GUI.java

package com.evanram.code.java.dimchat_client;

import java.awt.*;
import java.awt.event.ActionEvent;  
import java.awt.event.ActionListener;
import java.io.IOException;

import javax.crypto.BadPaddingException;
import javax.swing.*;
import javax.swing.text.DefaultCaret;

public class GUI extends JFrame implements ActionListener
{

	private static final long serialVersionUID = 1L;
	private static JTextField ipTextField;
	private static JTextField portTextField;
	private static JButton sendButton;
	private static JTextArea outputTextArea;
	public static boolean isConnected;
	private JLabel dimchatLabel = new JLabel("dimchat - client");
	private static JTextField messageTextField;
	public static String connectionStateStr = "Connect";
	public static JButton connectButton = new JButton("Connect");
	private JButton debugButton;

	public GUI()
	{
		super("dimchat - client");

		//ip:port stuff
		JPanel topPanel = new JPanel(new GridLayout(0, 1));

		JPanel connectionPanel = new JPanel(new GridLayout(1, 5, 1, 3));

		ipTextField = new JTextField("");
		ipTextField.setToolTipText("Server IP (default: localhost)");
		ipTextField.setHorizontalAlignment(SwingConstants.LEFT);
		
		portTextField = new JTextField("");
		portTextField.setToolTipText("Server port (default: 38936)");
		portTextField.setHorizontalAlignment(SwingConstants.LEFT);

		dimchatLabel.setEnabled(false);

		connectButton.addActionListener(this);
		connectButton.setActionCommand("connect");
		connectButton.setMnemonic('C');
		
		connectionPanel.add(dimchatLabel);
		connectionPanel.add(ipTextField);
		connectionPanel.add(portTextField);
		connectionPanel.add(connectButton);

		topPanel.add(connectionPanel);

		add(topPanel, BorderLayout.NORTH);
		
		//output stuff
		outputTextArea = new JTextArea("[dimchat] Connect to a server!", 20, 20);
		JPanel centerPanel = new JPanel(new GridLayout(1, 5, 1, 3));
		JScrollPane scrollPane = new JScrollPane(outputTextArea);
		scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
		scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
		
		DefaultCaret caret = (DefaultCaret)outputTextArea.getCaret();
		caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
		
		outputTextArea.setLineWrap(true);
		
		centerPanel.add(scrollPane);
		outputTextArea.setEditable(false);
		add(centerPanel, BorderLayout.CENTER);
		
		//input stuff
		messageTextField = new JTextField(20);
		messageTextField.setHorizontalAlignment(SwingConstants.LEFT);
		
		sendButton = new JButton("Send");
		sendButton.setActionCommand("send");
		sendButton.addActionListener(this);
		
		debugButton = new JButton();
		debugButton.setSize(0, 0);
		debugButton.addActionListener(this);
		debugButton.setVisible(false);
		debugButton.setActionCommand("debug");
		debugButton.setMnemonic('D');
		
		JPanel lowerPanel = new JPanel();//new GridLayout());
		lowerPanel.add(messageTextField);
		lowerPanel.add(sendButton);
		lowerPanel.add(debugButton);
		add(lowerPanel, BorderLayout.SOUTH);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(525, 375);
		
		//put in center of screen
		Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
		this.setLocation(dim.width/2-this.getSize().width/2, dim.height/2-this.getSize().height/2);
		
		setVisible(true);
		messageTextField.requestFocus();
		
		
		
		//allow us to press enter to do send button (since it's invisible)
		getRootPane().setDefaultButton(sendButton);
	}

	@Override
	public void actionPerformed(final ActionEvent event)
	{
		new Thread(new Runnable(){

			//damn thing freezes if we don't have this in a separate thread
			@Override
			public void run()
			{
				//debug menu
				if("debug".equals(event.getActionCommand()))
				{
					setText("[dimchat] Connect to a server!");
					debugButton.setVisible(false);
					dimchatLabel.setText("     dimchat - client");
				}
				
				if("connect".equals(event.getActionCommand()))
				{
					if(ipTextField.getText().equals("_debug_"))
					{
						debugMode();
						return;
					}
					
					connectButton.setText(connectionStateStr);
					
					toggleConnectionFields(false);
					toggleSendingFields(true);
					
					connectButton.setEnabled(true);
					
					if(isConnected)
					{
						connectionStateStr = "Connect";
						connectButton.setText(connectionStateStr);
						try
						{
							Connections.socket.close();
						}
						catch (IOException e)
						{
							Message.logError("Error when closing socket. Please restart application.");
							toggleConnectionFields(false);
							toggleSendingFields(false);
						}
						Client.newConnection();
						setText("");
						isConnected = false;
						return;
					}
					
					if(!isConnected)
					{
						connectionStateStr = "Leave";
						connectButton.setText(connectionStateStr);
					}
					
					isConnected = true;
					
					//connect to server:
					//with empty ip
					if(ipTextField.getText().replace(" ", "").equals(""))
					{	
						//empty ip and non-empty port
						if(Connections.isValidAndNonEmptyPort(portTextField.getText()))
						{
							new Connections(Integer.parseInt(portTextField.getText()));
						}
						//empty ip and empty port
						else
						{
							new Connections();
						}
					}
					//with non-empty ip
					else
					{
						//non-empty ip and non-empty port
						if(Connections.isValidAndNonEmptyPort(portTextField.getText()))
						{
							new Connections(ipTextField.getText(), Integer.parseInt(portTextField.getText()));
						}
						//non-empty ip and empty port
						else
						{
							new Connections(ipTextField.getText());
						}
					}
				}
				else if("send".equals(event.getActionCommand()))
				{
					Message.setLastInput(messageTextField.getText());
					messageTextField.setText("");
				}
			}
			
		}).start();
	}
	
	
	public static void toggleConnectionFields(boolean toggle)
	{
		ipTextField.setEnabled(toggle);
		portTextField.setEnabled(toggle);
	}
	
	public static void toggleSendingFields(boolean toggle)
	{
		sendButton.setEnabled(toggle);
		messageTextField.setEnabled(toggle);
	}
	
	public static void disableAllButtons()
	{
		connectButton.setEnabled(false);
		sendButton.setEnabled(false);
	}
	
	public static void appendText(String message)
	{
		try
		{
			//prevent spamming enter button
			if(message.replace(" ", "").equals(""))
				return;
			
			outputTextArea.setText(outputTextArea.getText() + "\n" + message);
		}
		catch(NullPointerException e)
		{
			e.printStackTrace();
		}
	}
	
	public static void setText(String message)
	{
		outputTextArea.setText(message);
	}
	
	private void debugMode()
	{
		setText("[+] - - - [+]\nDebug mode.\nDimchat copyright (c) 2014 Evan Ram.\nPress \'X!\' button to return to normal chat." +
				"\nUse port field to send debug commands. Try \'help\' command.\n[+] - - - [+]\n");
		debugButton.setVisible(true);
		debugButton.setText("X!");
		dimchatLabel.setText("dimchat - DEBUG");
		
		if(portTextField.getText().equals("get"))
		{
			appendText("--------- showing dimensions ---------");
			for(double i = 1; i<=10; i+=.5)
			{
				appendText("[" + getSize().width*i + ", " + getSize().height*i +"]");
			}
			
		}
		else if(portTextField.getText().startsWith("DIM:"))
		{
			String[] a = portTextField.getText().substring(4).replace(" ", "").split(",");
			int a0 = Integer.parseInt(a[0]);
			int a1 = Integer.parseInt(a[1]);
			setSize(a0, a1);
		}
	}
	
	public static void initGUI(String title)
	{
		new GUI();
	}
}