On Wed, 13 Oct 2021 10:52:40 GMT, Fabian Wolter <d...@openjdk.java.net> wrote:
> There are sometimes multitouch events detected, when only a single touch > should be detected under certain conditions. This lead to touch events on > previous touch positions. > > The referenced bug is closed with "won't fix" with the justification it would > be platform specific. But this is not correct. It affects all Linux platforms > combined with a touch controller, which sends the touch events in an > uncommon, but valid(!), order. > > We encountered this problem with the touch controller ILI2511 with firmware > V6000_V1 in the Tianma display TM070JVHG33. This patch fixes the problem. It > is the same patch attached to above bug report. The 8087370 includes [LinuxStatefulMultiTouchProcessor-fix-for-1.patch](https://bugs.openjdk.java.net/secure/attachment/50236/LinuxStatefulMultiTouchProcessor-fix-for-1.patch) to fix the first described case: 1. Consider you're touching the screen with two fingers, for example coordinates of one point is ~100,100 and second point is ~200,200. While still touching around the same points some events are reported with one or another point to be either 100,200 or 200,100. Is it reproduced on your system as well? It relates to `8282104: Node zoom/rotate flickers on Raspberry Pi with Touchscreen` with fix #737 which suggests to not take LinuxInput.ABS_X/Y events into account for non zero slots instead just skipping them for all slots. ------------- PR: https://git.openjdk.java.net/jfx/pull/641
