Tabstops in javascript tree nodes

I have created a tree structure in javascript. (bear in mind, I'm new to js). I have all of the info in the tree that I want, but I would like to add some tabstops to my lowest-level nodes.
The tree consists of 3 levels, which should be organized as such:
-Level 1: product type
-Level 2: brand
-Level 3: model <tab> msrp <tab> my price
All of the data is in the right place, but I can't figure out how to get the tab stops in the lowest node. I would find it most intuitive to make the bottom node into a table row, and make each info piece a different cell. This blows up my table when I try.
Here's a basic idea of how my tree is constructed:
<script type="text/javascript" src="dtree.js"></script>
<script>
d = new dTree('d');
d.add(0,-1,'My Product Line');
d.add(1,0,'Widgets');
d.add(2,1,'WidgetBrand');
d.add(3,2,'<INPUT TYPE="checkbox" NAME="Item1" VALUE="model1" onClick="clickFunction"> The Model � $299 � $<input type="text" name="model_Price" value="278" ');The tree function is a large file, so I won't put it in here. Hopefully this is enough info to get me rolling. I don't want to use the "nbsp" characters in the last node because it strews the columns all over the place when I get a bunch of rows (level 3 nodes).
Any help would be greatly appreciated.

than post on Java forumYou did mean to say "on a JavaScript forum", didn't you?

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Hi,
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af:tree
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Hi everyone,
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End With
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Dim node As TreeNode
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node.Checked = nodeChecked
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Me.CheckAllChildNodes(node, nodeChecked)
End If
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The reference for that is this MSDN document.
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I hope that helps. :)
Please call me Frank :)

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Edited by: Miguel Angel on 21/06/2012 12:53 PM

At least the call the javascript works, but this line doesn't work, anybody know why?:
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Apex Tree Node Search

Hi guys,
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So ,
1 : The method usage is right?
2 : Do you have any other idea about how can i do this search stuff.
$("#TREEID").tree("search", document.getElementById("P300_SEARCH_TEXT").value);
Database : Oracle11g
Apex version : 4.1
Thanks

Mimi gave a very good start though. I have not worked with a tree before, but those tips guided me to the documentation, and i was able to take it from there. I can't see how the documentation would be lacking for you though, i find it to be clear. However, if you don't have some experience with javascript/jquery, this will not be straightforward.
I made a new tree page, based this on EMP.
When you want to do a search, you will first need the tree object, since the search function is a function of that object. I opened Firebug and ran this in my console:
jQuery.tree.focused()This is in the docs. "This functions returns the currently focused tree instance."
If you would have more trees, you could always use
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Arguments:
mixed needle
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an actual DOM element contained within the tree, or a jQuery extended DOM node container within the tree.>
Now you have your tree object. Let's do a search. There are 2 employees with 'LL' in their names. I want to grab those.
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What is of importance here is this: The function triggers the onsearch callback
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>
So the default action of a search is something very simple: it assigns a class to the nodes which match the search criteria.
If you would want more complex things to happen, you can simply provide another function to the tree object for the onsearch callback, and that is what Mimi meant with changing it. But you don't have to if the class-adding is sufficient.
So, running from my firebug console:
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It also helps to use something like firebug, have knowledge of jquery, DOM and being able to inspect it, and read docs. I did not do anything special except applying some knowledge and taking my lead from those docs. Of course, Mimi mentioned this aswell, but the docs are at *\apex_images\libraries\jquery-jstree\0.9.9a2\documentation.html*
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How to resize a custom tree node like you would a JFrame window?

Hello,
I am trying to resize a custom tree node like you would a JFrame window.
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import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.util.EventObject;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
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import javax.swing.tree.DefaultMutableTreeNode;
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import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
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TreeBasic panel;
DefaultMutableTreeNode currentNode;
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the node on the tree is only painted on using the
renderer to do the painting work. A mouse listener
has to be added to the tree, and when moved over an
area, you have to determine if you are over the
border and which direction to update the cursor and
to know which way to resize when dragged. One of the
BasicRootPaneUI has some code that can help determine
that.Thanks for replying. What is your opinion on this alternative idea that I just had?
I am wondering if it might be easier to have a toggle button in the node that you click when you want to resize the node. Then a mouse-down and dragging the mouse will resize the node. Mouse-up will reset the toggle button, and so will mouse down in an invalid area.
Anil

Tree item when-tree-node-selected fires differently from 6i to 10g.

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Oleg,
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--pat

Useful Code of the Day: Hideable Tree Nodes

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import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
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     * @param parent the parent node
     * @return the child count
     public int getChildCount(Object parent) {
          int count = 0;
          if(parent instanceof TreeNode) {
               TreeNode p = (TreeNode)parent;
               for(int i = 0; i < p.getChildCount(); i++) {
                    TreeNode pc = (TreeNode)p.getChildAt(i);
                    if(isNodeVisible(pc)) {
                         count++;
          return count;
     * Returns the index of child in parent.
     * @param parent the parent node
     * @param child the child node
     * @return the index of the child node in the parent
     public int getIndexOfChild(Object parent, Object child) {
          int index = -1;
          if(parent instanceof TreeNode && child instanceof TreeNode) {
               TreeNode p = (TreeNode)parent;
               TreeNode c = (TreeNode)child;
               if(isNodeVisible(c)) {
                    index = 0;
                    for(int i = 0; i < p.getChildCount(); i++) {
                         TreeNode pc = (TreeNode)p.getChildAt(i);
                         if(pc.equals(c)) {
                              return index;
                         if(isNodeVisible(pc)) {
                              index++;
          return index;
     * Main method for testing.
     * @param args the command-line arguments
     public static void main(String[] args) {
          JFrame f = new JFrame();
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          HideableMutableTreeNode root = new HideableMutableTreeNode("root");
          root.add(new HideableMutableTreeNode("child_1"));
          final HideableMutableTreeNode c2 = new HideableMutableTreeNode("child_2");
          c2.setVisible(false);
          final HideableMutableTreeNode c2a = new HideableMutableTreeNode("child_2_A");
          c2.add(c2a);
          c2.add(new HideableMutableTreeNode("child_2_B"));
          root.add(c2);
          HideableMutableTreeNode c3 = new HideableMutableTreeNode("child_3");
          HideableMutableTreeNode cC = new HideableMutableTreeNode("child_3_C");
          cC.setVisible(false);
          c3.add(cC);
          c3.add(new HideableMutableTreeNode("child_3_D"));
          root.add(c3);
          root.add(new HideableMutableTreeNode("child_4"));
          root.add(new HideableMutableTreeNode("child_5"));
          DefaultMutableTreeNode c6 = new DefaultMutableTreeNode("child_6");
          c6.add(new DefaultMutableTreeNode("child_6_A"));
          c6.add(new DefaultMutableTreeNode("child_6_B"));
          root.add(c6);
          final HideableTreeModel model = new HideableTreeModel(root);
          JTree tree = new JTree(model);
          f.getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);
          JButton b = new JButton("toggle");
          b.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    model.setNodeVisible(c2, !model.isNodeVisible(c2));
                    //model.ensurePathToNodeVisible(c2a);
          f.getContentPane().add(b, BorderLayout.SOUTH);
          f.pack();
          f.setSize(300, 500);
          f.show();
// *** HideableMutableTreeNode ***
import javax.swing.*;
import javax.swing.tree.*;
* <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
* implementation that works with <code>HideableTreeModel</code>.
public class HideableMutableTreeNode extends DefaultMutableTreeNode {
     * The node is visible flag.
     public boolean visible = true;
     * Creates a tree node that has no parent and no children, but which
     * allows children.
     public HideableMutableTreeNode() {
          super();
     * Creates a tree node with no parent, no children, but which allows
     * children, and initializes it with the specified user object.
     * @param userObject - an Object provided by the user that
     * constitutes the node's data
     public HideableMutableTreeNode(Object userObject) {
          super(userObject);
     * Creates a tree node with no parent, no children, initialized with the
     * specified user object, and that allows children only if specified.
     * @param userObject - an Object provided by the user that
     * constitutes the node's data
     * @param allowsChildren - if true, the node is allowed to have child
     * nodes -- otherwise, it is always a leaf node
     public HideableMutableTreeNode(Object userObject, boolean allowsChildren) {
          super(userObject, allowsChildren);
     * Checks if the node is visible.
     * @return true if the node is visible, else false
     public boolean isVisible() {
          return this.visible;
     * Sets if the node is visible.
     * @param v true if the node is visible, else false
     public void setVisible(boolean v) {
          this.visible = v;
// *** TreeNodeTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>TreeNodeTreeModel</code> is an <code>AbstractTreeModel</code>
* implementation for <code>javax.swing.tree.TreeNode</code> objects.
public class TreeNodeTreeModel extends AbstractTreeModel {
     * Creates a new <code>TreeNodeTreeModel</code> object.
     * @param root the root node
     public TreeNodeTreeModel(TreeNode root) {
          super();
          setRoot(root);
     * Returns the parent of the child node.
     * @param node the child node
     * @return the parent or null if root
     public Object getParent(Object node) {
          if(node != getRoot() && (node instanceof TreeNode)) {
               return ((TreeNode)node).getParent();
          return null;
     * Returns the child of parent at index index in the parent's child array.
     * @param parent the parent node
     * @param index the index
     * @return the child or null if no children
     public Object getChild(Object parent, int index) {
          if(parent instanceof TreeNode) {
               return ((TreeNode)parent).getChildAt(index);
          return null;
     * Returns the number of children of parent.
     * @param parent the parent node
     * @return the child count
     public int getChildCount(Object parent) {
          if(parent instanceof TreeNode) {
               return ((TreeNode)parent).getChildCount();
          return 0;
     * Returns the index of child in parent.
     * @param parent the parent node
     * @param child the child node
     * @return the index of the child node in the parent
     public int getIndexOfChild(Object parent, Object child) {
          if(parent instanceof TreeNode && child instanceof TreeNode) {
               return ((TreeNode)parent).getIndex((TreeNode)child);
          return -1;
     * Returns true if node is a leaf.
     * @param node the node
     * @return true if the node is a leaf
     public boolean isLeaf(Object node) {
          if(node instanceof TreeNode) {
               return ((TreeNode)node).isLeaf();
          return true;
     * Main method for testing.
     * @param args the command-line arguments
     public static void main(String[] args) {
          JFrame f = new JFrame();
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
          root.add(new DefaultMutableTreeNode("child_1"));
          DefaultMutableTreeNode c2 = new DefaultMutableTreeNode("child_2");
          c2.add(new DefaultMutableTreeNode("child_2_A"));
          c2.add(new DefaultMutableTreeNode("child_2_B"));
          root.add(c2);
          root.add(new DefaultMutableTreeNode("child_3"));
          root.add(new DefaultMutableTreeNode("child_4"));
          JTree tree = new JTree(new TreeNodeTreeModel(root));
          f.getContentPane().add(new JScrollPane(tree));
          f.pack();
          f.setSize(300, 500);
          f.show();
// *** AbstractTreeModel ***
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public abstract class AbstractTreeModel implements TreeModel {
     * The list of tree model listeners.
     private Vector modelListeners = new Vector();
     * The root object of the tree.
     private Object root = null;
     * Basic no-op constructor.
     public AbstractTreeModel() {
     * Gets the root object of the tree.
     * @return the root object
     public Object getRoot() {
          return this.root;
     * Sets the root object of the tree.
     * @param r the root object
     protected void setRoot(Object r) {
          this.root = r;
     * Gets the path to the root node for the specified object.
     * @param node the root node
     * @return the path to the object or <CODE>null</CODE>
     public Object[] getPathToRoot(Object node) {
          return getPathToRoot(node, 0);
     * Gets the path to the root node for the specified object.
     * @param node the root node
     * @param i the current index
     * @return the path to the object or <CODE>null</CODE>
     private Object[] getPathToRoot(Object node, int i) {
          Object anode[];
          if(node == null) {
               if(i == 0) {
                    return null;
               anode = new Object[i];
          } else {
               i++;
               if(node == getRoot()) {
                    anode = new Object[i];
               } else {
                    anode = getPathToRoot(getParent(node), i);
               anode[anode.length - i] = node;
          return anode;
     * Gets the parent object of the specified object. This method is not
     * part of the <code>javax.swing.tree.TreeModel</code> interface, but is
     * required to support the <code>getPathToRoot(Object)</code> method,
     * which is widely used in this class. Therefore, it is important to
     * correctly implement this method.
     * @param obj the object
     * @parma the parent object or null if no parent or invalid object
     protected abstract Object getParent(Object obj);
     * Adds a listener for the <CODE>TreeModelEvent</CODE> posted after the
     * tree changes.
     * @param l the tree model listener
     public void addTreeModelListener(TreeModelListener l) {
          modelListeners.addElement(l);
     * Removes a listener previously added with addTreeModelListener().
     * @param l the tree model listener
     public void removeTreeModelListener(TreeModelListener l) {
          modelListeners.removeElement(l);
     * Forces the tree to reload. This is useful when many changes occur
     * under the root node in the tree structure.
     * <b>NOTE:</b> This will cause the tree to be collapsed. To maintain
     * the expanded nodes, see the <code>getExpandedPaths(JTree)</code>
     * and <code>expandPaths(JTree, ArrayList)</code> methods.
     * @see #getExpandedPaths(JTree)
     * @see #expandPaths(JTree, ArrayList)
     public void reload() {
          reload(getRoot());
     * Forces the tree to repaint. This is useful when many changes occur
     * under a specific node in the tree structure.
     * <b>NOTE:</b> This will cause the tree to be collapsed below the
     * updated node.
     * @param node the node that changed
     public void reload(Object node) {
          if(node != null) {
               TreePath tp = new TreePath(getPathToRoot(node));
               fireTreeStructureChanged(new TreeModelEvent(this, tp));
     * Messaged when the user has altered the value for the item identified
     * by <CODE>path</CODE> to <CODE>newValue</CODE>.
     * @param path the path to the changed object
     * @param newValue the new value
     public void valueForPathChanged(TreePath path, Object newValue) {
          nodeChanged(path.getLastPathComponent());
     * Notifies the tree that nodes were inserted. The index is looked up
     * automatically.
     * @param node the parent node
     * @param child the inserted child node
     public void nodeInserted(Object node, Object child) {
          nodeInserted(node, child, -1);
     * Notifies the tree that nodes were inserted.
     * @param node the parent node
     * @param child the inserted child node
     * @param index the index of the child
     public void nodeInserted(Object node, Object child, int index) {
          if(index < 0) {
               index = getIndexOfChild(node, child);
          if(node != null && child != null && index >= 0) {
               TreePath tp = new TreePath(getPathToRoot(node));
               int[] ai = { index };
               Object[] ac = { child };
               fireTreeNodesInserted(new TreeModelEvent(this, tp, ai, ac));
     * Notifies the tree that nodes were removed. The index is required
     * since by this point, the object will no longer be in the tree.
     * @param node the parent node
     * @param child the removed child node
     * @param index the index of the child
     public void nodeRemoved(Object node, Object child, int index) {
          if(node != null && child != null && index >= 0) {
               TreePath tp = new TreePath(getPathToRoot(node));
               int[] ai = { index };
               Object[] ac = { child };
               fireTreeNodesRemoved(new TreeModelEvent(this, tp, ai, ac));
     * Notifies the tree that a node was changed.
     * @param node the changed node
     public void nodeChanged(Object node) {
          if(node != null) {
               TreePath tp = new TreePath(getPathToRoot(node));
               fireTreeNodesChanged(new TreeModelEvent(this, tp, null, null));
     * Fires "tree nodes changed" events to all listeners.
     * @param event the tree model event
     protected void fireTreeNodesChanged(TreeModelEvent event) {
          for(int i = 0; i < modelListeners.size(); i++) {
               ((TreeModelListener)modelListeners.elementAt(i)).treeNodesChanged(event);
     * Fires "tree nodes inserted" events to all listeners.
     * @param event the tree model event
     protected void fireTreeNodesInserted(TreeModelEvent event) {
          for(int i = 0; i < modelListeners.size(); i++) {
               ((TreeModelListener)modelListeners.elementAt(i)).treeNodesInserted(event);
     * Fires "tree nodes removed" events to all listeners.
     * @param event the tree model event
     protected void fireTreeNodesRemoved(TreeModelEvent event) {
          for(int i = 0; i < modelListeners.size(); i++) {
               ((TreeModelListener)modelListeners.elementAt(i)).treeNodesRemoved(event);
     * Fires "tree structure changed" events to all listeners.
     * @param event the tree model event
     protected void fireTreeStructureChanged(TreeModelEvent event) {
          for(int i = 0; i < modelListeners.size(); i++) {
               ((TreeModelListener)modelListeners.elementAt(i)).treeStructureChanged(event);
     * Records the list of currently expanded paths in the specified tree.
     * This method is meant to be called before calling the
     * <code>reload()</code> methods to allow the tree to store the paths.
     * @param tree the tree
     * @param pathlist the list of expanded paths
     public ArrayList getExpandedPaths(JTree tree) {
          ArrayList expandedPaths = new ArrayList();
          addExpandedPaths(tree, tree.getPathForRow(0), expandedPaths);
          return expandedPaths;
     * Adds the expanded descendants of the specifed path in the specified
     * tree to the internal expanded list.
     * @param tree the tree
     * @param path the path
     * @param pathlist the list of expanded paths
     private void addExpandedPaths(JTree tree, TreePath path, ArrayList pathlist) {
          Enumeration enum = tree.getExpandedDescendants(path);
          while(enum.hasMoreElements()) {
               TreePath tp = (TreePath)enum.nextElement();
               pathlist.add(tp);
               addExpandedPaths(tree, tp, pathlist);
     * Re-expands the expanded paths in the specified tree. This method is
     * meant to be called before calling the <code>reload()</code> methods
     * to allow the tree to store the paths.
     * @param tree the tree
     * @param pathlist the list of expanded paths
     public void expandPaths(JTree tree, ArrayList pathlist) {
          for(int i = 0; i < pathlist.size(); i++) {
               tree.expandPath((TreePath)pathlist.get(i));

Hey
I'm not trying to show anyone up here, but having just built a tree model for displaying an XML document in a tree, I thought this seemed like a neat exercise.
I implemented this very differently from the @OP. I only have one class, HiddenNodeTreeModel. All the hidden node data is stored in the model itself in my class. The advantage of what I've created is it will work with any TreeModel. The disadvantage is that I think it's not going to be very scalable - the additional computing to get the number of child nodes and to adjust indexes is heavy. So if you need a scalable solution definitely don't use this.
Anyway here you go
HiddenNodeTreeModel.java
======================
package tjacobs.ui.tree;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import tjacobs.ui.WindowUtilities;
public class HiddenNodeTreeModel implements TreeModel {
     TreeModel mModel;
     ArrayList<Object> mHidden = new ArrayList<Object>();
     public HiddenNodeTreeModel (TreeModel model) {
          mModel = model;
     public void addTreeModelListener(TreeModelListener arg0) {
          mModel.addTreeModelListener(arg0);
     private ArrayList<Integer> getHiddenChildren(Object parent) {
          ArrayList<Integer> spots = new ArrayList<Integer>();
          Iterator _i = mHidden.iterator();
          while (_i.hasNext()) {
               Object hidden = _i.next();
               int idx = mModel.getIndexOfChild(parent, hidden);
               if (idx != -1) {
                    spots.add(idx);
          return spots;
     public Object getChild(Object arg0, int index) {
          ArrayList<Integer> spots = getHiddenChildren(arg0);
          Collections.sort(spots);
          Iterator<Integer> _i = spots.iterator();
          while (_i.hasNext()) {
               int num = _i.next();
               if (num <= index) {
                    index++;
          return mModel.getChild(arg0, index);
     public int getChildCount(Object arg0) {
          ArrayList list = getHiddenChildren(arg0);
          System.out.println("size = " + list.size());
          return mModel.getChildCount(arg0) - list.size();
     public int getIndexOfChild(Object arg0, Object arg1) {
          int index = mModel.getIndexOfChild(arg0, arg1);
          ArrayList<Integer> spots = getHiddenChildren(arg0);
          Collections.sort(spots);
          Iterator<Integer> _i = spots.iterator();
          int toSub = 0;
          while (_i.hasNext()) {
               int num = _i.next();
               if (num <= index) {
                    toSub++;
          return index - toSub;
     public Object getRoot() {
          // TODO Auto-generated method stub
          return mModel.getRoot();
     public boolean isLeaf(Object arg0) {
          // TODO Auto-generated method stub
          return mModel.isLeaf(arg0);
     public void removeTreeModelListener(TreeModelListener arg0) {
          mModel.removeTreeModelListener(arg0);
     public void valueForPathChanged(TreePath arg0, Object arg1) {
          mModel.valueForPathChanged(arg0, arg1);
     public void hideNode(Object node) {
          if (node instanceof TreePath) {
               node = ((TreePath)node).getLastPathComponent();
          mHidden.add(node);
     public void showNode(Object node) {
          mHidden.remove(node);
     public void showAll() {
          mHidden.clear();
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
          DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
          DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
          DefaultMutableTreeNode D = new DefaultMutableTreeNode("D");
          DefaultMutableTreeNode E = new DefaultMutableTreeNode("E");
          DefaultMutableTreeNode F = new DefaultMutableTreeNode("F");
          A.add(B);
          B.add(C);
          B.add(D);
          B.add(E);
          E.add(F);
          DefaultTreeModel model = new DefaultTreeModel(A);
          final HiddenNodeTreeModel hmodel = new HiddenNodeTreeModel(model);
          final JTree tree = new JTree(hmodel);
          JFrame jf = new JFrame("HiddenNodeTreeModel Test");
          jf.add(tree);
          JMenuBar bar = new JMenuBar();
          jf.setJMenuBar(bar);
          JMenu menu = new JMenu("Options");
          bar.add(menu);
          final JMenuItem hide = new JMenuItem("Hide");
          final JMenuItem show = new JMenuItem("ShowAll");
          menu.add(hide);
          menu.add(show);
          ActionListener al = new ActionListener() {
               public void actionPerformed(ActionEvent ae) {
                    if (ae.getSource() == hide) {
                         hmodel.hideNode(tree.getSelectionPath());
                         tree.updateUI();
                    else {
                         hmodel.showAll();
                         tree.updateUI();
          hide.addActionListener(al);
          show.addActionListener(al);
          jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          jf.setBounds(100,100,100,100);
          jf.setVisible(true);
}

How to get a Tree Node Value when a Tree is Expanded

My reqiurement is when i Expand a Tree i need the Expanded tree Node Value. For Example Consider Parent as a Root Node of a Tree, and Consider its two Children Child1 and Child2.
When + Parent Expanded
I will Get the Output as --Parent
- Child1
- Child2
so As when i expand the Tree i must Get the String Value Parent.

duplicate
How to get a Tree Node Value when a Tree is Expanded

Problems in creating a preorder tree node arraylist

Hi, i want to create an arraylist containing a preorder tree node's name, the program compiled well but every time it gives error when i press the "Output Preorder" button to create the arraylist, the following is the code, can someone help? Thanks a lot!!
                JButton outputPreorderButton = new JButton("Output Preorder");
outputPreorderButton.addActionListener(new ActionListener()
     public void actionPerformed(ActionEvent e)
        for (Enumeration evev = tableTreeRootNode.preorderEnumeration() ; evev.hasMoreElements() ;) {
               System.out.println(evev.nextElement());
               String s = (String)evev.nextElement();
               tableTreeNodesArray.add(s);

Yeah, well, it will "give error" (as you so precisely and informatively say) if there's an odd number of nodes in your tree. Consider your code:System.out.println(evev.nextElement());
// Get element number 1 and print it.
String s = (String)evev.nextElement();
tableTreeNodesArray.add(s);
// Get element number 2 and add it to the list.So, the odd-numbered elements you print. The even-numbered elements you add to the list. If it happens there are 31 nodes, then an error will occur when you try to get node 32.

Creation of a Popup Menu for a Tree Node

Hi Ppl,
I need to create a Pop-up Menu for a tree node in WebDynpro Application, please give me a "How to .." sort of material or a link which would have same sort of information...
Also, My requirement is to call the pop-up on the right click of mouse on the tree node, please let me know on which event handler I can call it ? Do I require a custom event handler for it ?
Thanks in advance
Anish

Hi Anish,
You simply add a Tree UI element, and then right-click the tree UI element and insert a TreeNode element.
To the TreeNode element you can add a menu, and then to this menu you can add menu items. When the user right click the tree node, the menu item is displayed. If the user clicks the menu item, the action for the menuitem is run.
Hope that helps.
Daniel

Read Selected Tree Node value. Jdeveloper Jdeveloper 11.1.2.1.0 11.1.2.1.0

Version: Jdeveloper 11.1.2.1.0
how to get programmatically tree node value.
i have tried but cann't read value from selected node.
please help me.
here is my application creation steps:
1. New Application
2. Fusion Web Application (ADF) Template
3. Create View Object VOTreeMst
Query:
     Select Department_Name,Department_Id
     From Departments
4. Create View Object VOTreeChd
Query:
     Select Last_Name,Employee_Id,Department_Id
     From Employees
5. Create View Link VLTreeMstChd
     VOTreeMst.DepartmentId=VOTreeChd.DepartmentId
     And Add to Application Module
6. Create page page1 in ViewController
     New-->Web Tier-->JSF/Facelets-->Page
     Selected Document Type JSP XML
7. Drag VOTreeMst1 From Data Controls into page1
and select Tree-->ADF Tree
8. ADD java Code into selection Listener
public void nodeSelect(SelectionEvent selectionEvent) {
//original selection listener set by ADF
String adfSelectionListener = "#{bindings.VOTreeMst1.treeModel.makeCurrent}";
//make sure the default selection listener functionality is preserved.
//you don't need to do this for multi select trees as the ADF binding
//only supports single current row selection
/* START PRESERVER DEFAULT ADF SELECT BEHAVIOR */
FacesContext fctx = FacesContext.getCurrentInstance();
Application application = fctx.getApplication();
ELContext elCtx = fctx.getELContext();
ExpressionFactory exprFactory = application.getExpressionFactory();
MethodExpression me = null;
me = exprFactory.createMethodExpression(elCtx, adfSelectionListener, Object.class,
new Class[] { SelectionEvent.class });
me.invoke(elCtx, new Object[] { selectionEvent });
/* END PRESERVER DEFAULT ADF SELECT BEHAVIOR */
RichTree tree = (RichTree)selectionEvent.getSource();
TreeModel model = (TreeModel)tree.getValue();
//get selected nodes
RowKeySet rowKeySet = selectionEvent.getAddedSet();
Iterator rksIterator = rowKeySet.iterator();
//for single select configurations, thi sonly is called once
while (rksIterator.hasNext()) {
List key = (List)rksIterator.next();
JUCtrlHierBinding treeBinding = null;
CollectionModel collectionModel = (CollectionModel)tree.getValue();
treeBinding = (JUCtrlHierBinding)collectionModel.getWrappedData();
JUCtrlHierNodeBinding nodeBinding = treeBinding.findNodeByKeyPath(key);
Row rw = nodeBinding.getRow();
//print first row attribute. Note that in a tree you have to determine the node
//type if you want to select node attributes by name and not index
String rowType = rw.getStructureDef().getDefName();
if(rowType.equalsIgnoreCase("VOTreeMst")){
System.out.println("This row is a department: " + rw.getAttribute("DepartmentId"));
else if(rowType.equalsIgnoreCase("VOTreeChd")){
System.out.println("This row is an employee: " + rw.getAttribute("EmployeeId"));
else{
System.out.println("Huh ????");
// ... do more usefuls stuff here
9. when i click on first node it is working but i click on second node it is not working
error message::
<LifecycleImpl> <_handleException> ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase INVOKE_APPLICATION 5
javax.el.ELException: java.lang.NullPointerException
     at com.sun.el.parser.AstValue.invoke(Unknown Source)
     at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodExpression(UIXComponentBase.java:1589)
     at org.apache.myfaces.trinidad.component.UIXTree.broadcast(UIXTree.java:237)
<RegistrationConfigurator> <handleError> ADF_FACES-60096:Server Exception during PPR, #1
javax.el.ELException: java.lang.NullPointerException
I have also tried using following code but same problem
public void onTreeSelect(SelectionEvent selectionEvent) {
//original selection listener set by ADF
String adfSelectionListener = "#{bindings.VOTreeMst1.treeModel.makeCurrent}";
//make sure the default selection listener functionality is preserved.
//you don't need to do this for multi select trees as the ADF binding
//only supports single current row selection
/* START PRESERVER DEFAULT ADF SELECT BEHAVIOR */
FacesContext fctx = FacesContext.getCurrentInstance();
Application application = fctx.getApplication();
ELContext elCtx = fctx.getELContext();
ExpressionFactory exprFactory = application.getExpressionFactory();
MethodExpression me = null;
me = exprFactory.createMethodExpression(elCtx, adfSelectionListener, Object.class,
new Class[] { SelectionEvent.class });
me.invoke(elCtx, new Object[] { selectionEvent });
/* END PRESERVER DEFAULT ADF SELECT BEHAVIOR */
RichTree tree = (RichTree)selectionEvent.getSource();
TreeModel model = (TreeModel)tree.getValue();
//get selected nodes
RowKeySet rowKeySet = selectionEvent.getAddedSet();
Iterator rksIterator = rowKeySet.iterator();
//for single select configurations, thi sonly is called once
while (rksIterator.hasNext()) {
List key = (List)rksIterator.next();
JUCtrlHierBinding treeBinding = null;
treeBinding = (JUCtrlHierBinding)((CollectionModel)tree.getValue()).getWrappedData();
JUCtrlHierNodeBinding nodeBinding = treeBinding.findNodeByKeyPath(key);
Row rw = nodeBinding.getRow();
//print first row attribute. Note that in a tree you have to determine the node
//type if you want to select node attributes by name and not index
System.out.println("row: " + rw.getAttribute(0));
But
If i create .jspx page From
Web Tier->Jsp->page Then it is working fine
when i create .jspx page From
Web Tier->JSF\Facelets->page Then it is not working
i need to get value from "Web Tier->JSF\Facelets->page"
is there any help please?

You should try Franks generic selectionListener http://www.oracle.com/technetwork/developer-tools/adf/learnmore/25-generic-tree-selection-listener-169164.pdf. For help on hoe to get the selected tree node data check http://www.oracle.com/technetwork/developer-tools/adf/learnmore/26-get-selected-tree-node-data-169165.pdf
Timo

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