Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 321:a4376fd23f99
Implemented svg export of charts.
gnv-artifacts/trunk@383 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Mon, 30 Nov 2009 14:18:37 +0000 |
| parents | 18302372703f |
| children | a88e15972c72 |
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| 320:18302372703f | 321:a4376fd23f99 |
|---|---|
| 11 import java.awt.Transparency; | 11 import java.awt.Transparency; |
| 12 import java.awt.Graphics2D; | 12 import java.awt.Graphics2D; |
| 13 import java.awt.geom.Rectangle2D; | 13 import java.awt.geom.Rectangle2D; |
| 14 import java.awt.geom.Rectangle2D.Double; | 14 import java.awt.geom.Rectangle2D.Double; |
| 15 import java.io.OutputStream; | 15 import java.io.OutputStream; |
| 16 import java.io.OutputStreamWriter; | |
| 16 import java.io.IOException; | 17 import java.io.IOException; |
| 18 import java.io.UnsupportedEncodingException; | |
| 17 import javax.imageio.ImageIO; | 19 import javax.imageio.ImageIO; |
| 18 | 20 |
| 21 import org.apache.batik.dom.svg.SVGDOMImplementation; | |
| 22 import org.apache.batik.svggen.SVGGraphics2D; | |
| 23 import org.apache.batik.svggen.SVGGraphics2DIOException; | |
| 19 import org.apache.log4j.Logger; | 24 import org.apache.log4j.Logger; |
| 20 | 25 |
| 21 import org.jfree.chart.JFreeChart; | 26 import org.jfree.chart.JFreeChart; |
| 22 | 27 |
| 23 | 28 |
| 25 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> | 30 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> |
| 26 */ | 31 */ |
| 27 public class ChartExportHelper { | 32 public class ChartExportHelper { |
| 28 | 33 |
| 29 private static final String DEFAULT_PAGE_SIZE = "A4"; | 34 private static final String DEFAULT_PAGE_SIZE = "A4"; |
| 35 private static final String DEFAULT_ENCODING = "UTF-8"; | |
| 30 | 36 |
| 31 private static Logger log = Logger.getLogger(ChartExportHelper.class); | 37 private static Logger log = Logger.getLogger(ChartExportHelper.class); |
| 32 | 38 |
| 33 public static void exportImage( | 39 public static void exportImage( |
| 34 OutputStream out, | 40 OutputStream out, |
| 49 out | 55 out |
| 50 ); | 56 ); |
| 51 } | 57 } |
| 52 | 58 |
| 53 | 59 |
| 54 public static void exportSVG() { | 60 public static void exportSVG( |
| 55 log.info("export chart as svg (not implemented yet)"); | 61 OutputStream out, |
| 62 JFreeChart chart, | |
| 63 String encoding, | |
| 64 int width, | |
| 65 int height | |
| 66 ) { | |
| 67 log.info("export chart as svg"); | |
| 68 | |
| 69 if (encoding == null) | |
| 70 encoding = DEFAULT_ENCODING; | |
| 71 | |
| 72 SVGDOMImplementation svgDom = new SVGDOMImplementation(); | |
| 73 org.w3c.dom.Document document = svgDom.createDocument(null,"svg",null); | |
| 74 SVGGraphics2D graphics = new SVGGraphics2D(document); | |
| 75 | |
| 76 chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,width,height)); | |
| 77 | |
| 78 try { | |
| 79 graphics.stream(new OutputStreamWriter(out, encoding)); | |
| 80 } | |
| 81 catch (SVGGraphics2DIOException svge) { | |
| 82 log.error("Error while writing svg export to output stream.", svge); | |
| 83 } | |
| 84 catch (UnsupportedEncodingException uee) { | |
| 85 log.error("Unsupported encoding: " + encoding, uee); | |
| 86 } | |
| 56 } | 87 } |
| 57 | 88 |
| 58 | 89 |
| 59 public static void exportPDF( | 90 public static void exportPDF( |
| 60 OutputStream out, | 91 OutputStream out, |