import javax.swing.* ;
import javax.swing.tree.* ;

public class GenealogyTree extends JTree {
    GenealogyModel model ;

    public GenealogyTree(Person graphNode) {
        super(new GenealogyModel(graphNode)) ;
        getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION) ;
        DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
        Icon personIcon = null;
        renderer.setLeafIcon(personIcon);
        renderer.setClosedIcon(personIcon);
        renderer.setOpenIcon(personIcon);
        setCellRenderer(renderer);
    }

    /**
    *   Get the selected item in the tree, and call showAncestor with this
    *   item on the model.
    */
    public void showAncestor(boolean b) {
        Object newRoot=null ;
        TreePath path=getSelectionModel().getSelectionPath() ;
        if (path!=null) newRoot=path.getLastPathComponent() ;
        ((GenealogyModel)getModel()).showAncestor(b,newRoot) ;
    }

}