I have a Viewport where I´ve added a ContentPanel. On top of the panel I´ve added a menuBar. So now, I want display some widgets (which extend LayoutContainer) in the contentPanel, but I want all of them to use all the window available (that's why I´m using viewport). Probably I´m missing something here or the container chosen isnt the right one, because this isnt working as I thought. Could anyone help ?