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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------- 28: * G2TextMeasurer.java 29: * ------------------- 30: * (C) Copyright 2004, 2005, by Object Refinery Limited and Contributors. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * $Id: G2TextMeasurer.java,v 1.4 2005/10/18 13:17:16 mungady Exp $ 36: * 37: * Changes 38: * ------- 39: * 07-Jan-2004 : Version 1 (DG); 40: * 41: */ 42: 43: package org.jfree.text; 44: 45: import java.awt.FontMetrics; 46: import java.awt.Graphics2D; 47: import java.awt.geom.Rectangle2D; 48: 49: /** 50: * A {@link TextMeasurer} based on a {@link Graphics2D}. 51: * 52: * @author David Gilbert 53: */ 54: public class G2TextMeasurer implements TextMeasurer { 55: 56: /** The graphics device. */ 57: private Graphics2D g2; 58: 59: /** 60: * Creates a new text measurer. 61: * 62: * @param g2 the graphics device. 63: */ 64: public G2TextMeasurer(final Graphics2D g2) { 65: this.g2 = g2; 66: } 67: 68: /** 69: * Returns the string width. 70: * 71: * @param text the text. 72: * @param start the index of the first character to measure. 73: * @param end the index of the last character to measure. 74: * 75: * @return The string width. 76: */ 77: public float getStringWidth(final String text, 78: final int start, final int end) { 79: final FontMetrics fm = this.g2.getFontMetrics(); 80: final Rectangle2D bounds = TextUtilities.getTextBounds( 81: text.substring(start, end), this.g2, fm 82: ); 83: final float result = (float) bounds.getWidth(); 84: return result; 85: } 86: 87: }