reorg of project assets

2026-04-23 00:00:09 +08:00 · 2010-01-26 13:54:02 -08:00
parent fc6f2f5d39
commit e3dc010b97
33 changed files with 360 additions and 377 deletions
@@ -0,0 +1,96 @@
+/**
+ * This class provides access to device Compass data.
+ * @constructor
+ */
+function Compass() {
+    /**
+     * The last known Compass position.
+     */
+	this.lastHeading = null;
+    this.lastError = null;
+	this.callbacks = {
+		onHeadingChanged: [],
+        onError:           []
+    };
+};
+
+/**
+ * Asynchronously aquires the current heading.
+ * @param {Function} successCallback The function to call when the heading
+ * data is available
+ * @param {Function} errorCallback The function to call when there is an error 
+ * getting the heading data.
+ * @param {PositionOptions} options The options for getting the heading data
+ * such as timeout.
+ */
+Compass.prototype.getCurrentHeading = function(successCallback, errorCallback, options) {
+	if (this.lastHeading == null) {
+		this.start(options);
+	}
+	else 
+	if (typeof successCallback == "function") {
+		successCallback(this.lastHeading);
+	}
+};
+
+/**
+ * Asynchronously aquires the heading repeatedly at a given interval.
+ * @param {Function} successCallback The function to call each time the heading
+ * data is available
+ * @param {Function} errorCallback The function to call when there is an error 
+ * getting the heading data.
+ * @param {HeadingOptions} options The options for getting the heading data
+ * such as timeout and the frequency of the watch.
+ */
+Compass.prototype.watchHeading= function(successCallback, errorCallback, options) {
+	// Invoke the appropriate callback with a new Position object every time the implementation 
+	// determines that the position of the hosting device has changed. 
+	
+	this.getCurrentHeading(successCallback, errorCallback, options);
+	var frequency = 100;
+    if (typeof(options) == 'object' && options.frequency)
+        frequency = options.frequency;
+
+	var self = this;
+	return setInterval(function() {
+		self.getCurrentHeading(successCallback, errorCallback, options);
+	}, frequency);
+};
+
+
+/**
+ * Clears the specified heading watch.
+ * @param {String} watchId The ID of the watch returned from #watchHeading.
+ */
+Compass.prototype.clearWatch = function(watchId) {
+	clearInterval(watchId);
+};
+
+
+/**
+ * Called by the geolocation framework when the current heading is found.
+ * @param {HeadingOptions} position The current heading.
+ */
+Compass.prototype.setHeading = function(heading) {
+    this.lastHeading = heading;
+    for (var i = 0; i < this.callbacks.onHeadingChanged.length; i++) {
+        var f = this.callbacks.onHeadingChanged.shift();
+        f(heading);
+    }
+};
+
+/**
+ * Called by the geolocation framework when an error occurs while looking up the current position.
+ * @param {String} message The text of the error message.
+ */
+Compass.prototype.setError = function(message) {
+    this.lastError = message;
+    for (var i = 0; i < this.callbacks.onError.length; i++) {
+        var f = this.callbacks.onError.shift();
+        f(message);
+    }
+};
+
+PhoneGap.addConstructor(function() {
+    if (typeof navigator.compass == "undefined") navigator.compass = new Compass();
+});