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Posted to batik-users@xmlgraphics.apache.org by Maik Schürer proveo GmbH <Ma...@proveo.de> on 2004/11/02 18:57:30 UTC
bounding box exception
after getBBox() from a SVGOMGElement and calling bbox.getWidth() e.g. I get
following exception:
java.lang.NullPointerException
at org.apache.batik.dom.svg.SVGLocatableSupport$1.getX(Unknown Source)
but the bbox itself isn't null
what means 'Unknown Source' ?
Thanks in advance
Maik
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Re: bounding box exception
Posted by Cameron McCormack <ca...@aka.mcc.id.au>.
Maik Schrer proveo GmbH:
> yes, it is a static document
> but why I can not get a bounding box of an element when it comes from static
> document ?
Normally, if you do not have any Java code that will manipulate the SVG
in your JSVGComponent, references to the Java 2D objects which are used
for drawing (and hence their geometry) are not kept. If the document
has no script element or event attributes (and a couple of other cases),
then the document by itself will have no need to keep around these
objects.
But if you use some Java code to manipulate the SVG, it may well need to
keep the objects to allow, for example, bounding box calculations.
Since the JSVGComponent doesn't know if it will be used in this way or
not (unless there are script elements, or event attributes, or ...), it
has the setDocumentState method so that you can tell it to allow such
dynamic interactions to be possible.
Cameron
--
Cameron McCormack
| Web: http://mcc.id.au/
| ICQ: 26955922
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Re: bounding box exception
Posted by Maik Schürer proveo GmbH <Ma...@proveo.de>.
Thanks Cameron (and Tonny),
yes, it is a static document
but why I can not get a bounding box of an element when it comes from static
document ?
Maik
----- Original Message -----
From: "Cameron McCormack" <ca...@aka.mcc.id.au>
To: "Batik Users" <ba...@xml.apache.org>
Sent: Tuesday, November 02, 2004 11:53 PM
Subject: Re: bounding box exception
> Hi Maik.
>
> Maik Schrer proveo GmbH:
> > after getBBox() from a SVGOMGElement and calling bbox.getWidth() e.g. I
get
> > following exception:
> > java.lang.NullPointerException
> > at org.apache.batik.dom.svg.SVGLocatableSupport$1.getX(Unknown Source)
> > but the bbox itself isn't null
> > what means 'Unknown Source' ?
>
> As Tonny said, "Unknown Source" means that you don't have debugging
> information compiled in. But as to the actual problem: it sounds like
> you are trying to get the bounding box but the document is running in
> "static" mode (i.e., extra information about the document to allow
> scripting and Java interaction hasn't been held around).
>
> If you are using a JSVGComponent to display your SVG, call
>
> myJSVGComponent.setDocumentState(JSVGComponent.ALWAYS_DYNAMIC);
>
> before loading your SVG document into it.
>
> Cameron
>
> --
> Cameron McCormack
> | Web: http://mcc.id.au/
> | ICQ: 26955922
>
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>
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Re: bounding box exception
Posted by Cameron McCormack <ca...@aka.mcc.id.au>.
Hi Maik.
Maik Schrer proveo GmbH:
> after getBBox() from a SVGOMGElement and calling bbox.getWidth() e.g. I get
> following exception:
> java.lang.NullPointerException
> at org.apache.batik.dom.svg.SVGLocatableSupport$1.getX(Unknown Source)
> but the bbox itself isn't null
> what means 'Unknown Source' ?
As Tonny said, "Unknown Source" means that you don't have debugging
information compiled in. But as to the actual problem: it sounds like
you are trying to get the bounding box but the document is running in
"static" mode (i.e., extra information about the document to allow
scripting and Java interaction hasn't been held around).
If you are using a JSVGComponent to display your SVG, call
myJSVGComponent.setDocumentState(JSVGComponent.ALWAYS_DYNAMIC);
before loading your SVG document into it.
Cameron
--
Cameron McCormack
| Web: http://mcc.id.au/
| ICQ: 26955922
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Re: bounding box exception
Posted by Tonny Kohar <to...@kiyut.com>.
Hi,
> java.lang.NullPointerException
> at org.apache.batik.dom.svg.SVGLocatableSupport$1.getX(Unknown Source)
> but the bbox itself isn't null
> what means 'Unknown Source' ?
If I am not wrong, I think "unknown source" mean you compile batik
without debuging info enabled, so it doesn't know the line number where
the NullPointerException occur.
Regards
Tonny Kohar
--
Sketsa
SVG Graphics Editor
http://www.kiyut.com
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