MainPanel.java

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

package example;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;

public final class MainPanel extends JPanel {
  private MainPanel() {
    super(new BorderLayout());
    JTable table = makeTable();
    table.setComponentPopupMenu(makePopupMenu());

    JTabbedPane tabs = new JTabbedPane();
    tabs.addTab("JTable", new JScrollPane(table));
    tabs.addTab("JTree", new JScrollPane(new JTree()));
    tabs.addTab("JSplitPane", new JSplitPane());
    tabs.addTab("JButton", new JButton("button"));

    EventQueue.invokeLater(() -> {
      int modifiers = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
      // Java 10: int modifiers = Toolkit.getDefaultToolkit().getMenuShortcutKeyMaskEx();
      KeyStroke ks1 = KeyStroke.getKeyStroke(KeyEvent.VK_1, modifiers);
      tabs.getInputMap(WHEN_IN_FOCUSED_WINDOW).put(ks1, "prev1");
      tabs.getActionMap().put("prev1", new AbstractAction() {
        @Override public void actionPerformed(ActionEvent e) {
          int s = tabs.getTabCount();
          tabs.setSelectedIndex((tabs.getSelectedIndex() + s - 1) % s);
        }
      });

      KeyStroke ks2 = KeyStroke.getKeyStroke(KeyEvent.VK_2, modifiers);
      tabs.getInputMap(WHEN_FOCUSED).put(ks2, "next1");
      tabs.getActionMap().put("next1", new AbstractAction() {
        @Override public void actionPerformed(ActionEvent e) {
          tabs.setSelectedIndex((tabs.getSelectedIndex() + 1) % tabs.getTabCount());
        }
      });

      KeyStroke ks3 = KeyStroke.getKeyStroke(KeyEvent.VK_3, modifiers);
      tabs.getInputMap(WHEN_IN_FOCUSED_WINDOW).put(ks3, "prev2");
      tabs.getActionMap().put("prev2", new AbstractAction() {
        @Override public void actionPerformed(ActionEvent e) {
          int pressed = MouseEvent.MOUSE_PRESSED;
          tabs.dispatchEvent(new MouseEvent(tabs, pressed, 0, 0, 0, 0, 1, false));
          int s = tabs.getTabCount();
          tabs.setSelectedIndex((tabs.getSelectedIndex() + s - 1) % s);
        }
      });

      KeyStroke ks4 = KeyStroke.getKeyStroke(KeyEvent.VK_4, modifiers);
      tabs.getInputMap(WHEN_IN_FOCUSED_WINDOW).put(ks4, "next2");
      tabs.getActionMap().put("next2", new AbstractAction() {
        @Override public void actionPerformed(ActionEvent e) {
          for (MenuElement m : MenuSelectionManager.defaultManager().getSelectedPath()) {
            if (m instanceof JPopupMenu) {
              ((JPopupMenu) m).setVisible(false);
            }
          }
          tabs.setSelectedIndex((tabs.getSelectedIndex() + 1) % tabs.getTabCount());
        }
      });
    });

    add(tabs);
    setPreferredSize(new Dimension(320, 240));
  }

  private static JTable makeTable() {
    String[] columnNames = {"String", "Integer", "Boolean"};
    Object[][] data = {
        {"prev1: Ctrl+1", 1, true}, {"next1: Ctrl+2", 2, false},
        {"prev2: Ctrl+3", 3, true}, {"next2: Ctrl+4", 4, false}
    };
    TableModel model = new DefaultTableModel(data, columnNames) {
      @Override public Class<?> getColumnClass(int column) {
        return getValueAt(0, column).getClass();
      }
    };
    return new JTable(model) {
      @Override public void updateUI() {
        super.updateUI();
        setFillsViewportHeight(true);
        setAutoCreateRowSorter(true);
      }
    };
  }

  private static JPopupMenu makePopupMenu() {
    JMenu menu = new JMenu("Sub");
    menu.add("Item 1");
    menu.add("Item 2");
    JPopupMenu popup = new JPopupMenu();
    popup.add(menu);
    popup.add("Table Item 1");
    popup.add("Table Item 2");
    popup.add("Table Item 3");
    return popup;
  }

  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);
  }
}