I think I found the method getFontMetrics(font) in Java class
java.awt.Graphics
http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Graphics.html
You would be less likely to confuse your readers if you changed the
namespace prefix from FontMetrics to Graphics.
I added -TJ as a parameter but I'm not convinced <oXygen/> is
paying attention to it.
My error message now seems to be the result of my incorrect
use of the method:
Error in call to extension function {public
java.awt.FontMetrics java.awt.Graphics.getFontMetrics()}:
Cannot convert supplied XPath value to the required type for
the extension function.
I have tried several values for $font as well as placing the
font name directly in the parameter list with the same result.
The method is not static, so you will need to create an instance of
java.awt.Graphics and supply it as your first argument. Since it is an
abstract class, you can't do this directly: presumably there is a static
factory method somewhere.
The second argument needs to be an instance of java.awt.Font, whereas you
are supplying a string.
Note that when the Java logic starts to become complex and to involve
several intermediate steps, it's often best to write the method you actually
want in user-written Java code to hide the complexity, so that it becomes a
single function call from the stylesheet.
Michael Kay
http://www.saxonica.com/
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