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November 29, 2019 18:42
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| using System; | |
| using System.Collections.Generic; | |
| using System.ComponentModel; | |
| using System.Linq; | |
| using System.Runtime.InteropServices; | |
| using System.Text; | |
| using System.Threading; | |
| class UserActivityMonitor | |
| { | |
| public event EventHandler OnIdleEnter; | |
| public event EventHandler OnIdleExit; | |
| public int IdleTimeSeconds { get; set; } | |
| public bool IsRunning { get; private set; } | |
| public UserActivityMonitor(int idleTime) | |
| { | |
| this.IdleTimeSeconds = idleTime; | |
| } | |
| private bool inIdle; | |
| private Thread monitorThread; | |
| private void WorkerThread() | |
| { | |
| LASTINPUTINFO plii = new LASTINPUTINFO(); | |
| plii.cbSize = (uint)Marshal.SizeOf(plii); | |
| while (IsRunning) | |
| { | |
| if (!NativeMethods.GetLastInputInfo(ref plii)) | |
| { | |
| throw new Win32Exception(); | |
| } | |
| TimeSpan lastInputTime = TimeSpan.FromMilliseconds((((Environment.TickCount & int.MaxValue) - (plii.dwTime & int.MaxValue)) & int.MaxValue)); | |
| if (lastInputTime.TotalSeconds > IdleTimeSeconds) | |
| { | |
| if (!inIdle) | |
| { | |
| inIdle = true; | |
| OnIdleEnter?.Invoke(this, null); | |
| } | |
| Thread.Sleep(IdleTimeSeconds * 125); | |
| } | |
| else | |
| { | |
| if (inIdle) | |
| { | |
| inIdle = false; | |
| OnIdleExit?.Invoke(this, null); | |
| } | |
| Thread.Sleep(IdleTimeSeconds * 500); | |
| } | |
| } | |
| } | |
| private Thread StartWorkerThread() | |
| { | |
| inIdle = true; | |
| Thread t = new Thread(new ThreadStart(WorkerThread)); | |
| t.Start(); | |
| return t; | |
| } | |
| public void Start() | |
| { | |
| if (IsRunning) | |
| return; | |
| if (monitorThread != null) | |
| { | |
| if (monitorThread.IsAlive) | |
| return; | |
| monitorThread = null; | |
| } | |
| IsRunning = true; | |
| monitorThread = StartWorkerThread(); | |
| } | |
| public void Stop() | |
| { | |
| if (!IsRunning) | |
| return; | |
| if (monitorThread == null) | |
| return; | |
| if (!monitorThread.IsAlive) | |
| return; | |
| IsRunning = false; | |
| monitorThread.Join(); | |
| monitorThread = null; | |
| } | |
| } | |
| static class NativeMethods | |
| { | |
| [DllImport("user32")] | |
| internal static extern bool GetLastInputInfo(ref LASTINPUTINFO plii); | |
| } | |
| struct LASTINPUTINFO | |
| { | |
| public uint cbSize; | |
| public uint dwTime; | |
| } |
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