Implementing a 90 degree and 180 degree arc slider?

[vicc]

This is really useful, thank you so much! I was wondering if you could do a quick update for a 90 degree arc. I really only need a quarter circle slider.

Is there a quick way to do this? Thanks!

I changed the circularTrack angle values to (track, self.minimumValue, self.maximumValue, 0, M_PI/2); which helped but the gestures are all messed up :/

[toseefkhilji]

Any Update on this?