Minor improvements to new Usages preview panel (NB24)

[jjazzboss]

Description

Attached image is what I get with Usages. I can't read the beginning of left panel so each time (except if the first usage line found is short) I have to scroll on the left.

Use case/motivation

Scrollbar of the left panel should be forced to the left.
Horizontal split position between left/right usage panels should be saved and reused for next Usages.

Related issues

No response

Are you willing to submit a pull request?

No

[mbien]

this is behavior is shared between all trees. The scrollpane will try to keep the node in the viewport if the selection changes.

The reason why it is more noticeable in the usages window is likely because the nodes can contain longer lines, this pretty much guarantees that the viewport moves if the selection changes.

I can reproduce the same behavior in the projects tree or refactoring preview window etc. I am sure we can come up with something but we have to be careful to not introduce other bugs.

[jjazzboss]

If it's easier, just saving the split position and reuse it could be another way to solve this. It might seem a minor thing, but doing 30 times scroll+move split bar is really irritating at the end...

[mbien]

yeah, UI persistence for the find-usages splitter needs to be implemented. The search results window #7779 does have it but we overlooked it for find-usages #7694.

[mbien]

@jjazzboss implemented the tree navigation change in #8089, dev-build for testing purposes is here: https://github.com/apache/netbeans/actions/runs/12474234603/artifacts/2357632475