NotifierListener<N extends BaseNotifier<S> , S extends Object?> class
A widget that listens to state changes from a BaseNotifier and triggers side effects.
NotifierListener does not rebuild its child when the state changes, but instead
calls the listener callback for side effects, optionally using listenWhen to control when to listen.
N is the type of BaseNotifier and S is the type of state managed by the notifier.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- SingleChildStatefulWidget
- NotifierListener
- Implemented types
- Implementers
Constructors
-
NotifierListener.new({required Widget child, required void listener(S state), ShouldProceedCallback<
S> ? listenWhen, void onInit(N notifier)?, Key? key}) -
Creates a NotifierListener.
const
Properties
-
builder
→ BuilderCallback<
S> ? -
Function to build the widget based on the current state and optional child.
finalinherited
-
buildWhen
→ ShouldProceedCallback<
S> ? -
Function to determine if the widget should rebuild when state changes.
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- listener → void Function(S state)?
-
Function to execute when state changes without triggering a rebuild.
finalinherited
-
listenWhen
→ ShouldProceedCallback<
S> ? -
Function to determine if the listener should be called when state changes.
finalinherited
- onInit → void Function(N notifier)?
-
Function to execute when the widget is first created.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → SingleChildStatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< StatefulWidget> -
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.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent 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.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → 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 ==(
Object other) → bool -
The equality operator.
inherited