Re: Read/Write transform values

Batik contains a lot of useful parsers for just such purposes...

http://xmlgraphics.apache.org/batik/using/parsers.html

with the TransformListParser you can produce an AffineTransform

       AffineTransform at = null;
        TransformListParser tlp = new TransformListParser();
        AWTTransformProducer atp = new AWTTransformProducer();
        tlp.setTransformListHandler(atp);
        tlp.parse(el.getAttributeNS(null,
SVGConstants.SVG_TRANSFORM_ATTRIBUTE));
        at = atp.getAffineTransform();




On Fri, Aug 10, 2012 at 3:43 PM, fireball <[email protected]> wrote:

> Maybe this has been discussed before but I could not find one article that
> explains it.
>
> I am trying to figure out the proper way to read/write element's transform
> values. I.e. X, Y, Scale,
> Rotate, etc..
>
> Below is a few things I have tried. Sometimes they work and sometimes they
> don't. And I am not sure which way is correct.
>
> Please point me in the right direction.
>
> Thanks,
>
> fireball.
>
>
>
> Read
> ------
> - X value:
>
>
> ((SVGOMGElement)elt).getTransform().getBaseVal().getItem(0).getMatrix().getE();
> or
> ((SVGLocatable)elt).getScreenCTM().getE();
>
>
> Write
> ------
> - X value:
>
> elt.setAttributeNS(null, "transform", "matrix(" + a + ",0,0," + d + "," + e
> + ",
> " + f + ")");
> or
> ((SVGLocatable)elt).getScreenCTM().setE(e);
>
>
>
> - Rotation angle:
>
>
> ((SVGOMGElement)elt).getTransform().getBaseVal().getItem(0).setRotate(Float.valueOf(rotate),
> Float.valueOf(0), Float.valueOf(0));
> or
> ((SVGLocatable)elt).getScreenCTM().rotate(Float.valueOf(45));
>
> In the above we are setting the rotate value but how do we get(read) it?
>
>
>
> --
> View this message in context:
> http://batik.2283329.n4.nabble.com/Read-Write-transform-values-tp4655190.html
> Sent from the Batik - Users mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [email protected]
> For additional commands, e-mail: [email protected]
>
>