static <A extends JComponent> A bindToComponent(A component, final Runnable onShow, final Runnable onUnShow) {
  component.addAncestorListener(new AncestorListener() {
    public void ancestorAdded(AncestorEvent event) {
      callF(onShow);
    }

    public void ancestorRemoved(AncestorEvent event) {
      callF(onUnShow);
    }

    public void ancestorMoved(AncestorEvent event) {
    }
  });
  ret component;
}