1 /* 2 * Copyright (c) 1998, 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 26 package javax.swing.colorchooser; 27 28 import javax.swing.*; 29 import javax.swing.border.*; 30 import javax.swing.event.*; 31 import javax.swing.text.*; 32 import java.awt.*; 33 import java.awt.image.*; 34 import java.awt.event.*; 35 import java.beans.PropertyChangeEvent; 36 import java.beans.PropertyChangeListener; 37 import java.io.Serializable; 38 import sun.swing.SwingUtilities2; 39 40 41 /** 42 * The standard preview panel for the color chooser. 43 * <p> 44 * <strong>Warning:</strong> 45 * Serialized objects of this class will not be compatible with 46 * future Swing releases. The current serialization support is 47 * appropriate for short term storage or RMI between applications running 48 * the same version of Swing. As of 1.4, support for long term storage 49 * of all JavaBeans™ 50 * has been added to the <code>java.beans</code> package. 51 * Please see {@link java.beans.XMLEncoder}. 52 * 53 * @author Steve Wilson 54 * @see JColorChooser 55 */ 56 @SuppressWarnings("serial") // Same-version serialization only 57 class DefaultPreviewPanel extends JPanel { 58 59 private int squareSize = 25; 60 private int squareGap = 5; 61 private int innerGap = 5; 62 63 64 private int textGap = 5; 65 private Font font = new Font(Font.DIALOG, Font.PLAIN, 12); 66 private String sampleText; 67 68 private int swatchWidth = 50; 69 70 private Color oldColor = null; 71 72 private JColorChooser getColorChooser() { 73 return (JColorChooser)SwingUtilities.getAncestorOfClass( 74 JColorChooser.class, this); 75 } 76 77 public Dimension getPreferredSize() { 78 JComponent host = getColorChooser(); 79 if (host == null) { 80 host = this; 81 } 82 FontMetrics fm = host.getFontMetrics(getFont()); 83 84 int ascent = fm.getAscent(); 85 int height = fm.getHeight(); 86 int width = SwingUtilities2.stringWidth(host, fm, getSampleText()); 87 88 int y = height*3 + textGap*3; 89 int x = squareSize * 3 + squareGap*2 + swatchWidth + width + textGap*3; 90 return new Dimension( x,y ); 91 } 92 93 public void paintComponent(Graphics g) { 94 if (oldColor == null) 95 oldColor = getForeground(); 96 97 g.setColor(getBackground()); 98 g.fillRect(0,0,getWidth(),getHeight()); 99 100 if (this.getComponentOrientation().isLeftToRight()) { 101 int squareWidth = paintSquares(g, 0); 102 int textWidth = paintText(g, squareWidth); 103 paintSwatch(g, squareWidth + textWidth); 104 } else { 105 int swatchWidth = paintSwatch(g, 0); 106 int textWidth = paintText(g, swatchWidth); 107 paintSquares(g , swatchWidth + textWidth); 108 109 } 110 } 111 112 private int paintSwatch(Graphics g, int offsetX) { 113 int swatchX = offsetX; 114 g.setColor(oldColor); 115 g.fillRect(swatchX, 0, swatchWidth, (squareSize) + (squareGap/2)); 116 g.setColor(getForeground()); 117 g.fillRect(swatchX, (squareSize) + (squareGap/2), swatchWidth, (squareSize) + (squareGap/2) ); 118 return (swatchX+swatchWidth); 119 } 120 121 private int paintText(Graphics g, int offsetX) { 122 g.setFont(getFont()); 123 JComponent host = getColorChooser(); 124 if (host == null) { 125 host = this; 126 } 127 FontMetrics fm = SwingUtilities2.getFontMetrics(host, g); 128 129 int ascent = fm.getAscent(); 130 int height = fm.getHeight(); 131 int width = SwingUtilities2.stringWidth(host, fm, getSampleText()); 132 133 int textXOffset = offsetX + textGap; 134 135 Color color = getForeground(); 136 137 g.setColor(color); 138 139 SwingUtilities2.drawString(host, g, getSampleText(),textXOffset+(textGap/2), 140 ascent+2); 141 142 g.fillRect(textXOffset, 143 ( height) + textGap, 144 width + (textGap), 145 height +2); 146 147 g.setColor(Color.black); 148 SwingUtilities2.drawString(host, g, getSampleText(), 149 textXOffset+(textGap/2), 150 height+ascent+textGap+2); 151 152 153 g.setColor(Color.white); 154 155 g.fillRect(textXOffset, 156 ( height + textGap) * 2, 157 width + (textGap), 158 height +2); 159 160 g.setColor(color); 161 SwingUtilities2.drawString(host, g, getSampleText(), 162 textXOffset+(textGap/2), 163 ((height+textGap) * 2)+ascent+2); 164 165 return width + textGap*3; 166 167 } 168 169 private int paintSquares(Graphics g, int offsetX) { 170 171 int squareXOffset = offsetX; 172 Color color = getForeground(); 173 174 g.setColor(Color.white); 175 g.fillRect(squareXOffset,0,squareSize,squareSize); 176 g.setColor(color); 177 g.fillRect(squareXOffset+innerGap, 178 innerGap, 179 squareSize - (innerGap*2), 180 squareSize - (innerGap*2)); 181 g.setColor(Color.white); 182 g.fillRect(squareXOffset+innerGap*2, 183 innerGap*2, 184 squareSize - (innerGap*4), 185 squareSize - (innerGap*4)); 186 187 g.setColor(color); 188 g.fillRect(squareXOffset,squareSize+squareGap,squareSize,squareSize); 189 190 g.translate(squareSize+squareGap, 0); 191 g.setColor(Color.black); 192 g.fillRect(squareXOffset,0,squareSize,squareSize); 193 g.setColor(color); 194 g.fillRect(squareXOffset+innerGap, 195 innerGap, 196 squareSize - (innerGap*2), 197 squareSize - (innerGap*2)); 198 g.setColor(Color.white); 199 g.fillRect(squareXOffset+innerGap*2, 200 innerGap*2, 201 squareSize - (innerGap*4), 202 squareSize - (innerGap*4)); 203 g.translate(-(squareSize+squareGap), 0); 204 205 g.translate(squareSize+squareGap, squareSize+squareGap); 206 g.setColor(Color.white); 207 g.fillRect(squareXOffset,0,squareSize,squareSize); 208 g.setColor(color); 209 g.fillRect(squareXOffset+innerGap, 210 innerGap, 211 squareSize - (innerGap*2), 212 squareSize - (innerGap*2)); 213 g.translate(-(squareSize+squareGap), -(squareSize+squareGap)); 214 215 216 217 g.translate((squareSize+squareGap)*2, 0); 218 g.setColor(Color.white); 219 g.fillRect(squareXOffset,0,squareSize,squareSize); 220 g.setColor(color); 221 g.fillRect(squareXOffset+innerGap, 222 innerGap, 223 squareSize - (innerGap*2), 224 squareSize - (innerGap*2)); 225 g.setColor(Color.black); 226 g.fillRect(squareXOffset+innerGap*2, 227 innerGap*2, 228 squareSize - (innerGap*4), 229 squareSize - (innerGap*4)); 230 g.translate(-((squareSize+squareGap)*2), 0); 231 232 g.translate((squareSize+squareGap)*2, (squareSize+squareGap)); 233 g.setColor(Color.black); 234 g.fillRect(squareXOffset,0,squareSize,squareSize); 235 g.setColor(color); 236 g.fillRect(squareXOffset+innerGap, 237 innerGap, 238 squareSize - (innerGap*2), 239 squareSize - (innerGap*2)); 240 g.translate(-((squareSize+squareGap)*2), -(squareSize+squareGap)); 241 242 return (squareSize*3+squareGap*2); 243 244 } 245 246 private String getSampleText() { 247 if (this.sampleText == null) { 248 this.sampleText = UIManager.getString("ColorChooser.sampleText", getLocale()); 249 } 250 return this.sampleText; 251 } 252 }