On Thu, 27 Aug 2026 22:03:53 GMT, Michael Strauß <[email protected]> wrote:
> For the longest time, I've had the impression that scrolling in JavaFX is not > quite right. Looking at it, that suspicion is quickly confirmed: the scroll > distance is incorrectly divided by the render scale. > > To reproduce, open MonkeyTester and scroll a ListView. On Windows 11 with a > system setting of 3 lines per detent, the ListView scrolls exactly 3 lines at > 100% render scale, 2 lines at 150% render scale, and 1.5 lines at 200% render > scale. > > The render scale conversion was introduced in 2015 when High-DPI support was > added. However, mouse wheel rotation is a dimensionless number, it shouldn't > be scaled at all. A line is a line, no matter the render scale. > > --------- > - [x] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai). This pull request has now been integrated. Changeset: 4fa69af0 Author: Michael Strauß <[email protected]> URL: https://git.openjdk.org/jfx/commit/4fa69af0a79421a947c086b8a69e2665f153cba0 Stats: 147 lines in 3 files changed: 143 ins; 0 del; 4 mod 8391309: Mouse-wheel scroll distance incorrectly depends on render scale Reviewed-by: mhanl, angorya, lkostyra ------------- PR: https://git.openjdk.org/jfx/pull/2282
