MultiValueNotifier<T> class
多个相同值监听。
如像监听同一控件的2级或者多级状态变更时使用次控件。
关于更新其中一个值的时候。
- 使用方法更新
MultiValueNotifier.indexValue(index, value);
- 使用运算符
MultiValueNotifier[index] = value;
!!! 注意 !!!
切勿使用value的GET方法获取更新
- Inheritance
-
- Object
- ChangeNotifier
- MultiValueNotifier
- Implemented types
-
- ValueListenable<
List< T> >
- ValueListenable<
Constructors
-
MultiValueNotifier(List<
T> _value)
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
value
↔ List<
T> -
The current value of the object. When the value changes, the callbacks
registered with addListener will be invoked.
getter/setter pairoverride-getter
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
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
-
indexValue(
T newValue, int index) → void -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
-
operator [](
int index) → T -
operator []=(
int index, T newValue) → void