PersistentContext class
Provides persistent data from shared preferences to all the descending widgets and allows to update it synchronously.
Variables are read and written as simple key-values pairs, where the key is a generic String and the value has any of the following: String, int, double, bool.
For a more robust implementation it is reccomended that you extend this class and add getters and setters for variable, as needed by your application.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- ProxyWidget
- InheritedWidget
- InheritedNotifier<
PersistentContextNotifier> - PersistentContext
Constructors
Properties
- child → Widget
-
The widget below this widget in the tree.
finalinherited
-
defaultValues
→ Map<
String, dynamic> -
A map of default values for each variable
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- notifier → PersistentContextNotifier?
-
The Listenable object to which to listen.
finalinherited
- prefix → String
-
A prefix for local preferences names, that can be used to have variables
with the same name in different contexts of the same app
final
-
ready
→ Future<
bool> -
A future that completes with
true
when shared preferences are loaded and ready to be used. It will imediately complete if the optionalSharedPreferences
instance is passed to the constructor.no setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → InheritedElement -
Inflates this configuration to a concrete instance.
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
-
get(
String key) → dynamic -
Gets a persistent record value given its
key
. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
set(
String key, dynamic value) → void -
Sets a persistent record given a
key
andvalue
. -
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}) → 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
-
updateShouldNotify(
covariant InheritedNotifier< PersistentContextNotifier> oldWidget) → bool -
Whether the framework should notify widgets that inherit from this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
of(
BuildContext context) → PersistentContext - The PersistentContext instance for the given BuildContext