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package com.senocular.utils {
import flash.display.Stage;
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.utils.Proxy;
import flash.utils.flash_proxy;
/**
* The KeyObject class recreates functionality of
* Key.isDown of ActionScript 1 and 2
*
* Usage:
* var key:KeyObject = new KeyObject(stage);
* if (key.isDown(key.LEFT)) { ... }
*/
dynamic public class KeyObject extends Proxy {
private static var stage:Stage;
private static var keysDown:Object;
public function KeyObject(stage:Stage) {
construct(stage);
}
public function construct(stage:Stage):void {
KeyObject.stage = stage;
keysDown = new Object();
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
}
flash_proxy override function getProperty(name:*):* {
return (name in Keyboard) ? Keyboard[name] : -1;
}
public function isDown(keyCode:uint):Boolean {
return Boolean(keyCode in keysDown);
}
public function deconstruct():void {
stage.removeEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.removeEventListener(KeyboardEvent.KEY_UP, keyReleased);
keysDown = new Object();
KeyObject.stage = null;
}
private function keyPressed(evt:KeyboardEvent):void {
keysDown[evt.keyCode] = true;
}
private function keyReleased(evt:KeyboardEvent):void {
delete keysDown[evt.keyCode];
}
}
}
