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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | == rQRCode, Encode QRCodes
rQRCode is a library for encoding QR Codes in Ruby. It has a simple interface with all the standard qrcode options. It was adapted from the Javascript library by Kazuhiko Arase.
== An Overview
Let's clear up some rQRCode stuff.
# rQRCode is a *standalone library*. It requires no other libraries. Just Ruby!
# It is an encoding library. You can't decode QR codes with it.
# The interface is simple and assumes you just want to encode a string into a QR code
# QR code is trademarked by Denso Wave inc
== Resources
wikipedia:: http://en.wikipedia.org/wiki/QR_Code
Denso-Wave website:: http://www.denso-wave.com/qrcode/index-e.html
kaywa:: http://qrcode.kaywa.com
== Installing
You may get the latest stable version from Rubyforge.
$ gem install rqrcode
You can also get the source from http://github.com/whomwah/rqrcode/tree/master
$ git clone git://github.com/whomwah/rqrcode.git
=== Loading rQRCode Itself
You have installed the gem already, yeah?
require 'rubygems'
require 'rqrcode'
=== Simple QRCode generation to screen
qr = RQRCode::QRCode.new( 'my string to generate', :size => 4, :level => :h )
puts qr.to_s
#
# Prints:
# xxxxxxx x x x x x xx xxxxxxx
# x x xxx xxxxxx xxx x x
# x xxx x xxxxx x xx x xxx x
# ... etc
=== Simple QRCode generation to view (RubyOnRails)
<b>Controller:</b>
@qr = RQRCode::QRCode.new( 'my string to generate', :size => 4, :level => :h )
<b>View: (minimal styling added)</b>
<style type="text/css">
table {
border-width: 0;
border-style: none;
border-color: #0000ff;
border-collapse: collapse;
}
td {
border-width: 0;
border-style: none;
border-color: #0000ff;
border-collapse: collapse;
padding: 0;
margin: 0;
width: 10px;
height: 10px;
}
td.black { background-color: #000; }
td.white { background-color: #fff; }
</style>
<table>
<% @qr.modules.each_index do |x| %>
<tr>
<% @qr.modules.each_index do |y| %>
<% if @qr.is_dark(x,y) %>
<td class="black"/>
<% else %>
<td class="white"/>
<% end %>
<% end %>
</tr>
<% end %>
</table>
== Contact
Author:: Duncan Robertson
Email:: duncan@whomwah.com
Home Page:: http://whomwah.com
License:: MIT Licence (http://www.opensource.org/licenses/mit-license.html)
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