94 lines
3 KiB
C#
94 lines
3 KiB
C#
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/*
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* Pedometer
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* Copyright (c) 2017 Yusuf Olokoba
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*/
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namespace PedometerU {
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using Platforms;
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using System;
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using System.Linq;
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public sealed class Pedometer : IDisposable {
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#region --Properties--
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/// <summary>
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/// How many updates has this pedometer received? Useful for calculating pedometer precision
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/// </summary>
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public int updateCount {get; private set;}
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/// <summary>
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/// Pedometer implementation for the current device. Do not use unless you know what you are doing
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/// </summary>
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public static IPedometer Implementation {
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get {
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return _Implementation = _Implementation ?? new IPedometer[] {
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new PedometerAndroid(),
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new PedometeriOS(),
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new PedometerGPS() // Always supported, uses GPS (so highly inaccurate)
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}.First(impl => impl.IsSupported).Initialize();
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}
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}
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private static IPedometer _Implementation;
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#endregion
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#region --Op vars--
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private int initialSteps; // Some step counters count from device boot, so subtract the initial count we get
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private double initialDistance;
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private readonly StepCallback callback;
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#endregion
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#region --Ctor--
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/// <summary>
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/// Create a new pedometer and start listening for updates
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/// </summary>
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public Pedometer (StepCallback callback) {
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// Save the callback
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this.callback = callback;
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// Register callback
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Implementation.OnStep += OnStep;
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}
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#endregion
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#region --Operations--
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/// <summary>
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/// Stop listening for pedometer updates and dispose the object
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/// </summary>
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public void Dispose () {
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// Unregister callback
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Implementation.OnStep -= OnStep;
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}
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/// <summary>
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/// Release Pedometer and all of its resources
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/// </summary>
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public static void Release () {
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if (_Implementation == null) return;
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// Release and dereference
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_Implementation.Release();
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_Implementation = null;
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}
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private void OnStep (int steps, double distance) { // DEPLOY // UpdateCount post increment
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// Set initials and increment update count
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initialSteps = updateCount++ == 0 ? steps : initialSteps;
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initialDistance = steps == initialSteps ? distance : initialDistance;
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// If this is not the first step, then invoke the callback
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if (steps != initialSteps) if (callback != null) callback(steps - initialSteps, distance - initialDistance);
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}
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#endregion
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}
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/// <summary>
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/// A delegate used to pass pedometer information
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/// </summary>
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/// <param name="steps">Number of steps taken</param>
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/// <param name="distance">Distance walked in meters</param>
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public delegate void StepCallback (int steps, double distance);
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}
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