Some days ago I was developing a library to show and run mathematics exercises on the web, and I needed a simple calculator widget.

A search in the mootools forge led to 0 results, so I decided to write my own plugin, also because I needed only some basics operations (sum, difference, multiplication, division, percentage, pow and sqrt).

The result is the Calculator plugin, now available on the mootools forge.

demo

Such plugin let's you create a calculator instance in a specified container or over the document, and make it draggable. Methods are provided in order the hide/show it or destroy it.

The implementation was very very "fast" so the code can be and probably will be enhanced in the next future.