private static void ListenLoop()
{
_stream = _state.workClient.GetStream();
NquireLog.WriteLine("Acquired network stream.");
NquireListenerState lastState = ListenerState;
string lastTouch = "-1";
string data = string.Empty;
// Loop to receive all the data sent by the client.
//while ((i = _stream.Read(_state.buffer, 0, StateObject.BufferSize)) != 0)
while (ListenerState != NquireListenerState.Closing)
{
lastState = ListenerState;
// A scan or Touch has been sent from the device
int i = 0;
if ((i = _stream.Read(_state.buffer, 0, StateObject.BufferSize)) != 0)
{
data = Encoding.ASCII.GetString(_state.buffer, 0, i);
// Two first chars of "KT" denotes the device has timed out to Idle
if (data.Substring(0, 2) == "KT")
{
NquireLog.WriteLine("Device timed out to Idle.");
ListenerState = NquireListenerState.Idle;
}
// A first char of "K" denotes a button Touch; the second char (0-9, a-f) denotes the button index / .gif name
else if (data.Substring(0, 1) == "K")
{
lastTouch = data.Substring(1, 1);
NquireLog.WriteLine(string.Format("Received Touch: Button {0}", lastTouch));
ListenerState = NquireListenerState.JustTouched;
}
// Otherwise it's a Scan
else
{
NquireInterpreter.Scans.Add(data.ToUpper());
NquireLog.WriteLine(string.Format("Received Scan: {0}", data));
ListenerState = NquireListenerState.JustScanned;
}
data = string.Empty;
}
switch (ListenerState)
{
case NquireListenerState.JustScanned:
/*=========TEST=========
//Send back a response to the device
NquireLabel testLabel = new NquireLabel();
testLabel.nqText = "CRAIG";
testLabel.nqGifNamePressed = "1.gif";
testLabel.nqGifNameReleased = "1.gif";
testLabel.nqAlignment = NquireParamAlign.LEFT_TOP;
testLabel.nqFontSize = NquireParamFont.FONT_NORMAL;
NquireButton testButton = new NquireButton();
testButton.nqGifNameReleased = "1.gif";
testButton.nqGifNamePressed = "1.gif";
char[] cmd = testLabel.GetNquireString().Concat(testButton.GetNquireString()).ToArray();
SendNquireCommand(cmd, true);
ListenerState = NquireListenerState.WaitingTouch;
*/
break;
case NquireListenerState.JustTouched:
if (lastTouch != "-1")
{
lastTouch = "-1";
}
break;
case NquireListenerState.WaitingTouch:
break;
case NquireListenerState.WaitingScan:
break;
}
if (lastState != ListenerState)
{
NquireLog.WriteLine(string.Format("Listener State: {0}", ListenerState.ToString()));
}
}
ListenerState = NquireListenerState.On;
}
public static void Disconnect()
{
TcpClient clientRef = _state.workClient;
TcpListener serverRef = _state.workServer;
clientRef.Close();
NquireLog.WriteLine("TcpClient closed.");
serverRef.Stop();
NquireLog.WriteLine("TcpListener stopped.");
ListenerState = NquireListenerState.Off;
}
private static void ConnectCallback(IAsyncResult ar)
{
try
{
TcpListener serverRef = (TcpListener)ar.AsyncState;
_state.workClient = serverRef.EndAcceptTcpClient(ar);
_connectDone.Set();
ListenerState = NquireListenerState.Idle;
NquireLog.WriteLine("Async: finished connecting.");
NquireLog.WriteLine(string.Format("TcpClient connected to: {0}", IP.ToString() + ":" + Port));
ListenLoop();
}
catch (Exception e)
{
ListenerState = NquireListenerState.Off;
if (e is IOException)
{
// Do nothing - avoids an IOException message being returned
// when the connection is terminated.
}
else
{
NquireLog.WriteLine("Connection error!");
NquireLog.WriteLine(e.HResult.ToString());
NquireLog.WriteLine(e.ToString());
}
}
}
public static void Connect()
{
_connectDone.Reset();
IP = IPAddress.Parse(Properties.Settings.Default.IPAddress);
Port = int.Parse(Properties.Settings.Default.TCP);
Client = new TcpClient();
Server = new TcpListener(IP, Port);
_state = new StateObject();
_state.workClient = Client;
_state.workServer = Server;
ListenerState = NquireListenerState.On;
Server.Start();
NquireLog.WriteLine("TcpListener started.");
NquireLog.WriteLine("Async: beginning connect...");
Server.BeginAcceptTcpClient(new AsyncCallback(ConnectCallback), Server);
_connectDone.WaitOne();
}
