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Learn how to translate a largely Flex MXML program into a largely ActionScript program.  Learn that events can be subdivided into two major categories: those that involve direct user interaction and those that don't.  Learn how to use the events documentation to find what you need to write event-driven ActionScript programs.
Click Effects03 to run this ActionScript program. (Click the "Back" button in your browser to return to this page.)

Table of contents

Preface

General

ActionScript 3: Note that all references to ActionScript in this lesson are references to version 3 or later.

This tutorial lesson is part of a continuing series of lessons dedicated to object-oriented programming (OOP) with ActionScript.

Several ways to create and launch ActionScript programs

There are several ways to create and launch programs written in the ActionScript programming language. Many of the lessons in this series willuse Adobe Flex as the launch pad for the sample ActionScript programs.

An earlier lesson titled The Default Application Container provided information on how to get started programming with Adobe's Flex Builder 3. (See Baldwin's Flex programming website .) You should study that lesson before embarking on the lessons in this series.

Some understanding of Flex MXML will be required

I also recommend that you study all of the lessons on Baldwin's Flex programming website in parallel with your study of these ActionScript lessons. Eventually you will probably need to understand both ActionScript and Flex andthe relationships that exist between them in order to become a successful ActionScript programmer.

Will emphasize ActionScript code

It is often possible to use either ActionScript code or Flex MXML code to achieve the same result. Insofar as this series of lessons is concerned,the emphasis will be on ActionScript code even in those cases where Flex MXML code maybe a suitable alternative.

Viewing tip

I recommend that you open another copy of this document in a separate browser window and use the following links to easily find and view the figuresand listings while you are reading about them.

Figures

  • Figure 1 . Program ActivateEvent01 screen graphics.
  • Figure 2 . Debug output in the system console.
  • Figure 3 . Project file structure for Effects03.
  • Figure 4 . Screen display at startup.
  • Figure 5 . Screen display after clicking Start and Pause.
  • Figure 6 . Screen display after the effect has run to completion.
  • Figure 7 . Comparable MXML code.

Listings

  • Listing 1 . Common code for the MXML file.
  • Listing 2 . Beginning of Driver class for ActivateEvent01.
  • Listing 3 . The event handler methods.
  • Listing 4 . Beginning of Driver class for Effects03.
  • Listing 5 . Beginning of the constructor for Effects03.
  • Listing 6 . Prepare the TextArea object and add it to the Panel.
  • Listing 7 . Prepare an embedded image and add it to the Panel.
  • Listing 8 . Add the button bar to the panel.
  • Listing 9 . Prepare the six buttons for use.
  • Listing 10 . Configure the Resize object.
  • Listing 11 . Event handlers registered on the Resize object.
  • Listing 12 . Common event handler for the buttons.
  • Listing 13 . Event handler for the creationComplete event dispatched by the Panel.
  • Listing 14 . The common MXML code.
  • Listing 15 . Driver class for ActivateEvent01.
  • Listing 16 . Driver class for Effects03.

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir 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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