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MainPanel.java
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MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.swing.*;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new GridLayout(1, 2, 5, 5));
JPanel p1 = new JPanel();
p1.setBorder(BorderFactory.createTitledBorder("left"));
p1.add(new JTextField(16));
p1.add(new JTextField(16));
p1.add(new JTextField(16));
p1.add(new JTextField(16));
p1.add(new JTextField(16));
p1.add(new JTextField(16));
// p1.setFocusTraversalPolicyProvider(true);
p1.setFocusCycleRoot(true);
JPanel p2 = new JPanel();
p2.setBorder(BorderFactory.createTitledBorder("right"));
p2.add(new JTextField(16));
p2.add(new JTextField(16));
p2.add(new JTextField(16));
p2.add(new JTextField(16));
p2.add(new JTextField(16));
p2.add(new JTextField(16));
p2.setFocusTraversalPolicyProvider(true);
p2.setFocusCycleRoot(true);
p2.setFocusTraversalKeys(
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
Collections.emptySet());
p2.setFocusTraversalKeys(
KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
makeKeyStrokeSet(KeyStroke.getKeyStroke(KeyEvent.VK_TAB, InputEvent.SHIFT_DOWN_MASK)));
p2.setFocusTraversalKeys(
KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
makeKeyStrokeSet(KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0)));
add(p1);
// p1.add(p2);
add(p2);
setPreferredSize(new Dimension(320, 240));
}
private static Set<AWTKeyStroke> makeKeyStrokeSet(KeyStroke keyStroke) {
return new HashSet<>(Collections.singletonList(keyStroke));
}
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);
}
}