class LVTestView : View("LVTest") {

    val items = mutableListOf(
            "java",
            "kotlin",
            "python"
    );

    // alt: can't use setValue
    //val myitemsProperty : ReadOnlyListProperty<String> =
    //        SimpleListProperty<String>( items.observable() )

    val myitemsProperty : ListProperty<String> =
        SimpleListProperty<String>( items.observable() )

    var lv : ListView<String> by singleAssign()

    override val root = vbox {
        lv = listview<String> {
           itemsProperty().bind( myitemsProperty )
        }
        button("Complete Replacement") {
            setOnAction {
                evt ->
                    myitemsProperty.setValue(
                            listOf(
                                    "one",
                                    "two",
                                    "three"
                            ).observable()
                    )
            }
        }
        spacing = 4.0
        padding = Insets(10.0)
    }
}

class LVTestApp : App(LVTestView::class) {

    override fun createPrimaryScene(view: UIComponent) = Scene(view.root, 480.0, 320.0)
}