| // 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 CHROMEOS_ACCELEROMETER_ACCELEROMETER_TYPES_H_ |
| #define CHROMEOS_ACCELEROMETER_ACCELEROMETER_TYPES_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "chromeos/chromeos_export.h" |
| |
| namespace chromeos { |
| |
| enum AccelerometerSource { |
| // Accelerometer is located in the device's screen. In the screen's natural |
| // orientation, positive X points to the right, consistent with the pixel |
| // position. Positive Y points up the screen. Positive Z is perpendicular to |
| // the screen, pointing outwards towards the user. The orientation is |
| // described at: |
| // http://www.html5rocks.com/en/tutorials/device/orientation/. |
| ACCELEROMETER_SOURCE_SCREEN = 0, |
| |
| // Accelerometer is located in a keyboard attached to the device's screen. |
| // If the device is open 180 degrees the orientation is consistent with the |
| // screen. I.e. Positive X points to the right, positive Y points up on the |
| // keyboard and positive Z is perpendicular to the keyboard pointing out |
| // towards the user. |
| ACCELEROMETER_SOURCE_ATTACHED_KEYBOARD, |
| |
| ACCELEROMETER_SOURCE_COUNT |
| }; |
| |
| struct CHROMEOS_EXPORT AccelerometerReading { |
| AccelerometerReading(); |
| ~AccelerometerReading(); |
| |
| // If true, this accelerometer is being updated. |
| bool present; |
| |
| // The readings from this accelerometer measured in m/s^2. |
| float x; |
| float y; |
| float z; |
| }; |
| |
| // An accelerometer update contains the last known value for each of the |
| // accelerometers present on the device. |
| class CHROMEOS_EXPORT AccelerometerUpdate |
| : public base::RefCountedThreadSafe<AccelerometerUpdate> { |
| public: |
| AccelerometerUpdate(); |
| |
| // Returns true if |source| has a valid value in this update. |
| bool has(AccelerometerSource source) const { return data_[source].present; } |
| |
| // Returns the last known value for |source|. |
| const AccelerometerReading& get(AccelerometerSource source) const { |
| return data_[source]; |
| } |
| |
| void Set(AccelerometerSource source, float x, float y, float z) { |
| data_[source].present = true; |
| data_[source].x = x; |
| data_[source].y = y; |
| data_[source].z = z; |
| } |
| |
| protected: |
| AccelerometerReading data_[ACCELEROMETER_SOURCE_COUNT]; |
| |
| private: |
| friend class base::RefCountedThreadSafe<AccelerometerUpdate>; |
| |
| virtual ~AccelerometerUpdate(); |
| |
| DISALLOW_COPY_AND_ASSIGN(AccelerometerUpdate); |
| }; |
| |
| } // namespace chromeos |
| |
| #endif // CHROMEOS_ACCELEROMETER_ACCELEROMETER_TYPES_H_ |