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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, 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; | ||
| 27 | |||
| 28 | |||
| 29 | import javax.swing.border.*; | ||
| 30 | |||
| 31 | import java.awt.LayoutManager; | ||
| 32 | import java.awt.Component; | ||
| 33 | import java.awt.Container; | ||
| 34 | import java.awt.Rectangle; | ||
| 35 | import java.awt.Dimension; | ||
| 36 | import java.awt.Insets; | ||
| 37 | import java.io.Serializable; | ||
| 38 | |||
| 39 | |||
| 40 | /** | ||
| 41 | * The layout manager used by <code>JScrollPane</code>. | ||
| 42 | * <code>JScrollPaneLayout</code> is | ||
| 43 | * responsible for nine components: a viewport, two scrollbars, | ||
| 44 | * a row header, a column header, and four "corner" components. | ||
| 45 | * <p> | ||
| 46 | * <strong>Warning:</strong> | ||
| 47 | * Serialized objects of this class will not be compatible with | ||
| 48 | * future Swing releases. The current serialization support is | ||
| 49 | * appropriate for short term storage or RMI between applications running | ||
| 50 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 51 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 52 | * has been added to the <code>java.beans</code> package. | ||
| 53 | * Please see {@link java.beans.XMLEncoder}. | ||
| 54 | * | ||
| 55 | * @see JScrollPane | ||
| 56 | * @see JViewport | ||
| 57 | * | ||
| 58 | * @author Hans Muller | ||
| 59 | */ | ||
| 60 | public class ScrollPaneLayout | ||
| 61 | implements LayoutManager, ScrollPaneConstants, Serializable | ||
| 62 | { | ||
| 63 | |||
| 64 | /** | ||
| 65 | * The scrollpane's viewport child. | ||
| 66 | * Default is an empty <code>JViewport</code>. | ||
| 67 | * @see JScrollPane#setViewport | ||
| 68 | */ | ||
| 69 | protected JViewport viewport; | ||
| 70 | |||
| 71 | |||
| 72 | /** | ||
| 73 | * The scrollpane's vertical scrollbar child. | ||
| 74 | * Default is a <code>JScrollBar</code>. | ||
| 75 | * @see JScrollPane#setVerticalScrollBar | ||
| 76 | */ | ||
| 77 | protected JScrollBar vsb; | ||
| 78 | |||
| 79 | |||
| 80 | /** | ||
| 81 | * The scrollpane's horizontal scrollbar child. | ||
| 82 | * Default is a <code>JScrollBar</code>. | ||
| 83 | * @see JScrollPane#setHorizontalScrollBar | ||
| 84 | */ | ||
| 85 | protected JScrollBar hsb; | ||
| 86 | |||
| 87 | |||
| 88 | /** | ||
| 89 | * The row header child. Default is <code>null</code>. | ||
| 90 | * @see JScrollPane#setRowHeader | ||
| 91 | */ | ||
| 92 | protected JViewport rowHead; | ||
| 93 | |||
| 94 | |||
| 95 | /** | ||
| 96 | * The column header child. Default is <code>null</code>. | ||
| 97 | * @see JScrollPane#setColumnHeader | ||
| 98 | */ | ||
| 99 | protected JViewport colHead; | ||
| 100 | |||
| 101 | |||
| 102 | /** | ||
| 103 | * The component to display in the lower left corner. | ||
| 104 | * Default is <code>null</code>. | ||
| 105 | * @see JScrollPane#setCorner | ||
| 106 | */ | ||
| 107 | protected Component lowerLeft; | ||
| 108 | |||
| 109 | |||
| 110 | /** | ||
| 111 | * The component to display in the lower right corner. | ||
| 112 | * Default is <code>null</code>. | ||
| 113 | * @see JScrollPane#setCorner | ||
| 114 | */ | ||
| 115 | protected Component lowerRight; | ||
| 116 | |||
| 117 | |||
| 118 | /** | ||
| 119 | * The component to display in the upper left corner. | ||
| 120 | * Default is <code>null</code>. | ||
| 121 | * @see JScrollPane#setCorner | ||
| 122 | */ | ||
| 123 | protected Component upperLeft; | ||
| 124 | |||
| 125 | |||
| 126 | /** | ||
| 127 | * The component to display in the upper right corner. | ||
| 128 | * Default is <code>null</code>. | ||
| 129 | * @see JScrollPane#setCorner | ||
| 130 | */ | ||
| 131 | protected Component upperRight; | ||
| 132 | |||
| 133 | |||
| 134 | /** | ||
| 135 | * The display policy for the vertical scrollbar. | ||
| 136 | * The default is <code>ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED</code>. | ||
| 137 | * <p> | ||
| 138 | * This field is obsolete, please use the <code>JScrollPane</code> field instead. | ||
| 139 | * | ||
| 140 | * @see JScrollPane#setVerticalScrollBarPolicy | ||
| 141 | */ | ||
| 142 | protected int vsbPolicy = VERTICAL_SCROLLBAR_AS_NEEDED; | ||
| 143 | |||
| 144 | |||
| 145 | /** | ||
| 146 | * The display policy for the horizontal scrollbar. | ||
| 147 | * The default is <code>ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED</code>. | ||
| 148 | * <p> | ||
| 149 | * This field is obsolete, please use the <code>JScrollPane</code> field instead. | ||
| 150 | * | ||
| 151 | * @see JScrollPane#setHorizontalScrollBarPolicy | ||
| 152 | */ | ||
| 153 | protected int hsbPolicy = HORIZONTAL_SCROLLBAR_AS_NEEDED; | ||
| 154 | |||
| 155 | |||
| 156 | /** | ||
| 157 | * This method is invoked after the ScrollPaneLayout is set as the | ||
| 158 | * LayoutManager of a <code>JScrollPane</code>. | ||
| 159 | * It initializes all of the internal fields that | ||
| 160 | * are ordinarily set by <code>addLayoutComponent</code>. For example: | ||
| 161 | * <pre> | ||
| 162 | * ScrollPaneLayout mySPLayout = new ScrollPanelLayout() { | ||
| 163 | * public void layoutContainer(Container p) { | ||
| 164 | * super.layoutContainer(p); | ||
| 165 | * // do some extra work here ... | ||
| 166 | * } | ||
| 167 | * }; | ||
| 168 | * scrollpane.setLayout(mySPLayout): | ||
| 169 | * </pre> | ||
| 170 | */ | ||
| 171 | public void syncWithScrollPane(JScrollPane sp) { | ||
| 172 | viewport = sp.getViewport(); | ||
| 173 | vsb = sp.getVerticalScrollBar(); | ||
| 174 | hsb = sp.getHorizontalScrollBar(); | ||
| 175 | rowHead = sp.getRowHeader(); | ||
| 176 | colHead = sp.getColumnHeader(); | ||
| 177 | lowerLeft = sp.getCorner(LOWER_LEFT_CORNER); | ||
| 178 | lowerRight = sp.getCorner(LOWER_RIGHT_CORNER); | ||
| 179 | upperLeft = sp.getCorner(UPPER_LEFT_CORNER); | ||
| 180 | upperRight = sp.getCorner(UPPER_RIGHT_CORNER); | ||
| 181 | vsbPolicy = sp.getVerticalScrollBarPolicy(); | ||
| 182 | hsbPolicy = sp.getHorizontalScrollBarPolicy(); | ||
| 183 | } | ||
| 184 | |||
| 185 | |||
| 186 | /** | ||
| 187 | * Removes an existing component. When a new component, such as | ||
| 188 | * the left corner, or vertical scrollbar, is added, the old one, | ||
| 189 | * if it exists, must be removed. | ||
| 190 | * <p> | ||
| 191 | * This method returns <code>newC</code>. If <code>oldC</code> is | ||
| 192 | * not equal to <code>newC</code> and is non-<code>null</code>, | ||
| 193 | * it will be removed from its parent. | ||
| 194 | * | ||
| 195 | * @param oldC the <code>Component</code> to replace | ||
| 196 | * @param newC the <code>Component</code> to add | ||
| 197 | * @return the <code>newC</code> | ||
| 198 | */ | ||
| 199 | protected Component addSingletonComponent(Component oldC, Component newC) | ||
| 200 | { | ||
| 201 | if ((oldC != null) && (oldC != newC)) { | ||
| 202 | oldC.getParent().remove(oldC); | ||
| 203 | } | ||
| 204 | return newC; | ||
| 205 | } | ||
| 206 | |||
| 207 | |||
| 208 | /** | ||
| 209 | * Adds the specified component to the layout. The layout is | ||
| 210 | * identified using one of: | ||
| 211 | * <ul> | ||
| 212 | * <li>ScrollPaneConstants.VIEWPORT | ||
| 213 | * <li>ScrollPaneConstants.VERTICAL_SCROLLBAR | ||
| 214 | * <li>ScrollPaneConstants.HORIZONTAL_SCROLLBAR | ||
| 215 | * <li>ScrollPaneConstants.ROW_HEADER | ||
| 216 | * <li>ScrollPaneConstants.COLUMN_HEADER | ||
| 217 | * <li>ScrollPaneConstants.LOWER_LEFT_CORNER | ||
| 218 | * <li>ScrollPaneConstants.LOWER_RIGHT_CORNER | ||
| 219 | * <li>ScrollPaneConstants.UPPER_LEFT_CORNER | ||
| 220 | * <li>ScrollPaneConstants.UPPER_RIGHT_CORNER | ||
| 221 | * </ul> | ||
| 222 | * | ||
| 223 | * @param s the component identifier | ||
| 224 | * @param c the the component to be added | ||
| 225 | * @exception IllegalArgumentException if <code>s</code> is an invalid key | ||
| 226 | */ | ||
| 227 | public void addLayoutComponent(String s, Component c) | ||
| 228 | { | ||
| 229 | if (s.equals(VIEWPORT)) { | ||
| 230 | viewport = (JViewport)addSingletonComponent(viewport, c); | ||
| 231 | } | ||
| 232 | else if (s.equals(VERTICAL_SCROLLBAR)) { | ||
| 233 | vsb = (JScrollBar)addSingletonComponent(vsb, c); | ||
| 234 | } | ||
| 235 | else if (s.equals(HORIZONTAL_SCROLLBAR)) { | ||
| 236 | hsb = (JScrollBar)addSingletonComponent(hsb, c); | ||
| 237 | } | ||
| 238 | else if (s.equals(ROW_HEADER)) { | ||
| 239 | rowHead = (JViewport)addSingletonComponent(rowHead, c); | ||
| 240 | } | ||
| 241 | else if (s.equals(COLUMN_HEADER)) { | ||
| 242 | colHead = (JViewport)addSingletonComponent(colHead, c); | ||
| 243 | } | ||
| 244 | else if (s.equals(LOWER_LEFT_CORNER)) { | ||
| 245 | lowerLeft = addSingletonComponent(lowerLeft, c); | ||
| 246 | } | ||
| 247 | else if (s.equals(LOWER_RIGHT_CORNER)) { | ||
| 248 | lowerRight = addSingletonComponent(lowerRight, c); | ||
| 249 | } | ||
| 250 | else if (s.equals(UPPER_LEFT_CORNER)) { | ||
| 251 | upperLeft = addSingletonComponent(upperLeft, c); | ||
| 252 | } | ||
| 253 | else if (s.equals(UPPER_RIGHT_CORNER)) { | ||
| 254 | upperRight = addSingletonComponent(upperRight, c); | ||
| 255 | } | ||
| 256 | else { | ||
| 257 | throw new IllegalArgumentException("invalid layout key " + s); | ||
| 258 | } | ||
| 259 | } | ||
| 260 | |||
| 261 | |||
| 262 | /** | ||
| 263 | * Removes the specified component from the layout. | ||
| 264 | * | ||
| 265 | * @param c the component to remove | ||
| 266 | */ | ||
| 267 | public void removeLayoutComponent(Component c) | ||
| 268 | { | ||
| 269 | if (c == viewport) { | ||
| 270 | viewport = null; | ||
| 271 | } | ||
| 272 | else if (c == vsb) { | ||
| 273 | vsb = null; | ||
| 274 | } | ||
| 275 | else if (c == hsb) { | ||
| 276 | hsb = null; | ||
| 277 | } | ||
| 278 | else if (c == rowHead) { | ||
| 279 | rowHead = null; | ||
| 280 | } | ||
| 281 | else if (c == colHead) { | ||
| 282 | colHead = null; | ||
| 283 | } | ||
| 284 | else if (c == lowerLeft) { | ||
| 285 | lowerLeft = null; | ||
| 286 | } | ||
| 287 | else if (c == lowerRight) { | ||
| 288 | lowerRight = null; | ||
| 289 | } | ||
| 290 | else if (c == upperLeft) { | ||
| 291 | upperLeft = null; | ||
| 292 | } | ||
| 293 | else if (c == upperRight) { | ||
| 294 | upperRight = null; | ||
| 295 | } | ||
| 296 | } | ||
| 297 | |||
| 298 | |||
| 299 | /** | ||
| 300 | * Returns the vertical scrollbar-display policy. | ||
| 301 | * | ||
| 302 | * @return an integer giving the display policy | ||
| 303 | * @see #setVerticalScrollBarPolicy | ||
| 304 | */ | ||
| 305 | public int getVerticalScrollBarPolicy() { | ||
| 306 | return vsbPolicy; | ||
| 307 | } | ||
| 308 | |||
| 309 | |||
| 310 | /** | ||
| 311 | * Sets the vertical scrollbar-display policy. The options | ||
| 312 | * are: | ||
| 313 | * <ul> | ||
| 314 | * <li>ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED | ||
| 315 | * <li>ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER | ||
| 316 | * <li>ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS | ||
| 317 | * </ul> | ||
| 318 | * Note: Applications should use the <code>JScrollPane</code> version | ||
| 319 | * of this method. It only exists for backwards compatibility | ||
| 320 | * with the Swing 1.0.2 (and earlier) versions of this class. | ||
| 321 | * | ||
| 322 | * @param x an integer giving the display policy | ||
| 323 | * @exception IllegalArgumentException if <code>x</code> is an invalid | ||
| 324 | * vertical scroll bar policy, as listed above | ||
| 325 | */ | ||
| 326 | public void setVerticalScrollBarPolicy(int x) { | ||
| 327 | switch (x) { | ||
| 328 | case VERTICAL_SCROLLBAR_AS_NEEDED: | ||
| 329 | case VERTICAL_SCROLLBAR_NEVER: | ||
| 330 | case VERTICAL_SCROLLBAR_ALWAYS: | ||
| 331 | vsbPolicy = x; | ||
| 332 | break; | ||
| 333 | default: | ||
| 334 | throw new IllegalArgumentException("invalid verticalScrollBarPolicy"); | ||
| 335 | } | ||
| 336 | } | ||
| 337 | |||
| 338 | |||
| 339 | /** | ||
| 340 | * Returns the horizontal scrollbar-display policy. | ||
| 341 | * | ||
| 342 | * @return an integer giving the display policy | ||
| 343 | * @see #setHorizontalScrollBarPolicy | ||
| 344 | */ | ||
| 345 | public int getHorizontalScrollBarPolicy() { | ||
| 346 | return hsbPolicy; | ||
| 347 | } | ||
| 348 | |||
| 349 | /** | ||
| 350 | * Sets the horizontal scrollbar-display policy. | ||
| 351 | * The options are:<ul> | ||
| 352 | * <li>ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED | ||
| 353 | * <li>ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER | ||
| 354 | * <li>ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS | ||
| 355 | * </ul> | ||
| 356 | * Note: Applications should use the <code>JScrollPane</code> version | ||
| 357 | * of this method. It only exists for backwards compatibility | ||
| 358 | * with the Swing 1.0.2 (and earlier) versions of this class. | ||
| 359 | * | ||
| 360 | * @param x an int giving the display policy | ||
| 361 | * @exception IllegalArgumentException if <code>x</code> is not a valid | ||
| 362 | * horizontal scrollbar policy, as listed above | ||
| 363 | */ | ||
| 364 | public void setHorizontalScrollBarPolicy(int x) { | ||
| 365 | switch (x) { | ||
| 366 | case HORIZONTAL_SCROLLBAR_AS_NEEDED: | ||
| 367 | case HORIZONTAL_SCROLLBAR_NEVER: | ||
| 368 | case HORIZONTAL_SCROLLBAR_ALWAYS: | ||
| 369 | hsbPolicy = x; | ||
| 370 | break; | ||
| 371 | default: | ||
| 372 | throw new IllegalArgumentException("invalid horizontalScrollBarPolicy"); | ||
| 373 | } | ||
| 374 | } | ||
| 375 | |||
| 376 | |||
| 377 | /** | ||
| 378 | * Returns the <code>JViewport</code> object that displays the | ||
| 379 | * scrollable contents. | ||
| 380 | * @return the <code>JViewport</code> object that displays the scrollable contents | ||
| 381 | * @see JScrollPane#getViewport | ||
| 382 | */ | ||
| 383 | public JViewport getViewport() { | ||
| 384 | return viewport; | ||
| 385 | } | ||
| 386 | |||
| 387 | |||
| 388 | /** | ||
| 389 | * Returns the <code>JScrollBar</code> object that handles horizontal scrolling. | ||
| 390 | * @return the <code>JScrollBar</code> object that handles horizontal scrolling | ||
| 391 | * @see JScrollPane#getHorizontalScrollBar | ||
| 392 | */ | ||
| 393 | public JScrollBar getHorizontalScrollBar() { | ||
| 394 | return hsb; | ||
| 395 | } | ||
| 396 | |||
| 397 | /** | ||
| 398 | * Returns the <code>JScrollBar</code> object that handles vertical scrolling. | ||
| 399 | * @return the <code>JScrollBar</code> object that handles vertical scrolling | ||
| 400 | * @see JScrollPane#getVerticalScrollBar | ||
| 401 | */ | ||
| 402 | public JScrollBar getVerticalScrollBar() { | ||
| 403 | return vsb; | ||
| 404 | } | ||
| 405 | |||
| 406 | |||
| 407 | /** | ||
| 408 | * Returns the <code>JViewport</code> object that is the row header. | ||
| 409 | * @return the <code>JViewport</code> object that is the row header | ||
| 410 | * @see JScrollPane#getRowHeader | ||
| 411 | */ | ||
| 412 | public JViewport getRowHeader() { | ||
| 413 | return rowHead; | ||
| 414 | } | ||
| 415 | |||
| 416 | |||
| 417 | /** | ||
| 418 | * Returns the <code>JViewport</code> object that is the column header. | ||
| 419 | * @return the <code>JViewport</code> object that is the column header | ||
| 420 | * @see JScrollPane#getColumnHeader | ||
| 421 | */ | ||
| 422 | public JViewport getColumnHeader() { | ||
| 423 | return colHead; | ||
| 424 | } | ||
| 425 | |||
| 426 | |||
| 427 | /** | ||
| 428 | * Returns the <code>Component</code> at the specified corner. | ||
| 429 | * @param key the <code>String</code> specifying the corner | ||
| 430 | * @return the <code>Component</code> at the specified corner, as defined in | ||
| 431 | * {@link ScrollPaneConstants}; if <code>key</code> is not one of the | ||
| 432 | * four corners, <code>null</code> is returned | ||
| 433 | * @see JScrollPane#getCorner | ||
| 434 | */ | ||
| 435 | public Component getCorner(String key) { | ||
| 436 | if (key.equals(LOWER_LEFT_CORNER)) { | ||
| 437 | return lowerLeft; | ||
| 438 | } | ||
| 439 | else if (key.equals(LOWER_RIGHT_CORNER)) { | ||
| 440 | return lowerRight; | ||
| 441 | } | ||
| 442 | else if (key.equals(UPPER_LEFT_CORNER)) { | ||
| 443 | return upperLeft; | ||
| 444 | } | ||
| 445 | else if (key.equals(UPPER_RIGHT_CORNER)) { | ||
| 446 | return upperRight; | ||
| 447 | } | ||
| 448 | else { | ||
| 449 | return null; | ||
| 450 | } | ||
| 451 | } | ||
| 452 | |||
| 453 | |||
| 454 | /** | ||
| 455 | * The preferred size of a <code>ScrollPane</code> is the size of the insets, | ||
| 456 | * plus the preferred size of the viewport, plus the preferred size of | ||
| 457 | * the visible headers, plus the preferred size of the scrollbars | ||
| 458 | * that will appear given the current view and the current | ||
| 459 | * scrollbar displayPolicies. | ||
| 460 | * <p>Note that the rowHeader is calculated as part of the preferred width | ||
| 461 | * and the colHeader is calculated as part of the preferred size. | ||
| 462 | * | ||
| 463 | * @param parent the <code>Container</code> that will be laid out | ||
| 464 | * @return a <code>Dimension</code> object specifying the preferred size of the | ||
| 465 | * viewport and any scrollbars | ||
| 466 | * @see ViewportLayout | ||
| 467 | * @see LayoutManager | ||
| 468 | */ | ||
| 469 | public Dimension preferredLayoutSize(Container parent) | ||
| 470 | { | ||
| 471 | /* Sync the (now obsolete) policy fields with the | ||
| 472 | * JScrollPane. | ||
| 473 | */ | ||
| 474 | JScrollPane scrollPane = (JScrollPane)parent; | ||
| 475 | vsbPolicy = scrollPane.getVerticalScrollBarPolicy(); | ||
| 476 | hsbPolicy = scrollPane.getHorizontalScrollBarPolicy(); | ||
| 477 | |||
| 478 | Insets insets = parent.getInsets(); | ||
| 479 | int prefWidth = insets.left + insets.right; | ||
| 480 | int prefHeight = insets.top + insets.bottom; | ||
| 481 | |||
| 482 | /* Note that viewport.getViewSize() is equivalent to | ||
| 483 | * viewport.getView().getPreferredSize() modulo a null | ||
| 484 | * view or a view whose size was explicitly set. | ||
| 485 | */ | ||
| 486 | |||
| 487 | Dimension extentSize = null; | ||
| 488 | Dimension viewSize = null; | ||
| 489 | Component view = null; | ||
| 490 | |||
| 491 | if (viewport != null) { | ||
| 492 | extentSize = viewport.getPreferredSize(); | ||
| 493 | view = viewport.getView(); | ||
| 494 | if (view != null) { | ||
| 495 | viewSize = view.getPreferredSize(); | ||
| 496 | } else { | ||
| 497 | viewSize = new Dimension(0, 0); | ||
| 498 | } | ||
| 499 | } | ||
| 500 | |||
| 501 | /* If there's a viewport add its preferredSize. | ||
| 502 | */ | ||
| 503 | |||
| 504 | if (extentSize != null) { | ||
| 505 | prefWidth += extentSize.width; | ||
| 506 | prefHeight += extentSize.height; | ||
| 507 | } | ||
| 508 | |||
| 509 | /* If there's a JScrollPane.viewportBorder, add its insets. | ||
| 510 | */ | ||
| 511 | |||
| 512 | Border viewportBorder = scrollPane.getViewportBorder(); | ||
| 513 | if (viewportBorder != null) { | ||
| 514 | Insets vpbInsets = viewportBorder.getBorderInsets(parent); | ||
| 515 | prefWidth += vpbInsets.left + vpbInsets.right; | ||
| 516 | prefHeight += vpbInsets.top + vpbInsets.bottom; | ||
| 517 | } | ||
| 518 | |||
| 519 | /* If a header exists and it's visible, factor its | ||
| 520 | * preferred size in. | ||
| 521 | */ | ||
| 522 | |||
| 523 | if ((rowHead != null) && rowHead.isVisible()) { | ||
| 524 | prefWidth += rowHead.getPreferredSize().width; | ||
| 525 | } | ||
| 526 | |||
| 527 | if ((colHead != null) && colHead.isVisible()) { | ||
| 528 | prefHeight += colHead.getPreferredSize().height; | ||
| 529 | } | ||
| 530 | |||
| 531 | /* If a scrollbar is going to appear, factor its preferred size in. | ||
| 532 | * If the scrollbars policy is AS_NEEDED, this can be a little | ||
| 533 | * tricky: | ||
| 534 | * | ||
| 535 | * - If the view is a Scrollable then scrollableTracksViewportWidth | ||
| 536 | * and scrollableTracksViewportHeight can be used to effectively | ||
| 537 | * disable scrolling (if they're true) in their respective dimensions. | ||
| 538 | * | ||
| 539 | * - Assuming that a scrollbar hasn't been disabled by the | ||
| 540 | * previous constraint, we need to decide if the scrollbar is going | ||
| 541 | * to appear to correctly compute the JScrollPanes preferred size. | ||
| 542 | * To do this we compare the preferredSize of the viewport (the | ||
| 543 | * extentSize) to the preferredSize of the view. Although we're | ||
| 544 | * not responsible for laying out the view we'll assume that the | ||
| 545 | * JViewport will always give it its preferredSize. | ||
| 546 | */ | ||
| 547 | |||
| 548 | if ((vsb != null) && (vsbPolicy != VERTICAL_SCROLLBAR_NEVER)) { | ||
| 549 | if (vsbPolicy == VERTICAL_SCROLLBAR_ALWAYS) { | ||
| 550 | prefWidth += vsb.getPreferredSize().width; | ||
| 551 | } | ||
| 552 | else if ((viewSize != null) && (extentSize != null)) { | ||
| 553 | boolean canScroll = true; | ||
| 554 | if (view instanceof Scrollable) { | ||
| 555 | canScroll = !((Scrollable)view).getScrollableTracksViewportHeight(); | ||
| 556 | } | ||
| 557 | if (canScroll && (viewSize.height > extentSize.height)) { | ||
| 558 | prefWidth += vsb.getPreferredSize().width; | ||
| 559 | } | ||
| 560 | } | ||
| 561 | } | ||
| 562 | |||
| 563 | if ((hsb != null) && (hsbPolicy != HORIZONTAL_SCROLLBAR_NEVER)) { | ||
| 564 | if (hsbPolicy == HORIZONTAL_SCROLLBAR_ALWAYS) { | ||
| 565 | prefHeight += hsb.getPreferredSize().height; | ||
| 566 | } | ||
| 567 | else if ((viewSize != null) && (extentSize != null)) { | ||
| 568 | boolean canScroll = true; | ||
| 569 | if (view instanceof Scrollable) { | ||
| 570 | canScroll = !((Scrollable)view).getScrollableTracksViewportWidth(); | ||
| 571 | } | ||
| 572 | if (canScroll && (viewSize.width > extentSize.width)) { | ||
| 573 | prefHeight += hsb.getPreferredSize().height; | ||
| 574 | } | ||
| 575 | } | ||
| 576 | } | ||
| 577 | |||
| 578 | return new Dimension(prefWidth, prefHeight); | ||
| 579 | } | ||
| 580 | |||
| 581 | |||
| 582 | /** | ||
| 583 | * The minimum size of a <code>ScrollPane</code> is the size of the insets | ||
| 584 | * plus minimum size of the viewport, plus the scrollpane's | ||
| 585 | * viewportBorder insets, plus the minimum size | ||
| 586 | * of the visible headers, plus the minimum size of the | ||
| 587 | * scrollbars whose displayPolicy isn't NEVER. | ||
| 588 | * | ||
| 589 | * @param parent the <code>Container</code> that will be laid out | ||
| 590 | * @return a <code>Dimension</code> object specifying the minimum size | ||
| 591 | */ | ||
| 592 | public Dimension minimumLayoutSize(Container parent) | ||
| 593 | { | ||
| 594 | /* Sync the (now obsolete) policy fields with the | ||
| 595 | * JScrollPane. | ||
| 596 | */ | ||
| 597 | JScrollPane scrollPane = (JScrollPane)parent; | ||
| 598 | vsbPolicy = scrollPane.getVerticalScrollBarPolicy(); | ||
| 599 | hsbPolicy = scrollPane.getHorizontalScrollBarPolicy(); | ||
| 600 | |||
| 601 | Insets insets = parent.getInsets(); | ||
| 602 | int minWidth = insets.left + insets.right; | ||
| 603 | int minHeight = insets.top + insets.bottom; | ||
| 604 | |||
| 605 | /* If there's a viewport add its minimumSize. | ||
| 606 | */ | ||
| 607 | |||
| 608 | if (viewport != null) { | ||
| 609 | Dimension size = viewport.getMinimumSize(); | ||
| 610 | minWidth += size.width; | ||
| 611 | minHeight += size.height; | ||
| 612 | } | ||
| 613 | |||
| 614 | /* If there's a JScrollPane.viewportBorder, add its insets. | ||
| 615 | */ | ||
| 616 | |||
| 617 | Border viewportBorder = scrollPane.getViewportBorder(); | ||
| 618 | if (viewportBorder != null) { | ||
| 619 | Insets vpbInsets = viewportBorder.getBorderInsets(parent); | ||
| 620 | minWidth += vpbInsets.left + vpbInsets.right; | ||
| 621 | minHeight += vpbInsets.top + vpbInsets.bottom; | ||
| 622 | } | ||
| 623 | |||
| 624 | /* If a header exists and it's visible, factor its | ||
| 625 | * minimum size in. | ||
| 626 | */ | ||
| 627 | |||
| 628 | if ((rowHead != null) && rowHead.isVisible()) { | ||
| 629 | Dimension size = rowHead.getMinimumSize(); | ||
| 630 | minWidth += size.width; | ||
| 631 | minHeight = Math.max(minHeight, size.height); | ||
| 632 | } | ||
| 633 | |||
| 634 | if ((colHead != null) && colHead.isVisible()) { | ||
| 635 | Dimension size = colHead.getMinimumSize(); | ||
| 636 | minWidth = Math.max(minWidth, size.width); | ||
| 637 | minHeight += size.height; | ||
| 638 | } | ||
| 639 | |||
| 640 | /* If a scrollbar might appear, factor its minimum | ||
| 641 | * size in. | ||
| 642 | */ | ||
| 643 | |||
| 644 | if ((vsb != null) && (vsbPolicy != VERTICAL_SCROLLBAR_NEVER)) { | ||
| 645 | Dimension size = vsb.getMinimumSize(); | ||
| 646 | minWidth += size.width; | ||
| 647 | minHeight = Math.max(minHeight, size.height); | ||
| 648 | } | ||
| 649 | |||
| 650 | if ((hsb != null) && (hsbPolicy != HORIZONTAL_SCROLLBAR_NEVER)) { | ||
| 651 | Dimension size = hsb.getMinimumSize(); | ||
| 652 | minWidth = Math.max(minWidth, size.width); | ||
| 653 | minHeight += size.height; | ||
| 654 | } | ||
| 655 | |||
| 656 | return new Dimension(minWidth, minHeight); | ||
| 657 | } | ||
| 658 | |||
| 659 | |||
| 660 | /** | ||
| 661 | * Lays out the scrollpane. The positioning of components depends on | ||
| 662 | * the following constraints: | ||
| 663 | * <ul> | ||
| 664 | * <li> The row header, if present and visible, gets its preferred | ||
| 665 | * width and the viewport's height. | ||
| 666 | * | ||
| 667 | * <li> The column header, if present and visible, gets its preferred | ||
| 668 | * height and the viewport's width. | ||
| 669 | * | ||
| 670 | * <li> If a vertical scrollbar is needed, i.e. if the viewport's extent | ||
| 671 | * height is smaller than its view height or if the <code>displayPolicy</code> | ||
| 672 | * is ALWAYS, it's treated like the row header with respect to its | ||
| 673 | * dimensions and is made visible. | ||
| 674 | * | ||
| 675 | * <li> If a horizontal scrollbar is needed, it is treated like the | ||
| 676 | * column header (see the paragraph above regarding the vertical scrollbar). | ||
| 677 | * | ||
| 678 | * <li> If the scrollpane has a non-<code>null</code> | ||
| 679 | * <code>viewportBorder</code>, then space is allocated for that. | ||
| 680 | * | ||
| 681 | * <li> The viewport gets the space available after accounting for | ||
| 682 | * the previous constraints. | ||
| 683 | * | ||
| 684 | * <li> The corner components, if provided, are aligned with the | ||
| 685 | * ends of the scrollbars and headers. If there is a vertical | ||
| 686 | * scrollbar, the right corners appear; if there is a horizontal | ||
| 687 | * scrollbar, the lower corners appear; a row header gets left | ||
| 688 | * corners, and a column header gets upper corners. | ||
| 689 | * </ul> | ||
| 690 | * | ||
| 691 | * @param parent the <code>Container</code> to lay out | ||
| 692 | */ | ||
| 693 | public void layoutContainer(Container parent) | ||
| 694 | { | ||
| 695 | /* Sync the (now obsolete) policy fields with the | ||
| 696 | * JScrollPane. | ||
| 697 | */ | ||
| 698 | JScrollPane scrollPane = (JScrollPane)parent; | ||
| 699 | vsbPolicy = scrollPane.getVerticalScrollBarPolicy(); | ||
| 700 | hsbPolicy = scrollPane.getHorizontalScrollBarPolicy(); | ||
| 701 | |||
| 702 | Rectangle availR = scrollPane.getBounds(); | ||
| 703 | availR.x = availR.y = 0; | ||
| 704 | |||
| 705 | Insets insets = parent.getInsets(); | ||
| 706 | availR.x = insets.left; | ||
| 707 | availR.y = insets.top; | ||
| 708 | availR.width -= insets.left + insets.right; | ||
| 709 | availR.height -= insets.top + insets.bottom; | ||
| 710 | |||
| 711 | /* Get the scrollPane's orientation. | ||
| 712 | */ | ||
| 713 | boolean leftToRight = SwingUtilities.isLeftToRight(scrollPane); | ||
| 714 | |||
| 715 | /* If there's a visible column header remove the space it | ||
| 716 | * needs from the top of availR. The column header is treated | ||
| 717 | * as if it were fixed height, arbitrary width. | ||
| 718 | */ | ||
| 719 | |||
| 720 | Rectangle colHeadR = new Rectangle(0, availR.y, 0, 0); | ||
| 721 | |||
| 722 | if ((colHead != null) && (colHead.isVisible())) { | ||
| 723 | int colHeadHeight = Math.min(availR.height, | ||
| 724 | colHead.getPreferredSize().height); | ||
| 725 | colHeadR.height = colHeadHeight; | ||
| 726 | availR.y += colHeadHeight; | ||
| 727 | availR.height -= colHeadHeight; | ||
| 728 | } | ||
| 729 | |||
| 730 | /* If there's a visible row header remove the space it needs | ||
| 731 | * from the left or right of availR. The row header is treated | ||
| 732 | * as if it were fixed width, arbitrary height. | ||
| 733 | */ | ||
| 734 | |||
| 735 | Rectangle rowHeadR = new Rectangle(0, 0, 0, 0); | ||
| 736 | |||
| 737 | if ((rowHead != null) && (rowHead.isVisible())) { | ||
| 738 | int rowHeadWidth = Math.min(availR.width, | ||
| 739 | rowHead.getPreferredSize().width); | ||
| 740 | rowHeadR.width = rowHeadWidth; | ||
| 741 | availR.width -= rowHeadWidth; | ||
| 742 | if ( leftToRight ) { | ||
| 743 | rowHeadR.x = availR.x; | ||
| 744 | availR.x += rowHeadWidth; | ||
| 745 | } else { | ||
| 746 | rowHeadR.x = availR.x + availR.width; | ||
| 747 | } | ||
| 748 | } | ||
| 749 | |||
| 750 | /* If there's a JScrollPane.viewportBorder, remove the | ||
| 751 | * space it occupies for availR. | ||
| 752 | */ | ||
| 753 | |||
| 754 | Border viewportBorder = scrollPane.getViewportBorder(); | ||
| 755 | Insets vpbInsets; | ||
| 756 | if (viewportBorder != null) { | ||
| 757 | vpbInsets = viewportBorder.getBorderInsets(parent); | ||
| 758 | availR.x += vpbInsets.left; | ||
| 759 | availR.y += vpbInsets.top; | ||
| 760 | availR.width -= vpbInsets.left + vpbInsets.right; | ||
| 761 | availR.height -= vpbInsets.top + vpbInsets.bottom; | ||
| 762 | } | ||
| 763 | else { | ||
| 764 | vpbInsets = new Insets(0,0,0,0); | ||
| 765 | } | ||
| 766 | |||
| 767 | |||
| 768 | /* At this point availR is the space available for the viewport | ||
| 769 | * and scrollbars. rowHeadR is correct except for its height and y | ||
| 770 | * and colHeadR is correct except for its width and x. Once we're | ||
| 771 | * through computing the dimensions of these three parts we can | ||
| 772 | * go back and set the dimensions of rowHeadR.height, rowHeadR.y, | ||
| 773 | * colHeadR.width, colHeadR.x and the bounds for the corners. | ||
| 774 | * | ||
| 775 | * We'll decide about putting up scrollbars by comparing the | ||
| 776 | * viewport views preferred size with the viewports extent | ||
| 777 | * size (generally just its size). Using the preferredSize is | ||
| 778 | * reasonable because layout proceeds top down - so we expect | ||
| 779 | * the viewport to be laid out next. And we assume that the | ||
| 780 | * viewports layout manager will give the view it's preferred | ||
| 781 | * size. One exception to this is when the view implements | ||
| 782 | * Scrollable and Scrollable.getViewTracksViewport{Width,Height} | ||
| 783 | * methods return true. If the view is tracking the viewports | ||
| 784 | * width we don't bother with a horizontal scrollbar, similarly | ||
| 785 | * if view.getViewTracksViewport(Height) is true we don't bother | ||
| 786 | * with a vertical scrollbar. | ||
| 787 | */ | ||
| 788 | |||
| 789 | Component view = (viewport != null) ? viewport.getView() : null; | ||
| 790 | Dimension viewPrefSize = | ||
| 791 | (view != null) ? view.getPreferredSize() | ||
| 792 | : new Dimension(0,0); | ||
| 793 | |||
| 794 | Dimension extentSize = | ||
| 795 | (viewport != null) ? viewport.toViewCoordinates(availR.getSize()) | ||
| 796 | : new Dimension(0,0); | ||
| 797 | |||
| 798 | boolean viewTracksViewportWidth = false; | ||
| 799 | boolean viewTracksViewportHeight = false; | ||
| 800 | boolean isEmpty = (availR.width < 0 || availR.height < 0); | ||
| 801 | Scrollable sv; | ||
| 802 | // Don't bother checking the Scrollable methods if there is no room | ||
| 803 | // for the viewport, we aren't going to show any scrollbars in this | ||
| 804 | // case anyway. | ||
| 805 | if (!isEmpty && view instanceof Scrollable) { | ||
| 806 | sv = (Scrollable)view; | ||
| 807 | viewTracksViewportWidth = sv.getScrollableTracksViewportWidth(); | ||
| 808 | viewTracksViewportHeight = sv.getScrollableTracksViewportHeight(); | ||
| 809 | } | ||
| 810 | else { | ||
| 811 | sv = null; | ||
| 812 | } | ||
| 813 | |||
| 814 | /* If there's a vertical scrollbar and we need one, allocate | ||
| 815 | * space for it (we'll make it visible later). A vertical | ||
| 816 | * scrollbar is considered to be fixed width, arbitrary height. | ||
| 817 | */ | ||
| 818 | |||
| 819 | Rectangle vsbR = new Rectangle(0, availR.y - vpbInsets.top, 0, 0); | ||
| 820 | |||
| 821 | boolean vsbNeeded; | ||
| 822 | if (isEmpty) { | ||
| 823 | vsbNeeded = false; | ||
| 824 | } | ||
| 825 | else if (vsbPolicy == VERTICAL_SCROLLBAR_ALWAYS) { | ||
| 826 | vsbNeeded = true; | ||
| 827 | } | ||
| 828 | else if (vsbPolicy == VERTICAL_SCROLLBAR_NEVER) { | ||
| 829 | vsbNeeded = false; | ||
| 830 | } | ||
| 831 | else { // vsbPolicy == VERTICAL_SCROLLBAR_AS_NEEDED | ||
| 832 | vsbNeeded = !viewTracksViewportHeight && (viewPrefSize.height > extentSize.height); | ||
| 833 | } | ||
| 834 | |||
| 835 | |||
| 836 | if ((vsb != null) && vsbNeeded) { | ||
| 837 | adjustForVSB(true, availR, vsbR, vpbInsets, leftToRight); | ||
| 838 | extentSize = viewport.toViewCoordinates(availR.getSize()); | ||
| 839 | } | ||
| 840 | |||
| 841 | /* If there's a horizontal scrollbar and we need one, allocate | ||
| 842 | * space for it (we'll make it visible later). A horizontal | ||
| 843 | * scrollbar is considered to be fixed height, arbitrary width. | ||
| 844 | */ | ||
| 845 | |||
| 846 | Rectangle hsbR = new Rectangle(availR.x - vpbInsets.left, 0, 0, 0); | ||
| 847 | boolean hsbNeeded; | ||
| 848 | if (isEmpty) { | ||
| 849 | hsbNeeded = false; | ||
| 850 | } | ||
| 851 | else if (hsbPolicy == HORIZONTAL_SCROLLBAR_ALWAYS) { | ||
| 852 | hsbNeeded = true; | ||
| 853 | } | ||
| 854 | else if (hsbPolicy == HORIZONTAL_SCROLLBAR_NEVER) { | ||
| 855 | hsbNeeded = false; | ||
| 856 | } | ||
| 857 | else { // hsbPolicy == HORIZONTAL_SCROLLBAR_AS_NEEDED | ||
| 858 | hsbNeeded = !viewTracksViewportWidth && (viewPrefSize.width > extentSize.width); | ||
| 859 | } | ||
| 860 | |||
| 861 | if ((hsb != null) && hsbNeeded) { | ||
| 862 | adjustForHSB(true, availR, hsbR, vpbInsets); | ||
| 863 | |||
| 864 | /* If we added the horizontal scrollbar then we've implicitly | ||
| 865 | * reduced the vertical space available to the viewport. | ||
| 866 | * As a consequence we may have to add the vertical scrollbar, | ||
| 867 | * if that hasn't been done so already. Of course we | ||
| 868 | * don't bother with any of this if the vsbPolicy is NEVER. | ||
| 869 | */ | ||
| 870 | if ((vsb != null) && !vsbNeeded && | ||
| 871 | (vsbPolicy != VERTICAL_SCROLLBAR_NEVER)) { | ||
| 872 | |||
| 873 | extentSize = viewport.toViewCoordinates(availR.getSize()); | ||
| 874 | vsbNeeded = viewPrefSize.height > extentSize.height; | ||
| 875 | |||
| 876 | if (vsbNeeded) { | ||
| 877 | adjustForVSB(true, availR, vsbR, vpbInsets, leftToRight); | ||
| 878 | } | ||
| 879 | } | ||
| 880 | } | ||
| 881 | |||
| 882 | /* Set the size of the viewport first, and then recheck the Scrollable | ||
| 883 | * methods. Some components base their return values for the Scrollable | ||
| 884 | * methods on the size of the Viewport, so that if we don't | ||
| 885 | * ask after resetting the bounds we may have gotten the wrong | ||
| 886 | * answer. | ||
| 887 | */ | ||
| 888 | |||
| 889 | if (viewport != null) { | ||
| 890 | viewport.setBounds(availR); | ||
| 891 | |||
| 892 | if (sv != null) { | ||
| 893 | extentSize = viewport.toViewCoordinates(availR.getSize()); | ||
| 894 | |||
| 895 | boolean oldHSBNeeded = hsbNeeded; | ||
| 896 | boolean oldVSBNeeded = vsbNeeded; | ||
| 897 | viewTracksViewportWidth = sv. | ||
| 898 | getScrollableTracksViewportWidth(); | ||
| 899 | viewTracksViewportHeight = sv. | ||
| 900 | getScrollableTracksViewportHeight(); | ||
| 901 | if (vsb != null && vsbPolicy == VERTICAL_SCROLLBAR_AS_NEEDED) { | ||
| 902 | boolean newVSBNeeded = !viewTracksViewportHeight && | ||
| 903 | (viewPrefSize.height > extentSize.height); | ||
| 904 | if (newVSBNeeded != vsbNeeded) { | ||
| 905 | vsbNeeded = newVSBNeeded; | ||
| 906 | adjustForVSB(vsbNeeded, availR, vsbR, vpbInsets, | ||
| 907 | leftToRight); | ||
| 908 | extentSize = viewport.toViewCoordinates | ||
| 909 | (availR.getSize()); | ||
| 910 | } | ||
| 911 | } | ||
| 912 | if (hsb != null && hsbPolicy ==HORIZONTAL_SCROLLBAR_AS_NEEDED){ | ||
| 913 | boolean newHSBbNeeded = !viewTracksViewportWidth && | ||
| 914 | (viewPrefSize.width > extentSize.width); | ||
| 915 | if (newHSBbNeeded != hsbNeeded) { | ||
| 916 | hsbNeeded = newHSBbNeeded; | ||
| 917 | adjustForHSB(hsbNeeded, availR, hsbR, vpbInsets); | ||
| 918 | if ((vsb != null) && !vsbNeeded && | ||
| 919 | (vsbPolicy != VERTICAL_SCROLLBAR_NEVER)) { | ||
| 920 | |||
| 921 | extentSize = viewport.toViewCoordinates | ||
| 922 | (availR.getSize()); | ||
| 923 | vsbNeeded = viewPrefSize.height > | ||
| 924 | extentSize.height; | ||
| 925 | |||
| 926 | if (vsbNeeded) { | ||
| 927 | adjustForVSB(true, availR, vsbR, vpbInsets, | ||
| 928 | leftToRight); | ||
| 929 | } | ||
| 930 | } | ||
| 931 | } | ||
| 932 | } | ||
| 933 | if (oldHSBNeeded != hsbNeeded || | ||
| 934 | oldVSBNeeded != vsbNeeded) { | ||
| 935 | viewport.setBounds(availR); | ||
| 936 | // You could argue that we should recheck the | ||
| 937 | // Scrollable methods again until they stop changing, | ||
| 938 | // but they might never stop changing, so we stop here | ||
| 939 | // and don't do any additional checks. | ||
| 940 | } | ||
| 941 | } | ||
| 942 | } | ||
| 943 | |||
| 944 | /* We now have the final size of the viewport: availR. | ||
| 945 | * Now fixup the header and scrollbar widths/heights. | ||
| 946 | */ | ||
| 947 | vsbR.height = availR.height + vpbInsets.top + vpbInsets.bottom; | ||
| 948 | hsbR.width = availR.width + vpbInsets.left + vpbInsets.right; | ||
| 949 | rowHeadR.height = availR.height + vpbInsets.top + vpbInsets.bottom; | ||
| 950 | rowHeadR.y = availR.y - vpbInsets.top; | ||
| 951 | colHeadR.width = availR.width + vpbInsets.left + vpbInsets.right; | ||
| 952 | colHeadR.x = availR.x - vpbInsets.left; | ||
| 953 | |||
| 954 | /* Set the bounds of the remaining components. The scrollbars | ||
| 955 | * are made invisible if they're not needed. | ||
| 956 | */ | ||
| 957 | |||
| 958 | if (rowHead != null) { | ||
| 959 | rowHead.setBounds(rowHeadR); | ||
| 960 | } | ||
| 961 | |||
| 962 | if (colHead != null) { | ||
| 963 | colHead.setBounds(colHeadR); | ||
| 964 | } | ||
| 965 | |||
| 966 | if (vsb != null) { | ||
| 967 | if (vsbNeeded) { | ||
| 968 | if (colHead != null && | ||
| 969 | UIManager.getBoolean("ScrollPane.fillUpperCorner")) | ||
| 970 | { | ||
| 971 | if ((leftToRight && upperRight == null) || | ||
| 972 | (!leftToRight && upperLeft == null)) | ||
| 973 | { | ||
| 974 | // This is used primarily for GTK L&F, which needs to | ||
| 975 | // extend the vertical scrollbar to fill the upper | ||
| 976 | // corner near the column header. Note that we skip | ||
| 977 | // this step (and use the default behavior) if the | ||
| 978 | // user has set a custom corner component. | ||
| 979 | vsbR.y = colHeadR.y; | ||
| 980 | vsbR.height += colHeadR.height; | ||
| 981 | } | ||
| 982 | } | ||
| 983 | vsb.setVisible(true); | ||
| 984 | vsb.setBounds(vsbR); | ||
| 985 | } | ||
| 986 | else { | ||
| 987 | vsb.setVisible(false); | ||
| 988 | } | ||
| 989 | } | ||
| 990 | |||
| 991 | if (hsb != null) { | ||
| 992 | if (hsbNeeded) { | ||
| 993 | if (rowHead != null && | ||
| 994 | UIManager.getBoolean("ScrollPane.fillLowerCorner")) | ||
| 995 | { | ||
| 996 | if ((leftToRight && lowerLeft == null) || | ||
| 997 | (!leftToRight && lowerRight == null)) | ||
| 998 | { | ||
| 999 | // This is used primarily for GTK L&F, which needs to | ||
| 1000 | // extend the horizontal scrollbar to fill the lower | ||
| 1001 | // corner near the row header. Note that we skip | ||
| 1002 | // this step (and use the default behavior) if the | ||
| 1003 | // user has set a custom corner component. | ||
| 1004 | if (leftToRight) { | ||
| 1005 | hsbR.x = rowHeadR.x; | ||
| 1006 | } | ||
| 1007 | hsbR.width += rowHeadR.width; | ||
| 1008 | } | ||
| 1009 | } | ||
| 1010 | hsb.setVisible(true); | ||
| 1011 | hsb.setBounds(hsbR); | ||
| 1012 | } | ||
| 1013 | else { | ||
| 1014 | hsb.setVisible(false); | ||
| 1015 | } | ||
| 1016 | } | ||
| 1017 | |||
| 1018 | if (lowerLeft != null) { | ||
| 1019 | lowerLeft.setBounds(leftToRight ? rowHeadR.x : vsbR.x, | ||
| 1020 | hsbR.y, | ||
| 1021 | leftToRight ? rowHeadR.width : vsbR.width, | ||
| 1022 | hsbR.height); | ||
| 1023 | } | ||
| 1024 | |||
| 1025 | if (lowerRight != null) { | ||
| 1026 | lowerRight.setBounds(leftToRight ? vsbR.x : rowHeadR.x, | ||
| 1027 | hsbR.y, | ||
| 1028 | leftToRight ? vsbR.width : rowHeadR.width, | ||
| 1029 | hsbR.height); | ||
| 1030 | } | ||
| 1031 | |||
| 1032 | if (upperLeft != null) { | ||
| 1033 | upperLeft.setBounds(leftToRight ? rowHeadR.x : vsbR.x, | ||
| 1034 | colHeadR.y, | ||
| 1035 | leftToRight ? rowHeadR.width : vsbR.width, | ||
| 1036 | colHeadR.height); | ||
| 1037 | } | ||
| 1038 | |||
| 1039 | if (upperRight != null) { | ||
| 1040 | upperRight.setBounds(leftToRight ? vsbR.x : rowHeadR.x, | ||
| 1041 | colHeadR.y, | ||
| 1042 | leftToRight ? vsbR.width : rowHeadR.width, | ||
| 1043 | colHeadR.height); | ||
| 1044 | } | ||
| 1045 | } | ||
| 1046 | |||
| 1047 | /** | ||
| 1048 | * Adjusts the <code>Rectangle</code> <code>available</code> based on if | ||
| 1049 | * the vertical scrollbar is needed (<code>wantsVSB</code>). | ||
| 1050 | * The location of the vsb is updated in <code>vsbR</code>, and | ||
| 1051 | * the viewport border insets (<code>vpbInsets</code>) are used to offset | ||
| 1052 | * the vsb. This is only called when <code>wantsVSB</code> has | ||
| 1053 | * changed, eg you shouldn't invoke adjustForVSB(true) twice. | ||
| 1054 | */ | ||
| 1055 | private void adjustForVSB(boolean wantsVSB, Rectangle available, | ||
| 1056 | Rectangle vsbR, Insets vpbInsets, | ||
| 1057 | boolean leftToRight) { | ||
| 1058 | int oldWidth = vsbR.width; | ||
| 1059 | if (wantsVSB) { | ||
| 1060 | int vsbWidth = Math.max(0, Math.min(vsb.getPreferredSize().width, | ||
| 1061 | available.width)); | ||
| 1062 | |||
| 1063 | available.width -= vsbWidth; | ||
| 1064 | vsbR.width = vsbWidth; | ||
| 1065 | |||
| 1066 | if( leftToRight ) { | ||
| 1067 | vsbR.x = available.x + available.width + vpbInsets.right; | ||
| 1068 | } else { | ||
| 1069 | vsbR.x = available.x - vpbInsets.left; | ||
| 1070 | available.x += vsbWidth; | ||
| 1071 | } | ||
| 1072 | } | ||
| 1073 | else { | ||
| 1074 | available.width += oldWidth; | ||
| 1075 | } | ||
| 1076 | } | ||
| 1077 | |||
| 1078 | /** | ||
| 1079 | * Adjusts the <code>Rectangle</code> <code>available</code> based on if | ||
| 1080 | * the horizontal scrollbar is needed (<code>wantsHSB</code>). | ||
| 1081 | * The location of the hsb is updated in <code>hsbR</code>, and | ||
| 1082 | * the viewport border insets (<code>vpbInsets</code>) are used to offset | ||
| 1083 | * the hsb. This is only called when <code>wantsHSB</code> has | ||
| 1084 | * changed, eg you shouldn't invoked adjustForHSB(true) twice. | ||
| 1085 | */ | ||
| 1086 | private void adjustForHSB(boolean wantsHSB, Rectangle available, | ||
| 1087 | Rectangle hsbR, Insets vpbInsets) { | ||
| 1088 | int oldHeight = hsbR.height; | ||
| 1089 | if (wantsHSB) { | ||
| 1090 | int hsbHeight = Math.max(0, Math.min(available.height, | ||
| 1091 | hsb.getPreferredSize().height)); | ||
| 1092 | |||
| 1093 | available.height -= hsbHeight; | ||
| 1094 | hsbR.y = available.y + available.height + vpbInsets.bottom; | ||
| 1095 | hsbR.height = hsbHeight; | ||
| 1096 | } | ||
| 1097 | else { | ||
| 1098 | available.height += oldHeight; | ||
| 1099 | } | ||
| 1100 | } | ||
| 1101 | |||
| 1102 | |||
| 1103 | |||
| 1104 | /** | ||
| 1105 | * Returns the bounds of the border around the specified scroll pane's | ||
| 1106 | * viewport. | ||
| 1107 | * | ||
| 1108 | * @return the size and position of the viewport border | ||
| 1109 | * @deprecated As of JDK version Swing1.1 | ||
| 1110 | * replaced by <code>JScrollPane.getViewportBorderBounds()</code>. | ||
| 1111 | */ | ||
| 1112 | @Deprecated | ||
| 1113 | public Rectangle getViewportBorderBounds(JScrollPane scrollpane) { | ||
| 1114 | return scrollpane.getViewportBorderBounds(); | ||
| 1115 | } | ||
| 1116 | |||
| 1117 | /** | ||
| 1118 | * The UI resource version of <code>ScrollPaneLayout</code>. | ||
| 1119 | */ | ||
| 1120 | public static class UIResource extends ScrollPaneLayout implements javax.swing.plaf.UIResource {} | ||
| 1121 | } | ||