ScalaFX is a UI DSL written within the Scala Language that sits on top of JavaFX. Every ScalaFX application is also a valid Scala application. It supports full interoperability with Java and can run anywhere the Java Virtual Machine (JVM) and JavaFX are supported.

ScalaFX uses a simple, hierarchical pattern for creating new objects and building up the scene graph. Here is a simple, complete application example that creates a new stage (window) with a button and a label that updates as the button is clicked:

import scalafx.application.JFXApp3
import scalafx.beans.property.IntegerProperty
import scalafx.geometry.Pos
import scalafx.scene.Scene
import scalafx.scene.control.{Button, Label}
import scalafx.scene.layout.VBox

object HelloStageDemo extends JFXApp3:

  override def start(): Unit =
    val clickCount = IntegerProperty(0)

    val messageLabel = new Label:
      text <== clickCount.asString("Clicked %d times")

    val button = new Button("Click Me"):
      onAction = _ => clickCount.value += 1

    stage = new JFXApp3.PrimaryStage:
      title = "Hello Stage"
      width = 300
      height = 150
      scene = new Scene:
        root = new VBox:
          alignment = Pos.Center
          spacing = 20
          children = Seq(messageLabel, button)

Some of the features of ScalaFX include:

• A programmer-friendly object-literal-like syntax
• Natural Language Bind Expressions
• Tailored Animation Syntax
• Fully Type-Safe APIs
• Seamless JavaFX/ScalaFX Interoperability

To learn more watch the presentation below and read the Documentation section.

ScalaFX Overview Presentation

Stephen Chin presentation JavaFX 2 and Scala - Like Milk and Cookies (33 Degrees)

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