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Re: getBBox() on a <use>

From: Dirk Schulze <vbs85@gmx.de>
Date: Wed, 20 Jan 2010 13:48:02 +0100
To: Jeff Schiller <codedread@gmail.com>
Cc: www-svg <www-svg@w3.org>
Message-ID: <1263991682.28275.9.camel@dirk-laptop>
Hi,

I don't know the correct behavior of getBbox, but it sound a bit
strange, that the bbox should be the bbox of the rect? The rect isn't
placed at 100,100 on applying the <use> coordinates, but why should it
still have the old coordinates of the rect position?
That would mean, that the bbox is not very helpful on a use element,
since it doesn't have any relation to the real position of it or it's
content?

Greetings,
Dirk

Am Dienstag, den 19.01.2010, 21:25 -0600 schrieb Jeff Schiller:
> Is the following test case correct:
> 
> <svg xmlns="http://www.w3.org/2000/svg"
> xmlns:xlink="http://www.w3.org/1999/xlink">
>   <rect id="r" x="100" y="100" width="200" height="100" fill="red" />
>   <use id="u" x="200" y="200" width="400" height="200" xlink:href="#r"/>
> 
>   <script><![CDATA[
>   	var u = document.getElementById("u"),
>   		r = document.getElementById("r"),
>   		b = u.getBBox();
>   	if (console && console.log) console.log([b.x,b.y,b.width,b.height]);
>   	if (b.x == 200 && b.y == 200 && b.width == 400 && b.height == 200) ) {
>   		r.setAttribute("fill", "green");
>   	}
>   ]]></script>
> </svg>
> 
> In other words, shouldn't the bbox of a <use> element be defined by
> its x,y,width,height just like a <rect> or an <image> ?  No browser
> gives consistent results:
> 
> Firefox  :  100, 100, 200, 100
> Opera   :  100, 100, 200, 100
> WebKit :   300, 300, 200, 100 (huh? clearly a bug!)
> 
> What's ASV do?
> What's IE9 do? :)
> 
> Thanks,
> Jeff
Received on Wednesday, 20 January 2010 12:48:37 GMT

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