如何根据另一个itemRenderer中的操作更改itemRenderer中的State？

I have a DataGridColumn with an ItemRenderer that extends the Box component. The default display is a Text component. When the user clicks on the text component, I change the State to add a PopUpMenuButton child, and make the Text component invisible. This works fine. However, I only want to allow one PopUpMenuButton to be visible in the DataGrid at a time (similar to how an itemEditor works). I don't want to use an itemEditor, because I've run into too many problems trying to get that to work in this instance.I have a DataGridColumn with an ItemRenderer th