import { ToolbarAction } from '../ExtensionBase.ts';
import { RenderManager } from '../../render/RenderManager.ts';
import { MeasureExtension } from './index.ts';
export declare class ToolBase {
    /** Whether the measurement command is active or not. */
    isActive: boolean;
    protected renderManager: RenderManager;
    protected ext: MeasureExtension;
    readonly name: string;
    actions: ToolbarAction[];
    updater: number;
    constructor(ext: MeasureExtension, name: string);
    commandChanged(): void;
    update(): void;
}