It is time.

ui/views/view_targeter_delegate.h

-// Copyright 2014 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 UI_VIEWS_VIEW_TARGETER_DELEGATE_H_
-#define UI_VIEWS_VIEW_TARGETER_DELEGATE_H_
-
-#include "base/macros.h"
-#include "ui/views/views_export.h"
-
-namespace gfx {
-class Rect;
-}
-
-namespace views {
-class View;
-
-// Defines the default behaviour for hit-testing and event-targeting against a
-// View using a rectangular region representing an event's location. Views
-// wishing to define custom hit-testing or event-targeting behaviour do so by
-// extending ViewTargeterDelegate and then installing a ViewTargeter on
-// themselves.
-class VIEWS_EXPORT ViewTargeterDelegate {
- public:
-  ViewTargeterDelegate() {}
-  virtual ~ViewTargeterDelegate() {}
-
-  // Returns true if the bounds of |target| intersects |rect|, where |rect|
-  // is in the local coodinate space of |target|. Overrides of this method by
-  // a View subclass should enforce DCHECK_EQ(this, target).
-  virtual bool DoesIntersectRect(const View* target,
-                                 const gfx::Rect& rect) const;
-
-  // If point-based targeting should be used, return the deepest visible
-  // descendant of |root| that contains the center point of |rect|.
-  // If rect-based targeting (i.e., fuzzing) should be used, return the
-  // closest visible descendant of |root| having at least kRectTargetOverlap of
-  // its area covered by |rect|. If no such descendant exists, return the
-  // deepest visible descendant of |root| that contains the center point of
-  // |rect|. See http://goo.gl/3Jp2BD for more information about rect-based
-  // targeting.
-  virtual View* TargetForRect(View* root, const gfx::Rect& rect);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ViewTargeterDelegate);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_VIEW_TARGETER_DELEGATE_H_