fileFinder/fileFinder/TaskController.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Timers;

namespace fileFinder
{
    class TaskController
    {
        public bool isPaused { get; private set; }
        public bool isStopped { get; private set; }
        public bool isFormUpdatedAfterPause { get; set; }
        private Stopwatch stopwatch = new Stopwatch();

        public TaskController ()
        {
            isPaused = false;
            isStopped = true;
            isFormUpdatedAfterPause = true;
        }

        public bool beginTask ()
        {
            isPaused = false;
            isStopped = false;
            stopwatch.Restart();
            return true;
        }

        public bool pauseTask ()
        {
            if (!isPaused && !isStopped)
            {
                isPaused = true;
                isFormUpdatedAfterPause = false;
                stopwatch.Stop();
                return true;
            } else
                return false;
        }
        
        public bool resumeTask ()
        {
            if (isPaused && !isStopped)
            {
                isPaused = false;
                stopwatch.Start();
                return true;
            } else
                return false;
        }

        public bool stopTask ()
        {
            if (!isStopped)
            {
                isStopped = true;
                stopwatch.Stop();
                return true;
            } else
                return false;
        }

        public TimeSpan elapsedTime ()
        {
            return stopwatch.Elapsed;
        }
    }
}