Struct StyleEvalContextFull 

pub struct StyleEvalContextFull<'a> {
    pub zoom: f32,
    pub feature_state: &'a FeatureState,
}

Extended evaluation context that carries per-feature mutable state alongside the current zoom level.

This is used when paint/layout values may depend on feature-state keys such as "hover" or "selected". The lifetime 'a borrows the feature-state map owned by MapState.

Example

let ctx = StyleEvalContext::new(14.0)
    .with_feature_state(&feature_state);
let color = fill_color.evaluate_with_full_context(&ctx);

Fields

zoom: f32

Current map zoom level.

feature_state: &'a FeatureState

Per-feature mutable state (e.g. {"hover": true, "selected": false}).

Implementations

impl<'a> StyleEvalContextFull<'a>

pub fn new(zoom: f32, feature_state: &'a FeatureState) -> Self

Create a full evaluation context.

pub fn to_base(&self) -> StyleEvalContext

Downgrade to a zoom-only context (discards feature-state).

pub fn get_feature_state(&self, key: &str) -> Option<&PropertyValue>

Look up a feature-state key, returning None if the key is absent.

pub fn feature_state_bool(&self, key: &str) -> bool

Look up a feature-state key as a boolean, defaulting to false.

pub fn feature_state_f64(&self, key: &str, default: f64) -> f64

Look up a feature-state key as an f64, returning a default when absent.

Trait Implementations

impl<'a> Clone for StyleEvalContextFull<'a>

fn clone(&self) -> StyleEvalContextFull<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for StyleEvalContextFull<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for StyleEvalContextFull<'a>

fn eq(&self, other: &StyleEvalContextFull<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> Copy for StyleEvalContextFull<'a>

impl<'a> StructuralPartialEq for StyleEvalContextFull<'a>