ash/system/chromeos/power/tray_power.h

   1 // Copyright (c) 2012 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_POWER_TRAY_POWER_H_
   6 #define ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
   7
   8 #include "ash/system/chromeos/power/power_status.h"
   9 #include "ash/system/tray/system_tray_item.h"
  10
  11 class SkBitmap;
  12
  13 namespace gfx {
  14 class Image;
  15 class ImageSkia;
  16 }
  17
  18 namespace message_center {
  19 class MessageCenter;
  20 }
  21
  22 namespace ash {
  23
  24 class BatteryNotification;
  25
  26 namespace tray {
  27 class PowerTrayView;
  28 }
  29
  30 class ASH_EXPORT TrayPower : public SystemTrayItem,
  31                              public PowerStatus::Observer {
  32  public:
  33   enum NotificationState {
  34     NOTIFICATION_NONE,
  35
  36     // Low battery charge.
  37     NOTIFICATION_LOW_POWER,
  38
  39     // Critically low battery charge.
  40     NOTIFICATION_CRITICAL,
  41   };
  42
  43   // Time-based notification thresholds when on battery power.
  44   static const int kCriticalMinutes;
  45   static const int kLowPowerMinutes;
  46   static const int kNoWarningMinutes;
  47
  48   // Percentage-based notification thresholds when using a low-power charger.
  49   static const int kCriticalPercentage;
  50   static const int kLowPowerPercentage;
  51   static const int kNoWarningPercentage;
  52
  53   TrayPower(SystemTray* system_tray,
  54             message_center::MessageCenter* message_center);
  55   ~TrayPower() override;
  56
  57  private:
  58   friend class TrayPowerTest;
  59
  60   // This enum is used for histogram. The existing values should not be removed,
  61   // and the new values should be added just before CHARGER_TYPE_COUNT.
  62   enum ChargerType{
  63     UNKNOWN_CHARGER,
  64     MAINS_CHARGER,
  65     USB_CHARGER,
  66     UNCONFIRMED_SPRING_CHARGER,
  67     SAFE_SPRING_CHARGER,
  68     CHARGER_TYPE_COUNT,
  69   };
  70
  71   // Overridden from SystemTrayItem.
  72   views::View* CreateTrayView(user::LoginStatus status) override;
  73   views::View* CreateDefaultView(user::LoginStatus status) override;
  74   void DestroyTrayView() override;
  75   void DestroyDefaultView() override;
  76   void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
  77   void UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) override;
  78
  79   // Overridden from PowerStatus::Observer.
  80   void OnPowerStatusChanged() override;
  81
  82   // Show a notification that a low-power USB charger has been connected.
  83   // Returns true if a notification was shown or explicitly hidden.
  84   bool MaybeShowUsbChargerNotification();
  85
  86   // Sets |notification_state_|. Returns true if a notification should be shown.
  87   bool UpdateNotificationState();
  88   bool UpdateNotificationStateForRemainingTime();
  89   bool UpdateNotificationStateForRemainingPercentage();
  90
  91   message_center::MessageCenter* message_center_;  // Not owned.
  92   tray::PowerTrayView* power_tray_;
  93   scoped_ptr<BatteryNotification> battery_notification_;
  94   NotificationState notification_state_;
  95
  96   // Was a USB charger connected the last time OnPowerStatusChanged() was
  97   // called?
  98   bool usb_charger_was_connected_;
  99
 100   // Was line power connected the last time onPowerStatusChanged() was called?
 101   bool line_power_was_connected_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(TrayPower);
 104 };
 105
 106 }  // namespace ash
 107
 108 #endif  // ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_