UnionFindVisualizer.java 文件源码

private JComponent createInfoPanel(Component view) {
    final JLabel infoLabel = new JLabel();
    infoLabel.setVerticalAlignment(JLabel.TOP);
    if (view instanceof TreeView) {
        final TreeView treeView = (TreeView) view;
        view.addMouseMotionListener(new MouseMotionAdapter() {
            @Override
            public void mouseMoved(MouseEvent evt) {
                infoLabel.setText(treeView.getInfoText(evt));
            }
        });
    }

    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setMinimumSize(new Dimension(0, 0));
    scrollPane.setViewportView(infoLabel);
    return scrollPane;
}