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/* * @(#)CompoundBorder.java 1.21 05/11/17 * * Copyright 2006 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.Component; /** * A composite Border class used to compose two Border objects * into a single border by nesting an inside Border object within * the insets of an outside Border object. * * For example, this class may be used to add blank margin space * to a component with an existing decorative border: * <p> * <code><pre> * Border border = comp.getBorder(); * Border margin = new EmptyBorder(10,10,10,10); * comp.setBorder(new CompoundBorder(border, margin)); * </pre></code> * <p> * <strong>Warning:</strong> * 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 JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @version 1.21 11/17/05 * @author David Kloba */ public class CompoundBorder extends AbstractBorder { protected Border outsideBorder; protected Border insideBorder; /** * Creates a compound border with null outside and inside borders. */ public CompoundBorder() { this.outsideBorder = null; this.insideBorder = null; } /** * Creates a compound border with the specified outside and * inside borders. Either border may be null. * @param outsideBorder the outside border * @param insideBorder the inside border to be nested */ public CompoundBorder(Border outsideBorder, Border insideBorder) { this.outsideBorder = outsideBorder; this.insideBorder = insideBorder; } /** * Returns whether or not this compound border is opaque. * Returns true if both the inside and outside borders are * non-null and opaque; returns false otherwise. */ public boolean isBorderOpaque() { return (outsideBorder == null || outsideBorder.isBorderOpaque()) && (insideBorder == null || insideBorder.isBorderOpaque()); } /** * Paints the compound border by painting the outside border * with the specified position and size and then painting the * inside border at the specified position and size offset by * the insets of the outside border. * @param c the component for which this border is being painted * @param g the paint graphics * @param x the x position of the painted border * @param y the y position of the painted border * @param width the width of the painted border * @param height the height of the painted border */ public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) { Insets nextInsets; int px, py, pw, ph; px = x; py = y; pw = width; ph = height; if(outsideBorder != null) { outsideBorder.paintBorder(c, g, px, py, pw, ph); nextInsets = outsideBorder.getBorderInsets(c); px += nextInsets.left; py += nextInsets.top; pw = pw - nextInsets.right - nextInsets.left; ph = ph - nextInsets.bottom - nextInsets.top; } if(insideBorder != null) insideBorder.paintBorder(c, g, px, py, pw, ph); } /** * 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 nextInsets; insets.top = insets.left = insets.right = insets.bottom = 0; if(outsideBorder != null) { nextInsets = outsideBorder.getBorderInsets(c); insets.top += nextInsets.top; insets.left += nextInsets.left; insets.right += nextInsets.right; insets.bottom += nextInsets.bottom; } if(insideBorder != null) { nextInsets = insideBorder.getBorderInsets(c); insets.top += nextInsets.top; insets.left += nextInsets.left; insets.right += nextInsets.right; insets.bottom += nextInsets.bottom; } return insets; } /** * Returns the insets of the composite border by adding * the insets of the outside border to the insets of the * inside border. * @param c the component for which this border insets value applies */ public Insets getBorderInsets(Component c) { return getBorderInsets(c, new Insets(0,0,0,0)); } /** * Returns the outside border object. */ public Border getOutsideBorder() { return outsideBorder; } /** * Returns the inside border object. */ public Border getInsideBorder() { return insideBorder; } }