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_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ 6 #define ASH_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ 7 8 #include "ash/system/tray/system_tray_item.h" 9 #include "base/compiler_specific.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 virtual ~TrayBrightness(); 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 virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE; 39 virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE; 40 virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE; 41 virtual void DestroyTrayView() OVERRIDE; 42 virtual void DestroyDefaultView() OVERRIDE; 43 virtual void DestroyDetailedView() OVERRIDE; 44 virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE; 45 virtual bool ShouldHideArrow() const OVERRIDE; 46 virtual bool ShouldShowShelf() const OVERRIDE; 47 48 // Overriden from PowerManagerClient::Observer. 49 virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE; 50 51 void HandleBrightnessChanged(double percent, bool user_initiated); 52 53 tray::BrightnessView* brightness_view_; 54 55 // Brightness level in the range [0.0, 100.0] that we've heard about most 56 // recently. 57 double current_percent_; 58 59 // Has |current_percent_| been initialized? 60 bool got_current_percent_; 61 62 base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_; 63 64 DISALLOW_COPY_AND_ASSIGN(TrayBrightness); 65 }; 66 67 } // namespace ash 68 69 #endif // ASH_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ 70
