JohnHancock

Saving signatures has never been easier!

Installation

Add this line to your application's Gemfile:

gem 'john_hancock'

And then execute:

$ bundle

Or install it yourself as:

$ gem install john_hancock

Usage

With the gem installed, simply include it in the relevant JS manifest

//= require john_hancock

Then you are free to use it in the view

<%= form_for @user do |f| %>
  <%= f.signature_field :signature %>
  <%= f.submit %>
<% end %>

Once this is saved, you can output the string as an image.

<%= image_tag @user.signature %>

The signature_field method generates a canvas as well as a hidden field. If you would like more flexibility in the placement of these elements you can use them separately.

<%= form_for @user do |f| %>
  <%= f.signature_canvas %>
  <p>some text about the form</p>
  <%= f.hidden_signature_field :signature %>
  <%= f.submit %>
<% end %>

Example

Credit

This gem is maintained by Brandon Lawrence and Ben Miller.

The underlying JS library, Signature Pad, is written by Thomas J Bradley.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/Brantron/john_hancock.

License

The gem is available as open source under the terms of the MIT License.