PainlessGridBagExample

This is a demo for building that screen by using painless-gridbag. It is not a layout manager. It is a utility (a set of convenient classes) that help simplify GUI's code using GridBagLayout. Here is the screenshot of the produced screen. It solves the tricky requirement on the "Fist name", "Email" and "Postal code" label!

Below is the full source code (as you can see, the layout code is much shorter)

package org.painlessgridbag;

import java.awt.Dimension;
import java.awt.GridBagConstraints;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

/**
 * @author Ho Tri Bao
 * 
 */
public class AddressBookDemo extends JFrame {
    JScrollPane scrPeople = new JScrollPane();
    private final JList lstPeople = new JList(new String[] {
            "Bunny, Bugs",
            "Cat, Sylvester",
            "Coyote, Wile E.",
            "Devil, Tasmanian",
            "Duck, Daffy",
            "Fudd, Elmer",
            "Le Pew, Pepe",
            "Martian, Marvin",
    });
    private final JTextField txtFirstName = new JTextField("Martian");
    private final JTextField txtLastName = new JTextField("Marvin");
    private final JTextField txtPhone = new JTextField("805-123-4567");
    private final JTextField txtEmail = new JTextField("marvin@wb.com");
    private final JTextField txtAdd1 = new JTextField("1001001010101 Martian Way");
    private final JTextField txtAdd2 = new JTextField("Suite 10111011");
    private final JTextField txtCity = new JTextField("Ventura");
    private final JTextField txtState = new JTextField("CA");
    private final JTextField txtPostal = new JTextField("93001");
    private final JTextField txtCountry = new JTextField("USA");
    private final JButton btnNew = new JButton("New");
    private final JButton btnDelete = new JButton("Delete");
    private final JButton btnEdit = new JButton("Edit");
    private final JButton btnSave = new JButton("Save");
    private final JButton btnCancel = new JButton("Cancel");

    // Because they are special-aligned labels :-)
    private final JLabel lblFirstName = new JLabel("First name");
    private final JLabel lblEmail = new JLabel("Email");
    private final JLabel lblPostal = new JLabel("Postal code");

    
    public AddressBookDemo() {
        super("Address book demo with painless-gridbag");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        initComponents();
        initLayout();
        
    }

    private void initComponents() {
        setPreferredSize(new Dimension(600, 309));
        setMinimumSize(new Dimension(600, 309));
        scrPeople.setViewportView(lstPeople);
    }

    private void initLayout() {
        PainlessGridbagConfiguration config = new PainlessGridbagConfiguration();
        // All JLabels have to be right-aligned.
        config.setAlignAllLabelsToRight(true);
        // Except these lables
        config.setLeftAlignLabels(new JLabel[] {lblFirstName, lblPostal, lblEmail});
        
        PainlessGridBag gbl = new PainlessGridBag(getContentPane(), config, false);
        gbl.row().cellYRemainder(scrPeople).fillXY().cell(newLbl("Last name")).cell(txtLastName).fillX().cellX(lblFirstName, 2).cell(txtFirstName).fillX();
        gbl.row().cell().cell(newLbl("Phone")).cell(txtPhone).fillX().cell(lblEmail).cellX(txtEmail, 2).fillX();
        gbl.row().cell().cell(newLbl("Address 1")).cellXRemainder(txtAdd1).fillX();
        gbl.row().cell().cell(newLbl("Address 2")).cellXRemainder(txtAdd2).fillX();
        gbl.row().cell().cell(newLbl("City")).cell(txtCity).fillX();
        gbl.row().cell().cell(newLbl("State")).cell(txtState).fillX().cellX(lblPostal, 2).cell(txtPostal).fillX();
        gbl.row().cell().cell(newLbl("Country")).cell(txtCountry).fillX();
        
        // Add button panel
        JPanel pnlButton = new JPanel();
        PainlessGridBag gblBtn = new PainlessGridBag(pnlButton, false);
        LayoutUtils.addButtonPanel(gblBtn, btnNew, btnDelete, btnEdit, btnSave, btnCancel);
        gblBtn.done();
        gbl.row().cell().cellXRemainder(pnlButton).fillX();

        // This is the trick in GridBagLayout which is used to push everything up.
        gbl.row().cell().cellXRemainder(new JPanel()).fillXY();
        
        // Adjust some spacings that don't meet the requirement.
        gbl.constraints(scrPeople).insets.bottom = config.getLastRowBottomSpacing();
        gbl.constraints(txtCity).insets.right = config.getVirticalSpacing();
        gbl.constraints(txtCountry).insets.right = config.getVirticalSpacing();
        gbl.constraints(pnlButton).insets.right = 0;
        gbl.constraints(lblFirstName).anchor = GridBagConstraints.LINE_START;
        
        gbl.done();
    }

    private JLabel newLbl(String lbl) {
        return new JLabel(lbl);
    }
    
    public static void main(final String[] args) {
        AddressBookDemo demo = new AddressBookDemo();
        demo.pack();
        demo.setVisible(true);
    }

}