/*
    * Copyright (c) 2005, The JUNG Authors
    * All rights reserved.
    * 
    * This software is open-source under the BSD license; see either "license.txt"
    * or https://github.com/jrtom/jung/blob/master/LICENSE for a description.
    * 
    * Created on Oct 9, 2004
    *
    */
  package edu.uci.ics.jung.visualization.layout;
  
  import java.awt.geom.Point2D;
  import java.io.IOException;
  import java.io.Serializable;
  
  import edu.uci.ics.jung.algorithms.layout.Layout;
  
  /**
   * interface for PersistentLayout
   * Also holds a nested class Point to serialize the
   * Vertex locations
   * 
   * @author Tom Nelson 
   */
  public interface PersistentLayout<V, E> extends Layout<V,E> {
      
      void persist(String fileName) throws IOException;
  
      void restore(String fileName) throws IOException, ClassNotFoundException;
      
      void lock(boolean state);
      
      /**
       * a serializable class to save locations
       */
      @SuppressWarnings("serial")
  	static class Point implements Serializable {
          public double x;
          public double y;
          public Point(double x, double y) {
              this.x=x;
              this.y=y;
          }
          public Point(Point2D p) {
          	this.x = p.getX();
          	this.y = p.getY();
          }
      }
  
  }