/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -------------------
* G2TextMeasurer.java
* -------------------
* (C) Copyright 2004, 2005, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: G2TextMeasurer.java,v 1.4 2005/10/18 13:17:16 mungady Exp $
*
* Changes
* -------
* 07-Jan-2004 : Version 1 (DG);
*
*/
package org.jfree.text;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
/**
* A {@link TextMeasurer} based on a {@link Graphics2D}.
*
* @author David Gilbert
*/
public class G2TextMeasurer implements TextMeasurer {
/** The graphics device. */
private Graphics2D g2;
/**
* Creates a new text measurer.
*
* @param g2 the graphics device.
*/
public G2TextMeasurer(final Graphics2D g2) {
this.g2 = g2;
}
/**
* Returns the string width.
*
* @param text the text.
* @param start the index of the first character to measure.
* @param end the index of the last character to measure.
*
* @return The string width.
*/
public float getStringWidth(final String text,
final int start, final int end) {
final FontMetrics fm = this.g2.getFontMetrics();
final Rectangle2D bounds = TextUtilities.getTextBounds(
text.substring(start, end), this.g2, fm
);
final float result = (float) bounds.getWidth();
return result;
}
}