/* * @(#)EmptyBorder.java 1.26 03/12/19 * * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package javax.swing.border; import java.awt.Graphics; import java.awt.Insets; import java.awt.Rectangle; import java.awt.Component; import java.io.Serializable; /** * A class which provides an empty, transparent border which * takes up space but does no drawing. *
* Warning:
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeansTM
* has been added to the java.beans
package.
* Please see {@link java.beans.XMLEncoder}.
*
* @version 1.26 12/19/03
* @author David Kloba
*/
public class EmptyBorder extends AbstractBorder implements Serializable
{
protected int left, right, top, bottom;
/**
* Creates an empty border with the specified insets.
* @param top the top inset of the border
* @param left the left inset of the border
* @param bottom the bottom inset of the border
* @param right the right inset of the border
*/
public EmptyBorder(int top, int left, int bottom, int right) {
this.top = top;
this.right = right;
this.bottom = bottom;
this.left = left;
}
/**
* Creates an empty border with the specified insets.
* @param borderInsets the insets of the border
*/
public EmptyBorder(Insets borderInsets) {
this.top = borderInsets.top;
this.right = borderInsets.right;
this.bottom = borderInsets.bottom;
this.left = borderInsets.left;
}
/**
* Does no drawing by default.
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
}
/**
* Returns the insets of the border.
* @param c the component for which this border insets value applies
*/
public Insets getBorderInsets(Component c) {
return getBorderInsets();
}
/**
* Reinitialize the insets parameter with this Border's current Insets.
* @param c the component for which this border insets value applies
* @param insets the object to be reinitialized
*/
public Insets getBorderInsets(Component c, Insets insets) {
insets.left = left;
insets.top = top;
insets.right = right;
insets.bottom = bottom;
return insets;
}
/**
* Returns the insets of the border.
*/
public Insets getBorderInsets() {
return new Insets(top, left, bottom, right);
}
/**
* Returns whether or not the border is opaque.
* Returns false by default.
*/
public boolean isBorderOpaque() { return false; }
}