void eventNotify() {
   int event = -1;
   synchronized (taskList) {
     for (Enumeration e = taskList.elements(); e.hasMoreElements(); ) {
       TransferTask t = (TransferTask) e.nextElement();
       if (t.showEvent) event = t.getImageIndex();
     }
   }
   Integer icon = (event < 0) ? null : new Integer(event);
   StaticData.getInstance().roster.setEventIcon(icon);
 }