That's the perfect use case for a ViewModel. I think you know how to use that already? 🙂

Yes, I think I already did the most work but I am a bit confused how to finish this

Normally I have a label or something and can pass this as parameter

But this codeArea has no simple text parameter where I can pass this to. I did not understand the magic completely. Read in the TornadoFX doc and saw your videos but it is all about the forms etc. that allow to simply pass a parameter. I think there need to be one simple click to understand it

This is a complete working example:

@User uploaded a file: Untitled

You don't need to pass any parameters. Use a ContactModel if you're in the same class, or inject it if you're in different classes for the editor and the ui where you select the contact.

Instead of using bindSelected, you can even just do currentContact.item = someNewContact

hm, okay, now you have the textarea that supports to pass currentContact.notes, but what when I have something that is provided by a different lib?

In my situation I use org.fxmisc.richtext.CodeArea

That doesn't make any difference. The CodeArea has a textProperty, and you'd bind that textProperty to the notes property in the ViewModel.

And there I have var codeArea = CodeArea() and tried it with codeArea.text(contactModel.notes) as in my example

But it does not update and I have the same content in all tabs even if I select a different contact

I don't know what codreArea.text expects. If it expects a Property<String>, that would work equally well. If not you can bind towards the textProperty of codeArea directly.

I think this is what I need. codeArea.text(contactModel.notes) does not seem to update it

@dr.fornax I looked at the code for CodeArea, I can't find a text function there. Where is it coming from?

Even if the CodeArea didn't expose a textProperty you could bind to, you could listen to changes in the underlying contact object inside the viewmodel and update it manually. contactModel.itemProperty.onChange { codeArea.setText(contactModel.notes.value) }

Binding is the way to go though, just wanted to post it for completeness.

IDEA says that there is a codeArea.textProperty()

I will try your approach. I was sure it is really simple

It is 🙂 hehe

codeArea.textProperty().bind(contactModel.notes)

Hm, bind says it has a receiver type mismatch

@User uploaded a file: Untitled

What's the type of notes?

Rather, post your model.

val notesProperty = SimpleStringProperty(“”) var notes by notesProperty

Model: val notes = bind(Contact::notesProperty)

And you get this error on the codeArea.textProperty().bind() line?

Ah.. codeArea.textProperty().bindBidirectional(contactModel.notes)