/*
    * 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.
    *
    * 
    */
  package edu.uci.ics.jung.visualization.util;
  
  import edu.uci.ics.jung.algorithms.util.IterativeContext;
  
  /**
   * 
   * 
   * @author Tom Nelson - tomnelson@dev.java.net
   *
   */
  public class Animator implements Runnable {
  	
  	protected IterativeContext process;
  	protected boolean stop;
  	protected Thread thread;
  	
  	/**
  	 * how long the relaxer thread pauses between iteration loops.
  	 */
  	protected long sleepTime = 10L;
  
  	
  	public Animator(IterativeContext process) {
  		this(process, 10L);
  	}
  
  	public Animator(IterativeContext process, long sleepTime) {
  		this.process = process;
  		this.sleepTime = sleepTime;
  	}
  
  	/**
  	 * @return the relaxer thread sleep time
  	 */
  	public long getSleepTime() {
  		return sleepTime;
  	}
  
  	/**
  	 * @param sleepTime the relaxer thread sleep time to set
  	 */
  	public void setSleepTime(long sleepTime) {
  		this.sleepTime = sleepTime;
  	}
  	
  	public void start() {
  		// in case its running
  		stop();
  		stop = false;
  		thread = new Thread(this);
  		thread.setPriority(Thread.MIN_PRIORITY);
  		thread.start();
  	}
  	
  	public synchronized void stop() {
  		stop = true;
  	}
  
  	public void run() {
  		while (!process.done() && !stop) {
  
  			process.step();
  
  			if (stop)
  				return;
  
  			try {
  				Thread.sleep(sleepTime);
  			} catch (InterruptedException ie) {
  			}
  		}
  	}
  }