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

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Figure 4-6. Paper doll with two different decoration sets Instead of paper dolls, any component could be decorated with any characteristics. Also, you can include more than a single property or method in a decoration. In the next section, we’ll take a look at adding additional properties with the Decorator design pattern. Applying a Simple Decorator Pattern in Flash: Paper Doll | 147
Decorating with Deadly Sins and Heavenly Virtues Action gaming pits different kinds of heroes and villains against one another, and the combatants have different weapons and shields. That is, they’re decorated with different characteristics and abilities. In order to see how to add some more functions to a Decorator pattern, what could be more appropriate than pitting good against evil? Table 4-1 shows a list of deadly sins and heavenly virtues. (The list is considerably updated from Dante’s Inferno and Prudentius’ epic poem, Psychomachia, both of whom I understand were using Commodore-64’s to make their lists.) Table 4-1. Decorations of good and evil Deadly Sin Description Virtue Description Rage Uncontrolled anger—striking out at syntax errors Malice Meanness, malevolence, ill will, cruelty, and hatred toward others–unkind remarks about Linux. Obfuscation Hiding the truth— redefining an act, knowledge by adding confusion—coding without comments Arrogance Excessive pride, not considering others’ beliefs, feelings, or knowledge—belief that Microsoft Windows is the only real OS Prejudice Judging others on the basis of stereotypes and not their actions—teasing Mac users Dogmatisms Narrow, inflexible belief even in light of evidence to the contrary—continue to use procedural programming methods Indifference Seeing suffering and doing nothing or not even caring to help—unwilling to offer help in learning OOP Thinking about what has been presented so far in this chapter, the first thing that comes to mind is a property that describes each of the deadly sins and heavenly virtues. That’s easy enough, because just like the paper doll example, all we have to do is to assign a property value to each decorator. However, we can do more with the Decorator design pattern, as you’ll see in the next two sections. 148 | Chapter 4: Decorator Pattern Compassion Caring about others—Helping procedural programmers transition to OOP Courage Doing the right thing regardless of the danger—taking on object-oriented programming Hope Belief in eventual success of good over evil—you really can complete the project on time Justice A fair balance and even chance—using Windows, Mac OS, and Linux Openness Capacity to consider new knowledge, ideas, and contrary ideas—writing a program on a Mac Integrity Maintaining values even when tempted to abandon them for short term gains—foregoing hacks even though they’d get the job done and the client would never know Diligence Willingness to stick with an especially difficult task to complete it—learning design patterns
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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
Page 117 and 118: Example 2-34. AlienShip.as } } } }
Page 119 and 120: Example 2-36. Weapon.as (continued)
Page 121 and 122: Concrete Creator Classes Until we e
Page 123 and 124: in teamwork, the Singleton can be u
Page 125 and 126: To create a class, we need a public
Page 127 and 128: Example 3-4. Singleton.as package {
Page 129 and 130: Figure 3-3. Compiler not finding cl
Page 131 and 132: However, does that mean that only a
Page 133 and 134: Figure 3-5. Two instance labels and
Page 135 and 136: Example 3-10. Alert.as } } { Alert.
Page 137 and 138: However, had we done that, we would
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Page 141 and 142: MP3 file in the same folder, and re
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Page 148 and 149: PART III III.Structural Patterns Tr
Page 150 and 151: Chapter 4 CHAPTER 4 Decorator Patte
Page 152 and 153: like abstract classes, simply by no
Page 154 and 155: simple inheritance. Depending on ho
Page 156 and 157: Minimalist Abstract Decorator To ge
Page 158 and 159: eral months. Using a Decorator desi
Page 160 and 161: Example 4-5. DecConB.as package { /
Page 162 and 163: Applying a Simple Decorator Pattern
Page 164 and 165: If you want to create more concrete
Page 166 and 167: Example 4-15. Muff.as package { pub
Page 170 and 171: Adding Properties and Methods Up to
Page 172 and 173: Decorating with Multiple Properties
Page 174 and 175: } override public function evil( ):
Page 176 and 177: Example 4-25. Compassion.as package
Page 178 and 179: Deadly sins Example 4-29. Rage.as p
Page 180 and 181: Example 4-33. Dogmatisms.as package
Page 182 and 183: class window in the Dual.fla Proper
Page 184 and 185: Example 4-37. Soul.as (continued) }
Page 186 and 187: Imagine that you are responsible fo
Page 188 and 189: Example 4-41. Accord.as (continued)
Page 190 and 191: Example 4-45. GPS.as package { publ
Page 192 and 193: Example 4-48. Deal.as 16 internal v
Page 194 and 195: Example 4-48. Deal.as 120 { 121 tra
Page 196 and 197: Figure 4-8. Decorator user interfac
Page 198 and 199: Chapter 5 CHAPTER 5 Adapter Pattern
Page 200 and 201: and their functionality to figure o
Page 202 and 203: Example 5-4. Main.as (continued) }
Page 204 and 205: Example 5-5. Adaptee.as package { p
Page 206 and 207: methods and properties to accomplis
Page 208 and 209: Example 5-9. LegacyCar.as 47 } 48 4
Page 210 and 211: ignition key of the car (assume tha
Page 212 and 213: Example 5-11. CarAdapter.as (contin
Page 214 and 215: Note that the new interface turns t
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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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