public void createPopupMenu() {
super.createPopupMenu();
JPopupMenu popupMenu = getPopupMenu();
if (popupMenu == null) {
popupMenu = new JPopupMenu();
setPopupMenu(popupMenu);
} else {
popupMenu.addSeparator();
}
propertiesItem = new JMenuItem("Properties ...");
propertiesItem.addActionListener(this);
propertiesItem.setMnemonic('s');
popupMenu.add(propertiesItem);
popupMenu.addSeparator();
ButtonGroup group = new ButtonGroup();
inItem = new JRadioButtonMenuItem("IN");
group.add(inItem);
inItem.addActionListener(this);
popupMenu.add(inItem);
outItem = new JRadioButtonMenuItem("OUT");
group.add(outItem);
outItem.addActionListener(this);
popupMenu.add(outItem);
inoutItem = new JRadioButtonMenuItem("INOUT");
group.add(inoutItem);
inoutItem.addActionListener(this);
popupMenu.add(inoutItem);
}
