Vaadin 将子项添加到树表

发布于 2024-12-27 23:43:52 字数 687 浏览 0 评论 0原文

我尝试向树表添加一个子元素（元素是一个 Bean），但不知何故结果很奇怪。我举了一个小例子。

     BeanItemContainer<Project> bic = new BeanItemContainer<Project>(Project.class);
 TreeTable projectTable = new TreeTable();
 projectTable.setContainerDataSource(bic);

 bic.addBean(Root);
 bic.addBean(p1);
 bic.addBean(p2);
 bic.addBean(p3);

 projectTable.setParent(p1, Root);
 projectTable.setParent(p2, Root);
 projectTable.setParent(p3, p1);

正如您在最后一行中看到的，p1 应该是 p3 的父级，结果：参见图片。（p3 成为 p2 的子级）

可以从这里访问代码：goo.gl/BMXiv

有 2 个主要文件：

TttestApplication.class

Project.class

原文

I tried to add a child element to treetable (element is a Bean) but the somehow the result is weird. I put a small example together.

     BeanItemContainer<Project> bic = new BeanItemContainer<Project>(Project.class);
 TreeTable projectTable = new TreeTable();
 projectTable.setContainerDataSource(bic);

 bic.addBean(Root);
 bic.addBean(p1);
 bic.addBean(p2);
 bic.addBean(p3);

 projectTable.setParent(p1, Root);
 projectTable.setParent(p2, Root);
 projectTable.setParent(p3, p1);

As you can see in the last line p1 should be parent of p3, and the result :see the pic. (p3 become the children of p2)

Code can be accessed from here : goo.gl/BMXiv

There are 2 main files:

TttestApplication.class

Project.class

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伊面 2025-01-03 23:43:53

不幸的是，我无法解决上面的问题，所以我通过“addProjectToTree”加载bean
使用 addItem 时一切都会发生。

 .... beans' initialization
 Root = new Project("Projects","Indoor","HI", new Date(), new  Date(),this.getNextId(),null);
 ... 
 ... columns' creation
 projectTable.addContainerProperty("description", String.class, "");
 ... 
 ...
 addProjectToTree(Root);    

public Object addProjectToTree(Project p)
{
  Object id = projectTable.addItem(new Object[] {p.getDescription(),p.getKeyword() ...);
    if(p.getParentId()!=null)
    {
        projectTable.setParent(id, p.getParentId());
    }
    return id;
}

就是这样。

Unfortunatelly, I could not get over the issue above, so I load beans by 'addProjectToTree'
and everything happens as usually using addItem.

 .... beans' initialization
 Root = new Project("Projects","Indoor","HI", new Date(), new  Date(),this.getNextId(),null);
 ... 
 ... columns' creation
 projectTable.addContainerProperty("description", String.class, "");
 ... 
 ...
 addProjectToTree(Root);    

public Object addProjectToTree(Project p)
{
  Object id = projectTable.addItem(new Object[] {p.getDescription(),p.getKeyword() ...);
    if(p.getParentId()!=null)
    {
        projectTable.setParent(id, p.getParentId());
    }
    return id;
}

That's it.

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