There is no tree node component - the TreeTable and Table use plugable cell renderers (see TableBase) which can potentially use any type of widget to render a cell. Or you can place a widget into a cell if you need an interactive widget (like a check box or a combo box etc).
I understand, but I'm still a beginner. I understand, than TWL uses MVC.
But, Excuse me, May I ask you to show me an example. Simple example (Leaf renderer, Node renderer, String Model), please.
I understand, than the TreeTableModel can be more difficult. It can have different components (for example - different file type).
I'm sorry, if I spend your time.