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From Andres Toussaint <and...@onemileup.com>
Subject Re: dynamic change of display rendering
Date Thu, 03 Feb 2005 16:38:54 GMT
Hi,

If you know with certainty the order of the definitions, you may use 
the following suggestion:

Instead of putting the diplay in <def> elements, put them in <svg> 
elements. By doing this, you have a unique placeholder for each in the 
GVT (a CanvasGraphicsNode is created for each embedded SVG element). So 
you may walk the GVT tree to create the CanvasGraphicNode´s array with 
the geometry of each display.

Andres.


On Feb 3, 2005, at 11:27 AM, Rémy Brousset wrote:

>  
> hi folks,
>  
> i have some simple svg that i use with their gvt root node to display 
> it in existing java canvas.
>  
> ....
> GVTBuilder builder = new GVTBuilder();
> Element svgRootElem = svgDoc.getDocumentElement();
>  GraphicsNode rootNode = builder.build(ctx,svgRootElem );
> ...
>  rootNode.paint( myDisplayContext );
>  
> this works pretty good.
> What i want to do now is changing the display dynamically among 3 or 4 
> possible definitions stored in the svg.
> I tried tu put a defs section in the svg,
>  
> <svg width="10%" xmlns:xlink="http://www.w3.org/1999/xlink" 
> height="10%" viewBox="0 0 600 600" preserveAspectRatio="xMidYMid 
> meet"     xmlns="http://www.w3.org/2000/svg">
>    
>  <!-- default display -->
>     <ellipse rx="299" ry="299" style="stroke: rgb(255, 255, 255); 
> fill: rgb(255, 153, 0);" cx="300"
>          cy="300"/>
>     <path style="stroke: rgb(255, 255, 255); fill:rgb(255, 255, 255)" 
> d="m300,300 l 212.1,-212.1
>         a300 300 0 0 1 0 424.2 z"/>
>     <path style="stroke: rgb(255, 255, 255); fill:rgb(255, 255, 255)" 
> d="m300,300 l -212.1,-212.1
>         a300 300 0 0 0 0 424.2 z"/>
>         
>
>        <defs>
>              <g id="display2" >
>        
>                 <ellipse rx="299" ry="299" style="stroke: rgb(255, 
> 255, 255); fill: rgb(100, 150, 100);" cx="300"
>                   cy="300"/>
>                 <path style="stroke: rgb(255, 255, 255); fill:rgb(255,

> 255, 255)" d="m300,300 l 212.1,-212.1
>                  a300 300 0 0 1 0 424.2 z"/>
>                  <path style="stroke: rgb(255, 255, 255); 
> fill:rgb(255, 255, 255)" d="m300,300 l -212.1,-212.1
>                  a300 300 0 0 0 0 424.2 z"/>
>  
>              </g>  
>         </defs>
> </svg>
>  
>  
>  
> and i tried to access it that way with no results :
>  
>      Element elem = svgDoc.getElementById("display2");
>      GraphicsNode auxDisplayNode = ctx.getGraphicsNode(elem);  <-- 
> auxDisplayNode == null
>  
> Has someone ever done it? should i put it in a symbol section instead 
> of defs?
> have i to reconstruct a whole gvt tree (to have a root graphics 
> node)?if i have, how can i do that?
>  
> every ideas welcome (even stupids, trust me i got a lot...;)
>  
> thanks,regards
> Remy.
>  
>  
>
> <imstp_emo_fr.gif>
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