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* =========================================================================
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* This file is part of the JMathTeX Library - http://jmathtex.sourceforge.net
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* Copyright (C) 2004-2007 Universiteit Gent
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* A copy of the GNU General Public License can be found in the file
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* LICENSE.txt provided with the source distribution of this program (see
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* the META-INF directory in the source jar). This license can also be
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* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
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* If you did not receive a copy of the GNU General Public License along
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* with this program, contact the lead developer, or write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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package be.ugent.caagt.jmathtex;
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import java.awt.Graphics2D;
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import java.util.ListIterator;
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* A box composed of other boxes, put one above the other.
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class VerticalBox extends Box {
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private float leftMostPos = Float.MAX_VALUE;
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private float rightMostPos = Float.MIN_VALUE; // NOPMD
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public VerticalBox() {
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public VerticalBox(Box b, float rest, int alignment) {
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if (alignment == TeXConstants.ALIGN_CENTER) {
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StrutBox s = new StrutBox(0, rest / 2, 0, 0);
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} else if (alignment == TeXConstants.ALIGN_TOP) {
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super.add(new StrutBox(0, rest, 0, 0));
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} else if (alignment == TeXConstants.ALIGN_BOTTOM) {
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super.add(0, new StrutBox(0, rest, 0, 0));
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public final void add(Box b) {
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if (children.size() == 1) {
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depth += b.height + b.depth;
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private void recalculateWidth(Box b) {
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leftMostPos = Math.min(leftMostPos, b.shift);
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rightMostPos = Math.max(rightMostPos, b.shift
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+ (b.width > 0 ? b.width : 0));
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width = rightMostPos - leftMostPos;
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public void add(int pos, Box b) {
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depth += b.depth + height;
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depth += b.height + b.depth;
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public void draw(Graphics2D g2, float x, float y) {
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float yPos = y - height;
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for (Box b : children) {
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yPos += b.getHeight();
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b.draw(g2, x + b.getShift() - leftMostPos, yPos);
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public int getSize() {
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return children.size();
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public int getLastFontId() {
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// iterate from the last child box (the lowest) to the first (the highest)
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// untill a font id is found that's not equal to NO_FONT
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int fontId = TeXFont.NO_FONT;
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for (ListIterator it = children.listIterator(children.size()); fontId == TeXFont.NO_FONT
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&& it.hasPrevious();)
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fontId = ((Box) it.previous()).getLastFontId();