User Guide

Using Rectangle objects 421
Similarly, as the following example shows, if you change the bottom or right property of a
Rectangle object, the position of its top-left corner does not change, so it is resized
accordingly:
import flash.geom.Rectangle;
var x1:Number = 0;
var y1:Number = 0;
var width1:Number = 100;
var height1:Number = 50;
var rect1:Rectangle = new Rectangle(x1, y1, width1, height1);
trace(rect1) // (x=0, y=0, w=100, h=50)
rect1.right = 60;
trect1.bottom = 20;
trace(rect1); // (x=0, y=0, w=60, h=20)
You can also reposition a Rectangle object by using the offset() method, as follows:
import flash.geom.Rectangle;
var x1:Number = 0;
var y1:Number = 0;
var width1:Number = 100;
var height1:Number = 50;
var rect1:Rectangle = new Rectangle(x1, y1, width1, height1);
trace(rect1) // (x=0, y=0, w=100, h=50)
rect1.offset(20, 30);
trace(rect1); // (x=20, y=30, w=100, h=50)
The offsetPt() method works similarly, except that it takes a Point object as its parameter,
rather than x and y offset values.
You can also resize a Rectangle object by using the
inflate() method, which includes two
parameters,
dx and dy. The dx parameter represents the number of pixels that the left and
right sides of the rectangle will move from the center, and the
dy parameter represents the
number of pixels that the top and bottom of the rectangle will move from the center:
import flash.geom.Rectangle;
var x1:Number = 0;
var y1:Number = 0;
var width1:Number = 100;
var height1:Number = 50;
var rect1:Rectangle = new Rectangle(x1, y1, width1, height1);
trace(rect1) // (x=0, y=0, w=100, h=50)
rect1.inflate(6,4);
trace(rect1); // (x=-6, y=-4, w=112, h=58)
The inflatePt() method works similarly, except that it takes a Point object as its parameter,
rather than
dx and dy values.