Demonstrate JMenu shortcuts and accelerators
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.awt.Container;
import java.awt.Event;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
/**
* Demonstrate JMenu shortcuts and accelerators.
*
* @author Ian Darwin, http://www.darwinsys.com/
* @version $Id: MenuShortcuts.java,v 1.4 2004/02/09 03:33:50 ian Exp $
*/
public class MenuShortcuts extends JFrame implements ActionListener {
/** The menubar */
JMenuBar mb;
/** File, Options, Help */
JMenu fm, om, hm;
/** Options Sub-JMenu */
JMenu opSubm;
/** The JMenuItem for exiting. */
JMenuItem exitItem;
// Constructor
MenuShortcuts(String s) {
super("JMenuShortcuts: " + s);
mb = new JMenuBar();
setJMenuBar(mb); // Frame implements JMenuContainer
Container cp = getContentPane();
JMenuItem mi;
// The File JMenu...
fm = new JMenu("File");
fm.setMnemonic('F');
fm.add(mi = new JMenuItem("Open", 'O'));
mi.addActionListener(this);
fm.add(mi = new JMenuItem("Close", 'W'));
mi.addActionListener(this);
fm.addSeparator();
fm.add(mi = new JMenuItem("Print", 'P'));
mi
.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R,
Event.ALT_MASK));
mi.addActionListener(this);
fm.addSeparator();
fm.add(mi = new JMenuItem("Exit", 'Q'));
exitItem = mi; // save for action handler
mi.addActionListener(this);
mb.add(fm);
// The Options JMenu...
om = new JMenu("Options");
om.add(new JMenuItem("Alpha"));
om.add(new JMenuItem("Gamma"));
om.add(new JMenuItem("Delta"));
mb.add(om);
// The Help JMenu...
hm = new JMenu("Help");
hm.add(mi = new JMenuItem("About"));
mi.addActionListener(this);
hm.add(mi = new JMenuItem("Topics"));
mi.addActionListener(this);
mb.add(hm);
// mb.setHelpMenu(hm); // needed for portability (Motif, etc.).
// the main window
cp.add(new Label("Menu Demo Window", 200, 150));
pack();
}
/** Handle action events. */
public void actionPerformed(ActionEvent evt) {
// System.out.println("Event " + evt);
String cmd;
if ((cmd = evt.getActionCommand()) == null)
System.out.println("You chose a menu shortcut");
else
System.out.println("You chose " + cmd);
Object cmp = evt.getSource();
// System.out.println("Source " + cmp);
if (cmp == exitItem)
System.exit(0);
}
public static void main(String[] arg) {
new MenuShortcuts("Testing 1 2 3...").setVisible(true);
}
}
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