Re: svg charting app [Sec=Unclassified]

 Hi Stephen,

 There are charting apps based on SVG that work directly in a 
 web-browser.

 Examples are:

 * highcharts: http://www.highcharts.com/ (commercial/opensource)
 * Google charts: http://code.google.com/intl/de-DE/apis/chart/ (some 
 Google license)
 * http://mbostock.github.com/d3/: not so simple but very powerful - 
 more than just charts. (BSD license)

 I believe that all of these are browser-based and I doubt they work 
 without modifications in Batik directly.

 Maybe the above links can help, even if they are more browser-oriented 
 and less java/Batik related.

 Andreas

 On Mon, 14 Nov 2011 16:28:37 +1100, Steve Cameron wrote:
> Hello,
>
> I have inherited a Java application that uses batik to create XY
> scatter charts. There are some things that
>
> I'd like to improve and I am thinking of swapping it over to make use
> of JFreeCharts, which provides what I want pretty easily.
>
> However, I am interested in SVG in general and am wondering if there
> are others who have implemented a chart library/tool based on batik?
>
> I'd like to add zooming capability, which of course SVG provides but
> for charts there is the need to maintain the x and y axes in view at
> the same time as you zoom in on the data. I'm sure this can be done 
> by
> applying separate transforms to the data region and separate x and y
> axis regions, but that functionality is already available in
> JFreeCharts.
>
> Another issue is displaying a large number of points dynamically (I
> swap the data set), is there a way to speed this up in dynamic SVG by
> preventing the screen from repainting until all old points have been
> removed and new ones added (or is this a foreign concept in SVG)?
>
> I suspect that most Java based 2d charts use the java.awt.Graphics2D
> class for the User Interface for performance reasons and render to 
> SVG
> using batik as an option. I'm wondering about the pro's and con's of
> this approach, versus doing it all in SVG?
>
> On advantage I can think of is that you could maintain a common set 
> of
> code for a web-based and a Java-based interactive charts library.
>
> I hope that someone can point me in the right direction.
>
> Thanks
>
> Stephen Cameron
>
> Antarctic Fisheries Computing and Database Support Provider
>
> Australian Antarctic Division
>
> Kingston, Tasmania
>
> Phone: 03 62323571
>
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