private void updateButtons() {
int index = list.getSelectedIndex();
remove.setEnabled(index != -1 && listModel.getSize() != 0);
moveUp.setEnabled(index > 0);
moveDown.setEnabled(index != -1 && index != listModel.getSize() - 1);
edit.setEnabled(index != -1);
}
/** Listener to handle service list selection changes */
public void valueChanged(ListSelectionEvent e) {
if (service_list.getSelectedIndex() == -1) {
remove_service_button.setEnabled(false);
} else {
remove_service_button.setEnabled(true);
}
}