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

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Figure 8-3. Earthling spaceship 6. Repeat Steps 1 through 5 to create a movie clip named Alien. Make a different ship and point it in the opposite direction as the Earthling movie clip spaceship. Once you’re finished, you should see both the Alien and Earthling movie clips in the Library panel. Building the weapons Originally, we tried building the spaceship and weapon as a single movie clip, but after experimentation, it made more sense to make separate movie clips for better flexibility. The ones provided here are extremely simple, but you can add any kind of enhancement you want—blast trails, sound, and step-down to fire. The following steps show simple ones for seeing how the Observer design pattern state change can be triggered. 1. Select Insert ➝ New Symbol from the menu bar. Name the movie clip bullet, using all lowercase for the name. Select Movie clip as the Behavior, and click OK. You are now in the Symbol editing mode. 2. Draw something that you want to look like the projectile shooting at the Alien. We used a simple oval with a fin on the top for a shark-like missile with the dimensions, W=23, H=7.3. The height includes the fin; so it’s a pretty small missile, but proportionate to the Earthling ship. When you’re done, click Scene 1 to exit the Symbol editing mode. 3. Select Insert ➝ New Symbol from the menu bar When the New Symbol window opens, type in Missile in the Name window, and select Movie clip as the Behavior. If you see a button named Advanced, click it. It opens up part of the New Symbol window that you need for the next step. 4. Click on the Export for <strong>ActionScript</strong> checkbox in the Linkage group. You should see the Export in first frame checkbox automatically selected. Also, in the Class window, you should see Missile appear and flash.display.MovieClip in the Base class window. Click OK. Dynamically Changing States | 307
5. In the Symbol editing mode, drag a copy of the bullet movie clip to the center position (X=0, Y=0). 6. Click on Frame 20 and press the F5 key to add frames to Frame 20. Now, press F6 to add a keyframe. Select the keyframe in Frame 20, and move the bullet movie clip to X=380, Y=0. 7. Click on Frame 1, and in the Properties panel, select Motion in the Tween menu. You should see an arrow in the Timeline from Frame 1 to Frame 20 with a blue background. When you test it, the bullet MC should move from left to right. 8. Click on Frame 1, and open the Actions panel (Press F9 or Option + F9 on the Mac). Type in stop( ). 9. Repeat steps 1 through 8 for the Alien weapon. Make the Alien slug (bullet) look different and use the movie clip name projectile. Use the dimensions W=42, H=11. Instead of the weapon name Missile, use the name Torpedo. The Alien torpedo has to go in the opposite direction of the Earthling missile. So, from the initial position of X=0, Y=0 in the first frame, it should be in X=-423 for the last frame of the tween. Figure 8-4 shows a couple of simple magnified examples of the weapons. Figure 8-4. Earthling and Alien weapons Building the Android space station and beam The Android space station represents an automated space station that fires a double beam at both the Earthling and Alien ships. It’s nothing more than a pentagonshaped object. The v-shaped beam weapon sits on the pentagon movie clip. 1. Select Insert ➝ New Symbol from the menu bar. 2. When the New Symbol window opens, type in Android in the Name window, and select Movie clip as the Behavior. If you see a button named Advanced, click it. It opens up part of the New Symbol window that you need for the next step. 308 | Chapter 8: Observer Pattern Alien’s Torpedo Earthling’s Missle
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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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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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Page 281 and 282: Example 7-14. TextButton.as package
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Page 295 and 296: Example 7-28. Radio.as 44 var url =
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Page 313 and 314: Example 8-7. ConcreteSubject.as (co
Page 315 and 316: Example 8-9. TestSub.as (continued)
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Page 333 and 334: Example 8-19. ChangeHandler.as (con
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Page 341 and 342: Example 8-24. ConcreteObserver.as p
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Page 345 and 346: Example 8-26. QuarterBar.as (contin
Page 347 and 348: Example 8-27. QuarterGraph.as (cont
Page 349 and 350: Example 8-28. DataDesign.as (contin
Page 351 and 352: Summary The real test for a design
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Page 357 and 358: Further, discussing favoring compos
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Page 367 and 368: Not-So-Concrete Concrete Classes Th
Page 369 and 370: Example 9-11. PlayVideo.as (continu
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Page 375 and 376: Example 9-15. FlightPlan.as (contin
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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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