/* * Copyright (c) 2005, 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 sun.swing.icon; import java.awt.Color;import java.awt.Component;import java.awt.Graphics;import java.io.Serializable;import javax.swing.Icon;import javax.swing.UIManager;import javax.swing.plaf.UIResource; /** * Sorting icon. * */public class SortArrowIcon implements Icon, UIResource, Serializable {    // Height of the arrow, the width is ARROW_HEIGHT    private static final int ARROW_HEIGHT = 5;     // Amount of pad to left of arrow    private static final int X_PADDING = 7;     // Sort direction    private boolean ascending;     // The Color to use, may be null indicating colorKey should be used    private Color color;     // If non-null indicates the color should come from the UIManager with    // this key.    private String colorKey;     /**     * Creates a <code>SortArrowIcon</code>.     *     * @param ascending if true, icon respresenting ascending sort, otherwise     *        descending     * @param color the color to render the icon     */    public SortArrowIcon(boolean ascending, Color color) {        this.ascending = ascending;        this.color = color;        if (color == null) {            throw new IllegalArgumentException();        }    }     /**     * Creates a <code>SortArrowIcon</code>.     *     * @param ascending if true, icon respresenting ascending sort, otherwise     *        descending     * @param colorKey the key used to find color in UIManager     */    public SortArrowIcon(boolean ascending, String colorKey) {        this.ascending = ascending;        this.colorKey = colorKey;        if (colorKey == null) {            throw new IllegalArgumentException();        }    }     public void paintIcon(Component c, Graphics g, int x, int y) {        g.setColor(getColor());        int startX = X_PADDING + x + ARROW_HEIGHT / 2;        if (ascending) {            int startY = y;            g.fillRect(startX, startY, 1, 1);            for (int line = 1; line < ARROW_HEIGHT; line++) {                g.fillRect(startX - line, startY + line,                           line + line + 1, 1);            }        }        else {            int startY = y + ARROW_HEIGHT - 1;            g.fillRect(startX, startY, 1, 1);            for (int line = 1; line < ARROW_HEIGHT; line++) {                g.fillRect(startX - line, startY - line,                           line + line + 1, 1);            }        }    }     public int getIconWidth() {        return X_PADDING + ARROW_HEIGHT * 2;    }     public int getIconHeight() {        return ARROW_HEIGHT + 2;    }     private Color getColor() {        if (color != null) {            return color;        }        return UIManager.getColor(colorKey);    }}