fix(QScrollArea): prevent content re-rendering on scroll or mousemove (fix #16579) #17041
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What kind of change does this PR introduce?
Does this PR introduce a breaking change?
The PR fulfills these requirements:
dev
branch (orv[X]
branch)fix: #xxx[,#xxx]
, where "xxx" is the issue number)Other information:
After separating out the thumb rendering logic into a separate component we can isolate the rendering when scroll position is updated or thumb is shown/hidden.
The HTML and CSS output remains unchanged. The functionality remains unchanged. UI tests under ui/dev (ui/playground) all appear to be functioning as expected.
Before the change
After the change
This would fix #16579