--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/accelerometer.js	Tue Jul 06 11:31:19 2010 -0700
@@ -0,0 +1,138 @@
+/**
+ * This class provides access to device accelerometer data.
+ * @constructor
+ */
+function Accelerometer() {
+	/**
+	 * The last known acceleration.
+	 */
+	this.lastAcceleration = null;
+}
+
+/**
+ * Asynchronously aquires the current acceleration.
+ * @param {Function} successCallback The function to call when the acceleration
+ * data is available
+ * @param {Function} errorCallback The function to call when there is an error 
+ * getting the acceleration data.
+ * @param {AccelerationOptions} options The options for getting the accelerometer data
+ * such as timeout.
+ */
+
+Accelerometer.prototype.getCurrentAcceleration = function(successCallback, errorCallback, options) {
+	// If the acceleration is available then call success
+	// If the acceleration is not available then call error
+	
+	try {
+		if (!this.serviceObj) 
+			this.serviceObj = this.getServiceObj();
+		
+		if (this.serviceObj == null) 
+			throw {
+				name: "DeviceErr",
+				message: "Could not initialize service object"
+			};
+		
+		//get the sensor channel
+		var SensorParams = {
+			SearchCriterion: "AccelerometerAxis"
+		};
+		var returnvalue = this.serviceObj.ISensor.FindSensorChannel(SensorParams);
+		var error = returnvalue["ErrorCode"];
+		var errmsg = returnvalue["ErrorMessage"];
+		if (!(error == 0 || error == 1012)) {
+			var ex = {
+				name: "Unable to find Sensor Channel: " + error,
+				message: errmsg
+			};
+			throw ex;
+		}
+		var channelInfoMap = returnvalue["ReturnValue"][0];
+		var criteria = {
+			ChannelInfoMap: channelInfoMap,
+			ListeningType: "ChannelData"
+		};
+		
+		if (typeof(successCallback) != 'function') 
+			successCallback = function(){
+			};
+		if (typeof(errorCallback) != 'function') 
+			errorCallback = function(){
+			};
+		
+		this.success_callback = successCallback;
+		this.error_callback = errorCallback;
+		//create a closure to persist this instance of Accelerometer into the RegisterForNofication callback
+		var obj = this;
+		
+		// TODO: this call crashes WRT, but there is no other way to read the accel sensor
+		// http://discussion.forum.nokia.com/forum/showthread.php?t=182151&highlight=memory+leak
+		this.serviceObj.ISensor.RegisterForNotification(criteria, function(transId, eventCode, result){
+			try {
+				var criteria = {
+					TransactionID: transId
+				};
+				obj.serviceObj.ISensor.Cancel(criteria);
+				
+				var accel = new Acceleration(result.ReturnValue.XAxisData, result.ReturnValue.YAxisData, result.ReturnValue.ZAxisData);
+				Accelerometer.lastAcceleration = accel;
+				
+				obj.success_callback(accel);
+				
+			} 
+			catch (ex) {
+				obj.serviceObj.ISensor.Cancel(criteria);
+				obj.error_callback(ex);
+			}
+			
+		});
+	} catch (ex) {
+		errorCallback(ex);
+	}
+
+};
+
+
+/**
+ * Asynchronously aquires the acceleration repeatedly at a given interval.
+ * @param {Function} successCallback The function to call each time the acceleration
+ * data is available
+ * @param {Function} errorCallback The function to call when there is an error 
+ * getting the acceleration data.
+ * @param {AccelerationOptions} options The options for getting the accelerometer data
+ * such as timeout.
+ */
+
+Accelerometer.prototype.watchAcceleration = function(successCallback, errorCallback, options) {
+	this.getCurrentAcceleration(successCallback, errorCallback, options);
+	// TODO: add the interval id to a list so we can clear all watches
+ 	var frequency = (options != undefined)? options.frequency : 10000;
+	return setInterval(function() {
+		navigator.accelerometer.getCurrentAcceleration(successCallback, errorCallback, options);
+	}, frequency);
+};
+
+/**
+ * Clears the specified accelerometer watch.
+ * @param {String} watchId The ID of the watch returned from #watchAcceleration.
+ */
+Accelerometer.prototype.clearWatch = function(watchId) {
+	clearInterval(watchId);
+};
+
+//gets the Acceleration Service Object from WRT
+Accelerometer.prototype.getServiceObj = function() {
+	var so;
+	
+    try {
+        so = device.getServiceObject("Service.Sensor", "ISensor");
+    } catch (ex) {
+		throw {
+			name: "DeviceError",
+			message: "Could not initialize accel service object (" + ex.name + ": " + ex.message + ")"
+		};
+    }		
+	return so;
+};
+
+if (typeof navigator.accelerometer == "undefined") navigator.accelerometer = new Accelerometer();
\ No newline at end of file