Source for 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
  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: }