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A LookAndFeel library for swing
There is a newer version: 1.6.13
/*
* Copyright (c) 2002 and later by MH Software-Entwicklung. All Rights Reserved.
*  
* JTattoo is multiple licensed. If your are an open source developer you can use
* it under the terms and conditions of the GNU General Public License version 2.0
* or later as published by the Free Software Foundation.
*  
* see: gpl-2.0.txt
* 
* If you pay for a license you will become a registered user who could use the
* software under the terms and conditions of the GNU Lesser General Public License
* version 2.0 or later with classpath exception as published by the Free Software
* Foundation.
* 
* see: lgpl-2.0.txt
* see: classpath-exception.txt
* 
* Registered users could also use JTattoo under the terms and conditions of the 
* Apache License, Version 2.0 as published by the Apache Software Foundation.
*  
* see: APACHE-LICENSE-2.0.txt
*/

package com.jtattoo.plaf;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import javax.swing.JComponent;
import javax.swing.JPopupMenu;
import javax.swing.JSeparator;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicSeparatorUI;

/**
 * @author Michael Hagen
 */
public class BaseSeparatorUI extends BasicSeparatorUI {

    private static final Dimension size = new Dimension(2, 3);

    public static ComponentUI createUI(JComponent c) {
        return new BaseSeparatorUI();
    }

    public void paint(Graphics g, JComponent c) {
        boolean horizontal = true;
        if (c instanceof JSeparator) {
            horizontal = (((JSeparator) c).getOrientation() == JSeparator.HORIZONTAL);
        }
        Color background = (c instanceof JPopupMenu.Separator) ? AbstractLookAndFeel.getMenuBackgroundColor() : AbstractLookAndFeel.getBackgroundColor();
        if (horizontal) {
            int w = c.getWidth();
            g.setColor(background);
            g.drawLine(0, 0, w, 0);
            g.setColor(ColorHelper.darker(background, 30));
            g.drawLine(0, 1, w, 1);
            g.setColor(ColorHelper.brighter(background, 50));
            g.drawLine(0, 2, w, 2);
        } else {
            int h = c.getHeight();
            g.setColor(ColorHelper.darker(background, 30));
            g.drawLine(0, 0, 0, h);
            g.setColor(ColorHelper.brighter(background, 50));
            g.drawLine(1, 0, 1, h);
        }
    }

    public Dimension getPreferredSize(JComponent c) {
        return size;
    }
}