Now keeping notes for todos and notes to help me work through problems. I'll keep notes for record keeping if/when I can be bothered.

todo Found an issue with bottom beam of 3rd/4th notes, last bar, 5th last line of rev etude (has stroke but no fill).

Working on controls that appear over the score with mouseover (currently bar for bar start/end).

Bar popup has the target bar and start/end toggle. Its DataContext is the ScoreEditVM (which has access to the UserToScore). UserToScore has current start/end bars.

There's only ever one bar popup in focus at the time. Could bind popup bar to ScoreEditVM CurrentBar and make IsStart/IsEnd, but that's getting messy.

Could create UserToScore DP in barpopup, bind it and call methods on UTS, but that subverts try/catches etc. I think the messiness above is required, but perhaps not in ScoreEditVM.

Process is:
Mouse moves over panel,
translate mouse coords to ScoreLine coords
find bar from coords (method in ScoreLine)
if (can/should show bar ui [ie not playing]), show it <---
on click, call set start bar with current bar [react to property change]

if (can/should show bar ui [ie not playing]), show it (mouseMovement when playing is ok, timer to hide ui)

IsPlaying comes from ScoreEditVM.
bool ScoreEditVM.ShowOverlayUI



on mouse leave etc similar.