Swipe to Spin camera

I have a camera in my scene that I want to be able to swipe to spin the camera 360 degrees to look around my scene. I am having trouble getting a blueprint to allow for a smooth spinning motion as well as a good blueprint to use touch. I have found some tutorials to turn a camera, but it always results in very sharp movements. I want to be able to swipe, and have the camera spin and come to a stop. Does anyone know of a good blueprint example where I could create that?

See here: Unreal Engine Livestream - Touch Input - August 8 - Live from HQ - Events - Unreal Engine Forums

The project can be downloaded.