mirrors/wlroots
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/wlroots/wlroots.git synced 2025-10-29 05:40:12 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

pointer: transform low-res to high-res axis events

Browse source 
Currently, the "wlr_event_pointer_axis" event stores low-resolution
values in its "delta_discrete" field. Low-resolution values are always
multiples of one, i.e., 1 for one wheel detent, 2 for two wheel
detents, etc.

In order to simplify internal handling of events, always transform in
the backend from the low-resolution value into the high-resolution
value.

The transformation is performed by multiplying by 120. The 120 magic
number is used by the kernel and it is exposed to clients in the
"WLR_POINTER_AXIS_DISCRETE_STEP" constant.
This commit is contained in:
José Expósito 2022-02-25 17:30:31 +01:00
parent c84cc660f0
commit 65c436407f
4 changed files with 5 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

1
backend/libinput/pointer.c
View file

@ -116,6 +116,7 @@ void handle_pointer_axis(struct libinput_event *event,
libinput_event_pointer_get_axis_value(pevent, axes[i]);
wlr_event.delta_discrete =
libinput_event_pointer_get_axis_value_discrete(pevent, axes[i]);
wlr_event.delta_discrete *= WLR_POINTER_AXIS_DISCRETE_STEP;
wlr_signal_emit_safe(&pointer->events.axis, &wlr_event);
}
}