Class KeyMapper

core/src/com/agateau/ui/KeyMapper.java:30–134

Implementation of InputMapper for keyboards

/** Implementation of InputMapper for keyboards */
public class KeyMapper implements InputMapper {
    // The UI instance can map multiple keycodes to the same VirtualKey, so the value type of this
    // map is an array of int.
    private final HashMap<VirtualKey, Integer[]> mKeysForVirtualKey = new HashMap<>();

    /** Create a KeyMapper to use when navigating UIs */
    public static KeyMapper createUiInstance() {
        KeyMapper mapper = new KeyMapper();
        mapper.setKey(VirtualKey.LEFT, Input.Keys.LEFT);
        mapper.setKey(VirtualKey.RIGHT, Input.Keys.RIGHT);
        mapper.setKey(VirtualKey.UP, Input.Keys.UP);
        mapper.setKey(VirtualKey.DOWN, Input.Keys.DOWN);
        mapper.setKey(VirtualKey.TRIGGER, Input.Keys.SPACE);
        mapper.setKey(VirtualKey.BACK, Input.Keys.ESCAPE);
        mapper.setKey(VirtualKey.PAUSE, Input.Keys.ESCAPE);
        mapper.setKey(VirtualKey.SCREENSHOT, Input.Keys.F9);

        mapper.addKey(VirtualKey.TRIGGER, Input.Keys.ENTER);
        if (!PlatformUtils.isDesktop()) {
            // Do not use CENTER or BACK on Desktop, it causes invalid enum value errors with lwjgl3
            mapper.addKey(VirtualKey.TRIGGER, Input.Keys.CENTER);
            mapper.addKey(VirtualKey.BACK, Input.Keys.BACK);
        }
        return mapper;
    }

    /**
     * Create a KeyMapper used by a player during actual play, not to navigate UIs (except when
     * picking 2nd-player specific settings)
     */
    public static KeyMapper createGameInstance(int playerIdx) {
        KeyMapper mapper = new KeyMapper();
        for (VirtualKey vkey : VirtualKey.values()) {
            int key = DefaultKeys.getDefaultKey(playerIdx, vkey);
            mapper.mKeysForVirtualKey.put(vkey, new Integer[] {key});
        }
        return mapper;
    }

    private KeyMapper() {}

    public void setKey(VirtualKey vkey, int key) {
        mKeysForVirtualKey.put(vkey, new Integer[] {key});
    }

    public void addKey(VirtualKey vkey, int key) {
        Integer[] keys = mKeysForVirtualKey.get(vkey);
        if (keys == null) {
            keys = new Integer[] {key};
        } else {
            keys = addToIntegerArray(keys, key);
        }
        mKeysForVirtualKey.put(vkey, keys);
    }

    public int getKey(VirtualKey virtualKey) {
        return mKeysForVirtualKey.get(virtualKey)[0];
    }