Enum RampHint 

pub enum RampHint {
    Sequential,
    Diverging,
    Banded {
        criterion: &'static str,
    },
    Categorical {
        items: Vec<CategoryItem>,
    },
}

How a variable’s values are meaningfully mapped to a colour scale (spec §6.1).

The only presentation vocabulary this layer contributes, and it is a shape statement, never a colour: an application chooses palettes, band edges, and legend styling; the engine says only which shape is truthful for the data.

Variants

Sequential

Magnitude on a continuous low→high scale.

Diverging

Signed values around a meaningful zero (e.g. flow direction).

Banded

Values classed against a criterion’s threshold bands (spec §7).

The criterion is named rather than left to the application to work out: a valuation holds several criteria, and matching them to variables by quantity is a guess — two criteria can share one, and two engines can publish a variable of the same name meaning different things. Guessing produced a drainage map offered a threshold scale annotated with water-distribution numbers.

Fields

criterion: &'static str

Key of the criterion (spec §7.1) whose valuation supplies the thresholds. Must exist in the same engine’s criteria catalog and carry severities.

Categorical

A closed set of discrete states, with engine-authored items.

Fields

items: Vec<CategoryItem>

Trait Implementations

impl Clone for RampHint

fn clone(&self) -> RampHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RampHint

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

Formats the value using the given formatter.

impl Deserialize<'static> for RampHint

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'static>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for RampHint

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for RampHint

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for RampHint