// Copyright 2017 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_LOCK_SCREEN_ACTION_LOCK_SCREEN_ACTION_BACKGROUND_OBSERVER_H_ #define ASH_LOCK_SCREEN_ACTION_LOCK_SCREEN_ACTION_BACKGROUND_OBSERVER_H_ #include "ash/ash_export.h" #include "ash/lock_screen_action/lock_screen_action_background_state.h" namespace ash { // Used to observe the state of a lock screen action background. class ASH_EXPORT LockScreenActionBackgroundObserver { public: virtual ~LockScreenActionBackgroundObserver() {} // Called when the state of the lock screen action background changes. For // example when the background starts showing (with animation), or a // background visibility animation ends. virtual void OnLockScreenActionBackgroundStateChanged( LockScreenActionBackgroundState state) = 0; }; } // namespace ash #endif // ASH_LOCK_SCREEN_ACTION_LOCK_SCREEN_ACTION_BACKGROUND_OBSERVER_H_