Scala using Java libraries, taking advantage of lambda expressions support in Java 8

Question

According to: http://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html#lambda-expressions-in-gui-applications

Previously:

btn.setOnActio         


        

Answer 1

One way to achieve this is using implicit transformations what you need to do is to create a new Object that handles all this transformations, something like this:

import javafx.scene.input.MouseEvent
import javafx.event.EventHandler

object FXEvent2HandlerImplicits{
  implicit def mouseEvent2EventHandler(event:(MouseEvent)=>Unit) = new EventHandler[MouseEvent]{
    override def handle(dEvent:MouseEvent):Unit = event(dEvent)
  }
}

Then just import it in any file that you may need the transformation:

import FXEvent2HandlerImplicits._   
//From now on within scope you can now call events like Java8 Lambdas
chart.setOnMouseClicked( (e: MouseEvent) => println("Noice") )

This is just Syntactic sugar to archive the same thing in a more elegant way