/* Border.java --
Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
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02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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package javax.swing.border;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
/**
* An public interface for decorative or spacing borders around a Component.
*
* <p>To reduce memory consumption, several Components may share a
* single Border instance. {@link javax.swing.BorderFactory} is a
* factory class for producing commonly used shared borders.
*
* @see javax.swing.BorderFactory
* @see EmptyBorder
* @see CompoundBorder
* @see BevelBorder
* @see EtchedBorder
* @see LineBorder
* @see MatteBorder
* @see SoftBevelBorder
* @see TitledBorder
* @see AbstractBorder
*
* @author Ronald Veldema (rveldema@cs.vu.nl)
* @author Michael Koch (konqueror@gmx.de)
* @author Sascha Brawer (brawer@dandelis.ch)
*/
public interface Border
{
/**
* Paints the border for a given component.
*
* @param c the component whose border is to be painted.
* @param g the graphics for painting.
* @param x the horizontal position for painting the border.
* @param y the vertical position for painting the border.
* @param width the width of the available area for painting the border.
* @param height the height of the available area for painting the border.
*/
void paintBorder(Component c, Graphics g, int x, int y, int width,
int height);
/**
* Measures the width of this border.
*
* @param c the component whose border is to be measured.
*
* @return an Insets object whose <code>left</code>, <code>right</code>,
* <code>top</code> and <code>bottom</code> fields indicate the
* width of the border at the respective edge.
*/
Insets getBorderInsets(Component c);
/**
* Determines whether this border fills every pixel in its area
* when painting.
*
* @return <code>true</code> if the border is fully opaque, or
* <code>false</code> if some pixels of the background
* can shine through the border.
*/
boolean isBorderOpaque();
}