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Java > Open Source Codes > org > jfree > chart > plot > ContourPlotUtilities


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 License
20  * along with this library; if not, write to the Free Software Foundation,
21  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
24  * in the United States and other countries.]
25  *
26  * -------------------------
27  * ContourPlotUtilities.java
28  * -------------------------
29  * (C) Copyright 2002-2004, by David M. O'Donnell and Contributors.
30  *
31  * Original Author: David M. O'Donnell;
32  * Contributor(s): David Gilbert (for Object Refinery Limited);
33  *
34  * $Id: ContourPlotUtilities.java,v 1.2 2005/03/16 16:25:49 mungady Exp $
35  *
36  * Changes
37  * -------
38  * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG);
39  * 22-Jul-2003 : Made this class abstract as there is no need to instantiate
40  * it (DG);
41  *
42  */
43
44 package org.jfree.chart.plot;
45
46 import org.jfree.data.Range;
47 import org.jfree.data.contour.ContourDataset;
48 import org.jfree.data.contour.DefaultContourDataset;
49
50 /**
51  * Some utility methods for the {@link ContourPlot} class.
52  *
53  * @author David M. O'Donnell
54  */
55 public abstract class ContourPlotUtilities {
56
57     /**
58      * Returns the visible z-range.
59      *
60      * @param data the dataset.
61      * @param x the x range.
62      * @param y the y range.
63      *
64      * @return The range.
65      */
66     public static Range visibleRange(ContourDataset data, Range x, Range y) {
67         Range range = null;
68         range = ((DefaultContourDataset) data).getZValueRange(x, y);
69         return range;
70     }
71
72 }
73
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