_colorizer = new Colorizer(); _legendColorizer = new LegendColorizer(); _colorizer.setEnabled(true); _legendColorizer.setEnabled(false);
	public RenderBox(NController ctl) {		// (1) convert NV2D graph to a data structure usable by Prefuse		// (2) create a new item registry		//  the item registry stores all the visual		//  representations of different graph elements		super(new ItemRegistry(new DefaultGraph(true)));	    		// establish settings controller		_settings = new RenderSettings();		_pFactory = PopupFactory.getSharedInstance();				_ctl = ctl;		// setup the popup menu for vertices		_vertexMenu = new PopupMenu();		_lastItemClicked = null;				// create a new display component to show the data		// setSize(400,400);		// pan(350, 350);		// lets users drag nodes around on screen (Display class method)		addControlListener(new MouseAdapter(this));		addControlListener(new DragControl());		addControlListener(new PanControl());		addControlListener(new ZoomControl());		_colorizer = new Colorizer();		_legendColorizer = new LegendColorizer();		_colorizer.setEnabled(true);		_legendColorizer.setEnabled(false);		_empty = true;		_layoutRunning = false;		_isExternalLayoutHandler = false;		_first_initialization = true;	}