public EnvelopeWidget(String l, Patch p, Node[] n,
public EnvelopeWidget(String l, IPatch p, Node[] n,
    public EnvelopeWidget(String l, Patch p, Node[] n,			  int xpad, int ypad) {	super(l, p, null, null);	nodes = n;	xpadding = xpad;	ypadding = ypad;	createWidgets();        layoutWidgets();    }