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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2006, 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 javax.swing.plaf.basic; | ||
| 26 | |||
| 27 | import java.awt.Dimension; | ||
| 28 | import java.awt.Graphics; | ||
| 29 | import java.awt.Color; | ||
| 30 | |||
| 31 | import javax.swing.*; | ||
| 32 | import javax.swing.plaf.UIResource; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * JButton object that draws a scaled Arrow in one of the cardinal directions. | ||
| 36 | * <p> | ||
| 37 | * <strong>Warning:</strong> | ||
| 38 | * Serialized objects of this class will not be compatible with | ||
| 39 | * future Swing releases. The current serialization support is | ||
| 40 | * appropriate for short term storage or RMI between applications running | ||
| 41 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 42 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 43 | * has been added to the <code>java.beans</code> package. | ||
| 44 | * Please see {@link java.beans.XMLEncoder}. | ||
| 45 | * | ||
| 46 | * @author David Kloba | ||
| 47 | */ | ||
| 48 | public class BasicArrowButton extends JButton implements SwingConstants | ||
| 49 | { | ||
| 50 | /** | ||
| 51 | * The direction of the arrow. One of | ||
| 52 | * {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH}, | ||
| 53 | * {@code SwingConstants.EAST} or {@code SwingConstants.WEST}. | ||
| 54 | */ | ||
| 55 | protected int direction; | ||
| 56 | |||
| 57 | private Color shadow; | ||
| 58 | private Color darkShadow; | ||
| 59 | private Color highlight; | ||
| 60 | |||
| 61 | /** | ||
| 62 | * Creates a {@code BasicArrowButton} whose arrow | ||
| 63 | * is drawn in the specified direction and with the specified | ||
| 64 | * colors. | ||
| 65 | * | ||
| 66 | * @param direction the direction of the arrow; one of | ||
| 67 | * {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH}, | ||
| 68 | * {@code SwingConstants.EAST} or {@code SwingConstants.WEST} | ||
| 69 | * @param background the background color of the button | ||
| 70 | * @param shadow the color of the shadow | ||
| 71 | * @param darkShadow the color of the dark shadow | ||
| 72 | * @param highlight the color of the highlight | ||
| 73 | * @since 1.4 | ||
| 74 | */ | ||
| 75 | public BasicArrowButton(int direction, Color background, Color shadow, | ||
| 76 | Color darkShadow, Color highlight) { | ||
| 77 | super(); | ||
| 78 | setRequestFocusEnabled(false); | ||
| 79 | setDirection(direction); | ||
| 80 | setBackground(background); | ||
| 81 | this.shadow = shadow; | ||
| 82 | this.darkShadow = darkShadow; | ||
| 83 | this.highlight = highlight; | ||
| 84 | } | ||
| 85 | |||
| 86 | /** | ||
| 87 | * Creates a {@code BasicArrowButton} whose arrow | ||
| 88 | * is drawn in the specified direction. | ||
| 89 | * | ||
| 90 | * @param direction the direction of the arrow; one of | ||
| 91 | * {@code SwingConstants.NORTH}, {@code SwingConstants.SOUTH}, | ||
| 92 | * {@code SwingConstants.EAST} or {@code SwingConstants.WEST} | ||
| 93 | */ | ||
| 94 | public BasicArrowButton(int direction) { | ||
| 95 | this(direction, UIManager.getColor("control"), UIManager.getColor("controlShadow"), | ||
| 96 | UIManager.getColor("controlDkShadow"), UIManager.getColor("controlLtHighlight")); | ||
| 97 | } | ||
| 98 | |||
| 99 | /** | ||
| 100 | * Returns the direction of the arrow. | ||
| 101 | */ | ||
| 102 | public int getDirection() { | ||
| 103 | return direction; | ||
| 104 | } | ||
| 105 | |||
| 106 | /** | ||
| 107 | * Sets the direction of the arrow. | ||
| 108 | * | ||
| 109 | * @param direction the direction of the arrow; one of | ||
| 110 | * of {@code SwingConstants.NORTH}, | ||
| 111 | * {@code SwingConstants.SOUTH}, | ||
| 112 | * {@code SwingConstants.EAST} or {@code SwingConstants.WEST} | ||
| 113 | */ | ||
| 114 | public void setDirection(int direction) { | ||
| 115 | this.direction = direction; | ||
| 116 | } | ||
| 117 | |||
| 118 | public void paint(Graphics g) { | ||
| 119 | Color origColor; | ||
| 120 | boolean isPressed, isEnabled; | ||
| 121 | int w, h, size; | ||
| 122 | |||
| 123 | w = getSize().width; | ||
| 124 | h = getSize().height; | ||
| 125 | origColor = g.getColor(); | ||
| 126 | isPressed = getModel().isPressed(); | ||
| 127 | isEnabled = isEnabled(); | ||
| 128 | |||
| 129 | g.setColor(getBackground()); | ||
| 130 | g.fillRect(1, 1, w-2, h-2); | ||
| 131 | |||
| 132 | /// Draw the proper Border | ||
| 133 | if (getBorder() != null && !(getBorder() instanceof UIResource)) { | ||
| 134 | paintBorder(g); | ||
| 135 | } else if (isPressed) { | ||
| 136 | g.setColor(shadow); | ||
| 137 | g.drawRect(0, 0, w-1, h-1); | ||
| 138 | } else { | ||
| 139 | // Using the background color set above | ||
| 140 | g.drawLine(0, 0, 0, h-1); | ||
| 141 | g.drawLine(1, 0, w-2, 0); | ||
| 142 | |||
| 143 | g.setColor(highlight); // inner 3D border | ||
| 144 | g.drawLine(1, 1, 1, h-3); | ||
| 145 | g.drawLine(2, 1, w-3, 1); | ||
| 146 | |||
| 147 | g.setColor(shadow); // inner 3D border | ||
| 148 | g.drawLine(1, h-2, w-2, h-2); | ||
| 149 | g.drawLine(w-2, 1, w-2, h-3); | ||
| 150 | |||
| 151 | g.setColor(darkShadow); // black drop shadow __| | ||
| 152 | g.drawLine(0, h-1, w-1, h-1); | ||
| 153 | g.drawLine(w-1, h-1, w-1, 0); | ||
| 154 | } | ||
| 155 | |||
| 156 | // If there's no room to draw arrow, bail | ||
| 157 | if(h < 5 || w < 5) { | ||
| 158 | g.setColor(origColor); | ||
| 159 | return; | ||
| 160 | } | ||
| 161 | |||
| 162 | if (isPressed) { | ||
| 163 | g.translate(1, 1); | ||
| 164 | } | ||
| 165 | |||
| 166 | // Draw the arrow | ||
| 167 | size = Math.min((h - 4) / 3, (w - 4) / 3); | ||
| 168 | size = Math.max(size, 2); | ||
| 169 | paintTriangle(g, (w - size) / 2, (h - size) / 2, | ||
| 170 | size, direction, isEnabled); | ||
| 171 | |||
| 172 | // Reset the Graphics back to it's original settings | ||
| 173 | if (isPressed) { | ||
| 174 | g.translate(-1, -1); | ||
| 175 | } | ||
| 176 | g.setColor(origColor); | ||
| 177 | |||
| 178 | } | ||
| 179 | |||
| 180 | /** | ||
| 181 | * Returns the preferred size of the {@code BasicArrowButton}. | ||
| 182 | * | ||
| 183 | * @return the preferred size | ||
| 184 | */ | ||
| 185 | public Dimension getPreferredSize() { | ||
| 186 | return new Dimension(16, 16); | ||
| 187 | } | ||
| 188 | |||
| 189 | /** | ||
| 190 | * Returns the minimum size of the {@code BasicArrowButton}. | ||
| 191 | * | ||
| 192 | * @return the minimum size | ||
| 193 | */ | ||
| 194 | public Dimension getMinimumSize() { | ||
| 195 | return new Dimension(5, 5); | ||
| 196 | } | ||
| 197 | |||
| 198 | /** | ||
| 199 | * Returns the maximum size of the {@code BasicArrowButton}. | ||
| 200 | * | ||
| 201 | * @return the maximum size | ||
| 202 | */ | ||
| 203 | public Dimension getMaximumSize() { | ||
| 204 | return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); | ||
| 205 | } | ||
| 206 | |||
| 207 | /** | ||
| 208 | * Returns whether the arrow button should get the focus. | ||
| 209 | * {@code BasicArrowButton}s are used as a child component of | ||
| 210 | * composite components such as {@code JScrollBar} and | ||
| 211 | * {@code JComboBox}. Since the composite component typically gets the | ||
| 212 | * focus, this method is overriden to return {@code false}. | ||
| 213 | * | ||
| 214 | * @return {@code false} | ||
| 215 | */ | ||
| 216 | public boolean isFocusTraversable() { | ||
| 217 | return false; | ||
| 218 | } | ||
| 219 | |||
| 220 | /** | ||
| 221 | * Paints a triangle. | ||
| 222 | * | ||
| 223 | * @param g the {@code Graphics} to draw to | ||
| 224 | * @param x the x coordinate | ||
| 225 | * @param y the y coordinate | ||
| 226 | * @param size the size of the triangle to draw | ||
| 227 | * @param direction the direction in which to draw the arrow; | ||
| 228 | * one of {@code SwingConstants.NORTH}, | ||
| 229 | * {@code SwingConstants.SOUTH}, {@code SwingConstants.EAST} or | ||
| 230 | * {@code SwingConstants.WEST} | ||
| 231 | * @param isEnabled whether or not the arrow is drawn enabled | ||
| 232 | */ | ||
| 233 | public void paintTriangle(Graphics g, int x, int y, int size, | ||
| 234 | int direction, boolean isEnabled) { | ||
| 235 | Color oldColor = g.getColor(); | ||
| 236 | int mid, i, j; | ||
| 237 | |||
| 238 | j = 0; | ||
| 239 | size = Math.max(size, 2); | ||
| 240 | mid = (size / 2) - 1; | ||
| 241 | |||
| 242 | g.translate(x, y); | ||
| 243 | if(isEnabled) | ||
| 244 | g.setColor(darkShadow); | ||
| 245 | else | ||
| 246 | g.setColor(shadow); | ||
| 247 | |||
| 248 | switch(direction) { | ||
| 249 | case NORTH: | ||
| 250 | for(i = 0; i < size; i++) { | ||
| 251 | g.drawLine(mid-i, i, mid+i, i); | ||
| 252 | } | ||
| 253 | if(!isEnabled) { | ||
| 254 | g.setColor(highlight); | ||
| 255 | g.drawLine(mid-i+2, i, mid+i, i); | ||
| 256 | } | ||
| 257 | break; | ||
| 258 | case SOUTH: | ||
| 259 | if(!isEnabled) { | ||
| 260 | g.translate(1, 1); | ||
| 261 | g.setColor(highlight); | ||
| 262 | for(i = size-1; i >= 0; i--) { | ||
| 263 | g.drawLine(mid-i, j, mid+i, j); | ||
| 264 | j++; | ||
| 265 | } | ||
| 266 | g.translate(-1, -1); | ||
| 267 | g.setColor(shadow); | ||
| 268 | } | ||
| 269 | |||
| 270 | j = 0; | ||
| 271 | for(i = size-1; i >= 0; i--) { | ||
| 272 | g.drawLine(mid-i, j, mid+i, j); | ||
| 273 | j++; | ||
| 274 | } | ||
| 275 | break; | ||
| 276 | case WEST: | ||
| 277 | for(i = 0; i < size; i++) { | ||
| 278 | g.drawLine(i, mid-i, i, mid+i); | ||
| 279 | } | ||
| 280 | if(!isEnabled) { | ||
| 281 | g.setColor(highlight); | ||
| 282 | g.drawLine(i, mid-i+2, i, mid+i); | ||
| 283 | } | ||
| 284 | break; | ||
| 285 | case EAST: | ||
| 286 | if(!isEnabled) { | ||
| 287 | g.translate(1, 1); | ||
| 288 | g.setColor(highlight); | ||
| 289 | for(i = size-1; i >= 0; i--) { | ||
| 290 | g.drawLine(j, mid-i, j, mid+i); | ||
| 291 | j++; | ||
| 292 | } | ||
| 293 | g.translate(-1, -1); | ||
| 294 | g.setColor(shadow); | ||
| 295 | } | ||
| 296 | |||
| 297 | j = 0; | ||
| 298 | for(i = size-1; i >= 0; i--) { | ||
| 299 | g.drawLine(j, mid-i, j, mid+i); | ||
| 300 | j++; | ||
| 301 | } | ||
| 302 | break; | ||
| 303 | } | ||
| 304 | g.translate(-x, -y); | ||
| 305 | g.setColor(oldColor); | ||
| 306 | } | ||
| 307 | |||
| 308 | } | ||