--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/swing/tree/NotifyingTreeNode.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,195 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
+ */
+
+package com.oracle.solaris.vp.util.swing.tree;
+
+import java.util.*;
+import javax.swing.event.*;
+import javax.swing.tree.*;
+import com.oracle.solaris.vp.util.swing.event.TreeModelListeners;
+
+/**
+ * The {@code NotifyingTreeNode} class propagates insertions/deletions to the
+ * {@code TreeNode} to registered listeners.  The {@code NotifyingTreeNode} adds
+ * itself as a {@code TreeModelListener} to each of its children.
+ */
+@SuppressWarnings({"serial"})
+public class NotifyingTreeNode<U> extends TypedTreeNode<U>
+    implements TreeModelListener {
+
+    //
+    // Instance data
+    //
+
+    private TreeModelListeners listeners = new TreeModelListeners();
+
+    //
+    // Constructors
+    //
+
+    public NotifyingTreeNode() {
+    }
+
+    public NotifyingTreeNode(Object userObject) {
+	super(userObject);
+    }
+
+    public NotifyingTreeNode(Object userObject, boolean allowsChildren) {
+	super(userObject, allowsChildren);
+    }
+
+    //
+    // TreeModelListener methods
+    //
+
+    /**
+     * Propagates the given event to registered listeners.
+     */
+    @Override
+    public void treeNodesChanged(TreeModelEvent e) {
+	listeners.treeNodesChanged(e);
+    }
+
+    /**
+     * Propagates the given event to registered listeners.
+     */
+    @Override
+    public void treeNodesInserted(TreeModelEvent e) {
+	listeners.treeNodesInserted(e);
+    }
+
+    /**
+     * Propagates the given event to registered listeners.
+     */
+    @Override
+    public void treeNodesRemoved(TreeModelEvent e) {
+	listeners.treeNodesRemoved(e);
+    }
+
+    /**
+     * Propagates the given event to registered listeners.
+     */
+    @Override
+    public void treeStructureChanged(TreeModelEvent e) {
+	listeners.treeStructureChanged(e);
+    }
+
+    //
+    // DefaultMutableTreeNode methods
+    //
+
+    @Override
+    public void insert(MutableTreeNode child, int index) {
+	super.insert(child, index);
+
+	if (child instanceof TreeModelListener) {
+	    ((NotifyingTreeNode)child).addTreeModelListener(this);
+	}
+    }
+
+    @Override
+    public void remove(int index) {
+	TreeNode child = getChildAt(index);
+	if (child instanceof TreeModelListener) {
+	    ((NotifyingTreeNode)child).removeTreeModelListener(this);
+	}
+
+	super.remove(index);
+    }
+
+    //
+    // NotifyingTreeNode methods
+    //
+
+    public void addTreeModelListener(TreeModelListener listener) {
+	listeners.add(listener);
+    }
+
+    /**
+     * Called when this {@code TreeNode} has changed.
+     */
+    public void fireTreeNodeChanged() {
+	TreePath path = null;
+	int index = 0;
+
+	TreeNode parent = getParent();
+	if (parent != null) {
+	    index = parent.getIndex(this);
+	}
+
+	TreeModelEvent event = new TreeModelEvent(
+	    this, path, new int[] {index}, new TreeNode[] {this});
+
+	treeNodesChanged(event);
+    }
+
+    /**
+     * Called when child {@code TreeNode}s of this {@code TreeNode} have
+     * changed.
+     */
+    public void fireTreeNodesChanged(TreeNode[] nodes, int[] indexes) {
+	TreeModelEvent event =
+	    new TreeModelEvent(this, getTreePath(), indexes, nodes);
+
+	treeNodesChanged(event);
+    }
+
+    public void fireTreeNodesInserted(TreeNode[] nodes, int[] indexes) {
+	TreeModelEvent event =
+	    new TreeModelEvent(this, getTreePath(), indexes, nodes);
+
+	treeNodesInserted(event);
+    }
+
+    public void fireTreeNodesRemoved(TreeNode[] nodes, int[] indexes) {
+	TreeModelEvent event =
+	    new TreeModelEvent(this, getTreePath(), indexes, nodes);
+
+	treeNodesRemoved(event);
+    }
+
+    public void fireTreeStructureChanged() {
+	TreeModelEvent event = new TreeModelEvent(this, getTreePath());
+	treeStructureChanged(event);
+    }
+
+    public TreePath getTreePath() {
+	List<Object> path = new ArrayList<Object>();
+	path.add(this);
+
+	TreeNode parent = getParent();
+	while (parent != null) {
+	    path.add(0, parent);
+	    parent = parent.getParent();
+	}
+
+	Object[] array = path.toArray(new Object[path.size()]);
+	return new TreePath(array);
+    }
+
+    public void removeTreeModelListener(TreeModelListener listener) {
+	listeners.remove(listener);
+    }
+}