Struct DataContext 

pub struct DataContext {
    pub fields: BTreeMap<String, String>,
    pub arrays: BTreeMap<String, Vec<String>>,
}

Named data fields and ordered array columns available at scene-compile time.

fields holds scalar bindings keyed by dot-separated path (e.g. "revenue.total"). arrays holds ordered sequences of raw element strings keyed by name (e.g. "sales" → ["12", "18", "15"]), populated from JSON array values and CSV column columns.

Both maps use BTreeMap for deterministic iteration order on the render path. No HashMap, no randomness, no time.

Fields

fields: BTreeMap<String, String>

Scalar field map. Keyed by dotted path, value is the raw string.

arrays: BTreeMap<String, Vec<String>>

Array column map. Keyed by name, value is the ordered raw element strings.

Implementations

impl DataContext

pub fn get(&self, path: &str) -> Option<&str>

Look up a scalar field value by path.

Returns None when the path is not present in this context.

pub fn get_array(&self, key: &str) -> Option<&[String]>

Look up an ordered array column by key.

Returns the element slice in source order, or None when the key is not present. Used by the data-binding pre-pass to populate ChartSeries.values from a data-ref binding.

Trait Implementations

impl Clone for DataContext

fn clone(&self) -> DataContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataContext

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

Formats the value using the given formatter.

impl Default for DataContext

fn default() -> DataContext

Returns the “default value” for a type.