ash/wm/lock_state_observer.h

   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
  10 namespace ash {
  11
  12 // Interface for classes that want to be notified by LockStateController when
  13 // session-related events occur.
  14 class 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_