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; ~LockStateObserver()23 virtual ~LockStateObserver() {} 24 }; 25 26 } // namespace ash 27 28 #endif // ASH_WM_LOCK_STATE_OBSERVER_H_ 29