Struct HitSlop 

pub struct HitSlop {
    pub radius: f32,
    pub up_to: f32,
}

How far a miss may be re-attributed to a target, and up to what target size the offer stands.

radius is a hard ceiling in dp; up_to is the size a target is topped up towards. See the module docs for the formula and why a large node earns nothing.

Fields

radius: f32

The largest outset any node may earn, in dp. 0.0 disables the mechanism outright.

up_to: f32

The target size a node is topped up towards, in dp. A node already at least this big on its smaller axis earns no outset at all.

Implementations

impl HitSlop

pub const NONE: HitSlop

No slop at all — the mouse’s value, and what no_hit_slop resolves to.

pub fn for_pointer(kind: PointerKind, tokens: &InputTokens) -> Self

The density default for a pointer kind: the kind’s profile hit_slop, capped for a coarse pointer by InputTokens::slop_budget, topped up towards InputTokens::target_size.

A precise pointer (mouse, pen) never draws on the budget — its radius is already the tool’s, and the budget describes a contact patch it does not have. The mouse’s profile radius is 0.0, so this returns NONE for a mouse at every density.

pub fn is_none(&self) -> bool

Whether this slop can ever produce an outset.

pub fn outset_for(&self, size: Size) -> f32

The outset a node of size earns: ((up_to − min(w, h)) / 2).clamp(0, radius).

Zero for any node already at least up_to on its smaller axis, and zero for a degenerate (non-finite, negative) size.

Trait Implementations

impl Clone for HitSlop

fn clone(&self) -> HitSlop

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for HitSlop

impl Debug for HitSlop

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for HitSlop

fn eq(&self, other: &HitSlop) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for HitSlop