chromeos: Laser tool blocks events from propagating.

ash/common/system/chromeos/palette/tools/laser_pointer_points.h

-// Copyright 2016 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 ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_TOOLS_LASER_POINTER_POINTS_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_TOOLS_LASER_POINTER_POINTS_H_
-
-#include <deque>
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "base/time/time.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace ash {
-
-// LaserPointerPoints is a helper class used for displaying the palette tool
-// laser pointer. It keeps track of the points needed to render the laser
-// pointer and its tail.
-class ASH_EXPORT LaserPointerPoints {
- public:
-  // Struct to describe each point.
-  struct LaserPoint {
-    gfx::Point location;
-    base::Time creation_time;
-  };
-
-  // Constructor with a parameter to choose the fade out time of the points in
-  // the collection.
-  explicit LaserPointerPoints(base::TimeDelta life_duration);
-  ~LaserPointerPoints();
-
-  // Adds a point. Automatically clears points that are too old.
-  void AddPoint(const gfx::Point& point);
-  // Removes all points.
-  void Clear();
-  // Gets the bounding box of the points.
-  gfx::Rect GetBoundingBox();
-  // Returns the oldest point in the collection.
-  LaserPoint GetOldest() const;
-  // Returns the newest point in the collection.
-  LaserPoint GetNewest() const;
-  // Returns the number of points in the collection.
-  int GetNumberOfPoints() const;
-  // Whether there are any points or not.
-  bool IsEmpty() const;
-  // Expose the collection so callers can work with the points.
-  const std::deque<LaserPoint>& laser_points();
-
- private:
-  friend class LaserPointerPointsTestApi;
-
-  void ClearOldPoints();
-
-  base::TimeDelta life_duration_;
-  std::deque<LaserPoint> points_;
-
-  DISALLOW_COPY_AND_ASSIGN(LaserPointerPoints);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_PALETTE_TOOLS_LASER_POINTER_POINTS_H_