HistoryStore<S> class

A store that captures the history and enables undo and redo operations.

Implemented types
Available Extensions

Constructors

HistoryStore(Store<S> delegate, {Predicate1<S>? filter, int? limit})
Constructs a history store.

Properties

canRedo → bool
Tests if the last action can be redone.
no setter
canUndo → bool
Tests if the last change to the store can be undone.
no setter
delegate → Store<S>
The store that manages the current state.
final
filter → Predicate1<S>?
An (optional) filter predicate to exclude certain states from the history.
final
future → List<S>
Read-only accessor to the future history states.
no setter
hashCode → int
The hash code for this object.
no setterinherited
limit → int?
An (optional) limit of history states to remember.
final
past → List<S>
Read-only accessor to the past history states.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
state → S
Returns the current state.
no setteroverride

Methods

clear() → void
Clears the undo/redo history.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
redo() → S
Redoes the last change to the store.
subscribe(Observer<S> observer) → Disposable
Subscribes with the provided observer.
override
toString() → String
A string representation of this object.
inherited
undo() → S
Undoes the last change to the store.
update(Updater<S> updater) → S
Updates the current state.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited