Setting the Scrollbar Thumb size

Question

I am attempting to work out the algorithm associated with sizing of the WPF Scrollbar thumb element.

The thumb element can be sized using the Scrollbar.ViewportSi

Answer 1

If you're looking for how to set a minimum height for the scrollbar thumb:

From Ian (da real MVP) here:

scrollBar1.Track.ViewportSize = double.NaN;  
scrollBar1.Track.Thumb.Height = Math.Max(minThumbHeight, DataScrollBar.Track.Thumb.ActualHeight);

Or you know, add 100+ lines of xaml code cause omgDATABINDING!!1!