fn key_button(
ui: &mut Ui,
a: &mut Animated,
t: f64,
palette: &Palette,
g: &mut Gesture,
at: (u64, usize, usize),
)Expand description
Diamond keyframe toggle for one parameter at the playhead; right-click clears every key. at only has
to be unique inside the strip — the mixer edits a fresh clone of the bus list every frame, so an
id derived from the Animated’s address (crate::ui::key_buttons) would not survive a click.