QuantityConstraint class

Defines the quantity constraints for the number of widgets expected to be found.

This class specifies the minimum and maximum number of widgets that a selector should match, enabling precise control over the selection criteria.

Constructors

QuantityConstraint({int? min, int? max})

Constructs a QuantityConstraint with optional minimum and maximum values.

const

QuantityConstraint.atLeast(int n)

Constructs a QuantityConstraint where at least n widgets should match.

const

QuantityConstraint.atMost(int n)

Constructs a QuantityConstraint where at most n widgets should match.

const

QuantityConstraint.exactly(int n)

Constructs a QuantityConstraint where exactly n widgets should match.

const

Properties

hashCode → int

The hash code for this object.

no setter, override

max → int?

The maximum number of widgets that should match. null for no maximum.

final

min → int?

The minimum number of widgets that should match. null for no minimum.

final

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.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Constants

single → const QuantityConstraint

Represents a constraint where exactly one widget should match.

unconstrained → const QuantityConstraint

Represents an unconstrained quantity, allowing any number of widgets to match.

zero → const QuantityConstraint

Represents a constraint where no widgets should match.