A sample Scala/JavaFX application

By Alvin Alexander. Last updated: June 13 2018

As a brief note to self, here’s an example JavaFX application written in Scala:

object MainWindow {
    def main(args: Array[String]) {
        Application.launch(classOf[MainWindow], args: _*)
    }
}

class MainWindow extends Application  {
    override def start(stage: Stage) {
        val borderPane = new MainBorderPane
        val scene = new Scene(borderPane, 600, 400)
        scene.getStylesheets.add(getClass.getResource("pizza.css").toExternalForm)
        stage.setScene(scene)
        stage.setTitle("Al’s Pizza")
        stage.show
    }
}

A few redeeming features of this example:

It shows the magic recipe to launch a JavaFX application in Scala
It shows how to add a stylesheet to a JavaFX Scene in Scala

Other Scala/JavaFX code snippets

While I’m in the neighborhood, here are a couple of other Scala/JavaFX source code snippets.

Scala + JavaFX Button

val placeOrderButton = new Button

placeOrderButton.setText("Start An Order")
placeOrderButton.setOnAction((e: ActionEvent) => {
    println("Hello World!")
})

placeOrderButton.setFont(new Font("Arial", 24))

Spacer

val spacer = new Region
spacer.setPrefHeight(40)

TextField

val searchField = new TextField
searchField.setPromptText("<search>")

VBox

val vbox = new VBox
vbox.setSpacing(40)
vbox.setAlignment(Pos.CENTER)
vbox.getChildren.addAll(alsPizzaLabel, placeOrderButton, spacer)

MenuItem

Some code to work with a MenuItem, Alert, Buttons, and ButtonType:

addNoteMenuItem.setOnAction(e => {
    val alert = new Alert(AlertType.CONFIRMATION)
    val okButton = new ButtonType("OK")
    val cancelButton = new ButtonType("Cancel", ButtonData.CANCEL_CLOSE)

    alert.setTitle("Add Note")
    val editNotePane = new EditNotePane
    alert.getDialogPane().setExpandableContent(editNotePane)
    alert.showAndWait()
})