# HG changeset patch
# User Nicholas Jillings <n.g.r.jillings@se14.qmul.ac.uk>
# Date 1434011889 -3600
# Node ID c311017f4f970b80719cf25193d743e063123c12
# Parent  13946f91f0a30c568116e2614904c59e17f2ffda
Removed selected track. audioEngineContext.play(id) now controls audioObject playbacks

diff -r 13946f91f0a3 -r c311017f4f97 ape.js
--- a/ape.js	Wed Jun 10 16:12:46 2015 +0100
+++ b/ape.js	Thu Jun 11 09:38:09 2015 +0100
@@ -227,30 +227,9 @@
 
 	audioEngineContext.loopPlayback = loopPlayback;
 	// Create AudioEngine bindings for playback
-	if (loopPlayback) {
-		audioEngineContext.selectedTrack = function(id) {
-			for (var i=0; i<this.audioObjects.length; i++)
-			{
-				if (id == i) {
-					this.audioObjects[i].loopStart();
-				} else {
-					this.audioObjects[i].loopStop();
-				}
-			}
-		};
-	} else {
-		audioEngineContext.selectedTrack = function(id) {
-			for (var i=0; i<this.audioObjects.length; i++)
-			{
-				this.audioObjects[i].outputGain.gain.value = 0.0;
-				this.audioObjects[i].stop();
-			}
-			if (this.status == 1) {
-				this.audioObjects[id].outputGain.gain.value = 1.0;
-				this.audioObjects[id].play(audioContext.currentTime+0.01);
-			}
-		};
-	}
+	audioEngineContext.selectedTrack = function(id) {
+		console.log('Deprecated');
+	};
 	
 	currentTestHolder = document.createElement('audioHolder');
 	currentTestHolder.id = audioHolderObject.id;
@@ -327,7 +306,7 @@
 			// Get the track ID from the object ID
 			var id = Number(event.srcElement.attributes['trackIndex'].value);
 			//audioEngineContext.metric.sliderPlayed(id);
-			audioEngineContext.selectedTrack(id);
+			audioEngineContext.play(id);
             // Currently playing track red, rest green
             
             //document.getElementById('track-slider-'+index).style.backgroundColor = "#FF0000";
diff -r 13946f91f0a3 -r c311017f4f97 core.js
--- a/core.js	Wed Jun 10 16:12:46 2015 +0100
+++ b/core.js	Thu Jun 11 09:38:09 2015 +0100
@@ -675,7 +675,7 @@
 	// Create store for new audioObjects
 	this.audioObjects = [];
 	
-	this.play = function() {
+	this.play = function(id) {
 		// Start the timer and set the audioEngine state to playing (1)
 		if (this.status == 0) {
 			// Check if all audioObjects are ready
@@ -684,12 +684,32 @@
 			}
 			if (this.audioObjectsReady == true) {
 				this.timer.startTest();
-				if (this.loopPlayback) {
-					for(var i=0; i<this.audioObjects.length; i++) {
-						this.audioObjects[i].play(this.timer.getTestTime()+1);
+				this.status = 1;
+			}
+		}
+		if (this.status== 1) {
+			if (id == undefined) {id = -1;}
+			if (this.loopPlayback) {
+				for (var i=0; i<this.audioObjects.length; i++)
+				{
+					this.audioObjects[i].play(this.timer.getTestTime()+1);
+					if (id == i) {
+						this.audioObjects[i].loopStart();
+					} else {
+						this.audioObjects[i].loopStop();
 					}
 				}
-				this.status = 1;
+			} else {
+				for (var i=0; i<this.audioObjects.length; i++)
+				{
+					if (i != id) {
+						this.audioObjects[i].outputGain.gain.value = 0.0;
+						this.audioObjects[i].stop();
+					} else if (i == id) {
+						this.audioObjects[id].outputGain.gain.value = 1.0;
+						this.audioObjects[id].play(audioContext.currentTime+0.01);
+					}
+				}
 			}
 		}
 	};
@@ -705,7 +725,6 @@
 		}
 	};
 	
-	
 	this.newTrack = function(element) {
 		// Pull data from given URL into new audio buffer
 		// URLs must either be from the same source OR be setup to 'Access-Control-Allow-Origin'
@@ -791,19 +810,21 @@
 	};
 	
 	this.play = function(startTime) {
-		this.bufferNode = audioContext.createBufferSource();
-		this.bufferNode.owner = this;
-		this.bufferNode.connect(this.outputGain);
-		this.bufferNode.buffer = this.buffer;
-		this.bufferNode.loop = audioEngineContext.loopPlayback;
-		this.bufferNode.onended = function() {
-			// Safari does not like using 'this' to reference the calling object!
-			event.srcElement.owner.metric.stopListening(audioEngineContext.timer.getTestTime());
-		};
-		if (this.bufferNode.loop == false) {
-			this.metric.startListening(audioEngineContext.timer.getTestTime());
+		if (this.bufferNode == undefined) {
+			this.bufferNode = audioContext.createBufferSource();
+			this.bufferNode.owner = this;
+			this.bufferNode.connect(this.outputGain);
+			this.bufferNode.buffer = this.buffer;
+			this.bufferNode.loop = audioEngineContext.loopPlayback;
+			this.bufferNode.onended = function() {
+				// Safari does not like using 'this' to reference the calling object!
+				event.srcElement.owner.metric.stopListening(audioEngineContext.timer.getTestTime());
+			};
+			if (this.bufferNode.loop == false) {
+				this.metric.startListening(audioEngineContext.timer.getTestTime());
+			}
+			this.bufferNode.start(startTime);
 		}
-		this.bufferNode.start(startTime);
 	};
 	
 	this.stop = function() {
diff -r 13946f91f0a3 -r c311017f4f97 example_eval/project.xml
--- a/example_eval/project.xml	Wed Jun 10 16:12:46 2015 +0100
+++ b/example_eval/project.xml	Thu Jun 11 09:38:09 2015 +0100
@@ -35,7 +35,7 @@
 			<metricEnable>elementListenTracker</metricEnable>
 		</Metric>
 	</setup>
-	<audioHolder id='0' hostURL="example_eval/" sampleRate="44100" randomiseOrder='true' repeatCount='0' loop='true' elementComments='true'>
+	<audioHolder id='0' hostURL="example_eval/" sampleRate="44100" randomiseOrder='true' repeatCount='0' loop='false' elementComments='true'>
 		<interface>
 			<title>Example Test Question</title>
 			<scale position="0">Min</scale>