Hi all,
I'm using a JSVGComponent in my Swing application and when the SVG document
it is based on uses pixels, such as the following:
<svg width="132.646" height="56.696" viewBox="0 0 132.646 56.696"
xml:space="preserve">
everything is fine. But when it uses points, such as the following:
<svg width="132.646pt" height="56.696pt" viewBox="0 0 132.646 56.696"
xml:space="preserve">
I crash and burn with the following exception trace:
Exception occurred during event dispatching:
java.lang.InternalError: Determinant is 0
at
org.apache.batik.swing.gvt.JGVTComponent.renderGVTTree(JGVTComponent.java:46
0)
at
org.apache.batik.swing.gvt.JGVTComponent.scheduleGVTRendering(JGVTComponent.
java:527)
at
org.apache.batik.swing.gvt.JGVTComponent.setRenderingTransform(JGVTComponent
.java:399)
at mypackage.SVGShape.zoomToSize(SVGShape.java:737)
at mypackage.SVGShape.computeRenderingTransform(SVGShape.java:724)
at
org.apache.batik.swing.gvt.JGVTComponent.setGraphicsNode(JGVTComponent.java:
286)
at
org.apache.batik.swing.svg.JSVGComponent.access$201(JSVGComponent.java:70)
at
org.apache.batik.swing.svg.JSVGComponent$SVGListener.gvtBuildCompleted(JSVGC
omponent.java:499)
at org.apache.batik.swing.svg.GVTTreeBuilder$2.run(GVTTreeBuilder.java:154)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
Now, this image works fine (both with and without the "pt") in the Batik
svg-browser, so obviously I am not doing something that it is doing to
handle non-pixel units correctly. However, I can't figure out what exactly
I need to do.
What I have determined is that my zoomToSize() method below is encountering
an _imageWidth and an _imageHeight of 0, which makes my scaleW and scaleH
have the value of Infinity.
public void zoomToSize() {
double scaleW = ((double)getWidth()) / _imageWidth;
double scaleH = ((double)getHeight()) / _imageHeight;
if (renderingTransform == null) {
renderingTransform = new AffineTransform();
}
renderingTransform.setToScale(scaleW, scaleH);
setRenderingTransform(renderingTransform);
}
The code that sets _imageWidth and _imageHeight (which works with pixels in
the SVG file but not with points) is below.
SVGSVGElement elt = _doc.getRootElement();
try {
float w, h;
_imageWidth = elt.getWidth().getBaseVal().getValue();
_imageHeight = elt.getHeight().getBaseVal().getValue();
But this is where I'm stuck. Has anyone had similar problems? This might
has something to do with the SVGUserAgent. I tried passing in null to get
the default one, and I tried writing my own (whose getPixelToMM() method
returned 0.26458333333333333333333333333333f), and in both cases I get the
same exception. I have also looked through some of the Batik sources but I
can't figure out what it is that they do that I need to do to be able to
handle point measurements correctly but I haven't found it.
Thanks in advance,
Peter Armstrong
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
