MapNotifier<T, V> class
A Map 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 map[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 MapNotifier
supports a single level of transactions
- Inheritance
-
- Object
- DelegatingMap<
T, V> - MapNotifier
- Implemented types
-
- ValueListenable<
Map< T, V> >
- ValueListenable<
- Mixed-in types
Constructors
Properties
-
customEquality
→ bool Function(Map<
T, V> x, Map<T, V> y) -
final
-
entries
→ Iterable<
MapEntry< T, V> > -
The map entries of this Map.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setteroverride
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- isEmpty → bool
-
Whether there is no key/value pair in the map.
no setterinherited
- isNotEmpty → bool
-
Whether there is at least one key/value pair in the map.
no setterinherited
-
keys
→ Iterable<
T> -
The keys of this Map.
no setterinherited
- length → int
-
The number of key/value pairs in the map.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
value
→ Map<
T, V> -
The current value of the object. When the value changes, the callbacks
registered with addListener will be invoked.
no setteroverride
-
values
→ Iterable<
V> -
The values of this Map.
no setterinherited
Methods
-
addAll(
Map< T, V> other) → void -
Adds all key/value pairs of
other
to this map.override -
addEntries(
Iterable< MapEntry< entries) → voidT, V> > -
Adds all key/value pairs of
newEntries
to this map.override -
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
cast<
K2, V2> () → Map< K2, V2> -
Provides a view of this map as having
RK
keys andRV
instances, if necessary.inherited -
clear(
) → void -
Removes all entries from the map.
override
-
containsKey(
Object? key) → bool -
Whether this map contains the given
key
.inherited -
containsValue(
Object? value) → bool -
Whether this map contains the given
value
.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
-
forEach(
void f(T, V)) → void -
Applies
action
to each key/value pair of the map.inherited -
map<
K2, V2> (MapEntry< K2, V2> transform(T, V)) → Map<K2, V2> -
Returns a new map where all entries of this map are transformed by
the given
convert
function.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
-
putIfAbsent(
T key, V ifAbsent()) → V -
Look up the value of
key
, or add a new entry if it isn't there.override -
remove(
Object? key) → V? -
Removes
key
and its associated value, if present, from the map.override -
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
removeWhere(
bool test(T key, V value)) → void -
Removes all entries of this map that satisfy the given
test
.override -
retype<
K2, V2> () → Map< K2, V2> -
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
update(
T key, V update(V value), {V ifAbsent()?}) → V -
Updates the value for the provided
key
.override -
updateAll(
V update(T key, V value)) → void -
Updates all values.
override
Operators
-
operator ==(
Object? other) → bool -
The equality operator.
override
-
operator [](
Object? key) → V? -
The value for the given
key
, ornull
ifkey
is not in the map.inherited -
operator []=(
T key, V value) → void -
Associates the
key
with the givenvalue
.override