From eb9fdc21b14368b2f8c71939eb063ddcee8c28a2 Mon Sep 17 00:00:00 2001
From: Daniel Sandler <dsandler@google.com>
Date: Mon, 14 Sep 2009 13:05:43 -0400
Subject: [PATCH] Fix http://b/issue?id=2098873 (drawing glitch in SeekBar).

The underlying ProgressBar implementation doesn't know how
to correctly update the thumb graphic, so AbsSeekBar must
call invalidate() at key moments to ensure things look
correct.  This bug is one such instance: when you pick your
finger up off the seekbar, the "value" of the progressbar
appears not to change, so ProgressBar feels no compunction
to repaint. AbsSeekBar now invalidate()s on ACTION_UP and
ACTION_CANCEL to ensure that the thumb is correctly drawn.
---
 core/java/android/widget/AbsSeekBar.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/java/android/widget/AbsSeekBar.java b/core/java/android/widget/AbsSeekBar.java
index 2a0e5e5161f58..d25530b3dfd6f 100644
--- a/core/java/android/widget/AbsSeekBar.java
+++ b/core/java/android/widget/AbsSeekBar.java
@@ -301,11 +301,16 @@ public abstract class AbsSeekBar extends ProgressBar {
                 trackTouchEvent(event);
                 onStopTrackingTouch();
                 setPressed(false);
+                // ProgressBar doesn't know to repaint the thumb drawable
+                // in its inactive state when the touch stops (because the
+                // value has not apparently changed)
+                invalidate();
                 break;
                 
             case MotionEvent.ACTION_CANCEL:
                 onStopTrackingTouch();
                 setPressed(false);
+                invalidate(); // see above explanation
                 break;
         }
         return true;