ActionScript 3.0 Design Patterns.pdf - VideoTutorials-bg.com

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implementation. (In Example 1-20 you can see how an interface structure is programmed to the interface instead of an implementation.) Example 1-36. DoBusiness.as package { import flash.display.Sprite; } public class DoBusiness extends Sprite { public function DoBusiness( ) { //TV var tv:Plasma=new Plasma( ); trace(tv.productDescribe( )); trace(tv.productPrice(855)); tv.productDisplay("plasma.flv"); tv.x=160; tv.y=110; addChild(tv); } } //MP3 var mp3:MP3Player=new MP3Player( ); trace(mp3.productDescribe( )); trace(mp3.productPrice(245)); mp3.productDisplay("bongo.mp3"); //Computers var computers:Computers=new Computers( ); trace(computers.productDescribe( )); trace(computers.productPrice(1200)); computers.productDisplay("whizbang.gif"); addChild(computers); You will need an FLV file, an MP3 file, and a GIF file for this application. Name the FLV file plasma.flv, the MP3 file bongo.mp3, and the GIF file whizbang.gif. The contents are unimportant but the names and file types are important. Open a new Flash document, save it in the same folder with the rest of the application, and type in DoBusiness in the Document class window. When you test it, the Output window shows the following: 42 inch TV with Plasma screen $855 MP3Player with 1 Terabyte of Memory $245 New 10 gHz processor, 30 gigabyte RAM, includes 32 inch flat screen monitor $1200 Polymorphism | 41
In addition to messages in the Output window, you should see something like Figure 1-6 on the stage. Figure 1-6. Graphic file and video appear on the stage In addition to the visible graphics, you should also hear the sound played by the MP3 file. (This multimedia experience has been brought to you by polymorphism and the letter P.) Principles of Design Pattern Development The founding principles of design patterns are laid down in the Gang of Four’s (GoF) canon, Design Patterns: Elements of Reusable Object-Oriented Software. The two essential principles are: • Program to an interface, not an implementation • Favor object composition over class inheritance If you skipped the section on the four basic OOP principles because you already know them, the first principle of Design Pattern OOP was introduced, but only briefly. Not to worry, we’ll go over it in detail. Before going further, we need to clarify some basic terms. While these terms are fairly simple, they can trip you up if you don’t understand how they’re used in 42 | Chapter 1: Object-Oriented Programming, Design Patterns, and ActionScript 3.0
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ActionScript 3.0 Design Patterns
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ActionScript 3.0 Design Patterns Wi
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Bill would like to dedicate this to
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Example: Sprite Factory 84 Example:
Page 11 and 12: Video Player Concrete State Applica
Page 13 and 14: Who This Book Is For We wanted to d
Page 15 and 16: What You Need to Use This Book You
Page 17 and 18: and OOP. (Working out how to conver
Page 19 and 20: Safari® Enabled When you see a Saf
Page 21 and 22: Editors Our development editor, Rob
Page 23 and 24: Design patterns provide object-orie
Page 25 and 26: that program. Like pulling a string
Page 27 and 28: Built-in State Machines: while most
Page 29 and 30: Figure 1-2. Rocket drawing Center p
Page 31 and 32: Example 1-1. TestRocket.as package
Page 33 and 34: skills that would provide the concr
Page 35 and 36: Example 1-3. PlayVideoAbstract.as (
Page 37 and 38: Hiding Your Data from Bad Consequen
Page 39 and 40: Example 1-7. Encap.as (continued) }
Page 41 and 42: Wait! There’s more! Later in this
Page 43 and 44: As you can see in Example 1-9, the
Page 45 and 46: Using Encapsulation and Design Patt
Page 47 and 48: Example 1-13. QuadPets.as (continue
Page 49 and 50: Using Interfaces and Abstract Class
Page 51 and 52: interface. You’ll need an MP3 fil
Page 53 and 54: Example 1-22. Subclass.as package {
Page 55 and 56: Example 1-25. ImplementSubChange.as
Page 57 and 58: Example 1-29. Country.as (continued
Page 59 and 60: Example 1-32. IBiz.as package { pub
Page 61: Example 1-35 has further difference
Page 65 and 66: state here is a bit more contextual
Page 67 and 68: your client dependency leads to une
Page 69 and 70: Example 1-40. VidPlayer.as (continu
Page 71 and 72: Doing Composition To understand com
Page 73 and 74: The clearest way we’ve seen compo
Page 75 and 76: Example 1-47. Mp3.as (continued) }
Page 77 and 78: Example 1-54. TestMedia.as (continu
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Page 81 and 82: Figure 1-10 shows some possible fut
Page 83 and 84: introduction to OOP, you will find
Page 85 and 86: Creational Patterns Conceal creatio
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Page 89 and 90: The primary responsibility of the f
Page 91 and 92: The example package contains the Pr
Page 93 and 94: Example 2-5. CreatorA.as (continued
Page 95 and 96: instantiate concrete products var p
Page 97 and 98: Example 2-8. IPrintjob.as package p
Page 99 and 100: Clients Note that the client doesn
Page 101 and 102: Extended Example: Color Printing Th
Page 103 and 104: Example 2-19. NewLowVolPrintCenter.
Page 105 and 106: Key OOP Concepts Used in the Factor
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Page 109 and 110: Example 2-26. ShapeCreator.as packa
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checking if the projectile has gone
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Example 2-32. AlienMine.as (continu
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Example 2-34. AlienShip.as } } } }
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Example 2-36. Weapon.as (continued)
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Concrete Creator Classes Until we e
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in teamwork, the Singleton can be u
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To create a class, we need a public
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Example 3-4. Singleton.as package {
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Figure 3-3. Compiler not finding cl
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However, does that mean that only a
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Figure 3-5. Two instance labels and
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Example 3-10. Alert.as } } { Alert.
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However, had we done that, we would
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for playing the selected tune. If i
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MP3 file in the same folder, and re
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shipping costs. It constitutes a go
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open the Convert to Symbol dialog b
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PART III III.Structural Patterns Tr
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Chapter 4 CHAPTER 4 Decorator Patte
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like abstract classes, simply by no
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simple inheritance. Depending on ho
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Minimalist Abstract Decorator To ge
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eral months. Using a Decorator desi
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Example 4-5. DecConB.as package { /
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Applying a Simple Decorator Pattern
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If you want to create more concrete
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Example 4-15. Muff.as package { pub
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Figure 4-6. Paper doll with two dif
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Adding Properties and Methods Up to
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Decorating with Multiple Properties
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} override public function evil( ):
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Example 4-25. Compassion.as package
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Deadly sins Example 4-29. Rage.as p
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Example 4-33. Dogmatisms.as package
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class window in the Dual.fla Proper
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Example 4-37. Soul.as (continued) }
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Imagine that you are responsible fo
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Example 4-41. Accord.as (continued)
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Example 4-45. GPS.as package { publ
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Example 4-48. Deal.as 16 internal v
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Example 4-48. Deal.as 120 { 121 tra
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Figure 4-8. Decorator user interfac
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Chapter 5 CHAPTER 5 Adapter Pattern
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and their functionality to figure o
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Example 5-4. Main.as (continued) }
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Example 5-5. Adaptee.as package { p
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methods and properties to accomplis
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Example 5-9. LegacyCar.as 47 } 48 4
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ignition key of the car (assume tha
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Example 5-11. CarAdapter.as (contin
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Note that the new interface turns t
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var listField = new TextField( ); l
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Example 5-14. ListDisplayField.as 3
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Example 5-15. Main.as (document cla
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Example 5-17. Main.as (document cla
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Summary The adapter pattern allows
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objects and composite objects the s
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the components. We can think of tou
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method by tracing sName. When opera
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oot composite 1 leaf 1 leaf 2 compo
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Executing the following statements
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Example 6-6. The safeRemove( ) meth
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leaf 2 Composite 1 leaf 2 leaf 3 Di
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Example 6-9. Playlist.as (continued
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Example 6-10. Song.as 58 soundChann
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Using Inverse Kinematics Inverse ki
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Example 6-12. Composite.as package
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Example 6-14. Main.as 23 addChild(s
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The following steps relate to Figur
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Example 6-16. Tail.as package { imp
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Note how the snake is constructed u
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Example 6-18 shows the IPlane inter
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Unlike the Shape class, Sprite does
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Figure 6-9. Hierarchical tree struc
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Modifying Components to Reflect Dam
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private function showDamage(evt:Eve
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Behavioral Patterns Class Communica
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Notice the tight coupling between t
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Each envelope encapsulates a partic
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instance is passed to the construct
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Setting a Trigger to Invoke the Com
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Example 7-7. IMacroCommand.as packa
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Example 7-12. ConcreteMacroCommand.
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Example 7-14. TextButton.as package
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Example 7-15. InvokerPanel.as (cont
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Extended Example: Sharing Command O
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changes are seamlessly spread throu
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Example 7-21. IncrementCommandWithU
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Example 7-24. Client code for undoa
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Example 7-26. TextDisplayField.as (
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Example 7-28. Radio.as 44 var url =
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Example 7-30. Client code for the p
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Example 7-31. DynamicControlButtons
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adio, very much like someone progra
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Chapter CHAPTER 8 8 Observer Patter
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introduced, adding a class as part
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of an abstract class or an interfac
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works fine. What’s more, using th
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this all work right is the use of a
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Example 8-7. ConcreteSubject.as (co
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Example 8-9. TestSub.as (continued)
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} this.news=news; this.sports=sport
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Example 8-12. ConcreteSubject.as pa
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Example 8-13. ConcreteObserver.as (
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Whoaa!, the stock market is at 2987
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Example 8-17. ConcreteSubject.as pa
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Launching the Space Battle In Examp
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5. In the Symbol editing mode, drag
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Figure 8-5. Android shooting a beam
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Example 8-19. ChangeHandler.as (con
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To make the task more manageable an
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Example 8-24. ConcreteObserver.as p
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In this application, all you’re r
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Example 8-26. QuarterBar.as (contin
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Example 8-27. QuarterGraph.as (cont
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Example 8-28. DataDesign.as (contin
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Summary The real test for a design
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to inspect. So, you’re going to n
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method. The child classes just give
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Further, discussing favoring compos
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Figure 9-3. Hollywood principle Min
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tions in the main algorithm that yo
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Example 9-4. ShedMaker.as package {
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Both instances employ the templateM
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Not-So-Concrete Concrete Classes Th
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Example 9-11. PlayVideo.as (continu
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Example 9-13. PlayMedia .as (contin
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When to Hook? The hook’s useful w
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Example 9-15. FlightPlan.as (contin
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Open a new Flash document, and type
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One application where the state pat
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tive Simulation by Jonathan Kaye an
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For example, with a two-state machi
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Example 10-2. VideoWorks.as (contin
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To complete the state machine, we n
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Example 10-7. State.as package { //
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Example 10-10. VideoWorks.as (conti
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Example 10-13. TestVid.as package {
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Example 10-13. TestVid.as (continue
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Example 10-15. StopState.as (contin
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Example 10-17. PauseState.as 22 pub
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Example 10-19. TestPause.as (contin
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Figure 10-6 shows what your video p
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Figure 10-7. Statechart with five s
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Example 10-22. PlayState.as 1 packa
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Example 10-24. RecordState.as 1 pac
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Example 10-26. VideoWorks.as (conti
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Example 10-27. TestFMS.as (continue
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Chapter CHAPTER 11 11 Strategy Patt
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say that the Context class (aggrega
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etween the context classes and the
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Example 11-3. ConcreteStrategy.as p
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Adding More Concrete Strategies and
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Example 11-9. Tricks.as (continued)
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Even though we’ve discussed some
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Example 11-18. Bubbles.as package {
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Simply by adding setters to the con
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Contexts for String Strategies You
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Example 11-24. StringWork.as packag
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Example 11-29. SortAll.as package {
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Example 11-33. TestStringStrategy.a
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Using More Than One Pattern PART V
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Chapter 12 CHAPTER 12 Model-View-Co
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triggered by a user interacting wit
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grouped together in a tabbed panel
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Example 12-2. Model.as (continued)
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Example 12-5. View.as (continued) 1
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implementations in the MVC. Our vie
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Example 12-8. CompositeView.as (con
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Example 12-10. CharCodeLeafView.as
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Key OOP Concepts in the MVC Pattern
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Example 12-12. IModel.as (Model int
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Example 12-15. Controller.as (Contr
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Example 12-16. CBView.as 24 update(
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Note that only the combo boxview th
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Example 12-18. INewModel.as (contin
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Example 12-21. RBView.as package {
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add map type select radio button gr
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Example 12-23. CarModel.as (continu
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Example 12-25. RHController.as (con
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Example 12-28. Main.as (document cl
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Example 12-30. GPSView.as package {
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Example 12-32. ChaseController.as (
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Chapter 13 CHAPTER 13 Symmetric Pro
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• Indicate that a remote player h
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Even though both of the solutions a
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Referee 1 Player1 Proxy2 Internet S
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With a single template method, and
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developed with an eye to the order
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Boolean variables to false. (The fa
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Example 13-3. RPS.as (continued) }
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Example 13-4. proxygame.asc (contin
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Example 13-5. SymPlayer1.as package
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Example 13-5. SymPlayer1.as (contin
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Example 13-5. SymPlayer1.as (contin
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In addition to using the Referee to
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Example 13-6. DynamicText.as (conti
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3. Click the Text layer to select i
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A abstract classes, 28, 31, 68, 130
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increment and decrement commands, 2
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E ECOOP, 470 EmailCheck.as, 418 enc
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MapTypeController.as, 454 MapView.a
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Q QuadPets.as, 25 R Radio.as, 273 R
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T Tail.as, 231 Target.as, 180 Templ
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