void watchForData()
{
try
{
while (connected == true)
{
// Tutaj pobieramy dane rysownicze od serwera i coś tam robione jest
IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] receivedBytes = udpClient.Receive(ref remoteEndPoint);
byte id = receivedBytes[0];
switch (receivedBytes[1])
{
case 0x01:
{
byte[] color = new byte[4];
Buffer.BlockCopy(receivedBytes, 2, color, 0, color.Length);
udpClients[id] = new PaintData(Color.FromArgb(BitConverter.ToInt32(color, 0)), new Point(0));
break;
}
case 0x02:
{
try
{
var client = udpClients[id];
byte[] pos = new byte[4];
Buffer.BlockCopy(receivedBytes, 2, pos, 0, pos.Length);
Point newPos = new Point(BitConverter.ToInt32(pos, 0));
if (client.StartPos.IsEmpty == true)
{
client.StartPos = newPos;
}
using (Pen p = new Pen(client.Color, 5.0F))
{
// Działamy na osobnym wątku, dlatego rysowanie na kontrolce
// musimy albo zlecić, albo wykonać od razu.
// Jeśli wykonamy od razu, to jest szansa na "wpadkę" i wyjątek, dlatego
// zlecamy jeśli jest to potrzebne
if (pictureBox1.InvokeRequired)
{
pictureBox1.Invoke(new Action(() =>
{
var graphics = Graphics.FromImage(pictureBox1.Image);
graphics.DrawLine(p, client.StartPos, newPos);
pictureBox1.Invalidate();
}));
}
else
{
var graphics = Graphics.FromImage(pictureBox1.Image);
graphics.DrawLine(p, client.StartPos, newPos);
pictureBox1.Invalidate();
}
}
client.StartPos = newPos;
}
catch (KeyNotFoundException) {}
break;
}
case 0x03:
{
try
{
var client = udpClients[id];
client.StartPos = new Point(0);
}
catch (KeyNotFoundException) {}
break;
}
}
}
}
catch (SocketException e)
{
if (connected == true)
{
MessageBox.Show(e.Message + "\n" + e.StackTrace);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
MessageBox.Show(e.Message + "\n" + e.StackTrace);
}
}
void ProcessMessage(Message message)
{
BinaryReader reader = message.Reader;
switch (message.Type)
{
case MessageType.Pong:
{
ReceivePong(reader.ReadInt32());
break;
}
case MessageType.ServerHello:
{
int port = reader.ReadInt32();
serverIP = new IPEndPoint(serverIPConnection.Address, port);
id = reader.ReadInt32();
if (form1.InvokeRequired)
{
form1.Invoke(new Action(() =>
{
form1.txtStatus.Text = "connected";
}));
}
if (connectionTask != null && !connectionTask.IsCanceled && !connectionTask.IsFaulted && !connectionTask.IsCompleted)
{
connectionTask.Dispose();
}
if (mainTask != null && !mainTask.IsCanceled && !mainTask.IsFaulted && !mainTask.IsCompleted)
{
mainTask.Dispose();
}
mainTask = Task.Run(new Action(netClient.Start));
break;
}
case MessageType.ServerUpdate:
byte penType = reader.ReadByte();
byte clientId;
switch ((MessageType)penType)
{
case MessageType.ClientUpdateStarted:
clientId = reader.ReadByte();
int color = reader.ReadInt32();
udpClients[clientId] = new PaintData(Color.FromArgb(color), new Point(0));
break;
case MessageType.ClientUpdateInProgress:
{
try
{
clientId = reader.ReadByte();
var client1 = udpClients[clientId];
short pointX = reader.ReadInt16();
short pointY = reader.ReadInt16();
Point newPos = new Point(pointX, pointY);
if (client1.StartPos.IsEmpty == true)
{
client1.StartPos = newPos;
}
using (Pen p = new Pen(client1.Color, 5.0F))
{
// Działamy na osobnym wątku, dlatego rysowanie na kontrolce
// musimy albo zlecić, albo wykonać od razu.
// Jeśli wykonamy od razu, to jest szansa na "wpadkę" i wyjątek, dlatego
// zlecamy jeśli jest to potrzebne
if (form1.pictureBox1.InvokeRequired)
{
form1.pictureBox1.Invoke(new Action(() =>
{
var graphics = Graphics.FromImage(form1.pictureBox1.Image);
graphics.DrawLine(p, client1.StartPos, newPos);
form1.pictureBox1.Invalidate();
}));
}
else
{
var graphics = Graphics.FromImage(form1.pictureBox1.Image);
graphics.DrawLine(p, client1.StartPos, newPos);
form1.pictureBox1.Invalidate();
}
}
client1.StartPos = newPos;
}
catch (KeyNotFoundException) { }
break;
}
case MessageType.ClientUpdateInEnd:
clientId = reader.ReadByte();
var client = udpClients[clientId];
client.StartPos = new Point(0);
break;
}
break;
}
message.Reader.Close();
message.Stream.Close();
}
