| // 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_ |