private int getProgressForAngle(double angle) {
		int touchProgress = (int) Math.round(valuePerDegree() * angle);

		touchProgress = (touchProgress < 0) ? INVALID_PROGRESS_VALUE
				: touchProgress;
		touchProgress = (touchProgress > mMax) ? INVALID_PROGRESS_VALUE
				: touchProgress;
		return touchProgress;
	}
Notification that the user has finished a touch gesture. Clients may
want to use this to re-enable advancing the seekarc.

@param seekArc
           The SeekArc in which the touch gesture began
SeekArc_library/src/com/triggertrap/seekarc/SeekArc.java