Silverlight: GridSplitter with a collapse button (V2)

This is a continuation of my last post.
I have made a better version of my ExtendedGridSplitter, this one works in both horizontal and vertical placement, I have made it more reliable and easy to work with.

Plus… I have found this post about animating Grid columns & rows and implemented it in my sample application.

Demo is here
Source is here

Silverlight: GridSplitter with a collapse button

(Silverlight is much more hard-to-handle then Flex)

This is my first blog about Silverlight !!

Not much to explain here, just look at the code and ask questions.
I have added a button to the GridSplitter by sub-classing it.
Then later I used templates, styles and events to give the collapse button its look and functionality.
Of course you can make everything look better by applying styles (my collapse button is a simple red rectangle).

By handling some simple events I control the collapsing and expanding.
Notice that while dragging the splitter to the far left the button will change its arrow direction.

That was a good lesson.

Demo is here
Source is here

update: i have made a better version of this, look here.