ProviderElementBase<State> class
abstract
An internal class that handles the state of a provider.
Do not use.
- Implemented types
- Implementers
Constructors
-
ProviderElementBase(ProviderBase<
State> _provider) - Do not use.
Properties
- container → ProviderContainer
-
The ProviderContainer that owns this ProviderElementBase.
no setteroverride
- debugAssertDidSetStateEnabled → bool
-
Whether the assert that prevents requireState from returning
if the state was not set before is enabled.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether this ProviderElementBase is currently listened or not.
no setter
- mounted → bool
-
Whether the element was disposed or not
no setter
-
origin
→ ProviderBase<
State> -
The provider associated to this ProviderElementBase, before applying overrides.
no setter
-
provider
→ ProviderBase<
State> -
The provider associated to this ProviderElementBase, after applying overrides.
no setter
- requireState → State
-
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addListener(
ProviderBase< State> provider, void listener(State? previous, State next), {required bool fireImmediately, required void onError(Object error, StackTrace stackTrace)?}) → ProviderSubscription<State> -
dispose(
) → void - Called on ProviderContainer.dispose.
-
flush(
) → void -
getState(
) → Result< State> ? -
listen<
T> (ProviderListenable< T> listenable, void listener(T? previous, T value), {bool fireImmediately = false, void onError(Object error, StackTrace stackTrace)?}) → void Function() -
Listen to a provider and call
listenerwhenever its value changes.override -
markMustRecomputeState(
) → void -
mayNeedDispose(
) → void - Life-cycle for when a listener is removed.
-
mount(
) → void - Called the first time a provider is obtained.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
onDispose(
void listener()) → void -
Adds a listener to perform an operation right before the provider is destroyed.
override
-
read<
T> (ProviderBase< T> provider) → T -
Read the state associated with a provider, without listening to that provider.
override
-
readSelf(
) → State - Returns the currently exposed by a provider
-
refresh<
T> (ProviderBase< T> provider) → T -
Re-create the state of a provider and return the new state.
override
-
setState(
State newState) → void -
toString(
) → String -
A string representation of this object.
override
-
update(
ProviderBase< State> newProvider) → void - Called when the override of a provider changes.
-
visitAncestors(
void visitor(ProviderElementBase element)) → void - Visit the ProviderElementBases that this provider is listening to.
-
visitChildren(
void visitor(ProviderElementBase element)) → void - Visit the ProviderElements of providers that are listening to this element.
-
watch<
T> (ProviderListenable< T> listenable) → T -
Obtains the state of a provider and cause the state to be re-evaluated
when that provider emits a new value.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited