ExportableChartController class

Wraps a chart widget in a RepaintBoundary with a managed GlobalKey.

Call ExportableChartController.capture() to get PNG bytes.

final ctrl = ExportableChartController();

ExportableChart(
  controller: ctrl,
  child: TenunChart(config: myConfig),
)

// Later:
final bytes = await ctrl.capture();

Constructors

ExportableChartController()

Properties

boundaryKey → GlobalKey<State<StatefulWidget>>

Repaint boundary key managed by ExportableChart.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

capture({double pixelRatio = 2.0}) → Future<Uint8List?>

captureBytes({ChartImageExportFormat format = ChartImageExportFormat.png, double pixelRatio = 2.0, int jpegQuality = 90, Color jpegBackgroundColor = Colors.white}) → Future<Uint8List?>

captureImage({double pixelRatio = 2.0}) → Future<Image?>

captureJpeg({double pixelRatio = 2.0, int quality = 90, Color backgroundColor = Colors.white}) → Future<Uint8List?>

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.

inherited