// removeAll on hide!!!
public void show(Component invoker, int x, int y) {
ControlPanel panel = (ControlPanel) invoker.getParent();
control = (LawControl) panel.getControl();
removeAll();
String[] names = control.getPresetNames();
if (names == null) return;
for (int i = 0; i < names.length; i++) {
JMenuItem item = new JMenuItem(names[i]);
add(item);
item.addActionListener(this);
}
// create dynamic menu here
super.show(invoker, x, y);
}
public void actionPerformed(ActionEvent event) {
control.applyPreset(event.getActionCommand());
}