Thanks but my program generated same errors.
example:
in a main program
import org.w3c.dom.*;
import org.w3c.dom.svg.*;
import java.io.*;
import org.apache.batik.dom.*;
import org.apache.batik.dom.util.*;
import org.apache.batik.dom.svg.*;
import org.apache.batik.util.*;
public class TestSVG
{
public static void main(String[] args)
{
DOMImplementation impl = (SVGDOMImplementation)
SVGDOMImplementation.getDOMImplementation();
String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
SVGDocument svgDoc = (SVGDocument)(impl.createDocument
(svgNS, "svg", null));
SVGSVGElement root = svgDoc.getRootElement();
SVGOMTextElement t1 = (SVGOMTextElement)svgDoc.createElementNS
(svgNS, SVGConstants.SVG_TEXT_TAG);
t1.setAttribute(SVGConstants.SVG_X_ATTRIBUTE, "80");
t1.setAttribute(SVGConstants.SVG_Y_ATTRIBUTE, "100");
t1.setAttribute(SVGConstants.CSS_FONT_SIZE_PROPERTY, "12");
t1.setAttribute(SVGConstants.CSS_FONT_FAMILY_PROPERTY, "times");
t1.setAttribute(SVGConstants.CSS_FILL_PROPERTY, "yellow");
Text text1 = svgDoc.createTextNode("hello world");
t1.appendChild(text1);
root.appendChild(t1);
// now I want t1 width/height in pixel
// but follow row of my code generate error
System.out.println("t1="+((SVGOMTextElement)t1).getBBox().gettWidth
());
// the error is
java.lang.NullPointerException
at org.apache.batik.dom.svg.SVGLocatableSupport$1.getWidth
(Unknown Source)
at sisvg2.TestSVG.main(TestSVG.java:31)
Exception in thread "main"
// but if i use
System.out.println("t1="+((SVGOMTextElement)t1).getBBox());
runtime print [EMAIL PROTECTED]
What is my errors.
Thanks a lot from Alessandro (italy)
--- In [email protected], Holger Will <[EMAIL PROTECTED]>
wrote:
> Peruzzi Alessandro wrote:
>
> >
> > Hi.
> > I've a problem.
> > I'd like to know how many pixel have a <text> element in a
specific
> > font-family and font-width
> >
> > example:
> > <text font-family="verdana" font-width="10">Hello world</text>
> >
> > Hello world how many pixel in width or in height effectly ?
> >
> > Thanks a lot.
> >
> > Alessandro Peruzzi
>
> Hi Alessandro
> you could use getBBox() or getComputedTextLength()
> id say use getBBox().
> cheers
> Holger
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