--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/macosx/classes/sun/lwawt/LWScrollBarPeer.java	Tue Mar 06 20:34:38 2012 +0000
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+package sun.lwawt;
+
+import java.awt.Adjustable;
+import java.awt.Dimension;
+import java.awt.Scrollbar;
+import java.awt.event.AdjustmentEvent;
+import java.awt.event.AdjustmentListener;
+import java.awt.peer.ScrollbarPeer;
+
+import javax.swing.JScrollBar;
+
+final class LWScrollBarPeer extends LWComponentPeer<Scrollbar, JScrollBar>
+        implements ScrollbarPeer, AdjustmentListener {
+
+    //JScrollBar fires two changes with firePropertyChange (one for old value
+    // and one for new one.
+    // We save the last value and don't fire event if not changed.
+    private int currentValue;
+
+    LWScrollBarPeer(final Scrollbar target,
+                    final PlatformComponent platformComponent) {
+        super(target, platformComponent);
+    }
+
+    @Override
+    protected JScrollBar createDelegate() {
+        return new JScrollBar();
+    }
+
+    @Override
+    public void initialize() {
+        super.initialize();
+        final Scrollbar target = getTarget();
+        setValues(target.getValue(), target.getVisibleAmount(),
+                  target.getMinimum(), target.getMaximum());
+
+        final int orientation = target.getOrientation();
+        final JScrollBar delegate = getDelegate();
+        synchronized (getDelegateLock()) {
+            delegate.setOrientation(orientation == Scrollbar.HORIZONTAL
+                                    ? Adjustable.HORIZONTAL
+                                    : Adjustable.VERTICAL);
+            delegate.addAdjustmentListener(this);
+        }
+    }
+
+    @Override
+    public void setValues(final int value, final int visible, final int minimum,
+                          final int maximum) {
+        synchronized (getDelegateLock()) {
+            currentValue = value;
+            getDelegate().setValues(value, visible, minimum, maximum);
+        }
+    }
+
+    @Override
+    public void setLineIncrement(final int l) {
+        synchronized (getDelegateLock()) {
+            getDelegate().setUnitIncrement(l);
+        }
+    }
+
+    @Override
+    public void setPageIncrement(final int l) {
+        synchronized (getDelegateLock()) {
+            getDelegate().setBlockIncrement(l);
+        }
+    }
+
+    @Override
+    public Dimension getPreferredSize() {
+        synchronized (getDelegateLock()) {
+            return getDelegate().getPreferredSize();
+        }
+    }
+
+    // Peer also registered as a listener for ComponentDelegate component
+    @Override
+    public void adjustmentValueChanged(final AdjustmentEvent e) {
+        final int value = e.getValue();
+        synchronized (getDelegateLock()) {
+            if (currentValue == value) {
+                return;
+            }
+            currentValue = value;
+        }
+        getTarget().setValueIsAdjusting(e.getValueIsAdjusting());
+        getTarget().setValue(value);
+        postEvent(new AdjustmentEvent(getTarget(), e.getID(),
+                e.getAdjustmentType(), value,
+                e.getValueIsAdjusting()));
+    }
+}