types/index.d.ts

// Type definitions for Apache Cordova Device Orientation plugin
// Project: https://github.com/apache/cordova-plugin-device-orientation
// Definitions by: Microsoft Open Technologies Inc <http://msopentech.com>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// 
// Copyright (c) Microsoft Open Technologies Inc
// Licensed under the MIT license. 

interface Navigator {
    /** 
     * This plugin provides access to the device's compass. The compass is a sensor that detects
     * the direction or heading that the device is pointed, typically from the top of the device.
     * It measures the heading in degrees from 0 to 359.99, where 0 is north.
     */
    compass: Compass;
}

/** 
 * This plugin provides access to the device's compass. The compass is a sensor that detects
 * the direction or heading that the device is pointed, typically from the top of the device.
 * It measures the heading in degrees from 0 to 359.99, where 0 is north.
 */
interface Compass {
    /**
     * Get the current compass heading. The compass heading is returned via a CompassHeading
     * object using the onSuccess callback function.
     * @param onSuccess Success callback that passes CompassHeading object.
     * @param onError Error callback that passes CompassError object.
     */
    getCurrentHeading(
        onSuccess: (heading: CompassHeading) => void,
        onError: (error: CompassError) => void,
        options?: CompassOptions): void;
    /**
     * Gets the device's current heading at a regular interval. Each time the heading is retrieved,
     * the headingSuccess callback function is executed. The returned watch ID references the compass
     * watch interval. The watch ID can be used with navigator.compass.clearWatch to stop watching
     * the navigator.compass.
     * @param onSuccess Success callback that passes CompassHeading object.
     * @param onError   Error callback that passes CompassError object.
     * @param options   CompassOptions object
     */
    watchHeading(
        onSuccess: (heading: CompassHeading) => void,
        onError: (error: CompassError) => void,
        options?: CompassOptions): number;
    /**
     * Stop watching the compass referenced by the watch ID parameter.
     * @param id The ID returned by navigator.compass.watchHeading.
     */
    clearWatch(id: number): void;
}

/** A CompassHeading object is returned to the compassSuccess callback function. */
interface CompassHeading {
    /** The heading in degrees from 0-359.99 at a single moment in time. */
    magneticHeading: number;
    /** The heading relative to the geographic North Pole in degrees 0-359.99 at a single moment in time. A negative value indicates that the true heading can't be determined. */
    trueHeading: number;
    /** The deviation in degrees between the reported heading and the true heading. */
    headingAccuracy: number;
    /** The time at which this heading was determined. */
    timestamp: number;
}

interface CompassOptions {
    filter?: number;
    frequency?: number;
}

/** A CompassError object is returned to the onError callback function when an error occurs. */
interface CompassError {
    /**
     * One of the predefined error codes
     *     CompassError.COMPASS_INTERNAL_ERR
     *     CompassError.COMPASS_NOT_SUPPORTED
     */
    code: number;
}

declare var CompassError: {
    /** Constructor for CompassError object */
    new(code: number): CompassError;
    COMPASS_INTERNAL_ERR: number;
    COMPASS_NOT_SUPPORTED: number
}