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_SYSTEM_POWER_BUTTON_CONTROLLER_H_ 6 #define ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 #include "base/time/time.h" 10 #include "base/timer/timer.h" 11 #include "chromeos/dbus/power_manager_client.h" 12 13 namespace aura { 14 class Window; 15 } 16 17 namespace views { 18 class Widget; 19 } 20 21 namespace athena { 22 23 // Shuts down in response to the power button being pressed. 24 class PowerButtonController : public chromeos::PowerManagerClient::Observer { 25 public: 26 explicit PowerButtonController(aura::Window* dialog_container); 27 virtual ~PowerButtonController(); 28 29 private: 30 enum State { 31 // Releasing the power button sends a suspend request. 32 STATE_SUSPEND_ON_RELEASE, 33 34 // A warning that the device is about to be shutdown is visible. Releasing 35 // the power button does not send a suspend or a shutdown request. 36 STATE_SHUTDOWN_WARNING_VISIBLE, 37 38 // A D-Bus shutdown request has been sent. Shutdown cannot be canceled. 39 STATE_SHUTDOWN_REQUESTED, 40 41 STATE_OTHER 42 }; 43 44 // Shows the shutdown warning dialog. 45 void ShowShutdownWarningDialog(); 46 47 // Requests shutdown. 48 void Shutdown(); 49 50 // chromeos::PowerManagerClient::Observer: 51 virtual void BrightnessChanged(int level, bool user_initiated) OVERRIDE; 52 virtual void PowerButtonEventReceived( 53 bool down, 54 const base::TimeTicks& timestamp) OVERRIDE; 55 56 // |shutdown_warning_message_|'s parent container. 57 aura::Window* warning_message_container_; 58 59 // Shows a warning that the device is about to be shutdown. 60 scoped_ptr<views::Widget> shutdown_warning_message_; 61 62 // Whether the screen brightness was reduced to 0%. 63 bool brightness_is_zero_; 64 65 // The last time at which the screen brightness was 0%. 66 base::TimeTicks zero_brightness_end_time_; 67 68 State state_; 69 70 base::OneShotTimer<PowerButtonController> timer_; 71 72 DISALLOW_COPY_AND_ASSIGN(PowerButtonController); 73 }; 74 75 } // namespace athena 76 77 #endif // ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_ 78