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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_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ | |
6 #define ASH_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ | |
7 | |
8 #include "ash/common/system/tray/system_tray_item.h" | |
9 #include "base/macros.h" | |
10 #include "base/memory/weak_ptr.h" | |
11 #include "chromeos/dbus/power_manager_client.h" | |
12 | |
13 namespace ash { | |
14 namespace tray { | |
15 class BrightnessView; | |
16 } | |
17 | |
18 class ASH_EXPORT TrayBrightness | |
19 : public SystemTrayItem, | |
20 public chromeos::PowerManagerClient::Observer { | |
21 public: | |
22 explicit TrayBrightness(SystemTray* system_tray); | |
23 ~TrayBrightness() override; | |
24 | |
25 private: | |
26 friend class TrayBrightnessTest; | |
27 | |
28 // Sends a request to get the current screen brightness so |current_percent_| | |
29 // can be initialized. | |
30 void GetInitialBrightness(); | |
31 | |
32 // Updates |current_percent_| with the initial brightness requested by | |
33 // GetInitialBrightness(), if we haven't seen the brightness already in the | |
34 // meantime. | |
35 void HandleInitialBrightness(double percent); | |
36 | |
37 // Overridden from SystemTrayItem. | |
38 views::View* CreateTrayView(LoginStatus status) override; | |
39 views::View* CreateDefaultView(LoginStatus status) override; | |
40 views::View* CreateDetailedView(LoginStatus status) override; | |
41 void DestroyTrayView() override; | |
42 void DestroyDefaultView() override; | |
43 void DestroyDetailedView() override; | |
44 void UpdateAfterLoginStatusChange(LoginStatus status) override; | |
45 bool ShouldShowShelf() const override; | |
46 | |
47 // Overriden from PowerManagerClient::Observer. | |
48 void BrightnessChanged(int level, bool user_initiated) override; | |
49 | |
50 void HandleBrightnessChanged(double percent, bool user_initiated); | |
51 | |
52 tray::BrightnessView* brightness_view_; | |
53 | |
54 // Brightness level in the range [0.0, 100.0] that we've heard about most | |
55 // recently. | |
56 double current_percent_; | |
57 | |
58 // Has |current_percent_| been initialized? | |
59 bool got_current_percent_; | |
60 | |
61 base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(TrayBrightness); | |
64 }; | |
65 | |
66 } // namespace ash | |
67 | |
68 #endif // ASH_COMMON_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ | |
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