if (transferData instanceof Location) {
((Location) transferData).setLocation(dropLocation.x,
dropLocation.y,
proj);
OMGraphicHandlerLayer omlayer = null;
String layer_name;
Enumeration keys = layers.keys();
while (keys.hasMoreElements()) {
layer_name = keys.nextElement().toString();
omlayer = (OMGraphicHandlerLayer) layers.get(layer_name);
if (omlayer.isVisible()) {
JMenuItem menuItem = new JMenuItem(layer_name);
menuItem.setHorizontalTextPosition(SwingConstants.CENTER);
menuItem.setBorder(compoundborder);
menuItem.addActionListener(this);
popup.add(menuItem);