TreeNode « JTree « Java Swing Q&A





1. Java TreeNode: How to prevent getChildCount from doing expensive operation?    stackoverflow.com

I'm writing a Java Tree in which tree nodes could have children that take a long time to compute (in this case, it's a file system, where there may be network ...

2. more than one top level TreeNode is possible?    stackoverflow.com

first time use JTree. Just wondering is it possible to have more than one top level TreeNodes? thanks

3. How can I make a TreeNode change the cursor when the mouse hovers over it?    stackoverflow.com

I have created a menu using a treeview to launch forms when the user clicks on a node. To complete the look-and-feel, I have set up the nodes to look ...

4. Why are TreePath constructed by Object[] instead of TreeNode[]?    stackoverflow.com

From the Java API, it seems that nodes of a JTree are instances of TreeNode. In addition, all TreePaths returned seems to be instances of TreeNode. So, why are ...

5. comparing two TreeNode (or DefaultMutableTreeNode) objects in Java Comparator    stackoverflow.com

My goal is very simple today, I am trying to work out the proper way to implement compareTo (or the Comparable) interface for my class which extends DefaultMutableTreeNode. The problem is this: ...

6. how I can save 2 value(text & value of that text) to a jtree node    stackoverflow.com

I create a Jtree in java, I would like to add 2 value to each node , I mean is it possible we have 2 value in each node? for example ...

7. How can I cast String to TreeNode in java Swing?    stackoverflow.com

Is it possible to convert String to TreeNode in java Swing? If yes, how?

8. Treenode image    coderanch.com

9. TreeNode Problem...    coderanch.com





11. TreeNode ClassCastException?    coderanch.com

hi, here it is. this code displays the filesystem inside a jtree. just start it with some existing path like c:\. after 3 seconds a method is called and the exception occurs..... import javax.swing.*; import javax.swing.tree.TreeModel; import javax.swing.tree.TreePath; import javax.swing.event.TreeModelListener; import javax.swing.event.TreeModelEvent; import javax.swing.event.EventListenerList; import java.util.List; import java.util.ArrayList; import java.util.Map; import java.util.*; import java.util.HashMap; import java.io.File; import java.io.Serializable; import javax.swing.tree.*; public ...

12. JTree TreeNode question    coderanch.com

Assuming you are asking how to do this programatically visavis with the mouse import java.awt.*; import java.awt.event.*; import java.util.Enumeration; import javax.swing.*; import javax.swing.tree.*; public class ExpansionTest { TreeNode selectedNode; public ExpansionTest() { String[] names = new String[] { // branches |<-- child leaf nodes -->| "hawks", "gray", "red-tailed", "rough-legged", "falcons", "harrier", "kestrel", "kite", "owls", "barred", "saw-whet", "snowy" }; JTree tree = ...

13. How to disable a certain treenode in a jtree    coderanch.com

Hi. I am not sure if it is the good solution, but at list it works. Here the code: import javax.swing.JTree; import java.awt.Component; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.DefaultTreeModel; import javax.swing.tree.DefaultTreeCellRenderer; import javax.swing.tree.TreePath; import javax.swing.event.TreeExpansionListener; import javax.swing.event.TreeExpansionEvent; public class MyTree extends JTree implements TreeExpansionListener{ DefaultMutableTreeNode root = new DefaultMutableTreeNode("root"); public MyTree() { this.setTree(); this.setModel(new DefaultTreeModel(root)); this.setCellRenderer(new MyCellRenderer()); this.addTreeExpansionListener(this); } public void setTree() { ...

14. Whats the best way to change background of treeNode in JTree    coderanch.com

Greetings Ranchers, I'm trying to change the background of a treeNode to get a hovering effect on mouseOver(); evrything seems to work so far...except I'm updating my whole tree UI; this is causing flickering of my cursor. Is there another way of changing the background of tree node without whole tree updateUI() ? //In TreeRenderer if (selected)// selection flag { setForeground(Color.white); ...

16. Cloning a TreeNode.........    coderanch.com

That was not for you. It was for the admins. We have a strict naming policy here at javaranch. One of the admins has posted you a private message asking you to change your display name from Lohith S. Ok I have changed my display name from Lohith S to Lohith....... but still i didn't get reply to my problem.........





17. Treenode from Object    coderanch.com

Hello! This is more a general question about datastrucutre and objects. However as there is only a Tree structure in the swing packages - and my question is about the jTree I hope it's ok to post my question here... I have a list of vehicle objects with the following attributes: Name Typ Subtyp Farbe --------------------------------------------------------------------------- Audi A4 Auto Cabrio red ...

18. JTree-->TreeNode-->Blinking gif image    coderanch.com

19. how to set treenode as "being edited"?    coderanch.com

20. equals() failing in userObject of TreeNode    java-forums.org

I'm not exactly sure how to ask this question, since my code is very long and has many pieces and I have no idea where the problem is. I have a drag and drop implementation that usually works fine (I am using a JTree); However, with this particular program it is doing the following: When I drag a node to itself, ...

21. JTree - Implementing TreeNode question    java-forums.org

Hi, I'm trying to use a JTree as a UI to a database table (the lazy way - only querying what i need when i need it). For some reason, though I implemented all the methods needed, The JTree only displays the root and nothing else. creating th JTree: Java Code: public class LibraryBrowser extends JFrame { private static final long ...

22. Getting a TreeNode on a JTree    forums.oracle.com

23. Jtree and TreeNode interface    forums.oracle.com

I am trying to create a custom node (a node with a jlabel and a textfield) for a a JTree. I am not entirely sure how to accomplish this, so I a certain route. I tried to create a custom class that extends JLabel and implements TreeNode. Is this the way to do it?