pub const HIT_BAND_SLACK: f32 = 2.0;Expand description
Grab tolerance added to every stroke band’s half-width, in local coordinates.
A rendered one-pixel connector is not a one-pixel target: this is what
makes a thin stroke clickable without pixel-perfect aim, and it is the same
2.0 the per-segment hit-test carried before ItemShape existed. It is
not the pointer-kind allowance — a coarse pointer earns more, from the
view’s separate miss-only slop pass.