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fix: exposure wheel only increased when Alt held
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Qt xcb/windows swap wheel axes while Alt is held, so angleDelta().y() is 0
and copysign(_, 0) is always positive. Fall back to angleDelta().x() and
ignore genuine zero deltas.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
duan_j
2026-08-13 10:39:36 +02:00
co-authored by Claude Fable 5
parent 69178945e5
commit ac5936f7be
1 changed files with 7 additions and 1 deletions
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src/aare/gui/widgets/camera_image.py
+7 -1
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@@ -1354,7 +1354,13 @@ class SampleCameraImageLabel(QGraphicsView):
def wheelEvent(self, event: QWheelEvent):
if not self.wheel_event_timer.isActive():
delta_y = event.angleDelta().y()
# Qt's xcb/windows platform plugins swap wheel axes while Alt is held,
# so a vertical scroll lands in angleDelta().x() and y() is 0. Without
# this fallback, copysign(_, 0) is always positive and Alt+wheel
# exposure can only ever increase.
delta_y = event.angleDelta().y() or event.angleDelta().x()
if delta_y == 0:
return
match self._state:
case SampleCameraImageState.BEAM_MARKING:
if event.modifiers() & Qt.KeyboardModifier.AltModifier: