JDK8/Java8源码在线阅读

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

package java.awt;

/**
 * The {@code GridBagLayoutInfo} is an utility class for
 * {@code GridBagLayout} layout manager.
 * It stores align, size and baseline parameters for every component within a container.
 * <p>
 * @see       java.awt.GridBagLayout
 * @see       java.awt.GridBagConstraints
 * @since 1.6
 */
public class GridBagLayoutInfo implements java.io.Serializable {
    /*
     * serialVersionUID
     */
    private static final long serialVersionUID = -4899416460737170217L;

    int width, height;          /* number of  cells: horizontal and vertical */
    int startx, starty;         /* starting point for layout */
    int minWidth[];             /* largest minWidth in each column */
    int minHeight[];            /* largest minHeight in each row */
    double weightX[];           /* largest weight in each column */
    double weightY[];           /* largest weight in each row */
    boolean hasBaseline;        /* Whether or not baseline layout has been
                                 * requested and one of the components
                                 * has a valid baseline. */
    // These are only valid if hasBaseline is true and are indexed by
    // row.
    short baselineType[];       /* The type of baseline for a particular
                                 * row.  A mix of the BaselineResizeBehavior
                                 * constants (1 << ordinal()) */
    int maxAscent[];            /* Max ascent (baseline). */
    int maxDescent[];           /* Max descent (height - baseline) */

    /**
     * Creates an instance of GridBagLayoutInfo representing {@code GridBagLayout}
     * grid cells with it's own parameters.
     * @param width the columns
     * @param height the rows
     * @since 6.0
     */
    GridBagLayoutInfo(int width, int height) {
        this.width = width;
        this.height = height;
    }

    /**
     * Returns true if the specified row has any component aligned on the
     * baseline with a baseline resize behavior of CONSTANT_DESCENT.
     */

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