PositionLayout in Scala

object PositionTest extends Frame {
  val button1 = new Button("Button")
  val button2 = new Button("Button")

  val positionPanel = new PositionPanel {
    add(button1,
      Seq((PositionPanel.Property.Left, 10), (PositionPanel.Property.Right, .5f),
          (PositionPanel.Property.Top, 10), (PositionPanel.Property.Bottom, 10)))

    add(button2,
      Seq((PositionPanel.Property.HCenter, .125f), (PositionPanel.Property.Top, 10),
          (PositionPanel.Property.Height, .25f), (PositionPanel.Property.Width, .25f)))
  }

  title = "Test"
  preferredSize = new Dimension(300, 200)
  contents = positionPanel

  def main (args: Array[String]): Unit = {
    PositionTest.visible = true

    println (PositionTest.button1)
    println (PositionTest.button2)
  }
}