001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-present, by David Gilbert and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * ---------------
028 * BlockFrame.java
029 * ---------------
030 * (C) Copyright 2007-present, by David Gilbert.
031 *
032 * Original Author:  David Gilbert;
033 * Contributor(s):   -;
034 *
035 */
036
037package org.jfree.chart.block;
038
039import java.awt.Graphics2D;
040import java.awt.geom.Rectangle2D;
041import org.jfree.chart.ui.RectangleInsets;
042import org.jfree.chart.util.PublicCloneable;
043
044/**
045 * A block frame is a type of border that can be drawn around the outside of
046 * any {@link AbstractBlock}.  Classes that implement this interface should
047 * implement {@link PublicCloneable} OR be immutable.
048 */
049public interface BlockFrame {
050
051    /**
052     * Returns the space reserved for the border.
053     *
054     * @return The space (never {@code null}).
055     */
056    RectangleInsets getInsets();
057
058    /**
059     * Draws the border by filling in the reserved space (in black).
060     *
061     * @param g2  the graphics device.
062     * @param area  the area.
063     */
064    void draw(Graphics2D g2, Rectangle2D area);
065
066}