content: // ===============================================================================
  // Authors: AFRL/RQQD
  // Organization: Air Force Research Laboratory, Aerospace Systems Directorate, Power and Control Division
  // 
  // Copyright (c) 2017 Government of the United State of America, as represented by
  // the Secretary of the Air Force.  No copyright is claimed in the United States under
  // Title 17, U.S. Code.  All Other Rights Reserved.
  // ===============================================================================
  
  /*
   * GRAL: GRAphing Library for Java(R)
   *
   * (C) Copyright 2009-2013 Erich Seifert <dev[at]erichseifert.de>,
   * Michael Seifert <mseifert[at]error-reports.org>
   *
   * This file is part of GRAL.
   *
   * GRAL 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 3 of the License, or
   * (at your option) any later version.
   *
   * GRAL 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 GRAL.  If not, see <http://www.gnu.org/licenses/>.
   */
  package de.erichseifert.gral.data;
  
  import java.util.EventObject;
  
  /**
   * Class that stores information on a change of a specific data value in a
   * data source.
   * @see DataListener
   * @see DataSource
   */
  public class DataChangeEvent extends EventObject {
  	/** Version id for serialization. */
  	private static final long serialVersionUID = -3791650088885473144L;
  
  	/** Column of the value that has changed. */
  	private final int col;
  	/** Row of the value that has changed. */
  	private final int row;
  	/** Value before changes have been applied. */
  	private final Comparable<?> valOld;
  	/** Changed value. */
  	private final Comparable<?> valNew;
  
  	/**
  	 * Initializes a new event with data source, position of the data value,
  	 * and the values.
  	 * @param <T> Data type of the cell that has changed.
  	 * @param source Data source.
  	 * @param col Columns of the value.
  	 * @param row Row of the value.
  	 * @param valOld Old value.
  	 * @param valNew New value.
  	 */
  	public <T> DataChangeEvent(DataSource source, int col, int row,
  			Comparable<T> valOld, Comparable<T> valNew) {
  		super(source);
  		this.col = col;
  		this.row = row;
  		this.valOld = valOld;
  		this.valNew = valNew;
  	}
  
  	/**
  	 * Returns the column index of the value that was changed.
  	 * @return Column index of the changed value.
  	 */
  	public int getCol() {
  		return col;
  	}
  
  	/**
  	 * Returns the row index of the value that was changed.
  	 * @return Row index of the changed value.
  	 */
  	public int getRow() {
  		return row;
  	}
  
  	/**
  	 * Returns the old value before it has changed.
  	 * @return Value before the change.
  	 */
  	public Comparable<?> getOld() {
  		return valOld;
  	}
  
  	/**
  	 * Returns the new value after the change has been applied.
  	 * @return Value after the change.
  	 */
  	public Comparable<?> getNew() {
  		return valNew;
  	}
  }
  