Mercurial > dive4elements > gnv-client

comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 320:18302372703f

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Implemented pdf export of charts. gnv-artifacts/trunk@381 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 30 Nov 2009 09:51:59 +0000
parents 5f2820e821e0
children a4376fd23f99
comparison
equal deleted inserted replaced
319:251f16a083f8 320:18302372703f
1 package de.intevation.gnv.exports; 1 package de.intevation.gnv.exports;
2 2
3 import com.lowagie.text.Document;
4 import com.lowagie.text.DocumentException;
5 import com.lowagie.text.PageSize;
6 import com.lowagie.text.Rectangle;
7 import com.lowagie.text.pdf.PdfContentByte;
8 import com.lowagie.text.pdf.PdfTemplate;
9 import com.lowagie.text.pdf.PdfWriter;
10
3 import java.awt.Transparency; 11 import java.awt.Transparency;
4 import java.awt.image.BufferedImage; 12 import java.awt.Graphics2D;
13 import java.awt.geom.Rectangle2D;
14 import java.awt.geom.Rectangle2D.Double;
5 import java.io.OutputStream; 15 import java.io.OutputStream;
6 import java.io.IOException; 16 import java.io.IOException;
7 import javax.imageio.ImageIO; 17 import javax.imageio.ImageIO;
8 18
9 import org.apache.log4j.Logger; 19 import org.apache.log4j.Logger;
10 20
11 import org.jfree.chart.JFreeChart; 21 import org.jfree.chart.JFreeChart;
12 22
23
13 /** 24 /**
14 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> 25 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
15 */ 26 */
16 public class ChartExportHelper { 27 public class ChartExportHelper {
17 28
18 private static final String DEFAULT_PAGE_SIZE = "A4"; 29 private static final String DEFAULT_PAGE_SIZE = "A4";
19 30
20 private static Logger log = Logger.getLogger(ChartExportHelper.class); 31 private static Logger log = Logger.getLogger(ChartExportHelper.class);
21 32
22 public static void exportImage( 33 public static void exportImage(
23 OutputStream out, 34 OutputStream out,
37 format, 48 format,
38 out 49 out
39 ); 50 );
40 } 51 }
41 52
53
42 public static void exportSVG() { 54 public static void exportSVG() {
43 log.info("export chart as svg (not implemented yet)"); 55 log.info("export chart as svg (not implemented yet)");
44 } 56 }
45 57
46 public static void exportPDF() { 58
47 log.info("export chart as pdf (not implemented yet)"); 59 public static void exportPDF(
60 OutputStream out,
61 JFreeChart chart,
62 String pageFormat,
63 boolean landscape,
64 float marginLeft,
65 float marginRight,
66 float marginTop,
67 float marginBottom
68 ) {
69 log.info("export chart as pdf.");
70
71 if (pageFormat == null)
72 pageFormat = DEFAULT_PAGE_SIZE;
73
74 Rectangle page = PageSize.getRectangle(pageFormat);
75 int pageWidth = (int) (page.getRight(marginRight) - page.getLeft(marginLeft));
76 int pageHeight = (int) (page.getTop(marginTop) - page.getBottom(marginBottom));
77
78 Document document = null;
79 if (landscape) {
80 document = new Document(page.rotate());
81 log.debug("Create landscape pdf.");
82 }
83 else
84 document = new Document(page);
85
86 try {
87 PdfWriter writer = PdfWriter.getInstance(document, out);
88
89 document.addSubject(chart.getTitle().getText());
90 document.addCreationDate();
91 document.open();
92
93 PdfContentByte content = writer.getDirectContent();
94
95 int width = 0;
96 int height = 0;
97 if (landscape) {
98 width = pageHeight;
99 height = pageWidth;
100 }
101 else {
102 width = pageWidth;
103 height = pageHeight;
104 }
105
106 PdfTemplate template = content.createTemplate(width, height);
107 Graphics2D graphics = template.createGraphics(width, height);
108 Rectangle2D area = new Rectangle2D.Double(0.0D, 0.0D,width,height);
109
110 chart.draw(graphics, area);
111 graphics.dispose();
112 content.addTemplate(template, marginLeft, marginBottom);
113 }
114 catch (DocumentException de) {
115 log.error("Error while exporting chart to pdf.", de);
116 }
117 finally {
118 document.close();
119 }
48 } 120 }
49 } 121 }
122 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
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