Variable<D, V> class

The specification of a variable.

Instead of raw Chart.data, the chart reorgnize datum to "original value tuple" (See details in Tuple) for internal usage. The variable defines how to create a field in original value tuple form input datum, and the scale specification of the field.

The generic D is the type of datum in Chart.data list, and V is the type of field value. V can only be String, num or DateTime.

See also:

• Tuple, the original value tuple.

Constructors

Variable({required Accessor<D, V> accessor, Scale<V, num>? scale})

Creates a variable specification.

Properties

accessor ↔ Accessor<D, V>

Indicates how to get the variable value from a datum.

getter/setter pair

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

scale ↔ Scale<V, num>?

Scale specification of this variable.

getter/setter pair

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.

override