    001    /* ========================================================================
    002     * JCommon : a free general purpose class library for the Java(tm) platform
    003     * ========================================================================
    004     *
    005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jcommon/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     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * -------------------
    028     * BevelArrowIcon.java
    029     * -------------------
    030     * (C) Copyright 2000-2004, by Nobuo Tamemasa and Contributors.
    031     *
    032     * Original Author:  Nobuo Tamemasa;
    033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034     *
    035     * $Id: BevelArrowIcon.java,v 1.4 2005/11/16 15:58:41 taqua Exp $
    036     *
    037     * Changes (from 26-Oct-2001)
    038     * --------------------------
    039     * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
    040     * 13-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    041     *
    042     */
    043
    044    package org.jfree.ui;
    045
    046    import java.awt.Color;
    047    import java.awt.Component;
    048    import java.awt.Graphics;
    049
    050    import javax.swing.Icon;
    051    import javax.swing.UIManager;
    052
    053    /**
    054     * An arrow icon that can point up or down (usually used to indicate the sort direction in a table).
    055     * <P>
    056     * This class (and also SortButtonRenderer) is based on original code by Nobuo Tamemasa (version
    057     * 1.0, 26-Feb-1999) posted on www.codeguru.com.
    058     *
    059     * @author Nobuo Tamemasa
    060     */
    061    public class BevelArrowIcon implements Icon {
    062
    063        /** Constant indicating that the arrow is pointing up. */
    064        public static final int UP = 0;
    065
    066        /** Constant indicating that the arrow is pointing down. */
    067        public static final int DOWN = 1;
    068
    069        /** The default arrow size. */
    070        private static final int DEFAULT_SIZE = 11;
    071
    072        /** Edge color 1. */
    073        private Color edge1;
    074
    075        /** Edge color 2. */
    076        private Color edge2;
    077
    078        /** The fill color for the arrow icon. */
    079        private Color fill;
    080
    081        /** The size of the icon. */
    082        private int size;
    083
    084        /** The direction that the arrow is pointing (UP or DOWN). */
    085        private int direction;
    086
    087        /**
    088         * Standard constructor - builds an icon with the specified attributes.
    089         *
    090         * @param direction .
    091         * @param isRaisedView .
    092         * @param isPressedView .
    093         */
    094        public BevelArrowIcon(final int direction,
    095                              final boolean isRaisedView,
    096                              final boolean isPressedView) {
    097            if (isRaisedView) {
    098                if (isPressedView) {
    099                    init(UIManager.getColor("controlLtHighlight"),
    100                         UIManager.getColor("controlDkShadow"),
    101                         UIManager.getColor("controlShadow"),
    102                         DEFAULT_SIZE, direction);
    103                }
    104                else {
    105                    init(UIManager.getColor("controlHighlight"),
    106                         UIManager.getColor("controlShadow"),
    107                         UIManager.getColor("control"),
    108                         DEFAULT_SIZE, direction);
    109                }
    110            }
    111            else {
    112                if (isPressedView) {
    113                    init(UIManager.getColor("controlDkShadow"),
    114                         UIManager.getColor("controlLtHighlight"),
    115                         UIManager.getColor("controlShadow"),
    116                         DEFAULT_SIZE, direction);
    117                }
    118                else {
    119                    init(UIManager.getColor("controlShadow"),
    120                         UIManager.getColor("controlHighlight"),
    121                         UIManager.getColor("control"),
    122                         DEFAULT_SIZE, direction);
    123                }
    124            }
    125        }
    126
    127        /**
    128         * Standard constructor - builds an icon with the specified attributes.
    129         *
    130         * @param edge1  the color of edge1.
    131         * @param edge2  the color of edge2.
    132         * @param fill  the fill color.
    133         * @param size  the size of the arrow icon.
    134         * @param direction  the direction that the arrow points.
    135         */
    136        public BevelArrowIcon(final Color edge1,
    137                              final Color edge2,
    138                              final Color fill,
    139                              final int size,
    140                              final int direction) {
    141            init(edge1, edge2, fill, size, direction);
    142        }
    143
    144        /**
    145         * Paints the icon at the specified position.  Supports the Icon interface.
    146         *
    147         * @param c .
    148         * @param g .
    149         * @param x .
    150         * @param y .
    151         */
    152        public void paintIcon(final Component c,
    153                              final Graphics g,
    154                              final int x,
    155                              final int y) {
    156            switch (this.direction) {
    157                case DOWN: drawDownArrow(g, x, y); break;
    158                case   UP: drawUpArrow(g, x, y);   break;
    159            }
    160        }
    161
    162        /**
    163         * Returns the width of the icon.  Supports the Icon interface.
    164         *
    165         * @return the icon width.
    166         */
    167        public int getIconWidth() {
    168            return this.size;
    169        }
    170
    171        /**
    172         * Returns the height of the icon.  Supports the Icon interface.
    173         * @return the icon height.
    174         */
    175        public int getIconHeight() {
    176            return this.size;
    177        }
    178
    179        /**
    180         * Initialises the attributes of the arrow icon.
    181         *
    182         * @param edge1  the color of edge1.
    183         * @param edge2  the color of edge2.
    184         * @param fill  the fill color.
    185         * @param size  the size of the arrow icon.
    186         * @param direction  the direction that the arrow points.
    187         */
    188        private void init(final Color edge1,
    189                          final Color edge2,
    190                          final Color fill,
    191                          final int size,
    192                          final int direction) {
    193            this.edge1 = edge1;
    194            this.edge2 = edge2;
    195            this.fill = fill;
    196            this.size = size;
    197            this.direction = direction;
    198        }
    199
    200        /**
    201         * Draws the arrow pointing down.
    202         *
    203         * @param g  the graphics device.
    204         * @param xo  ??
    205         * @param yo  ??
    206         */
    207        private void drawDownArrow(final Graphics g, final int xo, final int yo) {
    208            g.setColor(this.edge1);
    209            g.drawLine(xo, yo,   xo + this.size - 1, yo);
    210            g.drawLine(xo, yo + 1, xo + this.size - 3, yo + 1);
    211            g.setColor(this.edge2);
    212            g.drawLine(xo + this.size - 2, yo + 1, xo + this.size - 1, yo + 1);
    213            int x = xo + 1;
    214            int y = yo + 2;
    215            int dx = this.size - 6;
    216            while (y + 1 < yo + this.size) {
    217                g.setColor(this.edge1);
    218                g.drawLine(x, y,   x + 1, y);
    219                g.drawLine(x, y + 1, x + 1, y + 1);
    220                if (0 < dx) {
    221                    g.setColor(this.fill);
    222                    g.drawLine(x + 2, y,   x + 1 + dx, y);
    223                    g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
    224                }
    225                g.setColor(this.edge2);
    226                g.drawLine(x + dx + 2, y,   x + dx + 3, y);
    227                g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
    228                x += 1;
    229                y += 2;
    230                dx -= 2;
    231            }
    232            g.setColor(this.edge1);
    233            g.drawLine(
    234                xo + (this.size / 2), yo + this.size - 1, xo + (this.size / 2), yo + this.size - 1
    235            );
    236        }
    237
    238        /**
    239         * Draws the arrow pointing up.
    240         *
    241         * @param g  the graphics device.
    242         * @param xo  ??
    243         * @param yo  ??
    244         */
    245        private void drawUpArrow(final Graphics g, final int xo, final int yo) {
    246            g.setColor(this.edge1);
    247            int x = xo + (this.size / 2);
    248            g.drawLine(x, yo, x, yo);
    249            x--;
    250            int y = yo + 1;
    251            int dx = 0;
    252            while (y + 3 < yo + this.size) {
    253                g.setColor(this.edge1);
    254                g.drawLine(x, y,   x + 1, y);
    255                g.drawLine(x, y + 1, x + 1, y + 1);
    256                if (0 < dx) {
    257                    g.setColor(this.fill);
    258                    g.drawLine(x + 2, y,   x + 1 + dx, y);
    259                    g.drawLine(x + 2, y + 1, x + 1 + dx, y + 1);
    260                }
    261                g.setColor(this.edge2);
    262                g.drawLine(x + dx + 2, y,   x + dx + 3, y);
    263                g.drawLine(x + dx + 2, y + 1, x + dx + 3, y + 1);
    264                x -= 1;
    265                y += 2;
    266                dx += 2;
    267            }
    268            g.setColor(this.edge1);
    269            g.drawLine(xo, yo + this.size - 3,   xo + 1, yo + this.size - 3);
    270            g.setColor(this.edge2);
    271            g.drawLine(xo + 2, yo + this.size - 2, xo + this.size - 1, yo + this.size - 2);
    272            g.drawLine(xo, yo + this.size - 1, xo + this.size, yo + this.size - 1);
    273        }
    274
    275    }