Rect::Expand

inline Rect<T>& Expand(T l, T t, T r, T b);
inline Rect<T>& Expand(T val);
inline Rect<T>& Expand(T h, T v);

Description

Expand expands each side of the local rectangle by a set value. The following expression is used to determine the result:

   (x1, y1, x2, y2) = (x1 - [l, m.x1, h.Begin, val, h], y1 - [t, m.y1, v.Begin, val, v], x2 + [r, m.x2, h.End, val, h], y2 + [b, m.y2, v.End, val, v])

Parameters

Parameters	Description
T l	A value that is subtracted from x1.
T t	A value that is subtracted from y1.
T r	A value that is added to x2.
T b	A value that is added to y2.
T val	A value that is subtracted from x1 and y1 and added to x2 and y2.
T h	Either a value that is subtracted from x1 or added to x2, or a range margin whose beginning and end are subtracted from and added to x1 and x2 respectively.
T v	Either a value that is subtracted from y1 or added to y2, or a range margin whose beginning and end are subtracted from and added to y1 and y2 respectively.

Return Value

A Rect reference to the local variable whose components are determined by expanding the original components by set values.