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/*
* Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package examples
import kotlinx.coroutines.*
import kotlinx.coroutines.future.*
import kotlinx.coroutines.swing.*
import java.awt.*
import java.util.concurrent.*
import javax.swing.*
private fun createAndShowGUI() {
val frame = JFrame("Async UI example")
frame.defaultCloseOperation = JFrame.EXIT_ON_CLOSE
val jProgressBar = JProgressBar(0, 100).apply {
value = 0
isStringPainted = true
}
val jTextArea = JTextArea(11, 10)
jTextArea.margin = Insets(5, 5, 5, 5)
jTextArea.isEditable = false
val panel = JPanel()
panel.add(jProgressBar)
panel.add(jTextArea)
frame.contentPane.add(panel)
frame.pack()
frame.isVisible = true
GlobalScope.launch(Dispatchers.Swing) {
for (i in 1..10) {
// 'append' method and consequent 'jProgressBar.setValue' are called
// within Swing event dispatch thread
jTextArea.append(
startLongAsyncOperation(i).await()
)
jProgressBar.value = i * 10
}
}
}
private fun startLongAsyncOperation(v: Int) =
CompletableFuture.supplyAsync {
Thread.sleep(1000)
"Message: $v\n"
}
fun main(args: Array<String>) {
SwingUtilities.invokeLater(::createAndShowGUI)
}
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