chrome/browser/chromeos/system/pointer_device_observer.cc

   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 "content/public/browser/browser_thread.h"
  12
  13 #if defined(USE_X11)
  14 #include "chrome/browser/chromeos/events/xinput_hierarchy_changed_event_listener.h"
  15 #endif
  16
  17 using content::BrowserThread;
  18
  19 namespace chromeos {
  20 namespace system {
  21
  22 PointerDeviceObserver::PointerDeviceObserver()
  23     : weak_factory_(this) {
  24 }
  25
  26 PointerDeviceObserver::~PointerDeviceObserver() {
  27 #if defined(USE_X11)
  28   XInputHierarchyChangedEventListener::GetInstance()
  29       ->RemoveObserver(this);
  30 #endif
  31 }
  32
  33 void PointerDeviceObserver::Init() {
  34 #if defined(USE_X11)
  35   XInputHierarchyChangedEventListener::GetInstance()
  36       ->AddObserver(this);
  37 #endif
  38 }
  39
  40 void PointerDeviceObserver::CheckDevices() {
  41   CheckMouseExists();
  42   CheckTouchpadExists();
  43 }
  44
  45 void PointerDeviceObserver::AddObserver(Observer* observer) {
  46   observers_.AddObserver(observer);
  47 }
  48
  49 void PointerDeviceObserver::RemoveObserver(Observer* observer) {
  50   observers_.RemoveObserver(observer);
  51 }
  52
  53 void PointerDeviceObserver::DeviceHierarchyChanged() {
  54   CheckDevices();
  55 }
  56
  57 void PointerDeviceObserver::CheckTouchpadExists() {
  58   InputDeviceSettings::Get()->TouchpadExists(
  59       base::Bind(&PointerDeviceObserver::OnTouchpadExists,
  60                  weak_factory_.GetWeakPtr()));
  61 }
  62
  63 void PointerDeviceObserver::CheckMouseExists() {
  64   InputDeviceSettings::Get()->MouseExists(
  65       base::Bind(&PointerDeviceObserver::OnMouseExists,
  66                  weak_factory_.GetWeakPtr()));
  67 }
  68
  69 void PointerDeviceObserver::OnTouchpadExists(bool exists) {
  70   FOR_EACH_OBSERVER(Observer, observers_, TouchpadExists(exists));
  71 }
  72
  73 void PointerDeviceObserver::OnMouseExists(bool exists) {
  74   FOR_EACH_OBSERVER(Observer, observers_, MouseExists(exists));
  75 }
  76
  77 PointerDeviceObserver::Observer::~Observer() {
  78 }
  79
  80 }  // namespace system
  81 }  // namespace chromeos