Hello, fantastic library!

I'm trying to implement an autocomplete popup, but I've not been able to find a way to create a popup that can received mouse input and not block input from flowing through the underlying windows.

To be more specific of the context in which I'm trying to use it. I'd like to create an autocomplete popup a la google search. In which the popup does not close when you click elsewhere, you can hover and click it's items, and the input box ( or other widget ) retains keyboard input throughout.

Example:

Is it possible to do currently with the public API?

Thank you.