Chart<D> class

A widget to display the chart.

Specifications details of data visualization are seen in this class properties. The are set in the constructornew Chart.

Usually, if any specification or data is changed, the chart will rebuild or reevaluate automatically. Some subtle setting is controlled by rebuild and changeData. Note that function properties will always be regarded unchanged.

The generic D is the type of datum in data list.

The properties of this chart sepcification are final because it is also an immutable StatefulWidget, but other specifications can be modified.

Inheritance

Constructors

Chart({Key? key, required List<D> data, bool? changeData, required Map<String, Variable<D, dynamic>> variables, List<VariableTransform>? transforms, required List<Mark<Shape>> marks, Coord? coord, EdgeInsets padding(Size)?, List<AxisGuide>? axes, TooltipGuide? tooltip, CrosshairGuide? crosshair, List<Annotation>? annotations, Map<String, Selection>? selections, bool? rebuild, StreamController<GestureEvent>? gestureStream, StreamController<ResizeEvent>? resizeStream, StreamController<ChangeDataEvent<D>>? changeDataStream})
Creates a chart widget.
const

Properties

annotations → List<Annotation>?
Specifications of annotations.
final
axes → List<AxisGuide>?
Specifications of axes.
final
changeData → bool?
The behavior of data reevaluation when widget is updated.
final
changeDataStream → StreamController<ChangeDataEvent<D>>?
The interaction stream of change data events.
final
coord → Coord?
Specification of the coordinate.
final
crosshair → CrosshairGuide?
Specification of pointer crosshair on selections.
final
data → List<D>
The data list to visualize.
final
gestureStream → StreamController<GestureEvent>?
The interaction stream of gesture events.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
marks → List<Mark<Shape>>
Specifications of geometry marks.
final
padding → (EdgeInsets Function(Size)?)
The padding from coordinate region to the widget border.
final
rebuild → bool?
The behavior of chart rebuilding when widget is updated.
final
resizeStream → StreamController<ResizeEvent>?
The interaction stream of resize events.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
selections → Map<String, Selection>?
Name identifiers and specifications of selection definitions.
final
tooltip → TooltipGuide?
Specification of tooltip on selections.
final
transforms → List<VariableTransform>?
Specifications of transforms applied to variable data.
final
variables → Map<String, Variable<D, dynamic>>
Name identifiers and specifications of variables.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → ChartState<D>
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
equalSpecTo(Object other) → bool
Checks the equlity of two chart specifications.
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}) → 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