How can I detect a drag for mobile devices?

[sschilling-artifact]

I am trying to detect when users drag the carousel from Android Chrome. Unfortunately, it doesn't look like any of the obvious event handlers get fired. The onClick/onMouseEnter events don't get fired as it isn't technically a click, but neither do onDrag or onScroll get fired when I drag the carousel to reveal the next image.

I've tried all of these handlers on the slider, tray, and slides themselves. Is there no way to detect when the user drags an image?