--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/swing/ListSelectionUnifier.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,91 @@
+/*
+ * 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;
+
+import java.util.*;
+import com.oracle.solaris.vp.util.swing.event.*;
+
+/**
+ * The {@code ListSelectionHandler} class unifies the selection of multiple
+ * {@code ExtListSelectionModel}s, making them appear to operate as a
+ * single list.
+ * <p>
+ * When a selection is set in any model, the selections in all other models are
+ * cleared.  Adding to or removing from the selection in any model has no effect
+ * on the other models.
+ */
+public class ListSelectionUnifier implements ExtListSelectionListener {
+    //
+    // Instance data
+    //
+
+    private List<ExtListSelectionModel> models =
+	new ArrayList<ExtListSelectionModel>();
+
+    //
+    // ExtListSelectionListener methods
+    //
+
+    @Override
+    public void selectionChanged(ExtListSelectionEvent e) {
+	if (e.getType() == ExtListSelectionEvent.Type.SET) {
+	    synchronized (models) {
+		ExtListSelectionModel source = e.getSource();
+		for (ExtListSelectionModel model : models) {
+		    if (model != source) {
+			model.clearSelection();
+		    }
+		}
+	    }
+	}
+    }
+
+    //
+    // ListSelectionHandler methods
+    //
+
+    public void addModel(ExtListSelectionModel model) {
+	synchronized (models) {
+	    model.addExtListSelectionListener(this);
+	    models.add(model);
+	}
+    }
+
+    public void clearSelection() {
+	synchronized (models) {
+	    for (ExtListSelectionModel model : models) {
+		model.clearSelection();
+	    }
+	}
+    }
+
+    public void removeModel(ExtListSelectionModel model) {
+	synchronized (models) {
+	    models.remove(model);
+	    model.removeExtListSelectionListener(this);
+	}
+    }
+}