TinyBarChart class

A Widget that paints a simple bar chart.

It is ideal for sparkline charts.

The chart can be TinyBarChart.single or TinyBarChart.stacked. For stacked, it is also possible to pass the data in raw vectors by using TinyBarChart.stackedFromDataVectors.

The chart is rendered with a series of bars each representing the y value of each element dataPoints. The bars are sorted by the x values.

The bars are rendered side by side (stacked).

The width of each bar represents the percentage of space occupied by the data point value in a data space between zero and the "max" value. The "max" value is equal to options.max or, when null, the sum of all bar values.

If both width and height are passed, the chart will try to keep aspect ratio.

See also:

• TinyBarChart.single to build a bar chart that represents only one value.
• TinyBarChart.stacked To build a bar chart of stacked bars.
• TinyBarChart.stackedFromDataVectors To build a stacked bar chart from raw Vector2.
• TinyBarChartOptions for more details on options.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• TinyBarChart

Constructors

TinyBarChart.single({Key? key, required double value, required double max, Color? color, double? width, double? height})

Creates a TinyBarChart that represents the percentage of value in relation to max.

factory

TinyBarChart.stacked({Key? key, required Iterable<double> data, TinyBarChartOptions? options, double? width, double? height})

Creates a TinyBarChart that represents the bars defined by data.

factory

TinyBarChart.stackedFromDataVectors({Key? key, required Iterable<Vector2> dataPoints, TinyBarChartOptions? options, double? width, double? height})

Just like TinyBarChart.stacked except the data is represented by a list of Vector2.

const

Properties

dataPoints → Iterable<Vector2>

The set of vectors that represents the bars data.

final

hashCode → int

The hash code for this object.

no setter, inherited

height → double?

If non-null, require the chart to have this height.

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

options → TinyBarChartOptions

A set of options to customize the chart display, defaults to kDefaultBarChartOptions when null on construction.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width → double?

If non-null, require the chart to have this width.

final

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

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}) → 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