@ue-too/board / index / expandKmtInputStateMachine

函式: expandKmtInputStateMachine()

expandKmtInputStateMachine<E, C, S, O>(context, define, initialState): TemplateStateMachine<E, C, S, O>

定義於: packages/board/src/input-interpretation/input-state-machine/kmt-input-state-machine.ts:862

Builds a KMT input state machine with more events, states, context or outputs than the stock one, reusing every built-in state.

型別參數

E

E extends KmtInputEventMapping

C

C extends KmtInputContext

S

S extends string

O

O extends KmtInputEventOutputMapping & Partial<Record<keyof E, unknown>>

參數

context

C

The expanded context; must satisfy KmtInputContext

define

["IDLE" | "READY_TO_PAN_VIA_SPACEBAR" | "READY_TO_PAN_VIA_SCROLL_WHEEL" | "PAN" | "INITIAL_PAN" | "PAN_VIA_SCROLL_WHEEL" | "DISABLED"] extends [S] ? KmtInputStateMachineExpansion<E, C, S, O> : object

Receives the stock states and an extend helper, returns the expanded state map. See KmtInputStateMachineExpansion.

initialState

S = ...

Defaults to 'IDLE'

回傳

TemplateStateMachine<E, C, S, O>

A machine over the expanded generics

備註

The generics must be supersets of the stock ones: E extends KmtInputEventMapping, C extends KmtInputContext, O extends KmtInputEventOutputMapping, and S must include every KmtInputStates member (a type error otherwise). Shared events must keep the stock payload. Untouched stock states keep their stock behaviour and simply ignore events they do not know.

範例

type ExpEvents = KmtInputEventMapping & { rightPointerUp: PointerEventPayload };
type ExpStates = KmtInputStates | 'PLACEMENT';
type ExpOut = KmtInputEventOutputMapping & { rightPointerUp: KmtOutputEvent };

const machine = expandKmtInputStateMachine<ExpEvents, ExpContext, ExpStates, ExpOut>(
    context,
    (stock, extend) => ({
        ...stock,
        IDLE: extend(stock.IDLE, {
            eventReactions: { rightPointerUp: { action: openMenu, defaultTargetState: 'PLACEMENT' } },
        }),
        PLACEMENT: new PlacementState(),
    })
);