Need help with GridBagLayout (or layouts in general)

Question

I'm trying to make a layout like this:
|--------------------------------------------------------|-----------|
|                                                        |           |
|             display                                    |           |
|                                                        |           |
|                                                        | control   |
|                                                        |           |
|                                                        |           |
|                                                        |           |
|--------------------------------------------------------|           |
|                 info                                   |           |
|--------------------------------------------------------|-----------|and I can't get it to work.
This is as far as I have gotten (and no, Netbeans can't help me :(, or I don't know how to make it help me)
* MainFrame.java
* Created on February 2, 2008, 1:30 AM
package TowerDefense.Visual;
import TowerDefense.Maps.sampleMap;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
* @author  jerome
public class MainFrame extends javax.swing.JFrame implements ActionListener {
    private JPanel mainPanel = new JPanel();
        private JPanel display = new JPanel();
        private JPanel infoPane = new JPanel();
        private JPanel controlPane = new JPanel();
    private JMenuBar menuBar = new JMenuBar();
    private JMenu file = new JMenu("File");
        private JMenuItem mnuExit = new JMenuItem("Exit");
    private JMenu edit = new JMenu("Edit");
        private JMenu miMaps = new JMenu("Maps");
            private JMenuItem sampleMap = new JMenuItem("Sample Map");
    /** Creates new form MainFrame */
    public MainFrame() {
        this.setSize(800,600);
         * Menu bars
        this.setJMenuBar(menuBar);
        menuBar.add(file);
            file.add(mnuExit);
            mnuExit.addActionListener(this);
        menuBar.add(edit);
            edit.add(miMaps);
                miMaps.add(sampleMap);
                sampleMap.addActionListener(this);
        //construction of layout
        this.setLayout(new BorderLayout());
        this.add(mainPanel, BorderLayout.CENTER);
        mainPanel.setLayout(new GridBagLayout());
        GridBagConstraints c =new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        c.anchor = GridBagConstraints.CENTER; 
        c.gridx = 0;
        c.gridy = 0;    
        c.weightx = 3;
        c.weighty = 2;
        mainPanel.add(display, c);
        c =new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 1;
        c.fill = java.awt.GridBagConstraints.HORIZONTAL;
        c.ipady = 1;
        c.anchor = java.awt.GridBagConstraints.EAST;
        mainPanel.add(controlPane, c);
        c =new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        mainPanel.add(infoPane, c);
        //testing display
        infoPane.setBackground(Color.YELLOW);
        controlPane.setBackground(Color.RED);
        display.setBackground(Color.GREEN);
    public void actionPerformed(ActionEvent arg0) {
        Object o = arg0.getSource();
        if(mnuExit.equals(o))
            System.exit(1);
}

Answer 1

a lot depends on how you want the areas resized when/if the frame is resized
here's one possible approach
import java.awt.*;
import javax.swing.*;
class MainFrame extends javax.swing.JFrame
  private JPanel display = new JPanel();
  private JPanel infoPane = new JPanel();
  private JPanel controlPane = new JPanel();
  public MainFrame()
    infoPane.setBackground(Color.YELLOW);
    controlPane.setBackground(Color.RED);
    display.setBackground(Color.GREEN);
    JSplitPane spt1= new JSplitPane(JSplitPane.VERTICAL_SPLIT,display,infoPane);
    spt1.setResizeWeight(.8);
    spt1.setEnabled(false);
    spt1.setDividerSize(0);
    JSplitPane spt2= new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,spt1,controlPane);
    spt2.setResizeWeight(.7);
    spt2.setEnabled(false);
    spt2.setDividerSize(0);
    getContentPane().add(spt2);
    setSize(800,600);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLocationRelativeTo(null);
    setVisible(true);
  public static void main(String[] args)
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new MainFrame();
}