JavaGridBagLayout

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.TextArea;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListSelectionModel;

public class LogView extends JPanel {

    private JLabel titleLabel;

    public LogView(final JFrame contentPane) {

        JPanel mainPanel = new JPanel();

        titleLabel = new JLabel("Logging Information");
        // titleLabel.setPreferredSize(new Dimension(600,50));

        mainPanel.setLayout(new GridBagLayout());
        GridBagConstraints constraints = new GridBagConstraints();

        String[] tempstuff = { "Active", "ALL", "Stuff" };
        JComboBox stageList = new JComboBox(tempstuff);
        stageList.setSelectedIndex(0);

        List s = new ArrayList();
        s.add("test1");
        s.add("test2");
        JList orderJList = new JList();
        orderJList.setListData(s.toArray());
        orderJList
                .setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);

        TextArea orderViewArea = new TextArea();
        orderViewArea.setEditable(false);
        orderViewArea.setText("Log stuff:\n Pizza\n Rochester\n stuff");

        constraints.insets = new Insets(10, 10, 10, 10);
        constraints.weighty = 0;
        constraints.gridx = 0;
        constraints.gridy = 0;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        mainPanel.add(titleLabel, constraints);

        constraints.weighty = 0;
        constraints.gridx = 0;
        constraints.gridy = 1;
        constraints.fill = GridBagConstraints.HORIZONTAL;
        mainPanel.add(stageList, constraints);

        constraints.weighty = 1;
        constraints.gridx = 0;
        constraints.gridy = 2;
        constraints.fill = GridBagConstraints.BOTH;
        mainPanel.add(orderJList, constraints);

        constraints.gridx = 1;
        constraints.gridy = 1;
        constraints.gridheight = 2;
        constraints.ipady = 5;
        constraints.weighty = 1;
        constraints.fill = GridBagConstraints.BOTH;
        mainPanel.add(orderViewArea, constraints);

        add(mainPanel);
    }

    public static void main(String args[]) {
        JFrame gui = new JFrame("ActiveOrderViewTest");
        LogView aov = new LogView(gui);
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.add(aov);
        gui.pack();
        gui.setVisible(true);
    }

}