import { ValidatorFn } from "@angular/forms";
import { RealsoftDateRangeInputPartBase } from "./datepicker-range-input-base";
import { DateRange, RealsoftDateSelectionModelChange } from "./models";
import * as i0 from "@angular/core";
export declare class RealsoftStartDate<D> extends RealsoftDateRangeInputPartBase<D> {
    private _startValidator;
    protected validator: ValidatorFn;
    protected _register(): void;
    protected getValueFromModel(modelValue: DateRange<D>): D;
    protected shouldHandleChangeEvent(change: RealsoftDateSelectionModelChange<DateRange<D>>): boolean;
    protected assignValueToModel(value: D | null): void;
    onKeyDown(event: KeyboardEvent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<RealsoftStartDate<any>, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<RealsoftStartDate<any>, "input[realsoftStartDate]", never, {}, { "dateChange": "dateChange"; "dateInput": "dateInput"; }, never, never, true, never>;
}