EdgePane, in the bajaui palette, is a container with a layout like the java.awt.BorderLayout. It only supports five potential children in the frozen slots top, bottom, left, right, and center. The top and bottom widgets fill the pane horizontally use their preferred height. The left and right widgets use their preferred width and occupy the vertical space between the top and bottom. The center widget gets all the remaining space. Any of the widgets may be a NullWidget.