KState/ca.acendas.kstate.observers/StateObserver

StateObserver

Interface for observing state changes.

State observers are notified when state transitions occur, allowing for reactive programming patterns and side effects to be handled separately from state logic.

Parameters

The type of state being observed

Functions

filter

fun <T> StateObserver<T>.filter(predicate: (T, T) -> Boolean): StateObserver<T>

Creates a StateObserver that only reacts when a predicate is satisfied.

filterType

inline fun <T, R : T> StateObserver<T>.filterType(): StateObserver<T>

Creates a StateObserver that only reacts to specific state types.

onlyChanges

fun <T> StateObserver<T>.onlyChanges(): StateObserver<T>

Creates a StateObserver that only reacts to actual state changes (not same state).

onlyNew

fun <T> StateObserver<T>.onlyNew(): StateObserver<T>

Convenience observer that only cares about the new state.

onStateChanged

abstract fun onStateChanged(oldState: T, newState: T)

Called when a state change occurs.