TPRect

Rect structure

#include <Quickdraw.h>

typedef struct Rect { Size Offset Description

short top; 2 0 Top edge of rectangle

short left; 2 2 Left edge

short bottom; 2 4 Bottom edge

short right; 2 6 Rightmost edge

} Rect ; 8

#define topLeft( r) (((Point *) &(r))[0]) handy macros

#define botRight( r) (((Point *) &(r))[1])

typedef Rect *RectPtr;

Notes: The Rect structure defines a rectangular area of a window. Use SetRect to

initialize a rectangle; or simply set its fields directly (to avoid the system

overhead).

A valid rectangle should enclose some pixels; thus if top >= bottom or

left >= right, then the system will generally treat is as an " empty

rectangle" - one whose coordinates are (0,0)-(0,0) (see EmptyRect).

Mathematical Operations

Drawing Operations

Other Fns Using a Rect parameter

Note: Always pass the address of a Rect to functions. All examples in

this Guide use: FooFn( &r,... ) to make this clear, and function

prototypes correctly refer to the parameter as a Rect *. Of course,

Apple documentation (with its Pascal bias) assumes you will mentally

convert "Rect" to "&Rect".