Scroll effect with collapsing sections of the screen.

I'm looking for help on how to do this effect:

On a page is a ListView that is 3cm from the top of the page, below a 3cm tall logo. When the user scrolls up the list view, the entire list view scrolls up to take up the 1/2 the space of the logo. Reverse when going down. So basically the Logo gets it's size allocation reduced. Both the logo and the listview can be in a scroll view, but how do I resize the logo