| /* |
| * 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™ |
| * 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; |
| } |
| } |
