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 DeviceLightDispatcher_h 6 #define DeviceLightDispatcher_h 7 8 #include "core/frame/PlatformEventDispatcher.h" 9 #include "public/platform/WebDeviceLightListener.h" 10 #include "wtf/RefPtr.h" 11 12 namespace blink { 13 14 class DeviceLightController; 15 16 // This class listens to device light data and notifies all registered controllers. 17 class DeviceLightDispatcher FINAL : public PlatformEventDispatcher, public WebDeviceLightListener { 18 public: 19 static DeviceLightDispatcher& instance(); 20 21 double latestDeviceLightData() const; 22 23 // Inherited from WebDeviceLightListener. 24 virtual void didChangeDeviceLight(double) OVERRIDE; 25 26 private: 27 DeviceLightDispatcher(); 28 virtual ~DeviceLightDispatcher(); 29 30 // Inherited from PlatformEventDispatcher. 31 virtual void startListening() OVERRIDE; 32 virtual void stopListening() OVERRIDE; 33 34 double m_lastDeviceLightData; 35 }; 36 37 } // namespace blink 38 39 #endif // DeviceLightDispatcher_h 40
