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https://github.com/apache/cordova-android.git
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Change compass listener and optimize accelerometer listener.
This commit is contained in:
Bryce Curtis
+144
-65
@@ -6,90 +6,169 @@ function Compass() {
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/**
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* The last known Compass position.
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*/
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this.lastHeading = null;
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this.lastError = null;
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this.callbacks = {
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onHeadingChanged: [],
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onError: []
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};
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this.lastHeading = null;
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/**
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* List of compass watch timers
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*/
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this.timers = {};
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};
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Compass.STOPPED = 0;
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Compass.STARTING = 1;
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Compass.RUNNING = 2;
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Compass.ERROR_FAILED_TO_START = 3;
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Compass.ERROR_MSG = ["Not running", "Starting", "", "Failed to start"];
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/**
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* Asynchronously aquires the current heading.
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* @param {Function} successCallback The function to call when the heading
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* data is available
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* @param {Function} errorCallback The function to call when there is an error
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* getting the heading data.
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* @param {PositionOptions} options The options for getting the heading data
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* such as timeout.
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*
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* @param {Function} successCallback The function to call when the heading data is available
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* @param {Function} errorCallback The function to call when there is an error getting the heading data.
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* @param {PositionOptions} options The options for getting the heading data such as timeout.
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*/
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Compass.prototype.getCurrentHeading = function(successCallback, errorCallback, options) {
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if (this.lastHeading == null) {
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CompassHook.start();
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}
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else
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if (typeof successCallback == "function") {
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successCallback(this.lastHeading);
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}
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};
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// successCallback required
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if (typeof successCallback != "function") {
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console.log("Compass Error: successCallback is not a function");
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return;
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}
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// errorCallback optional
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if (errorCallback && (typeof errorCallback != "function")) {
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console.log("Compass Error: errorCallback is not a function");
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return;
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}
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// Get current compass status
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var status = CompassHook.getStatus();
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// If running, then call successCallback
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if (status == Compass.RUNNING) {
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try {
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var heading = CompassHook.getHeading();
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successCallback(heading);
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} catch (e) {
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console.log("Compass Error in successCallback: " + e);
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}
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}
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// If not running, then start it
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else {
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CompassHook.start();
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// Wait until started
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var timer = setInterval(function() {
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var status = CompassHook.getStatus();
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if (status != Compass.STARTING) {
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clearInterval(timer);
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// If compass is running
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if (status == Compass.RUNNING) {
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try {
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var heading = CompassHook.getHeading();
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successCallback(heading);
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} catch (e) {
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console.log("Compass Error in successCallback: " + e);
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}
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}
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// If compass error
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else {
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console.log("Compass Error: "+ Compass.ERROR_MSG[status]);
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try {
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if (errorCallback) {
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errorCallback(status);
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}
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} catch (e) {
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console.log("Compass Error in errorCallback: " + e);
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}
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}
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}
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}, 10);
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}
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}
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/**
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* Asynchronously aquires the heading repeatedly at a given interval.
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* @param {Function} successCallback The function to call each time the heading
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* data is available
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* @param {Function} errorCallback The function to call when there is an error
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* getting the heading data.
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* @param {HeadingOptions} options The options for getting the heading data
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* such as timeout and the frequency of the watch.
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*
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* @param {Function} successCallback The function to call each time the heading data is available
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* @param {Function} errorCallback The function to call when there is an error getting the heading data.
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* @param {HeadingOptions} options The options for getting the heading data such as timeout and the frequency of the watch.
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* @return String The watch id that must be passed to #clearWatch to stop watching.
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*/
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Compass.prototype.watchHeading= function(successCallback, errorCallback, options) {
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// Invoke the appropriate callback with a new Position object every time the implementation
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// determines that the position of the hosting device has changed.
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this.getCurrentHeading(successCallback, errorCallback, options);
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var frequency = 100;
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if (typeof(options) == 'object' && options.frequency)
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frequency = options.frequency;
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var self = this;
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return setInterval(function() {
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self.getCurrentHeading(successCallback, errorCallback, options);
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}, frequency);
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};
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// Default interval (100 msec)
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var frequency = (options != undefined) ? options.frequency : 100;
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// successCallback required
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if (typeof successCallback != "function") {
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console.log("Compass Error: successCallback is not a function");
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return;
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}
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// errorCallback optional
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if (errorCallback && (typeof errorCallback != "function")) {
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console.log("Compass Error: errorCallback is not a function");
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return;
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}
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// Make sure compass timeout > frequency + 10 sec
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var timeout = CompassHook.getTimeout();
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if (timeout < (frequency + 10000)) {
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CompassHook.setTimeout(frequency + 10000); // set to frequency + 10 sec
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}
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var id = PhoneGap.createUUID();
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CompassHook.start();
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// Start watch timer
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navigator.compass.timers[id] = setInterval(function() {
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var status = CompassHook.getStatus();
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// If compass is running
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if (status == Compass.RUNNING) {
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try {
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var heading = CompassHook.getHeading();
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successCallback(heading);
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} catch (e) {
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console.log("Compass Error in successCallback: " + e);
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}
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}
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// If compass had error
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else if (status != Compass.STARTING) {
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console.log("Compass Error: "+ Compass.ERROR_MSG[status]);
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try {
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navigator.compass.clearWatch(id);
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if (errorCallback) {
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errorCallback(status);
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}
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} catch (e) {
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console.log("Compass Error in errorCallback: " + e);
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}
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}
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}, (frequency ? frequency : 1));
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return id;
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}
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/**
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* Clears the specified heading watch.
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* @param {String} watchId The ID of the watch returned from #watchHeading.
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*
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* @param {String} id The ID of the watch returned from #watchHeading.
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*/
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Compass.prototype.clearWatch = function(watchId) {
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clearInterval(watchId);
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};
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Compass.prototype.clearWatch = function(id) {
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/**
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* Called by the geolocation framework when the current heading is found.
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* @param {HeadingOptions} position The current heading.
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*/
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Compass.prototype.setHeading = function(heading) {
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this.lastHeading = heading;
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for (var i = 0; i < this.callbacks.onHeadingChanged.length; i++) {
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var f = this.callbacks.onHeadingChanged.shift();
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f(heading);
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// Stop javascript timer & remove from timer list
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if (id && navigator.compass.timers[id]) {
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clearInterval(navigator.compass.timers[id]);
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delete navigator.compass.timers[id];
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}
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};
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/**
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* Called by the geolocation framework when an error occurs while looking up the current position.
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* @param {String} message The text of the error message.
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*/
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Compass.prototype.setError = function(message) {
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this.lastError = message;
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for (var i = 0; i < this.callbacks.onError.length; i++) {
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var f = this.callbacks.onError.shift();
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f(message);
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}
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};
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}
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PhoneGap.addConstructor(function() {
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if (typeof navigator.compass == "undefined") navigator.compass = new Compass();
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