Define a key (for example escape) that switches the GUI on and off. You can either overlay the running game with the GUI (you will most likely pause the game then), or even project it as a texture onto a mesh texture (but then you cannot click to select). On this page, we look at the overlay variant (more commonly used).
This code shows you how to overlay anything on the screen with the GUI. This is the most common usecase.
NiftyJmeDisplay niftyDisplay = new NiftyJmeDisplay( assetManager, inputManager, audioRenderer, guiViewPort); /** Create a new NiftyGUI object */ Nifty nifty = niftyDisplay.getNifty(); /** Read your XML and initialize your custom ScreenController */ nifty.fromXml("Interface/helloworld.xml", "start", new MySettingsScreen(data)); // attach the Nifty display to the gui view port as a processor guiViewPort.addProcessor(niftyDisplay); // disable the fly cam flyCam.setDragToRotate(true);
The MySettingsScreen
class is a custom de.lessvoid.nifty.screen.ScreenController in which you implement your GUI behaviour. The variable data
contains an object that you use to exchange state info with the game. See Nifty GUI Java Interaction for details on how we created this class.