athena/input/power_button_controller.h

   1 // Copyright 2014 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 ATHENA_INPUT_POWER_BUTTON_CONTROLLER_H_
   6 #define ATHENA_INPUT_POWER_BUTTON_CONTROLLER_H_
   7
   8 #include "athena/input/public/accelerator_manager.h"
   9 #include "athena/input/public/input_manager.h"
  10 #include "base/observer_list.h"
  11 #include "base/timer/timer.h"
  12 #include "chromeos/dbus/power_manager_client.h"
  13
  14 namespace athena {
  15
  16 class PowerButtonController : public chromeos::PowerManagerClient::Observer,
  17                               public AcceleratorHandler {
  18  public:
  19   PowerButtonController();
  20   ~PowerButtonController() override;
  21
  22   void AddPowerButtonObserver(PowerButtonObserver* observer);
  23   void RemovePowerButtonObserver(PowerButtonObserver* observer);
  24
  25   void InstallAccelerators();
  26
  27   // A timer callabck to notify the long press event.
  28   int SetPowerButtonTimeoutMsForTest(int timeout);
  29
  30  private:
  31   // chromeos::PowerManagerClient::Observer:
  32   virtual void BrightnessChanged(int level, bool user_initiated) override;
  33   virtual void PowerButtonEventReceived(
  34       bool down,
  35       const base::TimeTicks& timestamp) override;
  36
  37   // AcceleratorHandler:
  38   virtual bool IsCommandEnabled(int command_id) const override;
  39   virtual bool OnAcceleratorFired(int command_id,
  40                                   const ui::Accelerator& accelerator) override;
  41
  42   void NotifyLongPress();
  43
  44   int power_button_timeout_ms_;
  45   ObserverList<PowerButtonObserver> observers_;
  46   // The last time at which the screen brightness was 0%.
  47   base::TimeTicks zero_brightness_end_time_;
  48   bool brightness_is_zero_;
  49   base::OneShotTimer<PowerButtonController> timer_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
  52 };
  53
  54 }  // namespace athena
  55
  56 #endif  // ATHENA_INPUT_POWER_BUTTON_CONTROLLER_H_