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