locator = new GpsLocator();
locator.addGpsPositionListener(new MyGpsPositionListener());
routeCalculator = (RouteCalculator) createComponent(
ROUTECALCULATOR_CLASS_PROPERTY, RouteCalculator.class);
if (routeCalculator == null)
routeCalculator = new RouteCalculator();
JToolBar toolbar = frame.getToolbar();
gpsCombo = new JComboBox(new String[] { "GPS Off", "GPS On",
"GPS Center", "GPS Cen+Log", "Read Log" });
gpsCombo.addActionListener(this);