LineChart class

A customizable and animated line chart widget for Flutter.

The LineChart class allows you to plot multiple data series with options for custom tooltips and smooth animations when data points are added or removed.

Example usage:

LineChart(
  elements: [
    ChartGridLines(isVertical: false, count: 5),
    ChartAxisLabels(
      isVertical: true, count: 5, labelBuilder: (value) => value.toStringAsFixed(2),
    ),
    ChartAxisLabels(
      isVertical: false, count: 5, labelBuilder: (value) => value.toStringAsFixed(2),
    ),
    ChartDataSeries(
      data: [ChartData(x: 1.0, y: 2.0)],
      color: Colors.blue,
    ),
    ChartDataSeries(
      data: [ChartData(x: 1.0, y: 4.0)],
      color: Colors.red,
      lineType: LineType.bezier,
    ),
  ],
  tooltipBuilder: (context, dataPoints, dataColors) {
    return YourTooltipWidget(
      dataPoints: dataPoints,
      dataColors: dataColors,
    );
  },
  backgroundColor: Colors.white,
)
Inheritance

Constructors

LineChart({required List<ChartElement> elements, Widget tooltipBuilder(BuildContext, List<ChartData>, List<Color>)?, Duration animationDuration = const Duration(milliseconds: 500), ChartExtent domainExtent = const ChartExtent.tight(), ChartExtent rangeExtent = const ChartExtent(), Color backgroundColor = Colors.black, EdgeInsets padding = const EdgeInsets.all(32), MarkerSelectionStrategy? markerSelectionStrategy, Key? key})
Creates a LineChart widget.
const

Properties

animationDuration → Duration
The duration of the animation when the chart updates.
final
backgroundColor → Color
The background color of the chart.
final
domainExtent → ChartExtent
The extent of the domain (x-axis) of the chart.
final
elements → List<ChartElement>
The list of elements to be rendered in the chart.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
markerSelectionStrategy → MarkerSelectionStrategy?
The strategy to use for selecting markers on the chart.
final
padding → EdgeInsets
The padding around the chart to accommodate labels and other elements.
final
rangeExtent → ChartExtent
The extent of the range (y-axis) of the chart.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
tooltipBuilder → Widget Function(BuildContext, List<ChartData>, List<Color>)?
A builder function to create custom tooltips for data points.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _LineChartState
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited