1 /*
<lambda>null2  * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
3  */
4 
5 // This file was automatically generated from coroutines-guide-ui.md by Knit tool. Do not edit.
6 package kotlinx.coroutines.javafx.guide.exampleUiBlocking02
7 
8 import kotlinx.coroutines.*
9 import kotlinx.coroutines.channels.*
10 import kotlinx.coroutines.javafx.JavaFx as Main
11 import javafx.application.Application
12 import javafx.event.EventHandler
13 import javafx.geometry.*
14 import javafx.scene.*
15 import javafx.scene.input.MouseEvent
16 import javafx.scene.layout.StackPane
17 import javafx.scene.paint.Color
18 import javafx.scene.shape.Circle
19 import javafx.scene.text.Text
20 import javafx.stage.Stage
21 
22 fun main(args: Array<String>) {
23     Application.launch(ExampleApp::class.java, *args)
24 }
25 
26 class ExampleApp : Application() {
<lambda>null27     val hello = Text("Hello World!").apply {
28         fill = Color.valueOf("#C0C0C0")
29     }
30 
31     val fab = Circle(20.0, Color.valueOf("#FF4081"))
32 
<lambda>null33     val root = StackPane().apply {
34         children += hello
35         children += fab
36         StackPane.setAlignment(hello, Pos.CENTER)
37         StackPane.setAlignment(fab, Pos.BOTTOM_RIGHT)
38         StackPane.setMargin(fab, Insets(15.0))
39     }
40 
<lambda>null41     val scene = Scene(root, 240.0, 380.0).apply {
42         fill = Color.valueOf("#303030")
43     }
44 
startnull45     override fun start(stage: Stage) {
46         stage.title = "Example"
47         stage.scene = scene
48         stage.show()
49         setup(hello, fab)
50     }
51 }
52 
onClicknull53 fun Node.onClick(action: suspend (MouseEvent) -> Unit) {
54     val eventActor = GlobalScope.actor<MouseEvent>(Dispatchers.Main, capacity = Channel.CONFLATED) {
55         for (event in channel) action(event) // pass event to action
56     }
57     onMouseClicked = EventHandler { event ->
58         eventActor.offer(event)
59     }
60 }
61 
setupnull62 fun setup(hello: Text, fab: Circle) {
63     var result = "none" // the last result
64     // counting animation
65     GlobalScope.launch(Dispatchers.Main) {
66         var counter = 0
67         while (true) {
68             hello.text = "${++counter}: $result"
69             delay(100) // update the text every 100ms
70         }
71     }
72     // compute next fibonacci number of each click
73     var x = 1
74     fab.onClick {
75         result = "fib($x) = ${fib(x)}"
76         x++
77     }
78 }
79 
<lambda>null80 suspend fun fib(x: Int): Int = withContext(Dispatchers.Default) {
81     if (x <= 1) x else fib(x - 1) + fib(x - 2)
82 }
83