Swing/PopupMenuBlockLayer のバックアップ(No.4)

class DisableInputLayerUI extends LayerUI<JComponent> {
  private static final MouseAdapter dummyMouseListener = new MouseAdapter() {};
  private boolean isBlocking = false;
  @Override public void installUI(JComponent c) {
    super.installUI(c);
    JLayer jlayer = (JLayer)c;
    jlayer.getGlassPane().addMouseListener(dummyMouseListener);
    jlayer.setLayerEventMask(
      AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK |
      AWTEvent.MOUSE_WHEEL_EVENT_MASK | AWTEvent.KEY_EVENT_MASK);
  }
  @Override public void uninstallUI(JComponent c) {
    JLayer jlayer = (JLayer)c;
    jlayer.setLayerEventMask(0);
    jlayer.getGlassPane().removeMouseListener(dummyMouseListener);
    super.uninstallUI(c);
  }
  @Override public void eventDispatched(AWTEvent e, JLayer l) {
    if(isBlocking && e instanceof InputEvent) {
      ((InputEvent)e).consume();
    }
  }
  private static final String CMD_REPAINT = "lock";
  public void setLocked(boolean flag) {
    firePropertyChange(CMD_REPAINT,isBlocking,flag);
    isBlocking = flag;
  }
  @Override public void applyPropertyChange(PropertyChangeEvent pce, JLayer l) {
    String cmd = pce.getPropertyName();
    if(CMD_REPAINT.equals(cmd)) {
      l.getGlassPane().setVisible((Boolean)pce.getNewValue());
    }
  }
}