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how to rename a node in JTree when user clicks on the pop-up menu associated with the tree

Posted on 2001-07-03
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Last Modified: 2011-10-03
 I need to rename a node in a JTree. I can do it by setting JTree's setEditable to be true, but  that is not what i want.
  What i really want is that the users can right click on the pop-up menu "Rename" and then change the node name, just exactly like what the the window explorer does.
  Please help me.
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Question by:huer
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4 Comments
 
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Accepted Solution

by:
Ovi earned 200 total points
ID: 6251485
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;

public class EditableTree extends JFrame {
  private JTree tree;
  private DefaultTreeModel model;
  private TreePopup popup;
  private int x = 0, y = 0;

  public EditableTree() {
    init();
  }

  private void init() {
    setSize(200, 400);
    setLocation(200, 100);
    tree = new JTree();
    tree.addMouseListener(new TreeMouseAdapter());
    tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    tree.setShowsRootHandles(true);
    tree.setEditable(true);
    tree.putClientProperty("JTree.lineStyle", "Angled");
    popup = new TreePopup();
    getContentPane().add(new JScrollPane(tree));
    setVisible(true);
  }

  public void rename() {
    tree.startEditingAtPath(tree.getClosestPathForLocation(x, y));
  }

  class TreePopup extends JPopupMenu implements ActionListener {
    public TreePopup() {
      addItem(new JMenuItem("Rename"));
    }

    public void addItem(JMenuItem item) {
      item.addActionListener(this);
      add(item);
    }

    public void actionPerformed(ActionEvent ae) {
      String action = ae.getActionCommand();
      if(action.startsWith("Rename"))
        rename();
    }
  }

  class TreeMouseAdapter extends MouseAdapter {
    public void mousePressed(MouseEvent me) {
      checkPopup(me);
    }

    public void mouseReleased(MouseEvent me) {
      checkPopup(me);
    }
    public void checkPopup(MouseEvent me) {
      if(me.isPopupTrigger()) {
        int x = me.getX(); int y = me.getY(); rightPressed(x, y);
      }
    }

    public void rightPressed(int x1, int y1) {
      tree.setSelectionPath(tree.getClosestPathForLocation(x1, y1));
      x = x1;y = y1;
      popup.show(tree, x1, y1);
    }
  }

  public static void main(String[] args) {
    EditableTree editableTree1 = new EditableTree();
  }
}
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LVL 9

Expert Comment

by:Ovi
ID: 6251502
This is the exact behaviuor as in WindowsExplorer. The tree must be made editable, even if you want to programically edit an node. All you have to do is to right click a node and push the "Rename" popup item. If you want that a node to be selected only at a left mouse click, please comment the line : tree.setSelectionPath(tree.getClosestPathForLocation(x1, y1)); from the method TreeMouseAdapter.rightPressed(int, int) (in this moment if you do a right or left click the node becomes selected anyway - WindowsExplorer style).
0
 

Author Comment

by:huer
ID: 6253581
Thank you so much Qvi. You are really an expert in Java.
I tried the code you sent to me. It is just perfect.
Thank you!
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LVL 9

Expert Comment

by:Ovi
ID: 6254326
Any time.
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