import { LitElement } from 'lit';
import { ViewerSettings } from './viewer-settings';
export declare class ControlPanel extends LitElement {
    currentViewModeIndex: number;
    isColumnMode: boolean;
    viewerSettings: ViewerSettings;
    render(): import('lit-html').TemplateResult<1>;
    private _handleSelectionChanged;
    static styles: import('lit').CSSResult;
}