MutableDependentCell<T> class abstract

Base class for a computational cell which can have its value set.

The use of this class is similar to DependentCell however the compute method, rather than the value property setter, has to be overriden with the implementation of the cell computation function.

Constructors of this class must call the MutableDependentCell constructor with the list of argument cells which are referenced in the compute function. The value of the cell will be recomputed whenever the value of one of the argument cells changes.

Additionally, subclasses must also implement the reverseCompute method, which is called whenever the value of the cell is set. This method should update the values of the argument cells.

Inheritance

• Object
• ValueCell<T>
• StatefulCell<T>
• PersistentStatefulCell<T>
• MutableDependentCell

Implemented types

• RestorableCell<T>
• MutableCell<T>

Implementers

• MutableComputeCell

Available extensions

• ActionCellEffectExtension
• ActionCellExtension
• BoolCellExtension
• BoolValueChangeExtension
• CellHolderExtension
• CellMaybeExtension
• ComputeArgumentsTracker
• ComputeExtension
• ConvertStringExtension
• DelayCellExtension
• DurationCellExtension
• EffectCellExtension
• ErrorCellExtension
• IterableCellExtension
• ListCellExtension
• MapCellExtension
• MaybeCellExtension
• MutableDurationCellExtension
• MutableListCellExtension
• MutableMapCellExtension
• MutableNullCheckExtension
• MutableTransformExtension
• NullCheckExtension
• NumericExtension
• ParseDoubleExtension
• ParseIntExtension
• ParseMaybeDoubleExtension
• ParseMaybeIntExtension
• ParseMaybeNumExtension
• ParseNumExtension
• PeekCellExtension
• PrevValueCellExtension
• SetCellExtension
• StoreCellExtension
• TransformExtension
• ValueChangeExtension
• WaitCellExtension

Constructors

MutableDependentCell(Set<ValueCell> arguments, {bool changesOnly = false, dynamic key})

Construct a MutableDependentCell which depends on the cells in arguments

Properties

arguments → Set<ValueCell>

List of argument cells.

final

changesOnly → bool

Should the cell notify its observers only when its value has changed?

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, inherited

hasState → bool

Does this cell have a state?

no setter, inherited

key ↔ dynamic

Key which uniquely identifies the cell

late, final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

state → MutableComputedCellState<T, MutableDependentCell<T>>

The current state of the cell, or null if the cell is inactive.

no setter

value ↔ T

The cell's value

getter/setter pair, inherited

Methods

addObserver(CellObserver observer) → void

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

inherited

call() → T

Retrieve the value of the cell.

inherited

compute() → T

Compute the value of the cell.

createMutableState({covariant MutableComputedCellState<T, MutableDependentCell<T>>? oldState}) → MutableComputedCellState<T, MutableDependentCell<T>>

Create the state for the MutableCell.

createState() → MutableCellState<T, MutableCellBase<T>>

Create the CellState for this cell.

inherited

dumpState(CellValueCoder coder) → Object?

Dump the state of the cell to a value.

override

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.

inherited

restoreState(Object? state, CellValueCoder coder) → void

Restore the state of the cell.

override

reverseCompute(T value) → void

Set the value of the argument cells in response to the value of the cell being set.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited