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input: emulate cursor axis for tablet tool mouse

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We only have to deal with non-high-res mouses, so we can
emulate it even without having delta_discrete being
exposed by wlroots.
This commit is contained in:
Jens Peters 2025-06-06 07:14:38 +02:00 • committed by Hiroaki Yamamoto
parent 8584e073de
commit 33fc1c6d05
1 changed files with 15 additions and 0 deletions
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15
src/input/tablet.c
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@ -439,6 +439,21 @@ handle_tablet_tool_axis(struct wl_listener *listener, void *data)
break;
}
}
if (ev->updated_axes & WLR_TABLET_TOOL_AXIS_WHEEL) {
/*
* libinput reports delta_discrete for tablet tool mouses,
* but unfortunately wlroots doesn't expose it. That said,
* based on the libinput source (tablet_device_has_axis()),
* we only have to deal with non-high-res mouses here, so
* it is relatively safe to set a fixed value.
*/
int delta_discrete = tablet->wheel_delta >= 0 ? 1 : -1;
cursor_emulate_axis(tablet->seat, &ev->tablet->base,
WL_POINTER_AXIS_VERTICAL_SCROLL,
tablet->wheel_delta,
WLR_POINTER_AXIS_DISCRETE_STEP * delta_discrete,
WL_POINTER_AXIS_SOURCE_WHEEL, ev->time_msec);
}
}
}