| import kotlinx.coroutines.experimental.future.await |
| import kotlinx.coroutines.experimental.launch |
| import kotlinx.coroutines.experimental.swing.Swing |
| import java.awt.Insets |
| import java.util.concurrent.CompletableFuture |
| 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 |
| |
| launch(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) |
| } |