Moved this general-purpose flash/mx class here, from the msoy project.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4190 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/as/com/threerings/mx/effects/FunctionEffect.as

@@ -0,0 +1,31 @@
+package com.threerings.mx.effects {
+
+import mx.effects.EffectInstance;
+import mx.effects.Effect;
+
+public class FunctionEffect extends Effect
+{
+    /** The function to call. */
+    public var func :Function;
+
+    /** The arguments to pass to the function. */
+    public var args :Array;
+
+    public function FunctionEffect (target :Object = null)
+    {
+        super(target);
+
+        instanceClass = FunctionEffectInstance;
+    }
+
+    // documentation inherited
+    override protected function initInstance (instance :EffectInstance) :void
+    {
+        super.initInstance(instance);
+
+        var fe :FunctionEffectInstance = (instance as FunctionEffectInstance);
+        fe.func = func;
+        fe.args = args;
+    }
+}
+}

src/as/com/threerings/mx/effects/FunctionEffectInstance.as

@@ -0,0 +1,29 @@
+package com.threerings.mx.effects {
+
+import mx.effects.effectClasses.ActionEffectInstance;
+
+public class FunctionEffectInstance extends ActionEffectInstance
+{
+    public function FunctionEffectInstance (target :Object)
+    {
+        super(target);
+    }
+
+    /** The function to call. */
+    public var func :Function;
+
+    /** The args to pass. */
+    public var args :Array;
+
+    override public function play () :void
+    {
+        super.play();
+
+        // call the function!
+        func.apply(null, args);
+
+        // and we're done
+        finishRepeat();
+    }
+}
+}