Spacer
is a blank, non-interactive item that has a minimum size you
can set. The minimum width is useful for allocating flexible amounts of space
between Item
s within the same row of a Form
. The minimum height
is useful for enforcing a particular minimum height of a row. The application
can set the minimum width or height to any non-negative value. The implementation
may enforce implementation-defined maximum values for the minimum width and
height.