Showing the changes to java/pkg/java/awt/CardLayout.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,612 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 1995, 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 | |||
| 26 | package java.awt; | ||
| 27 | |||
| 28 | import java.util.Hashtable; | ||
| 29 | import java.util.Vector; | ||
| 30 | import java.util.Enumeration; | ||
| 31 | |||
| 32 | import java.io.Serializable; | ||
| 33 | import java.io.ObjectInputStream; | ||
| 34 | import java.io.ObjectOutputStream; | ||
| 35 | import java.io.ObjectStreamField; | ||
| 36 | import java.io.IOException; | ||
| 37 | |||
| 38 | /** | ||
| 39 | * A <code>CardLayout</code> object is a layout manager for a | ||
| 40 | * container. It treats each component in the container as a card. | ||
| 41 | * Only one card is visible at a time, and the container acts as | ||
| 42 | * a stack of cards. The first component added to a | ||
| 43 | * <code>CardLayout</code> object is the visible component when the | ||
| 44 | * container is first displayed. | ||
| 45 | * <p> | ||
| 46 | * The ordering of cards is determined by the container's own internal | ||
| 47 | * ordering of its component objects. <code>CardLayout</code> | ||
| 48 | * defines a set of methods that allow an application to flip | ||
| 49 | * through these cards sequentially, or to show a specified card. | ||
| 50 | * The {@link CardLayout#addLayoutComponent} | ||
| 51 | * method can be used to associate a string identifier with a given card | ||
| 52 | * for fast random access. | ||
| 53 | * | ||
| 54 | * @author Arthur van Hoff | ||
| 55 | * @see java.awt.Container | ||
| 56 | * @since JDK1.0 | ||
| 57 | */ | ||
| 58 | |||
| 59 | public class CardLayout implements LayoutManager2, | ||
| 60 | Serializable { | ||
| 61 | |||
| 62 | private static final long serialVersionUID = -4328196481005934313L; | ||
| 63 | |||
| 64 | /* | ||
| 65 | * This creates a Vector to store associated | ||
| 66 | * pairs of components and their names. | ||
| 67 | * @see java.util.Vector | ||
| 68 | */ | ||
| 69 | Vector vector = new Vector(); | ||
| 70 | |||
| 71 | /* | ||
| 72 | * A pair of Component and String that represents its name. | ||
| 73 | */ | ||
| 74 | class Card implements Serializable { | ||
| 75 | static final long serialVersionUID = 6640330810709497518L; | ||
| 76 | public String name; | ||
| 77 | public Component comp; | ||
| 78 | public Card(String cardName, Component cardComponent) { | ||
| 79 | name = cardName; | ||
| 80 | comp = cardComponent; | ||
| 81 | } | ||
| 82 | } | ||
| 83 | |||
| 84 | /* | ||
| 85 | * Index of Component currently displayed by CardLayout. | ||
| 86 | */ | ||
| 87 | int currentCard = 0; | ||
| 88 | |||
| 89 | |||
| 90 | /* | ||
| 91 | * A cards horizontal Layout gap (inset). It specifies | ||
| 92 | * the space between the left and right edges of a | ||
| 93 | * container and the current component. | ||
| 94 | * This should be a non negative Integer. | ||
| 95 | * @see getHgap() | ||
| 96 | * @see setHgap() | ||
| 97 | */ | ||
| 98 | int hgap; | ||
| 99 | |||
| 100 | /* | ||
| 101 | * A cards vertical Layout gap (inset). It specifies | ||
| 102 | * the space between the top and bottom edges of a | ||
| 103 | * container and the current component. | ||
| 104 | * This should be a non negative Integer. | ||
| 105 | * @see getVgap() | ||
| 106 | * @see setVgap() | ||
| 107 | */ | ||
| 108 | int vgap; | ||
| 109 | |||
| 110 | /** | ||
| 111 | * @serialField tab Hashtable | ||
| 112 | * deprectated, for forward compatibility only | ||
| 113 | * @serialField hgap int | ||
| 114 | * @serialField vgap int | ||
| 115 | * @serialField vector Vector | ||
| 116 | * @serialField currentCard int | ||
| 117 | */ | ||
| 118 | private static final ObjectStreamField[] serialPersistentFields = { | ||
| 119 | new ObjectStreamField("tab", Hashtable.class), | ||
| 120 | new ObjectStreamField("hgap", Integer.TYPE), | ||
| 121 | new ObjectStreamField("vgap", Integer.TYPE), | ||
| 122 | new ObjectStreamField("vector", Vector.class), | ||
| 123 | new ObjectStreamField("currentCard", Integer.TYPE) | ||
| 124 | }; | ||
| 125 | |||
| 126 | /** | ||
| 127 | * Creates a new card layout with gaps of size zero. | ||
| 128 | */ | ||
| 129 | public CardLayout() { | ||
| 130 | this(0, 0); | ||
| 131 | } | ||
| 132 | |||
| 133 | /** | ||
| 134 | * Creates a new card layout with the specified horizontal and | ||
| 135 | * vertical gaps. The horizontal gaps are placed at the left and | ||
| 136 | * right edges. The vertical gaps are placed at the top and bottom | ||
| 137 | * edges. | ||
| 138 | * @param hgap the horizontal gap. | ||
| 139 | * @param vgap the vertical gap. | ||
| 140 | */ | ||
| 141 | public CardLayout(int hgap, int vgap) { | ||
| 142 | this.hgap = hgap; | ||
| 143 | this.vgap = vgap; | ||
| 144 | } | ||
| 145 | |||
| 146 | /** | ||
| 147 | * Gets the horizontal gap between components. | ||
| 148 | * @return the horizontal gap between components. | ||
| 149 | * @see java.awt.CardLayout#setHgap(int) | ||
| 150 | * @see java.awt.CardLayout#getVgap() | ||
| 151 | * @since JDK1.1 | ||
| 152 | */ | ||
| 153 | public int getHgap() { | ||
| 154 | return hgap; | ||
| 155 | } | ||
| 156 | |||
| 157 | /** | ||
| 158 | * Sets the horizontal gap between components. | ||
| 159 | * @param hgap the horizontal gap between components. | ||
| 160 | * @see java.awt.CardLayout#getHgap() | ||
| 161 | * @see java.awt.CardLayout#setVgap(int) | ||
| 162 | * @since JDK1.1 | ||
| 163 | */ | ||
| 164 | public void setHgap(int hgap) { | ||
| 165 | this.hgap = hgap; | ||
| 166 | } | ||
| 167 | |||
| 168 | /** | ||
| 169 | * Gets the vertical gap between components. | ||
| 170 | * @return the vertical gap between components. | ||
| 171 | * @see java.awt.CardLayout#setVgap(int) | ||
| 172 | * @see java.awt.CardLayout#getHgap() | ||
| 173 | */ | ||
| 174 | public int getVgap() { | ||
| 175 | return vgap; | ||
| 176 | } | ||
| 177 | |||
| 178 | /** | ||
| 179 | * Sets the vertical gap between components. | ||
| 180 | * @param vgap the vertical gap between components. | ||
| 181 | * @see java.awt.CardLayout#getVgap() | ||
| 182 | * @see java.awt.CardLayout#setHgap(int) | ||
| 183 | * @since JDK1.1 | ||
| 184 | */ | ||
| 185 | public void setVgap(int vgap) { | ||
| 186 | this.vgap = vgap; | ||
| 187 | } | ||
| 188 | |||
| 189 | /** | ||
| 190 | * Adds the specified component to this card layout's internal | ||
| 191 | * table of names. The object specified by <code>constraints</code> | ||
| 192 | * must be a string. The card layout stores this string as a key-value | ||
| 193 | * pair that can be used for random access to a particular card. | ||
| 194 | * By calling the <code>show</code> method, an application can | ||
| 195 | * display the component with the specified name. | ||
| 196 | * @param comp the component to be added. | ||
| 197 | * @param constraints a tag that identifies a particular | ||
| 198 | * card in the layout. | ||
| 199 | * @see java.awt.CardLayout#show(java.awt.Container, java.lang.String) | ||
| 200 | * @exception IllegalArgumentException if the constraint is not a string. | ||
| 201 | */ | ||
| 202 | public void addLayoutComponent(Component comp, Object constraints) { | ||
| 203 | synchronized (comp.getTreeLock()) { | ||
| 204 | if (constraints == null){ | ||
| 205 | constraints = ""; | ||
| 206 | } | ||
| 207 | if (constraints instanceof String) { | ||
| 208 | addLayoutComponent((String)constraints, comp); | ||
| 209 | } else { | ||
| 210 | throw new IllegalArgumentException("cannot add to layout: constraint must be a string"); | ||
| 211 | } | ||
| 212 | } | ||
| 213 | } | ||
| 214 | |||
| 215 | /** | ||
| 216 | * @deprecated replaced by | ||
| 217 | * <code>addLayoutComponent(Component, Object)</code>. | ||
| 218 | */ | ||
| 219 | @Deprecated | ||
| 220 | public void addLayoutComponent(String name, Component comp) { | ||
| 221 | synchronized (comp.getTreeLock()) { | ||
| 222 | if (!vector.isEmpty()) { | ||
| 223 | comp.setVisible(false); | ||
| 224 | } | ||
| 225 | for (int i=0; i < vector.size(); i++) { | ||
| 226 | if (((Card)vector.get(i)).name.equals(name)) { | ||
| 227 | ((Card)vector.get(i)).comp = comp; | ||
| 228 | return; | ||
| 229 | } | ||
| 230 | } | ||
| 231 | vector.add(new Card(name, comp)); | ||
| 232 | } | ||
| 233 | } | ||
| 234 | |||
| 235 | /** | ||
| 236 | * Removes the specified component from the layout. | ||
| 237 | * If the card was visible on top, the next card underneath it is shown. | ||
| 238 | * @param comp the component to be removed. | ||
| 239 | * @see java.awt.Container#remove(java.awt.Component) | ||
| 240 | * @see java.awt.Container#removeAll() | ||
| 241 | */ | ||
| 242 | public void removeLayoutComponent(Component comp) { | ||
| 243 | synchronized (comp.getTreeLock()) { | ||
| 244 | for (int i = 0; i < vector.size(); i++) { | ||
| 245 | if (((Card)vector.get(i)).comp == comp) { | ||
| 246 | // if we remove current component we should show next one | ||
| 247 | if (comp.isVisible() && (comp.getParent() != null)) { | ||
| 248 | next(comp.getParent()); | ||
| 249 | } | ||
| 250 | |||
| 251 | vector.remove(i); | ||
| 252 | |||
| 253 | // correct currentCard if this is necessary | ||
| 254 | if (currentCard > i) { | ||
| 255 | currentCard--; | ||
| 256 | } | ||
| 257 | break; | ||
| 258 | } | ||
| 259 | } | ||
| 260 | } | ||
| 261 | } | ||
| 262 | |||
| 263 | /** | ||
| 264 | * Determines the preferred size of the container argument using | ||
| 265 | * this card layout. | ||
| 266 | * @param parent the parent container in which to do the layout | ||
| 267 | * @return the preferred dimensions to lay out the subcomponents | ||
| 268 | * of the specified container | ||
| 269 | * @see java.awt.Container#getPreferredSize | ||
| 270 | * @see java.awt.CardLayout#minimumLayoutSize | ||
| 271 | */ | ||
| 272 | public Dimension preferredLayoutSize(Container parent) { | ||
| 273 | synchronized (parent.getTreeLock()) { | ||
| 274 | Insets insets = parent.getInsets(); | ||
| 275 | int ncomponents = parent.getComponentCount(); | ||
| 276 | int w = 0; | ||
| 277 | int h = 0; | ||
| 278 | |||
| 279 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 280 | Component comp = parent.getComponent(i); | ||
| 281 | Dimension d = comp.getPreferredSize(); | ||
| 282 | if (d.width > w) { | ||
| 283 | w = d.width; | ||
| 284 | } | ||
| 285 | if (d.height > h) { | ||
| 286 | h = d.height; | ||
| 287 | } | ||
| 288 | } | ||
| 289 | return new Dimension(insets.left + insets.right + w + hgap*2, | ||
| 290 | insets.top + insets.bottom + h + vgap*2); | ||
| 291 | } | ||
| 292 | } | ||
| 293 | |||
| 294 | /** | ||
| 295 | * Calculates the minimum size for the specified panel. | ||
| 296 | * @param parent the parent container in which to do the layout | ||
| 297 | * @return the minimum dimensions required to lay out the | ||
| 298 | * subcomponents of the specified container | ||
| 299 | * @see java.awt.Container#doLayout | ||
| 300 | * @see java.awt.CardLayout#preferredLayoutSize | ||
| 301 | */ | ||
| 302 | public Dimension minimumLayoutSize(Container parent) { | ||
| 303 | synchronized (parent.getTreeLock()) { | ||
| 304 | Insets insets = parent.getInsets(); | ||
| 305 | int ncomponents = parent.getComponentCount(); | ||
| 306 | int w = 0; | ||
| 307 | int h = 0; | ||
| 308 | |||
| 309 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 310 | Component comp = parent.getComponent(i); | ||
| 311 | Dimension d = comp.getMinimumSize(); | ||
| 312 | if (d.width > w) { | ||
| 313 | w = d.width; | ||
| 314 | } | ||
| 315 | if (d.height > h) { | ||
| 316 | h = d.height; | ||
| 317 | } | ||
| 318 | } | ||
| 319 | return new Dimension(insets.left + insets.right + w + hgap*2, | ||
| 320 | insets.top + insets.bottom + h + vgap*2); | ||
| 321 | } | ||
| 322 | } | ||
| 323 | |||
| 324 | /** | ||
| 325 | * Returns the maximum dimensions for this layout given the components | ||
| 326 | * in the specified target container. | ||
| 327 | * @param target the component which needs to be laid out | ||
| 328 | * @see Container | ||
| 329 | * @see #minimumLayoutSize | ||
| 330 | * @see #preferredLayoutSize | ||
| 331 | */ | ||
| 332 | public Dimension maximumLayoutSize(Container target) { | ||
| 333 | return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); | ||
| 334 | } | ||
| 335 | |||
| 336 | /** | ||
| 337 | * Returns the alignment along the x axis. This specifies how | ||
| 338 | * the component would like to be aligned relative to other | ||
| 339 | * components. The value should be a number between 0 and 1 | ||
| 340 | * where 0 represents alignment along the origin, 1 is aligned | ||
| 341 | * the furthest away from the origin, 0.5 is centered, etc. | ||
| 342 | */ | ||
| 343 | public float getLayoutAlignmentX(Container parent) { | ||
| 344 | return 0.5f; | ||
| 345 | } | ||
| 346 | |||
| 347 | /** | ||
| 348 | * Returns the alignment along the y axis. This specifies how | ||
| 349 | * the component would like to be aligned relative to other | ||
| 350 | * components. The value should be a number between 0 and 1 | ||
| 351 | * where 0 represents alignment along the origin, 1 is aligned | ||
| 352 | * the furthest away from the origin, 0.5 is centered, etc. | ||
| 353 | */ | ||
| 354 | public float getLayoutAlignmentY(Container parent) { | ||
| 355 | return 0.5f; | ||
| 356 | } | ||
| 357 | |||
| 358 | /** | ||
| 359 | * Invalidates the layout, indicating that if the layout manager | ||
| 360 | * has cached information it should be discarded. | ||
| 361 | */ | ||
| 362 | public void invalidateLayout(Container target) { | ||
| 363 | } | ||
| 364 | |||
| 365 | /** | ||
| 366 | * Lays out the specified container using this card layout. | ||
| 367 | * <p> | ||
| 368 | * Each component in the <code>parent</code> container is reshaped | ||
| 369 | * to be the size of the container, minus space for surrounding | ||
| 370 | * insets, horizontal gaps, and vertical gaps. | ||
| 371 | * | ||
| 372 | * @param parent the parent container in which to do the layout | ||
| 373 | * @see java.awt.Container#doLayout | ||
| 374 | */ | ||
| 375 | public void layoutContainer(Container parent) { | ||
| 376 | synchronized (parent.getTreeLock()) { | ||
| 377 | Insets insets = parent.getInsets(); | ||
| 378 | int ncomponents = parent.getComponentCount(); | ||
| 379 | Component comp = null; | ||
| 380 | boolean currentFound = false; | ||
| 381 | |||
| 382 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 383 | comp = parent.getComponent(i); | ||
| 384 | comp.setBounds(hgap + insets.left, vgap + insets.top, | ||
| 385 | parent.width - (hgap*2 + insets.left + insets.right), | ||
| 386 | parent.height - (vgap*2 + insets.top + insets.bottom)); | ||
| 387 | if (comp.isVisible()) { | ||
| 388 | currentFound = true; | ||
| 389 | } | ||
| 390 | } | ||
| 391 | |||
| 392 | if (!currentFound && ncomponents > 0) { | ||
| 393 | parent.getComponent(0).setVisible(true); | ||
| 394 | } | ||
| 395 | } | ||
| 396 | } | ||
| 397 | |||
| 398 | /** | ||
| 399 | * Make sure that the Container really has a CardLayout installed. | ||
| 400 | * Otherwise havoc can ensue! | ||
| 401 | */ | ||
| 402 | void checkLayout(Container parent) { | ||
| 403 | if (parent.getLayout() != this) { | ||
| 404 | throw new IllegalArgumentException("wrong parent for CardLayout"); | ||
| 405 | } | ||
| 406 | } | ||
| 407 | |||
| 408 | /** | ||
| 409 | * Flips to the first card of the container. | ||
| 410 | * @param parent the parent container in which to do the layout | ||
| 411 | * @see java.awt.CardLayout#last | ||
| 412 | */ | ||
| 413 | public void first(Container parent) { | ||
| 414 | synchronized (parent.getTreeLock()) { | ||
| 415 | checkLayout(parent); | ||
| 416 | int ncomponents = parent.getComponentCount(); | ||
| 417 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 418 | Component comp = parent.getComponent(i); | ||
| 419 | if (comp.isVisible()) { | ||
| 420 | comp.setVisible(false); | ||
| 421 | break; | ||
| 422 | } | ||
| 423 | } | ||
| 424 | if (ncomponents > 0) { | ||
| 425 | currentCard = 0; | ||
| 426 | parent.getComponent(0).setVisible(true); | ||
| 427 | parent.validate(); | ||
| 428 | } | ||
| 429 | } | ||
| 430 | } | ||
| 431 | |||
| 432 | /** | ||
| 433 | * Flips to the next card of the specified container. If the | ||
| 434 | * currently visible card is the last one, this method flips to the | ||
| 435 | * first card in the layout. | ||
| 436 | * @param parent the parent container in which to do the layout | ||
| 437 | * @see java.awt.CardLayout#previous | ||
| 438 | */ | ||
| 439 | public void next(Container parent) { | ||
| 440 | synchronized (parent.getTreeLock()) { | ||
| 441 | checkLayout(parent); | ||
| 442 | int ncomponents = parent.getComponentCount(); | ||
| 443 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 444 | Component comp = parent.getComponent(i); | ||
| 445 | if (comp.isVisible()) { | ||
| 446 | comp.setVisible(false); | ||
| 447 | currentCard = (i + 1) % ncomponents; | ||
| 448 | comp = parent.getComponent(currentCard); | ||
| 449 | comp.setVisible(true); | ||
| 450 | parent.validate(); | ||
| 451 | return; | ||
| 452 | } | ||
| 453 | } | ||
| 454 | showDefaultComponent(parent); | ||
| 455 | } | ||
| 456 | } | ||
| 457 | |||
| 458 | /** | ||
| 459 | * Flips to the previous card of the specified container. If the | ||
| 460 | * currently visible card is the first one, this method flips to the | ||
| 461 | * last card in the layout. | ||
| 462 | * @param parent the parent container in which to do the layout | ||
| 463 | * @see java.awt.CardLayout#next | ||
| 464 | */ | ||
| 465 | public void previous(Container parent) { | ||
| 466 | synchronized (parent.getTreeLock()) { | ||
| 467 | checkLayout(parent); | ||
| 468 | int ncomponents = parent.getComponentCount(); | ||
| 469 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 470 | Component comp = parent.getComponent(i); | ||
| 471 | if (comp.isVisible()) { | ||
| 472 | comp.setVisible(false); | ||
| 473 | currentCard = ((i > 0) ? i-1 : ncomponents-1); | ||
| 474 | comp = parent.getComponent(currentCard); | ||
| 475 | comp.setVisible(true); | ||
| 476 | parent.validate(); | ||
| 477 | return; | ||
| 478 | } | ||
| 479 | } | ||
| 480 | showDefaultComponent(parent); | ||
| 481 | } | ||
| 482 | } | ||
| 483 | |||
| 484 | void showDefaultComponent(Container parent) { | ||
| 485 | if (parent.getComponentCount() > 0) { | ||
| 486 | currentCard = 0; | ||
| 487 | parent.getComponent(0).setVisible(true); | ||
| 488 | parent.validate(); | ||
| 489 | } | ||
| 490 | } | ||
| 491 | |||
| 492 | /** | ||
| 493 | * Flips to the last card of the container. | ||
| 494 | * @param parent the parent container in which to do the layout | ||
| 495 | * @see java.awt.CardLayout#first | ||
| 496 | */ | ||
| 497 | public void last(Container parent) { | ||
| 498 | synchronized (parent.getTreeLock()) { | ||
| 499 | checkLayout(parent); | ||
| 500 | int ncomponents = parent.getComponentCount(); | ||
| 501 | for (int i = 0 ; i < ncomponents ; i++) { | ||
| 502 | Component comp = parent.getComponent(i); | ||
| 503 | if (comp.isVisible()) { | ||
| 504 | comp.setVisible(false); | ||
| 505 | break; | ||
| 506 | } | ||
| 507 | } | ||
| 508 | if (ncomponents > 0) { | ||
| 509 | currentCard = ncomponents - 1; | ||
| 510 | parent.getComponent(currentCard).setVisible(true); | ||
| 511 | parent.validate(); | ||
| 512 | } | ||
| 513 | } | ||
| 514 | } | ||
| 515 | |||
| 516 | /** | ||
| 517 | * Flips to the component that was added to this layout with the | ||
| 518 | * specified <code>name</code>, using <code>addLayoutComponent</code>. | ||
| 519 | * If no such component exists, then nothing happens. | ||
| 520 | * @param parent the parent container in which to do the layout | ||
| 521 | * @param name the component name | ||
| 522 | * @see java.awt.CardLayout#addLayoutComponent(java.awt.Component, java.lang.Object) | ||
| 523 | */ | ||
| 524 | public void show(Container parent, String name) { | ||
| 525 | synchronized (parent.getTreeLock()) { | ||
| 526 | checkLayout(parent); | ||
| 527 | Component next = null; | ||
| 528 | int ncomponents = vector.size(); | ||
| 529 | for (int i = 0; i < ncomponents; i++) { | ||
| 530 | Card card = (Card)vector.get(i); | ||
| 531 | if (card.name.equals(name)) { | ||
| 532 | next = card.comp; | ||
| 533 | currentCard = i; | ||
| 534 | break; | ||
| 535 | } | ||
| 536 | } | ||
| 537 | if ((next != null) && !next.isVisible()) { | ||
| 538 | ncomponents = parent.getComponentCount(); | ||
| 539 | for (int i = 0; i < ncomponents; i++) { | ||
| 540 | Component comp = parent.getComponent(i); | ||
| 541 | if (comp.isVisible()) { | ||
| 542 | comp.setVisible(false); | ||
| 543 | break; | ||
| 544 | } | ||
| 545 | } | ||
| 546 | next.setVisible(true); | ||
| 547 | parent.validate(); | ||
| 548 | } | ||
| 549 | } | ||
| 550 | } | ||
| 551 | |||
| 552 | /** | ||
| 553 | * Returns a string representation of the state of this card layout. | ||
| 554 | * @return a string representation of this card layout. | ||
| 555 | */ | ||
| 556 | public String toString() { | ||
| 557 | return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap + "]"; | ||
| 558 | } | ||
| 559 | |||
| 560 | /** | ||
| 561 | * Reads serializable fields from stream. | ||
| 562 | */ | ||
| 563 | private void readObject(ObjectInputStream s) | ||
| 564 | throws ClassNotFoundException, IOException | ||
| 565 | { | ||
| 566 | ObjectInputStream.GetField f = s.readFields(); | ||
| 567 | |||
| 568 | hgap = f.get("hgap", 0); | ||
| 569 | vgap = f.get("vgap", 0); | ||
| 570 | |||
| 571 | if (f.defaulted("vector")) { | ||
| 572 | // pre-1.4 stream | ||
| 573 | Hashtable tab = (Hashtable)f.get("tab", null); | ||
| 574 | vector = new Vector(); | ||
| 575 | if (tab != null && !tab.isEmpty()) { | ||
| 576 | for (Enumeration e = tab.keys() ; e.hasMoreElements() ; ) { | ||
| 577 | String key = (String)e.nextElement(); | ||
| 578 | Component comp = (Component)tab.get(key); | ||
| 579 | vector.add(new Card(key, comp)); | ||
| 580 | if (comp.isVisible()) { | ||
| 581 | currentCard = vector.size() - 1; | ||
| 582 | } | ||
| 583 | } | ||
| 584 | } | ||
| 585 | } else { | ||
| 586 | vector = (Vector)f.get("vector", null); | ||
| 587 | currentCard = f.get("currentCard", 0); | ||
| 588 | } | ||
| 589 | } | ||
| 590 | |||
| 591 | /** | ||
| 592 | * Writes serializable fields to stream. | ||
| 593 | */ | ||
| 594 | private void writeObject(ObjectOutputStream s) | ||
| 595 | throws IOException | ||
| 596 | { | ||
| 597 | Hashtable tab = new Hashtable(); | ||
| 598 | int ncomponents = vector.size(); | ||
| 599 | for (int i = 0; i < ncomponents; i++) { | ||
| 600 | Card card = (Card)vector.get(i); | ||
| 601 | tab.put(card.name, card.comp); | ||
| 602 | } | ||
| 603 | |||
| 604 | ObjectOutputStream.PutField f = s.putFields(); | ||
| 605 | f.put("hgap", hgap); | ||
| 606 | f.put("vgap", vgap); | ||
| 607 | f.put("vector", vector); | ||
| 608 | f.put("currentCard", currentCard); | ||
| 609 | f.put("tab", tab); | ||
| 610 | s.writeFields(); | ||
| 611 | } | ||
| 612 | } | ||