using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        UdpClient uc;
        Thread th;
        public Form1()
        {
            InitializeComponent();

            uc = new UdpClient(55555);
            uc.EnableBroadcast = true;
            th = new Thread(new ThreadStart(threadrun));
            th.Start();

        }
        void threadrun()
        {
            IPEndPoint iep =new IPEndPoint(IPAddress.Broadcast, 55555);
            while (true)
            {
                byte[] data = uc.Receive(ref iep);

                Point p = new Point();
                p.X = BitConverter.ToInt32(data, 0);
                p.Y = BitConverter.ToInt32(data, 4);
                lock (bejovo)
                {
                    bejovo.Add(p);
                }
             }

        }
        List<Point> bejovo = new List<Point>();

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        int oldmousex = -1; int oldmousey = -1;
        private void Form1_MouseMove_1(object sender, MouseEventArgs e)
        {

            string s = e.X + ";" + e.Y + e.Button;
            Graphics gr = CreateGraphics();
            //gr.Clear(Color.Black);
            //gr.DrawString(s,new Font("Arial",16), Brushes.DarkBlue, (float)e.X, (float)e.Y);
            //gr.DrawLine(Pens.Aquamarine,0,0,e.X,e.Y);
            //gr.DrawLine(Pens.Lime, Width, 0, e.X, e.Y);
            //gr.DrawLine(Pens.Gold, Width, Height, e.X, e.Y);
            //gr.DrawLine(Pens.BlueViolet, 0, Height, e.X, e.Y);
            //gr.DrawEllipse(Pens.Red,e.X-50,e.Y-50,100,100);
            //gr.DrawLine(Pens.Red,e.X,e.Y-80,e.X,e.Y+80);
            if ((e.Button & MouseButtons.Left) > 0 && oldmousex > 0)
            gr.DrawLine(Pens.Red,oldmousex,oldmousey,e.X,e.Y);
            oldmousex = e.X;
            oldmousey = e.Y;




            List<byte> data = new List<byte>();

            data.AddRange(BitConverter.GetBytes(e.X));
            data.AddRange(BitConverter.GetBytes(e.Y));


            uc.Send(data.ToArray(),data.ToArray().Length,new IPEndPoint(IPAddress.Broadcast,5555));

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Graphics g = CreateGraphics();
            g.Clear(Color.Black);

            lock (bejovo)
                {
                foreach (Point p in bejovo)
                    {
                    g.DrawEllipse(Pens.Red,p.X-5, p.Y-5,10,10);
                    }
                bejovo.Clear();
                }

        }
    }
}