RxJava and JavaFX Autocomplete test

rxjava_javafx_autcomplete.txt

/* Include these Gradle dependencies
compile 'no.tornado:tornadofx:1.5.4'
compile 'com.github.thomasnield:rxkotlinfx:0.1.4'
compile 'io.reactivex:rxkotlin:0.60.0'
*/

import javafx.scene.input.KeyEvent
import rx.javafx.kt.events
import rx.javafx.kt.observeOnFx
import rx.lang.kotlin.toObservable
import tornadofx.App
import tornadofx.View
import tornadofx.textfield
import tornadofx.vbox
import java.util.concurrent.TimeUnit

class MyApp: App(MyView::class)

class MyView : View("My View") {
    override val root = vbox {
        textfield {

            val burstyMulticast = events(KeyEvent.KEY_TYPED).publish().refCount()
                    .doOnNext { it.consume() }
                    .map { it.character }

            burstyMulticast.throttleWithTimeout(200, TimeUnit.MILLISECONDS).startWith("")
                    .switchMap {
                        burstyMulticast.scan { x,y -> x + y }
                                .switchMap { input ->
                                    states.filter { it.toUpperCase().startsWith(input.toUpperCase()) }.take(1)
                                        .map { it.split(Regex("(?<=$input)")) }
                                        .filter { it.size == 2 }
                                }
                    }.observeOnFx().subscribe {
                        text = it[0] + it[1]
                        positionCaret(it[0].length)
                        selectEnd()
                    }
        }
    }


    val states = listOf("Alabama",
            "Alaska",
            "Arizona",
            "Arkansas",
            "California",
            "Colorado",
            "Connecticut",
            "Delaware",
            "Florida",
            "Georgia",
            "Hawaii",
            "Idaho",
            "Illinois Indiana",
            "Iowa",
            "Kansas",
            "Kentucky",
            "Louisiana",
            "Maine",
            "Maryland",
            "Massachusetts",
            "Michigan",
            "Minnesota",
            "Mississippi",
            "Missouri",
            "Montana Nebraska",
            "Nevada",
            "New Hampshire",
            "New Jersey",
            "New Mexico",
            "New York",
            "North Carolina",
            "North Dakota",
            "Ohio",
            "Oklahoma",
            "Oregon",
            "Pennsylvania Rhode Island",
            "South Carolina",
            "South Dakota",
            "Tennessee",
            "Texas",
            "Utah",
            "Vermont",
            "Virginia",
            "Washington",
            "West Virginia",
            "Wisconsin",
            "Wyoming").toObservable()
}