Quiche

Easy to use Node.js wrapper for Google Image Charts - Chart Tools (deprecated by Google) that also supports Image-Charts, a drop-in replacement for Google Image Charts.

Examples

Pie chart

 var Quiche = require('quiche');

 var pie = new Quiche('pie');
 pie.setTransparentBackground(); // Make background transparent
 pie.addData(3000, 'Foo', 'FF0000');
 pie.addData(2900, 'Bas', '0000FF');
 pie.addData(1500, 'Bar', '00FF00');
 pie.setLabel(['Foo','Bas','Bar']); // Add labels to pie segments
 var imageUrl = pie.getUrl(true); // First param controls http vs. https

Bar chart

 var Quiche = require('quiche');

 var bar = new Quiche('bar');
 bar.setWidth(400);
 bar.setHeight(265);
 bar.setTitle('Some title or something');
 bar.setBarStacked(); // Stacked chart
 bar.setBarWidth(0);
 bar.setBarSpacing(6); // 6 pixles between bars/groups
 bar.setLegendBottom(); // Put legend at bottom
 bar.setTransparentBackground(); // Make background transparent

 bar.addData([19, 19, 21, 14, 19, 11, 10, 18, 19, 30], 'Foo', 'FF0000');
 bar.addData([4, 3, 2, 3, 0, 0, 3, 4, 2, 2], 'bar', '0000FF');
 bar.addData([10, 8, 2, 1, 18, 9, 20, 21, 19, 11], 'bin', '008000');
 bar.addData([2, 1, 1, 1, 1, 7, 3, 6, 2, 7], 'bash', '00FF00');
 bar.addData([1, 0, 0, 1, 2, 1, 0, 0, 0, 0], 'blah', '307000');

 bar.setAutoScaling(); // Auto scale y axis
 bar.addAxisLabels('x', ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10']);

 var imageUrl = bar.getUrl(true); // First param controls http vs. https

Line chart

 var quiche = require('quiche');

 var chart = quiche('line');
 chart.setTitle('Something with lines');
 chart.addData([3000, 2900, 1500], 'Blah', '008000');
 chart.addData([1000, 1500, 2000], 'Asdf', '0000FF');
 chart.addAxisLabels('x', ['1800', '1900', '2000']);
 chart.setAutoScaling();
 chart.setAxisRange('y', 500, 3500, 250);
 chart.setTransparentBackground();

 var imageUrl = chart.getUrl(true); // First param controls http vs. https

QR Code

 var quiche = require('quiche');

 var qr = quiche('qr');
 qr.setLabel('https://github.com/ryanrolds/quiche');
 qr.setWidth(100);
 qr.setHeight(100);

 var url = qr.getUrl(true); // First param controls http vs. https

Note: currently not supported by Image-Charts

Documentation

Install

 $ npm install quiche

API

Supported charts

• line
• pie
• bar
• qr

All charts

• chart.setWidth(width [number]);
• chart.setHeight(height [number]);
• chart.setTitle(title [string]);
• chart.setTitleColor(color [hex color]);
• chart.setTitleSize(size [number]);
• chart.setTitleRight();
• chart.setTitleLeft();
• chart.setLegendOrder(order [string])
• chart.setLegendLeft();
• chart.setLegendRight();
• chart.setLegendBottom();
• chart.setLegendTop();
• chart.setLegendVertical();
• chart.setLegendHorizontal();
• chart.setLegendHidden();
• chart.setLegendSize([number]);
• chart.setTransparentBackground();
• chart.addAxisLabels(axis [x | y | r], labels [array]);
• chart.addData(data [number | array], label [string], color [hex color]);
• chart.setAutoScaling();
• chart.setHostname(hostname [string]);
  • e.g. 'chart.googleapis.com' to use the deprecated Google Image Charts API (default is 'image-charts.com')
• chart.getUrl(https [boolean]); // true = https, false = http
• chart.getReq(https [boolean], callback [function]);
• chart.getPostReq(https [boolean], callback [function]);

Pie

• pie.set3D();
• pie.setLabel();
• pie.addPercent();

Bar

• bar.addData();
• bar.setBarWidth([number]);
• bar.setBarSpacing([number]);
• bar.setBarVertical();
• bar.setBarHorizontal();
• bar.setBarGrouped();
• bar.setBarStacked();
• bar.setBarOverlapped();
• bar.setAxisRange(axis ["x", "r", "y"], start [number], end [number], step [number]);

Line

• line.addData(data [number | array], label [string], color [hex color], thickness [number], line length [number], space length [number]);
• line.setSparklines();
• line.setXY();
• line.setAxisRange(axis ["x", "r", "y"], start [number], end [number], step [number]);

QR Code

• qr.setLabel(data [string]);
• qr.setEncoding(encoding [UTF-8 | Shift_JS | ISO-8859-1]);
• qr.setErrorCorrectionLevel(level [string]) // https://developers.google.com/chart/infographics/docs/qr_codes
• qr.setMargin(margin [number]); // Margin around graphic
• qr.setWidth(width [number]);
• qr.setHeight(height [number]);
• qr.getUrl(https [boolean]); // true = https, false = http

Features

• Pie charts
• Bar charts
• Auto scaling

TODO

• Documentation
• More chart types
• Better confict handling