import { Observable } from "rxjs";
import { ITimelineZoom, TimelineViewMode } from "./zoom";
export interface IIndexedZoom<ViewMode = TimelineViewMode> extends ITimelineZoom<ViewMode> {
    index: number;
}
export interface IZoomsHandler<ViewMode> {
    activeZoom$: Observable<IIndexedZoom<ViewMode>>;
    readonly activeZoom: IIndexedZoom<ViewMode>;
    readonly zooms: IIndexedZoom<ViewMode>[];
    setZooms(zooms: ITimelineZoom<ViewMode>[]): void;
    getFirstZoom(): IIndexedZoom<ViewMode>;
    getLastZoom(): IIndexedZoom<ViewMode>;
    zoomIn(): void;
    zoomOut(): void;
    changeActiveZoom(zoom: ITimelineZoom<ViewMode>): void;
    isZoomActive(zoom: ITimelineZoom<ViewMode>): boolean;
}