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From kpu <olivier.capuo...@gmail.com>
Subject Re: SVGGraphics2D how to group elements
Date Mon, 05 Apr 2010 20:54:42 GMT

Hi Thomas,


thomas.deweese wrote:
> 
> Hi Olivier,
> 
>> 
>> m1.draw(svgGenerator);
>> svgGenerator.getRoot(elt1_g);
>> 
>> m2.draw(svgGenerator);
>> svgGenerator.getRoot(elt2_g);
>> 
>> 
>> Result is : 
>> <svg><defs id="genericDefs"/><g/></svg>
> 
>    I assume that is from calling 'svgGenerator.stream'?
>    That is why I said:
> 
>> thomas.deweese wrote:
>> > 
>> > 
>> >>       // Finally, stream out SVG to the standard output using
>> >>       // UTF-8 encoding.
>> > 
>> > You will need to manage the streaming of the SVG yourself.
>> > There are many options for this but two from Batik are
>> > batik.svggen.XmlWriter or I think a little better is
>> > bati.dom.DOMUtilities.
> 
>     When you call 'getRoot' the content is removed from the
> SVGGraphics2D and put in the g element you give it.  It is
> then your responsibility to append that group to a document
> however you want and stream it out.  This gives you complete 
> control over the structure of your document.
> 
>     Good luck.
> 
> 

I understand better, so I try :
      
m1.draw(svgGenerator);
svgGenerator.getRoot(elt1_g);
         
m2.draw(svgGenerator);      
svgGenerator.getRoot(elt2_g);
            
Node node = documentGrouped.importNode(elt1_g, true);      
documentGrouped.getDocumentElement().appendChild(node);
      
node = documentGrouped.importNode(elt2_g, true);
documentGrouped.getDocumentElement().appendChild(node);
     
Element svgRoot = documentGrouped.getDocumentElement();
      
svgRoot.setAttributeNS(SVGSyntax.XMLNS_NAMESPACE_URI,
            SVGSyntax.XMLNS_PREFIX,
            SVGSyntax.SVG_NAMESPACE_URI);
      
svgRoot.setAttributeNS(SVGSyntax.XMLNS_NAMESPACE_URI,
            SVGSyntax.XMLNS_PREFIX + ":" + SVGSyntax.XLINK_PREFIX,
            SVGSyntax.SVG_NAMESPACE_URI);
      
System.out.println(DOMUtilities.getXML(documentGrouped.getFirstChild()));

output :

<svg xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/2000/svg">
<g fill-opacity="1" color-rendering="auto" color-interpolation="auto"
text-rendering="auto" stroke="black" stroke-linecap="square"
stroke-miterlimit="10" shape-rendering="auto" stroke-opacity="1"
fill="black" stroke-dasharray="none" font-weight="normal" stroke-width="1"
font-family="&apos;Dialog&apos;" font-style="normal" stroke-linejoin="miter"
font-size="12" image-rendering="auto" stroke-dashoffset="0">
<!--Generated by the Batik Graphics2D SVG Generator-->
<defs id="genericDefs"/>
  <g>
    <g fill="blue" stroke="blue">
      <circle r="25" cx="25" cy="25" stroke="none"/>
    </g>
  </g>
</g>
<g fill-opacity="1" color-rendering="auto" color-interpolation="auto"
text-rendering="auto" stroke="black" stroke-linecap="square"
stroke-miterlimit="10" shape-rendering="auto" stroke-opacity="1"
fill="black" stroke-dasharray="none" font-weight="normal" stroke-width="1"
font-family="&apos;Dialog&apos;" font-style="normal" stroke-linejoin="miter"
font-size="12" image-rendering="auto" stroke-dashoffset="0">
<!--Generated by the Batik Graphics2D SVG Generator-->
<defs id="genericDefs"/>
  <g>
    <g fill="lime" stroke="lime">
      <rect x="0" width="50" y="50" height="50" stroke="none"/>
    </g>
  </g>
</g>
</svg>

Aside from the multiple statements (same id values, comments...) it's Ok !

Thanks !


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