J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1995-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package java.awt; |
| 26 | |
| 27 | import java.util.Hashtable; |
| 28 | import java.util.Arrays; |
| 29 | |
| 30 | /** |
| 31 | * The <code>GridBagLayout</code> class is a flexible layout |
| 32 | * manager that aligns components vertically, horizontally or along their |
| 33 | * baseline without requiring that the components be of the same size. |
| 34 | * Each <code>GridBagLayout</code> object maintains a dynamic, |
| 35 | * rectangular grid of cells, with each component occupying |
| 36 | * one or more cells, called its <em>display area</em>. |
| 37 | * <p> |
| 38 | * Each component managed by a <code>GridBagLayout</code> is associated with |
| 39 | * an instance of {@link GridBagConstraints}. The constraints object |
| 40 | * specifies where a component's display area should be located on the grid |
| 41 | * and how the component should be positioned within its display area. In |
| 42 | * addition to its constraints object, the <code>GridBagLayout</code> also |
| 43 | * considers each component's minimum and preferred sizes in order to |
| 44 | * determine a component's size. |
| 45 | * <p> |
| 46 | * The overall orientation of the grid depends on the container's |
| 47 | * {@link ComponentOrientation} property. For horizontal left-to-right |
| 48 | * orientations, grid coordinate (0,0) is in the upper left corner of the |
| 49 | * container with x increasing to the right and y increasing downward. For |
| 50 | * horizontal right-to-left orientations, grid coordinate (0,0) is in the upper |
| 51 | * right corner of the container with x increasing to the left and y |
| 52 | * increasing downward. |
| 53 | * <p> |
| 54 | * To use a grid bag layout effectively, you must customize one or more |
| 55 | * of the <code>GridBagConstraints</code> objects that are associated |
| 56 | * with its components. You customize a <code>GridBagConstraints</code> |
| 57 | * object by setting one or more of its instance variables: |
| 58 | * <p> |
| 59 | * <dl> |
| 60 | * <dt>{@link GridBagConstraints#gridx}, |
| 61 | * {@link GridBagConstraints#gridy} |
| 62 | * <dd>Specifies the cell containing the leading corner of the component's |
| 63 | * display area, where the cell at the origin of the grid has address |
| 64 | * <code>gridx = 0</code>, |
| 65 | * <code>gridy = 0</code>. For horizontal left-to-right layout, |
| 66 | * a component's leading corner is its upper left. For horizontal |
| 67 | * right-to-left layout, a component's leading corner is its upper right. |
| 68 | * Use <code>GridBagConstraints.RELATIVE</code> (the default value) |
| 69 | * to specify that the component be placed immediately following |
| 70 | * (along the x axis for <code>gridx</code> or the y axis for |
| 71 | * <code>gridy</code>) the component that was added to the container |
| 72 | * just before this component was added. |
| 73 | * <dt>{@link GridBagConstraints#gridwidth}, |
| 74 | * {@link GridBagConstraints#gridheight} |
| 75 | * <dd>Specifies the number of cells in a row (for <code>gridwidth</code>) |
| 76 | * or column (for <code>gridheight</code>) |
| 77 | * in the component's display area. |
| 78 | * The default value is 1. |
| 79 | * Use <code>GridBagConstraints.REMAINDER</code> to specify |
| 80 | * that the component's display area will be from <code>gridx</code> |
| 81 | * to the last cell in the row (for <code>gridwidth</code>) |
| 82 | * or from <code>gridy</code> to the last cell in the column |
| 83 | * (for <code>gridheight</code>). |
| 84 | * |
| 85 | * Use <code>GridBagConstraints.RELATIVE</code> to specify |
| 86 | * that the component's display area will be from <code>gridx</code> |
| 87 | * to the next to the last cell in its row (for <code>gridwidth</code> |
| 88 | * or from <code>gridy</code> to the next to the last cell in its |
| 89 | * column (for <code>gridheight</code>). |
| 90 | * |
| 91 | * <dt>{@link GridBagConstraints#fill} |
| 92 | * <dd>Used when the component's display area |
| 93 | * is larger than the component's requested size |
| 94 | * to determine whether (and how) to resize the component. |
| 95 | * Possible values are |
| 96 | * <code>GridBagConstraints.NONE</code> (the default), |
| 97 | * <code>GridBagConstraints.HORIZONTAL</code> |
| 98 | * (make the component wide enough to fill its display area |
| 99 | * horizontally, but don't change its height), |
| 100 | * <code>GridBagConstraints.VERTICAL</code> |
| 101 | * (make the component tall enough to fill its display area |
| 102 | * vertically, but don't change its width), and |
| 103 | * <code>GridBagConstraints.BOTH</code> |
| 104 | * (make the component fill its display area entirely). |
| 105 | * <dt>{@link GridBagConstraints#ipadx}, |
| 106 | * {@link GridBagConstraints#ipady} |
| 107 | * <dd>Specifies the component's internal padding within the layout, |
| 108 | * how much to add to the minimum size of the component. |
| 109 | * The width of the component will be at least its minimum width |
| 110 | * plus <code>ipadx</code> pixels. Similarly, the height of |
| 111 | * the component will be at least the minimum height plus |
| 112 | * <code>ipady</code> pixels. |
| 113 | * <dt>{@link GridBagConstraints#insets} |
| 114 | * <dd>Specifies the component's external padding, the minimum |
| 115 | * amount of space between the component and the edges of its display area. |
| 116 | * <dt>{@link GridBagConstraints#anchor} |
| 117 | * <dd>Specifies where the component should be positioned in its display area. |
| 118 | * There are three kinds of possible values: absolute, orientation-relative, |
| 119 | * and baseline-relative |
| 120 | * Orientation relative values are interpreted relative to the container's |
| 121 | * <code>ComponentOrientation</code> property while absolute values |
| 122 | * are not. Baseline relative values are calculated relative to the |
| 123 | * baseline. Valid values are:</dd> |
| 124 | * <p> |
| 125 | * <center><table BORDER=0 COLS=3 WIDTH=800 |
| 126 | * SUMMARY="absolute, relative and baseline values as described above"> |
| 127 | * <tr> |
| 128 | * <th><P ALIGN="LEFT">Absolute Values</th> |
| 129 | * <th><P ALIGN="LEFT">Orientation Relative Values</th> |
| 130 | * <th><P ALIGN="LEFT">Baseline Relative Values</th> |
| 131 | * </tr> |
| 132 | * <tr> |
| 133 | * <td> |
| 134 | * <li><code>GridBagConstraints.NORTH</code></li> |
| 135 | * <li><code>GridBagConstraints.SOUTH</code></li> |
| 136 | * <li><code>GridBagConstraints.WEST</code></li> |
| 137 | * <li><code>GridBagConstraints.EAST</code></li> |
| 138 | * <li><code>GridBagConstraints.NORTHWEST</code></li> |
| 139 | * <li><code>GridBagConstraints.NORTHEAST</code></li> |
| 140 | * <li><code>GridBagConstraints.SOUTHWEST</code></li> |
| 141 | * <li><code>GridBagConstraints.SOUTHEAST</code></li> |
| 142 | * <li><code>GridBagConstraints.CENTER</code> (the default)</li> |
| 143 | * </td> |
| 144 | * <td> |
| 145 | * <li><code>GridBagConstraints.PAGE_START</code></li> |
| 146 | * <li><code>GridBagConstraints.PAGE_END</code></li> |
| 147 | * <li><code>GridBagConstraints.LINE_START</code></li> |
| 148 | * <li><code>GridBagConstraints.LINE_END</code></li> |
| 149 | * <li><code>GridBagConstraints.FIRST_LINE_START</code></li> |
| 150 | * <li><code>GridBagConstraints.FIRST_LINE_END</code></li> |
| 151 | * <li><code>GridBagConstraints.LAST_LINE_START</code></li> |
| 152 | * <li><code>GridBagConstraints.LAST_LINE_END</code></li> |
| 153 | * </td> |
| 154 | * <td> |
| 155 | * <li><code>GridBagConstraints.BASELINE</code></li> |
| 156 | * <li><code>GridBagConstraints.BASELINE_LEADING</code></li> |
| 157 | * <li><code>GridBagConstraints.BASELINE_TRAILING</code></li> |
| 158 | * <li><code>GridBagConstraints.ABOVE_BASELINE</code></li> |
| 159 | * <li><code>GridBagConstraints.ABOVE_BASELINE_LEADING</code></li> |
| 160 | * <li><code>GridBagConstraints.ABOVE_BASELINE_TRAILING</code></li> |
| 161 | * <li><code>GridBagConstraints.BELOW_BASELINE</code></li> |
| 162 | * <li><code>GridBagConstraints.BELOW_BASELINE_LEADING</code></li> |
| 163 | * <li><code>GridBagConstraints.BELOW_BASELINE_TRAILING</code></li> |
| 164 | * </td> |
| 165 | * </tr> |
| 166 | * </table></center><p> |
| 167 | * <dt>{@link GridBagConstraints#weightx}, |
| 168 | * {@link GridBagConstraints#weighty} |
| 169 | * <dd>Used to determine how to distribute space, which is |
| 170 | * important for specifying resizing behavior. |
| 171 | * Unless you specify a weight for at least one component |
| 172 | * in a row (<code>weightx</code>) and column (<code>weighty</code>), |
| 173 | * all the components clump together in the center of their container. |
| 174 | * This is because when the weight is zero (the default), |
| 175 | * the <code>GridBagLayout</code> object puts any extra space |
| 176 | * between its grid of cells and the edges of the container. |
| 177 | * </dl> |
| 178 | * <p> |
| 179 | * Each row may have a baseline; the baseline is determined by the |
| 180 | * components in that row that have a valid baseline and are aligned |
| 181 | * along the baseline (the component's anchor value is one of {@code |
| 182 | * BASELINE}, {@code BASELINE_LEADING} or {@code BASELINE_TRAILING}). |
| 183 | * If none of the components in the row has a valid baseline, the row |
| 184 | * does not have a baseline. |
| 185 | * <p> |
| 186 | * If a component spans rows it is aligned either to the baseline of |
| 187 | * the start row (if the baseline-resize behavior is {@code |
| 188 | * CONSTANT_ASCENT}) or the end row (if the baseline-resize behavior |
| 189 | * is {@code CONSTANT_DESCENT}). The row that the component is |
| 190 | * aligned to is called the <em>prevailing row</em>. |
| 191 | * <p> |
| 192 | * The following figure shows a baseline layout and includes a |
| 193 | * component that spans rows: |
| 194 | * <center><table summary="Baseline Layout"> |
| 195 | * <tr ALIGN=CENTER> |
| 196 | * <td> |
| 197 | * <img src="doc-files/GridBagLayout-baseline.png" |
| 198 | * alt="The following text describes this graphic (Figure 1)." ALIGN=center> |
| 199 | * </td> |
| 200 | * </table></center> |
| 201 | * This layout consists of three components: |
| 202 | * <ul><li>A panel that starts in row 0 and ends in row 1. The panel |
| 203 | * has a baseline-resize behavior of <code>CONSTANT_DESCENT</code> and has |
| 204 | * an anchor of <code>BASELINE</code>. As the baseline-resize behavior |
| 205 | * is <code>CONSTANT_DESCENT</code> the prevailing row for the panel is |
| 206 | * row 1. |
| 207 | * <li>Two buttons, each with a baseline-resize behavior of |
| 208 | * <code>CENTER_OFFSET</code> and an anchor of <code>BASELINE</code>. |
| 209 | * </ul> |
| 210 | * Because the second button and the panel share the same prevailing row, |
| 211 | * they are both aligned along their baseline. |
| 212 | * <p> |
| 213 | * Components positioned using one of the baseline-relative values resize |
| 214 | * differently than when positioned using an absolute or orientation-relative |
| 215 | * value. How components change is dictated by how the baseline of the |
| 216 | * prevailing row changes. The baseline is anchored to the |
| 217 | * bottom of the display area if any components with the same prevailing row |
| 218 | * have a baseline-resize behavior of <code>CONSTANT_DESCENT</code>, |
| 219 | * otherwise the baseline is anchored to the top of the display area. |
| 220 | * The following rules dictate the resize behavior: |
| 221 | * <ul> |
| 222 | * <li>Resizable components positioned above the baseline can only |
| 223 | * grow as tall as the baseline. For example, if the baseline is at 100 |
| 224 | * and anchored at the top, a resizable component positioned above the |
| 225 | * baseline can never grow more than 100 units. |
| 226 | * <li>Similarly, resizable components positioned below the baseline can |
| 227 | * only grow as high as the difference between the display height and the |
| 228 | * baseline. |
| 229 | * <li>Resizable components positioned on the baseline with a |
| 230 | * baseline-resize behavior of <code>OTHER</code> are only resized if |
| 231 | * the baseline at the resized size fits within the display area. If |
| 232 | * the baseline is such that it does not fit within the display area |
| 233 | * the component is not resized. |
| 234 | * <li>Components positioned on the baseline that do not have a |
| 235 | * baseline-resize behavior of <code>OTHER</code> |
| 236 | * can only grow as tall as {@code display height - baseline + baseline of component}. |
| 237 | * </ul> |
| 238 | * If you position a component along the baseline, but the |
| 239 | * component does not have a valid baseline, it will be vertically centered |
| 240 | * in its space. Similarly if you have positioned a component relative |
| 241 | * to the baseline and none of the components in the row have a valid |
| 242 | * baseline the component is vertically centered. |
| 243 | * <p> |
| 244 | * The following figures show ten components (all buttons) |
| 245 | * managed by a grid bag layout. Figure 2 shows the layout for a horizontal, |
| 246 | * left-to-right container and Figure 3 shows the layout for a horizontal, |
| 247 | * right-to-left container. |
| 248 | * <p> |
| 249 | * <center><table COLS=2 WIDTH=600 summary="layout"> |
| 250 | * <tr ALIGN=CENTER> |
| 251 | * <td> |
| 252 | * <img src="doc-files/GridBagLayout-1.gif" alt="The preceeding text describes this graphic (Figure 1)." ALIGN=center HSPACE=10 VSPACE=7> |
| 253 | * </td> |
| 254 | * <td> |
| 255 | * <img src="doc-files/GridBagLayout-2.gif" alt="The preceeding text describes this graphic (Figure 2)." ALIGN=center HSPACE=10 VSPACE=7> |
| 256 | * </td> |
| 257 | * <tr ALIGN=CENTER> |
| 258 | * <td>Figure 2: Horizontal, Left-to-Right</td> |
| 259 | * <td>Figure 3: Horizontal, Right-to-Left</td> |
| 260 | * </tr> |
| 261 | * </table></center> |
| 262 | * <p> |
| 263 | * Each of the ten components has the <code>fill</code> field |
| 264 | * of its associated <code>GridBagConstraints</code> object |
| 265 | * set to <code>GridBagConstraints.BOTH</code>. |
| 266 | * In addition, the components have the following non-default constraints: |
| 267 | * <p> |
| 268 | * <ul> |
| 269 | * <li>Button1, Button2, Button3: <code>weightx = 1.0</code> |
| 270 | * <li>Button4: <code>weightx = 1.0</code>, |
| 271 | * <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| 272 | * <li>Button5: <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| 273 | * <li>Button6: <code>gridwidth = GridBagConstraints.RELATIVE</code> |
| 274 | * <li>Button7: <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| 275 | * <li>Button8: <code>gridheight = 2</code>, |
| 276 | * <code>weighty = 1.0</code> |
| 277 | * <li>Button9, Button 10: |
| 278 | * <code>gridwidth = GridBagConstraints.REMAINDER</code> |
| 279 | * </ul> |
| 280 | * <p> |
| 281 | * Here is the code that implements the example shown above: |
| 282 | * <p> |
| 283 | * <hr><blockquote><pre> |
| 284 | * import java.awt.*; |
| 285 | * import java.util.*; |
| 286 | * import java.applet.Applet; |
| 287 | * |
| 288 | * public class GridBagEx1 extends Applet { |
| 289 | * |
| 290 | * protected void makebutton(String name, |
| 291 | * GridBagLayout gridbag, |
| 292 | * GridBagConstraints c) { |
| 293 | * Button button = new Button(name); |
| 294 | * gridbag.setConstraints(button, c); |
| 295 | * add(button); |
| 296 | * } |
| 297 | * |
| 298 | * public void init() { |
| 299 | * GridBagLayout gridbag = new GridBagLayout(); |
| 300 | * GridBagConstraints c = new GridBagConstraints(); |
| 301 | * |
| 302 | * setFont(new Font("SansSerif", Font.PLAIN, 14)); |
| 303 | * setLayout(gridbag); |
| 304 | * |
| 305 | * c.fill = GridBagConstraints.BOTH; |
| 306 | * c.weightx = 1.0; |
| 307 | * makebutton("Button1", gridbag, c); |
| 308 | * makebutton("Button2", gridbag, c); |
| 309 | * makebutton("Button3", gridbag, c); |
| 310 | * |
| 311 | * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| 312 | * makebutton("Button4", gridbag, c); |
| 313 | * |
| 314 | * c.weightx = 0.0; //reset to the default |
| 315 | * makebutton("Button5", gridbag, c); //another row |
| 316 | * |
| 317 | * c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last in row |
| 318 | * makebutton("Button6", gridbag, c); |
| 319 | * |
| 320 | * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| 321 | * makebutton("Button7", gridbag, c); |
| 322 | * |
| 323 | * c.gridwidth = 1; //reset to the default |
| 324 | * c.gridheight = 2; |
| 325 | * c.weighty = 1.0; |
| 326 | * makebutton("Button8", gridbag, c); |
| 327 | * |
| 328 | * c.weighty = 0.0; //reset to the default |
| 329 | * c.gridwidth = GridBagConstraints.REMAINDER; //end row |
| 330 | * c.gridheight = 1; //reset to the default |
| 331 | * makebutton("Button9", gridbag, c); |
| 332 | * makebutton("Button10", gridbag, c); |
| 333 | * |
| 334 | * setSize(300, 100); |
| 335 | * } |
| 336 | * |
| 337 | * public static void main(String args[]) { |
| 338 | * Frame f = new Frame("GridBag Layout Example"); |
| 339 | * GridBagEx1 ex1 = new GridBagEx1(); |
| 340 | * |
| 341 | * ex1.init(); |
| 342 | * |
| 343 | * f.add("Center", ex1); |
| 344 | * f.pack(); |
| 345 | * f.setSize(f.getPreferredSize()); |
| 346 | * f.show(); |
| 347 | * } |
| 348 | * } |
| 349 | * </pre></blockquote><hr> |
| 350 | * <p> |
| 351 | * @author Doug Stein |
| 352 | * @author Bill Spitzak (orignial NeWS & OLIT implementation) |
| 353 | * @see java.awt.GridBagConstraints |
| 354 | * @see java.awt.GridBagLayoutInfo |
| 355 | * @see java.awt.ComponentOrientation |
| 356 | * @since JDK1.0 |
| 357 | */ |
| 358 | public class GridBagLayout implements LayoutManager2, |
| 359 | java.io.Serializable { |
| 360 | |
| 361 | static final int EMPIRICMULTIPLIER = 2; |
| 362 | /** |
| 363 | * This field is no longer used to reserve arrays and keeped for backward |
| 364 | * compatibility. Previously, this was |
| 365 | * the maximum number of grid positions (both horizontal and |
| 366 | * vertical) that could be laid out by the grid bag layout. |
| 367 | * Current implementation doesn't impose any limits |
| 368 | * on the size of a grid. |
| 369 | */ |
| 370 | protected static final int MAXGRIDSIZE = 512; |
| 371 | |
| 372 | /** |
| 373 | * The smallest grid that can be laid out by the grid bag layout. |
| 374 | */ |
| 375 | protected static final int MINSIZE = 1; |
| 376 | /** |
| 377 | * The preferred grid size that can be laid out by the grid bag layout. |
| 378 | */ |
| 379 | protected static final int PREFERREDSIZE = 2; |
| 380 | |
| 381 | /** |
| 382 | * This hashtable maintains the association between |
| 383 | * a component and its gridbag constraints. |
| 384 | * The Keys in <code>comptable</code> are the components and the |
| 385 | * values are the instances of <code>GridBagConstraints</code>. |
| 386 | * |
| 387 | * @serial |
| 388 | * @see java.awt.GridBagConstraints |
| 389 | */ |
| 390 | protected Hashtable<Component,GridBagConstraints> comptable; |
| 391 | |
| 392 | /** |
| 393 | * This field holds a gridbag constraints instance |
| 394 | * containing the default values, so if a component |
| 395 | * does not have gridbag constraints associated with |
| 396 | * it, then the component will be assigned a |
| 397 | * copy of the <code>defaultConstraints</code>. |
| 398 | * |
| 399 | * @serial |
| 400 | * @see #getConstraints(Component) |
| 401 | * @see #setConstraints(Component, GridBagConstraints) |
| 402 | * @see #lookupConstraints(Component) |
| 403 | */ |
| 404 | protected GridBagConstraints defaultConstraints; |
| 405 | |
| 406 | /** |
| 407 | * This field holds the layout information |
| 408 | * for the gridbag. The information in this field |
| 409 | * is based on the most recent validation of the |
| 410 | * gridbag. |
| 411 | * If <code>layoutInfo</code> is <code>null</code> |
| 412 | * this indicates that there are no components in |
| 413 | * the gridbag or if there are components, they have |
| 414 | * not yet been validated. |
| 415 | * |
| 416 | * @serial |
| 417 | * @see #getLayoutInfo(Container, int) |
| 418 | */ |
| 419 | protected GridBagLayoutInfo layoutInfo; |
| 420 | |
| 421 | /** |
| 422 | * This field holds the overrides to the column minimum |
| 423 | * width. If this field is non-<code>null</code> the values are |
| 424 | * applied to the gridbag after all of the minimum columns |
| 425 | * widths have been calculated. |
| 426 | * If columnWidths has more elements than the number of |
| 427 | * columns, columns are added to the gridbag to match |
| 428 | * the number of elements in columnWidth. |
| 429 | * |
| 430 | * @serial |
| 431 | * @see #getLayoutDimensions() |
| 432 | */ |
| 433 | public int columnWidths[]; |
| 434 | |
| 435 | /** |
| 436 | * This field holds the overrides to the row minimum |
| 437 | * heights. If this field is non-<code>null</code> the values are |
| 438 | * applied to the gridbag after all of the minimum row |
| 439 | * heights have been calculated. |
| 440 | * If <code>rowHeights</code> has more elements than the number of |
| 441 | * rows, rowa are added to the gridbag to match |
| 442 | * the number of elements in <code>rowHeights</code>. |
| 443 | * |
| 444 | * @serial |
| 445 | * @see #getLayoutDimensions() |
| 446 | */ |
| 447 | public int rowHeights[]; |
| 448 | |
| 449 | /** |
| 450 | * This field holds the overrides to the column weights. |
| 451 | * If this field is non-<code>null</code> the values are |
| 452 | * applied to the gridbag after all of the columns |
| 453 | * weights have been calculated. |
| 454 | * If <code>columnWeights[i]</code> > weight for column i, then |
| 455 | * column i is assigned the weight in <code>columnWeights[i]</code>. |
| 456 | * If <code>columnWeights</code> has more elements than the number |
| 457 | * of columns, the excess elements are ignored - they do |
| 458 | * not cause more columns to be created. |
| 459 | * |
| 460 | * @serial |
| 461 | */ |
| 462 | public double columnWeights[]; |
| 463 | |
| 464 | /** |
| 465 | * This field holds the overrides to the row weights. |
| 466 | * If this field is non-<code>null</code> the values are |
| 467 | * applied to the gridbag after all of the rows |
| 468 | * weights have been calculated. |
| 469 | * If <code>rowWeights[i]</code> > weight for row i, then |
| 470 | * row i is assigned the weight in <code>rowWeights[i]</code>. |
| 471 | * If <code>rowWeights</code> has more elements than the number |
| 472 | * of rows, the excess elements are ignored - they do |
| 473 | * not cause more rows to be created. |
| 474 | * |
| 475 | * @serial |
| 476 | */ |
| 477 | public double rowWeights[]; |
| 478 | |
| 479 | /** |
| 480 | * The component being positioned. This is set before calling into |
| 481 | * <code>adjustForGravity</code>. |
| 482 | */ |
| 483 | private Component componentAdjusting; |
| 484 | |
| 485 | /** |
| 486 | * Creates a grid bag layout manager. |
| 487 | */ |
| 488 | public GridBagLayout () { |
| 489 | comptable = new Hashtable<Component,GridBagConstraints>(); |
| 490 | defaultConstraints = new GridBagConstraints(); |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * Sets the constraints for the specified component in this layout. |
| 495 | * @param comp the component to be modified |
| 496 | * @param constraints the constraints to be applied |
| 497 | */ |
| 498 | public void setConstraints(Component comp, GridBagConstraints constraints) { |
| 499 | comptable.put(comp, (GridBagConstraints)constraints.clone()); |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * Gets the constraints for the specified component. A copy of |
| 504 | * the actual <code>GridBagConstraints</code> object is returned. |
| 505 | * @param comp the component to be queried |
| 506 | * @return the constraint for the specified component in this |
| 507 | * grid bag layout; a copy of the actual constraint |
| 508 | * object is returned |
| 509 | */ |
| 510 | public GridBagConstraints getConstraints(Component comp) { |
| 511 | GridBagConstraints constraints = comptable.get(comp); |
| 512 | if (constraints == null) { |
| 513 | setConstraints(comp, defaultConstraints); |
| 514 | constraints = comptable.get(comp); |
| 515 | } |
| 516 | return (GridBagConstraints)constraints.clone(); |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * Retrieves the constraints for the specified component. |
| 521 | * The return value is not a copy, but is the actual |
| 522 | * <code>GridBagConstraints</code> object used by the layout mechanism. |
| 523 | * <p> |
| 524 | * If <code>comp</code> is not in the <code>GridBagLayout</code>, |
| 525 | * a set of default <code>GridBagConstraints</code> are returned. |
| 526 | * A <code>comp</code> value of <code>null</code> is invalid |
| 527 | * and returns <code>null</code>. |
| 528 | * |
| 529 | * @param comp the component to be queried |
| 530 | * @return the contraints for the specified component |
| 531 | */ |
| 532 | protected GridBagConstraints lookupConstraints(Component comp) { |
| 533 | GridBagConstraints constraints = comptable.get(comp); |
| 534 | if (constraints == null) { |
| 535 | setConstraints(comp, defaultConstraints); |
| 536 | constraints = comptable.get(comp); |
| 537 | } |
| 538 | return constraints; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * Removes the constraints for the specified component in this layout |
| 543 | * @param comp the component to be modified |
| 544 | */ |
| 545 | private void removeConstraints(Component comp) { |
| 546 | comptable.remove(comp); |
| 547 | } |
| 548 | |
| 549 | /** |
| 550 | * Determines the origin of the layout area, in the graphics coordinate |
| 551 | * space of the target container. This value represents the pixel |
| 552 | * coordinates of the top-left corner of the layout area regardless of |
| 553 | * the <code>ComponentOrientation</code> value of the container. This |
| 554 | * is distinct from the grid origin given by the cell coordinates (0,0). |
| 555 | * Most applications do not call this method directly. |
| 556 | * @return the graphics origin of the cell in the top-left |
| 557 | * corner of the layout grid |
| 558 | * @see java.awt.ComponentOrientation |
| 559 | * @since JDK1.1 |
| 560 | */ |
| 561 | public Point getLayoutOrigin () { |
| 562 | Point origin = new Point(0,0); |
| 563 | if (layoutInfo != null) { |
| 564 | origin.x = layoutInfo.startx; |
| 565 | origin.y = layoutInfo.starty; |
| 566 | } |
| 567 | return origin; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Determines column widths and row heights for the layout grid. |
| 572 | * <p> |
| 573 | * Most applications do not call this method directly. |
| 574 | * @return an array of two arrays, containing the widths |
| 575 | * of the layout columns and |
| 576 | * the heights of the layout rows |
| 577 | * @since JDK1.1 |
| 578 | */ |
| 579 | public int [][] getLayoutDimensions () { |
| 580 | if (layoutInfo == null) |
| 581 | return new int[2][0]; |
| 582 | |
| 583 | int dim[][] = new int [2][]; |
| 584 | dim[0] = new int[layoutInfo.width]; |
| 585 | dim[1] = new int[layoutInfo.height]; |
| 586 | |
| 587 | System.arraycopy(layoutInfo.minWidth, 0, dim[0], 0, layoutInfo.width); |
| 588 | System.arraycopy(layoutInfo.minHeight, 0, dim[1], 0, layoutInfo.height); |
| 589 | |
| 590 | return dim; |
| 591 | } |
| 592 | |
| 593 | /** |
| 594 | * Determines the weights of the layout grid's columns and rows. |
| 595 | * Weights are used to calculate how much a given column or row |
| 596 | * stretches beyond its preferred size, if the layout has extra |
| 597 | * room to fill. |
| 598 | * <p> |
| 599 | * Most applications do not call this method directly. |
| 600 | * @return an array of two arrays, representing the |
| 601 | * horizontal weights of the layout columns |
| 602 | * and the vertical weights of the layout rows |
| 603 | * @since JDK1.1 |
| 604 | */ |
| 605 | public double [][] getLayoutWeights () { |
| 606 | if (layoutInfo == null) |
| 607 | return new double[2][0]; |
| 608 | |
| 609 | double weights[][] = new double [2][]; |
| 610 | weights[0] = new double[layoutInfo.width]; |
| 611 | weights[1] = new double[layoutInfo.height]; |
| 612 | |
| 613 | System.arraycopy(layoutInfo.weightX, 0, weights[0], 0, layoutInfo.width); |
| 614 | System.arraycopy(layoutInfo.weightY, 0, weights[1], 0, layoutInfo.height); |
| 615 | |
| 616 | return weights; |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * Determines which cell in the layout grid contains the point |
| 621 | * specified by <code>(x, y)</code>. Each cell is identified |
| 622 | * by its column index (ranging from 0 to the number of columns |
| 623 | * minus 1) and its row index (ranging from 0 to the number of |
| 624 | * rows minus 1). |
| 625 | * <p> |
| 626 | * If the <code>(x, y)</code> point lies |
| 627 | * outside the grid, the following rules are used. |
| 628 | * The column index is returned as zero if <code>x</code> lies to the |
| 629 | * left of the layout for a left-to-right container or to the right of |
| 630 | * the layout for a right-to-left container. The column index is returned |
| 631 | * as the number of columns if <code>x</code> lies |
| 632 | * to the right of the layout in a left-to-right container or to the left |
| 633 | * in a right-to-left container. |
| 634 | * The row index is returned as zero if <code>y</code> lies above the |
| 635 | * layout, and as the number of rows if <code>y</code> lies |
| 636 | * below the layout. The orientation of a container is determined by its |
| 637 | * <code>ComponentOrientation</code> property. |
| 638 | * @param x the <i>x</i> coordinate of a point |
| 639 | * @param y the <i>y</i> coordinate of a point |
| 640 | * @return an ordered pair of indexes that indicate which cell |
| 641 | * in the layout grid contains the point |
| 642 | * (<i>x</i>, <i>y</i>). |
| 643 | * @see java.awt.ComponentOrientation |
| 644 | * @since JDK1.1 |
| 645 | */ |
| 646 | public Point location(int x, int y) { |
| 647 | Point loc = new Point(0,0); |
| 648 | int i, d; |
| 649 | |
| 650 | if (layoutInfo == null) |
| 651 | return loc; |
| 652 | |
| 653 | d = layoutInfo.startx; |
| 654 | if (!rightToLeft) { |
| 655 | for (i=0; i<layoutInfo.width; i++) { |
| 656 | d += layoutInfo.minWidth[i]; |
| 657 | if (d > x) |
| 658 | break; |
| 659 | } |
| 660 | } else { |
| 661 | for (i=layoutInfo.width-1; i>=0; i--) { |
| 662 | if (d > x) |
| 663 | break; |
| 664 | d += layoutInfo.minWidth[i]; |
| 665 | } |
| 666 | i++; |
| 667 | } |
| 668 | loc.x = i; |
| 669 | |
| 670 | d = layoutInfo.starty; |
| 671 | for (i=0; i<layoutInfo.height; i++) { |
| 672 | d += layoutInfo.minHeight[i]; |
| 673 | if (d > y) |
| 674 | break; |
| 675 | } |
| 676 | loc.y = i; |
| 677 | |
| 678 | return loc; |
| 679 | } |
| 680 | |
| 681 | /** |
| 682 | * Has no effect, since this layout manager does not use a per-component string. |
| 683 | */ |
| 684 | public void addLayoutComponent(String name, Component comp) { |
| 685 | } |
| 686 | |
| 687 | /** |
| 688 | * Adds the specified component to the layout, using the specified |
| 689 | * <code>constraints</code> object. Note that constraints |
| 690 | * are mutable and are, therefore, cloned when cached. |
| 691 | * |
| 692 | * @param comp the component to be added |
| 693 | * @param constraints an object that determines how |
| 694 | * the component is added to the layout |
| 695 | * @exception IllegalArgumentException if <code>constraints</code> |
| 696 | * is not a <code>GridBagConstraint</code> |
| 697 | */ |
| 698 | public void addLayoutComponent(Component comp, Object constraints) { |
| 699 | if (constraints instanceof GridBagConstraints) { |
| 700 | setConstraints(comp, (GridBagConstraints)constraints); |
| 701 | } else if (constraints != null) { |
| 702 | throw new IllegalArgumentException("cannot add to layout: constraints must be a GridBagConstraint"); |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | /** |
| 707 | * Removes the specified component from this layout. |
| 708 | * <p> |
| 709 | * Most applications do not call this method directly. |
| 710 | * @param comp the component to be removed. |
| 711 | * @see java.awt.Container#remove(java.awt.Component) |
| 712 | * @see java.awt.Container#removeAll() |
| 713 | */ |
| 714 | public void removeLayoutComponent(Component comp) { |
| 715 | removeConstraints(comp); |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * Determines the preferred size of the <code>parent</code> |
| 720 | * container using this grid bag layout. |
| 721 | * <p> |
| 722 | * Most applications do not call this method directly. |
| 723 | * |
| 724 | * @param parent the container in which to do the layout |
| 725 | * @see java.awt.Container#getPreferredSize |
| 726 | * @return the preferred size of the <code>parent</code> |
| 727 | * container |
| 728 | */ |
| 729 | public Dimension preferredLayoutSize(Container parent) { |
| 730 | GridBagLayoutInfo info = getLayoutInfo(parent, PREFERREDSIZE); |
| 731 | return getMinSize(parent, info); |
| 732 | } |
| 733 | |
| 734 | /** |
| 735 | * Determines the minimum size of the <code>parent</code> container |
| 736 | * using this grid bag layout. |
| 737 | * <p> |
| 738 | * Most applications do not call this method directly. |
| 739 | * @param parent the container in which to do the layout |
| 740 | * @see java.awt.Container#doLayout |
| 741 | * @return the minimum size of the <code>parent</code> container |
| 742 | */ |
| 743 | public Dimension minimumLayoutSize(Container parent) { |
| 744 | GridBagLayoutInfo info = getLayoutInfo(parent, MINSIZE); |
| 745 | return getMinSize(parent, info); |
| 746 | } |
| 747 | |
| 748 | /** |
| 749 | * Returns the maximum dimensions for this layout given the components |
| 750 | * in the specified target container. |
| 751 | * @param target the container which needs to be laid out |
| 752 | * @see Container |
| 753 | * @see #minimumLayoutSize(Container) |
| 754 | * @see #preferredLayoutSize(Container) |
| 755 | * @return the maximum dimensions for this layout |
| 756 | */ |
| 757 | public Dimension maximumLayoutSize(Container target) { |
| 758 | return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); |
| 759 | } |
| 760 | |
| 761 | /** |
| 762 | * Returns the alignment along the x axis. This specifies how |
| 763 | * the component would like to be aligned relative to other |
| 764 | * components. The value should be a number between 0 and 1 |
| 765 | * where 0 represents alignment along the origin, 1 is aligned |
| 766 | * the furthest away from the origin, 0.5 is centered, etc. |
| 767 | * <p> |
| 768 | * @return the value <code>0.5f</code> to indicate centered |
| 769 | */ |
| 770 | public float getLayoutAlignmentX(Container parent) { |
| 771 | return 0.5f; |
| 772 | } |
| 773 | |
| 774 | /** |
| 775 | * Returns the alignment along the y axis. This specifies how |
| 776 | * the component would like to be aligned relative to other |
| 777 | * components. The value should be a number between 0 and 1 |
| 778 | * where 0 represents alignment along the origin, 1 is aligned |
| 779 | * the furthest away from the origin, 0.5 is centered, etc. |
| 780 | * <p> |
| 781 | * @return the value <code>0.5f</code> to indicate centered |
| 782 | */ |
| 783 | public float getLayoutAlignmentY(Container parent) { |
| 784 | return 0.5f; |
| 785 | } |
| 786 | |
| 787 | /** |
| 788 | * Invalidates the layout, indicating that if the layout manager |
| 789 | * has cached information it should be discarded. |
| 790 | */ |
| 791 | public void invalidateLayout(Container target) { |
| 792 | } |
| 793 | |
| 794 | /** |
| 795 | * Lays out the specified container using this grid bag layout. |
| 796 | * This method reshapes components in the specified container in |
| 797 | * order to satisfy the contraints of this <code>GridBagLayout</code> |
| 798 | * object. |
| 799 | * <p> |
| 800 | * Most applications do not call this method directly. |
| 801 | * @param parent the container in which to do the layout |
| 802 | * @see java.awt.Container |
| 803 | * @see java.awt.Container#doLayout |
| 804 | */ |
| 805 | public void layoutContainer(Container parent) { |
| 806 | arrangeGrid(parent); |
| 807 | } |
| 808 | |
| 809 | /** |
| 810 | * Returns a string representation of this grid bag layout's values. |
| 811 | * @return a string representation of this grid bag layout. |
| 812 | */ |
| 813 | public String toString() { |
| 814 | return getClass().getName(); |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * Print the layout information. Useful for debugging. |
| 819 | */ |
| 820 | |
| 821 | /* DEBUG |
| 822 | * |
| 823 | * protected void dumpLayoutInfo(GridBagLayoutInfo s) { |
| 824 | * int x; |
| 825 | * |
| 826 | * System.out.println("Col\tWidth\tWeight"); |
| 827 | * for (x=0; x<s.width; x++) { |
| 828 | * System.out.println(x + "\t" + |
| 829 | * s.minWidth[x] + "\t" + |
| 830 | * s.weightX[x]); |
| 831 | * } |
| 832 | * System.out.println("Row\tHeight\tWeight"); |
| 833 | * for (x=0; x<s.height; x++) { |
| 834 | * System.out.println(x + "\t" + |
| 835 | * s.minHeight[x] + "\t" + |
| 836 | * s.weightY[x]); |
| 837 | * } |
| 838 | * } |
| 839 | */ |
| 840 | |
| 841 | /** |
| 842 | * Print the layout constraints. Useful for debugging. |
| 843 | */ |
| 844 | |
| 845 | /* DEBUG |
| 846 | * |
| 847 | * protected void dumpConstraints(GridBagConstraints constraints) { |
| 848 | * System.out.println( |
| 849 | * "wt " + |
| 850 | * constraints.weightx + |
| 851 | * " " + |
| 852 | * constraints.weighty + |
| 853 | * ", " + |
| 854 | * |
| 855 | * "box " + |
| 856 | * constraints.gridx + |
| 857 | * " " + |
| 858 | * constraints.gridy + |
| 859 | * " " + |
| 860 | * constraints.gridwidth + |
| 861 | * " " + |
| 862 | * constraints.gridheight + |
| 863 | * ", " + |
| 864 | * |
| 865 | * "min " + |
| 866 | * constraints.minWidth + |
| 867 | * " " + |
| 868 | * constraints.minHeight + |
| 869 | * ", " + |
| 870 | * |
| 871 | * "pad " + |
| 872 | * constraints.insets.bottom + |
| 873 | * " " + |
| 874 | * constraints.insets.left + |
| 875 | * " " + |
| 876 | * constraints.insets.right + |
| 877 | * " " + |
| 878 | * constraints.insets.top + |
| 879 | * " " + |
| 880 | * constraints.ipadx + |
| 881 | * " " + |
| 882 | * constraints.ipady); |
| 883 | * } |
| 884 | */ |
| 885 | |
| 886 | /** |
| 887 | * Fills in an instance of <code>GridBagLayoutInfo</code> for the |
| 888 | * current set of managed children. This requires three passes through the |
| 889 | * set of children: |
| 890 | * |
| 891 | * <ol> |
| 892 | * <li>Figure out the dimensions of the layout grid. |
| 893 | * <li>Determine which cells the components occupy. |
| 894 | * <li>Distribute the weights and min sizes amoung the rows/columns. |
| 895 | * </ol> |
| 896 | * |
| 897 | * This also caches the minsizes for all the children when they are |
| 898 | * first encountered (so subsequent loops don't need to ask again). |
| 899 | * <p> |
| 900 | * This method should only be used internally by |
| 901 | * <code>GridBagLayout</code>. |
| 902 | * |
| 903 | * @param parent the layout container |
| 904 | * @param sizeflag either <code>PREFERREDSIZE</code> or |
| 905 | * <code>MINSIZE</code> |
| 906 | * @return the <code>GridBagLayoutInfo</code> for the set of children |
| 907 | * @since 1.4 |
| 908 | */ |
| 909 | protected GridBagLayoutInfo getLayoutInfo(Container parent, int sizeflag) { |
| 910 | return GetLayoutInfo(parent, sizeflag); |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * Calculate maximum array sizes to allocate arrays without ensureCapacity |
| 915 | * we may use preCalculated sizes in whole class because of upper estimation of |
| 916 | * maximumArrayXIndex and maximumArrayYIndex. |
| 917 | */ |
| 918 | |
| 919 | private long[] preInitMaximumArraySizes(Container parent){ |
| 920 | Component components[] = parent.getComponents(); |
| 921 | Component comp; |
| 922 | GridBagConstraints constraints; |
| 923 | int curX, curY; |
| 924 | int curWidth, curHeight; |
| 925 | int preMaximumArrayXIndex = 0; |
| 926 | int preMaximumArrayYIndex = 0; |
| 927 | long [] returnArray = new long[2]; |
| 928 | |
| 929 | for (int compId = 0 ; compId < components.length ; compId++) { |
| 930 | comp = components[compId]; |
| 931 | if (!comp.isVisible()) { |
| 932 | continue; |
| 933 | } |
| 934 | |
| 935 | constraints = lookupConstraints(comp); |
| 936 | curX = constraints.gridx; |
| 937 | curY = constraints.gridy; |
| 938 | curWidth = constraints.gridwidth; |
| 939 | curHeight = constraints.gridheight; |
| 940 | |
| 941 | // -1==RELATIVE, means that column|row equals to previously added component, |
| 942 | // since each next Component with gridx|gridy == RELATIVE starts from |
| 943 | // previous position, so we should start from previous component which |
| 944 | // already used in maximumArray[X|Y]Index calculation. We could just increase |
| 945 | // maximum by 1 to handle situation when component with gridx=-1 was added. |
| 946 | if (curX < 0){ |
| 947 | curX = ++preMaximumArrayYIndex; |
| 948 | } |
| 949 | if (curY < 0){ |
| 950 | curY = ++preMaximumArrayXIndex; |
| 951 | } |
| 952 | // gridwidth|gridheight may be equal to RELATIVE (-1) or REMAINDER (0) |
| 953 | // in any case using 1 instead of 0 or -1 should be sufficient to for |
| 954 | // correct maximumArraySizes calculation |
| 955 | if (curWidth <= 0){ |
| 956 | curWidth = 1; |
| 957 | } |
| 958 | if (curHeight <= 0){ |
| 959 | curHeight = 1; |
| 960 | } |
| 961 | |
| 962 | preMaximumArrayXIndex = Math.max(curY + curHeight, preMaximumArrayXIndex); |
| 963 | preMaximumArrayYIndex = Math.max(curX + curWidth, preMaximumArrayYIndex); |
| 964 | } //for (components) loop |
| 965 | // Must specify index++ to allocate well-working arrays. |
| 966 | /* fix for 4623196. |
| 967 | * now return long array instead of Point |
| 968 | */ |
| 969 | returnArray[0] = preMaximumArrayXIndex; |
| 970 | returnArray[1] = preMaximumArrayYIndex; |
| 971 | return returnArray; |
| 972 | } //PreInitMaximumSizes |
| 973 | |
| 974 | /** |
| 975 | * This method is obsolete and supplied for backwards |
| 976 | * compatability only; new code should call {@link |
| 977 | * #getLayoutInfo(java.awt.Container, int) getLayoutInfo} instead. |
| 978 | * This method is the same as <code>getLayoutInfo</code>; |
| 979 | * refer to <code>getLayoutInfo</code> for details on parameters |
| 980 | * and return value. |
| 981 | */ |
| 982 | protected GridBagLayoutInfo GetLayoutInfo(Container parent, int sizeflag) { |
| 983 | synchronized (parent.getTreeLock()) { |
| 984 | GridBagLayoutInfo r; |
| 985 | Component comp; |
| 986 | GridBagConstraints constraints; |
| 987 | Dimension d; |
| 988 | Component components[] = parent.getComponents(); |
| 989 | // Code below will address index curX+curWidth in the case of yMaxArray, weightY |
| 990 | // ( respectively curY+curHeight for xMaxArray, weightX ) where |
| 991 | // curX in 0 to preInitMaximumArraySizes.y |
| 992 | // Thus, the maximum index that could |
| 993 | // be calculated in the following code is curX+curX. |
| 994 | // EmpericMultier equals 2 because of this. |
| 995 | |
| 996 | int layoutWidth, layoutHeight; |
| 997 | int []xMaxArray; |
| 998 | int []yMaxArray; |
| 999 | int compindex, i, k, px, py, pixels_diff, nextSize; |
| 1000 | int curX = 0; // constraints.gridx |
| 1001 | int curY = 0; // constraints.gridy |
| 1002 | int curWidth = 1; // constraints.gridwidth |
| 1003 | int curHeight = 1; // constraints.gridheight |
| 1004 | int curRow, curCol; |
| 1005 | double weight_diff, weight; |
| 1006 | int maximumArrayXIndex = 0; |
| 1007 | int maximumArrayYIndex = 0; |
| 1008 | int anchor; |
| 1009 | |
| 1010 | /* |
| 1011 | * Pass #1 |
| 1012 | * |
| 1013 | * Figure out the dimensions of the layout grid (use a value of 1 for |
| 1014 | * zero or negative widths and heights). |
| 1015 | */ |
| 1016 | |
| 1017 | layoutWidth = layoutHeight = 0; |
| 1018 | curRow = curCol = -1; |
| 1019 | long [] arraySizes = preInitMaximumArraySizes(parent); |
| 1020 | |
| 1021 | /* fix for 4623196. |
| 1022 | * If user try to create a very big grid we can |
| 1023 | * get NegativeArraySizeException because of integer value |
| 1024 | * overflow (EMPIRICMULTIPLIER*gridSize might be more then Integer.MAX_VALUE). |
| 1025 | * We need to detect this situation and try to create a |
| 1026 | * grid with Integer.MAX_VALUE size instead. |
| 1027 | */ |
| 1028 | maximumArrayXIndex = (EMPIRICMULTIPLIER * arraySizes[0] > Integer.MAX_VALUE )? Integer.MAX_VALUE : EMPIRICMULTIPLIER*(int)arraySizes[0]; |
| 1029 | maximumArrayYIndex = (EMPIRICMULTIPLIER * arraySizes[1] > Integer.MAX_VALUE )? Integer.MAX_VALUE : EMPIRICMULTIPLIER*(int)arraySizes[1]; |
| 1030 | |
| 1031 | if (rowHeights != null){ |
| 1032 | maximumArrayXIndex = Math.max(maximumArrayXIndex, rowHeights.length); |
| 1033 | } |
| 1034 | if (columnWidths != null){ |
| 1035 | maximumArrayYIndex = Math.max(maximumArrayYIndex, columnWidths.length); |
| 1036 | } |
| 1037 | |
| 1038 | xMaxArray = new int[maximumArrayXIndex]; |
| 1039 | yMaxArray = new int[maximumArrayYIndex]; |
| 1040 | |
| 1041 | boolean hasBaseline = false; |
| 1042 | for (compindex = 0 ; compindex < components.length ; compindex++) { |
| 1043 | comp = components[compindex]; |
| 1044 | if (!comp.isVisible()) |
| 1045 | continue; |
| 1046 | constraints = lookupConstraints(comp); |
| 1047 | |
| 1048 | curX = constraints.gridx; |
| 1049 | curY = constraints.gridy; |
| 1050 | curWidth = constraints.gridwidth; |
| 1051 | if (curWidth <= 0) |
| 1052 | curWidth = 1; |
| 1053 | curHeight = constraints.gridheight; |
| 1054 | if (curHeight <= 0) |
| 1055 | curHeight = 1; |
| 1056 | |
| 1057 | /* If x or y is negative, then use relative positioning: */ |
| 1058 | if (curX < 0 && curY < 0) { |
| 1059 | if (curRow >= 0) |
| 1060 | curY = curRow; |
| 1061 | else if (curCol >= 0) |
| 1062 | curX = curCol; |
| 1063 | else |
| 1064 | curY = 0; |
| 1065 | } |
| 1066 | if (curX < 0) { |
| 1067 | px = 0; |
| 1068 | for (i = curY; i < (curY + curHeight); i++) { |
| 1069 | px = Math.max(px, xMaxArray[i]); |
| 1070 | } |
| 1071 | |
| 1072 | curX = px - curX - 1; |
| 1073 | if(curX < 0) |
| 1074 | curX = 0; |
| 1075 | } |
| 1076 | else if (curY < 0) { |
| 1077 | py = 0; |
| 1078 | for (i = curX; i < (curX + curWidth); i++) { |
| 1079 | py = Math.max(py, yMaxArray[i]); |
| 1080 | } |
| 1081 | curY = py - curY - 1; |
| 1082 | if(curY < 0) |
| 1083 | curY = 0; |
| 1084 | } |
| 1085 | |
| 1086 | /* Adjust the grid width and height |
| 1087 | * fix for 5005945: unneccessary loops removed |
| 1088 | */ |
| 1089 | px = curX + curWidth; |
| 1090 | if (layoutWidth < px) { |
| 1091 | layoutWidth = px; |
| 1092 | } |
| 1093 | py = curY + curHeight; |
| 1094 | if (layoutHeight < py) { |
| 1095 | layoutHeight = py; |
| 1096 | } |
| 1097 | |
| 1098 | /* Adjust xMaxArray and yMaxArray */ |
| 1099 | for (i = curX; i < (curX + curWidth); i++) { |
| 1100 | yMaxArray[i] =py; |
| 1101 | } |
| 1102 | for (i = curY; i < (curY + curHeight); i++) { |
| 1103 | xMaxArray[i] = px; |
| 1104 | } |
| 1105 | |
| 1106 | |
| 1107 | /* Cache the current slave's size. */ |
| 1108 | if (sizeflag == PREFERREDSIZE) |
| 1109 | d = comp.getPreferredSize(); |
| 1110 | else |
| 1111 | d = comp.getMinimumSize(); |
| 1112 | constraints.minWidth = d.width; |
| 1113 | constraints.minHeight = d.height; |
| 1114 | if (calculateBaseline(comp, constraints, d)) { |
| 1115 | hasBaseline = true; |
| 1116 | } |
| 1117 | |
| 1118 | /* Zero width and height must mean that this is the last item (or |
| 1119 | * else something is wrong). */ |
| 1120 | if (constraints.gridheight == 0 && constraints.gridwidth == 0) |
| 1121 | curRow = curCol = -1; |
| 1122 | |
| 1123 | /* Zero width starts a new row */ |
| 1124 | if (constraints.gridheight == 0 && curRow < 0) |
| 1125 | curCol = curX + curWidth; |
| 1126 | |
| 1127 | /* Zero height starts a new column */ |
| 1128 | else if (constraints.gridwidth == 0 && curCol < 0) |
| 1129 | curRow = curY + curHeight; |
| 1130 | } //for (components) loop |
| 1131 | |
| 1132 | |
| 1133 | /* |
| 1134 | * Apply minimum row/column dimensions |
| 1135 | */ |
| 1136 | if (columnWidths != null && layoutWidth < columnWidths.length) |
| 1137 | layoutWidth = columnWidths.length; |
| 1138 | if (rowHeights != null && layoutHeight < rowHeights.length) |
| 1139 | layoutHeight = rowHeights.length; |
| 1140 | |
| 1141 | r = new GridBagLayoutInfo(layoutWidth, layoutHeight); |
| 1142 | |
| 1143 | /* |
| 1144 | * Pass #2 |
| 1145 | * |
| 1146 | * Negative values for gridX are filled in with the current x value. |
| 1147 | * Negative values for gridY are filled in with the current y value. |
| 1148 | * Negative or zero values for gridWidth and gridHeight end the current |
| 1149 | * row or column, respectively. |
| 1150 | */ |
| 1151 | |
| 1152 | curRow = curCol = -1; |
| 1153 | |
| 1154 | Arrays.fill(xMaxArray, 0); |
| 1155 | Arrays.fill(yMaxArray, 0); |
| 1156 | |
| 1157 | int[] maxAscent = null; |
| 1158 | int[] maxDescent = null; |
| 1159 | short[] baselineType = null; |
| 1160 | |
| 1161 | if (hasBaseline) { |
| 1162 | r.maxAscent = maxAscent = new int[layoutHeight]; |
| 1163 | r.maxDescent = maxDescent = new int[layoutHeight]; |
| 1164 | r.baselineType = baselineType = new short[layoutHeight]; |
| 1165 | r.hasBaseline = true; |
| 1166 | } |
| 1167 | |
| 1168 | |
| 1169 | for (compindex = 0 ; compindex < components.length ; compindex++) { |
| 1170 | comp = components[compindex]; |
| 1171 | if (!comp.isVisible()) |
| 1172 | continue; |
| 1173 | constraints = lookupConstraints(comp); |
| 1174 | |
| 1175 | curX = constraints.gridx; |
| 1176 | curY = constraints.gridy; |
| 1177 | curWidth = constraints.gridwidth; |
| 1178 | curHeight = constraints.gridheight; |
| 1179 | |
| 1180 | /* If x or y is negative, then use relative positioning: */ |
| 1181 | if (curX < 0 && curY < 0) { |
| 1182 | if(curRow >= 0) |
| 1183 | curY = curRow; |
| 1184 | else if(curCol >= 0) |
| 1185 | curX = curCol; |
| 1186 | else |
| 1187 | curY = 0; |
| 1188 | } |
| 1189 | |
| 1190 | if (curX < 0) { |
| 1191 | if (curHeight <= 0) { |
| 1192 | curHeight += r.height - curY; |
| 1193 | if (curHeight < 1) |
| 1194 | curHeight = 1; |
| 1195 | } |
| 1196 | |
| 1197 | px = 0; |
| 1198 | for (i = curY; i < (curY + curHeight); i++) |
| 1199 | px = Math.max(px, xMaxArray[i]); |
| 1200 | |
| 1201 | curX = px - curX - 1; |
| 1202 | if(curX < 0) |
| 1203 | curX = 0; |
| 1204 | } |
| 1205 | else if (curY < 0) { |
| 1206 | if (curWidth <= 0) { |
| 1207 | curWidth += r.width - curX; |
| 1208 | if (curWidth < 1) |
| 1209 | curWidth = 1; |
| 1210 | } |
| 1211 | |
| 1212 | py = 0; |
| 1213 | for (i = curX; i < (curX + curWidth); i++){ |
| 1214 | py = Math.max(py, yMaxArray[i]); |
| 1215 | } |
| 1216 | |
| 1217 | curY = py - curY - 1; |
| 1218 | if(curY < 0) |
| 1219 | curY = 0; |
| 1220 | } |
| 1221 | |
| 1222 | if (curWidth <= 0) { |
| 1223 | curWidth += r.width - curX; |
| 1224 | if (curWidth < 1) |
| 1225 | curWidth = 1; |
| 1226 | } |
| 1227 | |
| 1228 | if (curHeight <= 0) { |
| 1229 | curHeight += r.height - curY; |
| 1230 | if (curHeight < 1) |
| 1231 | curHeight = 1; |
| 1232 | } |
| 1233 | |
| 1234 | px = curX + curWidth; |
| 1235 | py = curY + curHeight; |
| 1236 | |
| 1237 | for (i = curX; i < (curX + curWidth); i++) { yMaxArray[i] = py; } |
| 1238 | for (i = curY; i < (curY + curHeight); i++) { xMaxArray[i] = px; } |
| 1239 | |
| 1240 | /* Make negative sizes start a new row/column */ |
| 1241 | if (constraints.gridheight == 0 && constraints.gridwidth == 0) |
| 1242 | curRow = curCol = -1; |
| 1243 | if (constraints.gridheight == 0 && curRow < 0) |
| 1244 | curCol = curX + curWidth; |
| 1245 | else if (constraints.gridwidth == 0 && curCol < 0) |
| 1246 | curRow = curY + curHeight; |
| 1247 | |
| 1248 | /* Assign the new values to the gridbag slave */ |
| 1249 | constraints.tempX = curX; |
| 1250 | constraints.tempY = curY; |
| 1251 | constraints.tempWidth = curWidth; |
| 1252 | constraints.tempHeight = curHeight; |
| 1253 | |
| 1254 | anchor = constraints.anchor; |
| 1255 | if (hasBaseline) { |
| 1256 | switch(anchor) { |
| 1257 | case GridBagConstraints.BASELINE: |
| 1258 | case GridBagConstraints.BASELINE_LEADING: |
| 1259 | case GridBagConstraints.BASELINE_TRAILING: |
| 1260 | if (constraints.ascent >= 0) { |
| 1261 | if (curHeight == 1) { |
| 1262 | maxAscent[curY] = |
| 1263 | Math.max(maxAscent[curY], |
| 1264 | constraints.ascent); |
| 1265 | maxDescent[curY] = |
| 1266 | Math.max(maxDescent[curY], |
| 1267 | constraints.descent); |
| 1268 | } |
| 1269 | else { |
| 1270 | if (constraints.baselineResizeBehavior == |
| 1271 | Component.BaselineResizeBehavior. |
| 1272 | CONSTANT_DESCENT) { |
| 1273 | maxDescent[curY + curHeight - 1] = |
| 1274 | Math.max(maxDescent[curY + curHeight |
| 1275 | - 1], |
| 1276 | constraints.descent); |
| 1277 | } |
| 1278 | else { |
| 1279 | maxAscent[curY] = Math.max(maxAscent[curY], |
| 1280 | constraints.ascent); |
| 1281 | } |
| 1282 | } |
| 1283 | if (constraints.baselineResizeBehavior == |
| 1284 | Component.BaselineResizeBehavior.CONSTANT_DESCENT) { |
| 1285 | baselineType[curY + curHeight - 1] |= |
| 1286 | (1 << constraints. |
| 1287 | baselineResizeBehavior.ordinal()); |
| 1288 | } |
| 1289 | else { |
| 1290 | baselineType[curY] |= (1 << constraints. |
| 1291 | baselineResizeBehavior.ordinal()); |
| 1292 | } |
| 1293 | } |
| 1294 | break; |
| 1295 | case GridBagConstraints.ABOVE_BASELINE: |
| 1296 | case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| 1297 | case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| 1298 | // Component positioned above the baseline. |
| 1299 | // To make the bottom edge of the component aligned |
| 1300 | // with the baseline the bottom inset is |
| 1301 | // added to the descent, the rest to the ascent. |
| 1302 | pixels_diff = constraints.minHeight + |
| 1303 | constraints.insets.top + |
| 1304 | constraints.ipady; |
| 1305 | maxAscent[curY] = Math.max(maxAscent[curY], |
| 1306 | pixels_diff); |
| 1307 | maxDescent[curY] = Math.max(maxDescent[curY], |
| 1308 | constraints.insets.bottom); |
| 1309 | break; |
| 1310 | case GridBagConstraints.BELOW_BASELINE: |
| 1311 | case GridBagConstraints.BELOW_BASELINE_LEADING: |
| 1312 | case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| 1313 | // Component positioned below the baseline. |
| 1314 | // To make the top edge of the component aligned |
| 1315 | // with the baseline the top inset is |
| 1316 | // added to the ascent, the rest to the descent. |
| 1317 | pixels_diff = constraints.minHeight + |
| 1318 | constraints.insets.bottom + constraints.ipady; |
| 1319 | maxDescent[curY] = Math.max(maxDescent[curY], |
| 1320 | pixels_diff); |
| 1321 | maxAscent[curY] = Math.max(maxAscent[curY], |
| 1322 | constraints.insets.top); |
| 1323 | break; |
| 1324 | } |
| 1325 | } |
| 1326 | } |
| 1327 | |
| 1328 | r.weightX = new double[maximumArrayYIndex]; |
| 1329 | r.weightY = new double[maximumArrayXIndex]; |
| 1330 | r.minWidth = new int[maximumArrayYIndex]; |
| 1331 | r.minHeight = new int[maximumArrayXIndex]; |
| 1332 | |
| 1333 | |
| 1334 | /* |
| 1335 | * Apply minimum row/column dimensions and weights |
| 1336 | */ |
| 1337 | if (columnWidths != null) |
| 1338 | System.arraycopy(columnWidths, 0, r.minWidth, 0, columnWidths.length); |
| 1339 | if (rowHeights != null) |
| 1340 | System.arraycopy(rowHeights, 0, r.minHeight, 0, rowHeights.length); |
| 1341 | if (columnWeights != null) |
| 1342 | System.arraycopy(columnWeights, 0, r.weightX, 0, Math.min(r.weightX.length, columnWeights.length)); |
| 1343 | if (rowWeights != null) |
| 1344 | System.arraycopy(rowWeights, 0, r.weightY, 0, Math.min(r.weightY.length, rowWeights.length)); |
| 1345 | |
| 1346 | /* |
| 1347 | * Pass #3 |
| 1348 | * |
| 1349 | * Distribute the minimun widths and weights: |
| 1350 | */ |
| 1351 | |
| 1352 | nextSize = Integer.MAX_VALUE; |
| 1353 | |
| 1354 | for (i = 1; |
| 1355 | i != Integer.MAX_VALUE; |
| 1356 | i = nextSize, nextSize = Integer.MAX_VALUE) { |
| 1357 | for (compindex = 0 ; compindex < components.length ; compindex++) { |
| 1358 | comp = components[compindex]; |
| 1359 | if (!comp.isVisible()) |
| 1360 | continue; |
| 1361 | constraints = lookupConstraints(comp); |
| 1362 | |
| 1363 | if (constraints.tempWidth == i) { |
| 1364 | px = constraints.tempX + constraints.tempWidth; /* right column */ |
| 1365 | |
| 1366 | /* |
| 1367 | * Figure out if we should use this slave\'s weight. If the weight |
| 1368 | * is less than the total weight spanned by the width of the cell, |
| 1369 | * then discard the weight. Otherwise split the difference |
| 1370 | * according to the existing weights. |
| 1371 | */ |
| 1372 | |
| 1373 | weight_diff = constraints.weightx; |
| 1374 | for (k = constraints.tempX; k < px; k++) |
| 1375 | weight_diff -= r.weightX[k]; |
| 1376 | if (weight_diff > 0.0) { |
| 1377 | weight = 0.0; |
| 1378 | for (k = constraints.tempX; k < px; k++) |
| 1379 | weight += r.weightX[k]; |
| 1380 | for (k = constraints.tempX; weight > 0.0 && k < px; k++) { |
| 1381 | double wt = r.weightX[k]; |
| 1382 | double dx = (wt * weight_diff) / weight; |
| 1383 | r.weightX[k] += dx; |
| 1384 | weight_diff -= dx; |
| 1385 | weight -= wt; |
| 1386 | } |
| 1387 | /* Assign the remainder to the rightmost cell */ |
| 1388 | r.weightX[px-1] += weight_diff; |
| 1389 | } |
| 1390 | |
| 1391 | /* |
| 1392 | * Calculate the minWidth array values. |
| 1393 | * First, figure out how wide the current slave needs to be. |
| 1394 | * Then, see if it will fit within the current minWidth values. |
| 1395 | * If it will not fit, add the difference according to the |
| 1396 | * weightX array. |
| 1397 | */ |
| 1398 | |
| 1399 | pixels_diff = |
| 1400 | constraints.minWidth + constraints.ipadx + |
| 1401 | constraints.insets.left + constraints.insets.right; |
| 1402 | |
| 1403 | for (k = constraints.tempX; k < px; k++) |
| 1404 | pixels_diff -= r.minWidth[k]; |
| 1405 | if (pixels_diff > 0) { |
| 1406 | weight = 0.0; |
| 1407 | for (k = constraints.tempX; k < px; k++) |
| 1408 | weight += r.weightX[k]; |
| 1409 | for (k = constraints.tempX; weight > 0.0 && k < px; k++) { |
| 1410 | double wt = r.weightX[k]; |
| 1411 | int dx = (int)((wt * ((double)pixels_diff)) / weight); |
| 1412 | r.minWidth[k] += dx; |
| 1413 | pixels_diff -= dx; |
| 1414 | weight -= wt; |
| 1415 | } |
| 1416 | /* Any leftovers go into the rightmost cell */ |
| 1417 | r.minWidth[px-1] += pixels_diff; |
| 1418 | } |
| 1419 | } |
| 1420 | else if (constraints.tempWidth > i && constraints.tempWidth < nextSize) |
| 1421 | nextSize = constraints.tempWidth; |
| 1422 | |
| 1423 | |
| 1424 | if (constraints.tempHeight == i) { |
| 1425 | py = constraints.tempY + constraints.tempHeight; /* bottom row */ |
| 1426 | |
| 1427 | /* |
| 1428 | * Figure out if we should use this slave's weight. If the weight |
| 1429 | * is less than the total weight spanned by the height of the cell, |
| 1430 | * then discard the weight. Otherwise split it the difference |
| 1431 | * according to the existing weights. |
| 1432 | */ |
| 1433 | |
| 1434 | weight_diff = constraints.weighty; |
| 1435 | for (k = constraints.tempY; k < py; k++) |
| 1436 | weight_diff -= r.weightY[k]; |
| 1437 | if (weight_diff > 0.0) { |
| 1438 | weight = 0.0; |
| 1439 | for (k = constraints.tempY; k < py; k++) |
| 1440 | weight += r.weightY[k]; |
| 1441 | for (k = constraints.tempY; weight > 0.0 && k < py; k++) { |
| 1442 | double wt = r.weightY[k]; |
| 1443 | double dy = (wt * weight_diff) / weight; |
| 1444 | r.weightY[k] += dy; |
| 1445 | weight_diff -= dy; |
| 1446 | weight -= wt; |
| 1447 | } |
| 1448 | /* Assign the remainder to the bottom cell */ |
| 1449 | r.weightY[py-1] += weight_diff; |
| 1450 | } |
| 1451 | |
| 1452 | /* |
| 1453 | * Calculate the minHeight array values. |
| 1454 | * First, figure out how tall the current slave needs to be. |
| 1455 | * Then, see if it will fit within the current minHeight values. |
| 1456 | * If it will not fit, add the difference according to the |
| 1457 | * weightY array. |
| 1458 | */ |
| 1459 | |
| 1460 | pixels_diff = -1; |
| 1461 | if (hasBaseline) { |
| 1462 | switch(constraints.anchor) { |
| 1463 | case GridBagConstraints.BASELINE: |
| 1464 | case GridBagConstraints.BASELINE_LEADING: |
| 1465 | case GridBagConstraints.BASELINE_TRAILING: |
| 1466 | if (constraints.ascent >= 0) { |
| 1467 | if (constraints.tempHeight == 1) { |
| 1468 | pixels_diff = |
| 1469 | maxAscent[constraints.tempY] + |
| 1470 | maxDescent[constraints.tempY]; |
| 1471 | } |
| 1472 | else if (constraints.baselineResizeBehavior != |
| 1473 | Component.BaselineResizeBehavior. |
| 1474 | CONSTANT_DESCENT) { |
| 1475 | pixels_diff = |
| 1476 | maxAscent[constraints.tempY] + |
| 1477 | constraints.descent; |
| 1478 | } |
| 1479 | else { |
| 1480 | pixels_diff = constraints.ascent + |
| 1481 | maxDescent[constraints.tempY + |
| 1482 | constraints.tempHeight - 1]; |
| 1483 | } |
| 1484 | } |
| 1485 | break; |
| 1486 | case GridBagConstraints.ABOVE_BASELINE: |
| 1487 | case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| 1488 | case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| 1489 | pixels_diff = constraints.insets.top + |
| 1490 | constraints.minHeight + |
| 1491 | constraints.ipady + |
| 1492 | maxDescent[constraints.tempY]; |
| 1493 | break; |
| 1494 | case GridBagConstraints.BELOW_BASELINE: |
| 1495 | case GridBagConstraints.BELOW_BASELINE_LEADING: |
| 1496 | case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| 1497 | pixels_diff = maxAscent[constraints.tempY] + |
| 1498 | constraints.minHeight + |
| 1499 | constraints.insets.bottom + |
| 1500 | constraints.ipady; |
| 1501 | break; |
| 1502 | } |
| 1503 | } |
| 1504 | if (pixels_diff == -1) { |
| 1505 | pixels_diff = |
| 1506 | constraints.minHeight + constraints.ipady + |
| 1507 | constraints.insets.top + |
| 1508 | constraints.insets.bottom; |
| 1509 | } |
| 1510 | for (k = constraints.tempY; k < py; k++) |
| 1511 | pixels_diff -= r.minHeight[k]; |
| 1512 | if (pixels_diff > 0) { |
| 1513 | weight = 0.0; |
| 1514 | for (k = constraints.tempY; k < py; k++) |
| 1515 | weight += r.weightY[k]; |
| 1516 | for (k = constraints.tempY; weight > 0.0 && k < py; k++) { |
| 1517 | double wt = r.weightY[k]; |
| 1518 | int dy = (int)((wt * ((double)pixels_diff)) / weight); |
| 1519 | r.minHeight[k] += dy; |
| 1520 | pixels_diff -= dy; |
| 1521 | weight -= wt; |
| 1522 | } |
| 1523 | /* Any leftovers go into the bottom cell */ |
| 1524 | r.minHeight[py-1] += pixels_diff; |
| 1525 | } |
| 1526 | } |
| 1527 | else if (constraints.tempHeight > i && |
| 1528 | constraints.tempHeight < nextSize) |
| 1529 | nextSize = constraints.tempHeight; |
| 1530 | } |
| 1531 | } |
| 1532 | return r; |
| 1533 | } |
| 1534 | } //getLayoutInfo() |
| 1535 | |
| 1536 | /** |
| 1537 | * Calculate the baseline for the specified component. |
| 1538 | * If {@code c} is positioned along it's baseline, the baseline is |
| 1539 | * obtained and the {@code constraints} ascent, descent and |
| 1540 | * baseline resize behavior are set from the component; and true is |
| 1541 | * returned. Otherwise false is returned. |
| 1542 | */ |
| 1543 | private boolean calculateBaseline(Component c, |
| 1544 | GridBagConstraints constraints, |
| 1545 | Dimension size) { |
| 1546 | int anchor = constraints.anchor; |
| 1547 | if (anchor == GridBagConstraints.BASELINE || |
| 1548 | anchor == GridBagConstraints.BASELINE_LEADING || |
| 1549 | anchor == GridBagConstraints.BASELINE_TRAILING) { |
| 1550 | // Apply the padding to the component, then ask for the baseline. |
| 1551 | int w = size.width + constraints.ipadx; |
| 1552 | int h = size.height + constraints.ipady; |
| 1553 | constraints.ascent = c.getBaseline(w, h); |
| 1554 | if (constraints.ascent >= 0) { |
| 1555 | // Component has a baseline |
| 1556 | int baseline = constraints.ascent; |
| 1557 | // Adjust the ascent and descent to include the insets. |
| 1558 | constraints.descent = h - constraints.ascent + |
| 1559 | constraints.insets.bottom; |
| 1560 | constraints.ascent += constraints.insets.top; |
| 1561 | constraints.baselineResizeBehavior = |
| 1562 | c.getBaselineResizeBehavior(); |
| 1563 | constraints.centerPadding = 0; |
| 1564 | if (constraints.baselineResizeBehavior == Component. |
| 1565 | BaselineResizeBehavior.CENTER_OFFSET) { |
| 1566 | // Component has a baseline resize behavior of |
| 1567 | // CENTER_OFFSET, calculate centerPadding and |
| 1568 | // centerOffset (see the description of |
| 1569 | // CENTER_OFFSET in the enum for detais on this |
| 1570 | // algorithm). |
| 1571 | int nextBaseline = c.getBaseline(w, h + 1); |
| 1572 | constraints.centerOffset = baseline - h / 2; |
| 1573 | if (h % 2 == 0) { |
| 1574 | if (baseline != nextBaseline) { |
| 1575 | constraints.centerPadding = 1; |
| 1576 | } |
| 1577 | } |
| 1578 | else if (baseline == nextBaseline){ |
| 1579 | constraints.centerOffset--; |
| 1580 | constraints.centerPadding = 1; |
| 1581 | } |
| 1582 | } |
| 1583 | } |
| 1584 | return true; |
| 1585 | } |
| 1586 | else { |
| 1587 | constraints.ascent = -1; |
| 1588 | return false; |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | /** |
| 1593 | * Adjusts the x, y, width, and height fields to the correct |
| 1594 | * values depending on the constraint geometry and pads. |
| 1595 | * This method should only be used internally by |
| 1596 | * <code>GridBagLayout</code>. |
| 1597 | * |
| 1598 | * @param constraints the constraints to be applied |
| 1599 | * @param r the <code>Rectangle</code> to be adjusted |
| 1600 | * @since 1.4 |
| 1601 | */ |
| 1602 | protected void adjustForGravity(GridBagConstraints constraints, |
| 1603 | Rectangle r) { |
| 1604 | AdjustForGravity(constraints, r); |
| 1605 | } |
| 1606 | |
| 1607 | /** |
| 1608 | * This method is obsolete and supplied for backwards |
| 1609 | * compatability only; new code should call {@link |
| 1610 | * #adjustForGravity(java.awt.GridBagConstraints, java.awt.Rectangle) |
| 1611 | * adjustForGravity} instead. |
| 1612 | * This method is the same as <code>adjustForGravity</code>; |
| 1613 | * refer to <code>adjustForGravity</code> for details |
| 1614 | * on parameters. |
| 1615 | */ |
| 1616 | protected void AdjustForGravity(GridBagConstraints constraints, |
| 1617 | Rectangle r) { |
| 1618 | int diffx, diffy; |
| 1619 | int cellY = r.y; |
| 1620 | int cellHeight = r.height; |
| 1621 | |
| 1622 | if (!rightToLeft) { |
| 1623 | r.x += constraints.insets.left; |
| 1624 | } else { |
| 1625 | r.x -= r.width - constraints.insets.right; |
| 1626 | } |
| 1627 | r.width -= (constraints.insets.left + constraints.insets.right); |
| 1628 | r.y += constraints.insets.top; |
| 1629 | r.height -= (constraints.insets.top + constraints.insets.bottom); |
| 1630 | |
| 1631 | diffx = 0; |
| 1632 | if ((constraints.fill != GridBagConstraints.HORIZONTAL && |
| 1633 | constraints.fill != GridBagConstraints.BOTH) |
| 1634 | && (r.width > (constraints.minWidth + constraints.ipadx))) { |
| 1635 | diffx = r.width - (constraints.minWidth + constraints.ipadx); |
| 1636 | r.width = constraints.minWidth + constraints.ipadx; |
| 1637 | } |
| 1638 | |
| 1639 | diffy = 0; |
| 1640 | if ((constraints.fill != GridBagConstraints.VERTICAL && |
| 1641 | constraints.fill != GridBagConstraints.BOTH) |
| 1642 | && (r.height > (constraints.minHeight + constraints.ipady))) { |
| 1643 | diffy = r.height - (constraints.minHeight + constraints.ipady); |
| 1644 | r.height = constraints.minHeight + constraints.ipady; |
| 1645 | } |
| 1646 | |
| 1647 | switch (constraints.anchor) { |
| 1648 | case GridBagConstraints.BASELINE: |
| 1649 | r.x += diffx/2; |
| 1650 | alignOnBaseline(constraints, r, cellY, cellHeight); |
| 1651 | break; |
| 1652 | case GridBagConstraints.BASELINE_LEADING: |
| 1653 | if (rightToLeft) { |
| 1654 | r.x += diffx; |
| 1655 | } |
| 1656 | alignOnBaseline(constraints, r, cellY, cellHeight); |
| 1657 | break; |
| 1658 | case GridBagConstraints.BASELINE_TRAILING: |
| 1659 | if (!rightToLeft) { |
| 1660 | r.x += diffx; |
| 1661 | } |
| 1662 | alignOnBaseline(constraints, r, cellY, cellHeight); |
| 1663 | break; |
| 1664 | case GridBagConstraints.ABOVE_BASELINE: |
| 1665 | r.x += diffx/2; |
| 1666 | alignAboveBaseline(constraints, r, cellY, cellHeight); |
| 1667 | break; |
| 1668 | case GridBagConstraints.ABOVE_BASELINE_LEADING: |
| 1669 | if (rightToLeft) { |
| 1670 | r.x += diffx; |
| 1671 | } |
| 1672 | alignAboveBaseline(constraints, r, cellY, cellHeight); |
| 1673 | break; |
| 1674 | case GridBagConstraints.ABOVE_BASELINE_TRAILING: |
| 1675 | if (!rightToLeft) { |
| 1676 | r.x += diffx; |
| 1677 | } |
| 1678 | alignAboveBaseline(constraints, r, cellY, cellHeight); |
| 1679 | break; |
| 1680 | case GridBagConstraints.BELOW_BASELINE: |
| 1681 | r.x += diffx/2; |
| 1682 | alignBelowBaseline(constraints, r, cellY, cellHeight); |
| 1683 | break; |
| 1684 | case GridBagConstraints.BELOW_BASELINE_LEADING: |
| 1685 | if (rightToLeft) { |
| 1686 | r.x += diffx; |
| 1687 | } |
| 1688 | alignBelowBaseline(constraints, r, cellY, cellHeight); |
| 1689 | break; |
| 1690 | case GridBagConstraints.BELOW_BASELINE_TRAILING: |
| 1691 | if (!rightToLeft) { |
| 1692 | r.x += diffx; |
| 1693 | } |
| 1694 | alignBelowBaseline(constraints, r, cellY, cellHeight); |
| 1695 | break; |
| 1696 | case GridBagConstraints.CENTER: |
| 1697 | r.x += diffx/2; |
| 1698 | r.y += diffy/2; |
| 1699 | break; |
| 1700 | case GridBagConstraints.PAGE_START: |
| 1701 | case GridBagConstraints.NORTH: |
| 1702 | r.x += diffx/2; |
| 1703 | break; |
| 1704 | case GridBagConstraints.NORTHEAST: |
| 1705 | r.x += diffx; |
| 1706 | break; |
| 1707 | case GridBagConstraints.EAST: |
| 1708 | r.x += diffx; |
| 1709 | r.y += diffy/2; |
| 1710 | break; |
| 1711 | case GridBagConstraints.SOUTHEAST: |
| 1712 | r.x += diffx; |
| 1713 | r.y += diffy; |
| 1714 | break; |
| 1715 | case GridBagConstraints.PAGE_END: |
| 1716 | case GridBagConstraints.SOUTH: |
| 1717 | r.x += diffx/2; |
| 1718 | r.y += diffy; |
| 1719 | break; |
| 1720 | case GridBagConstraints.SOUTHWEST: |
| 1721 | r.y += diffy; |
| 1722 | break; |
| 1723 | case GridBagConstraints.WEST: |
| 1724 | r.y += diffy/2; |
| 1725 | break; |
| 1726 | case GridBagConstraints.NORTHWEST: |
| 1727 | break; |
| 1728 | case GridBagConstraints.LINE_START: |
| 1729 | if (rightToLeft) { |
| 1730 | r.x += diffx; |
| 1731 | } |
| 1732 | r.y += diffy/2; |
| 1733 | break; |
| 1734 | case GridBagConstraints.LINE_END: |
| 1735 | if (!rightToLeft) { |
| 1736 | r.x += diffx; |
| 1737 | } |
| 1738 | r.y += diffy/2; |
| 1739 | break; |
| 1740 | case GridBagConstraints.FIRST_LINE_START: |
| 1741 | if (rightToLeft) { |
| 1742 | r.x += diffx; |
| 1743 | } |
| 1744 | break; |
| 1745 | case GridBagConstraints.FIRST_LINE_END: |
| 1746 | if (!rightToLeft) { |
| 1747 | r.x += diffx; |
| 1748 | } |
| 1749 | break; |
| 1750 | case GridBagConstraints.LAST_LINE_START: |
| 1751 | if (rightToLeft) { |
| 1752 | r.x += diffx; |
| 1753 | } |
| 1754 | r.y += diffy; |
| 1755 | break; |
| 1756 | case GridBagConstraints.LAST_LINE_END: |
| 1757 | if (!rightToLeft) { |
| 1758 | r.x += diffx; |
| 1759 | } |
| 1760 | r.y += diffy; |
| 1761 | break; |
| 1762 | default: |
| 1763 | throw new IllegalArgumentException("illegal anchor value"); |
| 1764 | } |
| 1765 | } |
| 1766 | |
| 1767 | /** |
| 1768 | * Positions on the baseline. |
| 1769 | * |
| 1770 | * @param cellY the location of the row, does not include insets |
| 1771 | * @param cellHeight the height of the row, does not take into account |
| 1772 | * insets |
| 1773 | * @param r available bounds for the component, is padded by insets and |
| 1774 | * ipady |
| 1775 | */ |
| 1776 | private void alignOnBaseline(GridBagConstraints cons, Rectangle r, |
| 1777 | int cellY, int cellHeight) { |
| 1778 | if (cons.ascent >= 0) { |
| 1779 | if (cons.baselineResizeBehavior == Component. |
| 1780 | BaselineResizeBehavior.CONSTANT_DESCENT) { |
| 1781 | // Anchor to the bottom. |
| 1782 | // Baseline is at (cellY + cellHeight - maxDescent). |
| 1783 | // Bottom of component (maxY) is at baseline + descent |
| 1784 | // of component. We need to subtract the bottom inset here |
| 1785 | // as the descent in the constraints object includes the |
| 1786 | // bottom inset. |
| 1787 | int maxY = cellY + cellHeight - |
| 1788 | layoutInfo.maxDescent[cons.tempY + cons.tempHeight - 1] + |
| 1789 | cons.descent - cons.insets.bottom; |
| 1790 | if (!cons.isVerticallyResizable()) { |
| 1791 | // Component not resizable, calculate y location |
| 1792 | // from maxY - height. |
| 1793 | r.y = maxY - cons.minHeight; |
| 1794 | r.height = cons.minHeight; |
| 1795 | } else { |
| 1796 | // Component is resizable. As brb is constant descent, |
| 1797 | // can expand component to fill region above baseline. |
| 1798 | // Subtract out the top inset so that components insets |
| 1799 | // are honored. |
| 1800 | r.height = maxY - cellY - cons.insets.top; |
| 1801 | } |
| 1802 | } |
| 1803 | else { |
| 1804 | // BRB is not constant_descent |
| 1805 | int baseline; // baseline for the row, relative to cellY |
| 1806 | // Component baseline, includes insets.top |
| 1807 | int ascent = cons.ascent; |
| 1808 | if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| 1809 | // Mixed ascent/descent in same row, calculate position |
| 1810 | // off maxDescent |
| 1811 | baseline = cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| 1812 | } |
| 1813 | else { |
| 1814 | // Only ascents/unknown in this row, anchor to top |
| 1815 | baseline = layoutInfo.maxAscent[cons.tempY]; |
| 1816 | } |
| 1817 | if (cons.baselineResizeBehavior == Component. |
| 1818 | BaselineResizeBehavior.OTHER) { |
| 1819 | // BRB is other, which means we can only determine |
| 1820 | // the baseline by asking for it again giving the |
| 1821 | // size we plan on using for the component. |
| 1822 | boolean fits = false; |
| 1823 | ascent = componentAdjusting.getBaseline(r.width, r.height); |
| 1824 | if (ascent >= 0) { |
| 1825 | // Component has a baseline, pad with top inset |
| 1826 | // (this follows from calculateBaseline which |
| 1827 | // does the same). |
| 1828 | ascent += cons.insets.top; |
| 1829 | } |
| 1830 | if (ascent >= 0 && ascent <= baseline) { |
| 1831 | // Components baseline fits within rows baseline. |
| 1832 | // Make sure the descent fits within the space as well. |
| 1833 | if (baseline + (r.height - ascent - cons.insets.top) <= |
| 1834 | cellHeight - cons.insets.bottom) { |
| 1835 | // It fits, we're good. |
| 1836 | fits = true; |
| 1837 | } |
| 1838 | else if (cons.isVerticallyResizable()) { |
| 1839 | // Doesn't fit, but it's resizable. Try |
| 1840 | // again assuming we'll get ascent again. |
| 1841 | int ascent2 = componentAdjusting.getBaseline( |
| 1842 | r.width, cellHeight - cons.insets.bottom - |
| 1843 | baseline + ascent); |
| 1844 | if (ascent2 >= 0) { |
| 1845 | ascent2 += cons.insets.top; |
| 1846 | } |
| 1847 | if (ascent2 >= 0 && ascent2 <= ascent) { |
| 1848 | // It'll fit |
| 1849 | r.height = cellHeight - cons.insets.bottom - |
| 1850 | baseline + ascent; |
| 1851 | ascent = ascent2; |
| 1852 | fits = true; |
| 1853 | } |
| 1854 | } |
| 1855 | } |
| 1856 | if (!fits) { |
| 1857 | // Doesn't fit, use min size and original ascent |
| 1858 | ascent = cons.ascent; |
| 1859 | r.width = cons.minWidth; |
| 1860 | r.height = cons.minHeight; |
| 1861 | } |
| 1862 | } |
| 1863 | // Reset the components y location based on |
| 1864 | // components ascent and baseline for row. Because ascent |
| 1865 | // includes the baseline |
| 1866 | r.y = cellY + baseline - ascent + cons.insets.top; |
| 1867 | if (cons.isVerticallyResizable()) { |
| 1868 | switch(cons.baselineResizeBehavior) { |
| 1869 | case CONSTANT_ASCENT: |
| 1870 | r.height = Math.max(cons.minHeight,cellY + cellHeight - |
| 1871 | r.y - cons.insets.bottom); |
| 1872 | break; |
| 1873 | case CENTER_OFFSET: |
| 1874 | { |
| 1875 | int upper = r.y - cellY - cons.insets.top; |
| 1876 | int lower = cellY + cellHeight - r.y - |
| 1877 | cons.minHeight - cons.insets.bottom; |
| 1878 | int delta = Math.min(upper, lower); |
| 1879 | delta += delta; |
| 1880 | if (delta > 0 && |
| 1881 | (cons.minHeight + cons.centerPadding + |
| 1882 | delta) / 2 + cons.centerOffset != baseline) { |
| 1883 | // Off by 1 |
| 1884 | delta--; |
| 1885 | } |
| 1886 | r.height = cons.minHeight + delta; |
| 1887 | r.y = cellY + baseline - |
| 1888 | (r.height + cons.centerPadding) / 2 - |
| 1889 | cons.centerOffset; |
| 1890 | } |
| 1891 | break; |
| 1892 | case OTHER: |
| 1893 | // Handled above |
| 1894 | break; |
| 1895 | default: |
| 1896 | break; |
| 1897 | } |
| 1898 | } |
| 1899 | } |
| 1900 | } |
| 1901 | else { |
| 1902 | centerVertically(cons, r, cellHeight); |
| 1903 | } |
| 1904 | } |
| 1905 | |
| 1906 | /** |
| 1907 | * Positions the specified component above the baseline. That is |
| 1908 | * the bottom edge of the component will be aligned along the baseline. |
| 1909 | * If the row does not have a baseline, this centers the component. |
| 1910 | */ |
| 1911 | private void alignAboveBaseline(GridBagConstraints cons, Rectangle r, |
| 1912 | int cellY, int cellHeight) { |
| 1913 | if (layoutInfo.hasBaseline(cons.tempY)) { |
| 1914 | int maxY; // Baseline for the row |
| 1915 | if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| 1916 | // Prefer descent |
| 1917 | maxY = cellY + cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| 1918 | } |
| 1919 | else { |
| 1920 | // Prefer ascent |
| 1921 | maxY = cellY + layoutInfo.maxAscent[cons.tempY]; |
| 1922 | } |
| 1923 | if (cons.isVerticallyResizable()) { |
| 1924 | // Component is resizable. Top edge is offset by top |
| 1925 | // inset, bottom edge on baseline. |
| 1926 | r.y = cellY + cons.insets.top; |
| 1927 | r.height = maxY - r.y; |
| 1928 | } |
| 1929 | else { |
| 1930 | // Not resizable. |
| 1931 | r.height = cons.minHeight + cons.ipady; |
| 1932 | r.y = maxY - r.height; |
| 1933 | } |
| 1934 | } |
| 1935 | else { |
| 1936 | centerVertically(cons, r, cellHeight); |
| 1937 | } |
| 1938 | } |
| 1939 | |
| 1940 | /** |
| 1941 | * Positions below the baseline. |
| 1942 | */ |
| 1943 | private void alignBelowBaseline(GridBagConstraints cons, Rectangle r, |
| 1944 | int cellY, int cellHeight) { |
| 1945 | if (layoutInfo.hasBaseline(cons.tempY)) { |
| 1946 | if (layoutInfo.hasConstantDescent(cons.tempY)) { |
| 1947 | // Prefer descent |
| 1948 | r.y = cellY + cellHeight - layoutInfo.maxDescent[cons.tempY]; |
| 1949 | } |
| 1950 | else { |
| 1951 | // Prefer ascent |
| 1952 | r.y = cellY + layoutInfo.maxAscent[cons.tempY]; |
| 1953 | } |
| 1954 | if (cons.isVerticallyResizable()) { |
| 1955 | r.height = cellY + cellHeight - r.y - cons.insets.bottom; |
| 1956 | } |
| 1957 | } |
| 1958 | else { |
| 1959 | centerVertically(cons, r, cellHeight); |
| 1960 | } |
| 1961 | } |
| 1962 | |
| 1963 | private void centerVertically(GridBagConstraints cons, Rectangle r, |
| 1964 | int cellHeight) { |
| 1965 | if (!cons.isVerticallyResizable()) { |
| 1966 | r.y += Math.max(0, (cellHeight - cons.insets.top - |
| 1967 | cons.insets.bottom - cons.minHeight - |
| 1968 | cons.ipady) / 2); |
| 1969 | } |
| 1970 | } |
| 1971 | |
| 1972 | /** |
| 1973 | * Figures out the minimum size of the |
| 1974 | * master based on the information from <code>getLayoutInfo</code>. |
| 1975 | * This method should only be used internally by |
| 1976 | * <code>GridBagLayout</code>. |
| 1977 | * |
| 1978 | * @param parent the layout container |
| 1979 | * @param info the layout info for this parent |
| 1980 | * @return a <code>Dimension</code> object containing the |
| 1981 | * minimum size |
| 1982 | * @since 1.4 |
| 1983 | */ |
| 1984 | protected Dimension getMinSize(Container parent, GridBagLayoutInfo info) { |
| 1985 | return GetMinSize(parent, info); |
| 1986 | } |
| 1987 | |
| 1988 | /** |
| 1989 | * This method is obsolete and supplied for backwards |
| 1990 | * compatability only; new code should call {@link |
| 1991 | * #getMinSize(java.awt.Container, GridBagLayoutInfo) getMinSize} instead. |
| 1992 | * This method is the same as <code>getMinSize</code>; |
| 1993 | * refer to <code>getMinSize</code> for details on parameters |
| 1994 | * and return value. |
| 1995 | */ |
| 1996 | protected Dimension GetMinSize(Container parent, GridBagLayoutInfo info) { |
| 1997 | Dimension d = new Dimension(); |
| 1998 | int i, t; |
| 1999 | Insets insets = parent.getInsets(); |
| 2000 | |
| 2001 | t = 0; |
| 2002 | for(i = 0; i < info.width; i++) |
| 2003 | t += info.minWidth[i]; |
| 2004 | d.width = t + insets.left + insets.right; |
| 2005 | |
| 2006 | t = 0; |
| 2007 | for(i = 0; i < info.height; i++) |
| 2008 | t += info.minHeight[i]; |
| 2009 | d.height = t + insets.top + insets.bottom; |
| 2010 | |
| 2011 | return d; |
| 2012 | } |
| 2013 | |
| 2014 | transient boolean rightToLeft = false; |
| 2015 | |
| 2016 | /** |
| 2017 | * Lays out the grid. |
| 2018 | * This method should only be used internally by |
| 2019 | * <code>GridBagLayout</code>. |
| 2020 | * |
| 2021 | * @param parent the layout container |
| 2022 | * @since 1.4 |
| 2023 | */ |
| 2024 | protected void arrangeGrid(Container parent) { |
| 2025 | ArrangeGrid(parent); |
| 2026 | } |
| 2027 | |
| 2028 | /** |
| 2029 | * This method is obsolete and supplied for backwards |
| 2030 | * compatability only; new code should call {@link |
| 2031 | * #arrangeGrid(Container) arrangeGrid} instead. |
| 2032 | * This method is the same as <code>arrangeGrid</code>; |
| 2033 | * refer to <code>arrangeGrid</code> for details on the |
| 2034 | * parameter. |
| 2035 | */ |
| 2036 | protected void ArrangeGrid(Container parent) { |
| 2037 | Component comp; |
| 2038 | int compindex; |
| 2039 | GridBagConstraints constraints; |
| 2040 | Insets insets = parent.getInsets(); |
| 2041 | Component components[] = parent.getComponents(); |
| 2042 | Dimension d; |
| 2043 | Rectangle r = new Rectangle(); |
| 2044 | int i, diffw, diffh; |
| 2045 | double weight; |
| 2046 | GridBagLayoutInfo info; |
| 2047 | |
| 2048 | rightToLeft = !parent.getComponentOrientation().isLeftToRight(); |
| 2049 | |
| 2050 | /* |
| 2051 | * If the parent has no slaves anymore, then don't do anything |
| 2052 | * at all: just leave the parent's size as-is. |
| 2053 | */ |
| 2054 | if (components.length == 0 && |
| 2055 | (columnWidths == null || columnWidths.length == 0) && |
| 2056 | (rowHeights == null || rowHeights.length == 0)) { |
| 2057 | return; |
| 2058 | } |
| 2059 | |
| 2060 | /* |
| 2061 | * Pass #1: scan all the slaves to figure out the total amount |
| 2062 | * of space needed. |
| 2063 | */ |
| 2064 | |
| 2065 | info = getLayoutInfo(parent, PREFERREDSIZE); |
| 2066 | d = getMinSize(parent, info); |
| 2067 | |
| 2068 | if (parent.width < d.width || parent.height < d.height) { |
| 2069 | info = getLayoutInfo(parent, MINSIZE); |
| 2070 | d = getMinSize(parent, info); |
| 2071 | } |
| 2072 | |
| 2073 | layoutInfo = info; |
| 2074 | r.width = d.width; |
| 2075 | r.height = d.height; |
| 2076 | |
| 2077 | /* |
| 2078 | * DEBUG |
| 2079 | * |
| 2080 | * DumpLayoutInfo(info); |
| 2081 | * for (compindex = 0 ; compindex < components.length ; compindex++) { |
| 2082 | * comp = components[compindex]; |
| 2083 | * if (!comp.isVisible()) |
| 2084 | * continue; |
| 2085 | * constraints = lookupConstraints(comp); |
| 2086 | * DumpConstraints(constraints); |
| 2087 | * } |
| 2088 | * System.out.println("minSize " + r.width + " " + r.height); |
| 2089 | */ |
| 2090 | |
| 2091 | /* |
| 2092 | * If the current dimensions of the window don't match the desired |
| 2093 | * dimensions, then adjust the minWidth and minHeight arrays |
| 2094 | * according to the weights. |
| 2095 | */ |
| 2096 | |
| 2097 | diffw = parent.width - r.width; |
| 2098 | if (diffw != 0) { |
| 2099 | weight = 0.0; |
| 2100 | for (i = 0; i < info.width; i++) |
| 2101 | weight += info.weightX[i]; |
| 2102 | if (weight > 0.0) { |
| 2103 | for (i = 0; i < info.width; i++) { |
| 2104 | int dx = (int)(( ((double)diffw) * info.weightX[i]) / weight); |
| 2105 | info.minWidth[i] += dx; |
| 2106 | r.width += dx; |
| 2107 | if (info.minWidth[i] < 0) { |
| 2108 | r.width -= info.minWidth[i]; |
| 2109 | info.minWidth[i] = 0; |
| 2110 | } |
| 2111 | } |
| 2112 | } |
| 2113 | diffw = parent.width - r.width; |
| 2114 | } |
| 2115 | |
| 2116 | else { |
| 2117 | diffw = 0; |
| 2118 | } |
| 2119 | |
| 2120 | diffh = parent.height - r.height; |
| 2121 | if (diffh != 0) { |
| 2122 | weight = 0.0; |
| 2123 | for (i = 0; i < info.height; i++) |
| 2124 | weight += info.weightY[i]; |
| 2125 | if (weight > 0.0) { |
| 2126 | for (i = 0; i < info.height; i++) { |
| 2127 | int dy = (int)(( ((double)diffh) * info.weightY[i]) / weight); |
| 2128 | info.minHeight[i] += dy; |
| 2129 | r.height += dy; |
| 2130 | if (info.minHeight[i] < 0) { |
| 2131 | r.height -= info.minHeight[i]; |
| 2132 | info.minHeight[i] = 0; |
| 2133 | } |
| 2134 | } |
| 2135 | } |
| 2136 | diffh = parent.height - r.height; |
| 2137 | } |
| 2138 | |
| 2139 | else { |
| 2140 | diffh = 0; |
| 2141 | } |
| 2142 | |
| 2143 | /* |
| 2144 | * DEBUG |
| 2145 | * |
| 2146 | * System.out.println("Re-adjusted:"); |
| 2147 | * DumpLayoutInfo(info); |
| 2148 | */ |
| 2149 | |
| 2150 | /* |
| 2151 | * Now do the actual layout of the slaves using the layout information |
| 2152 | * that has been collected. |
| 2153 | */ |
| 2154 | |
| 2155 | info.startx = diffw/2 + insets.left; |
| 2156 | info.starty = diffh/2 + insets.top; |
| 2157 | |
| 2158 | for (compindex = 0 ; compindex < components.length ; compindex++) { |
| 2159 | comp = components[compindex]; |
| 2160 | if (!comp.isVisible()){ |
| 2161 | continue; |
| 2162 | } |
| 2163 | constraints = lookupConstraints(comp); |
| 2164 | |
| 2165 | if (!rightToLeft) { |
| 2166 | r.x = info.startx; |
| 2167 | for(i = 0; i < constraints.tempX; i++) |
| 2168 | r.x += info.minWidth[i]; |
| 2169 | } else { |
| 2170 | r.x = parent.width - (diffw/2 + insets.right); |
| 2171 | for(i = 0; i < constraints.tempX; i++) |
| 2172 | r.x -= info.minWidth[i]; |
| 2173 | } |
| 2174 | |
| 2175 | r.y = info.starty; |
| 2176 | for(i = 0; i < constraints.tempY; i++) |
| 2177 | r.y += info.minHeight[i]; |
| 2178 | |
| 2179 | r.width = 0; |
| 2180 | for(i = constraints.tempX; |
| 2181 | i < (constraints.tempX + constraints.tempWidth); |
| 2182 | i++) { |
| 2183 | r.width += info.minWidth[i]; |
| 2184 | } |
| 2185 | |
| 2186 | r.height = 0; |
| 2187 | for(i = constraints.tempY; |
| 2188 | i < (constraints.tempY + constraints.tempHeight); |
| 2189 | i++) { |
| 2190 | r.height += info.minHeight[i]; |
| 2191 | } |
| 2192 | |
| 2193 | componentAdjusting = comp; |
| 2194 | adjustForGravity(constraints, r); |
| 2195 | |
| 2196 | /* fix for 4408108 - components were being created outside of the container */ |
| 2197 | /* fix for 4969409 "-" replaced by "+" */ |
| 2198 | if (r.x < 0) { |
| 2199 | r.width += r.x; |
| 2200 | r.x = 0; |
| 2201 | } |
| 2202 | |
| 2203 | if (r.y < 0) { |
| 2204 | r.height += r.y; |
| 2205 | r.y = 0; |
| 2206 | } |
| 2207 | |
| 2208 | /* |
| 2209 | * If the window is too small to be interesting then |
| 2210 | * unmap it. Otherwise configure it and then make sure |
| 2211 | * it's mapped. |
| 2212 | */ |
| 2213 | |
| 2214 | if ((r.width <= 0) || (r.height <= 0)) { |
| 2215 | comp.setBounds(0, 0, 0, 0); |
| 2216 | } |
| 2217 | else { |
| 2218 | if (comp.x != r.x || comp.y != r.y || |
| 2219 | comp.width != r.width || comp.height != r.height) { |
| 2220 | comp.setBounds(r.x, r.y, r.width, r.height); |
| 2221 | } |
| 2222 | } |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | // Added for serial backwards compatability (4348425) |
| 2227 | static final long serialVersionUID = 8838754796412211005L; |
| 2228 | } |