| /* |
| * 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.offer(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) |
| } |