--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab.Fx/AnimationHelpers.cs	Tue Sep 17 04:27:30 2013 +0400
@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+using System.Diagnostics;
+
+namespace Implab.Fx
+{
+    public static class AnimationHelpers
+    {
+        public static Animation<TTarget> AnimateProperty<TTarget,TVal>(this Animation<TTarget> animation, Action<TTarget,TVal> setter, Func<TTarget,TVal> getter, TVal newValue, Func<TVal,TVal,int,int,TVal> fx) where TTarget: class
+        {
+            if (animation == null)
+                throw new ArgumentNullException("animation");
+
+            TVal oldValue = getter(animation.Traget);
+
+            animation.Step += (target, elaped, duration) =>
+            {
+                var value = fx(oldValue, newValue, elaped, duration);
+                setter(target, value);
+            };
+
+            return animation;
+        }
+
+        public static Animation<Form> AnimateTransparency(this Form ctl, float newValue)
+        {
+            var anim = new Animation<Form>(ctl);
+
+            anim.AnimateProperty(
+                (target, value) => target.Opacity = value,
+                target => target.Opacity,
+                newValue,
+                (ov, nv, el, du) => ov + ((float)el / du) * (nv - ov)
+            );
+            return anim;
+        }
+    }
+}