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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
namespace Tizen.Sensor
{
/// <summary>
/// LinearAccelerationSensor Class. Used for registering callbacks for linear acceleration sensor and getting linear acceleration data
/// /// </summary>
public sealed class LinearAccelerationSensor : Sensor
{
private const string LinearAccelerationSensorKey = "http://tizen.org/feature/sensor.linear_acceleration";
private event EventHandler<SensorAccuracyChangedEventArgs> _accuracyChanged;
/// <summary>
/// Gets the X component of the linear acceleration.
/// </summary>
public float X { get; private set; } = float.MinValue;
/// <summary>
/// Gets the Y component of the linear acceleration.
/// </summary>
public float Y { get; private set; } = float.MinValue;
/// <summary>
/// Gets the Z component of the linear acceleration.
/// </summary>
public float Z { get; private set; } = float.MinValue;
/// <summary>
/// Returns true or false based on whether linear acceleration sensor is supported by device.
/// </summary>
public static bool IsSupported
{
get
{
Log.Info(Globals.LogTag, "Checking if the LinearAccelerationSensor is supported");
return CheckIfSupported(SensorType.LinearAccelerationSensor, LinearAccelerationSensorKey);
}
}
/// <summary>
/// Returns the number of linear acceleration sensors available on the device.
/// </summary>
public static int Count
{
get
{
Log.Info(Globals.LogTag, "Getting the count of linear acceleration sensors");
return GetCount();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Tizen.Sensor.LinearAccelerationSensor"/> class.
/// </summary>
/// <exception cref="ArgumentException">Thrown when an invalid argument is used</exception>
/// <exception cref="NotSupportedException">Thrown when the sensor is not supported</exception>
/// <exception cref="InvalidOperationException">Thrown when the operation is invalid for the current state</exception>
/// <param name='index'>
/// Index. Default value for this is 0. Index refers to a particular linear acceleration sensor in case of multiple sensors
/// </param>
public LinearAccelerationSensor(uint index = 0) : base(index)
{
Log.Info(Globals.LogTag, "Creating LinearAccelerationSensor object");
}
internal override SensorType GetSensorType()
{
return SensorType.LinearAccelerationSensor;
}
/// <summary>
/// Event Handler for storing the callback functions for event corresponding to change in linear acceleration sensor data.
/// </summary>
public event EventHandler<LinearAccelerationSensorDataUpdatedEventArgs> DataUpdated;
/// <summary>
/// Event handler for accuracy changed events.
/// </summary>
public event EventHandler<SensorAccuracyChangedEventArgs> AccuracyChanged
{
add
{
if (_accuracyChanged == null)
{
AccuracyListenStart();
}
_accuracyChanged += value;
}
remove
{
_accuracyChanged -= value;
if (_accuracyChanged == null)
{
AccuracyListenStop();
}
}
}
private static int GetCount()
{
IntPtr list;
int count;
int error = Interop.SensorManager.GetSensorList(SensorType.LinearAccelerationSensor, out list, out count);
if (error != (int)SensorError.None)
{
Log.Error(Globals.LogTag, "Error getting sensor list for linear acceleration sensor");
count = 0;
}
else
Interop.Libc.Free(list);
return count;
}
protected internal override void EventListenStart()
{
int error = Interop.SensorListener.SetEventCallback(ListenerHandle, Interval, SensorEventCallback, IntPtr.Zero);
if (error != (int)SensorError.None)
{
Log.Error(Globals.LogTag, "Error setting event callback for linear acceleration sensor");
throw SensorErrorFactory.CheckAndThrowException(error, "Unable to set event callback for linear acceleration sensor");
}
}
protected internal override void EventListenStop()
{
int error = Interop.SensorListener.UnsetEventCallback(ListenerHandle);
if (error != (int)SensorError.None)
{
Log.Error(Globals.LogTag, "Error unsetting event callback for linear acceleration sensor");
throw SensorErrorFactory.CheckAndThrowException(error, "Unable to unset event callback for linear acceleration");
}
}
private void AccuracyListenStart()
{
int error = Interop.SensorListener.SetAccuracyCallback(ListenerHandle, Interval, AccuracyEventCallback, IntPtr.Zero);
if (error != (int)SensorError.None)
{
Log.Error(Globals.LogTag, "Error setting accuracy event callback for linear acceleration sensor");
throw SensorErrorFactory.CheckAndThrowException(error, "Unable to set accuracy event callback for linear acceleration sensor");
}
}
private void AccuracyListenStop()
{
int error = Interop.SensorListener.UnsetAccuracyCallback(ListenerHandle);
if (error != (int)SensorError.None)
{
Log.Error(Globals.LogTag, "Error unsetting accuracy event callback for linear acceleration sensor");
throw SensorErrorFactory.CheckAndThrowException(error, "Unable to unset accuracy event callback for linear acceleration sensor");
}
}
private void SensorEventCallback(IntPtr sensorHandle, IntPtr sensorPtr, IntPtr data)
{
Interop.SensorEventStruct sensorData = Interop.IntPtrToEventStruct(sensorPtr);
TimeSpan = new TimeSpan((Int64)sensorData.timestamp);
X = sensorData.values[0];
Y = sensorData.values[1];
Z = sensorData.values[2];
DataUpdated?.Invoke(this, new LinearAccelerationSensorDataUpdatedEventArgs(sensorData.values));
}
private void AccuracyEventCallback(IntPtr sensorHandle, UInt64 timestamp, SensorDataAccuracy accuracy, IntPtr data)
{
TimeSpan = new TimeSpan((Int64)timestamp);
_accuracyChanged?.Invoke(this, new SensorAccuracyChangedEventArgs(new TimeSpan((Int64)timestamp), accuracy));
}
}
}
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