[JAVA][Beginning Java 8 Games Development]

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Chapter 11 ■ Moving Your Action Figure in 2D: Controlling the X and Y Display Screen Coordinates Update Splashscreen Scene Graph: .createSplashScreenNodes() Now the time has come to reorganize our .createSplashScreenNodes() method body, and then we will be ready to get into “wiring up” the JavaFX pulse engine that we created in our GamePlayLoop.java class to the Actor object that we created using our Actor.java, Hero.java and Bagel.java classes. We have already removed four lines of code from the end of the .createSplashScreenNodes() method, and placed them into the .loadImageAssets() method, where they more logically belong. The other thing that we need to do to try and streamline our .start() method is to group the ActionEvent handling structures with each of their respective object instantiations and configuration Java statements. Thus, your gameButton object instantiation, configuration, and event handling will all be kept together in one place, for instance. We will do the same thing for the helpButton, scoreButton, and legalButton objects. The event handling structures that I copied from the .start() method into the .createSplashScreenNodes() method are shown here in bold. The new .createSplashScreenNodes() method body will contain the following three dozen lines of Java code: private void createSplashScreenNodes() { buttonContainer = new HBox(12); buttonContainer.setAlignment(Pos.BOTTOM_LEFT); buttonContainerPadding = new Insets(0, 0, 10, 16); buttonContainer.setPadding(buttonContainerPadding); gameButton = new Button(); gameButton.setText("PLAY GAME"); gameButton.setOnAction((ActionEvent) -> { splashScreenBackplate.setVisible(false); splashScreenTextArea.setVisible(false); }); helpButton = new Button(); helpButton.setText("INSTRUCTIONS"); helpButton.setOnAction((ActionEvent) -> { splashScreenBackplate.setVisible(true); splashScreenTextArea.setVisible(true); splashScreenTextArea.setImage(instructionLayer); }); scoreButton = new Button(); scoreButton.setText("HIGH SCORES"); scoreButton.setOnAction((ActionEvent) -> { splashScreenBackplate.setVisible(true); splashScreenTextArea.setVisible(true); splashScreenTextArea.setImage(scoresLayer); }); legalButton = new Button(); legalButton.setText("LEGAL & CREDITS"); legalButton.setOnAction((ActionEvent) -> { splashScreenBackplate.setVisible(true); splashScreenTextArea.setVisible(true); splashScreenTextArea.setImage(legalLayer); }); buttonContainer.getChildren().addAll(gameButton, helpButton, scoreButton, legalButton); splashScreenBackplate = new ImageView(); splashScreenBackplate.setImage(splashScreen); splashScreenTextArea = new ImageView(); splashScreenTextArea.setImage(instructionLayer); } 240 www.it-ebooks.info
Chapter 11 ■ Moving Your Action Figure in 2D: Controlling the X and Y Display Screen Coordinates Notice that since the .loadImageAssets() method is called before the .createSplashScreenNodes() method, that we can still keep the last four lines of code in the method body that reference the loaded Image assets in place. This is because the splashScreen and instructionLayer Image objects have been created, and loaded with their digital image assets, in the top part of the .loadImageAssets() method. Since this method is called inside the .start() method before the .createSplashScreenNodes() method is called, these objects can be safely used inside of this method body. As you can see in Figure 11-10, the new method is error-free and all of the objects, including the HBox named buttonContainer, Button(s) named gameButton, helpButton, scoreButton and legalButton, and ImageView(s) named splashScreenBackplate and splashScreenTextArea, are all logically grouped together, and are now well organized. Figure 11-10. Copy .setOnAction() event handlers from the .start() method into the .createSplashScreenNodes() method Since we don’t have to do anything to your .addNodesToStackPane() method, we are finished with the code reorganization that we needed to do here, before we take this game to the next level of complexity! Every now and then, you need to go back and make sure that your programming logic is optimally structured, so that when you build more complex structures, you have a solid foundation to build upon, just like you’re building a real building structure. www.it-ebooks.info 241
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Contents at a Glance About the Auth
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Introduction The Java Programming L
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■ Introduction In Chapter 13 you
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Chapter 1 ■ Setting Up a Java 8 G
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Chapter 2 Setting Up Your Java 8 ID
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Chapter 2 ■ Setting Up Your Java
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Profiling Your Java 8 Game Applicat
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Chapter 3 ■ A Java 8 Primer: An I
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Chapter 5 An Introduction to Game D
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Chapter 8 Creating Your Actor Engin
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Chapter 8 ■ Creating Your Actor E
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Chapter 9 Controlling Your Action F
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Chapter 13 ■ Animating Your Actio
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Chapter 14 ■ Setting Up the Game
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Chapter 15 Implementing Game Audio
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Chapter 15 ■ Implementing Game Au
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Chapter 16 ■ Collision Detection:
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Chapter 17 Enhancing Game Play: Cre
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Chapter 17 ■ Enhancing Game Play:
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■ index Background image (cont.)
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■ index InvinciBagel animation (c
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■ index Modifier keywords access
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Beginning Java 8 Games Development
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This Java 8 Game Development book i
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■ Contents NetBeans 8.0 Is User I
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■ Contents ■■Chapter 5: An In
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■ Contents Creating a Hero Superc
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■ Contents Organizing the .update
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■ Contents Optimizing the Scene G
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About the Author Wallace Jackson ha
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Acknowledgments I would like to ack
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