link.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
GraphModel model = Lookup.getDefault().lookup(GraphController.class).getModel();
HierarchicalGraph graph = model.getHierarchicalGraphVisible();
graph.resetViewToLeaves();
}
});
GridBagConstraints gdc = new GridBagConstraints(0, height + 1, 1, 1, 1, 1, GridBagConstraints.PAGE_START, GridBagConstraints.HORIZONTAL, new Insets(0, 4, 0, 0), 0, 0);
levelViewPanel.add(link, gdc);
}