/*
* Copyright (c) 2001-2005, Gaudenz Alder
*
* All rights reserved.
*
* This file is licensed under the JGraph software license, a copy of which
* will have been provided to you in the file LICENSE at the root of your
* installation directory. If you are unable to locate this file please
* contact JGraph sales for another copy.
*/
package cn.edu.ustc.biofilm.BioPano.editor;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
import java.io.Serializable;
import javax.swing.border.Border;
/**
* Border with a drop shadow.
*/
public class ShadowBorder implements Border, Serializable
{
/**
*
*/
private static final long serialVersionUID = 6854989457150641240L;
private Insets insets;
public static ShadowBorder sharedInstance = new ShadowBorder();
private ShadowBorder()
{
insets = new Insets(0, 0, 2, 2);
}
public Insets getBorderInsets(Component c)
{
return insets;
}
public boolean isBorderOpaque()
{
return false;
}
public void paintBorder(Component c, Graphics g, int x, int y, int w, int h)
{
// choose which colors we want to use
Color bg = c.getBackground();
if (c.getParent() != null)
{
bg = c.getParent().getBackground();
}
if (bg != null)
{
Color mid = bg.darker();
Color edge = average(mid, bg);
g.setColor(bg);
g.drawLine(0, h - 2, w, h - 2);
g.drawLine(0, h - 1, w, h - 1);
g.drawLine(w - 2, 0, w - 2, h);
g.drawLine(w - 1, 0, w - 1, h);
// draw the drop-shadow
g.setColor(mid);
g.drawLine(1, h - 2, w - 2, h - 2);
g.drawLine(w - 2, 1, w - 2, h - 2);
g.setColor(edge);
g.drawLine(2, h - 1, w - 2, h - 1);
g.drawLine(w - 1, 2, w - 1, h - 2);
}
}
private static Color average(Color c1, Color c2)
{
int red = c1.getRed() + (c2.getRed() - c1.getRed()) / 2;
int green = c1.getGreen() + (c2.getGreen() - c1.getGreen()) / 2;
int blue = c1.getBlue() + (c2.getBlue() - c1.getBlue()) / 2;
return new Color(red, green, blue);
}
public static ShadowBorder getSharedInstance()
{
return sharedInstance;
}
}