case KeyEvent.VK_CONTROL: control = true; break;
case KeyEvent.VK_ALT: alt = true; break;
case KeyEvent.VK_SHIFT: shift = true; break;
case KeyEvent.VK_CONTROL: control = true; break;
case KeyEvent.VK_ALT: alt = true; break;
case KeyEvent.VK_SHIFT: shift = true; break;