Function opaque 

pub fn opaque<W>(content: W) -> Opaque<W>

Wraps the given widget and captures any mouse button presses inside the bounds of the widget—effectively making it opaque.

This helper is meant to be used to mark elements in a Stack, or inside an overlay—like the popup of a Popover—to avoid mouse events from passing through to the elements below.

Use Opaque::capture_scroll to also capture scroll wheel events.