Scaladin registration example 1-2: table and form added

MongoExample1-2.scala

import vaadin.scala._
import com.mongodb.casbah.Imports._
import com.novus.salat.grater
import com.novus.salat.global._
import scala.util.Random
import scala.reflect.BeanProperty

class MongoExample extends Application("Mongo & Vaadin, tied together with Scala") {

  val registrations: MongoCollection = MongoConnection()("vaadin-scala-mongo-example")("registrations")
  def mapRegistrations: List[Registration] = registrations.map(grater[Registration].asObject(_)).toList
  def saveRegistration(registration: Registration): Unit = registrations += grater[Registration].asDBObject(registration)

  override val main: ComponentContainer = new VerticalLayout {
    sizeFull()
    styleName = Reindeer.LAYOUT_WHITE

    val tableLayout = new VerticalLayout {
      size(50 pct, 50 pct)
      spacing = true

      val table = new Table {
        sizeFull()
        styleNames += (Reindeer.TABLE_BORDERLESS, Reindeer.TABLE_STRONG)
        container = new BeanItemContainer(mapRegistrations)
        visibleColumns = Seq("username", "realName")
      }

      val addButton = Button("Register", showForm)
      components += (table, addButton)
    }

    lazy val form = new Form {
      size(50 pct, 50 pct)
      caption = "Registration"
      footer = new HorizontalLayout {
        components += Button("Save", showList)
      }
    }

    components += tableLayout
    alignment(tableLayout -> Alignment.MiddleCenter)

    def showForm(): Unit = { /*TODO*/ }
    def showList(): Unit = { /*TODO*/ }

  }
}

case class Registration(
  @BeanProperty var username: String = "username" + Random.nextInt,
  @BeanProperty var password: String = "",
  @BeanProperty var realName: String = "Joe Tester")