1 // Copyright (c) 2012 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.
5 #ifndef CHROME_BROWSER_CHROMEOS_SYSTEM_POINTER_DEVICE_OBSERVER_H_
6 #define CHROME_BROWSER_CHROMEOS_SYSTEM_POINTER_DEVICE_OBSERVER_H_
8 #include "base/memory/weak_ptr.h"
9 #include "base/observer_list.h"
10 #include "chrome/browser/chromeos/device_hierarchy_observer.h"
15 class PointerDeviceObserver : public DeviceHierarchyObserver {
17 PointerDeviceObserver();
18 virtual ~PointerDeviceObserver();
20 // Start observing device hierarchy.
23 // Check for presence of devices.
28 virtual void TouchpadExists(bool exists) = 0;
29 virtual void MouseExists(bool exists) = 0;
35 void AddObserver(Observer* observer);
36 void RemoveObserver(Observer* observer);
39 // DeviceHierarchyObserver implementation.
40 virtual void DeviceHierarchyChanged() override;
41 virtual void DeviceAdded(int device_id) override {}
42 virtual void DeviceRemoved(int device_id) override {}
44 // Check for pointer devices.
45 void CheckTouchpadExists();
46 void CheckMouseExists();
48 // Callback for pointer device checks.
49 void OnTouchpadExists(bool exists);
50 void OnMouseExists(bool exists);
52 ObserverList<Observer> observers_;
54 base::WeakPtrFactory<PointerDeviceObserver> weak_factory_;
56 DISALLOW_COPY_AND_ASSIGN(PointerDeviceObserver);
60 } // namespace chromeos
62 #endif // CHROME_BROWSER_CHROMEOS_SYSTEM_POINTER_DEVICE_OBSERVER_H_