/* * Copyright (c) 2010, 2011, 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.BasicStroke;import java.awt.Component;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.Insets;import java.awt.Paint;import java.awt.RenderingHints;import java.awt.geom.Rectangle2D;import java.beans.ConstructorProperties; /** * A class which implements a border of an arbitrary stroke. * <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&trade; * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author Sergey A. Malenkov * * @since 1.7 */public class StrokeBorder extends AbstractBorder {    private final BasicStroke stroke;    private final Paint paint;     /**     * Creates a border of the specified {@code stroke}.     * The component's foreground color will be used to render the border.     *     * @param stroke  the {@link BasicStroke} object used to stroke a shape     *     * @throws NullPointerException if the specified {@code stroke} is {@code null}     */    public StrokeBorder(BasicStroke stroke) {        this(stroke, null);    }     /**     * Creates a border of the specified {@code stroke} and {@code paint}.     * If the specified {@code paint} is {@code null},     * the component's foreground color will be used to render the border.     *     * @param stroke  the {@link BasicStroke} object used to stroke a shape     * @param paint   the {@link Paint} object used to generate a color     *     * @throws NullPointerException if the specified {@code stroke} is {@code null}     */    @ConstructorProperties({ "stroke", "paint" })    public StrokeBorder(BasicStroke stroke, Paint paint) {        if (stroke == null) {            throw new NullPointerException("border's stroke");        }        this.stroke = stroke;        this.paint = paint;    }     /**     * Paints the border for the specified component     * with the specified position and size.     * If the border was not specified with a {@link Paint} object,     * the component's foreground color will be used to render the border.     * If the component's foreground color is not available,     * the default color of the {@link Graphics} object will be used.     *     * @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     *     * @throws NullPointerException if the specified {@code g} is {@code null}     */    @Override    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {        float size = this.stroke.getLineWidth();        if (size > 0.0f) {            g = g.create();            if (g instanceof Graphics2D) {                Graphics2D g2d = (Graphics2D) g;                g2d.setStroke(this.stroke);                g2d.setPaint(this.paint != null ? this.paint : c == null ? null : c.getForeground());                g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,                                     RenderingHints.VALUE_ANTIALIAS_ON);                g2d.draw(new Rectangle2D.Float(x + size / 2, y + size / 2, width - size, height - size));            }            g.dispose();        }    }     /**     * Reinitializes the {@code insets} parameter     * with this border's current insets.     * Every inset is the smallest (closest to negative infinity) integer value     * that is greater than or equal to the line width of the stroke     * that is used to paint the border.     *     * @param c       the component for which this border insets value applies     * @param insets  the {@code Insets} object to be reinitialized     * @return the reinitialized {@code insets} parameter     *     * @throws NullPointerException if the specified {@code insets} is {@code null}     *     * @see Math#ceil     */    @Override    public Insets getBorderInsets(Component c, Insets insets) {        int size = (int) Math.ceil(this.stroke.getLineWidth());        insets.set(size, size, size, size);        return insets;    }     /**     * Returns the {@link BasicStroke} object used to stroke a shape     * during the border rendering.     *     * @return the {@link BasicStroke} object     */    public BasicStroke getStroke() {        return this.stroke;    }     /**     * Returns the {@link Paint} object used to generate a color     * during the border rendering.     *     * @return the {@link Paint} object or {@code null}     *         if the {@code paint} parameter is not set     */    public Paint getPaint() {        return this.paint;    }}