Bloc<S> class
abstract
The central class behind this library
It is responsible for processing all the events and broadcasting corresponding
changes made to the state.
R is the type which subclasses Bloc
S is the type of value which this bloc broadcasts. S must implement equality
Constructors
-
Bloc({S? initialState, BlocMonitor<
Bloc, dynamic> monitor = const BlocEventsPrinter()}) -
initialStateis the state which is set at initialization. if its null, the initial state is set to busy.
Properties
- error → dynamic
-
no setter
- hasError → bool
-
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasState → bool
-
no setter
- isBusy → bool
-
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- state → S
-
no setter
-
stream
→ Stream<
S?> -
Broadcast Stream to which all builders listen
no setter
Methods
-
addListener(
BlocListener callback) → void - Adds a callback function to the list on active callbacks
-
close(
) → Future< void> - Send a done event and disposes the stream
-
nextState(
S? currentState, S update) → S? - Called to calculate the new state
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
BlocEventType type) → void - Calls all callbacks currently active
-
onActivate(
) → void - Called when Bloc get the first listener and stream is created
-
onDeactivate(
) → void - Called when Bloc has no more listeners and stream is being closed
-
refresh(
) → void - Broadcasts the same state
-
removeListener(
BlocListener callback) → void - Removes a callback function from the list
-
setBusy(
{String? event}) → void - Called by blocs (subclasses) when the updated state isn't available immediately
-
setError(
dynamic error, {String? event}) → void - Called by blocs (subclasses) when an error occurs
-
setState(
S update, {String? event}) → void - Called by blocs (subclasses) when the state is updated
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited