/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <http://www.opensourcephysics.org/>
*/
package org.opensourcephysics.display;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
/**
* A BoundedTextLine is a line of text that can be rotated and scaled using a mouse.
*
* @author W. Christian
* @version 1.0
*/
public class BoundedTextLine extends BoundedImage {
Font defaultFont = new Font("Dialog", Font.BOLD, 12); //$NON-NLS-1$
TextLine textLine;
int desent = 0;
int gutter = 6; // gutter is needed for superscripts and subscripts
/**
* Constructor BoundedTextLine
* @param text
* @param x
* @param y
*/
public BoundedTextLine(String text, double x, double y) {
super(new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB), x, y);
textLine = new TextLine(text);
textLine.setFont(defaultFont);
color = Color.BLACK;
}
/**
* Sets the font text font.
*
* @param font Font
*/
public void setFont(Font font) {
textLine.setFont(font);
}
/**
* Gets the font.
*
* @return Font
*/
public Font getFont() {
return textLine.getFont();
}
void checkImageSize(DrawingPanel panel, Graphics g) {
Font oldFont = g.getFont();
Rectangle2D rect = oldFont.getStringBounds(textLine.text, ((Graphics2D) g).getFontRenderContext());
gutter = (int) rect.getHeight()/2; // gutter for superscript and subscripts
if((image.getWidth(null)!=(int) rect.getWidth()+1)||(image.getHeight(null)!=(int) rect.getHeight()+1+gutter)) {
image = new BufferedImage((int) rect.getWidth()+1, (int) rect.getHeight()+1+gutter, BufferedImage.TYPE_INT_ARGB);
width = image.getWidth(null);
height = image.getHeight(null);
desent = -(int) rect.getY();
}
g.setFont(oldFont);
}
/**
* Draws the image.
*
* @param panel the world in which the arrow is viewed
* @param g the graphics context upon which to draw
*/
public void draw(DrawingPanel panel, Graphics g) {
checkImageSize(panel, g);
Graphics ig = image.getGraphics();
textLine.setColor(color);
textLine.drawText(ig, 0, desent+gutter/2);
ig.dispose();
Composite composite = ((Graphics2D) g).getComposite();
((Graphics2D) g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP));
super.draw(panel, g);
((Graphics2D) g).setComposite(composite);
}
}
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software 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.
*
* You should have received a copy of the GNU General Public License
* along with this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/