jlogin.java.bak

an instant messenger written in java (client)

// Name: Kenneth Wong
// Department: EE4
// ID: B93901176
// NMM -- Messenger (Client)

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.net.*;
import java.io.*;

public class JLogin extends JFrame implements ActionListener, KeyListener
{
    private JLabel Title, Username, Server_IP, Port; 
    private JTextField txtUsername, txtServer_IP, txtPort;
    private JPanel Panel1, Panel2, Panel3;
    private JButton Button1, Button2;
    private LoginListener listener;   
        
    public JLogin(LoginListener l)
    {
        super("Messenger Login");
        
        listener = l;
        
        Container platform = getContentPane();
        platform.setLayout(new GridLayout(3,1));
        
        Panel1 = new JPanel(null);
        Panel2 = new JPanel(null);
        Panel3 = new JPanel(null);
        Panel1.setLayout(new BorderLayout());
        Panel2.setLayout(new GridLayout(3,2));
        Panel3.setLayout(new FlowLayout());
        
        Title = new JLabel("                      Messenger");
        Panel1.add(Title, BorderLayout.CENTER);
        
        Username = new JLabel("         Username: ");
        Server_IP = new JLabel("         Server: ");
        Port = new JLabel("         Port: ");
        txtUsername = new JTextField("");
        txtServer_IP = new JTextField("127.0.0.1");
        txtPort = new JTextField("1000");   // Port number: set to 6357
        Panel2.add(Username);
        Panel2.add(txtUsername);
        Panel2.add(Server_IP);
        Panel2.add(txtServer_IP);
        Panel2.add(Port);
        Panel2.add(txtPort);
        
        Button1 = new JButton("Login");
        Button2 = new JButton("Cancel");
        Button1.addActionListener(this);
        Button2.addActionListener(this);
        Panel3.add(Button1);
        Panel3.add(Button2);
        
        platform.add(Panel1);
        platform.add(Panel2);
        platform.add(Panel3); 
        
        txtUsername.addKeyListener(this);
        //Button1.setFocusable(true);
           
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(250,300);
        //setVisible(true);   // will be removed when JMessenger.java finished!
    }

    public void keyTyped(KeyEvent k){}
    public void keyReleased(KeyEvent k){}
    public void keyPressed(KeyEvent k)
    {
    	if (k.getKeyCode() == KeyEvent.VK_ENTER)
        {
        	 int port;
            
            	 if (txtUsername.getText().equals(""))
               		JOptionPane.showMessageDialog(null, "No Username found", "Login failed", JOptionPane.ERROR_MESSAGE);
            	 else{
                    	try
                    	{
                    		port = Integer.parseInt(txtPort.getText());    
                    		listener.onConnectRequest(txtServer_IP.getText(), port, txtUsername.getText());  // to be defined!
                    	}
                    	catch(NumberFormatException c)
                    	{
                    		JOptionPane.showMessageDialog(null, "Invalid port number", "Login failed", JOptionPane.ERROR_MESSAGE);   
                        }
                 }    // end of else
        }   
    }

    public void actionPerformed(ActionEvent e)
    {
        if (e.getSource() == Button2)
            listener.onLoginCancel();  
        if (e.getSource() == Button1){
            int port;
            
            if (txtUsername.getText().equals(""))
                JOptionPane.showMessageDialog(null, "No Username found", "Login failed", JOptionPane.ERROR_MESSAGE);
            else{
                try
                {
                    port = Integer.parseInt(txtPort.getText());    
                    listener.onConnectRequest(txtServer_IP.getText(), port, txtUsername.getText());  // to be defined!
                }
                catch(NumberFormatException c)
                {
                    JOptionPane.showMessageDialog(null, "Invalid port number", "Login failed", JOptionPane.ERROR_MESSAGE);   
                }
            }   // end of else
        }   // end of first if loop
    }

}