import { GridColumnDef, GridSortState, GridFilterState, GridGroupState } from '../models';
import * as i0 from "@angular/core";
export interface GridPersistedState {
    columnWidths: Record<string, number>;
    columnOrder: string[];
    sorts: GridSortState[];
    filters: GridFilterState[];
    groups: GridGroupState[];
    page: number;
    pageSize: number;
    hiddenColumns: string[];
    pinnedColumns: Record<string, 'left' | 'right' | null>;
}
export declare class GridStateService {
    /**
     * Save grid state to localStorage
     * @param key Storage key
     * @param state The state object to persist
     */
    saveState(key: string, state: GridPersistedState): void;
    /**
     * Load grid state from localStorage
     * @param key Storage key
     * @returns The persisted state or null if not found
     */
    loadState(key: string): GridPersistedState | null;
    /**
     * Clear persisted state
     * @param key Storage key
     */
    clearState(key: string): void;
    /**
     * Merge loaded state with current column definitions
     * @param state The loaded state
     * @param columns The default column definitions
     * @returns Array of column definitions updated with the state
     */
    applyState(state: GridPersistedState, columns: GridColumnDef[]): GridColumnDef[];
    static ɵfac: i0.ɵɵFactoryDeclaration<GridStateService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<GridStateService>;
}