Windows `list-box%` scrolling stops
Nobody has claimed this yet.
- Dominant language
- Racket
- Stars
- 68
- Forks
- 82
- PR merge metrics
- No merged PRs in 30d
Description
On Windows a list-box% scrolling stops when the control attempts to make the Nth item the top item when there are N items visible. I've tracked it down to this line https://github.com/racket/gui/blob/master/gui-lib/mred/private/wx/win32/list-box.rkt#L414 . I'm not sure what the ramifications are for removing it, but I think that would fix it.
I found this when the Package Manager view in DrRacket had 24 items visible and with the default scroll size of 3, the list-box% would not scroll past the 21st item.
Cheers,
Sam
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at gui-lib/mred/private/wx/win32/list-box.rkt:414 and reproduce the Windows list-box scrolling behavior described in the Package Manager view. Check the case where the number of visible items equals the target top item, including the default scroll size of 3. Done means list-box% can scroll past the 21st item in the reported 24-item view without breaking other scrolling behavior.
Written by the indexing model from the issue text.
Assessment
- Domain
- desktop
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100