ChartExporter class

Utility class for capturing high-DPI snapshots of the chart canvas and exporting data.

Constructors

ChartExporter()

Properties

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

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

Static Methods

capturePng(GlobalKey<State<StatefulWidget>> repaintBoundaryKey, {double pixelRatio = 2.0}) → Future<Uint8List?>

Captures the widget subtree wrapped in a RepaintBoundary as PNG byte data. pixelRatio controls the resolution multiplier (default: 2.0 for retina clarity).

exportCandlesToCsv(List<Candle> candles, {bool includeHeaders = true}) → String

Exports a list of Candle records into standard RFC 4180 CSV format. Columns: timestamp,open,high,low,close,volume

showSnapshotDialog({required BuildContext context, required Uint8List pngBytes, String symbol = 'Chart'}) → Future<void>

Displays a modern, dark-themed preview modal of the captured chart snapshot.