TouchpadContact.cs

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

namespace RawInput.Touchpad
{
	public struct TouchpadContact : IEquatable<TouchpadContact>
	{
		public int ContactId { get; }
		public int X { get; }
		public int Y { get; }

		public TouchpadContact(int contactId, int x, int y) =>
			(this.ContactId, this.X, this.Y) = (contactId, x, y);

		public override bool Equals(object obj) => (obj is TouchpadContact other) && Equals(other);

		public bool Equals(TouchpadContact other) =>
			(this.ContactId == other.ContactId) && (this.X == other.X) && (this.Y == other.Y);

		public static bool operator ==(TouchpadContact a, TouchpadContact b) => a.Equals(b);
		public static bool operator !=(TouchpadContact a, TouchpadContact b) => !(a == b);

		public override int GetHashCode() => (this.ContactId, this.X, this.Y).GetHashCode();

		public override string ToString() => $"Contact ID:{ContactId} Point:{X},{Y}";
	}

	internal class TouchpadContactCreator
	{
		public int? ContactId { get; set; }
		public int? X { get; set; }
		public int? Y { get; set; }

		public bool TryCreate(out TouchpadContact contact)
		{
			if (ContactId.HasValue && X.HasValue && Y.HasValue)
			{
				contact = new TouchpadContact(ContactId.Value, X.Value, Y.Value);
				return true;
			}
			contact = default;
			return false;
		}

		public void Clear()
		{
			ContactId = null;
			X = null;
			Y = null;
		}
	}
}