如何在Tapestry网格中实现分页改变事件

// Java类文件
import org.apache.tapestry5.annotations.OnEvent;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.grid.GridDataSource;
import org.apache.tapestry5.grid.SortConstraint;
import org.apache.tapestry5.internal.grid.CollectionGridDataSource;

public class MyGridComponent {

    @Property
    private GridDataSource dataSource;

    @Property
    private List<MyData> gridData;

    @Property
    private int currentPage;

    @Property
    private int pageSize;

    public void setupRender() {
        // 初始化数据源和分页参数
        gridData = loadData();
        dataSource = new CollectionGridDataSource(gridData);
        currentPage = 1;
        pageSize = 10;
    }

    @OnEvent(value = "pagechange")
    public void onPageChange(int newPage) {
        // 更新当前页码
        currentPage = newPage;
        // 更新数据源
        gridData = loadData();
        dataSource = new CollectionGridDataSource(gridData);
    }

    private List<MyData> loadData() {
        // 根据当前页码和每页记录数，从数据库或其他数据源中获取数据
        // 这里只是一个示例，实际情况需要根据具体业务逻辑进行实现
        int startIndex = (currentPage - 1) * pageSize;
        int endIndex = startIndex + pageSize;
        return myDataService.getData().subList(startIndex, endIndex);
    }
}

<!-- 模板文件 -->
<t:grid source="dataSource" rowsPerPage="pageSize">
    <!-- 网格列定义 -->
</t:grid>

<t:gridpager source="dataSource" currentPage="currentPage" maxPages="10" />

<t:pagelink t:event="pagechange" t:context="1">1</t:pagelink>
<t:pagelink t:event="pagechange" t:context="2">2</t:pagelink>
<!-- 其他页码链接 -->