drawing images or charts with javascript

[jx2]

I cant find any information about drawing bitmaps with javascript.

At the moment my website creates charts using PHP I want to get rid of it from the server and do it on client side (transfer / computer power).

Anyone know something about it or could you point out a good source to start with?

[gits]

good evening ... it's late here and i hope i don't give you a bad recommendation ;) ... but i faced that problem once and looked for something that does the job you want ... there are some libraries out there ... google for them ... i remember plotkit for instance:

http://www.liquidx.net/plotkit/

or simple google 'charts with javascript' for example

http://www.developertutorials.com/scripts/7/134/

a lot of them seems to do very well ... but i think you should choose the one you like ... the time i needed to use that, i only needed bargraphs ... that is relativly easy to do by yourself ... so i wrote my own barchart-script ... it did only simple vertical or horizontal barcharts ... and was not able to do some things that you need for a real cool lib ... like simple (generic) creation, simple passing of data ... ideally in native js-array/object notation ... all together: you may find a lot of scripts out there that will help you ... and some produce real slick output :) ... if you prefer to 'selfcode', it would be possible too ...

but remember ... javascript doesn't have the ability to produce bitmaps ... all 'javascript-graphics' are limited to the creation of dom-elements (divs, lines, spans together with styles etc.) ... that gives you the advantage of creating interactive charts (attach event-handlers to a bar - a div with width and height) ... but no bitmap ... thats not possible ... i think ;)

[jx2]

thanks a lot
that was very helpful - thats a pity its not suported by not that old IE 6 :)

[tomaszwor]

Try flot based on JQuery

It makes nice charts and it's customizable.

http://code.google.com/p/flot/

http://itprolife.worona.eu/2009/08/scatter-chart-library-moving-to-flot.html