fix: Flicker when scrolling virtualizer in and out of view#9902
Merged
devongovett merged 1 commit intomainfrom Apr 10, 2026
Merged
fix: Flicker when scrolling virtualizer in and out of view#9902devongovett merged 1 commit intomainfrom
devongovett merged 1 commit intomainfrom
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reidbarber
approved these changes
Apr 9, 2026
snowystinger
approved these changes
Apr 10, 2026
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Noticed on staging docs that if you scroll past the List layout example and then back up, some of the items flicker in and out of view. This is due to a logic error in ListLayout. We adjust the visible rectangle to try to keep the number of visible rows consistent by rounding the y position and height. But when we adjust the y position, we also need to add the adjusted difference to the height to ensure the rectangle still covers the originally requested region.
Also noticed that scrollview was continuously emitting updates for virtualizer that were entirely out of view, so I've prevented that as well (should be just an optimization).
Test instructions
Open the PR build for virtualizer docs. Scroll past the list layout example and back up and down a few times and verify that there is no flickering.