如何让eclipse向导在页面上像树一样工作？

import org.eclipse.jface.viewers.*;
import org.eclipse.jface.wizard.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class TreeWizard extends Wizard implements IWizard {

    private TreePage treePage;

    public TreeWizard() {
        setWindowTitle("Tree Wizard");
    }

    @Override
    public void addPages() {
        treePage = new TreePage();
        addPage(treePage);
    }

    @Override
    public boolean performFinish() {
        // 处理向导完成时的逻辑
        return true;
    }

    private class TreePage extends WizardPage {

        private TreeViewer treeViewer;

        protected TreePage() {
            super("Tree Page");
            setTitle("Tree Page");
            setDescription("Select an item from the tree.");
        }

        @Override
        public void createControl(Composite parent) {
            Composite container = new Composite(parent, SWT.NONE);
            container.setLayout(new FillLayout());

            treeViewer = new TreeViewer(container, SWT.BORDER);
            treeViewer.setContentProvider(new MyTreeContentProvider());
            treeViewer.setLabelProvider(new LabelProvider());

            treeViewer.setInput(createTreeModel()); // 设置树形数据模型

            setControl(container);
        }

        private Object createTreeModel() {
            // 创建树形数据模型
            // 返回根节点
            return null;
        }
    }

    private class MyTreeContentProvider implements ITreeContentProvider {

        @Override
        public Object[] getElements(Object inputElement) {
            // 返回根节点的子节点
            return null;
        }

        @Override
        public Object[] getChildren(Object parentElement) {
            // 返回指定节点的子节点
            return null;
        }

        @Override
        public Object getParent(Object element) {
            // 返回指定节点的父节点
            return null;
        }

        @Override
        public boolean hasChildren(Object element) {
            // 判断指定节点是否有子节点
            return false;
        }
    }
}