I got excited when I saw that there is a single finger swipe gesture, so I made a brightness button to open a touch bar group and put single swipe gestures in it to increase and decrease brightness. Got me pretty close to reproducing the system brightness slider (where dragging from the button goes straight to adjusting brightness), but then when I tried to do the same for volume, realized that the swipes are active globally, and not just when the groups they are in are open.
Shouldn't they be active only when the group they are in is shown? Is there a way to do that?
Side note: Single finger swipes also override any slider controls. Might be useful to prevent that?