1 /* 2 * Copyright (c) 2005, 2014, 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 @SuppressWarnings("serial") // JDK-implementation class 40 public class SortArrowIcon implements Icon, UIResource, Serializable { 41 // Height of the arrow, the width is ARROW_HEIGHT 42 private static final int ARROW_HEIGHT = 5; 43 44 // Amount of pad to left of arrow 45 private static final int X_PADDING = 7; 46 47 // Sort direction 48 private boolean ascending; 49 50 // The Color to use, may be null indicating colorKey should be used 51 private Color color; 52 53 // If non-null indicates the color should come from the UIManager with 54 // this key. 55 private String colorKey; 56 57 /** 58 * Creates a <code>SortArrowIcon</code>. 59 * 60 * @param ascending if true, icon respresenting ascending sort, otherwise 61 * descending 62 * @param color the color to render the icon 63 */ 64 public SortArrowIcon(boolean ascending, Color color) { 65 this.ascending = ascending; 66 this.color = color; 67 if (color == null) { 68 throw new IllegalArgumentException(); 69 } 70 } 71 72 /** 73 * Creates a <code>SortArrowIcon</code>. 74 * 75 * @param ascending if true, icon respresenting ascending sort, otherwise 76 * descending 77 * @param colorKey the key used to find color in UIManager 78 */ 79 public SortArrowIcon(boolean ascending, String colorKey) { 80 this.ascending = ascending; 81 this.colorKey = colorKey; 82 if (colorKey == null) { 83 throw new IllegalArgumentException(); 84 } 85 } 86 87 public void paintIcon(Component c, Graphics g, int x, int y) { 88 g.setColor(getColor()); 89 int startX = X_PADDING + x + ARROW_HEIGHT / 2; 90 if (ascending) { 91 int startY = y; 92 g.fillRect(startX, startY, 1, 1); 93 for (int line = 1; line < ARROW_HEIGHT; line++) { 94 g.fillRect(startX - line, startY + line, 95 line + line + 1, 1); 96 } 97 } 98 else { 99 int startY = y + ARROW_HEIGHT - 1; 100 g.fillRect(startX, startY, 1, 1); 101 for (int line = 1; line < ARROW_HEIGHT; line++) { 102 g.fillRect(startX - line, startY - line, 103 line + line + 1, 1); 104 } 105 } 106 } 107 108 public int getIconWidth() { 109 return X_PADDING + ARROW_HEIGHT * 2; 110 } 111 112 public int getIconHeight() { 113 return ARROW_HEIGHT + 2; 114 } 115 116 private Color getColor() { 117 if (color != null) { 118 return color; 119 } 120 return UIManager.getColor(colorKey); 121 } 122 }