ValueCell<T> class
abstract
Base value cell interface.
- Available extensions
- ActionCellEffectExtension
- ActionCellExtension
- BoolCellExtension
- BoolValueChangeExtension
- CellHolderExtension
- CellListenableExtension
- CellRestorationExtension
- ComputeExtension
- DelayCellExtension
- DurationCellExtension
- EffectCellExtension
- ErrorCellExtension
- IterableCellExtension
- ListCellExtension
- MapCellExtension
- MaybeCellExtension
- NullCheckExtension
- NumericExtension
- PeekCellExtension
- PrevValueCellExtension
- SetCellExtension
- StoreCellExtension
- TransformExtension
- ValueChangeExtension
- WaitCellExtension
- WidgetCellExtension
- WidgetExtension
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
constfactory
Properties
- equalityCellFactory → EqualityCellFactory
-
Return a factory for creating equality and inequality comparison cells.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → T
-
The cell's value
no setter
Methods
-
addObserver(
CellObserver observer) → void - Register an observer of the cell to be called when the cell's value changes.
-
call(
) → T - Retrieve the value of the cell.
-
eq<
U> (ValueCell< U> other) → ValueCell<bool> - Returns a new ValueCell which compares the value of this cell to another cell for equality.
-
neq<
U> (ValueCell< U> other) → ValueCell<bool> - Returns a new ValueCell which compares the value of this cell to another cell for inequality.
-
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.
-
removeObserver(
CellObserver observer) → void - Remove an observer that was previously registered with addObserver.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
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.