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In Vaadin 7 I was using ComboBox.setContainerDataSource(IndexedContainer). The IndexedContainer contained Items with internal value and a localized presentation string. The internal value was bound to a DAO.
In the documentation of ComboBox and "Binding data to forms" I cannot find an example that handles this (which I find very common) use case.
I do comboBox.setItems(Collection<POJO>) and I think I need a converter:
The ComboBox ItemType which I specify in the Designer is my POJO with internal and localized presentation. The DAO needs a String
Do I need a StringToPOJOConverter? Is there an example somewhere?
This is one side of the problem. I solved it by defining a POJO.toString() which returns the localized display string. But you gave me the idea of feeding the ComboBox a collection of keys. That should work