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| 1 | /* | ||
| 2 | * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.awt; | ||
| 27 | |||
| 28 | /** | ||
| 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 | } | ||