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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_
#define ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "chromeos/dbus/power_manager_client.h"
namespace aura {
class Window;
}
namespace views {
class Widget;
}
namespace athena {
// Shuts down in response to the power button being pressed.
class PowerButtonController : public chromeos::PowerManagerClient::Observer {
public:
explicit PowerButtonController(aura::Window* dialog_container);
virtual ~PowerButtonController();
private:
enum State {
// Releasing the power button sends a suspend request.
STATE_SUSPEND_ON_RELEASE,
// A warning that the device is about to be shutdown is visible. Releasing
// the power button does not send a suspend or a shutdown request.
STATE_SHUTDOWN_WARNING_VISIBLE,
// A D-Bus shutdown request has been sent. Shutdown cannot be canceled.
STATE_SHUTDOWN_REQUESTED,
STATE_OTHER
};
// Shows the shutdown warning dialog.
void ShowShutdownWarningDialog();
// Requests shutdown.
void Shutdown();
// chromeos::PowerManagerClient::Observer:
virtual void BrightnessChanged(int level, bool user_initiated) override;
virtual void PowerButtonEventReceived(
bool down,
const base::TimeTicks& timestamp) override;
// |shutdown_warning_message_|'s parent container.
aura::Window* warning_message_container_;
// Shows a warning that the device is about to be shutdown.
scoped_ptr<views::Widget> shutdown_warning_message_;
// Whether the screen brightness was reduced to 0%.
bool brightness_is_zero_;
// The last time at which the screen brightness was 0%.
base::TimeTicks zero_brightness_end_time_;
State state_;
base::OneShotTimer<PowerButtonController> timer_;
DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
};
} // namespace athena
#endif // ATHENA_SYSTEM_POWER_BUTTON_CONTROLLER_H_