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diff --git a/src/org/cyanogenmod/audiofx/seekbar/SeekBar.java b/src/org/cyanogenmod/audiofx/seekbar/SeekBar.java
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+++ b/src/org/cyanogenmod/audiofx/seekbar/SeekBar.java
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+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.cyanogenmod.audiofx.seekbar;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+
+
+/**
+ * A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch
+ * the thumb and drag left or right to set the current progress level or use the arrow keys.
+ * Placing focusable widgets to the left or right of a SeekBar is discouraged. 
+ * <p>
+ * Clients of the SeekBar can attach a {@link SeekBar.OnSeekBarChangeListener} to
+ * be notified of the user's actions.
+ *
+ * @attr ref android.R.styleable#SeekBar_thumb
+ */
+public class SeekBar extends AbsSeekBar {
+
+    /**
+     * A callback that notifies clients when the progress level has been
+     * changed. This includes changes that were initiated by the user through a
+     * touch gesture or arrow key/trackball as well as changes that were initiated
+     * programmatically.
+     */
+    public interface OnSeekBarChangeListener {
+        
+        /**
+         * Notification that the progress level has changed. Clients can use the fromUser parameter
+         * to distinguish user-initiated changes from those that occurred programmatically.
+         * 
+         * @param seekBar The SeekBar whose progress has changed
+         * @param progress The current progress level. This will be in the range 0..max where max
+         *        was set by {@link ProgressBar#setMax(int)}. (The default value for max is 100.)
+         * @param fromUser True if the progress change was initiated by the user.
+         */
+        void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser);
+    
+        /**
+         * Notification that the user has started a touch gesture. Clients may want to use this
+         * to disable advancing the seekbar. 
+         * @param seekBar The SeekBar in which the touch gesture began
+         */
+        void onStartTrackingTouch(SeekBar seekBar);
+        
+        /**
+         * Notification that the user has finished a touch gesture. Clients may want to use this
+         * to re-enable advancing the seekbar. 
+         * @param seekBar The SeekBar in which the touch gesture began
+         */
+        void onStopTrackingTouch(SeekBar seekBar);
+    }
+
+    private OnSeekBarChangeListener mOnSeekBarChangeListener;
+    
+    public SeekBar(Context context) {
+        this(context, null);
+    }
+    
+    public SeekBar(Context context, AttributeSet attrs) {
+        this(context, attrs, com.android.internal.R.attr.seekBarStyle);
+    }
+
+    public SeekBar(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    void onProgressRefresh(float scale, boolean fromUser) {
+        super.onProgressRefresh(scale, fromUser);
+
+        if (mOnSeekBarChangeListener != null) {
+            mOnSeekBarChangeListener.onProgressChanged(this, getProgress(), fromUser);
+        }
+    }
+
+    /**
+     * Sets a listener to receive notifications of changes to the SeekBar's progress level. Also
+     * provides notifications of when the user starts and stops a touch gesture within the SeekBar.
+     * 
+     * @param l The seek bar notification listener
+     * 
+     * @see SeekBar.OnSeekBarChangeListener
+     */
+    public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) {
+        mOnSeekBarChangeListener = l;
+    }
+    
+    @Override
+    void onStartTrackingTouch() {
+        super.onStartTrackingTouch();
+        if (mOnSeekBarChangeListener != null) {
+            mOnSeekBarChangeListener.onStartTrackingTouch(this);
+        }
+    }
+    
+    @Override
+    void onStopTrackingTouch() {
+        super.onStopTrackingTouch();
+        if (mOnSeekBarChangeListener != null) {
+            mOnSeekBarChangeListener.onStopTrackingTouch(this);
+        }
+    }
+    
+}