Callback on mouse action in menu

Hello my idea is the following one

Right now the only function we could call is "update" but it could be cool to be able to send other callback at different steps.

-> I would really like having some callbacks on specific action in menu (specially enum) :

• Click on enum
• Going hover
• Click on choice
• middle mouse scoll
• Going out of the enum

this could work with other kind of menu properties.