Grid shows 500px width in Vaadin 8

Vaadin 6 / 7 / 8
1

I am trying to have a grid take up the full width of a defined-size Window.
If I leave the grid with size undefined, it displays a width of exactly 500px. Where does this magic number come from?
(Setting a width of 100% displays an actual width of 0)

Thanks,
Reuben

2

Setting a width of 100% displays an actual width of 0

What you mean by that? Width of 0px would mean that Grid does not show at all? Or do you mean that getWidth() returns 0, but not the actual width?

3

does not display at all.