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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 javax.swing.*;
import javax.swing.plaf.BorderUIResource;
import javax.swing.plaf.basic.BasicPopupMenuUI;
import javax.swing.tree.DefaultTreeCellRenderer;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
JTree tree0 = new JTree();
tree0.setComponentPopupMenu(initPopupMenu(new JPopupMenu()));
JTree tree1 = makeTree();
tree1.setComponentPopupMenu(initPopupMenu(makePopupMenu()));
JTree tree2 = makeTree();
tree2.setComponentPopupMenu(initPopupMenu(new DarkModePopupMenu()));
JTabbedPane tabs = new JTabbedPane();
tabs.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
tabs.addTab("Default", new JScrollPane(tree0));
tabs.addTab("setBackground(...)", new JScrollPane(tree1));
tabs.addTab("BasicPopupMenuUI", new JScrollPane(tree2));
tabs.setSelectedIndex(tabs.getTabCount() - 1);
add(tabs);
JMenuBar mb = new JMenuBar();
mb.add(LookAndFeelUtils.createLookAndFeelMenu());
EventQueue.invokeLater(() -> getRootPane().setJMenuBar(mb));
setPreferredSize(new Dimension(320, 240));
}
private JTree makeTree() {
return new JTree() {
@Override public void updateUI() {
setCellRenderer(null);
super.updateUI();
DefaultTreeCellRenderer r = new DefaultTreeCellRenderer();
r.setTextNonSelectionColor(Color.WHITE);
r.setBackgroundNonSelectionColor(Color.DARK_GRAY);
// r.setTextSelectionColor(Color.RED);
// r.setBackgroundSelectionColor(Color.GREEN);
// r.setForeground(Color.BLUE);
// r.setBackground(Color.PINK);
setCellRenderer(r);
setBackground(Color.DARK_GRAY);
setForeground(Color.WHITE);
}
};
}
private JPopupMenu makePopupMenu() {
// UIManager.put("PopupMenu.border", BorderFactory.createLineBorder(Color.LIGHT_GRAY));
// UIManager.put("PopupMenu.background", Color.DARK_GRAY);
// UIManager.put("PopupMenu.foreground", Color.WHITE);
// UIManager.put("MenuItem.foreground", Color.WHITE);
// UIManager.put("CheckBoxMenuItem.foreground", Color.WHITE);
// UIManager.put("RadioButtonMenuItem.foreground", Color.WHITE);
// UIManager.put("MenuItem.background", Color.DARK_GRAY);
// UIManager.put("CheckBoxMenuItem.background", Color.DARK_GRAY);
// UIManager.put("RadioButtonMenuItem.background", Color.DARK_GRAY);
return new JPopupMenu() {
@Override public void updateUI() {
super.updateUI();
// setUI(new BasicPopupMenuUI());
setBackground(Color.DARK_GRAY);
setBorder(new BorderUIResource(BorderFactory.createLineBorder(Color.LIGHT_GRAY)));
EventQueue.invokeLater(() -> {
for (MenuElement m : getSubElements()) {
Component c = m.getComponent();
c.setForeground(Color.WHITE);
// for Metal, Windows Classic LookAndFeel
((JComponent) c).setOpaque(false);
}
});
}
};
}
private static JPopupMenu initPopupMenu(JPopupMenu popup) {
popup.add("Cut");
popup.add("Copy");
popup.add("Paste");
popup.add("Delete");
popup.addSeparator();
popup.add(new JCheckBoxMenuItem("JCheckBoxMenuItem"));
popup.add(new JRadioButtonMenuItem("JRadioButtonMenuItem"));
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);
}
}
final class DarkModePopupMenu extends JPopupMenu {
@Override public void updateUI() {
super.updateUI();
setUI(new BasicPopupMenuUI());
setBackground(Color.DARK_GRAY);
setBorder(new BorderUIResource(BorderFactory.createLineBorder(Color.LIGHT_GRAY)));
EventQueue.invokeLater(() -> {
for (MenuElement m : getSubElements()) {
Component c = m.getComponent();
c.setForeground(Color.WHITE);
// for Metal, Windows Classic LookAndFeel
((JComponent) c).setOpaque(false);
}
});
}
// @Override protected void paintComponent(Graphics g) {
// Graphics2D g2 = (Graphics2D) g.create();
// g2.setPaint(Color.DARK_GRAY);
// g2.fillRect(0, 0, getWidth(), getHeight());
// g2.dispose();
// }
}
final class LookAndFeelUtils {
private static String lookAndFeel = UIManager.getLookAndFeel().getClass().getName();
private LookAndFeelUtils() {
/* Singleton */
}
public static JMenu createLookAndFeelMenu() {
JMenu menu = new JMenu("LookAndFeel");
ButtonGroup buttonGroup = new ButtonGroup();
for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
AbstractButton b = makeButton(info);
initLookAndFeelAction(info, b);
menu.add(b);
buttonGroup.add(b);
}
return menu;
}
private static AbstractButton makeButton(UIManager.LookAndFeelInfo info) {
boolean selected = info.getClassName().equals(lookAndFeel);
return new JRadioButtonMenuItem(info.getName(), selected);
}
public static void initLookAndFeelAction(UIManager.LookAndFeelInfo info, AbstractButton b) {
String cmd = info.getClassName();
b.setText(info.getName());
b.setActionCommand(cmd);
b.setHideActionText(true);
b.addActionListener(e -> setLookAndFeel(cmd));
}
private static void setLookAndFeel(String newLookAndFeel) {
String oldLookAndFeel = lookAndFeel;
if (!oldLookAndFeel.equals(newLookAndFeel)) {
try {
UIManager.setLookAndFeel(newLookAndFeel);
lookAndFeel = newLookAndFeel;
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
updateLookAndFeel();
// firePropertyChange("lookAndFeel", oldLookAndFeel, newLookAndFeel);
}
}
private static void updateLookAndFeel() {
for (Window window : Window.getWindows()) {
SwingUtilities.updateComponentTreeUI(window);
}
}
}