Scala model-view-presenter, traits

Question

I am a fan of Martin Fowler\'s (deprecated) model-view-presenter pattern. I am writing a Scala view class containing several button classes. I would like to include methods to s

Answer 1

Scala is less about explicit setter and getter methods than java. Instead use abstract fields to define the exposed interface. How about something like this:

trait ActionUser {
  def setAction(action:Action):Unit
}

trait Container {
  val aButton:ActionUser
}

trait ContainerImpl {
  val aButton = new JButton with ActionUser
}

Classes operating against Container will only be able to access setAction while internal methods see it as a JButton.

One more note: C uses macros to cut down on code duplication. Scala uses multi-inheritance of traits to accomplish the same thing.