ui/events/ozone/device/device_manager.h

   1 // Copyright 2014 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 #ifndef UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_
   6 #define UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/events/ozone/events_ozone_export.h"
  10
  11 namespace ui {
  12
  13 class DeviceEventObserver;
  14
  15 class EVENTS_OZONE_EXPORT DeviceManager {
  16  public:
  17   virtual ~DeviceManager() {}
  18
  19   // Scans the currently available devices and notifies |observer| for each
  20   // device found. If also registering for notifications through AddObserver(),
  21   // the scan should happen after the registration otherwise the observer may
  22   // miss events.
  23   virtual void ScanDevices(DeviceEventObserver* observer) = 0;
  24
  25   // Registers |observer| for device event notifications.
  26   virtual void AddObserver(DeviceEventObserver* observer) = 0;
  27
  28   // Removes |observer| from the list of observers notified.
  29   virtual void RemoveObserver(DeviceEventObserver* observer) = 0;
  30 };
  31
  32 EVENTS_OZONE_EXPORT scoped_ptr<DeviceManager> CreateDeviceManager();
  33
  34 }  // namespace ui
  35
  36 #endif  // UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_