ComboBox has no proper docs. Everytime I use it, I forget how to put the correct reactions.

ComboBoxEvents.scala

import scala.swing._

new Frame {
  contents = new ComboBox(Seq("one", "two")) {
    listenTo(selection)
    reactions += {
      case event.SelectionChanged(_) => println(selection.item)
    }
  }
  pack()
  centerOnScreen()
  open()
}