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      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.
      4 
      5 #include "chrome/browser/chromeos/system/pointer_device_observer.h"
      6 
      7 #include "base/basictypes.h"
      8 #include "base/bind.h"
      9 #include "base/bind_helpers.h"
     10 #include "chrome/browser/chromeos/system/input_device_settings.h"
     11 #include "chrome/browser/chromeos/xinput_hierarchy_changed_event_listener.h"
     12 #include "content/public/browser/browser_thread.h"
     13 
     14 using content::BrowserThread;
     15 
     16 namespace chromeos {
     17 namespace system {
     18 
     19 PointerDeviceObserver::PointerDeviceObserver()
     20     : weak_factory_(this) {
     21 }
     22 
     23 PointerDeviceObserver::~PointerDeviceObserver() {
     24   XInputHierarchyChangedEventListener::GetInstance()
     25       ->RemoveObserver(this);
     26 }
     27 
     28 void PointerDeviceObserver::Init() {
     29   XInputHierarchyChangedEventListener::GetInstance()
     30       ->AddObserver(this);
     31 }
     32 
     33 void PointerDeviceObserver::CheckDevices() {
     34   CheckMouseExists();
     35   CheckTouchpadExists();
     36 }
     37 
     38 void PointerDeviceObserver::AddObserver(Observer* observer) {
     39   observers_.AddObserver(observer);
     40 }
     41 
     42 void PointerDeviceObserver::RemoveObserver(Observer* observer) {
     43   observers_.RemoveObserver(observer);
     44 }
     45 
     46 void PointerDeviceObserver::DeviceHierarchyChanged() {
     47   CheckDevices();
     48 }
     49 
     50 void PointerDeviceObserver::CheckTouchpadExists() {
     51   touchpad_settings::TouchpadExists(
     52       base::Bind(&PointerDeviceObserver::OnTouchpadExists,
     53                  weak_factory_.GetWeakPtr()));
     54 }
     55 
     56 void PointerDeviceObserver::CheckMouseExists() {
     57   mouse_settings::MouseExists(
     58       base::Bind(&PointerDeviceObserver::OnMouseExists,
     59                  weak_factory_.GetWeakPtr()));
     60 }
     61 
     62 void PointerDeviceObserver::OnTouchpadExists(bool exists) {
     63   FOR_EACH_OBSERVER(Observer, observers_, TouchpadExists(exists));
     64 }
     65 
     66 void PointerDeviceObserver::OnMouseExists(bool exists) {
     67   FOR_EACH_OBSERVER(Observer, observers_, MouseExists(exists));
     68 }
     69 
     70 PointerDeviceObserver::Observer::~Observer() {
     71 }
     72 
     73 }  // namespace system
     74 }  // namespace chromeos
     75