class FrmInvitationToTender {
   val gridCatalog = new GridCatalogs()

  val onChoiceItem = SinkObserver.create[ ( String, String ) ]{ case ( id, description ) =>
    grid.hdlRowActive.foreach { idx =>
      store.store.onNext (
        store.UpdateIdx(idx, Tenderer (id_comparative = "100-2019-ADQ2",key_provider = id, business_name = Some(description)))
        )
    }
    hdlCatalog.onNext(Seq.empty)
    Continue
  }

    val gridCatalogSearchResult = grid.hdlPositionCursor.combineLatest ( hdlCatalog ).map { case ( pos, catalog ) =>
    val cata = catalog.map ( i => i._1 -> i._2 ).toMap
    if (!catalog.isEmpty)
      Some(gridCatalog.render(cata, pos, cata.isEmpty, onChoiceItem))
    else
      None
  }

  def mainGrid ( items: Map [ Int, Map [ String,String ] ] ) =
    div ( clear.both, marginTop := "40px",
        grid.render ( items ),
        gridCatalogSearchResult
    )

 def render =  store.store.switchMap { case (a, s) =>        // concatMap or switchMap { s =>       // for { s <- store.store } yield {
    val dataGrid = s.tenderers.items.zipWithIndex.map{case(prov,i)=>i->Seq("rfc"->prov.key_provider,"proveedor"->prov.business_name.getOrElse("")).toMap }.toMap
    Observable ( mainGrid(dataGrid) )
  }
}