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

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Figure 6-9. Hierarchical tree structure of the airplane ences the root node of the airplane. The whole composite plane structure plane is then added to the display object container linked to the Main class (line 18). Because the Main class is the document class of the Flash document, the airplane is added to the stage, which is the root node of the display list. Example 6-25. Main.as Main wing engine Main wing engine airplane fuselage Tail wing Tail wing 1 package 2 { 3 import flash.display.Sprite; 4 5 /** 6 * Main Class 7 * @ purpose: Document class for movie 8 */ 9 public class Main extends Sprite 10 { 11 private var airPlane:Composite; 12 13 public function Main( ) 14 { 15 // create airplane 16 airPlane = new Composite(0.0); 17 airPlane.x = 250; airPlane.y = 100; 18 addChild(airPlane); 19 20 // add fuselage 21 var fuselage:Composite = new Fuselage(1000, 0) 22 airPlane.addChild(fuselage); 23 24 // add main wing on the left (port side) 25 var rightWing:Composite = new MainWing(200, 0); 26 rightWing.x = 20; rightWing.y = 50; 27 fuselage.addChild(rightWing); 28 29 // add main wing on the right (starbord side) 30 var leftWing:Composite = new MainWing(200, 0); Using Flash’s Built-in Composite Structure: the Display List | 239
Example 6-25. Main.as (continued) 31 leftWing.scaleX = -1; // flip on vertical axis 32 leftWing.x = -20; leftWing.y = 50; 33 fuselage.addChild(leftWing); 34 35 // add engine to right wing 36 var rightEngine:Component = new Engine(300, 0); 37 rightEngine.x = 50; rightEngine.y = -20; 38 rightWing.addChild(rightEngine); 39 40 // add engine to left wing 41 var lefttEngine:Component = new Engine(300, 0); 42 lefttEngine.x = 50; lefttEngine.y = -20; 43 leftWing.addChild(lefttEngine); 44 45 // add tail wing on the right 46 var leftTailWing:Component = new TailWing(50, 0); 47 leftTailWing.scaleX = -1; // flip on vertical axis 48 leftTailWing.x = -20; leftTailWing.y = 150; 49 fuselage.addChild(leftTailWing); 50 51 // add tail wing on the left 52 var rightTailWing:Component = new TailWing(50, 0); 53 rightTailWing.x = 20; rightTailWing.y = 150; 54 fuselage.addChild(rightTailWing); 55 56 trace('Weight of airplane: ' + airPlane.getWeight( )); 57 //total weight 58 } 59 } 60 } Calculating the Total Weight of the Airplane Line 56 of the Main class shown in Example 6-25 calls the getWeight( ) method on the root node of the airplane. The following output is the result of this statement. Weight of airplane: 2100 The getWeight( ) method calculates the weight iteratively by adding the weights of all components in the airplane structure. This is a very powerful way of keeping track of an overall parameter in a complexcomposite structure. If this airplane were used in a game, the weight is essential to craft realistic movement dynamics using motion physics. The weight of the plane can change dynamically. For example, the plane could be carrying passengers, bombs, and a fuel tank. Adding passengers will increase weight; dropping bombs will reduce weight, and flight will progressively reduce weight by using up fuel. The getWeight( ) method will work exactly the same way if we extend the airplane to add and remove other components such as passengers, fuel, etc. 240 | Chapter 6: Composite Pattern
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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:
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Video Player Concrete State Applica
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Who This Book Is For We wanted to d
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What You Need to Use This Book You
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and OOP. (Working out how to conver
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Safari® Enabled When you see a Saf
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Editors Our development editor, Rob
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Design patterns provide object-orie
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that program. Like pulling a string
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Built-in State Machines: while most
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Figure 1-2. Rocket drawing Center p
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Example 1-1. TestRocket.as package
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skills that would provide the concr
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Example 1-3. PlayVideoAbstract.as (
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Hiding Your Data from Bad Consequen
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Example 1-7. Encap.as (continued) }
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Wait! There’s more! Later in this
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As you can see in Example 1-9, the
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Using Encapsulation and Design Patt
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Example 1-13. QuadPets.as (continue
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Using Interfaces and Abstract Class
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interface. You’ll need an MP3 fil
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Example 1-22. Subclass.as package {
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Example 1-25. ImplementSubChange.as
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Example 1-29. Country.as (continued
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Example 1-32. IBiz.as package { pub
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Example 1-35 has further difference
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In addition to messages in the Outp
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state here is a bit more contextual
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your client dependency leads to une
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Example 1-40. VidPlayer.as (continu
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Doing Composition To understand com
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The clearest way we’ve seen compo
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Example 1-47. Mp3.as (continued) }
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Example 1-54. TestMedia.as (continu
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and ActionScript 3.0. However, the
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Figure 1-10 shows some possible fut
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introduction to OOP, you will find
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Creational Patterns Conceal creatio
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or dependency between the Client an
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The primary responsibility of the f
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The example package contains the Pr
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Example 2-5. CreatorA.as (continued
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instantiate concrete products var p
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Example 2-8. IPrintjob.as package p
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Clients Note that the client doesn
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Extended Example: Color Printing Th
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Example 2-19. NewLowVolPrintCenter.
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Key OOP Concepts Used in the Factor
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to implement default behavior commo
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Example 2-26. ShapeCreator.as packa
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draw filled shapes filledShapeCreat
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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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Page 212 and 213: Example 5-11. CarAdapter.as (contin
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Page 218 and 219: Example 5-14. ListDisplayField.as 3
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Page 224 and 225: Summary The adapter pattern allows
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Page 234 and 235: Executing the following statements
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Page 240 and 241: Example 6-9. Playlist.as (continued
Page 242 and 243: Example 6-10. Song.as 58 soundChann
Page 244 and 245: Using Inverse Kinematics Inverse ki
Page 246 and 247: Example 6-12. Composite.as package
Page 248 and 249: Example 6-14. Main.as 23 addChild(s
Page 250 and 251: The following steps relate to Figur
Page 252 and 253: Example 6-16. Tail.as package { imp
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Page 256 and 257: Example 6-18 shows the IPlane inter
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Page 262 and 263: Modifying Components to Reflect Dam
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Page 267 and 268: Behavioral Patterns Class Communica
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Page 281 and 282: Example 7-14. TextButton.as package
Page 283 and 284: Example 7-15. InvokerPanel.as (cont
Page 285 and 286: Extended Example: Sharing Command O
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Page 289 and 290: Example 7-21. IncrementCommandWithU
Page 291 and 292: Example 7-24. Client code for undoa
Page 293 and 294: Example 7-26. TextDisplayField.as (
Page 295 and 296: Example 7-28. Radio.as 44 var url =
Page 297 and 298: Example 7-30. Client code for the p
Page 299 and 300: Example 7-31. DynamicControlButtons
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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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