Legacy Document

Inside Macintosh: Imaging With QuickDraw /

Chapter 3 - QuickDraw Drawing / QuickDraw Drawing Reference

Routines / Creating and Managing Rectangles

EmptyRect

To determine whether a rectangle is an empty rectangle, use the EmptyRect function.

FUNCTION EmptyRect (r: Rect): Boolean;

r

The rectangle to examine.

DESCRIPTION

The EmptyRect function returns TRUE if the rectangle that you specify in the r parameter is an empty rectangle, FALSE if it is not. A rectangle is considered empty if the bottom coordinate is less than or equal to the top coordinate or if the right coordinate is less than or equal to the left.