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// Copyright (c) 2012 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_SYSTEM_POINTER_DEVICE_OBSERVER_H_
#define CHROME_BROWSER_CHROMEOS_SYSTEM_POINTER_DEVICE_OBSERVER_H_
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "chrome/browser/chromeos/device_hierarchy_observer.h"
#include "ui/events/devices/input_device_event_observer.h"
namespace chromeos {
namespace system {
class PointerDeviceObserver : public DeviceHierarchyObserver,
public ui::InputDeviceEventObserver {
public:
PointerDeviceObserver();
virtual ~PointerDeviceObserver();
// Start observing device hierarchy.
void Init();
// Check for presence of devices.
void CheckDevices();
class Observer {
public:
virtual void TouchpadExists(bool exists) = 0;
virtual void MouseExists(bool exists) = 0;
protected:
Observer() {}
virtual ~Observer();
};
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
// DeviceHierarchyObserver:
virtual void DeviceHierarchyChanged() override;
virtual void DeviceAdded(int device_id) override {}
virtual void DeviceRemoved(int device_id) override {}
// InputDeviceEventObserver:
virtual void OnTouchscreenDeviceConfigurationChanged() override {}
virtual void OnKeyboardDeviceConfigurationChanged() override {}
virtual void OnMouseDeviceConfigurationChanged() override;
virtual void OnTouchpadDeviceConfigurationChanged() override;
// Check for pointer devices.
void CheckTouchpadExists();
void CheckMouseExists();
// Callback for pointer device checks.
void OnTouchpadExists(bool exists);
void OnMouseExists(bool exists);
ObserverList<Observer> observers_;
base::WeakPtrFactory<PointerDeviceObserver> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(PointerDeviceObserver);
};
} // namespace system
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_SYSTEM_POINTER_DEVICE_OBSERVER_H_
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