Struct ChartAggregate 

pub struct ChartAggregate<T: 'static> { /* private fields */ }

A bucket/rollup projection over a ChartModel<T>.

See the module documentation for semantics.

Implementations

impl<T: Clone + 'static> ChartAggregate<T>

pub fn new( source: ChartModel<T>, bucket_size: usize, aggregate_fn: ChartAggregateFn, ) -> Self

Wrap source, bucketing every series into groups of bucket_size source points reduced via aggregate_fn. bucket_size is clamped to a minimum of 1.

pub fn set_bucket_size(&self, bucket_size: usize)

Change the bucket size, rebuilding every series and emitting ChartChange::Reset. Clamped to a minimum of 1.

pub fn set_aggregate_fn(&self, aggregate_fn: ChartAggregateFn)

Change the aggregate reduction, rebuilding every series and emitting ChartChange::Reset.

impl<T: 'static> ChartAggregate<T>

pub fn bucket_size(&self) -> usize

The configured bucket size.

pub fn series_count(&self) -> usize

Number of series (same set as the source).

pub fn series_ids(&self) -> Vec<SeriesId>

The series ids, in the source’s display order.

pub fn point_count(&self, series: SeriesId) -> usize

Number of buckets currently materialized for series.

pub fn with_series<R>( &self, series: SeriesId, f: impl FnOnce(&str, Option<&ColorProp>, bool) -> R, ) -> Option<R>

Access a series’ metadata (delegates straight through to the source). Returns None if series is unknown.

pub fn with_point<R>( &self, series: SeriesId, index: usize, f: impl FnOnce(&ChartDatum<T>) -> R, ) -> Option<R>

Access the bucket at index within series. Returns None if series or index is unknown.

pub fn observe_changes( &self, f: impl Fn(&ChartChange) + 'static, ) -> ObserverHandle

Register an observer for translated bucket changes. Returns an ObserverHandle — dropping it removes the callback.

pub fn first_changed_index(&self, series: SeriesId) -> Option<usize>

First bucket index of series whose content may differ since the latest translated change. None if series is unknown or unaffected yet.

Trait Implementations

impl<T: 'static> Clone for ChartAggregate<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: 'static> Debug for ChartAggregate<T>

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

Formats the value using the given formatter.