Thread: Grid bag layout inside grid bag layout

As the subject suggests, I am attempting to put a grid bag layout inside another grid bag layout. It's turned out horribly wrong which you will see by running the code I have. What I want is to put the toppings panel in its own separate grid bag layout, but it is overlapping the rest of the GUI. I'm not really sure what the problem is.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
 
public class PizzaCalculator
{
 
    public static void main(String[] args)
    {
    	JFrame frame = new PizzaFrame();
    	frame.setVisible(true);
    }
 
}
 
class PizzaFrame extends JFrame
{
	public PizzaFrame()
	{
		setTitle("Pizza Calculator");
		setResizable(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JPanel panel = new PizzaPanel();
		this.add(panel);
		this.pack();
		centerWindow(this);
	}
 
	private void centerWindow(Window w)
	{
		Toolkit tk = Toolkit.getDefaultToolkit();
		Dimension d = tk.getScreenSize();
		setLocation((d.width-w.getWidth())/2, (d.height-w.getHeight())/2);
	}
}
 
class PizzaPanel extends JPanel implements ActionListener
{
	private JRadioButton 	smallPizzaRadioButton,
							mediumPizzaRadioButton,
							largePizzaRadioButton,
							clearRadioButton;
 
	private JCheckBox		sausageCheckBox,
							pepperoniCheckBox,
							salamiCheckBox,
							hamburgerCheckBox,
							olivesCheckBox,
							mushroomsCheckBox,
							peppersCheckBox,
							onionsCheckBox;
 
	private JTextField		priceTextField;
	private JLabel			priceLabel;
 
	private JButton			calculateButton,
							clearButton,
							exitButton;
 
	public PizzaPanel()
	{
		setLayout(new GridBagLayout());
 
		Border loweredBorder = BorderFactory.createEtchedBorder();
 
		// radio button panel
		JPanel radioPanel = new JPanel();
		ButtonGroup sizeGroup = new ButtonGroup();
        radioPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
        radioPanel.setBorder(BorderFactory.createTitledBorder(loweredBorder, "Size: "));
 
        // small pizza radio button
        smallPizzaRadioButton = new JRadioButton("Small Pizza");
        smallPizzaRadioButton.addActionListener(this);
        sizeGroup.add(smallPizzaRadioButton);
        radioPanel.add(smallPizzaRadioButton);
 
        // medium pizza radio button
 
		mediumPizzaRadioButton = new JRadioButton("Medium Pizza");
        mediumPizzaRadioButton.addActionListener(this);
        sizeGroup.add(mediumPizzaRadioButton);
        radioPanel.add(mediumPizzaRadioButton);
 
        // large pizza radio button
        largePizzaRadioButton = new JRadioButton("Large Pizza");
        largePizzaRadioButton.addActionListener(this);
        sizeGroup.add(largePizzaRadioButton);
        radioPanel.add(largePizzaRadioButton);
 
        // initialize radio button position
        clearRadioButton = new JRadioButton("Clear", true);
        clearRadioButton.addActionListener(this);
 
        add(radioPanel, getConstraints(0,0,3,1, GridBagConstraints.CENTER));
 
        /*************************************************************************************/
 
        /* THIS IS WHERE I ATTEMPT TO CREATE A NEW GRID BAG LAYOUT INSIDE THE CURRENT GBL */
 
        JPanel topPan = new JPanel();
        ButtonGroup toppingsGroup = new ButtonGroup();
        topPan.setLayout(new GridBagLayout());
        topPan.setBorder(BorderFactory.createTitledBorder(loweredBorder, "Toppings "));
        add(topPan, getConstraints(1,1,2,1, GridBagConstraints.CENTER));
 
 
        // sausage check box
		sausageCheckBox = new JCheckBox("Sausage");
		toppingsGroup.add(sausageCheckBox);
		topPan.add(sausageCheckBox);
		add(sausageCheckBox, getConstraints(0,0,1,1, GridBagConstraints.WEST));
 
		// pepperoni check box
		pepperoniCheckBox = new JCheckBox("Pepperoni");
		toppingsGroup.add(pepperoniCheckBox);
		topPan.add(pepperoniCheckBox);
		add(pepperoniCheckBox, getConstraints(0,1,1,1, GridBagConstraints.WEST));
 
		// salami check box
		salamiCheckBox = new JCheckBox("Salami");
		toppingsGroup.add(salamiCheckBox);
		topPan.add(salamiCheckBox);
		add(salamiCheckBox, getConstraints(0,2,1,1, GridBagConstraints.WEST));
 
		// hamburger check box
	    hamburgerCheckBox = new JCheckBox("Hamburger");
	    toppingsGroup.add(hamburgerCheckBox);
		topPan.add(hamburgerCheckBox);
	    add(hamburgerCheckBox, getConstraints(0,3,1,1, GridBagConstraints.WEST));
 
	    // olives check box
	    olivesCheckBox = new JCheckBox("Olives");
	    toppingsGroup.add(olivesCheckBox);
		topPan.add(olivesCheckBox);
	    add(olivesCheckBox, getConstraints(1,0,1,1, GridBagConstraints.WEST));
 
	    // mushrooms check box
	    mushroomsCheckBox = new JCheckBox("Mushrooms");
	    toppingsGroup.add(mushroomsCheckBox);
		topPan.add(mushroomsCheckBox);
	    add(mushroomsCheckBox, getConstraints(1,1,1,1, GridBagConstraints.WEST));
 
	    // peppers check box
	    peppersCheckBox = new JCheckBox("Peppers");
	    toppingsGroup.add(mushroomsCheckBox);
		topPan.add(mushroomsCheckBox);
	    add(peppersCheckBox, getConstraints(1,2,1,1, GridBagConstraints.WEST));
 
	    // onions check box
	    onionsCheckBox = new JCheckBox("Onions");
	    toppingsGroup.add(onionsCheckBox);
		topPan.add(onionsCheckBox);
	    add(onionsCheckBox, getConstraints(1,3,1,1, GridBagConstraints.WEST));
 
 
		/*************************************************************************/
 
        // price label
		priceLabel = new JLabel("Price:");
		add(priceLabel, getConstraints(0,2,1,1, GridBagConstraints.EAST));
 
		// price text field
		priceTextField = new JTextField(10);
		add(priceTextField, getConstraints(1,2,1,1, GridBagConstraints.WEST));
 
		// calculate button
		calculateButton = new JButton("Calculate");
		calculateButton.addActionListener(this);
		add(calculateButton, getConstraints(0,3,1,1, GridBagConstraints.CENTER));
 
		// clear button
		clearButton = new JButton("Clear");
		clearButton.addActionListener(this);
		add(clearButton, getConstraints(1,3,1,1, GridBagConstraints.CENTER));
 
		// exit button
		exitButton = new JButton("Clear");
		exitButton.addActionListener(this);
		add(exitButton, getConstraints(2,3,1,1, GridBagConstraints.CENTER));
 
	}
 
	// a method for setting grid bag constraints
	private GridBagConstraints getConstraints(int gridx, int gridy, int gridwidth, int gridheight, int anchor)
	{
		GridBagConstraints c = new GridBagConstraints();
		c.insets = new Insets(5, 5, 5, 5);
		c.ipadx = 0;
		c.ipady = 0;
		c.gridx = gridx;
		c.gridy = gridy;
		c.gridwidth = gridwidth;
		c.gridheight = gridheight;
		c.anchor = anchor;
		return c;
	}
 
	public void actionPerformed(ActionEvent e)
	{
	}
}

Can you kindly just post the code, with which you are having trouble, it's too odd to look through the whole. Thanks