ListNotifier<T> class

A List that behaves like ValueNotifier if its data changes. it does not compare the elements on bulk operations If you set notifyIfEqual to false it will compare if a value passed value passed is equal to the existing value. like list[5]=4 if the content at index 4 is equal to 4 and only call notifyListeners if they are not equal. To allow atomic changes ListNotifier supports a single level of transactions

Inheritance
Implemented types
Mixed-in types
Available extensions

Constructors

ListNotifier({List<T>? data, bool notifyIfEqual = true, bool customEquality(T x, T y)?})
Creates a new listenable List data optional list that should be used as initial value if notifyIfEqual is false ListNotifier will compare if a value passed is equal to the existing value. like list[5]=4 if the content at index 4 is equal to 4 and only call notifyListeners if they are not equal. To prevent users from wondering why their UI doesn't update if they haven't overritten the equality operator the default is true. Alternatively you can pass in a customEquality function that is then used instead of ==

Properties

customEquality → bool Function(T x, T y)?
final
first ↔ T
The first element.
getter/setter pairinherited
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
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
length ↔ int
The number of elements in this Iterable.
getter/setter pairinherited-getteroverride-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
value → List<T>
returns an unmodifiable view on the lists data.
no setteroverride

Methods

add(T value) → void
Adds value to the end of this list, extending the length by one.
override
addAll(Iterable<T> iterable) → void
Appends all objects of iterable to the end of this list.
override
addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
any(bool test(T)) → bool
Checks whether any element of this iterable satisfies test.
inherited
asMap() → Map<int, T>
An unmodifiable Map view of this list.
inherited
cast<T>() → List<T>
A view of this iterable as an iterable of R instances.
inherited
clear() → void
Removes all objects from this list; the length of the list becomes zero.
override
contains(Object? element) → bool
Whether the collection contains an element equal to element.
inherited
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
elementAt(int index) → T
Returns the indexth element.
inherited
endTransAction() → void
Ends a transaction
every(bool test(T)) → bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> f(T)) → Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
fillRange(int start, int end, [T? fillValue]) → void
Overwrites a range of elements with fillValue.
override
firstWhere(bool test(T), {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 f(T)) → 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(T element, [int start = 0]) → int
The first index of element in this list.
inherited
indexWhere(bool test(T), [int start = 0]) → int
The first index in the list that satisfies the provided test.
inherited
insert(int index, T element) → void
Inserts element at position index in this list.
override
insertAll(int index, Iterable<T> iterable) → void
Inserts all objects of iterable at position index in this list.
override
join([String separator = '']) → String
Converts each element to a String and concatenates the strings.
inherited
lastIndexOf(T element, [int? start]) → int
The last index of element in this list.
inherited
lastIndexWhere(bool test(T), [int? start]) → int
The last index in the list that satisfies the provided test.
inherited
lastWhere(bool test(T), {T orElse()?}) → T
The last element that satisfies the given predicate test.
inherited
map<T>(T f(T)) → 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
If needed you can notifiy all listeners manually
override
reduce(T combine(T value, T element)) → T
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
remove(Object? value) → bool
Removes the first occurrence of value from this list.
override
removeAt(int index) → T
Removes the object at position index from this list.
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 a range of elements from the list.
override
removeWhere(bool test(T)) → void
Removes all objects from this list that satisfy test.
override
replaceRange(int start, int end, Iterable<T> iterable) → void
Replaces a range of elements with the elements of replacements.
override
retainWhere(bool test(T)) → void
Removes all objects from this list that fail to satisfy test.
override
retype<T>() → List<T>
inherited
setAll(int index, Iterable<T> iterable) → void
Overwrites elements with the objects of iterable.
override
setRange(int start, int end, Iterable<T> iterable, [int skipCount = 0]) → void
Writes some elements of iterable into a range of this list.
override
shuffle([Random? random]) → void
Shuffles the elements of this list randomly.
override
singleWhere(bool test(T), {T orElse()?}) → T
The single element that satisfies test.
inherited
skip(int n) → Iterable<T>
Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(T)) → Iterable<T>
Creates an Iterable that skips leading elements while test is satisfied.
inherited
sort([int compare(T, T)?]) → void
Sorts this list according to the order specified by the compare function.
override
startTransAction() → void
Starts a transaction that allows to make multiple changes to the List with only one notification at the end.
sublist(int start, [int? end]) → List<T>
Returns a new list containing the elements between start and end.
inherited
swap(int index1, int index2) → void
swaps elements on index1 with index2
take(int n) → Iterable<T>
Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(T)) → 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)) → 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
The object at the given index in the list.
override
operator []=(int index, T value) → void
Sets the value at the given index in the list to value.
override