// create components UI
this.view = new JPanel(new GridBagLayout());
this.tree = new JTree();
this.treeRenderer = new SearchTreeRenderer(null);
new NodeManager(this.tree, model, parameter);
this.locker = new LevelLocker();
this.locker.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
SearchTree.this.tree.requestFocus();
}
});