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1: /* =========================================================== 2: * JFreeChart : a free chart 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/jfreechart/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: * ContourPlotUtilities.java 29: * ------------------------- 30: * (C) Copyright 2002-2004, by David M. O'Donnell and Contributors. 31: * 32: * Original Author: David M. O'Donnell; 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * $Id: ContourPlotUtilities.java,v 1.2.2.1 2005/10/25 20:52:08 mungady Exp $ 36: * 37: * Changes 38: * ------- 39: * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG); 40: * 22-Jul-2003 : Made this class abstract as there is no need to instantiate 41: * it (DG); 42: * 43: */ 44: 45: package org.jfree.chart.plot; 46: 47: import org.jfree.data.Range; 48: import org.jfree.data.contour.ContourDataset; 49: import org.jfree.data.contour.DefaultContourDataset; 50: 51: /** 52: * Some utility methods for the {@link ContourPlot} class. 53: * 54: * @author David M. O'Donnell 55: */ 56: public abstract class ContourPlotUtilities { 57: 58: /** 59: * Returns the visible z-range. 60: * 61: * @param data the dataset. 62: * @param x the x range. 63: * @param y the y range. 64: * 65: * @return The range. 66: */ 67: public static Range visibleRange(ContourDataset data, Range x, Range y) { 68: Range range = null; 69: range = ((DefaultContourDataset) data).getZValueRange(x, y); 70: return range; 71: } 72: 73: }