Solved

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

Posted on 2001-07-03
4
1,724 Views
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.
0
Comment
Question by:huer
  • 3
4 Comments
 
LVL 9

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();
  }
}
0
 
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!
0
 
LVL 9

Expert Comment

by:Ovi
ID: 6254326
Any time.
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
backtracking recursion  code 19 57
JList custom Cell Renderer refresh 15 56
arguments to jar 5 26
spring jars download 1 26
For customizing the look of your lightweight component and making it look opaque like it was made of plastic.  This tip assumes your component to be of rectangular shape and completely opaque.   (CODE)
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now