package org.merlin.step.nov;import java.awt.*;import java.util.*;public class WBContainer extends Container implements UpdateListener {  ObservableList elements;  Dimension dim;    public WBContainer (ObservableList l, Dimension d) {    elements = l;    dim = d;    elements.addUpdateListener (this);  }  public Dimension getMinimumSize () {    return new Dimension (dim);  }  public Dimension getPreferredSize () {    return getMinimumSize ();  }  public void updateOccurred (UpdateEvent e) {    repaint ();  }  public void paint (Graphics g) {    Rectangle clip = g.getClipBounds ();    if (clip == null)      clip = new Rectangle (getSize ());    Enumeration els = elements.elements ();    while (els.hasMoreElements ()) {      Element el = (Element) els.nextElement ();      if ((el != null) && el.getBounds ().intersects (clip))        el.paint (g);    }    super.paint (g);  }}