Series<T> class sealed

A dataset drawn on a chart.

The hierarchy is sealed: donut and future series types join in later milestones without breaking changes. Series accept any element type T; for the built-in DataPoint, TimePoint and CategoryPoint types the accessors are inferred, and for domain models you pass them explicitly:

LineSeries(
  data: signups,
  xAccessor: (s) => s.day.toDouble(),
  yAccessor: (s) => s.count.toDouble(),
)
BarSeries(
  data: sales,
  categoryAccessor: (s) => s.region,
  yAccessor: (s) => s.revenue,
)

Implementers

• AreaSeries
• BarSeries
• DonutSeries
• LineSeries
• ScatterSeries

Properties

categoryAccessor → CategoryAccessor<T>?

Maps a datum to its category, for categorical (band) x axes. Inferred for CategoryPoint; null otherwise unless provided.

final

color → Color?

Explicit series color. When null the theme palette assigns one by position, in fixed order.

final

data → List<T>

The data to draw, in x order for line-like series.

final

downsampling → Downsampling

LTTB downsampling policy for line/area painting. Automatic by default: series beyond ~2× the plot width in points are reduced before painting, while hover/tooltips keep seeing the raw data.

final

hasCategoryAccessor → bool

Whether this series can resolve category labels.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

hasXAccessor → bool

Whether this series can resolve numeric x values.

no setter

id → String?

Stable identity for animation matching, emphasis targeting and color assignment across rebuilds. Defaults to the series' position in the series list.

final

interactive → bool

Whether this series participates in hover: crosshair snapping, hover markers and tooltips. Set false for purely decorative series (visual overlays, guides) so they never steal the crosshair or add tooltip rows. Painting is unaffected.

final

label → String?

Human-readable name, used by legends and tooltips.

final

pointIdAccessor → CategoryAccessor<T>?

Optional stable per-point identity for data-change morphing.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

xAccessor → ChartAccessor<T>?

Maps a datum to its numeric x (domain) value. Null for purely categorical data — such series render on a CategoryAxis (substituted automatically for default axes).

final

yAccessor → ChartAccessor<T>

Maps a datum to its y (measure) value.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

resolveCategoryPoints() → List<(String, double)>

Resolves data into (category, y) pairs for categorical x axes.

resolvePointIds() → List<String>?

Resolves per-point morph identities, or null when pointIdAccessor is not set.

resolvePoints() → List<Offset>

Resolves data through the numeric accessors into domain-space points (dx = x value, dy = y value).

resolveValues() → List<double>

Resolves data through yAccessor into plain magnitudes (used by radial series, where there is no x).

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited