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 internal { 15 16 namespace tray { 17 class BrightnessView; 18 } 19 20 class TrayBrightness : public SystemTrayItem, 21 public chromeos::PowerManagerClient::Observer { 22 public: 23 explicit TrayBrightness(SystemTray* system_tray); 24 virtual ~TrayBrightness(); 25 26 private: 27 // Sends a request to get the current screen brightness so |current_percent_| 28 // can be initialized. 29 void GetInitialBrightness(); 30 31 // Updates |current_percent_| with the initial brightness requested by 32 // GetInitialBrightness(), if we haven't seen the brightness already in the 33 // meantime. 34 void HandleInitialBrightness(double percent); 35 36 // Overridden from SystemTrayItem. 37 virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE; 38 virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE; 39 virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE; 40 virtual void DestroyTrayView() OVERRIDE; 41 virtual void DestroyDefaultView() OVERRIDE; 42 virtual void DestroyDetailedView() OVERRIDE; 43 virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE; 44 virtual bool ShouldHideArrow() const OVERRIDE; 45 virtual bool ShouldShowLauncher() const OVERRIDE; 46 47 // Overriden from PowerManagerClient::Observer. 48 virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE; 49 50 void HandleBrightnessChanged(double percent, bool user_initiated); 51 52 base::WeakPtrFactory<TrayBrightness> weak_ptr_factory_; 53 54 tray::BrightnessView* brightness_view_; 55 56 // Was |brightness_view_| created for CreateDefaultView() rather than 57 // CreateDetailedView()? Used to avoid resetting |brightness_view_| 58 // inappropriately in DestroyDefaultView() or DestroyDetailedView(). 59 bool is_default_view_; 60 61 // Brightness level in the range [0.0, 100.0] that we've heard about most 62 // recently. 63 double current_percent_; 64 65 // Has |current_percent_| been initialized? 66 bool got_current_percent_; 67 68 DISALLOW_COPY_AND_ASSIGN(TrayBrightness); 69 }; 70 71 } // namespace internal 72 } // namespace ash 73 74 #endif // ASH_SYSTEM_CHROMEOS_BRIGHTNESS_TRAY_BRIGHTNESS_H_ 75