ValueCell class - live_cells library

Constructors

ValueCell(): const
ValueCell.computed(T compute(), {dynamic key, bool changesOnly = false}): Create a cell which computes its value using the function compute.
factory
ValueCell.value(T value): Create a value cell with a constant value
const

factory

Properties

asyncState → ValueCell<AsyncState<T>>: Available on FutureCell<T>, provided by the WaitCellExtension extension
A cell that evaluates to the AsyncState of the Future in this cell.
no setter
awaited → ValueCell<T>: Available on FutureCell<T>, provided by the WaitCellExtension extension
A cell that awaits the Future held in this.
no setter
cellList → ValueCell<Iterable<ValueCell<T>>>: Available on ValueCell<List<T>>, provided by the ListCellExtension extension
Returns a cell which wraps the elements of the List held in this cell in ValueCells.
no setter
effectCell → ValueCell<T>: Available on ValueCell<T>, provided by the EffectCellExtension extension
Create a cell for observing side effects defined in this cell.
no setter
entries → ValueCell<Iterable<MapEntry<K, V>>>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.entries applied on the value in this cell.
no setter
equalityCellFactory → EqualityCellFactory: Return a factory for creating equality and inequality comparison cells.
no setter
error → ValueCell: Available on ValueCell<Maybe<T>>, provided by the MaybeCellExtension extension
A cell which evaluates to the error of the Maybe.
no setter
first → ValueCell<T>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.first applied on the value in this cell.
no setter
hashCode → int: The hash code for this object.
no setterinherited
inDays → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of days, see Duration.inDays
no setter
inHours → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of hours, see Duration.inHours
no setter
inMicroseconds → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of microseconds, see Duration.inMicroseconds
no setter
inMilliseconds → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of milliseconds, see Duration.inMilliseconds
no setter
inMinutes → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of minutes, see Duration.inMinutes
no setter
inSeconds → ValueCell<int>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
The duration in units of seconds, see Duration.inSeconds
no setter
isCompleted → ValueCell<bool>: Available on FutureCell<T>, provided by the WaitCellExtension extension
A cell that is true when the Future in this has completed, false otherwise.
no setter
isEmpty → ValueCell<bool>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.isEmpty applied on the value in this cell.
no setter
isEmpty → ValueCell<bool>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.isEmpty applied on the value in this cell
no setter
isFinite → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension

no setter
isInfinite → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension

no setter
isNaN → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension

no setter
isNegative → ValueCell<bool>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell, the value of which is true if this is negative, see Duration.isNegative.
no setter
isNotEmpty → ValueCell<bool>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.isNotEmpty applied on the value in this cell.
no setter
isNotEmpty → ValueCell<bool>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.isNotEmpty applied on the value in this cell
no setter
keys → ValueCell<Iterable<K>>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.keys applied on the value in this cell.
no setter
last → ValueCell<T>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.last applied on the value in this cell.
no setter
length → ValueCell<int>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.length applied on the value in this cell.
no setter
length → ValueCell<int>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.length applied on the value in this cell
no setter
notNull → ValueCell<T>: Available on ValueCell<T?>, provided by the NullCheckExtension extension
A cell that is guaranteed to hold a non-null value.
no setter
peek → ValueCell<T>: Available on ValueCell<T>, provided by the PeekCellExtension extension
Use the value of this without reacting to changes.
no setter
previous → ValueCell<T>: Available on ValueCell<T>, provided by the PrevValueCellExtension extension
Return a cell which holds the previous value of this cell.
no setter
reversed → ValueCell<Iterable<T>>: Available on ValueCell<List<T>>, provided by the ListCellExtension extension
Returns a cell which evaluates to List.reversed applied on the value in this cell.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
sign → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension

no setter
single → ValueCell<T>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.single applied on the value in this cell.
no setter
unwrap → ValueCell: Available on ValueCell<Maybe<T>>, provided by the MaybeCellExtension extension
A cell which evaluates to the unwrapped value (by Maybe.unwrap) of the Maybe.
no setter
value → T: The cell's value
no setter
values → ValueCell<Iterable<V>>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to Map.values applied on the value in this cell.
no setter
wait → ValueCell<T>: Available on FutureCell<T>, provided by the WaitCellExtension extension
Return a cell that awaits the Future held in this.
no setter
waitLast → ValueCell<T>: Available on FutureCell<T>, provided by the WaitCellExtension extension
A cell that awaits the Future held in this.
no setter
whenReady → ValueCell<T>: Available on ValueCell<T>, provided by the ErrorCellExtension extension
Create a cell that evaluates to ValueCell.none() while the cell's value is uninitialized.
no setter

Methods

abs() → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell holding a Duration of the same length as this but positive, see Duration.abs.
abs() → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
addObserver(CellObserver observer) → void: Register an observer of the cell to be called when the cell's value changes.
and(ValueCell<bool> other) → ValueCell<bool>: Available on ValueCell<bool>, provided by the BoolCellExtension extension
Create a new cell which is the logical and of this and other.
apply(U fn(T value), {dynamic key}) → ValueCell: Available on ValueCell<T>, provided by the ComputeExtension extension
Create a new cell, with a value which is computed by applying a function on this cell's value
call() → T: Retrieve the value of the cell.
cast<R>() → ValueCell<Iterable<R>>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.cast<R>() applied on the value in this cell.
cast<R>() → ValueCell<List<R>>: Available on ValueCell<List<T>>, provided by the ListCellExtension extension
Returns a cell which evaluates to List.cast<R>() applied on the value in this cell.
chain(void action(), {dynamic key}) → ActionCell: Available on ValueCell<void>, provided by the ActionCellExtension extension
Create an action cell that is chained to this cell.
coalesce(ValueCell<T> ifNull) → ValueCell<T>: Available on ValueCell<T?>, provided by the NullCheckExtension extension
Replace null values in this cell with value of another cell.
contains(ValueCell elem) → ValueCell<bool>: Available on ValueCell<Set<T>>, provided by the SetCellExtension extension
Returns a cell that evaluates to true if the Set contains elem.
containsAll(ValueCell<Iterable> elems) → ValueCell<bool>: Available on ValueCell<Set<T>>, provided by the SetCellExtension extension
Returns a cell that evaluates to true if the Set contains elems.
containsKey(ValueCell key) → ValueCell<bool>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to true if the Map held in this cell contains the key key.
containsValue(ValueCell val) → ValueCell<bool>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to true if the Map held in this cell contains the value val.
delayed(Duration delay) → FutureCell<T>: Available on ValueCell<T>, provided by the DelayCellExtension extension
Create a cell which notifies its observers, for value changes in this, after a delay.
effect<T>(T fn(), {dynamic key}) → ValueCell<T>: Available on ValueCell<void>, provided by the ActionCellEffectExtension extension
Create a cell with a side effect that is run whenever this cell is triggered..
eq(ValueCell other) → ValueCell<bool>: Returns a new ValueCell which compares the value of this cell to another cell for equality.
error<E extends Object>({bool all = false}) → ValueCell<E?>: Available on ValueCell<T>, provided by the ErrorCellExtension extension
Create a cell which captures exceptions thrown during the computation of this cell.
hold() → CellHolder: Available on ValueCell, provided by the CellHolderExtension extension
Ensure that this cell is active.
initialValue(ValueCell<T> value) → ValueCell<T>: Available on ValueCell<T>, provided by the ErrorCellExtension extension
Returns a cell that evaluates to the value of value when the value of this is uninitialized.
loadingValue(ValueCell<T> value) → ValueCell<T>: Available on ValueCell<T>, provided by the ErrorCellExtension extension
Returns a cell that evaluates to the value of value while an async value is loading..
map<E>(E toElement(T e)) → ValueCell<Iterable<E>>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.map() applied on the value in this cell.
mapCells<E>(E fn(T e)) → ValueCell<Iterable<ValueCell<E>>>: Available on ValueCell<List<T>>, provided by the ListCellExtension extension
Apply a function on the value of every cell in cellList.
mutableApply(U fn(T), void reverse(U), {dynamic key, bool changesOnly = false}) → MutableCell: Available on ValueCell<T>, provided by the ComputeExtension extension
Create a new mutable cell, with a value that is a function of this cell's value.
neq(ValueCell other) → ValueCell<bool>: Returns a new ValueCell which compares the value of this cell to another cell for inequality.
nextValue() → Future<T>: Available on ValueCell<T>, provided by the ValueChangeExtension extension
Returns a Future that completes with the next value of this cell, when it is updated.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
not() → ValueCell<bool>: Available on ValueCell<bool>, provided by the BoolCellExtension extension
Create a new cell which is the logical not of this.
observe() → void: Track this cell as an argument of the current compute/watch function.
onError<E extends Object>(ValueCell<T> other) → ValueCell<T>: Available on ValueCell<T>, provided by the ErrorCellExtension extension
Create a cell which handles exceptions thrown while computing the value of this.
or(ValueCell<bool> other) → ValueCell<bool>: Available on ValueCell<bool>, provided by the BoolCellExtension extension
Create a new cell which is the logical or of this and other.
remainder(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
removeObserver(CellObserver observer) → void: Remove an observer that was previously registered with addObserver.
select<T>(ValueCell<T> ifTrue, [ValueCell<T>? ifFalse]) → ValueCell<T>: Available on ValueCell<bool>, provided by the BoolCellExtension extension
Create a new cell which selects between the values of two cells based on this.
store({bool changesOnly = false}) → StoreCell<T>: Available on ValueCell<T>, provided by the StoreCellExtension extension
Return a ValueCell which stores the value of this cell in memory.
toList() → ValueCell<List<T>>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.toList applied on the value in this cell.
toSet() → ValueCell<Set<T>>: Available on ValueCell<Iterable<T>>, provided by the IterableCellExtension extension
Returns a cell which evaluates to Iterable.toSet applied on the value in this cell.
toString() → String: A string representation of this object.
inherited
transform() → ValueCell: Available on ValueCell<T>, provided by the TransformExtension extension
untilFalse() → Future<void>: Available on ValueCell<bool>, provided by the BoolValueChangeExtension extension
Returns a Future that completes when the value of this cell is false.
untilTrue() → Future<void>: Available on ValueCell<bool>, provided by the BoolValueChangeExtension extension
Returns a Future that completes when the value of this cell is true.
untilValue(U value) → Future<void>: Available on ValueCell<T>, provided by the ValueChangeExtension extension
Returns a Future that completes when the value of this cell equals value.

Operators

operator %(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator *(ValueCell<num> factor) → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell which holds the multiplication of this by factor.
operator *(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator +(ValueCell<Duration> other) → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell which holds the sum of this and other.
operator +(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator -(ValueCell<Duration> other) → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell which holds the subtraction of other from this.
operator -(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator /(ValueCell<num> other) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator <(ValueCell<Duration> other) → ValueCell<bool>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell of which the value is true if this is less than other
operator <(ValueCell<num> other) → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension
operator <=(ValueCell<Duration> other) → ValueCell<bool>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell of which the value is true if this is less than or equal to other
operator <=(ValueCell<num> other) → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension
operator ==(Object other) → bool: The equality operator.
inherited
operator >(ValueCell<Duration> other) → ValueCell<bool>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell of which the value is true if this is greater than other
operator >(ValueCell<num> other) → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension
operator >=(ValueCell<Duration> other) → ValueCell<bool>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell of which the value is true if this is greater than or equal to other
operator >=(ValueCell<num> other) → ValueCell<bool>: Available on ValueCell<num>, provided by the NumericExtension extension
operator [](ValueCell<int> index) → ValueCell<T>: Available on ValueCell<List<T>>, provided by the ListCellExtension extension
Returns a cell with a value equal to the element at index in the List held in this cell.
operator [](ValueCell key) → ValueCell<V?>: Available on ValueCell<Map<K, V>>, provided by the MapCellExtension extension
Returns a cell which evaluates to the value of the entry with key key.
operator unary-() → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell which holds the negation of this.
operator unary-() → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension
operator ~/(ValueCell<int> quotient) → ValueCell<Duration>: Available on ValueCell<Duration>, provided by the DurationCellExtension extension
Returns a cell which holds the division of this by quotient.
operator ~/(ValueCell<num> arg) → ValueCell<num>: Available on ValueCell<num>, provided by the NumericExtension extension

Static Methods

none([dynamic defaultValue]) → dynamic: Stop computation of the current cell's value.
watch(WatchCallback watch, {dynamic key}) → CellWatcher: Register a callback function to be called whenever the values of the referenced cells change.

ValueCell<T> class abstract

Constructors

Properties

Methods

Operators

Static Methods

live_cells library