ScopedValueState<TResult, TScopedValue extends ScopedValue<TResult> > class
abstract
State created by ScopedValue.
initValue], didUpdateValue, deactivate, and dispose are executed for each lifecycle of create, update, deactivate, and destroy.
After it is destroyed, disposed will be true.
You can get the ScopedValue of the creation source at value.
After ScopedValue is updated, value is updated.
You can get TResult at build.
Execute setState to update the associated widget.
ScopedValueで作成されるステート。
作成、更新、非有効化、破棄のライフサイクルごとにinitValue、didUpdateValue、deactivate、disposeが実行されます。
破棄された後はdisposedがtrueになります。
valueで作成元のScopedValueを取得できます。
ScopedValueが更新された後はvalueが更新されます。
buildでTResultを取得することができます。
setStateを実行すると関連付けられているウィジェットを更新することができます。
- Implementers
- Available Extensions
Constructors
Properties
- autoDisposeWhenUnreferenced → bool
-
Returns
trueif ScopedValue should be automatically discarded when it is no longer referenced by any widget.no setter - disposed → bool
-
trueafter the value is discarded.no setter - hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → TScopedValue
-
Returns the
TScopedValueof the creation source.no setter
Methods
-
build(
) → TResult -
Builder to return
TResult. -
deactivate(
) → void - If the widget is monitored by a widget, it is executed when the monitored widget is destroyed or otherwise removed.
-
didUpdateDescendant(
) → void - The original ScopedValue is notified when a ScopedValue executed through the internal Ref is updated.
-
didUpdateValue(
covariant TScopedValue oldValue) → void - Executed each time ScopedValue is called.
-
dispose(
) → void - Executed when the value is discarded.
-
equalsKeys(
List< Object> keys1, List<Object> keys2) → bool -
Used to check for updates with
keyswhen trying to update with setState in didUpdateValue. -
initValue(
) → void - Executed when a value is created.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
setState(
VoidCallback callback) → void - Notify associated widgets of updates.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited