Simple calculator for text fileds
#Installation and usage
Install it as bower package
bower install textfield_calculator or include js and css file to your project.
To run this wedjit add role attribute with name calculator-source-field to your input tag and role attribute with name open-calculator to your button to open calc. That is
.col-sm-6
.form-group
.input-group
= f.text_field :sum, class: 'form-control text-right', role: 'calculator-source-field'
.input-group-addon.pad-none
= link_to image_tag('calc.png'), nil, role: 'open-calculator', class: 'addon-image', title: 'Calculator'