ListChangeNotifier<T> class

An implementation of ChangeNotifier that allows implementers to interact with this provider as if it were a Map and be notified when any changes to the map have been made

Like ChangeNotifier, this is optimized for small numbers of listeners. It is O(N) for adding and removing listeners.

K is the type of the Key to be used by this map. It is usually a String, but can be any subclass of Object. It must implement operator== and hashCode

T is the type of the Value to be used by this map. It can be any subclass of Object and has no special requirements.

Inheritance
Mixed-in types
Available extensions

Constructors

ListChangeNotifier.new([List<T>? backingList])

Properties

first ↔ T
The first element.
getter/setter pairinherited
firstOrNull → T?

Available on Iterable<T>, provided by the IterableExtensions extension

The first element of this iterator, or null if the iterable is empty.
no setter
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
indexed → Iterable<(int, T)>

Available on Iterable<T>, provided by the IterableExtensions extension

Pairs of elements of the indices and elements of this iterable.
no setter
isEmpty → bool
Whether this collection has no elements.
no setterinherited
isNotEmpty → bool
Whether this collection has at least one element.
no setterinherited
iterator → Iterator<T>
A new Iterator that allows iterating the elements of this Iterable.
no setterinherited
last ↔ T
The last element.
getter/setter pairinherited
lastOrNull → T?

Available on Iterable<T>, provided by the IterableExtensions extension

The last element of this iterable, or null if the iterable is empty.
no setter
length ↔ int
The number of objects in this list.
getter/setter pairoverride
nonNulls → Iterable<T>

Available on Iterable<T?>, provided by the NullableIterableExtensions extension

The non-null elements of this iterable.
no setter
reversed → Iterable<T>
An Iterable of the objects in this list in reverse order.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
single → T
Checks that this iterable has only one element, and returns that element.
no setterinherited
singleOrNull → T?

Available on Iterable<T>, provided by the IterableExtensions extension

The single element of this iterator, or null.
no setter
toJS → JSArray<T>

Available on List<T>, provided by the ListToJSArray extension

Converts this List to a JSArray by either casting, unwrapping, or cloning the List.
no setter
toJSProxyOrRef → JSArray<T>

Available on List<T>, provided by the ListToJSArray extension

Converts this List to a JSArray by either casting, unwrapping, or proxying the List.
no setter
wait → Future<List<T>>

Available on Iterable<Future<T>>, provided by the FutureIterable extension

Waits for futures in parallel.
no setter

Methods

add(T element) → void
Adds element to the end of this list, extending the length by one. Listeners are notified after the element is added
override
addAll(Iterable<T> iterable) → void
Appends all objects of iterable to the end of the list. Listeners are notified after all objects have been added.
override
addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
any(bool test(T element)) → bool
Checks whether any element of this iterable satisfies test.
inherited
asMap() → Map<int, T>
An unmodifiable Map view of this list.
inherited
asNameMap() → Map<String, T>

Available on Iterable<T>, provided by the EnumByName extension

Creates a map from the names of enum values to the values.
byName(String name) → T

Available on Iterable<T>, provided by the EnumByName extension

Finds the enum value in this list with name name.
cast<R>() → List<R>
Returns a view of this list as a list of R instances.
inherited
clear() → void
Clear all objects from the list. Listeners are notified after the list is cleared.
override
contains(Object? element) → bool
Whether the collection contains an element equal to element.
inherited
dispose() → void
Discards the internal resources used by the object. After this is called, the object is not in a usable state and should be discarded.
override
elementAt(int index) → T
Returns the indexth element.
inherited
elementAtOrNull(int index) → T?

Available on Iterable<T>, provided by the IterableExtensions extension

The element at position index of this iterable, or null.
every(bool test(T element)) → bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> f(T element)) → Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
fillRange(int start, int end, [T? fill]) → void
Sets the objects in the range start inclusive to end exclusive to the given fill Listeners are notified after all objects are updated.
override
firstWhere(bool test(T element), {T orElse()?}) → T
The first element that satisfies the given predicate test.
inherited
fold<T>(T initialValue, T combine(T previousValue, T element)) → T
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable<T> other) → Iterable<T>
Creates the lazy concatenation of this iterable and other.
inherited
forEach(void action(T element)) → void
Invokes action on each element of this iterable in iteration order.
inherited
getRange(int start, int end) → Iterable<T>
Creates an Iterable that iterates over a range of elements.
inherited
indexOf(Object? element, [int start = 0]) → int
The first index of element in this list.
inherited
indexWhere(bool test(T element), [int start = 0]) → int
The first index in the list that satisfies the provided test.
inherited
insert(int index, T element) → void
Insert element at the position index in this list. Listeners are notified after all objects have been repositioned.
override
insertAll(int index, Iterable<T> iterable) → void
Inserts all objects of iterable at position index in this list. Listeners are notified after all objects have been inserted.
override
join([String separator = ""]) → String
Converts each element to a String and concatenates the strings.
inherited
lastIndexOf(Object? element, [int? start]) → int
The last index of element in this list.
inherited
lastIndexWhere(bool test(T element), [int? start]) → int
The last index in the list that satisfies the provided test.
inherited
lastWhere(bool test(T element), {T orElse()?}) → T
The last element that satisfies the given predicate test.
inherited
map<T>(T f(T element)) → Iterable<T>
The current elements of this iterable modified by toElement.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Notify all the listeners, respecting our paused state falg
inherited
pauseNotifications<T>(ChangeHandler<T> handler, [bool notifyAfter = false]) → T
Pause notifications until after a synchronous handler has completed. If notifyAfter is true, then listeners will automatically be notified after the callback completes. Otherwise, you must notify the listeners;
inherited
pauseNotificationsAsync<T>(AsyncChangeHandler<T> handler, [bool notifyAfter = false]) → Future<T>
Pause notifications until after an asynchronous handler has completed. If notifyAfter is true, then listeners will automatically be notified after the callback completes. Otherwise, you must notify the listeners;
inherited
reduce(T combine(T previousValue, T element)) → T
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
remove(Object? element) → bool
Removes the first occurrence of value from this list.
override
removeAt(int index) → T
Removes the object at position index from the list. Listeners are notified after all objects have been repositioned.
override
removeLast() → T
Removes and returns the last object in this list.
override
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
removeRange(int start, int end) → void
Removes the objects in the range start inclusive to end exclusive. Listeners are notified after all objects are removed.
override
removeWhere(bool test(T element)) → void
Removes all objects from this list that satisfy test. Listeners are notified after all objects have been removed.
override
replaceRange(int start, int end, Iterable<T> newContents) → void
Removes the objects in the range start inclusive to end exclusive and inserts the contents of newContents in its place. Listeners are notified after all the objects have been replaced.
override
retainWhere(bool test(T element)) → void
Removes all objects from the list that fail to satisfy test. Listeners are notified after all objects have been removed.
override
setAll(int index, Iterable<T> iterable) → void
Overwrites objects of this with the objects of iterable start at positions index in this list. Listeners are notified after all objects have been set.
override
setRange(int start, int end, Iterable<T> iterable, [int skipCount = 0]) → void
Copies the objects of iterable, skipping skipCount object first, into the range start inclusive to end exclusive of the list. Listeners are notified after all the values have been set.
override
shuffle([Random? random]) → void
Shuffles the elements of this list randomly. Listeners are notified after shuffling is completed.
override
singleWhere(bool test(T element), {T orElse()?}) → T
The single element that satisfies test.
inherited
skip(int count) → Iterable<T>
Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(T element)) → Iterable<T>
Creates an Iterable that skips leading elements while test is satisfied.
inherited
sort([int compare(T a, T b)?]) → void
Sorts this list according to the order specified by the compare function. Listeners are notified after sorting is completed.
override
sublist(int start, [int? end]) → List<T>
Returns a new list containing the elements between start and end.
inherited
take(int count) → Iterable<T>
Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(T element)) → Iterable<T>
Creates a lazy iterable of the leading elements satisfying test.
inherited
toList({bool growable = true}) → List<T>
Creates a List containing the elements of this Iterable.
inherited
toSet() → Set<T>
Creates a Set containing the same elements as this iterable.
inherited
toString() → String
A string representation of this object.
inherited
where(bool test(T element)) → Iterable<T>
Creates a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<T>
Creates a new lazy Iterable with all elements that have type T.
inherited

Operators

operator +(List<T> other) → List<T>
Returns the concatenation of this list and other.
inherited
operator ==(Object other) → bool
The equality operator.
inherited
operator [](int index) → T
Returns the object at the given index in the list or throws a RangeError if index is out of bounds.
override
operator []=(int index, T value) → void
Sets the value at the given index in the list to value or throws a RangeError if index is out of bounds.
override