I need a "slider" in a circle

[Todd Fabacher]

Hello Livecode group,

I have a situation where we need a slider, not a straight line, but as a
circle. I thing Scott Rossi did a demo of this at San Diego LC conference,
but I can't find the code samples to check. I just need to restrict the
movement to a circle when the user moves their finger. Maybe there is some
kind of dial example somewhere???

All I am looking to do is move the slider in the semi-circle to move the
value forward or backwards.

Thanks,

Todd