code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Mark Kattenbelt <mark.kattenbelt@comlab.ox.ac.uk> (University of Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM is free software; you can redistribute it and/or modify
  //	it under the terms of the GNU General Public License as published by
  //	the Free Software Foundation; either version 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM 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 PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package userinterface.graph;
  
  import java.util.*;
  
  import javax.swing.*;
  
  /**
   * Representation of an axis of a Graph.
   * The settings are propagated to the JFreeChart library.
   */
  @SuppressWarnings("serial")
  public class SeriesSettingsList extends AbstractListModel implements Observer
  {
  	private Graph graph;
  	
  	private HashMap<Integer, Graph.SeriesKey> seriesKeys;
  	
  	public SeriesSettingsList(Graph graph)
  	{
  		this.graph = graph;
  		this.seriesKeys = new HashMap<Integer, Graph.SeriesKey>();
  	}	
  
  	public Object getElementAt(int index) 
  	{
  		synchronized (graph.getSeriesLock())
  		{
  			return graph.getGraphSeries(seriesKeys.get(index));
  		}		
  	}
  	
  	public Graph.SeriesKey getKeyAt(int index)
  	{
  		synchronized (graph.getSeriesLock())
  		{
  			return seriesKeys.get(index);
  		}
  	}
  
  	public int getSize() 
  	{
  		return seriesKeys.size();
  	}
  	
  	public void updateSeriesList()
  	{
  		synchronized (graph.getSeriesLock())
  		{
  			for (Map.Entry<Integer, Graph.SeriesKey> entry : seriesKeys.entrySet())
  			{			
  				SeriesSettings series = graph.getGraphSeries(entry.getValue());
  				if (series != null)
  					series.deleteObserver(this);
  			}
  			
  			seriesKeys.clear();
  			
  			for (Graph.SeriesKey key: graph.getAllSeriesKeys())
  			{
  				seriesKeys.put(graph.getJFreeChartIndex(key), key);
  				graph.getGraphSeries(key).updateSeries();
  				graph.getGraphSeries(key).addObserver(this);				
  			}
  		}
  		
  		fireContentsChanged(this, 0, this.getSize());		
  	}
  	
  	public void update(Observable o, Object arg) 
  	{		
  		fireContentsChanged(this, 0, this.getSize());
  	}
  }
  