[Seaside] Trends and Graphics
popov at shaw.ca
Sat May 27 20:06:55 UTC 2006
Mike Hales wrote:
> I am going to be starting a small seaside project soon to provide a
> limited web interface for our existing VW and Gemstone application. One
> thing that I want to do is provide basic trend functionality. On google
> trends I see that they generate a png file on the fly for their trends.
> I don't need trends that continuously update so generating some sort of
> image would work fine. I know squeak has some libraries to do this sort
> of thing but does anyone have suggestions for good starting point in
> VisualWorks? For our GUI based app we have custom views to handle all
> of the trending. Is there any code out there that could take a
> GrapicsContext and drop it to a jpg for example that could be served up
> through seaside? Thanks for any pointers.
I'd first generate your graph using graphics context on a pixmap, which
can then be converted to a native image via #asImage, which you could
then save as png/jpg/gif. As far as writers for these formats go, we
wrote a quick and dirty interface to FreeImage which does all the
reading/writing of many image formats for us, I'll have to see on Monday
if I can throw it in the public, its really not rocket science there.
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