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/* VerticalBox.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.Graphics2D;
import java.util.ListIterator;
/**
* A box composed of other boxes, put one above the other.
*/
class VerticalBox extends Box {
private float leftMostPos = Float.MAX_VALUE;
private float rightMostPos = Float.MIN_VALUE; // NOPMD
public VerticalBox() {
// empty
}
public VerticalBox(Box b, float rest, int alignment) {
this();
add(b);
if (alignment == TeXConstants.ALIGN_CENTER) {
StrutBox s = new StrutBox(0, rest / 2, 0, 0);
super.add(0, s);
height += rest / 2;
depth += rest / 2;
super.add(s);
} else if (alignment == TeXConstants.ALIGN_TOP) {
depth += rest;
super.add(new StrutBox(0, rest, 0, 0));
} else if (alignment == TeXConstants.ALIGN_BOTTOM) {
height += rest;
super.add(0, new StrutBox(0, rest, 0, 0));
}
}
public final void add(Box b) {
super.add(b);
if (children.size() == 1) {
height = b.height;
depth = b.depth;
} else
depth += b.height + b.depth;
recalculateWidth(b);
}
private void recalculateWidth(Box b) {
leftMostPos = Math.min(leftMostPos, b.shift);
rightMostPos = Math.max(rightMostPos, b.shift
+ (b.width > 0 ? b.width : 0));
width = rightMostPos - leftMostPos;
}
public void add(int pos, Box b) {
super.add(pos, b);
if (pos == 0) {
depth += b.depth + height;
height = b.height;
} else
depth += b.height + b.depth;
recalculateWidth(b);
}
public void draw(Graphics2D g2, float x, float y) {
float yPos = y - height;
for (Box b : children) {
yPos += b.getHeight();
b.draw(g2, x + b.getShift() - leftMostPos, yPos);
yPos += b.getDepth();
}
}
public int getSize() {
return children.size();
}
public int getLastFontId() {
// iterate from the last child box (the lowest) to the first (the highest)
// 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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