Composing.scala

trait MyStyles extends LayoutDsl with MediaQueries with ExtraTweaks {
  // sets text, large font size and a long click handler
  def caption(cap: String)(implicit ctx: Context): Tweak[TextView] =
    text(cap) + TextSize.large + On.longClick {
      Toast.makeText(ctx, "I’m a caption", Toast.LENGTH_SHORT).show()
      true
    }
  
  // sets large font size for high-density screens, medium font size for medium-density screens
  // does nothing in other cases
  def adaptiveSize(implicit ctx: Context): Option[Tweak[TextView]] =
    hdpi ? TextSize.large | mdpi ? TextSize.medium
}