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

Sat Apr 29 20:06:23 UTC 2023

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 #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.
> 
>  2024-0424-adding-element.mp4 
> Could I be missing something?

Not sure I understand this scenario, but I extended the existing test and fixed a case where the index/offset might change when the cellcount changes.

-------------

PR Comment: https://git.openjdk.org/jfx/pull/1099#issuecomment-1528859922