MainPanel.java

// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@

package example;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableModel;

public final class MainPanel extends JPanel {
  private MainPanel() {
    super(new BorderLayout());
    String[] columnNames = {"String", "Integer", "Boolean"};
    Object[][] data = {
        {"aaa", 12, true}, {"bbb", 5, false}, {"CCC", 92, true}, {"DDD", 0, false}
    };
    TableModel model = new DefaultTableModel(data, columnNames) {
      @Override public Class<?> getColumnClass(int column) {
        return getValueAt(0, column).getClass();
      }
    };
    JTable table = new JTable(model) {
      private final Color evenColor = new Color(0xFA_FA_FA);
      @Override public Component prepareRenderer(TableCellRenderer tcr, int row, int column) {
        Component c = super.prepareRenderer(tcr, row, column);
        if (isCellSelected(row, column)) {
          c.setForeground(getSelectionForeground());
          c.setBackground(getSelectionBackground());
        } else {
          c.setForeground(getForeground());
          c.setBackground(row % 2 == 0 ? evenColor : getBackground());
        }
        return c;
      }
    };
    table.setCellSelectionEnabled(true);

    JCheckBox check = new JCheckBox("Header click: Select all cells in a column", true);

    JTableHeader header = table.getTableHeader();
    header.addMouseListener(new MouseAdapter() {
      @Override public void mousePressed(MouseEvent e) {
        if (!check.isSelected()) {
          return;
        }
        if (table.isEditing()) {
          table.getCellEditor().stopCellEditing();
        }
        int col = header.columnAtPoint(e.getPoint());
        table.changeSelection(0, col, false, false);
        table.changeSelection(table.getRowCount() - 1, col, false, true);
      }
    });

    JButton button = new JButton("clear selection");
    button.addActionListener(e -> table.clearSelection());

    // table.getTableHeader().addMouseListener(new MouseAdapter() {
    //   @Override public void mousePressed(MouseEvent e) {
    //     JTable table = ((JTableHeader) e.getSource()).getTable();
    //     if (table.isEditing()) {
    //       table.getCellEditor().stopCellEditing();
    //     }
    //     if (check.isSelected()) {
    //       // table.getSelectionModel().clearSelection();
    //       // table.getSelectionModel().setAnchorSelectionIndex(-1);
    //       // table.getSelectionModel().setLeadSelectionIndex(-1);
    //       table.getColumnModel().getSelectionModel().setAnchorSelectionIndex(-1);
    //       table.getColumnModel().getSelectionModel().setLeadSelectionIndex(-1);
    //     }
    //   }
    // });

    add(check, BorderLayout.NORTH);
    add(new JScrollPane(table));
    add(button, BorderLayout.SOUTH);
    setPreferredSize(new Dimension(320, 240));
  }

  public static void main(String[] args) {
    EventQueue.invokeLater(MainPanel::createAndShowGui);
  }

  private static void createAndShowGui() {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (UnsupportedLookAndFeelException ignored) {
      Toolkit.getDefaultToolkit().beep();
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
      ex.printStackTrace();
      return;
    }
    JFrame frame = new JFrame("@title@");
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.getContentPane().add(new MainPanel());
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}