a future pinned to the JavaFx app thread

GuiActor.scala

object JavaFXExecutionContext {
  implicit val javaFxExecutionContext: ExecutionContext = ExecutionContext.fromExecutor(new Executor {
    def execute(command: Runnable): Unit = {
      Platform.runLater(command)
    }
  })
}

...

val mJavaFxEc = JavaFXExecutionContext.javaFxExecutionContext

...

val future = Future { comp.init() }(mJavaFxEc)//on the JavaFx thread