/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* --------------
* DialScale.java
* --------------
* (C) Copyright 2006-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 03-Nov-2006 : Version 1 (DG);
* 17-Oct-2007 : Made this an extension of the DialLayer interface (DG);
*
*/
package org.jfree.chart.plot.dial;
/**
* A dial scale is a specialised layer that has the ability to convert data
* values into angles.
*
* @since 1.0.7
*/
public interface DialScale extends DialLayer {
/**
* Converts a data value to an angle (in degrees, using the same
* specification as Java's Arc2D class).
*
* @param value the data value.
*
* @return The angle in degrees.
*
* @see #angleToValue(double)
*/
public double valueToAngle(double value);
/**
* Converts an angle (in degrees) to a data value.
*
* @param angle the angle (in degrees).
*
* @return The data value.
*
* @see #valueToAngle(double)
*/
public double angleToValue(double angle);
}
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