BasicDataProvider<T> class
abstract
A basic provider to provide a single data object with type T
- Mixed-in types
Constructors
- BasicDataProvider({bool manual = false})
-
manual = truemean don't fetch data at create time
Properties
- data → T?
-
Get value
datano setter - error → dynamic
-
Get
errorvalueno setter - hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- isEmpty → bool
-
Get status of
data. Returntrueifdata == null.no setter - isError → bool
-
Get
errorstatusno setter - isLoading → bool
-
Get
loadingstatusno setter - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the
object is not in a usable state and should be discarded (calls to
addListener will throw after the object is disposed).
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
onFetch(
) → Future< T> -
Called when trying to fetch data.
Must return the fetched data or throw an
errorif it's failed to fetch. -
onUpdate(
T newData) → Future< T> -
Called when trying to update the data.
Must return the new data, or throw and
errorwhen it's failed to update. -
refresh(
{bool isQuiet = false}) → Future< void> -
Refresh value of
databy recallfetchdata. -
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
update(
T newData, {bool isQuiet = false}) → Future< void> -
Update data by
newData. SetisQuiet = trueto avoid rendering loading state, defaultfalse.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited