User Guide

Object 551
addProperty (Object.addProperty method)
public addProperty(name:String, getter:Function, setter:Function) : Boolean
Creates a getter/setter property. When Flash reads a getter/setter property, it invokes the get
function, and the function's return value becomes the value of
name. When Flash writes a
getter/setter property, it invokes the
set function and passes it the new value as a parameter. If
a property with the given name already exists, the new property overwrites it.
A "get" function is a function with no parameters. Its return value can be of any type. Its type
can change between invocations. The return value is treated as the current value of the
property.
A "set" function is a function that takes one parameter, which is the new value of the property.
For example, if property
x is assigned by the statement x = 1, the set function is passed the
parameter
1 of type number. The return value of the set function is ignored.
You can add getter/setter properties to prototype objects. If you add a getter/setter property to
a prototype object, all object instances that inherit the prototype object inherit the getter/
setter property. This makes it possible to add a getter/setter property in one location, the
prototype object, and have it propagate to all instances of a class (similar to adding methods to
prototype objects). If a get/set function is invoked for a getter/setter property in an inherited
prototype object, the reference passed to the get/set function is the originally referenced
object--not the prototype object.
isPrototypeOf(theClass:Object) :
Boolean
Indicates whether an instance of the
Object class is in the prototype
chain of the object specified as an
argument.
static registerClass(name:String,
theClass:Function) : Boolean
Associates a movie clip symbol with
an ActionScript object class.
toString() : String Converts the specified object to a
string and returns it.
unwatch(name:String) : Boolean Removes a watchpoint that
Object.watch() created.
valueOf() : Object Returns the primitive value of the
specified object.
watch(name:String,
callback:Function,
[userData:Object]) : Boolean
Registers an event handler to be
invoked when a specified property
of an ActionScript object changes.
Modifiers Signature Description