ActionScript for Flash MX: The Definitive Guide, Second Edition

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Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.

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Chapter 14: Movie Clip Subclasses and Components

Component Template

The following code presents a generic component template that implements a

MovieClip subclass. The template does not use a namespace, such as

org.moock,as

we did in our Ball example. Nor does the template store all constructor parameters

on a single

params object. These optional techniques can be implemented at your dis-

cretion. However, the template expects constructor parameters to be prefixed with

cp_, and it deletes all component parameters after construction. Though deleting

constructor parameters is not mandatory, it is wise coding practice.

// CODE PLACED ON FRAME 1 OF someClassSymbol IN THE LIBRARY.

#initclip

/*

* SomeClass Class. Extends MovieClip

* Version: 1.0.0

* Desc: Your description goes here

*

* Component Params:

* cp_param1 -Short description

* cp_param2 -Short description

*

* Methods:

* someMethod( ) -Short description

*/

/*

* Class Constructor

* (Parameters are passed by an initObj or set as component parameters)

*/

_global.SomeClass = function ( ) {

// Create Instance properties

this.prop1 = this.cp_param1;

// Initialize instance

this.someMethod(this.cp_param2);

// Remove component params (those with the cp_ prefix) from the instance

for (var p in this) {

if (p.indexOf("cp_") != -1) {

delete ...