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TeeChart Javascript charting, module for Node.js and jQuery plugin.
Steema Software
Charting module using TeeChart for JavaScript.
Free for non-commercial use. See license.txt.
For TeeChart Javascript demos, documentation, support:
Node.js Dependencies:
To create and render a chart picture at server-side,
an HTML5 <canvas> node library is required.
TeeChart has been tested on Linux using node.js and
node-canvas module.
-Install node.js:
-Install node-canvas module:
npm install teechart
Running included example:
# node main.js
This small javascript code will accept requests via web to
return an image/png sample chart:
The important bits of code are:
1) Using TeeChart and node-canvas modules:
var tee=require('./lib/teechart.js'),
2) Creating a Tee.Chart, passing the canvas:
var canvas = new Canvas(500,300),
chart = new tee.Tee.Chart(canvas);
3) Manually specifying chart size (this step should not
be mandatory in future releases) :
4) Add chart series, data, change formatting, etc, and DRAW:
chart.title.text="Node.js and TeeChart";
chart.addSeries(new tee.Tee.Bar([5,3,7,1,2]));
5) Return the chart as image, or save it to a file, etc
(Check node-canvas documentation for more options)
res.writeHead(200, {'Content-Type': 'text/html'});
res.end("<html><body><img src='"+canvas.toDataURL()+"'/></body></html>");