Computed<T> class

A watchable derived state.

Inheritance

• Object
• Watchable<T>
• Computed

Available extensions

• WatchableExtensions

Constructors

Computed(StateBuilder<T> stateBuilder, {EqualityComparer<T>? equalityComparer})

Creates a derived state which combine the current state of other parts and allows any widget to be rebuilt when the underlaying value changes.

const

Properties

equalityComparer → EqualityComparer<T>?

The predicate determining if two states are the same.

final, inherited

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

stateBuilder → StateBuilder<T>

The function used to build the state.

final

Methods

equals(T oldState, T newState) → bool

Internal use only.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

read(StateReader read, List<BinderKey>? keys) → T

Internal use only.

override

select<S>(Selector<T, S> selector, {EqualityComparer<S>? equalityComparer}) → Watchable<S>

Available on Watchable<T>, provided by the WatchableExtensions extension

Creates a selector on a reference that can be watched.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited