Touchpad scrolling in GTK apps is not kinetic/inertial

[valpackett]

I can't believe there's no issue for this yet..

And I just found the culprit: GTK doesn't do the kinetic thing if you send a wl_pointer.frame in between the wl_pointer.axis_stops!!

Silly workaround:

--- i/types/seat/wlr_seat_pointer.c
+++ w/types/seat/wlr_seat_pointer.c
@@ -264,10 +264,12 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
 
 			wl_pointer_send_axis(resource, time, orientation,
 				wl_fixed_from_double(value));
+			pointer_send_frame(resource);
 		} else if (version >= WL_POINTER_AXIS_STOP_SINCE_VERSION) {
 			wl_pointer_send_axis_stop(resource, time, orientation);
+			if (orientation > 0)
+				pointer_send_frame(resource);
 		}
-		pointer_send_frame(resource);
 	}
 }

I'm not sure what would be the "beautiful" code to solve this. Weston just explicitly handles horizontal and vertical in the same function instead of having an orientation parameter.

[emersion]

wl_pointer.frame handling should be reworked. Maybe we could use an idle event source to send the event after all other pointer events?

[emersion]

Anyway, thanks for finding this, it's helpful. :)