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88 lines
3.5 KiB
Java
88 lines
3.5 KiB
Java
/*
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* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.awt;
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/**
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* The {@code GridBagLayoutInfo} is an utility class for
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* {@code GridBagLayout} layout manager.
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* It stores align, size and baseline parameters for every component within a container.
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*
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* @see java.awt.GridBagLayout
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* @see java.awt.GridBagConstraints
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* @since 1.6
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*/
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public class GridBagLayoutInfo implements java.io.Serializable {
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/*
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* serialVersionUID
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*/
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private static final long serialVersionUID = -4899416460737170217L;
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int width, height; /* number of cells: horizontal and vertical */
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int startx, starty; /* starting point for layout */
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int minWidth[]; /* largest minWidth in each column */
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int minHeight[]; /* largest minHeight in each row */
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double weightX[]; /* largest weight in each column */
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double weightY[]; /* largest weight in each row */
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boolean hasBaseline; /* Whether or not baseline layout has been
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* requested and one of the components
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* has a valid baseline. */
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// These are only valid if hasBaseline is true and are indexed by
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// row.
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short baselineType[]; /* The type of baseline for a particular
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* row. A mix of the BaselineResizeBehavior
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* constants (1 << ordinal()) */
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int maxAscent[]; /* Max ascent (baseline). */
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int maxDescent[]; /* Max descent (height - baseline) */
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/**
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* Creates an instance of GridBagLayoutInfo representing {@code GridBagLayout}
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* grid cells with it's own parameters.
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* @param width the columns
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* @param height the rows
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* @since 1.6
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*/
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GridBagLayoutInfo(int width, int height) {
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this.width = width;
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this.height = height;
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}
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/**
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* Returns true if the specified row has any component aligned on the
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* baseline with a baseline resize behavior of CONSTANT_DESCENT.
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*/
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boolean hasConstantDescent(int row) {
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return ((baselineType[row] & (1 << Component.BaselineResizeBehavior.
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CONSTANT_DESCENT.ordinal())) != 0);
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}
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/**
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* Returns true if there is a baseline for the specified row.
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*/
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boolean hasBaseline(int row) {
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return (hasBaseline && baselineType[row] != 0);
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}
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}
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