import { EventEmitter, OnInit } from '@angular/core';
import { ColumnDefinition } from 'verben-ng-ui/src/lib/components/data-table';
import * as i0 from "@angular/core";
export declare class DataColumnsComponent<T> implements OnInit {
    columns: ColumnDefinition<T>[];
    enableDragAndDrop: boolean;
    maxVisibleItems: number;
    columnsUpdated: EventEmitter<ColumnDefinition<T>[]>;
    visibleColumns: ColumnDefinition<T>[];
    showAllColumns: boolean;
    draggedIndex: number | null;
    selectAll: boolean;
    columnVisibility: Map<string, boolean>;
    ngOnInit(): void;
    private initializeColumns;
    get columnsToShow(): ColumnDefinition<T>[];
    onDragStart(index: number, event: DragEvent): void;
    onDragOver(event: DragEvent): void;
    onDrop(index: number, event: DragEvent): void;
    private swapColumns;
    toggleSelectAll(): void;
    toggleColumnVisibility(columnId: string): void;
    isColumnVisible(columnId: string): boolean;
    private updateSelectAllStatus;
    getColumnHeader(column: ColumnDefinition<T>): string;
    resetColumns(): void;
    emitUpdatedColumns(): void;
    get activeColumnCount(): number;
    static ɵfac: i0.ɵɵFactoryDeclaration<DataColumnsComponent<any>, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DataColumnsComponent<any>, "lib-data-columns", never, { "columns": { "alias": "columns"; "required": false; }; "enableDragAndDrop": { "alias": "enableDragAndDrop"; "required": false; }; "maxVisibleItems": { "alias": "maxVisibleItems"; "required": false; }; }, { "columnsUpdated": "columnsUpdated"; }, never, never, false, never>;
}