Animated Rotation

views/view.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_VIEW_H_
 #define VIEWS_VIEW_H_
 #pragma once
 
 #include <algorithm>
 #include <map>
@@ skipping 241 matching lines @@
 
   // Returns whether the view is enabled.
   virtual bool IsEnabled() const;
 
   // This indicates that the view completely fills its bounds in an opaque
   // color.
   // This doesn't affect compositing but is a hint to the compositor to optimize
   // painting.
   void SetFillsBoundsOpaquely(bool fills_bounds_opaquely);
 
+  // Used to disable painting (e.g., during an animation when expensive
+  // operations like painting can cause noticeable jank).
+  void set_painting_enabled(bool enabled) { painting_enabled_ = enabled; }
+  bool painting_enabled() const { return painting_enabled_; }
+
   // Transformations -----------------------------------------------------------
 
   // Methods for setting transformations for a view (e.g. rotation, scaling).
 
   const ui::Transform& GetTransform() const;
 
   // Clipping parameters. Clipping happens from the right and/or bottom. The
   // clipping amount is in parent's coordinate system, as in, if the view is
   // rotated, then the clipping will be applied after the rotation (and other
   // transformations, if any).
@@ skipping 1074 matching lines @@
 
   // This View's bounds in the parent coordinate system.
   gfx::Rect bounds_;
 
   // Whether this view is visible.
   bool visible_;
 
   // Whether this view is enabled.
   bool enabled_;
 
+  // Whether this view is painting.
+  bool painting_enabled_;
+
   // Whether or not RegisterViewForVisibleBoundsNotification on the RootView
   // has been invoked.
   bool registered_for_visible_bounds_notification_;
 
   // List of descendants wanting notification when their visible bounds change.
   scoped_ptr<Views> descendants_to_notify_;
 
   // Transformations -----------------------------------------------------------
 
   // Clipping parameters. skia transformation matrix does not give us clipping.
@@ skipping 74 matching lines @@
 #if defined(OS_WIN)
   scoped_refptr<NativeViewAccessibilityWin> native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_VIEW_H_