import type { AgStudioSelectorType } from '../../api/agStudioSelector';
import type { StudioIcon } from '../../api/icons';
import type { _AgComponentSelector } from 'ag-grid-enterprise';
import { Component } from '../core/component';
import type { WidgetFieldRequirements } from '../interfaces/widgetParams';
import type { AgFieldSelectionEvent } from '../panels/components/agFieldSelection';
export interface WidgetPanelFieldAddParams {
    placeholder?: string;
}
export declare class AddFieldButton extends Component<AgFieldSelectionEvent['type']> {
    private readonly params?;
    private readonly icon;
    private readonly title;
    private dropdown;
    private enabled;
    constructor(params?: WidgetPanelFieldAddParams | undefined);
    postConstruct(): void;
    setRequirements(requirements: WidgetFieldRequirements | undefined): void;
    setEnabled(enabled: boolean): void;
    setIcon(placeholderIcon: StudioIcon | undefined): void;
    setPlaceholder(placeholder?: string): void;
    toggleDropPreviewActive(active: boolean): void;
}
export declare const AddFieldButtonSelector: _AgComponentSelector<AgStudioSelectorType>;