On Fri, 12 Feb 2021 21:43:56 GMT, Olga Mikhaltsova <omikhaltc...@openjdk.org> wrote:
>> Please, review this small fix for drag-n-drop on Linux with HiDPI turned on! >> >> This bug is due to the following reason: while scaling Java recalculates >> resolution (W x H) according to sun.java2d.uiScale (W/SCALE x H/SCALE) and >> works inside these new coordinates but at the same time the events, that >> come from the system, continue reporting positions in the old coordinates (W >> x H). >> >> The idea of the suggested fix is in division of coordinates on the scale >> when they come from the system to Java and multiplying them on the scale >> when they go back from Java to the system. It is similar to processing >> events from mouse and buttons. >> >> Testing is quite complicated because for reproducing this bug the following >> conditions should be met: >> 1. HiDPI is turned on >> 2. sun.java2d.uiScale.enabled = true and sun.java2d.uiScale != 100% >> 3. the source of drag-n-drop is non-java application >> >> The step-by-step guide how to reproduce this bug is added to >> https://bugs.openjdk.java.net/browse/JDK-8257414. > > Olga Mikhaltsova has updated the pull request incrementally with one > additional commit since the last revision: > > 8257414: Drag n Drop target area is wrong on high DPI systems Marked as reviewed by serb (Reviewer). ------------- PR: https://git.openjdk.java.net/jdk/pull/1907
