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/* HorizontalBox.java
* =========================================================================
* This file is part of the JMathTeX Library - http://jmathtex.sourceforge.net
*
* Copyright (C) 2004-2007 Universiteit Gent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program 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 for more details.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*/
package be.ugent.caagt.jmathtex;
import java.awt.Color;
import java.awt.Graphics2D;
import java.util.ListIterator;
/**
* A box composed of a horizontal row of child boxes.
*/
class HorizontalBox extends Box {
private float curPos = 0; // NOPMD
public HorizontalBox(Box b, float w, int alignment) {
float rest = w - b.getWidth();
if (alignment == TeXConstants.ALIGN_CENTER) {
StrutBox s = new StrutBox(rest / 2, 0, 0, 0);
add(s);
add(b);
add(s);
} else if (alignment == TeXConstants.ALIGN_LEFT) {
add(b);
add(new StrutBox(rest, 0, 0, 0));
} else if (alignment == TeXConstants.ALIGN_RIGHT) {
add(new StrutBox(rest, 0, 0, 0));
add(b);
}
}
public HorizontalBox(Box b) {
add(b);
}
public HorizontalBox() {
// basic horizontal box
}
public HorizontalBox(Color fg, Color bg) {
super(fg, bg);
}
public void draw(Graphics2D g2, float x, float y) {
startDraw(g2, x, y);
float xPos = x;
for (Box box: children) {
box.draw(g2, xPos, y + box.shift);
xPos += box.getWidth();
}
endDraw(g2);
}
public final void add(Box b) {
recalculate(b);
super.add(b);
}
private void recalculate(Box b) {
curPos += b.getWidth();
width = Math.max(width, curPos);
height = Math.max((children.size() == 0 ? Float.NEGATIVE_INFINITY
: height), b.height - b.shift);
depth = Math.max(
(children.size() == 0 ? Float.NEGATIVE_INFINITY : depth), b.depth
+ b.shift);
}
public int getLastFontId() {
// iterate from the last child box to the first untill a font id is found
// that's not equal to NO_FONT
int fontId = TeXFont.NO_FONT;
for (ListIterator it = children.listIterator(children.size()); fontId == TeXFont.NO_FONT
&& it.hasPrevious();)
fontId = ((Box) it.previous()).getLastFontId();
return fontId;
}
}
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