Trigger custom JS events and handle them on the server side

What is the best way to do this with Tapestry 5.4? The jQuery bind mixin
seems to have done this for Tapestry 5.3 (
http://tapestry5-jquery.com/mixins/docsbind).

Basically, what I'm trying to achieve is, to allow palette components to
behave like the select components in this example:
http://jumpstart.doublenegative.com.au/jumpstart7/examples/ajax/selectdependency1

The selected values of the first, determine what can be selected in the
next one.

There do not seem to be any suitable events triggered when adding or
removing elements in a palette or am I missing something?

Any help is highly appreciated. Thanks in advance!