import { ExtensionBase, ViewpointState } from '../../index';
import { RenderSettingsState } from './RenderSettingsState';
/**
 * Viewer settings extension.
 */
export declare class SettingsExtension extends ExtensionBase implements ViewpointState {
    static getName: () => string;
    /**General extension data which can be stored in browser local storage and restored after.
     *State will be saved in local storage with 'tangl-ext-extensionName' key.
     */
    state: RenderSettingsState;
    private sharedToolbar;
    /**
     * @param viewerName - Owner viewer name.
     * @param options - additional options for extension.
     */
    constructor(viewerName: string, options: {
        saveStateHandler?: (stateName: string, state: any) => void;
        restoreStateHandler?: (stateName: string, state: any) => Promise<any>;
    });
    initKeymap(): void;
    sharedToolbarRender(container: HTMLElement): void;
    storeViewpointState(): any;
    restoreViewpointState(state: any): void;
    added(): Promise<void>;
    deleted(): void;
    setFog(): void;
    setShadow(): void;
    applyState(): void;
}