从CellEditorListener获取编辑的TreeNode [英] Get Edited TreeNode from a CellEditorListener

问题描述

早些时候，我问了如何在重命名TreeNode时触发一个事件（这里）。我的问题回答了，但我遇到了另一个问题。我需要访问在CellEditorListener的editingStopped事件中编辑的TreeNode。这是我必须这样做的代码：

  package com.gamecreator; 
 
 import javax.swing.event.CellEditorListener; 
 import javax.swing.event.ChangeEvent; 
 import javax.swing.tree.DefaultTreeCellEditor; 
 
 public class CustomCellEditorListener实现CellEditorListener {
 public CustomCellEditorListener（）{
 
} 
 
 public void editingCanceled（ChangeEvent e）{
 
} 
 
 public void editingStopped（ChangeEvent e）{
 DefaultTreeCellEditor editor =（DefaultTreeCellEditor）e.getSource（）; //这给我错误。 
 CustomTreeNode node = //我在这里放什么??? 
 node.getResource（）。setName（（String）node.getUserObject（））; 
 
 //调试
 System.out.println（node.getResource（）。getName（））; 
} 
} 
  

我收到这个错误：

线程中的异常AWT-EventQueue-0java.lang.ClassCastException：
javax.swing.tree.DefaultTreeCellEditor $ 1不能转换为
javax.swing.tree.DefaultTreeCellEditor

编辑：
在另一个尝试中，我在CustomCellEditorListener

  public void editingStopped（ChangeEvent e）{
 TreePath path =（（CustomTreeCellEditor）e.getSource（））。getLastPath （）; //这给我错误。 
 CustomTreeNode node =（CustomTreeNode）path.getLastPathComponent（）; 
 node.getResource（）。setName（（String）node.getUserObject（））; 
 
 //调试
 System.out.println（node.getResource（）。getName（））; 
} 
  

而CustomTreeCellEditor中的此代码

  public TreePath getLastPath（）{
 return lastPath; 
} 
  

我有同样的错误（我预计我会的）。我应该工作，所以剩下的唯一真正的问题是，为什么我得到错误，我该怎么解决？但是如果有更好的方法来完成这个，我愿意听。 p>

编辑2：
我已经做了一个小小的例子，我正在尝试完成，可以找到这里（这是一个Eclipse档案）。

解决方案

我发现一个解决方案其实很简单。当TreeNode重命名时，它最终成为树中唯一选定的节点。因此，我可以使用：

  CustomTreeNode node =（CustomTreeNode）tree.getLastSelectedPathComponent（）; 
  

Earlier I asked how to fire an event when a TreeNode was renamed (here). My question was answered, but I ran into another problem. I need to access the TreeNode that is being edited in the CellEditorListener's editingStopped event. This is the code I have to do so:

package com.gamecreator;

import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.tree.DefaultTreeCellEditor;

public class CustomCellEditorListener implements CellEditorListener {
    public CustomCellEditorListener() {

    }

    public void editingCanceled(ChangeEvent e) {

    }

    public void editingStopped(ChangeEvent e) {
        DefaultTreeCellEditor editor = (DefaultTreeCellEditor) e.getSource(); //This gives me the error.
        CustomTreeNode node = //What do I put here???;
        node.getResource().setName((String) node.getUserObject());

        //For debugging
        System.out.println(node.getResource().getName());
    }
}

I get this error:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.tree.DefaultTreeCellEditor$1 cannot be cast to javax.swing.tree.DefaultTreeCellEditor

EDIT: In another attempt, I used this code in the CustomCellEditorListener

public void editingStopped(ChangeEvent e) {
    TreePath path = ((CustomTreeCellEditor) e.getSource()).getLastPath();  //This gives me the error.
    CustomTreeNode node = (CustomTreeNode) path.getLastPathComponent();
    node.getResource().setName((String) node.getUserObject());

    //For debugging
    System.out.println(node.getResource().getName());
}

and this code in the CustomTreeCellEditor

public TreePath getLastPath() {
    return lastPath;
}

I got the same error (I expected I would). What I have should work, so the only real question remaining is, "Why am I getting the error and how can I fix it?," but if anyone has a better way to accomplish this, I'm willing to listen.

EDIT 2: I have made a small example of what I'm trying to accomplish that can be found here (It's an Eclipse archive).

解决方案

I found a solution that was actually very simple. When a TreeNode is renamed, it ends up being the only selected node in the tree. Because of that, I was able to use:

    CustomTreeNode node = (CustomTreeNode) tree.getLastSelectedPathComponent();

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