import { int, Notifier, Observer, Option, Subscription, Terminable } from "@opendaw/lib-std";
import { BoxAdaptersContext } from "../BoxAdaptersContext";
import { ppqn } from "@opendaw/lib-dsp";
import { SignatureEventBoxAdapter } from "./SignatureEventBoxAdapter";
import { Signature, SignatureTrack, TimelineBox } from "@opendaw/studio-boxes";
export type SignatureEvent = Readonly<{
    index: int;
    accumulatedPpqn: ppqn;
    accumulatedBars: int;
    nominator: int;
    denominator: int;
}>;
export declare class SignatureTrackAdapter implements Terminable {
    #private;
    readonly changeNotifier: Notifier<void>;
    constructor(context: BoxAdaptersContext, signature: Signature, signatureTrack: SignatureTrack);
    subscribe(observer: Observer<void>): Subscription;
    get context(): BoxAdaptersContext;
    get enabled(): boolean;
    get object(): TimelineBox["signatureTrack"];
    get size(): int;
    get storageSignature(): Readonly<[int, int]>;
    nonEmpty(): boolean;
    /** @internal */
    dispatchChange(): void;
    signatureAt(position: ppqn): Readonly<[int, int]>;
    iterateAll(): IterableIterator<SignatureEvent>;
    changeSignature(nominator: int, denominator: int): void;
    deleteAdapter(adapter: SignatureEventBoxAdapter): void;
    createEvent(position: ppqn, nominator: int, denominator: int): void;
    adapterAt(index: int): Option<SignatureEventBoxAdapter>;
    moveEvent(adapter: SignatureEventBoxAdapter, targetPpqn: ppqn): void;
    floorToBar(position: ppqn): ppqn;
    ceilToBar(position: ppqn): ppqn;
    roundToBar(position: ppqn): ppqn;
    toParts(position: ppqn): {
        bars: int;
        beats: int;
        semiquavers: int;
        ticks: int;
    };
    barLengthAt(position: ppqn): ppqn;
    getBarInterval(position: ppqn): {
        position: ppqn;
        complete: ppqn;
    };
    terminate(): void;
}
//# sourceMappingURL=SignatureTrackAdapter.d.ts.map