Hi,
Maybe you have to wait until the rendereing is completed in order to
call the getWidth() function? I had a similar problem and solved it by
sticking the code inside a GVTTreeRendererAdapter, something like:
GVTTreeRendererAdapter gvtadap = new GVTTreeRendererAdapter() {
public void gvtRenderingCompleted(GVTTreeRendererEvent e) {
RunnableQueue rq =
someCanvas.getUpdateManager().getUpdateRunnableQueue();
if (rq != null) {
rq.invokeLater(new Runnable() {
public void run() {
// do your getWidth call here.
}
});
}
}
}
-Randy
-----Original Message-----
From: john doe [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 30, 2003 12:18 PM
To: [EMAIL PROTECTED]
Subject: bbox.getWidth() problem
Hello,
I'm developing a java web application which generates
svg using Batik's SVG DOM library.
Therefore I need to get the width of text elements to
wrap text dynamically while generating the svg
document.
The problem is that when I try to get the bounding box
of a text element a NullPointerException is thrown.
Here is the part of my source code which throws the
exception:
...
if (textElement instanceof SVGLocatable) {
SVGRect bbox = ((SVGLocatable)textElement).getBBox();
System.out.println(bbox.getWidth()); // <-- exception
}
...
Here is the interesting part of the thrown exception:
java.lang.NullPointerException at
org.apache.batik.dom.svg.SVGLocatableSupport$1.getWidth(Unknown
Source)
....
Any help and suggestions to solve the problem is
greatly appreciated!
Thanks,
Stefan
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