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). ------------- Commit messages: - fix Changes: https://git.openjdk.org/jfx/pull/2282/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2282&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8391309 Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jfx/pull/2282.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2282/head:pull/2282 PR: https://git.openjdk.org/jfx/pull/2282
