December 2002
Intermediate to advanced
1088 pages
192h 4m
English
Content preview from ActionScript for Flash MX: The Definitive Guide, Second Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.
282
|
Chapter 12: Objects and Classes
Object Classes
Are you ready to get your hands dirty? Let’s create a custom Ball class. The first step
in class creation is designing the properties and methods the class supports. Our Ball
class will have the following properties:
radius Half the diameter of a ball
color A ball’s color
xPosition A ball’s horizontal location
yPosition A ball’s vertical location
Our Ball class will have the following methods:
moveClipTo( ) Used to reposition a ball
getArea( ) Used to determine the amount of space an individual ball occupies
In natural language, our Ball class would be described to the interpreter as follows:
A Ball is a type of object. All ball objects have the properties radius, color, xPosition,
yPosition, which are set individually for each ball. All ball objects also share the
methods moveClipTo( ) and getArea( ), which are identical across all members of the
Ball class.
Instances of our Ball class will have no on-screen presence; for now, they will simply
represent balls conceptually in our program. Later in this chapter, under “Displaying
the Ball on Screen,” we’ll consider how to actually render the ball to screen. Then, in
Chapter 14, we’ll show how to implement our Ball class as a type of movie clip. Stay
tuned!
Making a Class
There is no specific ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.