Document document = null; |
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79 if (landscape) { |
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80 document = new Document(page.rotate()); |
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81 log.debug("Create landscape pdf."); |
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82 } |
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83 else |
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84 document = new Document(page); |
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85 |
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86 try { |
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87 PdfWriter writer = PdfWriter.getInstance(document, out); |
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88 |
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89 document.addSubject(chart.getTitle().getText()); |
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90 document.addCreationDate(); |
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91 document.open(); |
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92 |
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93 PdfContentByte content = writer.getDirectContent(); |
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94 |
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95 int width = 0; |
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96 int height = 0; |
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97 if (landscape) { |
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98 width = pageHeight; |
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99 height = pageWidth; |
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100 } |
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101 else { |
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102 width = pageWidth; |
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103 height = pageHeight; |
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104 } |
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105 |
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106 PdfTemplate template = content.createTemplate(width, height); |
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107 Graphics2D graphics = template.createGraphics(width, height); |
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108 Rectangle2D area = new Rectangle2D.Double(0.0D, 0.0D,width,height); |
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109 |
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110 chart.draw(graphics, area); |
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111 graphics.dispose(); |
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112 content.addTemplate(template, marginLeft, marginBottom); |
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113 } |
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114 catch (DocumentException de) { |
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115 log.error("Error while exporting chart to pdf.", de); |
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116 } |
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117 finally { |
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118 document.close(); |
18302372703f
Implemented pdf export of charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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119 } |
318
5f2820e821e0
Implemented a helper class for exporting charts. Adapted code.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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120 } |
5f2820e821e0
Implemented a helper class for exporting charts. Adapted code.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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121 } |
320
18302372703f
Implemented pdf export of charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
318
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122 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |