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87 lines
1.7 KiB
87 lines
1.7 KiB
package net.sector.input;
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import java.util.Arrays;
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import org.lwjgl.input.Keyboard;
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/**
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* Key state handler
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*/
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public class Keys {
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private static boolean[] prevKeys;
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private static boolean[] keys;
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/**
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* initialize key state handler
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*/
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public static void init() {
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keys = new boolean[Keyboard.KEYBOARD_SIZE];
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Arrays.fill(keys, false);
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prevKeys = new boolean[Keyboard.KEYBOARD_SIZE];
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Arrays.fill(prevKeys, false);
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}
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/**
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* method called when key event was detected in Screen class.
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*
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* @param key
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* @param down
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*/
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public static void onKey(int key, boolean down) {
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prevKeys[key] = keys[key];
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keys[key] = down;
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}
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/**
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* Check if key is down
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*
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* @param key key index
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* @return is down
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*/
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public static boolean isDown(int key) {
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return keys[key];
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}
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/**
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* Check if key is up
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*
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* @param key key index
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* @return is up
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*/
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public static boolean isUp(int key) {
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return !keys[key];
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}
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/**
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* Check if key was just pressed (changed state since last event on this
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* key)
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*
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* @param key key index
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* @return true if changed state to DOWN
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*/
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public static boolean justPressed(int key) {
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return !prevKeys[key] && keys[key];
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}
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/**
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* Check if key was just released (changed state since last event on this
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* key)
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*
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* @param key key index
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* @return true if changed state to UP
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*/
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public static boolean justReleased(int key) {
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return prevKeys[key] && !keys[key];
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}
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/**
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* Destroy "just" flag for a key.
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*
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* @param key key index
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*/
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public static void destroyChangeState(int key) {
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prevKeys[key] = keys[key];
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}
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}
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