ui/events/device_hotplug_event_observer.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_DEVICE_HOTPLUG_EVENT_OBSERVER_H_
   6 #define UI_EVENTS_DEVICE_HOTPLUG_EVENT_OBSERVER_H_
   7
   8 #include <vector>
   9
  10 #include "ui/events/events_base_export.h"
  11
  12 namespace ui {
  13
  14 struct KeyboardDevice;
  15 struct TouchscreenDevice;
  16
  17 // Listener for specific input device hotplug events.
  18 class EVENTS_BASE_EXPORT DeviceHotplugEventObserver {
  19  public:
  20   virtual ~DeviceHotplugEventObserver() {}
  21
  22   // On a hotplug event this is called with the list of available touchscreen
  23   // devices. The set of touchscreen devices may not necessarily have changed.
  24   virtual void OnTouchscreenDevicesUpdated(
  25       const std::vector<TouchscreenDevice>& devices) = 0;
  26
  27   // On a hotplug event this is called with the list of available keyboard
  28   // devices. The set of keyboard devices may not necessarily have changed.
  29   virtual void OnKeyboardDevicesUpdated(
  30       const std::vector<KeyboardDevice>& devices) = 0;
  31 };
  32
  33 }  // namespace ui
  34
  35 #endif  // UI_EVENTS_DEVICE_HOTPLUG_EVENT_OBSERVER_H_