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From "Steiner, Dominik" <Dominik.Stei...@gigatronik.com>
Subject AW: getBBox
Date Mon, 22 Aug 2005 13:38:59 GMT






Von: Tracey Zellmann [mailto:tracey.zellmann@comcast.net] 
Gesendet: Montag, 22. August 2005 15:34
An: batik-users@xmlgraphics.apache.org
Betreff: Re: getBBox


Thanks for getting back to me. It makes sense that the canvas should be
ALWAYS_DYNAMIC. I don't have any defs and the canvas has been rendered
before I get to this place in the application. I am trying to resolve
how to actually give the canvas that property. I get the canvas by
loading a file:


String path = Context.getInstance().getSetUp("ImagePath");
        File f = new File(path);
        try {
        } catch (MalformedURLException e) {


I am continuig to scour the API, but haven't found the way to tell the
canvas to be dynamic. Any help with that?


----- Original Message ----- 

	From: Steiner, Dominik <mailto:Dominik.Steiner@gigatronik.com>  

	To: batik-users@xmlgraphics.apache.org 

	Sent: Monday, August 22, 2005 9:13 AM

	Subject: AW: getBBox


	Hi Tracey,


	I had similar problems with getBBox() and found out that 

	there are 3  things to notice when you want to get a BBox:


	1) your JSVGCanvas should be ALWAYS_DYNAMIC, because only then
the SVGContext gets added to the elements when they are rendered.

	2) The BBox gets available after the gvt tree is rendered, so
you can check this with adding a GVTTreeBuilderListener() to your

	3) Elements in the <defs> section (or with display:none) have no
geometry associated with them and hence have no bounding box.


	I hope this helps,





	Von: Tracey Zellmann [mailto:tracey.zellmann@comcast.net] 
	Gesendet: Montag, 22. August 2005 15:02
	An: batik-users@xmlgraphics.apache.org
	Betreff: getBBox


	I am having some trouble getting the bounding box for an


	I have an application where I show users the image of an
automobile - based on a Visio 2003 drawing saved as an svg document. The
display is working fine. They mark various points on the car as they
answer questions. I do not need to modify the svg document in real time.
I currently am capturing the positions they mark on a glass pane and
drawing them there. When the user finishes the session, I capture all
those points and write them out to an xml file. Later I will process all
the information from various users and produce an overall report. At
that time, I will put various graphical chart elements on the car image.


	To do this, I need to make sure the points I am capturing are
translated into the coordinate system of the car image. There are
various other Swing components displayed as well as the JSVGCanvas. I
have tried to use canvas.getLocation() as a base point, but that doesn't
seem to agree with the image of the car. I have read the recent posts
about image size and I have tried to get the bounding box of the car
image element. 


	The car image as exported by Visio is pasted below.


	I try the following code, but it returns a null bounding box


	  SVGOMGElement elt = 
	        SVGRect rect = elt.getBBox();

	I would try to get the properties of rect with getX(), getY(),
getHeight() and getWidth(), and use them to translate the screen points
to the car coordinates. However, when I try, rect is null. I have tried
quite a few alternatives, but I am stumped. Any help would be



	<g id="shape31-66" v:mID="31" v:groupContext="shape"
transform="translate(250.749,0) scale(-1,1)">

	<title>Vehicle Body.22</title>

	<v:textBlock v:margins="rect(4,4,4,4)"/>

	<path d="M41.7 3.84 L37.47 3.99 L33.24 4.45 L29.21 5.36 L25.56
6.43 L21.9 7.8 L18.45 9.47 L15.18 11.45 L12.3 13.58

	L9.61 16.02 L7.11 18.45 L5 21.19 L3.27 24.08 L1.92 27.13 L0.77
30.32 L0.19 33.67 L0 37.02 L0 334.73

	L0.19 338.08 L0.77 341.43 L1.92 344.63 L3.27 347.67 L5 350.56
L7.11 353.3 L9.61 355.89 L12.3 358.17

	L15.18 360.3 L18.45 362.28 L21.9 363.95 L25.56 365.32 L29.21
366.39 L33.24 367.3 L37.47 367.76 L41.7

	367.91 L208.86 367.91 L213.09 367.76 L217.32 367.3 L221.35
366.39 L225.19 365.32 L228.84 363.95 L232.3

	362.28 L235.57 360.3 L238.45 358.17 L241.14 355.89 L243.64 353.3
L245.75 350.56 L247.48 347.67 L248.83

	344.63 L249.98 341.43 L250.56 338.08 L250.75 334.73 L250.75
37.02 L250.56 33.67 L249.98 30.32 L248.83

	27.13 L247.48 24.08 L245.75 21.19 L243.64 18.45 L241.14 16.02
L238.45 13.58 L235.57 11.45 L232.3 9.47

	L228.84 7.8 L225.19 6.43 L221.35 5.36 L217.32 4.45 L213.09 3.99
L208.86 3.84 L41.7 3.84 Z" class="st7"/>



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