src/main/java/de/uapcore/sudoku/MainMenu.java

/*
 * Copyright 2013 Mike Becker. All rights reserved.
 * 
 * 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 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 HOLDER 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 de.uapcore.sudoku;

import javax.swing.*;

/**
 * Main menu bar.
 */
public class MainMenu extends JMenuBar {
    
    private final ActionHandler handler;

    public MainMenu(ActionHandler h) {
        handler = h;
        add(createMenu("Datei", 'd',
            createMenuItem("Neu", 'n', "control N", ActionHandler.NEW),
            createMenuItem("Öffnen", 'f', "control O", ActionHandler.OPEN),
            createMenuItem("Speichern", 's', "control S", ActionHandler.SAVE),
            createMenuItem("Speichern als...", 'a', ActionHandler.SAVE_AS),
            createSeparator(),
            createMenuItem("Prüfen", 'p', "control P", ActionHandler.CHECK),
            createMenuItem("Lösen", 'l', "control L", ActionHandler.SOLVE),
            createSeparator(),
            createMenuItem("Beenden", 'e', ActionHandler.QUIT)
        ));
        add(createMenu("Info", 'i',
            createMenuItem("Über...", 'b', "F1", ActionHandler.ABOUT)
        ));
    }
    
    private JMenuItem createSeparator() {
        // Return null, the createMenu method knows how to handle it
        return null;
    }
    
    private JMenu createMenu(String caption, char mnemonic, JMenuItem...items) {
        JMenu menu = new JMenu(caption);
        menu.setMnemonic(mnemonic);
        for (JMenuItem item : items) {
            if (item == null) {
                menu.addSeparator();
            } else {
                menu.add(item);
            }
        }
        return menu;
    }
    
    private JMenuItem createMenuItem(String caption, char mnemonic,
            String command) {
        return createMenuItem(caption, mnemonic, null, command);
    }
    
    private JMenuItem createMenuItem(String caption, char mnemonic,
            String stroke, String command) {
        JMenuItem item = new JMenuItem(caption);
        item.setMnemonic(mnemonic);
        if (stroke != null) {
            item.setAccelerator(KeyStroke.getKeyStroke(stroke));
        }
        item.setActionCommand(command);
        item.addActionListener(handler);
        
        return item;
    }

}