clear_area/[5,6]
clear_area(+Window, +X, +Y, +Width, +Height) clear_area(+Window, +X, +Y, +Width, +Height, +Exposures)
Clear the region of Window defined by X, Y, Width, and Height. Exposures
is either true
or false
(default false
) indicating whether
exposure events should be generated. The cleared portion of the window
is filled with the window's background.