Thread: Newbish Question...(s)

So I'm using the code below to to make a frame with radio buttons and what not. I've pretty much just modeled this after some code in my programming book so it looks weird. =/
I've implemented this into my other code so that it displays when I need to prompt the user for a response, which I originally got via scanner. I want this to update the users response automatically with a preset response based by selection of one of the radio buttons. As you can see I've done this in itemStateChanged method. But my problem is the program won't stop and wait for the user to give a response via selecting a radio button. What kind of options do I have to make it wait for that response? I honestly have no clue what to do? I could say if the response == 0 instead of 1 2 or 3 then pause somehow? but then how would it know to go again?

On a side note, I'm using ItemListener and fonts and ItemEvent that change the text above. Which is completely useless to me for what I'm trying to accomplish.. -.- It was part of the other program I modeled this after.
But I decided to use them since the font is an Item I guess? That works with the stuff mentioned above. Soo.. any hints or samples I could use to pass the response from the radio buttons to the itemStateChanged method correctly? Can I create other kinds of objects like this: loginFont = new Font("Serif", Font.PLAIN, 14); with string or something different? cause fonts is a little ridiculous.
.. I swear I had another question. But it's not coming to me right now..

edit: Oh yes, how can I ensure the frame closes when I'm done with it? What kind of code is there to do this?

Thanks for any help! =)

import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.*;
 
import javax.swing.*;
 
public class NewLogin extends JFrame
{
	private Font loginFont;
	private Font registerFont;
	private Font exitFont;
	private JTextField textField;
	private JRadioButton loginButton;
	private JRadioButton registerButton;
	private JRadioButton exitButton;
	private ButtonGroup radioGroup;
 
	Login Login = new Login();
 
	public NewLogin()
	{
		super("Super Game");
		setLayout(new FlowLayout()); // set frame layout
 
		textField = new JTextField("Which action would you like to perform?",
				30);
		add(textField); // add textField to Jframe
 
		// create radio buttons
		loginButton = new JRadioButton("Login", false);
		registerButton = new JRadioButton("Register", false);
		exitButton = new JRadioButton("Exit", false);
		add(loginButton);
		add(registerButton);
		add(exitButton);
 
		// create logical relationship between JRadioButtons
		radioGroup = new ButtonGroup(); // create button group
		radioGroup.add(loginButton);
		radioGroup.add(registerButton);
		radioGroup.add(exitButton);
 
		// create font objects
		loginFont = new Font("Serif", Font.PLAIN, 14);
		registerFont = new Font("Serif", Font.BOLD, 14);
		exitFont = new Font("Serif", Font.ITALIC, 14);
 
		// register events for JRadioButtons
		loginButton.addItemListener(new RadioButtonHandler(loginFont));
		registerButton.addItemListener(new RadioButtonHandler(registerFont));
		exitButton.addItemListener(new RadioButtonHandler(exitFont));
 
	}// end RadioButtonFrame
 
	private class RadioButtonHandler implements ItemListener
	{
		private Font font;
 
		public RadioButtonHandler(Font f)
		{
			font = f;
		}
 
		public void itemStateChanged(ItemEvent event)
		{
			textField.setFont(font);
			if (font == loginFont)
			{
				Login.response1 = 1;
			}
			else if (font == registerFont)
			{
				Login.response1 = 2;
			}
			else if (font == exitFont)
			{
				Login.response1 = 3;
			}
		}
 
	}// end RadioButtonHandler
}// end NewLogin

1. yes of course I'm just trying to switch it over to a gui
2. will putting in a listener stop the rest of the program from running until it gets a response? or do I need to loop it in the background somehow until its got a working answer?

No, listeners do not stop the program.
You need to show the GUI to the user with listeners set for all the buttons etc and then exit the method that built the GUI. You do NOT put in a loop to wait for the answer. The JVM does that for you. When the user presses/selects/clicks on something, the JVM will call your listener and then your code reacts to what the user did.

Is there a Login class and a class with a main method so your code could be compiled and executed?

Originally Posted by Norm

Is there a Login class and a class with a main method so your code could be compiled and executed?

Yup. Look at the link I posted above its a jar file with working so far.

Sorry here is the source
Source
I have no idea if I'm setting this up 'properly' and I can't figure out why after you login it wont load the next window. It's just white on my computer. =/
As far as permissions go I have no clue how to even manage that stuff. I just told eclipse to make me a jar.

after you login it wont load the next window

What is the next piece of code that is executed after you login? Trace the logic flow from that point. Add printlns if you don't have an interactive debugger.

It heads over to CheckInfo, there it sees that it needs more info so it loads up NewCheckInfo class. But that class just freezes. I added println statements like you said and it will go until the end of public NewCheckInfo(int aP) method. But when it doesn't ever seem to get to public void actionPerformed(ActionEvent event). And thats because the user never enters information. Which is because the screen is just white and you cant! =/ so I have no clue why its doing that all of the sudden. Is there a problem with having to many methods inside methods with frames and what not? I don't really see how I could do it a different way..

But that class just freezes

What code called the NewCheckInfo constructor ( = new ...)
What happens after the constructor returns?

NewCheckInfo is called near the beginning of CheckInfo... Oh i forgot i changed it just to test something. I told it to call the login stuff again in CheckInfo lines 29-32. Before I did that it use to be:
So you could just replace 29-32 with this code, to see what I'm trying to do.
And its not returning anything specifically? I was just going to have it call another method once it got done. and move onto the next frame and what not.

                                NewCheckInfo newCheckInfoFrame = new NewCheckInfo(aP);
				newCheckInfoFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
				newCheckInfoFrame.setSize(400, 100); // set frame size
				newCheckInfoFrame.setVisible(true); // display frame

You've posted way too much code to look thru. I prefer working with a single source with ALL the code in one file.
And now I see that what is posted won't work.

The only thing I can suggest is to continue working thru the execution path until you find the problem.

If you find a problem and can create a small program that executes and demonstrates the problem post it with your questions.

I could probably help if the OP could post the relevant source code (the 'Source' link previously posted shows no code), and explain clearly what the problem is.

Also, I'd really like to know how to make the other frames disappear once I've collected the Users response. Any ideas how to set it up like this?

Have you tried using a modal dialog window to get data vs a Frame?

The program freezing may be some conflict with the way you executing code on the Swing event display thread (EDT).

Yes, a modal dialog windows would works just fine. But they are so ugly and unattractive with so minimal customization that it kind of defeats the point of making a GUI in the first place. Plus I wanted to be able to control the users response via GUI so that when I'm asking for menu options, they don't have to put in things like 1 or 2 or 3 as a selection, and then have to try catch everything just to make sure they don't put in a character etc.

hey are so ugly

Did you use the JDialog class for that? You should be able to have EXACTLY what you want.

I made these changes to NewLogin:

public class NewLoginDialog extends JDialog 
	public NewLoginDialog(Frame owner, String title, boolean modal)
	{
      super(owner, title, modal);
   ...
     NewLoginDialog nld = new NewLoginDialog(null, "New Login", true);  // for testing

Well I haven't heard of or seen JDialog before. But I tried the cod you provided in the program, and it works, except that the dialogbox wont let me work with the other jframes I already made.. It wont release control of the program anyway until its resolved. I'm guess if I changed all of them to dialogboxes like that one, they would take precedence over the first one.
But, what really is the difference between using these kinds of dialog boxes and the JFrames I was already using? Maybe it wont glitch like the other one did?

dialogbox wont let me work with the other jframes

That's what modal mode means.

Why would your design require having multiple windows open/displayed with any of them being alive for input? Seems like a strange design.

Yea true. I will try the dialog boxes, and see if it doesn't freeze anymore.

Wow it works! =D and it runs a lot smoother!
Thanks so much for showing me that