Hi Mark.
Mark Fortner:
> I'm trying to create an SVG-based widget system using batik. I've created a
> proof-of-concept app, but I'm having problems getting the widget to display
> without a background color. I've used the information in the following bug
> report to set the alpha to 0 (
> http://issues.apache.org/bugzilla/show_bug.cgi?id=40392) but that doesn't
> seem to fix the problem.
It works for me. Here is an example that displays a semi-transparent
JSVGCanvas above another component:
// -- TransparentCanvas.java --
import java.awt.Color;
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.OverlayLayout;
import javax.swing.SwingConstants;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.swing.JSVGCanvas;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.svg.SVGDocument;
public class TransparentCanvas {
public static void main(String[] args) {
JFrame frame = new JFrame("Transparent JSVGCanvas test");
frame.setSize(400, 300);
Container contentPane = frame.getContentPane();
contentPane.setLayout(new OverlayLayout(contentPane));
JLabel label = new JLabel("A JLabel behind the JSVGCanvas",
SwingConstants.CENTER);
contentPane.add(label);
JSVGCanvas canvas = new JSVGCanvas();
canvas.setBackground(new Color(0, true));
canvas.setSVGDocument(buildDocument());
contentPane.add(canvas);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
private static SVGDocument buildDocument() {
DOMImplementation di =
SVGDOMImplementation.getDOMImplementation();
String SVGNS = "http://www.w3.org/2000/svg";;
Document doc = di.createDocument(SVGNS, "svg", null);
Element svg = doc.getDocumentElement();
svg.setAttributeNS(null, "viewBox", "0 0 100 100");
Element circle = doc.createElementNS(SVGNS, "circle");
circle.setAttributeNS(null, "cx", "50");
circle.setAttributeNS(null, "cy", "50");
circle.setAttributeNS(null, "r", "50");
circle.setAttributeNS(null, "fill", "yellow");
circle.setAttributeNS(null, "fill-opacity", "0.5");
svg.appendChild(circle);
return (SVGDocument) doc;
}
}
--
Cameron McCormack, http://mcc.id.au/
xmpp:[EMAIL PROTECTED] ▪ ICQ 26955922 ▪ MSN [EMAIL PROTECTED]
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