Stepper.java

---

class Stepper extends JPanel implements ActionListener
{
KeyboardIn keys = new KeyboardIn(this);

public Stepper()
{
addKeyListener(keys);
}

...


---

KeyboardIn.java

---


class KeyboardIn extends KeyAdapter
{ //Input from keyboard class for Treasure Game

Stepper sendTo; //Where to send events after processed

public KeyboardIn(Stepper listener)
{ //Take the Stepper we'll want to send things to.
sendTo = listener;
}

public void keyPressed(KeyEvent e)
{ //Process pressed keys
System.out.println("!");
switch (e.getKeyCode())
{ //Each key we care about has an associated binary flag. Add to it.
case KeyEvent.VK_LEFT: sendTo.takeKey(1); break;
case KeyEvent.VK_UP: sendTo.takeKey(2); break;
case KeyEvent.VK_RIGHT: sendTo.takeKey(4); break;
case KeyEvent.VK_DOWN: sendTo.takeKey(8); break;
case KeyEvent.VK_SPACE: sendTo.takeKey(16); break;
}
}

public void keyReleased(KeyEvent e)
{ //Process released keys
System.out.println("!");
switch (e.getKeyCode())
{ //Each key we care about has an associated binary flag. Subtract.
case KeyEvent.VK_LEFT: sendTo.takeKey(-1); break;
case KeyEvent.VK_UP: sendTo.takeKey(-2); break;
case KeyEvent.VK_RIGHT: sendTo.takeKey(-4); break;
case KeyEvent.VK_DOWN: sendTo.takeKey(-8); break;
case KeyEvent.VK_SPACE: sendTo.takeKey(-16); break;
}
}
}


---