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_DATA_MANAGER_H_ 6 #define UI_EVENTS_DEVICE_DATA_MANAGER_H_ 7 8 #include <stdint.h> 9 10 #include <vector> 11 12 #include "base/macros.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "base/observer_list.h" 15 #include "ui/events/device_hotplug_event_observer.h" 16 #include "ui/events/events_base_export.h" 17 #include "ui/events/touchscreen_device.h" 18 #include "ui/gfx/transform.h" 19 20 namespace ui { 21 22 class InputDeviceEventObserver; 23 24 // Keeps track of device mappings and event transformations. 25 class EVENTS_BASE_EXPORT DeviceDataManager : public DeviceHotplugEventObserver { 26 public: 27 virtual ~DeviceDataManager(); 28 29 static void CreateInstance(); 30 static DeviceDataManager* GetInstance(); 31 static bool HasInstance(); 32 33 void ClearTouchTransformerRecord(); 34 void UpdateTouchInfoForDisplay(int64_t display_id, 35 int touch_device_id, 36 const gfx::Transform& touch_transformer); 37 void ApplyTouchTransformer(int touch_device_id, float* x, float* y); 38 int64_t GetDisplayForTouchDevice(int touch_device_id) const; 39 40 void UpdateTouchRadiusScale(int touch_device_id, double scale); 41 void ApplyTouchRadiusScale(int touch_device_id, double* radius); 42 touchscreen_devices()43 const std::vector<TouchscreenDevice>& touchscreen_devices() const { 44 return touchscreen_devices_; 45 } 46 47 void AddObserver(InputDeviceEventObserver* observer); 48 void RemoveObserver(InputDeviceEventObserver* observer); 49 50 protected: 51 DeviceDataManager(); 52 53 static DeviceDataManager* instance(); 54 55 static const int kMaxDeviceNum = 128; 56 57 private: 58 static DeviceDataManager* instance_; 59 60 bool IsTouchDeviceIdValid(int touch_device_id) const; 61 62 // DeviceHotplugEventObserver: 63 virtual void OnTouchscreenDevicesUpdated( 64 const std::vector<TouchscreenDevice>& devices) OVERRIDE; 65 66 double touch_radius_scale_map_[kMaxDeviceNum]; 67 68 // Table to keep track of which display id is mapped to which touch device. 69 int64_t touch_device_to_display_map_[kMaxDeviceNum]; 70 // Index table to find the TouchTransformer for a touch device. 71 gfx::Transform touch_device_transformer_map_[kMaxDeviceNum]; 72 73 std::vector<TouchscreenDevice> touchscreen_devices_; 74 75 ObserverList<InputDeviceEventObserver> observers_; 76 77 DISALLOW_COPY_AND_ASSIGN(DeviceDataManager); 78 }; 79 80 } // namespace ui 81 82 #endif // UI_EVENTS_DEVICE_DATA_MANAGER_H_ 83