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Supplemental material

I recommend that you also study the other lessons in my extensive collection of online programming tutorials. You will find a consolidated index at www.DickBaldwin.com .

General background information

The ActionScript 3.0 Reference for the Adobe Flash Platform is a voluminous document. Understanding ActionScript events on the basisof that document alone can be a daunting task.

There are two entry points into the documentation that can make it somewhat easier to navigate:

The flash.events.Event class

As I understand it, all possible ActionScript events are represented by subclasses of the flash.events.Event class. That class has approximately eighty subclasses, many of which are further extended into additional subclasses.

The flash.events.MouseEvent class

For example, the flash.events.MouseEvent class has eight subclasses, some of which are extended into other subclasses.Therefore, the total number of subclasses of the Event class may be well in excess of one hundred. This means that there may be more than onehundred different types of events being dispatched during the running of an ActionScript program.

Event types and subtypes

An ActionScript class represents a type . Therefore, each subclass of the Event class defines a different type of event. Many subclasses define a large number of subtypes.

For example, the MouseEvent class defines about seventeen subtypes ranging in alphabetical order from CLICK to ROLL_OVER , including MOUSE_MOVE , MOUSE_DOWN , MOUSE_UP , etc.

(For brevity, I will refer to the subtypes as types for the remainder of this document.)

Hundreds of event types and hundreds of object types

Therefore, there are many hundreds of different types of events that can bedispatched in various combinations by hundreds of different types of objects during the running of an ActionScript program.

The DisplayObject class

Objects of some classes (such as Button ) , which are subclasses of the DisplayObject class, can dispatch events as a result of direct user interaction. Forexample, a user can click on a button and cause a click event to be dispatched.

The URLLoader class

Objects of other classes (such as URLLoader ) , which are not subclasses of the DisplayObject class, cannot be caused to dispatch an event as a result of direct userinteraction. (As far as I know, there is no way for a user to interact directly with an object of the URLLoader class.)

However, an object of the URLLoader class can dispatch nine different types of events ranging in alphabetical order from activate to securityError .

The addEventListener methods

The documentation index for Flex Builder 3 lists eight different versions of the addEventListener method in classes plus one that is declared in an interface. Of theeight versions defined in classes, one is defined in the EventDispatcher class. That is the one that I will concentrate on in this lesson.

For the record, however, four of the eight versions are overridden versions of the method that is defined in the EventDispatcher class. The remaining three of the eight are defined in classes that extend the Proxy class, which I will ignore in this lesson.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
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Source:  OpenStax, Object-oriented programming (oop) with actionscript. OpenStax CNX. Jun 04, 2010 Download for free at http://cnx.org/content/col11202/1.19
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