RFR: 8375070: NPE in Scene.ClickGenerator::preProcess when mouse button is none

[Andy Goryachev]

On Mon, 12 Jan 2026 22:07:16 GMT, Christopher Schnick <duke at openjdk.org> wrote:

> A straightforward fix to just include MouseButton.NONE in the click counter map in cases weird mouse button events are sent. Alternatively, these events could also be ignored/dropped at some point

The danger in such poorly understood cases is the risk of regression.  This code was written in 2012 (or probably even earlier) and might have worked fine since then (or might not, it's hard to say).
In order to analyze the change, we do need a reproducible code example or instructions how to reproduce, per
https://bugreport.java.com/bugreport/

[FAQ](https://bugreport.java.com/bugdatabase/faq)

[guide to submitting a bug report](https://docs.oracle.com/en/java/javase/21/troubleshoot/submit-bug-report.html#GUID-0074B0D4-7660-4542-9DD4-8E7C33637474)

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PR Comment: https://git.openjdk.org/jfx/pull/2034#issuecomment-3740874118