A quick demonstration of checkbox menu items
/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// CheckBoxMenuItemExample.java
// A quick demonstration of checkbox menu items.
//
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.JToolBar;
import javax.swing.KeyStroke;
import javax.swing.border.BevelBorder;
public class CheckBoxMenuItemExample extends JPanel {
public JTextPane pane;
public JMenuBar menuBar;
public JToolBar toolBar;
public CheckBoxMenuItemExample() {
menuBar = new JMenuBar();
JMenu justifyMenu = new JMenu("Justify");
ActionListener actionPrinter = new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
pane.getStyledDocument().insertString(
0,
"Action [" + e.getActionCommand()
+ "] performed!\n", null);
} catch (Exception ex) {
ex.printStackTrace();
}
}
};
JCheckBoxMenuItem leftJustify = new JCheckBoxMenuItem("Left",
new ImageIcon("1.gif"));
leftJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
leftJustify.setAccelerator(KeyStroke.getKeyStroke('L', Toolkit
.getDefaultToolkit().getMenuShortcutKeyMask()));
leftJustify.addActionListener(actionPrinter);
JCheckBoxMenuItem rightJustify = new JCheckBoxMenuItem("Right",
new ImageIcon("2.gif"));
rightJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
rightJustify.setAccelerator(KeyStroke.getKeyStroke('R', Toolkit
.getDefaultToolkit().getMenuShortcutKeyMask()));
rightJustify.addActionListener(actionPrinter);
JCheckBoxMenuItem centerJustify = new JCheckBoxMenuItem("Center",
new ImageIcon("3.gif"));
centerJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
centerJustify.setAccelerator(KeyStroke.getKeyStroke('M', Toolkit
.getDefaultToolkit().getMenuShortcutKeyMask()));
centerJustify.addActionListener(actionPrinter);
JCheckBoxMenuItem fullJustify = new JCheckBoxMenuItem("Full",
new ImageIcon("4.gif"));
fullJustify.setHorizontalTextPosition(JMenuItem.RIGHT);
fullJustify.setAccelerator(KeyStroke.getKeyStroke('F', Toolkit
.getDefaultToolkit().getMenuShortcutKeyMask()));
fullJustify.addActionListener(actionPrinter);
justifyMenu.add(leftJustify);
justifyMenu.add(rightJustify);
justifyMenu.add(centerJustify);
justifyMenu.add(fullJustify);
menuBar.add(justifyMenu);
menuBar.setBorder(new BevelBorder(BevelBorder.RAISED));
}
public static void main(String s[]) {
CheckBoxMenuItemExample example = new CheckBoxMenuItemExample();
example.pane = new JTextPane();
example.pane.setPreferredSize(new Dimension(250, 250));
example.pane.setBorder(new BevelBorder(BevelBorder.LOWERED));
JFrame frame = new JFrame("Menu Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setJMenuBar(example.menuBar);
frame.getContentPane().add(example.pane, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}
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