Re: Enhydra: Dynamic graphics in your page

[Ben Cottrill <cottrill@xxxxxxxxxx>]

Laurent,
    I am doing something similar in my application.  It involves displaying a
large stack of images in a jpeg format.  (30 -40 images @ 40 KB each)

This is done in a few steps.

1.  Create a temporary folder that is accessible via apache based on the name 
of
the session (24 characters of giberish )
2.  Convert the images from raw data to jpegs named img0, img1, img2 ...
3.  Have a PO that calls an applet to view these images.  (I use an applet
because it is necessary to be able to adjust contrast on my images... to 
locate
the images, i just change a parameter in the PO that calls the applet.)
4.  The applet then downloads the 40 or so jpegs via http from
myserver.com/output/<sessionname>/imgN.jpg into a vector.
5.  Then the applet is used to flip through the images
6.  I haven't done this part yet, but: On stop() or destroy() the applet calls
its loader with the event being "done", at which point the po calls some code 
to
remove that temporary file with the 40 jpegs in it.

    The biggest problem with the design (i think) is the temporary folder.  If
the applet fails to send over that it is done, i end up with a bunch of files
cluttering up my server.  This means possibly using some sort of timer to 
delete
them.

I am also interested in hearing any ideas on how else one might create and
display dynamic images in Enhydra.

Regards,
Ben



"Laurent Roméo" wrote:

> Hi,
>
> I would like to do one thing, but before diving inside all the APIs, I would
> like to test if anybody has already experienced it...
>
> My problem is to generate a dynamic graphic from a template one. That could 
> be
> the case if you want to display chart or every kind of statistics.
>
> I want to integrate it in my page using a tag like :
>
> <img src="http://www.mydomain.com/app/Dynamicgraphics.po>
>
> Doing so, it could be possible to integrate this graphics inside my page 
> where
> I put every kind of comments.
>
> My idea is to use an API like Java2D ( maybe another one is better), and to
> return a MIME TPYE appropriated.
>
> Any examples ?
>
> --
>
>   Cordialement,
>
> Laurent ROMEO
> -------------
>
> Directeur R&D
> AGISphere S.A.
>
> http://www.agisphere.com/
>
> laurent.romeo@xxxxxxxxxxxxx
>
> 01.47.45.99.92
> 06.88.08.49.50
>
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