RactiveJS: catch on-click event on checkboxes

I try to get the click on a checkbox using RactiveJS, as follows:

HTML:

<input type='checkbox' on-change-input-click="toggle">

JS:

toggle : function(){
    treatment()
}

The toggle function never gets called.

Why would I like to catch the toggle event? Because once the checkbox toggled, other components must be changed. More precisely, this is a checkbox in a tree. Toggling a checkbox in a tree node toggles the descendants nodes.

Maybe there is another event than change, input or click I missed...

The complete code is in this fiddle.