code: //==============================================================================
  //	
  //	Copyright (c) 2016-
  //	Authors:
  //	* Joachim Klein <klein@tcs.inf.tu-dresden.de> (TU Dresden)
  //	
  //------------------------------------------------------------------------------
  //	
  //	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 explicit.graphviz;
  
  import java.util.BitSet;
  
  /**
   * A decorator for states: Given a BitSet of state indizes, fills
   * the nodes corresponding to these states with a given color.
   */
  public class MarkStateSetDecorator implements Decorator
  {
  	/** The set of states to be marked */
  	private BitSet stateSet;
  	/** The fill colour for the node */
  	private String fillColour = "#cccccc";
  
  	/**
  	 * Constructor, default colour grey.
  	 * @param stateSet the set of state indices to be marked.
  	 */
  	public MarkStateSetDecorator(BitSet stateSet)
  	{
  		this.stateSet = stateSet;
  	}
  
  	/**
  	 * Constructor, default colour grey.
  	 * @param stateSet the set of state indices to be marked.
  	 * @param fillColor HTML colour string for the fill colour
  	 */
  	public MarkStateSetDecorator(BitSet set, String fillColor)
  	{
  		this.stateSet = set;
  		this.fillColour = fillColor;
  	}
  
  	/**
  	 * Add "style=filled" and "fillcolor=..." attributes
  	 * to the decoration.
  	 */
  	@Override
  	public Decoration decorateState(int state, Decoration d)
  	{
  		if (stateSet.get(state)) {
  			d.attributes().put("style", "filled");
  			d.attributes().put("fillcolor", fillColour);
  		}
  		return d;
  	}
  
  }
  