/*
 * Open Source Physics software is free software as described near the bottom of this code file.
 *
 * For additional information and documentation on Open Source Physics please see:
 * <http://www.opensourcephysics.org/>
 */

package org.opensourcephysics.display3d.core;
import org.opensourcephysics.controls.XMLControl;

/**
 * <p>Title: ElementSpring</p>
 * <p>Description: A 3D spring.</p>
 * @author Francisco Esquembre
 * @version March 2005
 */
public interface ElementSpring extends Element {
  /**
   * Sets the radius of the spring.
   * @param radius the radius of the spring (normal to its direction)
   */
  public void setRadius(double radius);

  /**
   * Gets the radius of the spring.
   */
  public double getRadius();

  // ----------------------------------------------------
  // XML loader
  // ----------------------------------------------------
  static abstract class Loader extends Element.Loader {
    public void saveObject(XMLControl control, Object obj) {
      super.saveObject(control, obj);
      ElementSpring element = (ElementSpring) obj;
      control.setValue("radius", element.getRadius()); //$NON-NLS-1$
    }

    public Object loadObject(XMLControl control, Object obj) {
      super.loadObject(control, obj);
      ElementSpring element = (ElementSpring) obj;
      element.setRadius(control.getDouble("radius")); //$NON-NLS-1$
      return obj;
    }

  }

}

/*
 * Open Source Physics software is free software; you can redistribute
 * it and/or modify it under the terms of the GNU General Public License (GPL) as
 * published by the Free Software Foundation; either version 2 of the License,
 * or(at your option) any later version.

 * Code that uses any portion of the code in the org.opensourcephysics package
 * or any subpackage (subdirectory) of this package must must also be be released
 * under the GNU GPL license.
 *
 * This software 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
 * or view the license online at http://www.gnu.org/copyleft/gpl.html
 *
 * Copyright (c) 2007  The Open Source Physics project
 *                     http://www.opensourcephysics.org
 */