NullPointerException while matix transformation

[Dmitrij Sakara <dm...@epfl.ch>]

Hi all,

I have the following code for transformation element coordinates to
screen:
 
Element root = svgElement.getOwnerDocument().getDocumentElement();
SVGMatrix matrix = ((SVGTransformable)
svgElement).getTransformToElement((SVGElement) root);
SVGPoint p = new SVGOMPoint(0, 0);
p = p.matrixTransform(matrix);
 
I receive the nullPointerException during the matrixTransform execution
 
java.lang.NullPointerException
            at
org.apache.batik.dom.svg.SVGLocatableSupport$4.getAffineTransform(Unknow
n Source)
            at org.apache.batik.dom.svg.AbstractSVGMatrix.getA(Unknown
Source)
            at
org.apache.batik.dom.svg.SVGOMPoint.matrixTransform(Unknown Source)
 
Variables matrix and p are not null. What can be a problem?




___________________________________________
 
Dmitrij SAKARA

STI IPR LICP
Swiss Federal Institute of Technology (EPFL)
Me - Ecublens
CH-1015 Lausanne
Switzerland
 
Tel. : +41 (0)21 / 693 5913
Fax. : +41 (0)21 / 693 3509

e-mail : dmitrij.sakara@epfl.ch

My office at EPFL: http://map.epfl.ch/?room=MEA1382
___________________________________________


---------------------------------------------------------------------
To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
For additional commands, e-mail: batik-users-help@xml.apache.org

Re: NullPointerException while matix transformation

[Thomas DeWeese <Th...@Kodak.com>]

Hi Dmitrij,

    Most likely svgElement is no in the rendering tree.
This generally means that it either has 'display="none"' or
is in a 'defs' section.

    The other possibility is that the document is not setup
to be 'dynamic' - which using the SVG DOM requires.

    We should really check this in the call to getTransformToElement,
but we don't.

Dmitrij Sakara wrote:

> Hi all,
> 
> I have the following code for transformation element coordinates to
> screen:
>  
> Element root = svgElement.getOwnerDocument().getDocumentElement();
> SVGMatrix matrix = ((SVGTransformable)
> svgElement).getTransformToElement((SVGElement) root);
> SVGPoint p = new SVGOMPoint(0, 0);
> p = p.matrixTransform(matrix);
>  
> I receive the nullPointerException during the matrixTransform execution
>  
> java.lang.NullPointerException
>             at
> org.apache.batik.dom.svg.SVGLocatableSupport$4.getAffineTransform(Unknow
> n Source)
>             at org.apache.batik.dom.svg.AbstractSVGMatrix.getA(Unknown
> Source)
>             at
> org.apache.batik.dom.svg.SVGOMPoint.matrixTransform(Unknown Source)
>  
> Variables matrix and p are not null. What can be a problem?


---------------------------------------------------------------------
To unsubscribe, e-mail: batik-users-unsubscribe@xml.apache.org
For additional commands, e-mail: batik-users-help@xml.apache.org