Know Swing?

I have a challenge.

I made this huge swing component provider (is-not a component but has-a), i’d i like to eliminate a limitation i had to introduce for the centered view port layout i made (at the bottom).
The limitation is this: i had to disable scrollRectToVisible in the WrappedList so that the view didn’t jump around when selecting a cell and it scrolled to it (this disabled the selection). It’s strange that (apparently) it’s not the LayoutManager that is making these adjustments.

SO. How can i fix scrollRectToVisible so it doesn’t jump like crazy?

(Jump is the cells are left aligned at first, then get center aligned, like my layoutmanager tell them to).

The code has more than 10000 characters so i will post the file… FOR THE BRAVE.