DependentCell<T> class abstract

A cell of which the value is dependent on the value of one or more argument cells.

The purpose of this class is to implement a cell of which the value is a function of one or more argument cells, thus the value of this cell needs to be recomputed whenever the values of the argument cells change.

This class does not provide storage for the cell's value, it is intended to be computed on demand when accessed, whilst observers are added directly on the argument cells.

Inheritance

• Object
• ValueCell<T>
• DependentCell

Implementers

• ComputeCell

Available extensions

• ActionCellEffectExtension
• ActionCellExtension
• BoolCellExtension
• BoolValueChangeExtension
• CellHolderExtension
• ComputeArgumentsTracker
• ComputeExtension
• DelayCellExtension
• DurationCellExtension
• EffectCellExtension
• ErrorCellExtension
• IterableCellExtension
• ListCellExtension
• MapCellExtension
• MaybeCellExtension
• NullCheckExtension
• NumericExtension
• PeekCellExtension
• PrevValueCellExtension
• SetCellExtension
• StoreCellExtension
• TransformExtension
• ValueChangeExtension
• WaitCellExtension

Constructors

DependentCell(Set<ValueCell> arguments, {dynamic key})

Create a cell, of which the value depends on a list of argument cells.

Properties

arguments → Set<ValueCell>

Set of argument cells.

final

equalityCellFactory → EqualityCellFactory

Return a factory for creating equality and inequality comparison cells.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, override

key ↔ dynamic

Key that uniquely identifies this cell.

late, final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → T

The cell's value

no setter, inherited

Methods

addObserver(CellObserver observer) → void

Register an observer of the cell to be called when the cell's value changes.

override

call() → T

Retrieve the value of the cell.

inherited

eq<U>(ValueCell<U> other) → ValueCell<bool>

Returns a new ValueCell which compares the value of this cell to another cell for equality.

inherited

neq<U>(ValueCell<U> other) → ValueCell<bool>

Returns a new ValueCell which compares the value of this cell to another cell for inequality.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

observe() → void

Track this cell as an argument of the current compute/watch function.

inherited

removeObserver(CellObserver observer) → void

Remove an observer that was previously registered with addObserver.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override