/** Reaction to buttons and combo boxes. */
 public void actionPerformed(ActionEvent e) {
   String cmd = e.getActionCommand();
   if (cmdCtrlProp.equals(cmd)) {
     try {
       Class c =
           Class.forName("aurora.hwc.control.Panel" + myController.getClass().getSimpleName());
       AbstractPanelController cp = (AbstractPanelController) c.newInstance();
       cp.initialize(myController, null);
     } catch (Exception ex) {
     }
   }
   if (cmdCtrlList.equals(cmd)) {
     JComboBox cb = (JComboBox) e.getSource();
     if (cb.getSelectedIndex() > 0) {
       myController = (AbstractControllerComplex) listCControllers.getSelectedItem();
       buttonProp.setEnabled(true);
     } else {
       buttonProp.setEnabled(false);
       myController = null;
     }
     myMonitor.setMyController(myController);
   }
   return;
 }