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.graphics;
  
  import java.awt.geom.Dimension2D;
  import java.awt.geom.Rectangle2D;
  import java.io.Serializable;
  
  
  /**
   * Abstract implementation of the {@link Drawable} interface.
   * This class implements common functionality like the different ways for
   * getting and setting the bounding rectangle of the drawable object.
   */
  public abstract class AbstractDrawable implements Drawable, Serializable {
  	/** Version id for serialization. */
  	private static final long serialVersionUID = -684598008467326484L;
  
  	/** Boundaries of the drawable object. */
  	private final Rectangle2D bounds;
  
  	/**
  	 * Creates an AbstractDrawable.
  	 */
  	public AbstractDrawable() {
  		bounds = new Rectangle2D.Double();
  	}
  
  	/**
  	 * Returns the bounds of this {@code Drawable}.
  	 * @return a bounding rectangle
  	 */
  	public Rectangle2D getBounds() {
  		Rectangle2D b = new Rectangle2D.Double();
  		b.setFrame(bounds);
  		return b;
  	}
  
  	/**
  	 * Returns the x-position of the bounds.
  	 * @return horizontal position of the upper-left corner of the bounding
  	 *         rectangle.
  	 */
  	public double getX() {
  		return bounds.getX();
  	}
  	/**
  	 * Returns the y-position of the bounds.
  	 * @return vertical position of the upper-left corner of the bounding
  	 *         rectangle.
  	 */
  	public double getY() {
  		return bounds.getY();
  	}
  
  	/**
  	 * Returns the width of the bounds.
  	 * @return horizontal extent.
  	 */
  	public double getWidth() {
  		return bounds.getWidth();
  	}
  	/**
  	 * Returns the height of the bounds.
  	 * @return vertical extent.
  	 */
  	public double getHeight() {
  		return bounds.getHeight();
  	}
  
  	/**
  	 * Sets the bounds to the specified bounding rectangle.
  	 * @param bounds rectangle containing the component.
  	 */
  	public void setBounds(Rectangle2D bounds) {
  		setBounds(bounds.getX(), bounds.getY(),
  			bounds.getWidth(), bounds.getHeight());
  	}
  	/**
  	 * Sets the bounds to the specified coordinates, width and height.
  	 * This method should be used when overriding functionality.
  	 * @param x horizontal position of the upper-left corner
  	 * @param y vertical position of the upper-left corner
  	 * @param width horizontal extent
  	 * @param height vertical extent
  	 */
  	public void setBounds(double x, double y, double width, double height) {
  		bounds.setFrame(x, y, width, height);
  	}
  
  	/**
  	 * Returns the preferred size of the {@code Drawable}.
  	 * @return horizontal and vertical extent that wants to be reached
  	 */
  	public Dimension2D getPreferredSize() {
  		return new de.erichseifert.gral.util.Dimension2D.Double();
  	}
  }
  