[JAVA][Beginning Java 8 Games Development]

Chapter 6 ■ The Foundation of Game Design: The JavaFX Scene Graph and the InvinciBagel Game Infrastructure
Scene Graph Assets: Installing the ImageView’s Image Assets in Your Project
To reference the digital image assets inside the JAR file in your Java code, you have to insert a forward slash before the
file name. Before you can reference the files, however, you must copy these image files from the book repository into
the Computer/ComputerName/Users/user/MyDocuments/NetBeansProjects/InvinciBagel/src folder, as shown
on the left-hand side (and the top) of Figure 6-6. You can also see how these digital image assets will composite, as the
background plate invincibagelsplash PNG24 has a spot for the other three PNG32 images to overlay (cover). The white
areas seen in the composite ImageView assets are actually transparent! Now, you are ready!
Figure 6-6. Windows 7 Explorer file management utility, showing a PNG24 splash screen and three PNG32 overlays
JavaFX UI Classes: HBox, Pos, Insets, and ImageView
Let’s take a break from coding for an in-depth look at some of the new classes you are going to use to complete your
top-level game application UI design. These include the Pos class (positioning); the Insets class (padding); the HBox
class (UI layout container); the Image class (digital image container); the ImageView class (digital image display);
and the TableView class (table data display), which you will study here but implement in code later in your game
development once the game is completely finished. You will examine these in order, from simplest (Pos) to most
complex (TableView), and then code the .createSplashScreenNodes() and .addNodesToStackPane() methods,
which use these new classes (objects).
The JavaFX Pos Class: Generalized Screen Position Constants
The Pos class is an Enum class, which stands for “enumeration.” This class contains a list of constants that are
translated into integer values for use in the code. The constant values (in this case, positioning constants, such as TOP,
CENTER, and BASELINE) make it easier for programmers to use these values in their code.
www.it-ebooks.info
129