Dispatch an event when config values change.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4603 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/util/Config.as

@@ -22,11 +22,12 @@
 package com.threerings.util {
 
 import flash.events.NetStatusEvent;
+import flash.events.EventDispatcher;
 
 import flash.net.SharedObject;
 import flash.net.SharedObjectFlushStatus;
 
-public class Config
+public class Config extends EventDispatcher
 {
     /**
      * Constructs a new config object which will obtain configuration
@@ -53,6 +54,9 @@ public class Config
     {
         _so.data[name] = value;
         _so.flush(); // flushing is not strictly necessary
+
+        // dispatch an event corresponding
+        dispatchEvent(new ConfigValueSetEvent(name, value));
     }
 
     /**

src/as/com/threerings/util/ConfigValueSetEvent.as

@@ -0,0 +1,34 @@
+package com.threerings.util {
+
+import flash.events.Event;
+
+/**
+ * Dispatched whenever a config value is changed.
+ */
+public class ConfigValueSetEvent extends Event
+{
+    /** The type of a ConfigValueSetEvent. */
+    public static const TYPE :String = "ConfigValSet";
+
+    /** The name of the config value set. */
+    public var name :String;
+
+    /** The new value. */
+    public var value :Object;
+
+    /**
+     */
+    public function ConfigValueSetEvent (name :String, value :Object)
+    {
+        super(TYPE);
+
+        this.name = name;
+        this.value = value;
+    }
+
+    override public function clone () :Event
+    {
+        return new ConfigValueSetEvent(name, value);
+    }
+}
+}