ChatDialog just goes Invisible when I press the X

[joe vasher]

I made the listener below to open up a ChatDialog(), The ChatDIalog I open, simply turns invisible when I press the X (! I THINK ???) So I reopen it with setVisible(true). is this all working the way I think it is? Is there any dangers doing this. This is a good way to keep a chat history?.?.

P.S. this will be working with threads. I can have several of these ChatDialogs opened or invisible at any one time.

thanks in advance.

		listPanel.setUserSelectedListener(new UserSelectedListener() {
			public void UserSelected(User user) {
				System.out.println("Selected: xxx" + user);
				if (user.getChatDialog() == null) {
					user.setChatDialog(new ChatDialog(user));
				} else {
					user.getChatDialog().setVisible(true);
				}
			}
		});


package com.pbuddie.graphics;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.TextArea;
import java.awt.TextField;

import javax.swing.BorderFactory;
import javax.swing.JDialog;
import javax.swing.JPanel;

import com.pbuddie.data.User;


public class ChatDialog extends JDialog {
	private TextArea displayTextArea;
	private TextField chatTextField;

	public ChatDialog(User user) {
		JPanel dialogPanel = new JPanel();
		displayTextArea = new TextArea();
		chatTextField = new TextField();
		
		
		 // Set up text area, field on panel
		dialogPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
		displayTextArea.setEditable(false);
		dialogPanel.setBackground(Color.LIGHT_GRAY);
		dialogPanel.setLayout(new BorderLayout());
		dialogPanel.add(chatTextField, BorderLayout.SOUTH);
		dialogPanel.add(displayTextArea, BorderLayout.CENTER);

		chatTextField.requestFocus();
		chatTextField.setCaretPosition(chatTextField.getText().length());
		
		// Set up Chat Dialog window
		setPreferredSize(new Dimension(500,250));
		setTitle("Talking with " + user);
		setLocationRelativeTo(ServerGUI.serverGUI);
		add(dialogPanel);
		pack();
		setVisible(true);
		chatTextField.requestFocus();
	}
}

[Darryl Burke]

If you don't want the user to be able to close the dialog, set the defaultCloseOperation to DO_NOTHING_ON_CLOSE.

[Campbell Ritchie]

You should bookmark the Java Tutorials, because they have all sorts of useful things in. Even a bit about what happens when you close a frame. Consider using dispose as a routine behaviour.