height of the rectangle thus change by 2*dx and 2*dy, respectively.) If
one or both of @a dx and @a dy are negative, the opposite happens: the
rectangle size decreases in the respective direction.
height of the rectangle thus change by 2*dx and 2*dy, respectively.) If
one or both of @a dx and @a dy are negative, the opposite happens: the
rectangle size decreases in the respective direction.