class Scene: SKScene {
  override func update(currentTime: NSTimeInterval) {
    super.update(currentTime)

    if (Keyboard.sharedKeyboard.justPressed(KeyCode.Space)) {
      // single key
    } else if (Keyboard.sharedKeyboard.pressed(KeyCode.Space, KeyCode.Return)) {
      // two keys
    } else if (Keyboard.sharedKeyboard.justReleased(KeyCode.Space, KeyCode.W, KeyCode.T, KeyCode.LeftShift)) {
      // many keys
    }
  }

  override func didFinishUpdate() {
    Keyboard.sharedKeyboard.update()
  }

  override func keyUp(theEvent: NSEvent) {
    Keyboard.sharedKeyboard.handleKey(theEvent, isDown: false)
  }

  override func keyDown(theEvent: NSEvent) {
    Keyboard.sharedKeyboard.handleKey(theEvent, isDown: true)
  }
}