1. I have 1, 2 or three checkboxes and textfield. Textfield should be enabled/editable if there is selected let's say 1 checkbox, and locked/not editable when is selected one of other checkboxes. Is it possible to do? If yes, how to do it?
2. I have some collection of checkboxes, and I want to limit possible selections to 2. How to do it?
Is there any possibility to add on_change event handler to checkboxes?