TablePanel (retrieved via web.archive.org)

TablePanel.java

import javax.swing.*;
import javax.swing.event.TableColumnModelListener;
import javax.swing.event.TableColumnModelEvent;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ListSelectionEvent;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.DefaultTableColumnModel;
import java.awt.*;

/**
 * Created by IntelliJ IDEA.
 * User: Behrang Saeedzadeh
 * Date: Jul 28, 2003
 * Time: 5:14:43 PM
 * To change this template use Options | File Templates.
 */
public class TablePanel extends JPanel
{
    private JTable table;
    private int[][] footerSpan;
    private JTableHeader header;
    private JTableHeader footer;
    private FooterAdjuster adjuster;

    public TablePanel(JTable table, int[][] footerSpan) {
        this.table = table;
        this.footerSpan = footerSpan;
        footer = new JTableHeader();
        header = table.getTableHeader();
        adjuster = new FooterAdjuster();

        header.setReorderingAllowed(false);

        setLayout(new BorderLayout());
        add(table, BorderLayout.CENTER);
        add(footer, BorderLayout.SOUTH);
        add(header, BorderLayout.NORTH);

        initFooter();

        table.getColumnModel().addColumnModelListener(adjuster);
    }

    public TablePanel() {
        this(new JTable(), new int[][]{});
    }

    private void initFooter() {
        DefaultTableColumnModel colModel = new DefaultTableColumnModel();
        for (int i = 0; i < footerSpan.length; i++) {
            TableColumn column = new TableColumn();
            colModel.addColumn(column);
        }
        footer.setColumnModel(colModel);
        footer.setResizingAllowed(false);
        footer.setReorderingAllowed(false);
    }

    public void setFooterValue(int index, Object value) {
        DefaultTableColumnModel colModel = (DefaultTableColumnModel) footer.getColumnModel();
        TableColumn col = colModel.getColumn(index);
        col.setHeaderValue(value);
    }

    public Object getFooterValue(int index) {
        DefaultTableColumnModel colModel = (DefaultTableColumnModel) footer.getColumnModel();
        TableColumn col = colModel.getColumn(index);
        return col.getHeaderValue();
    }

    public JTable getTable() {
        return table;
    }

    public Dimension getPreferredSize() {
    int height = 0, width = 0;
        if (table != null) {
            height =  header.getPreferredSize().height + table.getPreferredSize().height;
            height += footer.getPreferredSize().height;
            width = Math.max(table.getTableHeader().getPreferredSize().width, table.getPreferredSize().width);
            return new Dimension(width, height);
        } else {
            return new Dimension(0, 0);
        }
    }

    public java.awt.Dimension getMaximumSize() {
        Dimension maxDim = super.getMaximumSize();
        Dimension prefDim = getPreferredSize();
        Dimension dim = new Dimension();
        dim.width = maxDim.width;
        dim.height = prefDim.height;
        return dim;
    }

    public java.awt.Dimension getMinimumSize() {
        return getPreferredSize();
    }

    private class FooterAdjuster implements TableColumnModelListener
    {
        public void columnAdded(TableColumnModelEvent e) {
            adjust();
        }

        public void columnRemoved(TableColumnModelEvent e) {
            adjust();
        }

        public void columnMoved(TableColumnModelEvent e) {
            adjust();
        }

        public void columnMarginChanged(ChangeEvent e) {
            adjust();
        }

        public void columnSelectionChanged(ListSelectionEvent e) {
        }

        private void adjust() {
            for (int i = 0; i < footerSpan.length; i++) {
                int width = 0;
                for (int j = 0; j < footerSpan[i].length; j++) {
                    TableColumn tableCol = table.getColumnModel().getColumn(footerSpan[i][j]);
                    width += tableCol.getWidth();
                }
                TableColumn footerCol = footer.getColumnModel().getColumn(i);
                footerCol.setWidth(width);
            }
        }
    }
}