/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - 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. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. */ package components;import java.awt.*;import java.awt.event.*;import javax.swing.*;/** * @author ges * @author kwalrath *//* MenuLayoutDemo.java requires no other files. */public class MenuLayoutDemo {    public JMenuBar createMenuBar() {        JMenuBar menuBar = new JMenuBar();        menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.PAGE_AXIS));        menuBar.add(createMenu("Menu 1"));        menuBar.add(createMenu("Menu 2"));        menuBar.add(createMenu("Menu 3"));        menuBar.setBorder(BorderFactory.createMatteBorder(0,0,0,1,                                                          Color.BLACK));        return menuBar;    }    // used by createMenuBar    public JMenu createMenu(String title) {        JMenu m = new HorizontalMenu(title);        m.add("Menu item #1 in " + title);        m.add("Menu item #2 in " + title);        m.add("Menu item #3 in " + title);        JMenu submenu = new HorizontalMenu("Submenu");        submenu.add("Submenu item #1");        submenu.add("Submenu item #2");        m.add(submenu);        return m;    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        JFrame frame = new JFrame("MenuLayoutDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        MenuLayoutDemo demo = new MenuLayoutDemo();        Container contentPane = frame.getContentPane();        contentPane.setBackground(Color.WHITE); //contrasting bg        contentPane.add(demo.createMenuBar(),                        BorderLayout.LINE_START);        //Display the window.        frame.setSize(300, 150);        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }    class HorizontalMenu extends JMenu {        HorizontalMenu(String label) {            super(label);            JPopupMenu pm = getPopupMenu();            pm.setLayout(new BoxLayout(pm, BoxLayout.LINE_AXIS));        }        public Dimension getMinimumSize() {            return getPreferredSize();        }        public Dimension getMaximumSize() {            return getPreferredSize();        }        public void setPopupMenuVisible(boolean b) {            boolean isVisible = isPopupMenuVisible();            if (b != isVisible) {                if ((b==true) && isShowing()) {                    //Set location of popupMenu (pulldown or pullright).                    //Perhaps this should be dictated by L&F.                    int x = 0;                    int y = 0;                    Container parent = getParent();                    if (parent instanceof JPopupMenu) {                        x = 0;                        y = getHeight();                    } else {                        x = getWidth();                        y = 0;                    }                    getPopupMenu().show(this, x, y);                } else {                    getPopupMenu().setVisible(false);                }            }        }    }}