Allow mouse wheel tilt (left/right) to scroll timeline#6052
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jonoomph
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May 24, 2026
jonoomph
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- Restored horizontal timeline scrolling via mouse-wheel tilt by handling angleDelta().x() / pixelDelta().x() in wheelEvent() and routing that input through the existing deferred horizontal scroll accumulator/timer path. This allows left/right wheel tilt to scroll without requiring Shift.
- Kept existing Shift + wheel behavior intact (still mapped to horizontal scrolling using Y delta).
- Extended timeline helper wheel-event stubs to support X-axis deltas, enabling regression tests for tilt input in unit tests.
- Added a regression test that verifies horizontal scroll occurs from tilt-wheel input with no modifier keys.
- Restored horizontal timeline scrolling via mouse-wheel tilt by handling angleDelta().x() / pixelDelta().x() in wheelEvent() and routing that input through the existing deferred horizontal scroll accumulator/timer path. This allows left/right wheel tilt to scroll without requiring Shift. - Kept existing Shift + wheel behavior intact (still mapped to horizontal scrolling using Y delta). - Extended timeline helper wheel-event stubs to support X-axis deltas, enabling regression tests for tilt input in unit tests. - Added a regression test that verifies horizontal scroll occurs from tilt-wheel input with no modifier keys.
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