Hello Seriy,

It's the restriction of the current implementation of the 'checkbox' formatter. It uses just the standard checkbox which is disabled. It one clicked on any disabled control no click event will be fired.

STOP!

During writing the answer I become an idea how to modify the standard 'checkbox' formatter to make the disabled checkbox do clickable. I implemented the solution with respect of the custom formatter and unformatter. The idea is to place invisible div over the disabled checkbox. In the case if the user click on the disabled checkbox