| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 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 | |
| 26 | package java.awt; |
| 27 | |
| 28 | /** |
| 29 | * The {@code GridBagLayoutInfo} is an utility class for |
| 30 | * {@code GridBagLayout} layout manager. |
| 31 | * It stores align, size and baseline parameters for every component within a container. |
| 32 | * <p> |
| 33 | * @see java.awt.GridBagLayout |
| 34 | * @see java.awt.GridBagConstraints |
| 35 | * @since 1.6 |
| 36 | */ |
| 37 | public class GridBagLayoutInfo implements java.io.Serializable { |
| 38 | /* |
| 39 | * serialVersionUID |
| 40 | */ |
| 41 | private static final long serialVersionUID = -4899416460737170217L; |
| 42 | |
| 43 | int width, height; /* number of cells: horizontal and vertical */ |
| 44 | int startx, starty; /* starting point for layout */ |
| 45 | int minWidth[]; /* largest minWidth in each column */ |
| 46 | int minHeight[]; /* largest minHeight in each row */ |
| 47 | double weightX[]; /* largest weight in each column */ |
| 48 | double weightY[]; /* largest weight in each row */ |
| 49 | boolean hasBaseline; /* Whether or not baseline layout has been |
| 50 | * requested and one of the components |
| 51 | * has a valid baseline. */ |
| 52 | // These are only valid if hasBaseline is true and are indexed by |
| 53 | // row. |
| 54 | short baselineType[]; /* The type of baseline for a particular |
| 55 | * row. A mix of the BaselineResizeBehavior |
| 56 | * constants (1 << ordinal()) */ |
| 57 | int maxAscent[]; /* Max ascent (baseline). */ |
| 58 | int maxDescent[]; /* Max descent (height - baseline) */ |
| 59 | |
| 60 | /** |
| 61 | * Creates an instance of GridBagLayoutInfo representing {@code GridBagLayout} |
| 62 | * grid cells with it's own parameters. |
| 63 | * @param width the columns |
| 64 | * @param height the rows |
| 65 | * @since 6.0 |
| 66 | */ |
| 67 | GridBagLayoutInfo(int width, int height) { |
| 68 | this.width = width; |
| 69 | this.height = height; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Returns true if the specified row has any component aligned on the |
| 74 | * baseline with a baseline resize behavior of CONSTANT_DESCENT. |
| 75 | */ |
| 76 | boolean hasConstantDescent(int row) { |
| 77 | return ((baselineType[row] & (1 << Component.BaselineResizeBehavior. |
| 78 | CONSTANT_DESCENT.ordinal())) != 0); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Returns true if there is a baseline for the specified row. |
| 83 | */ |
| 84 | boolean hasBaseline(int row) { |
| 85 | return (hasBaseline && baselineType[row] != 0); |
| 86 | } |
| 87 | } |