RFR: 8306447: Adding an element to a long existing list may cause the first visible element to jump

[Andy Goryachev]

On Wed, 19 Apr 2023 13:13:45 GMT, Johan Vos <jvos at openjdk.org> wrote:

> Calculate position of first visible element before propagating changes.
> Make sure to restore the position of said element after the changes are done.
> 
> Fix JDK-8306447

When testing with the MonkeyTester https://github.com/openjdk/jfx/pull/1097 , noticed that the view position still jumps when adding an item if the list is scrolled to somewhere in the middle, see the attached video clip.


https://user-images.githubusercontent.com/107069028/234082728-e8a0a201-3038-4175-a6d0-6fe80b07d7be.mp4


Could I be missing something?

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PR Comment: https://git.openjdk.org/jfx/pull/1099#issuecomment-1520629072