store selected table item index when switching library features

[ronso0]

scenario:
* listen to tracks from Tracks view
* find a track that inspires you to start a new playlist
* right-click any other library feature like Playlists or Crates
 (for example to create or rename a playlist/crate)*
= tracks table switches to respective library feature
(damn! lp:1810810)
* go back to Tracks
= table shows correcct scroll position
* use [Library],ScrollVertical,+-1
= scroll position jumps to top of the list

master (2.3) 2018-12-14

[Daniel Schürmann (daschuer)]

I cannot confirm this with the current master using mouse.
After creating a new carte and than clicking back on the Track tree icon, the scrol bar search and highlighting are back.
Any idea what else can I do to reproduce the issue.

[ronso0 (ronso0)]

hmm the main issue here seems to be that my mouse makes the current not-yet-focused table view jump ~20 lines up as soon as I use the mouse scroll wheel; I noticed this behaviour in other apps, as well.

The second issue is that the track selection is gone (while the scroll position is kept) when I focus the table again via controller or Tab key. If I press Up/Down keys or scroll with controller encoder, the first track is selected which makes the scroll position jump to the top.

I think I'll split this one into multiple bugs.
The tracks table losing focus when I just want to rename (not view) a playlist/crate or create a new on is annoying, because I'll have to scroll up in tree view to get back to Tracks, for example.

[ronso0 (ronso0)]

I updated the report, it now just describes the scroll position jump when using a controller.

The other aspect of this is in lp:1810810

[Daniel Schürmann (daschuer)]

I can confirm this. I t happens also if you use the up and down keys on keyboard.

[ronso0 (ronso0)]

the reason seems to be that the first table cell is somehow focused and the selection jumps there when keys or selection controls attempt to move it.

noticed with https://bugs.launchpad.net/mixxx/+bug/1808632
" can't focus tracks table item if there is only one "

I'm trying to save/restore also the selection focus it when re-activating a library view.
this wouldn work if multiple rows are selected, but I guess that's okay.

[Daniel Schürmann (daschuer)]

It this fixed now or in progress by one of the related PRs?

[ronso0 (ronso0)]

stalled.
https://github.com/mixxxdj/mixxx/pull/2378

[ronso0 (ronso0)]

superseded by poelzi's https://github.com/mixxxdj/mixxx/pull/3063

[ronso0 (ronso0)]

PR with library selection commits of #3063
https://github.com/mixxxdj/mixxx/pull/4177

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/9547