001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 006 * 007 * Project Info: http://www.jfree.org/jfreechart/index.html 008 * 009 * This library is free software; you can redistribute it and/or modify it 010 * under the terms of the GNU Lesser General Public License as published by 011 * the Free Software Foundation; either version 2.1 of the License, or 012 * (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but 015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 017 * License for more details. 018 * 019 * You should have received a copy of the GNU Lesser General Public 020 * License along with this library; if not, write to the Free Software 021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 022 * USA. 023 * 024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 025 * in the United States and other countries.] 026 * 027 * ------------------------- 028 * ContourPlotUtilities.java 029 * ------------------------- 030 * (C) Copyright 2002-2004, by David M. O'Donnell and Contributors. 031 * 032 * Original Author: David M. O'Donnell; 033 * Contributor(s): David Gilbert (for Object Refinery Limited); 034 * 035 * $Id: ContourPlotUtilities.java,v 1.2.2.1 2005/10/25 20:52:08 mungady Exp $ 036 * 037 * Changes 038 * ------- 039 * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG); 040 * 22-Jul-2003 : Made this class abstract as there is no need to instantiate 041 * it (DG); 042 * 043 */ 044 045 package org.jfree.chart.plot; 046 047 import org.jfree.data.Range; 048 import org.jfree.data.contour.ContourDataset; 049 import org.jfree.data.contour.DefaultContourDataset; 050 051 /** 052 * Some utility methods for the {@link ContourPlot} class. 053 * 054 * @author David M. O'Donnell 055 */ 056 public abstract class ContourPlotUtilities { 057 058 /** 059 * Returns the visible z-range. 060 * 061 * @param data the dataset. 062 * @param x the x range. 063 * @param y the y range. 064 * 065 * @return The range. 066 */ 067 public static Range visibleRange(ContourDataset data, Range x, Range y) { 068 Range range = null; 069 range = ((DefaultContourDataset) data).getZValueRange(x, y); 070 return range; 071 } 072 073 }