Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 323:a88e15972c72

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Updated Batik library to 1.7 gnv-artifacts/trunk@386 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 30 Nov 2009 15:04:26 +0000
parents a4376fd23f99
children 3d13fa281a7e
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.OutputStreamWriter;
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17 import java.io.IOException;
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18 import java.io.UnsupportedEncodingException;
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19 import javax.imageio.ImageIO;
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20
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21 import org.apache.batik.svggen.SVGGraphics2D;
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22 import org.apache.batik.svggen.SVGGraphics2DIOException;
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23 import org.apache.log4j.Logger;
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24
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25 import org.jfree.chart.JFreeChart;
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26
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27 import de.intevation.artifactdatabase.XMLUtils;
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28
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29
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30 /**
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31 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
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32 */
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33 public class ChartExportHelper {
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34
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35 private static final String DEFAULT_PAGE_SIZE = "A4";
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36 private static final String DEFAULT_ENCODING = "UTF-8";
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37
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38 private static Logger log = Logger.getLogger(ChartExportHelper.class);
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39
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40 public static void exportImage(
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41 OutputStream out,
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42 JFreeChart chart,
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43 String format,
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44 int width,
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45 int height
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46 )
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47 throws IOException
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48 {
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49 log.info("export chart as png");
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50
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51 ImageIO.write(
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52 chart.createBufferedImage(
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53 width, height, Transparency.BITMASK, null
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54 ),
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55 format,
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56 out
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57 );
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58 }
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59
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60
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61 public static void exportSVG(
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62 OutputStream out,
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63 JFreeChart chart,
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64 String encoding,
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65 int width,
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66 int height
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67 ) {
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68 log.info("export chart as svg");
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69
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70 if (encoding == null)
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71 encoding = DEFAULT_ENCODING;
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72
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73 org.w3c.dom.Document document = XMLUtils.newDocument();
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74 SVGGraphics2D graphics = new SVGGraphics2D(document);
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75
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76 chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,width,height));
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77
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78 try {
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79 graphics.stream(new OutputStreamWriter(out, encoding));
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80 }
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81 catch (SVGGraphics2DIOException svge) {
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82 log.error("Error while writing svg export to output stream.", svge);
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83 }
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84 catch (UnsupportedEncodingException uee) {
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85 log.error("Unsupported encoding: " + encoding, uee);
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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 public static void exportPDF(
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91 OutputStream out,
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92 JFreeChart chart,
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93 String pageFormat,
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94 boolean landscape,
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95 float marginLeft,
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96 float marginRight,
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97 float marginTop,
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98 float marginBottom
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99 ) {
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100 log.info("export chart as pdf.");
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101
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102 if (pageFormat == null)
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103 pageFormat = DEFAULT_PAGE_SIZE;
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104
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105 Rectangle page = PageSize.getRectangle(pageFormat);
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106 int pageWidth = (int) (page.getRight(marginRight) - page.getLeft(marginLeft));
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107 int pageHeight = (int) (page.getTop(marginTop) - page.getBottom(marginBottom));
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108
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109 Document document = null;
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110 if (landscape) {
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111 document = new Document(page.rotate());
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112 log.debug("Create landscape pdf.");
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113 }
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114 else
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115 document = new Document(page);
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116
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117 try {
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118 PdfWriter writer = PdfWriter.getInstance(document, out);
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119
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120 document.addSubject(chart.getTitle().getText());
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121 document.addCreationDate();
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122 document.open();
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123
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124 PdfContentByte content = writer.getDirectContent();
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125
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126 int width = 0;
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127 int height = 0;
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128 if (landscape) {
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129 width = pageHeight;
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130 height = pageWidth;
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131 }
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132 else {
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133 width = pageWidth;
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134 height = pageHeight;
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135 }
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136
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137 PdfTemplate template = content.createTemplate(width, height);
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138 Graphics2D graphics = template.createGraphics(width, height);
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139 Rectangle2D area = new Rectangle2D.Double(0.0D, 0.0D,width,height);
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140
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141 chart.draw(graphics, area);
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142 graphics.dispose();
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143 content.addTemplate(template, marginLeft, marginBottom);
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144 }
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145 catch (DocumentException de) {
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146 log.error("Error while exporting chart to pdf.", de);
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147 }
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148 finally {
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149 document.close();
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150 }
318
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151 }
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152 }
320
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153 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org