Lifted,
When i look at the button behavior using firebug, this is the following
error i see.
F891109765602PT1 is not defined
onclick(click clientX=950, clientY=152)1tbfBLwe...6bg%3D%3D (line 2)
(F891109765602PT1, lift_ajaxHand...whatField").attr("value"), null, null));
It would appear that however the
ajaxCall(JsRaw("$('#whatField').attr('value')")
is working it is setting up a handle that is stale by the time the behavior
is actually invoked. This is behind-the-scenes stuff for a programmer like
me. It's part of what lift is s'posed to provide. Moreover, i get no help
from the compiler. The code i have written is well-typed. Any help would be
greatly appreciated.
Best wishes,
--greg
On Sat, May 2, 2009 at 8:50 PM, Meredith Gregory
<lgreg.mered...@gmail.com>wrote:
> Lifted,
>
> i'm putting together a little lift-based testharness in which to evaluate
> various solutions to the challenge Martin posted recently regarding scalable
> abstractions for a little lambda interpreter. You can get a copy of the app
> here <http://svn.biosimilarity.com/src/open/rlambda/trunk/>. (Please note:
> this is a testharness and not a proposed solution. i've got a couple of
> solutions in mind, but before i post them, i'd like to put them in a web
> "container".) As usual, i'm running into problems on the frontend. i'm not
> getting expected callback behavior, and, moreover, the code i'm using used
> to work fine.
>
> The snippet code is included below this email's closing. The relevant
> fragment is listed just below. The behavior i see is that the button
> produces no behavior on the server at all. The CR/LF event on the text field
> causes updateWhat to be called twice. Any advice on the frontend behavior
> would be greatly appreciated.
>
> def whatNode(termStr : String) = {
> theTerm = termStr
> theClientRequestStr = evalStr()
> var theParseResponseStr : String =
> ("failure: " + theClientRequestStr + "\n");
> try {
> theParseResponseStr =
> theREPL.showClientRequestParseTree(theClientRequestStr)
> println( "parsed : " + theParseResponseStr );
> //theREPL.readEvalPrint(theClientRequestStr)
> }
> catch {
> case e => {
> val sw : java.io.StringWriter = new java.io.StringWriter( );
> e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> theParseResponseStr = theParseResponseStr + e.toString
> }
> }
> <div id="parseTree">{theParseResponseStr}</div>
> }
>
> def updateWhat(str: String): JsCmd = {
> println("updateWhat with " + str)
> JsCmds.SetHtml("parseTree", whatNode(str))
> }
>
> def show(xhtml: NodeSeq): NodeSeq = {
> <xml:group>
> <label for="whatField">Term :</label>
> { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id" ->
> "whatField") }
> { <button type="button">{?("Go")}</button> %
> ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> updateWhat(s))) }
> <br/>
> <div id="parseTree">{whatNode(evalStr())}</div>
> </xml:group>
> }
>
> Best wishes,
>
> --greg
>
> package com.biosimilarity.reflection.snippet
>
> import net.liftweb._
> import http._
> import S._
> import SHtml._
> import util._
> import Helpers._
> import mapper._
> import textile._
> import js.{JE, JsCmd, JsCmds}
> import JsCmds._
> import JE._
>
> import com.biosimilarity.reflection.model.REPL
>
> import scala.xml._
>
> class REPLForm {
> val theREPL = new REPL()
> var theTerm : String = "lambda x.x"
> var theClientRequestStr : String = evalStr()
>
> def evalStr() = theTerm
> def clientRequestRequest() = theClientRequestStr
>
> def parseTreeNode(clientRequestStr : String) = {
> theClientRequestStr = clientRequestStr.replace( "\n", "" );
> var theParseResponseStr : String =
> ( "failure: " + theClientRequestStr + "\n" );
> try {
> theParseResponseStr =
> theREPL.showClientRequestParseTree(theClientRequestStr)
> //theREPL.readEvalPrint(theClientRequestStr)
> }
> catch {
> case e => {
> val sw : java.io.StringWriter = new java.io.StringWriter( );
> e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> theParseResponseStr = theParseResponseStr + e.toString
> }
> }
> <div id="parseTree">{theParseResponseStr}</div>
> }
>
> def whatNode(termStr : String) = {
> theTerm = termStr
> theClientRequestStr = evalStr()
> var theParseResponseStr : String =
> ("failure: " + theClientRequestStr + "\n");
> try {
> theParseResponseStr =
> theREPL.showClientRequestParseTree(theClientRequestStr)
> println( "parsed : " + theParseResponseStr );
> //theREPL.readEvalPrint(theClientRequestStr)
> }
> catch {
> case e => {
> val sw : java.io.StringWriter = new java.io.StringWriter( );
> e.printStackTrace( new java.io.PrintWriter( sw, true ) );
> theParseResponseStr = theParseResponseStr + e.toString
> }
> }
> <div id="parseTree">{theParseResponseStr}</div>
> }
>
> def updateWhat(str: String): JsCmd = {
> println("updateWhat with " + str)
> JsCmds.SetHtml("parseTree", whatNode(str))
> }
>
> def show(xhtml: NodeSeq): NodeSeq = {
> <xml:group>
> <label for="whatField">Term :</label>
> { text("lambda x.x", (updateWhat _)) % ("size" -> "60") % ("id" ->
> "whatField") }
> { <button type="button">{?("Go")}</button> %
> ("onclick" -> ajaxCall(JsRaw("$('#whatField').attr('value')"), s =>
> updateWhat(s))) }
> <br/>
> <div id="parseTree">{whatNode(evalStr())}</div>
> </xml:group>
> }
> }
>
>
> --
> L.G. Meredith
> Managing Partner
> Biosimilarity LLC
> 1219 NW 83rd St
> Seattle, WA 98117
>
> +1 206.650.3740
>
> http://biosimilarity.blogspot.com
>
--
L.G. Meredith
Managing Partner
Biosimilarity LLC
1219 NW 83rd St
Seattle, WA 98117
+1 206.650.3740
http://biosimilarity.blogspot.com
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