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- // Copyright 2020 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_PUBLIC_CPP_SCREEN_BACKLIGHT_OBSERVER_H_
- #define ASH_PUBLIC_CPP_SCREEN_BACKLIGHT_OBSERVER_H_
- #include "ash/public/cpp/ash_public_export.h"
- #include "ash/public/cpp/screen_backlight_type.h"
- namespace ash {
- // Used to observe backlight related events inside ash.
- class ASH_PUBLIC_EXPORT ScreenBacklightObserver {
- public:
- virtual ~ScreenBacklightObserver() = default;
- // Called when the observed BacklightsForcedOffSetter instance stops or
- // starts forcing backlights off.
- virtual void OnBacklightsForcedOffChanged(bool backlights_forced_off) {}
- // Called when the screen backlight state change is detected.
- virtual void OnScreenBacklightStateChanged(
- ScreenBacklightState screen_state) {}
- };
- } // namespace ash
- #endif // ASH_PUBLIC_CPP_SCREEN_BACKLIGHT_OBSERVER_H_
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