LineChartData class

Complete data for rendering a line chart (single or multi-series).

The X axis supports two modes:

• Numeric mode (default): omit xLabels and the chart auto-generates numeric tick labels from minX–maxX.
• Categorical mode: provide xLabels and the chart renders them as evenly spaced string labels. Points are still positioned by LinePoint.x.

Legend. Pass legend entries explicitly, or leave it empty to auto-derive entries from the series list. With multiple series (point + function combined), the auto-derived legend contributes one entry per series using its name and color; with one or zero series, no auto-derived legend is rendered. See ChartLegendEntries.fromLineChartData to obtain the auto-derived list explicitly (e.g., for a standalone HandDrawnLegend).

Constructors

LineChartData({required List<LineSeriesData> series, required double minX, required double maxX, required double minY, required double maxY, List<String> xLabels = const [], String? title, String? yAxisLabel, String? xAxisLabel, AxisValueFormatter? yValueFormatter, AxisValueFormatter? xValueFormatter, AxisDisplay axisDisplay = AxisDisplay.edge, List<FunctionSeriesData> functionSeries = const [], List<LegendEntry> legend = const []})

const

Properties

axisDisplay → AxisDisplay

Axis display configuration. Defaults to edge-aligned axes. Set to enable zero-crossing axes for charts with mixed positive/negative values.

final

functionSeries → List<FunctionSeriesData>

Function-backed series. Each entry plots a mathematical function across the numeric x-domain.

final

hashCode → int

The hash code for this object.

no setter, override

isEmpty → bool

no setter

legend → List<LegendEntry>

Custom legend entries.

final

maxX → double

final

maxY → double

final

minX → double

final

minY → double

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

series → List<LineSeriesData>

final

title → String?

Optional chart title rendered above the chart area.

final

xAxisLabel → String?

Optional X-axis title rendered below the X tick labels.

final

xLabels → List<String>

Categorical X-axis labels. When non-empty, these are rendered as evenly spaced string labels instead of auto-generated numeric ticks.

final

xValueFormatter → AxisValueFormatter?

Optional formatter for X-axis tick labels (numeric mode only).

final

yAxisLabel → String?

Optional Y-axis title rendered rotated along the left edge.

final

yValueFormatter → AxisValueFormatter?

Optional formatter for Y-axis tick labels.

final

Methods

copyWith({List<LineSeriesData>? series, double? minX, double? maxX, double? minY, double? maxY, List<String>? xLabels, String? title, String? yAxisLabel, String? xAxisLabel, AxisValueFormatter? yValueFormatter, AxisValueFormatter? xValueFormatter, AxisDisplay? axisDisplay, List<FunctionSeriesData>? functionSeries, List<LegendEntry>? legend}) → LineChartData

Returns a copy of this data with the given fields replaced. Fields not specified retain their current value. Nullable fields cannot be cleared via copyWith — construct a new LineChartData directly when that's needed.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override