using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace Tango.Touch.Helpers
{
    public static class TouchHelper
    {
        [DllImport("user32.dll")]
        private static extern int GetSystemMetrics(int nIndex);

        /// <summary>
        /// Determines whether the current machine is touch enabled.
        /// </summary>
        public static bool IsTouchEnabled()
        {
            const int MAXTOUCHES_INDEX = 95;
            int maxTouches = GetSystemMetrics(MAXTOUCHES_INDEX);

            if (maxTouches > 0)
            {
                return true;
            }

            foreach (TabletDevice tabletDevice in Tablet.TabletDevices)
            {
                if (tabletDevice.Type == TabletDeviceType.Touch && !String.IsNullOrWhiteSpace(tabletDevice.Name))
                    return true;
            }

            return false;
        }
    }
}