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JChart2D is an easy to use component for displaying two- dimensional traces in a coordinate system written in Java.

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/*
 * ITracePainter.java,  provides new instances of ITracePoint2D whenever
 * jchart needs to create them.
 * Copyright (c) 2004 - 2011  Achim Westermann, [email protected]
 *
 *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *  If you modify or optimize the code in a useful way please let me know.
 *  [email protected]
 */
package info.monitorenter.gui.chart;
/**
 * Interface for creation of new instances of {@link ITracePoint2D} which will be used wherever a chart 
 * component tree has to create them. 
 *  
 *
 * @author Achim Westermann 
 * @version $Revision: 1.3 $
 */
public interface ITracePointProvider {

  /**
   * Callback for creating trace points.
   * 
   * 
   * @param x the x value for the new instance. 
   * 
   * @param y the y value for the new instance. 
   * 
   * @return the desired trace point implementation to use.
   */
  public abstract ITracePoint2D createTracePoint(final double x, final double y);
}