you can adjust visibility with

visibleProperty().bind()

that has the same problem as using

disabledProperty

, the

required()

set once and doesn't change when you change the checkbox

You can register your own listener for changes to an observable, if there is no property to bind to

sealed class itemViewInstance {
    data class item1(val item1: item1Model): itemViewInstance()
    data class item2(val item2: item2Model): itemViewInstance()
}

I have this

model class

. array:

val itemlist = FXCollections.observableArrayList<ItemViewInstance>()

and

private val ItemListView = listview(itemlist) {
        selectionModel.selectedItemProperty().addListener { _, _, new ->
            if (new != null) {
                // There I wanna get Item id somehow, which exists in both models (Item1Model and Item2Model)
            }
        }

is there any way I could get itemid on selection from the list?

@chickenfresh This example builds a list off of the members of a sealed class. It uses cellFormat{} to display the sealed class member. The question you asked is handled in the unpacking of the class in the selectedItemstring.bind call which gives you the when statement I think you're looking for

You’re using

val instances

instead of my

val itemlist

?

just thinking about difference

i don't think it matters. mine is more idiomatic. i try to stay away from Java static methods although I pulled in Bindings.selected in the code I just posted

Works_w__Static_Method.kt

@chickenfresh Make sure you keep your class names capitalized, especially with classes called "instance" and nested classes

yeah, I’m using addAll in maincontroller to add objects already

If this looks ok, I'll post it to your StackOverflow ticket

Okay, I’ll tell you soon

I'm curious about the sealed class. It looks like there isn't a problem coding to it, but are you trying to restrict the inheritance in some way?

@edvin I wonder if there's an application for sealed classes within the wizard. Each page is a class member. 🤔

I'm having some trouble with a

longpress

event handler. I have some animation on the view and it doesn't seem that those get along, but from my googling, it should be okay...

https://gitbucket.light.kow.is/dkowis/deskScreen <-- source code Run the

DesktopScreen

entry point

I get a this:

java.lang.IllegalStateException: showAndWait is not allowed during animation or layout processing

😞

@carlw Nah, my global goal is, as I’ve said before, to add (parsed JSON array of objects into model class) and update, when needed, objects in the listview. Each type of object can be displayed differently and has its unique functions. I’m new to kotlin, but as for Java developer I found this way easier at least for me. I couldn’t rewrite everything for wrapper class as I’m not the author of first app’s versions, even though I’m trying My main view is splitpane, in left pane I have list of <ItemGroup>instances, by selection it opens its items in right pane. Now I’m easily displaying them with

when

thing, last goal is getting model’s

id

on selection so I can request list of items from its group and display on right pane. Right pane works in the same way except it asks server for update periodically

@carlw

StringProperty [bound, invalid]

on Selection i get this

I’ve fixed it with this:

selectionModel.selectedItemProperty().addListener { _, _, new ->
            if (new != null) {
                val sel = selectionModel.selectedItemProperty().value
                when (sel){
                    is ItemViewInstance.Item1 -> println(sel.item1.id)
                    is ItemViewInstance.Item2 -> println(sel.item2.id)
                    else -> throw Exception("$sel")
                }
                }
        }

works awesome

you shouldn't have to use listeners for this requirement. did my example throw the exception?

@chickenfresh Our intern put together this project which uses Klaxon for custom JSON processing if you need something that TornadoFX doesn't provide out-of-the-box. (We used Klaxon for teaching purposes rather than for some special requirement.) https://github.com/bekwam/k4stem/tree/master/k4stem-lab-assistant

whats wrong with listeners?

my

override root...

looks like:

override val root = splitpane {
borderpane{
top = ...
center = ItemListView
....

I needed to rewrite your view a little (like to put in my wrapper), it didnt show textfield

@beepdog laughing at the kow.is package name in kotlin

Yeah it didn't quite work out like i wanted, but I do own kow.is, so uh, yeah

but I’ve got it in println using

runAsync{
Thread.sleep(5000)
println(selectedItemString)}

sleep was used to get value after item selected (counter starts on app start but I got enough time to select)

has me thinking about an Eritrean address - walk.er