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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.ActionListener;
import java.util.Objects;
import java.util.stream.Stream;
import javax.swing.*;
public final class MainPanel extends JPanel {
private final JTextArea textArea = new JTextArea();
private final JCheckBox check1 = new JCheckBox();
private final JCheckBox check2 = new JCheckBox();
private MainPanel() {
super(new BorderLayout());
append("MainPanel: init");
// updateCheckBox("MainPanel: init");
UIManager.addPropertyChangeListener(e -> {
if (Objects.equals("lookAndFeel", e.getPropertyName())) {
// String lnf = e.getNewValue().toString();
updateCheckBox("UIManager: propertyChange");
}
});
EventQueue.invokeLater(() -> {
ActionListener al = e -> {
append("JMenuItem: actionPerformed");
Object o = e.getSource();
if (o instanceof JRadioButtonMenuItem && ((JRadioButtonMenuItem) o).isSelected()) {
updateCheckBox("JMenuItem: actionPerformed: invokeLater");
}
};
JMenuBar menuBar = new JMenuBar();
menuBar.add(LookAndFeelUtils.createLookAndFeelMenu());
getRootPane().setJMenuBar(menuBar);
descendants(menuBar)
.filter(JRadioButtonMenuItem.class::isInstance)
.map(JRadioButtonMenuItem.class::cast)
.forEach(mi -> mi.addActionListener(al));
});
String key1 = TreeDraws.DRAWS_FOCUS_BORDER_AROUND_ICON.toString();
check1.setText(key1);
check1.setSelected(UIManager.getBoolean(key1));
check1.addActionListener(e -> {
JCheckBox c = (JCheckBox) e.getSource();
UIManager.put(key1, c.isSelected());
SwingUtilities.updateComponentTreeUI(c.getRootPane());
});
String key2 = TreeDraws.DRAW_DASHED_FOCUS_INDICATOR.toString();
check2.setText(key2);
check2.setSelected(UIManager.getBoolean(key2));
check2.addActionListener(e -> {
JCheckBox c = (JCheckBox) e.getSource();
UIManager.put(key2, c.isSelected());
SwingUtilities.updateComponentTreeUI(c.getRootPane());
});
JPanel p = new JPanel(new GridLayout(2, 1)) {
@Override public void updateUI() {
super.updateUI();
check1.setSelected(UIManager.getBoolean(key1));
check2.setSelected(UIManager.getBoolean(key2));
}
};
p.add(new JScrollPane(new JTree()));
p.add(new JScrollPane(textArea));
JPanel np = new JPanel(new GridLayout(2, 1));
np.add(check1);
np.add(check2);
add(np, BorderLayout.NORTH);
add(p);
setPreferredSize(new Dimension(320, 240));
}
@Override public void updateUI() {
super.updateUI();
// System.out.println("JPanel: updateUI");
updateCheckBox("JPanel: updateUI: invokeLater");
}
// public static void searchAllMenuElements(MenuElement me, List<JRadioButtonMenuItem> list) {
// if (me instanceof JRadioButtonMenuItem) {
// list.add((JRadioButtonMenuItem) me);
// }
// MenuElement[] sub = me.getSubElements();
// if (sub.length != 0) {
// for (MenuElement e : sub) {
// searchAllMenuElements(e, list);
// }
// }
// }
// private static Stream<MenuElement> descendantOrSelf(MenuElement me) {
// return Stream.of(me.getSubElements())
// .map(MainPanel::descendantOrSelf).reduce(Stream.of(me), Stream::concat);
// }
private static Stream<MenuElement> descendants(MenuElement me) {
return Stream.of(me.getSubElements())
.flatMap(m -> Stream.concat(Stream.of(m), descendants(m)));
}
private void updateCheckBox(String str) {
EventQueue.invokeLater(() -> {
append("--------\n" + str);
String focusKey = TreeDraws.DRAWS_FOCUS_BORDER_AROUND_ICON.toString();
append(focusKey + ": " + UIManager.getBoolean(focusKey));
check1.setSelected(UIManager.getBoolean(focusKey));
String dashedKey = TreeDraws.DRAW_DASHED_FOCUS_INDICATOR.toString();
append(dashedKey + ": " + UIManager.getBoolean(dashedKey));
check2.setSelected(UIManager.getBoolean(dashedKey));
});
}
private void append(String str) {
textArea.append(str + "\n");
}
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);
}
// private static class ActionCheckBox extends JCheckBox {
// protected ActionCheckBox(TreeDraws key) {
// super(key.toString());
// setAction(new AbstractAction(key.toString()) {
// @Override public void actionPerformed(ActionEvent e) {
// JCheckBox c = (JCheckBox) e.getSource();
// UIManager.put(key.toString(), c.isSelected());
// SwingUtilities.updateComponentTreeUI(c.getRootPane());
// }
// });
// }
// }
}
enum TreeDraws {
DRAWS_FOCUS_BORDER_AROUND_ICON("Tree.drawsFocusBorderAroundIcon"),
DRAW_DASHED_FOCUS_INDICATOR("Tree.drawDashedFocusIndicator");
private final String key;
/* default */ TreeDraws(String key) {
this.key = key;
}
@Override public String toString() {
return key;
}
}
// @see SwingSet3/src/com/sun/swingset3/SwingSet3.java
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);
}
}
}