Catching the "Remove" click event for fields and filters

Hi everybody,

I am working on this for hours now, and I haven't found what I was looking for.

I am developing a new filter that extends "views_handler_filter()". I am able to "catch" the event when the user clicks the "Apply" button, when he wants to create a new filter for his view (I use value_submit() for that). However, "value_submit()" is not trigged/used when the user clicks the Remove button.

First question: Is that normal?

Second question: if it is normal, what is the way to catch this event? I need to modify something internally when the user remove the filter, and so I have to catch this event.

Thanks for your help!

Take care,

Fred