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/* OverUnderBox.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.awt.geom.AffineTransform;
/**
* A box representing another box with a delimiter box and a script box above or under it,
* with script and delimiter seperated by a kern.
*/
class OverUnderBox extends Box {
// base, delimiter and script atom
private final Box base;
private final Box del;
private final Box script;
// kern amount between the delimiter and the script
private final float kern;
// whether the delimiter should be drawn over (<-> under) the base atom
private final boolean over;
/**
* the parameter boxes must have an equal width!!
*
* @param b
* base box to be drawn on the baseline
* @param d
* delimiter box
* @param script
* subscript or superscript box
* @param over
* true : draws delimiter and script box above the base box, false : under the
* base box
*/
public OverUnderBox(Box b, Box d, Box script, float kern, boolean over) {
base = b;
del = d;
this.script = script;
this.kern = kern;
this.over = over;
// calculate metrics of the box
width = b.getWidth();
height = b.height
+ (over ? d.getWidth() : 0)
+ (over && script != null ? script.height + script.depth + kern : 0);
depth = b.depth
+ (over ? 0 : d.getWidth())
+ (!over && script == null ? 0 : script.height + script.depth + kern);
}
public void draw(Graphics2D g2, float x, float y) {
base.draw(g2, x, y);
float yVar = y - base.height;
if (over) { // draw delimiter and script above base box
double transX = x + del.getWidth() / 2, transY = yVar - del.getWidth()
/ 2;
AffineTransform oldAt = g2.getTransform();
g2.translate(transX, transY);
g2.rotate(Math.PI / 2);
del.draw(g2, -del.getWidth() / 2, -del.depth + del.getWidth() / 2);
g2.setTransform(oldAt);
yVar -= del.getWidth();
// draw superscript
if (script != null)
script.draw(g2, x, yVar - kern - script.depth);
}
yVar = y + base.depth;
if (!over) { // draw delimiter and script under base box
yVar += del.getWidth();
double transX = x + del.getWidth() / 2, transY = yVar - del.getWidth()
/ 2;
AffineTransform oldAt = g2.getTransform();
g2.translate(transX, transY);
g2.rotate(Math.PI / 2);
del.draw(g2, -del.getWidth() / 2, -del.depth + del.getWidth() / 2);
g2.setTransform(oldAt);
// draw subscript
if (script != null)
script.draw(g2, x, yVar + kern + script.height);
}
}
public int getLastFontId() {
return base.getLastFontId();
}
}
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