//**********************************************************************//
// Button cluck for the car arrived button. All it does is send the //
// string "Car" to the server. //
//**********************************************************************//
private void buttonCarArrived_Click(object sender, EventArgs e)
{
// Create a message to send to server
MessageProtocol sendCarMessage = new MessageProtocol(uniqueIDNumber, "CarSent", "-");
sendString(sendCarMessage.GetMessageToSend(), textBoxLightIP.Text);
}
//*********************************************************************//
// Change the status of the lights. //
//*********************************************************************//
private void ChangeLights(MessageProtocol command)
{
if (command == null)
{
return; // Nothing to do.
}
// Determine which light to turn on/off
if (command.GetActionValue().Equals("Red_On"))
{
labelRed.Visible = true;
}
if (command.GetActionValue().Equals("Amber_On"))
{
labelAmber.Visible = true;
}
if (command.GetActionValue().Equals("Green_On"))
{
labelGreen.Visible = true;
}
if (command.GetActionValue().Equals("Red_Off"))
{
labelRed.Visible = false;
}
if (command.GetActionValue().Equals("Amber_Off"))
{
labelAmber.Visible = false;
}
if (command.GetActionValue().Equals("Green_Off"))
{
labelGreen.Visible = false;
}
}
private void timer_Tick(object sender, EventArgs e)
{
// If the client is connected, send a car every once in a while
if (uniqueIDNumber != null && randomGen.Next(4) == 0)
{
MessageProtocol sendCarMessage = new MessageProtocol(uniqueIDNumber, "CarSent", "-");
sendString(sendCarMessage.GetMessageToSend(), textBoxLightIP.Text);
}
}
//*********************************************************************//
// Form closing. If the connection thread was ever created then kill //
// it off. //
//*********************************************************************//
private void FormTrafficLight_FormClosing(object sender, FormClosingEventArgs e)
{
MessageProtocol disconncetionMessage = new MessageProtocol(uniqueIDNumber, "ClientDisconnecting", "-");
sendString(disconncetionMessage.GetMessageToSend(), textBoxLightIP.Text);
if (threadConnection != null)
{
threadConnection.StopThread();
}
}
private void connectServerButton_Click(object sender, EventArgs e)
{
// Create message to send connection request
MessageProtocol connectMessage = new MessageProtocol("#", "ConnectionRequest", "-");
if (ValidateIPAddress() == true)
{
waitingToConnect = true;
// Send string requesting the unique ID assigned by the server
sendString(connectMessage.GetMessageToSend(), textBoxLightIP.Text);
}
}
//*********************************************************************//
// Message was posted back to us. This is to get over the C# threading//
// rules whereby we can only touch the UI components from the thread //
// that created them, which is the form's main thread. //
//*********************************************************************//
public void MessageReceived(Object received)
{
String message = (String)received;
listBoxOutput.Items.Add(DateTime.Now.ToString("h:mm:ss tt") + " " + message);
// Fit the received message to message protocol
MessageProtocol receivedMessage = new MessageProtocol(message);
// If the message is for this client and it is a light change request
if (receivedMessage.GetID() == uniqueIDNumber && receivedMessage.GetActionType().Equals("ChangeLight"))
{
ChangeLights(receivedMessage);
}
// If the connection request is accepted and this client is waiting to connect
else if (receivedMessage.GetActionType().Equals("ConnectionRequestAccepted") && waitingToConnect == true)
{
// Save the assigned ID number by the server
uniqueIDNumber = receivedMessage.GetActionValue();
idNumberLabel.Text = uniqueIDNumber;
// Enable or disable some parts of UI
buttonCarArrived.Enabled = true;
randomSendCheckBox.Enabled = true;
connectServerButton.Enabled = false;
textBoxLightIP.Enabled = false;
waitingToConnect = false;
}
// If the client receives message to disconnect from server
else if (receivedMessage.GetActionType().Equals("ClientDisconnect"))
{
// Turn off the lights
labelRed.Visible = false;
labelAmber.Visible = false;
labelGreen.Visible = false;
// Reset ID number assigned to this client
uniqueIDNumber = null;
idNumberLabel.Text = "";
// Enable or disable parts of UI
buttonCarArrived.Enabled = false;
connectServerButton.Enabled = true;
textBoxLightIP.Enabled = true;
}
}
