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Grcode ↑

Grcode is a plain simple wrapper for generating Qrcode images using Google API

code.google.com/intl/es-ES/apis/chart/infographics/docs/qr_codes.html

Installation ↑

Like other ruby gems, add it to your Gemfile or run

> gem install 'grcode'

How to use it ↑

A piece of code worth 1000 words :)

>> require 'grcode'
=> true
>> qr = Grcode::QRCode.new('Hello world of ruby lovers!')
=> #<Grcode::QRCode:0x100522af0 @url="https://chart.googleapis.com/chart?cht=qr&chl=Hello world of ruby lovers!&chs=150x150">
>> qr.url
=> "https://chart.googleapis.com/chart?cht=qr&chl=Hello world of ruby lovers!&chs=150x150"

Options ↑

Along with the string to encode, you can pass some other options that Google API supports:

  • Size

  • Encoding

  • Correction

  • Margin

Check out the options here: code.google.com/intl/es-ES/apis/chart/infographics/docs/qr_codes.html

Some more examples with the options:

Size ↑

>> qr = Grcode::QRCode.new('Hello world of ruby lovers!', {:size => 300})
=> #<Grcode::QRCode:0x100520138 @url="https://chart.googleapis.com/chart?cht=qr&chl=Hello world of ruby lovers!&chs=300x300">
>> qr.url
=> "https://chart.googleapis.com/chart?cht=qr&chl=Hello world of ruby lovers!&chs=300x300"

Margin ↑

>> qr = Grcode::QRCode.new('Hello world of ruby lovers!', {:size => 300, :margin => 5})
=> #<Grcode::QRCode:0x100513bb8 @url="https://chart.googleapis.com/chart?cht=qr&chld=L|5&chl=Hello world of ruby lovers!&chs=300x300">
>> qr.url
=> "https://chart.googleapis.com/chart?cht=qr&chld=L|5&chl=Hello world of ruby lovers!&chs=300x300"