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/*
* Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
// This file was automatically generated from coroutines-guide-ui.md by Knit tool. Do not edit.
package kotlinx.coroutines.javafx.guide.exampleUiBlocking02
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.*
import kotlinx.coroutines.javafx.JavaFx as Main
import javafx.application.Application
import javafx.event.EventHandler
import javafx.geometry.*
import javafx.scene.*
import javafx.scene.input.MouseEvent
import javafx.scene.layout.StackPane
import javafx.scene.paint.Color
import javafx.scene.shape.Circle
import javafx.scene.text.Text
import javafx.stage.Stage
fun main(args: Array<String>) {
Application.launch(ExampleApp::class.java, *args)
}
class ExampleApp : Application() {
val hello = Text("Hello World!").apply {
fill = Color.valueOf("#C0C0C0")
}
val fab = Circle(20.0, Color.valueOf("#FF4081"))
val root = StackPane().apply {
children += hello
children += fab
StackPane.setAlignment(hello, Pos.CENTER)
StackPane.setAlignment(fab, Pos.BOTTOM_RIGHT)
StackPane.setMargin(fab, Insets(15.0))
}
val scene = Scene(root, 240.0, 380.0).apply {
fill = Color.valueOf("#303030")
}
override fun start(stage: Stage) {
stage.title = "Example"
stage.scene = scene
stage.show()
setup(hello, fab)
}
}
fun Node.onClick(action: suspend (MouseEvent) -> Unit) {
val eventActor = GlobalScope.actor<MouseEvent>(Dispatchers.Main, capacity = Channel.CONFLATED) {
for (event in channel) action(event) // pass event to action
}
onMouseClicked = EventHandler { event ->
eventActor.trySend(event)
}
}
fun setup(hello: Text, fab: Circle) {
var result = "none" // the last result
// counting animation
GlobalScope.launch(Dispatchers.Main) {
var counter = 0
while (true) {
hello.text = "${++counter}: $result"
delay(100) // update the text every 100ms
}
}
// compute next fibonacci number of each click
var x = 1
fab.onClick {
result = "fib($x) = ${fib(x)}"
x++
}
}
suspend fun fib(x: Int): Int = withContext(Dispatchers.Default) {
if (x <= 1) x else fib(x - 1) + fib(x - 2)
}
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