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// Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SYSTEM_EVENT_OBSERVER_H_
#define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SYSTEM_EVENT_OBSERVER_H_
#pragma once
#include "chrome/browser/chromeos/cros/screen_lock_library.h"
#include "chrome/browser/chromeos/dbus/power_manager_client.h"
namespace chromeos {
namespace accessibility {
// A singleton class to observe system events like wake up from sleep and
// screen unlock.
class SystemEventObserver : public PowerManagerClient::Observer,
public ScreenLockLibrary::Observer {
public:
virtual ~SystemEventObserver();
// PowerManagerClient::Observer override.
virtual void SystemResumed() OVERRIDE;
// ScreenLockLibrary::Observer override.
virtual void LockScreen(ScreenLockLibrary* screen_lock_library) OVERRIDE;
// ScreenLockLibrary::Observer override.
virtual void UnlockScreen(ScreenLockLibrary* screen_lock_library) OVERRIDE;
// ScreenLockLibrary::Observer override.
virtual void UnlockScreenFailed(ScreenLockLibrary* screen_lock_library)
OVERRIDE;
// Creates the global SystemEventObserver instance.
static void Initialize();
// Returns a pointer to the global SystemEventObserver instance.
// Initialize() should already have been called.
static SystemEventObserver* GetInstance();
// Destroys the global SystemEventObserver Instance.
static void Shutdown();
private:
SystemEventObserver();
DISALLOW_COPY_AND_ASSIGN(SystemEventObserver);
};
} // namespace accessibility
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SYSTEM_EVENT_OBSERVER_H_
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