/// <reference path="../../pxtlib.d.ts" />
import * as Blockly from "blockly";
import { FieldSlider } from "../plugins/math";
import { FieldCustomOptions, FieldCustom } from "./field_utils";
export interface FieldProtractorOptions extends FieldCustomOptions {
}
export declare class FieldProtractor extends FieldSlider implements FieldCustom {
    isFieldCustom_: boolean;
    private params;
    private circleSVG;
    private circleBar;
    private reporter;
    /**
     * Class for a color wheel field.
     * @param {number|string} value The initial content of the field.
     * @param {Function=} opt_validator An optional function that is called
     *     to validate any constraints on what the user entered.  Takes the new
     *     text as an argument and returns either the accepted text, a replacement
     *     text, or null to abort the change.
     * @extends {Blockly.FieldNumber}
     * @constructor
     */
    constructor(value_: any, params: FieldProtractorOptions, opt_validator?: Blockly.FieldValidator);
    createLabelDom_(labelText: string): [HTMLDivElement, HTMLSpanElement];
    setReadout(value: string | number): void;
    private updateAngle;
}