ViewProvider<T> class
The ViewProvider is the only provider that can watch other providers.
Its builder is similar to a normal Provider.
A common use case is to define a view model that depends on many providers.
Don't worry about the ref, you can use it freely inside any function.
The ref will never become invalid.
Set describeState to customize the description of the state.
See BaseNotifier.describeState.
Set debugLabel to customize the debug label of the provider.
Constructors
-
ViewProvider(T _builder(WatchableRef ref), {ProviderChangedCallback<
T> ? onChanged, String describeState(T state)?, String? debugLabel, bool debugVisibleInGraph = true})
Properties
- customDebugLabel → String?
-
A custom label used by debug tools.
finalinherited
- debugLabel → String
-
A label to be used in debug messages and
by the
RefenaTracingPage.no setterinherited - debugVisibleInGraph → bool
-
Set this flag to false to hide the provider from the
RefenaGraphPage. By default, all providers are visible in the graph. However, some providers add unnecessary noise.finalinherited - hashCode → int
-
The hash code for this object.
no setterinherited
-
provider
→ BaseProvider<
ViewProviderNotifier< T> , T> -
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createState(
Ref ref) → ViewProviderNotifier< T> -
getActualProvider(
BaseNotifier< Object?> notifier) → ViewProvider<T> -
inherited
-
getSelectedState(
ViewProviderNotifier< T> notifier, T state) → T -
The default behavior to return the whole state when
using
ref.watch(provider).inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
overrideWithBuilder(
T builder(WatchableRef)) → ProviderOverride< ViewProviderNotifier< T> , T> - Overrides with a predefined value.
-
select<
R> (R selector(T state)) → SelectedWatchable< ViewProviderNotifier< T> , T, R> -
Used for ref.watch(provider.select(...)).
Select a part of the state.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
Subclasses should not override this method.
It is used internally by RefenaContainer to map a provider to a state.
inherited
Static Methods
-
family<
T, P> (ViewFamilyBuilder< T, P> builder, {String describeState(T state)?, String? debugLabel, bool debugVisibleInGraph = true}) → ViewFamilyProvider<T, P> - A shorthand for ViewFamilyProvider.