Re: charting utilities?

Eric,

I'd be happy to contribute Pixory's Image component to the Tapestry 
community. I hate to keep harping on this subject, but tapestry.Image is a 
weak spot in the otherwise excellent design of Tapestry. The problem is that 
it's coupled to the Asset system, but the approach can and should be more 
generic.

The more general approach is the one that WebObjects takes. The Image 
component simply renders images, regardless of the *source* of that Image. I 
have mimiced this approach in the Pixory image component. At the end of the 
day, all you need to render an image is a Stream to provide the bytes (and 
optionally the mime/type and maybe width/height). This decouples the Image 
rendering from the Image provider, so you can easily plug in whatever 
charting library you like.

I'll mail a copy of the Pixory Image stuff to anyone who wants a copy. Also, 
if the community would like this contributed to the contrib package, just 
let me know how to proceed.

regards,

Joseph Panico
[email protected]




>From: "Schneider, Eric" <[email protected]>
>To: [email protected]
>Subject: [Tapestry-developer] charting utilities?
>Date: Tue, 21 Jan 2003 14:59:55 -0500
>
>Hi,
>
>I was wondering if anyone has a good suggestion for a Java Charting package
>that works well with tapestry.
>
>I've come across a package called JChart (http://jcharts.sourceforge.net)
>which seems to be straightforward.  The only thing concerning is how well 
>it
>will mix with tapestry.  All of the examples are servlets that use this
>encoder class which basically sets the content type on the http response 
>and
>encodes a BufferedImage.  The response is nothing except the chart.  I'd
>actually need the chart to be rendered within a tapestry page, along with
>other html.
>
>Anyone have any suggestions on how to approach this?
>
>Thanks in advance,
>Eric
>
>
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