Hi. how can I enter a sub menu ?

Directory Vaadin App Layout
1

Hi. how can I enter a sub menu ?

2

Everyone is waiting for sub menu support :)

3

Hi. I’ve a little solution…now i’m very tired … is late.
Tomorrow i post you my idea for around the problem.
night

4

Hi, and thanks for the feedback! Do you have any strong preference about how a sub menu should be implemented? You can just point to examples in other UI libraries if you like.