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/*
* Copyright 2007-2010 WorldWide Conferencing, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.liftweb {
package example {
package snippet {
import _root_.net.liftweb.example.model._
import _root_.scala.xml.{NodeSeq, Text, Group, Node}
import _root_.net.liftweb.http._
import _root_.net.liftweb.http.S
import _root_.net.liftweb.mapper._
import _root_.net.liftweb.http.S._
import _root_.net.liftweb.http.SHtml._
import _root_.net.liftweb.util.Helpers._
import _root_.net.liftweb.common._
import _root_.net.liftweb.util._
import _root_.scala.collection.mutable.HashMap
/**
* This session variable holds a set of Names and Integers, with a default value
* of 0 (zero)
*/
object CountHolder extends SessionVar[HashMap[String, Int]](new HashMap[String, Int] {
override def default(key: String): Int = 0
})
/**
* This snippet handles counting
*/
class Count {
/**
* This method is invoked by the <lift:Count /> tag
*/
def render(in: NodeSeq): NodeSeq = {
// get the attribute name (the name of the thing to count)
val attr: String = S.attr("name").openOr("N/A")
// Get the value from the session variable
val value = CountHolder.is(attr)
// Bind the incoming view data and the model data
bind("count", in, "value" -> value,
"incr" -> link("/count", () => CountHolder.is(attr) = value + 1, Text("++")),
"decr" -> link("/count", () => CountHolder.is(attr) = 0 max (value - 1), Text("--")))
}
}
}
}
}
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