ValueListenableProvider<T> class
Listens to a ValueListenable and expose its current value.
- Inheritance
- Object
- Diagnosticable
- DiagnosticableTree
- Widget
- StatefulWidget
- DelegateWidget
- ValueDelegateWidget<
ValueListenable< T> > - ValueListenableProvider
- Implemented types
Constructors
-
ValueListenableProvider({Key key, @Deprecated('Will be removed as part of 4.0.0, use update instead') ValueBuilder<
ValueNotifier< builder, @required ValueBuilder<T> >ValueNotifier< create, UpdateShouldNotify<T> >T> updateShouldNotify, Widget child }) -
Creates a ValueNotifier using
create
and automatically dispose it when ValueListenableProvider is removed from the tree. [...] -
ValueListenableProvider.value({Key key, @required ValueListenable<
T> value, UpdateShouldNotify<T> updateShouldNotify, Widget child }) -
Listens to
value
and exposes its current value. [...]
Properties
- child → Widget
-
The widget that is below the current ValueListenableProvider widget in
the tree. [...]
final
-
updateShouldNotify
→ UpdateShouldNotify<
T> -
updateShouldNotify can optionally be passed to avoid unnecessarily
rebuilding dependents when nothing changed. Defaults to
(previous, next) => previous != next
. SeeInheritedWidget.updateShouldNotify
for more information.final -
delegate
→ ValueStateDelegate<
ValueListenable< T> > -
The current state of DelegateWidget. [...]
@protected, read-only, inherited
- hashCode → int
-
The hash code for this object.
read-only, inherited
- key → Key
-
Controls how one widget replaces another widget in the tree. [...]
final, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget. [...]
override
-
cloneWithChild(
Widget child) → ValueListenableProvider< T> -
Clones the current provider with a new
child
. [...]override -
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
-
createState(
) → _DelegateWidgetState -
Creates the mutable state for this widget at a given location in the tree. [...]
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children. [...]
@protected, inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String name, DiagnosticsTreeStyle style }) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep. [...]
inherited
-
toString(
{DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns a string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns a string representation of this node and its descendants. [...]
inherited
-
toStringShallow(
{String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns a one-line detailed description of the object. [...]
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator.
inherited