delegate_builders.dart

delegate_builders library

Provides a simple API for defining state trees using delegate functions for message and transition handlers.

Classes

DataState<D> State Trees Message Handlers Transition Handlers: A data state with associated state data of type D.
FinalDataState<D>: A final data state in a state tree, with associated state data of type D.
FinalState: A final state in a state tree.
FinalStateConfig: The construction protocol for final tree states.
InitialChild: A callable class that can select the initial child state of a parent state, when the parent state is entered.
InitialData<D>: A callable class that can produce the initial data value for a data state, when the state is entered.
MachineState: A machine state in a state tree.
State State Trees Message Handlers Transition Handlers: A state in a state tree.
StateConfig: The construction protocol for tree states.
StateTree Getting Started State Trees: Defines a state tree that can be used in conjunction with a TreeStateMachine.

defaultRootKey → const StateKey: The key identifying the root state that is implicitly added to a state tree when using the StateTree.new constructor.

MachineDisposedHandler = FutureOr<TransitionMessageResult> Function(MessageContext msgCtx): Type of function that is called when the nested state machine in a MachineState is disposed.
MachineDoneHandler = FutureOr<TransitionMessageResult> Function(MessageContext msgCtx, CurrentState currentMachineState): Type of function that is called when a nested state machine in a MachineState completes.