Checkbox property control

With this approach you can have a checkbox that can trigger javascript and python scripts:

The calculated value click action toggles a Boolean document property. When this Boolean doc property changes it triggers the iron python script.

The javascript is triggered by adding a click event handler


Explanation

1. Calculated value has a custom expression to show a checkbox character marked when document property is on or off:
   
     If(${booleanDocProp},"☒","☐")
   
   
2. Calculated value has a script associated to run a python script when clicked. The script changes the state of the document property:
   
   Document.Properties['booleanDocProp'] = not Document.Properties['booleanDocProp']
   
   
3. Another python script changes the visualization title when document property changes:
   
   //viz is a Visualization type script parameter
   viz.Title = "Checkbox is ON" if Document.Properties['booleanDocProp'] else "Checkbox is OFF"
   
4. Optionally trigger a javascript when the calculated value changes.
   
   cb=document.getElementById('boxyCheckbox')
   cb.addEventListener('click',function(){
     status = cb.innerText=="☒"?"OFF":"ON"
     alert("Checkbox is " + status) })