DarkRoom

White balance, highlights and shadows, and the mixer took a press, jumped once,
and went dead under the finger. Exposure and contrast dragged perfectly — which
is what made it read as a slider bug rather than a layout one.

The panel nested. A group's head row drew the *whole* group, repeating over
`row.group-len` and indexing back into `root.rows`; every other row drew
nothing. So the inner repeater's model was read off the head row, and depended
on that row's identity. Moving any parameter in the group rewrites that row —
its own value changed, or `group-modified` flipped for its neighbours —
which re-evaluated the repeater, rebuilt its items, and destroyed the
`TouchArea` holding the live gesture. A lone parameter had no inner repeater,
so the five single-parameter operations were never affected.

Now each row draws only itself, so an update touches one control and nothing
structural. The facet heading comes off `starts-facet`, which Rust already
marks on the first row of a run, and the group heading is drawn by the row that
heads it. It also retires the old hazard of a head row building every control
in its group — thirty-six live TouchAreas behind the mixer's twelve visible
ones.

The same identity hazard reached the rows themselves through `ModelRc`, which
compares by identity rather than contents: a fresh empty model per row per call
made every row differ from itself, so `sync_rows` rewrote all of them on every
event. `points` now shares one empty model as `choices` already did.

Both are held by tests, because the failure is invisible in a still — every
value is right and the panel looks perfect. Curve rows are excluded: their
points model carries live coordinates, is rebuilt by design, and `sync_rows`
writes values through the existing model rather than swapping it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

2026-08-17 07:23:01 +02:00

activity.rs

Say what the application is doing, in one bar and one list

2026-08-16 18:32:09 +02:00

collections_ui.rs

Say what the application is doing, in one bar and one list

2026-08-16 18:32:09 +02:00

derived_sync.rs

Run the formatter over the shard-naming change

2026-08-16 22:29:28 +02:00

develop.rs

Let a grouped slider be dragged, by flattening the panel that drew it