Animated Rotation

views/paint_listener.h

+// Copyright (c) 2011 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.
+
+#ifndef VIEWS_PAINT_LISTENER_H_
+#define VIEWS_PAINT_LISTENER_H_
+#pragma once
+
+namespace views {
+
+class View;
+
+// Paint listeners can be installed on views to allow other parties to be
+// notified when painting or compositing completes.
+class PaintListener {
+ public:
+  virtual void OnPainted(View* view) = 0;

[Ben Goodger (Google), 2011/08/26 19:30:00]

From your code, it doesn't appear that the OnPainted notification is actually
used by anyone.

+  virtual void OnComposited(View* view) = 0;

[Ben Goodger (Google), 2011/08/26 19:30:00]

Looking at what you're using this for, it seems like this could be added to the
WidgetDelegate instead, rather than adding this API overhead to View.

+
+ protected:
+  virtual ~PaintListener();
+};
+
+} // namespace views
+
+#endif // VIEWS_PAINT_LISTENER_H_