1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef ASH_WM_LOCK_STATE_OBSERVER_H_
6#define ASH_WM_LOCK_STATE_OBSERVER_H_
7
8#include "ash/ash_export.h"
9
10namespace ash {
11
12// Interface for classes that want to be notified by LockStateController when
13// session-related events occur.
14class ASH_EXPORT LockStateObserver {
15 public:
16  enum EventType {
17    EVENT_PRELOCK_ANIMATION_STARTED,
18    EVENT_LOCK_ANIMATION_STARTED,
19    EVENT_LOCK_ANIMATION_FINISHED,
20  };
21
22  virtual void OnLockStateEvent(EventType event) = 0;
23  virtual ~LockStateObserver() {}
24};
25
26}  // namespace ash
27
28#endif  // ASH_WM_LOCK_STATE_OBSERVER_H_
29