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The JGoodies Looks make your Swing applications and applets look better. They have been optimized for readability, precise micro-design and usability. And they simplify the multi-platform support by using similar widget dimensions. In addition, many people have reviewed them as elegant.

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/*
 * Copyright (c) 2001-2012 JGoodies Karsten Lentzsch. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o 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.
 *
 *  o Neither the name of JGoodies Karsten Lentzsch 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 com.jgoodies.looks.plastic;

import java.awt.Color;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.plaf.ComponentUI;

import com.jgoodies.looks.common.ExtBasicMenuUI;

/**
 * The JGoodies Plastic look&feel implementation of {@code MenuUI}.
 * It differs from the superclass in that it uses an overhauled menu
 * rendering an aligmnent system. Furthermore, you can set a client property
 * Options.NO_ICONS_KEY to indicate that this menu has no icons.
 *
 * @author  Karsten Lentzsch
 * @version $Revision: 1.14 $
 *
 * @see	com.jgoodies.looks.Options
 */
public final class PlasticMenuUI extends ExtBasicMenuUI {


    private boolean oldOpaque;


	public static ComponentUI createUI(JComponent b) {
		return new PlasticMenuUI();
	}

    @Override
    protected void installDefaults() {
        super.installDefaults();
        oldOpaque = menuItem.isOpaque();
    }



	/**
	 * Makes the item transparent, if it is not a sub menu and the model is not selected.
	 */
	@Override
    protected void paintMenuItem(Graphics g, JComponent c, Icon aCheckIcon,
		Icon anArrowIcon, Color background, Color foreground, int textIconGap) {
        JMenuItem b = (JMenuItem) c;

        if (((JMenu) menuItem).isTopLevelMenu()) {
            b.setOpaque(false);
            if (b.getModel().isSelected()) {
                int menuWidth  = menuItem.getWidth();
                int menuHeight = menuItem.getHeight();
                Color oldColor = g.getColor();
                g.setColor(background);
                g.fillRect(0, 0, menuWidth, menuHeight);
                g.setColor(oldColor);
            }
        }
		super.paintMenuItem(g, c, aCheckIcon, anArrowIcon, background, foreground, textIconGap);
	}


}