TeeChart Javascript charting, module for Node.js and jQuery plugin.
Steema Software https://www.steema.com
Charting module using TeeChart for JavaScript. Free for non-commercial use. See license.txt.
For TeeChart Javascript demos, documentation, support:
https://www.steema.com/product/html5
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.
Installation
-
Install node.js: https://nodejs.org
-
Install node-canvas module: https://github.com/LearnBoost/node-canvas
Or:
npm install teechartRunning included example
node main.jsThis small javascript code will accept requests via web to return an image/png sample chart:
Notes
The important bits of code are:
- Using TeeChart and node-canvas modules:
var tee = require('./lib/teechart.js'),
Canvas = require('./node-canvas/lib/canvas.js');- Creating a
Tee.Chart, passing the canvas:
var canvas = new Canvas(500,300),
chart = new tee.Tee.Chart(canvas);- Manually specifying chart size (this step should not be mandatory in future releases) :
chart.bounds.set(0,0,500,300);- 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]));
chart.draw();- 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>");