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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.ItemEvent;
import java.awt.event.KeyEvent;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Stream;
import javax.swing.*;
public final class MainPanel extends JPanel {
private static final int OFFSET = 30;
private static final AtomicInteger OPEN_COUNTER = new AtomicInteger();
private MainPanel() {
super(new BorderLayout());
JDesktopPane desktop = new JDesktopPane();
// @see javax/swing/DefaultDesktopManager.java setupDragMode(...)
// desktop.putClientProperty("JDesktopPane.dragMode", "faster");
// desktop.putClientProperty("JDesktopPane.dragMode", "outline");
desktop.add(createInternalFrame());
JRadioButton r1 = new JRadioButton("LIVE_DRAG_MODE", true);
r1.addItemListener(e -> {
if (e.getStateChange() == ItemEvent.SELECTED) {
desktop.setDragMode(JDesktopPane.LIVE_DRAG_MODE);
}
});
JRadioButton r2 = new JRadioButton("OUTLINE_DRAG_MODE");
r2.addItemListener(e -> {
if (e.getStateChange() == ItemEvent.SELECTED) {
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
}
});
JPanel p = new JPanel();
ButtonGroup bg = new ButtonGroup();
Stream.of(r1, r2).forEach(r -> {
bg.add(r);
p.add(r);
});
JMenu menu = new JMenu("Window");
menu.setMnemonic(KeyEvent.VK_W);
JMenuItem menuItem = menu.add("New");
menuItem.setMnemonic(KeyEvent.VK_N);
menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.ALT_DOWN_MASK));
menuItem.setActionCommand("new");
menuItem.addActionListener(e -> desktop.add(createInternalFrame()));
JMenuBar menuBar = new JMenuBar();
menuBar.add(menu);
EventQueue.invokeLater(() -> getRootPane().setJMenuBar(menuBar));
add(desktop);
add(p, BorderLayout.SOUTH);
setPreferredSize(new Dimension(320, 240));
}
private static JInternalFrame createInternalFrame() {
String title = String.format("Document #%s", OPEN_COUNTER.getAndIncrement());
JInternalFrame f = new JInternalFrame(title, true, true, true, true);
f.getContentPane().add(new JScrollPane(new JTree()));
f.setSize(160, 100);
f.setLocation(OFFSET * OPEN_COUNTER.intValue(), OFFSET * OPEN_COUNTER.intValue());
EventQueue.invokeLater(() -> f.setVisible(true));
return f;
}
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);
}
}