1 /* 2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package sun.swing.icon; 26 27 import java.awt.Color; 28 import java.awt.Component; 29 import java.awt.Graphics; 30 import java.io.Serializable; 31 import javax.swing.Icon; 32 import javax.swing.UIManager; 33 import javax.swing.plaf.UIResource; 34 35 /** 36 * Sorting icon. 37 * 38 */ 39 public class SortArrowIcon implements Icon, UIResource, Serializable { 40 // Height of the arrow, the width is ARROW_HEIGHT 41 private static final int ARROW_HEIGHT = 5; 42 43 // Amount of pad to left of arrow 44 private static final int X_PADDING = 7; 45 46 // Sort direction 47 private boolean ascending; 48 49 // The Color to use, may be null indicating colorKey should be used 50 private Color color; 51 52 // If non-null indicates the color should come from the UIManager with 53 // this key. 54 private String colorKey; 55 56 /** 57 * Creates a <code>SortArrowIcon</code>. 58 * 59 * @param ascending if true, icon respresenting ascending sort, otherwise 60 * descending 61 * @param color the color to render the icon 62 */ 63 public SortArrowIcon(boolean ascending, Color color) { 64 this.ascending = ascending; 65 this.color = color; 66 if (color == null) { 67 throw new IllegalArgumentException(); 68 } 69 } 70 71 /** 72 * Creates a <code>SortArrowIcon</code>. 73 * 74 * @param ascending if true, icon respresenting ascending sort, otherwise 75 * descending 76 * @param colorKey the key used to find color in UIManager 77 */ 78 public SortArrowIcon(boolean ascending, String colorKey) { 79 this.ascending = ascending; 80 this.colorKey = colorKey; 81 if (colorKey == null) { 82 throw new IllegalArgumentException(); 83 } 84 } 85 86 public void paintIcon(Component c, Graphics g, int x, int y) { 87 g.setColor(getColor()); 88 int startX = X_PADDING + x + ARROW_HEIGHT / 2; 89 if (ascending) { 90 int startY = y; 91 g.fillRect(startX, startY, 1, 1); 92 for (int line = 1; line < ARROW_HEIGHT; line++) { 93 g.fillRect(startX - line, startY + line, 94 line + line + 1, 1); 95 } 96 } 97 else { 98 int startY = y + ARROW_HEIGHT - 1; 99 g.fillRect(startX, startY, 1, 1); 100 for (int line = 1; line < ARROW_HEIGHT; line++) { 101 g.fillRect(startX - line, startY - line, 102 line + line + 1, 1); 103 } 104 } 105 } 106 107 public int getIconWidth() { 108 return X_PADDING + ARROW_HEIGHT * 2; 109 } 110 111 public int getIconHeight() { 112 return ARROW_HEIGHT + 2; 113 } 114 115 private Color getColor() { 116 if (color != null) { 117 return color; 118 } 119 return UIManager.getColor(colorKey); 120 } 121 }