pie chart in Java script

[selani]

can anyone tell me how to generate a pie chart on the fly in client side using javascript?

or where will i likely find materials on this....

thanx in advance.

 

[EdwardMartinIII]

It's easy.

First, you write a function that builds a pie chart on the fly onto a "2D array" (not technically possible in JavaScript, but there's a workaround in the examples at faq216-3516). Then you call a graphics plotting routine using that array (not technically possible in JavaScript, but there's a workaround in the examples at faq216-3516).

Your pie chart function will probably have a call like this:

PieChart(element1, element2, element3, etc.);

where each element is an array:
[value][RGBColor][label]

The function adds all the incoming values together and then uses the total and sub-values to produce angles of the appropriate value, plotting them onto the 2D array graph.

One of the examples in faq216-3516 is building a circle mathematically, so some of the calculations are already laid out for you there.

Cheers,


Edward

"Cut a hole in the door. Hang a flap. Criminy, why didn't I think of this earlier?!" -- inventor of the cat door