[JAVA][Beginning Java 8 Games Development]

Chapter 11 ■ Moving Your Action Figure in 2D: Controlling the X and Y Display Screen Coordinates
Figure 11-16. Hold a left arrow (or A) and up arrow (or W) key down at the same time, and move the Actor diagonally
Let’s test the worst case scenario first, and see how powerful the JavaFX pulse event and key event handling
infrastructure really is. Press the up key and the left arrow key, or the A key and the W key, at the same time. As you
can see, the InvinciBagel character moves smoothly and steadily on a diagonal vector, up and to the left. The result of
this can be seen on the right half of Figure 11-16. Try using the individual keys as well, to make sure they are working.
As you play around with your now motion-enabled InvinciBagel sprite, notice that you are able to move him
behind the UI buttons at the bottom of the screen, as seen on the left half of Figure 11-17. This happens because you
have your .addGameActorNodes() method called before your .addNodesToStackPane() method is called, which gives
everything in your game a lower Z-index than everything in your user interface design. Also notice that you can move
the InvinciBagel off of the screen (out of view of the player), which we are going to address in Chapter 12, when you
will add to the existing code to establish boundaries and implement other advanced movement features. Finally, note
that if you use the left and right arrow keys (not the ASDW keys), the Button control focus (the blue outline) moves as
well, which means that we will also have to fix this in a future chapter, by having our KeyEvents “consumed.” As you
can see, there is lots of really cool code to write and things about Java 8 and JavaFX 8.0 to learn before we’re finished!
Figure 11-17. Notice the InvinciBagel character is using a lower Z-index than the UI elements, and can move off-screen
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