I would go back to your stateless first version an...

# tornadofx

[carlw]

I would go back to your stateless first version and see if your editor updates modify the shown MyItem instances. If you don't see the change taking effect, try expanding/collapsing and that might indicate a requestLayout() is needed

[aimozg]

I can't make MyItem instances immutable. So editor changes their properties but not the references. I could make them Observable though; can't figure out from sources yet if there is InvalidationListenere somewhere that would trigger cellFormat

[aimozg]

No, the TreeCell item being Observable does not trigger cellFormat or some other update

[aimozg]

I see however that the cellFormat is triggered in commitEdit(); I'll try and I believe I could mark cell editable and commitEdit() from editor when needed.