gistfile1.scala

package code.comet

import net.liftweb._
import http._
import util._

/**
 * The screen real estate on the browser will be represented
 * by this component.  When the component changes on the server
 * the changes are automatically reflected in the browser.
 */
class Chat extends CometActor with CometListener {

  private var msgs = List.empty[String]


  /**
   * When the component is instantiated, register as
   * a listener with the ChatServer
   */
  def registerWith = ChatServer

  /**
   * The CometActor is an Actor, so it processes messages.
   * In this case, we're listening for Vector[String],
   * and when we get one, update our private state
   * and reRender() the component.  reRender() will
   * cause changes to be sent to the browser.
   */
  override def lowPriority = {
    case v: List[String] => msgs = v; reRender()
  }

  /**
   * Put the messages in the li elements and clear
   * any elements that have the clearable class.
   */
  def render = {
    val smt = msgs map {m => m + "asdf"}
    "li *" #> smt & ClearClearable
  }
}