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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_SYSTEM_BRIGHTNESS_CONTROL_DELEGATE_H_ | |
6 #define ASH_SYSTEM_BRIGHTNESS_CONTROL_DELEGATE_H_ | |
7 | |
8 #include "base/callback.h" | |
9 | |
10 namespace ui { | |
11 class Accelerator; | |
12 } // namespace ui | |
13 | |
14 namespace ash { | |
15 | |
16 // Delegate for controlling the brightness. | |
17 class BrightnessControlDelegate { | |
18 public: | |
19 virtual ~BrightnessControlDelegate() {} | |
20 | |
21 // Handles an accelerator-driven request to decrease or increase the screen | |
22 // brightness. | |
23 virtual void HandleBrightnessDown(const ui::Accelerator& accelerator) = 0; | |
24 virtual void HandleBrightnessUp(const ui::Accelerator& accelerator) = 0; | |
25 | |
26 // Requests that the brightness be set to |percent|, in the range | |
27 // [0.0, 100.0]. |gradual| specifies whether the transition to the new | |
28 // brightness should be animated or instantaneous. | |
29 virtual void SetBrightnessPercent(double percent, bool gradual) = 0; | |
30 | |
31 // Asynchronously invokes |callback| with the current brightness, in the range | |
32 // [0.0, 100.0]. | |
33 virtual void GetBrightnessPercent( | |
34 const base::Callback<void(double)>& callback) = 0; | |
35 }; | |
36 | |
37 } // namespace ash | |
38 | |
39 #endif // ASH_SYSTEM_BRIGHTNESS_CONTROL_DELEGATE_H_ | |
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