[En-Nut-Discussion] Web Charts? Use java?

[Tim Tait]

Edwin-

Thanks for the quick reply.

Edwin van den Oetelaar wrote:

> Things that come to my mind ...
>
> 1) Use flash (in client) let Ethernut serve XML data.  (works for sure)

I'm not a fan of flash, nor have I experience any with developing using 
it. But the include flash on the httpd sample does not work in my 
FireFox browser. How would flash compare in size?

> 2) Use javascript in client to make nice graphic from XML (works for 
> sure) think AJAX ..

Interesting.

> 3) Let Ethernut generate page with data in JavaScript arrrays, let the 
> client make nice graphics from this data. (no xml parse on client)

Sounds easy:) I found some nice shareware that does this using VML 
<http://www.structura.info/XYGraph/XYGraphDemo.htm>, but it only seems 
to only work under IE not Firefox:( Plus it's a bit big... I guess Java 
byte code has an edge there.

> 4) Let Ethernut generate PNG or GIF file from data and serve that to 
> client (needs lots of work/memory on ethernut)

I think client-side graphic generation is the way to go.

> 5) yes use java to build the graphic, but depends on VM on client 
> which is less common then flash on client

Still sounds like the best option to me... Don't most people have a java 
VM installed? Just need that java applet code:)

>
> Good luck,
> Edwin van den Oetelaar
>
Thanks again-

Tim

> Tim Tait wrote:
>
>>
>> Has anbody done anything with serving dynamic data charts from 
>> ethernut? I want to to display simple line graph of sensor readings 
>> over time. I am thinking that a java applet is the way to go. Most of 
>> the applets out there seem to big, one "tChart" seems reasonable at 
>> 17kb, put you have to pay to get source. Is there another way?
>>
>> Thanks-
>>
>> Tim
>>