Sidebar mini tabs UI (views version)....

views/animation/bounds_animator.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/animation/bounds_animator.h"
 
 #include "base/scoped_ptr.h"
 #include "ui/base/animation/animation_container.h"
 #include "ui/base/animation/slide_animation.h"
 #include "views/view.h"
@@ skipping 222 matching lines @@
 void BoundsAnimator::AnimationContainerProgressed(
     AnimationContainer* container) {
   if (!repaint_bounds_.IsEmpty()) {
     // Adjust for rtl.
     repaint_bounds_.set_x(parent_->GetMirroredXWithWidthInView(
         repaint_bounds_.x(), repaint_bounds_.width()));
     parent_->SchedulePaint(repaint_bounds_, false);
     repaint_bounds_.SetRect(0, 0, 0, 0);
   }
 
-  if (observer_ && !IsAnimating()) {
-    // Notify here rather than from AnimationXXX to avoid deleting the animation
-    // while the animaion is calling us.
-    observer_->OnBoundsAnimatorDone(this);
+  if (observer_) {
+    if (IsAnimating()) {
+      observer_->OnBoundsAnimatorProgressed(this);
+    } else {
+      // Notify here rather than from AnimationXXX to avoid deleting
+      // the animation while the animaion is calling us.
+      observer_->OnBoundsAnimatorDone(this);
+    }
   }
 }
 
 void BoundsAnimator::AnimationContainerEmpty(AnimationContainer* container) {
 }
 
 }  // namespace views