Why are the public variables passed in with the constructor in the GetWeatherEvent class below? Thanks
package com.wiley.proflex2.chapter21.events
{
import com.adobe.cairngorm.control.CairngormEvent;
import com.wiley.proflex2.chapter21.control.ApplicationCo ntroller;

public class GetWeatherEvent extends CairngormEvent
{
public function GetWeatherEvent(locationId:String, unit:String)
{
super( ApplicationController.EVENT_GET_WEATHER );
this.locationId = locationId;
this.unit = unit;
}

public var locationId : String;
public var unit : String;
}
}

Well ideally you could create private variables and pass them into the constructor or leave them public and take them out of the constructor. There is no specific reason for it just easier to do it on one line of code :)

Thanks. My first Flex app is a Cairngorm application and I wanted to make sure that this was just done for convenience.

In that same passage, why refer to the FrontController to get the event type? super( ApplicationController.EVENT_GET_WEATHER) seems to be referring to the EVENT_GET_WEATHER_BY_LOCATION const in the code example Listing 21-8. Shouldn't this string instead be defined in the event class itself, something like:

public static var EVENT_GET_WEATHER_BY_LOCATION:String = "getWeatherByLocation";