The SVGGraphics2D implementation only exports to SVG the regular Java 2D Paint object. The RadialGradientPaint is a Batik extension and unfortunately its export has not be coded in the SVGGraphics2D. However it should be quite simple to add such a support, you can even do it from the outside by subclassing the DefaultExtensionHandler and redefining the handlePaint() method such that it creates the right SVGPaintDescriptor for the RadialGradientPaint.
Hope this helps.
Nielsen, Clinton wrote:
Help...
Can you explain to me why this displays correctly on the screen, (ie a blue dot and a red ball) but when I export it to a file, it just ends up being two blue balls. How do I export a RadialGradientPaint to SVG?
I'm currently using batik-1.5beta4b along with the jdk1.3.1_07 in a windows environment (windows 2000 Pro).
Following is a sample application containing the code that is not working...
please respond to me at [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>. Thank you for your help
import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
import org.apache.batik.ext.awt.RadialGradientPaint;
//******* for the SVGWriter
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.batik.dom.GenericDOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.DOMImplementation;
public class TrivialApplication {
private MyFrame myFrame;
public static void main(String args[]) {
//******* Set Up Frame
//**********************************************
JFrame myFrame = new MyFrame();
myFrame.setLocation(new Point(250,250));
myFrame.setSize(new Dimension(100,100));
myFrame.setTitle("MTA");
myFrame.setVisible(true);
myFrame.repaint();
//******* Export
//**********************************************
DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation(); Document domFactory= domImpl.createDocument(null, "svg", null);
org.apache.batik.svggen.SVGGeneratorContext ctx =
org.apache.batik.svggen.SVGGeneratorContext.createDefault(domFactory);
ctx.setComment("Generated with Batik SVG Generator");
SVGGraphics2D svgGenerator = new SVGGraphics2D(ctx, false); myFrame.paint(svgGenerator);
svgGenerator.setSVGCanvasSize(new Dimension(150,150));
String useCssStr = System.getProperty("useCss", "true");
try{
svgGenerator.stream(
new java.io.OutputStreamWriter(
new java.io.FileOutputStream(
new java.io.File("testsvg.svg")),"UTF-8"),
useCssStr.equalsIgnoreCase("true"));
}catch(java.io.UnsupportedEncodingException e1){}
catch(org.apache.batik.svggen.SVGGraphics2DIOException e2){}
catch(java.io.FileNotFoundException e3){}
}
}
public class MyFrame extends JFrame{
public void MyFrame(){
}
public void paint(Graphics g){
//******* Blue Dot
//**********************************************
g.setColor(Color.blue);
g.fillOval(30,30,20,20);
//******* Red Ball
//**********************************************
Graphics2D g2 = (Graphics2D)g;
Ellipse2D e = new Ellipse2D.Double(40,40,53,53);
float[] dist = {0, 1};
Color[] colors = {Color.white, Color.red};
RadialGradientPaint rgp = new RadialGradientPaint(new Point2D.Double(60,60),30, dist, colors);
g2.setPaint(rgp);
g2.fill(e);
}
}
-- Christophe
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