import { ResourceRef, Signal } from "@angular/core";
import { SdSheetColumnDirective } from "../directives/sd-sheet-column.directive";
import { ISdSheetConfig } from "../types/ISdSheetConfig";
import { ISdSheetColumnDef } from "../types/ISdSheetColumnDef";
import { ISdSheetHeaderDef } from "../types/ISdSheetHeaderDef";
export declare class SdSheetLayoutEngine<T> {
    private readonly _options;
    constructor(_options: {
        columnControls: Signal<ReadonlyArray<SdSheetColumnDirective<T>>>;
        config: ResourceRef<ISdSheetConfig | undefined>;
    });
    columnDefs: Signal<ISdSheetColumnDef<T>[]>;
    private readonly _rawHeaderDefTable;
    headerDefTable: Signal<(ISdSheetHeaderDef | undefined)[][]>;
    hasSummary: Signal<boolean>;
    headerFeatureRowSpan: Signal<number>;
}