User Guide

1030 ActionScript classes

Rectangle (flash.geom.Rectangle)

Object

+-flash.geom.Rectangle

public class Rectangle

extends Object

The Rectangle class is used to create and modify Rectangle objects. A Rectangle object is an

area defined by its position, as indicated by its top-left corner point (x, y), and by its width

and its height. Be careful when you design these areas—if a rectangle is described as having its

upper-left corner at 0,0 and has a height of 10 and a width of 20, the lower-right corner is at

9,19, because the count of width and height began at 0,0.

The

x, y, width, and height properties of the Rectangle class are independent of each other;

changing the value of one property has no effect on the others. However, the

right and

bottom properties are integrally related to those four—if you change right, you are changing

width; if you change bottom, you are changing height, and so on. And you must have the

left or x property established before you set width or right property.

Rectangle objects are used to support the BitmapData class filters. They are also used in the

MovieClip.scrollRect property to support the ability to crop and scroll a MovieClip

instance with specific width, height and scrolling offsets.

Availability: ActionScript 1.0; Flash Player 8