private void init() {
downloaders = getDownloaders();
JScrollPane scroller = new JScrollPane();
list = new JCheckableList(downloaders);
list.setActionListener(this);
list.addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent arg0) {
settingsBtn.setEnabled(((CheckableItem) list.getSelectedValue()).getDownloader().hasSettings());
}