/* * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.swing.border; import java.awt.Graphics;import java.awt.Insets;import java.awt.Component;import java.beans.ConstructorProperties; /** * 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}. * * @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     */    @ConstructorProperties({"outsideBorder", "insideBorder"})    public CompoundBorder(Border outsideBorder, Border insideBorder) {        this.outsideBorder = outsideBorder;        this.insideBorder = insideBorder;    }     /**     * Returns whether or not the compound border is opaque.     *     * @return {@code true} if the inside and outside borders     *         are each either {@code null} or opaque;     *         or {@code false} otherwise     */    @Override    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 outside border object.     */    public Border getOutsideBorder() {        return outsideBorder;    }     /**     * Returns the inside border object.     */    public Border getInsideBorder() {        return insideBorder;    }}