Using ParentBarItem to show a PopupContainer

What I want to do is to have ParentBarItem behavior but instead of showing a menu, I want to show a PopupContainer. I know I could use a DropDownBarItem but I don't want the user to be able to "click" the menu item itself rather it should behave just like a ParentBarItem. So there are two ways I could see this working, either use a ParentBarItem and replace the child menu with a PopupContainer or use a DropDownBarItem and prevent the user from clicking the menu item. However, I don't see anyway of doing these two scenarios. Any ideas?

James, I think we could make the dropdownbaritem support a unclickable dropdown mode. We will give this high-priority for our next release. Regards, Praveen Ramesh