| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_EVENTS_DEVICE_DATA_MANAGER_H_ |
| #define UI_EVENTS_DEVICE_DATA_MANAGER_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/events/events_base_export.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace ui { |
| |
| // Keeps track of device mappings and event transformations. |
| class EVENTS_BASE_EXPORT DeviceDataManager { |
| public: |
| virtual ~DeviceDataManager(); |
| |
| static void CreateInstance(); |
| static DeviceDataManager* GetInstance(); |
| static bool HasInstance(); |
| |
| void ClearTouchTransformerRecord(); |
| void UpdateTouchInfoForDisplay(int64_t display_id, |
| int touch_device_id, |
| const gfx::Transform& touch_transformer); |
| void ApplyTouchTransformer(int touch_device_id, float* x, float* y); |
| int64_t GetDisplayForTouchDevice(int touch_device_id) const; |
| |
| protected: |
| DeviceDataManager(); |
| |
| static DeviceDataManager* instance(); |
| |
| static const int kMaxDeviceNum = 128; |
| |
| private: |
| static DeviceDataManager* instance_; |
| |
| bool IsTouchDeviceIdValid(int touch_device_id) const; |
| |
| // Table to keep track of which display id is mapped to which touch device. |
| int64_t touch_device_to_display_map_[kMaxDeviceNum]; |
| // Index table to find the TouchTransformer for a touch device. |
| gfx::Transform touch_device_transformer_map_[kMaxDeviceNum]; |
| |
| DISALLOW_COPY_AND_ASSIGN(DeviceDataManager); |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_EVENTS_DEVICE_DATA_MANAGER_H_ |