comparison ape.js @ 937:b5262d076f0b

Merge 'default' and 'Dev_main' branch

+/**
+ *  ape.js
+ *  Create the APE interface
+ */
+
+var currentState; // Keep track of the current state (pre/post test, which test, final test? first test?)
+// preTest - In preTest state
+// testRun-ID - In test running, test Id number at the end 'testRun-2'
+// testRunPost-ID - Post test of test ID
+// testRunPre-ID - Pre-test of test ID
+// postTest - End of test, final submission!
+
+
+// Create empty array to log whether different samples have been played
+var hasBeenPlayed = []; // HERE?
+
+
+// Once this is loaded and parsed, begin execution
+loadInterface(projectXML);
+
+function loadInterface(xmlDoc) {
+	
+	// Get the dimensions of the screen available to the page
+	var width = window.innerWidth;
+	var height = window.innerHeight;
+	
+	// The injection point into the HTML page
+	var insertPoint = document.getElementById("topLevelBody");
+	var testContent = document.createElement('div');
+	testContent.id = 'testContent';
+	
+	
+	// Decode parts of the xmlDoc that are needed
+	// xmlDoc MUST already be parsed by jQuery!
+	var xmlSetup = xmlDoc.find('setup');
+	// Should put in an error function here incase of malprocessed or malformed XML
+	
+	// Extract the different test XML DOM trees
+	var audioHolders = xmlDoc.find('audioHolder');
+	audioHolders.each(function(index,element) {
+		var repeatN = element.attributes['repeatCount'].value;
+		for (var r=0; r<=repeatN; r++) {
+			testXMLSetups[testXMLSetups.length] = element;
+		}
+	});
+	 
+	// New check if we need to randomise the test order
+	var randomise = xmlSetup[0].attributes['randomiseOrder'];
+	if (randomise != undefined) {
+		randomise = Boolean(randomise.value);
+	} else {
+		randomise = false;
+	}
+	if (randomise)
+	{
+ 		testXMLSetups = randomiseOrder(testXMLSetups);
+	}
+	 
+	// Obtain the metrics enabled
+	var metricNode = xmlSetup.find('Metric');
+	var metricNode = metricNode.find('metricEnable');
+	metricNode.each(function(index,node){
+		var enabled = node.textContent;
+		switch(enabled)
+		{
+		case 'testTimer':
+			sessionMetrics.prototype.enableTestTimer = true;
+			break;
+		case 'elementTimer':
+			sessionMetrics.prototype.enableElementTimer = true;
+			break;
+		case 'elementTracker':
+			sessionMetrics.prototype.enableElementTracker = true;
+			break;
+		case 'elementInitalPosition':
+			sessionMetrics.prototype.enableElementInitialPosition = true;
+			break;
+		case 'elementFlagListenedTo':
+			sessionMetrics.prototype.enableFlagListenedTo = true;
+			break;
+		case 'elementFlagMoved':
+			sessionMetrics.prototype.enableFlagMoved = true;
+			break;
+		case 'elementFlagComments':
+			sessionMetrics.prototype.enableFlagComments = true;
+			break;
+		}
+	});
+	
+	// Create APE specific metric functions
+	audioEngineContext.metric.initialiseTest = function()
+	{
+		var sliders = document.getElementsByClassName('track-slider');
+		for (var i=0; i<sliders.length; i++)
+		{
+			audioEngineContext.audioObjects[i].metric.initialised(convSliderPosToRate(i));
+		}
+	};
+	
+	audioEngineContext.metric.sliderMoveStart = function(id)
+	{
+		if (this.data == -1)
+		{
+			this.data = id;
+		} else {
+			console.log('ERROR: Metric tracker detecting two moves!');
+			this.data = -1;
+		}
+	};
+	audioEngineContext.metric.sliderMoved = function()
+	{
+		var time = audioEngineContext.timer.getTestTime();
+		var id = this.data;
+		this.data = -1;
+		var position = convSliderPosToRate(id);
+		if (audioEngineContext.timer.testStarted)
+		{
+			audioEngineContext.audioObjects[id].metric.moved(time,position);
+		}
+	};
+	
+	audioEngineContext.metric.sliderPlayed = function(id)
+	{
+		var time = audioEngineContext.timer.getTestTime();
+		if (audioEngineContext.timer.testStarted)
+		{
+			if (this.lastClicked >= 0)
+			{
+				audioEngineContext.audioObjects[this.lastClicked].metric.listening(time);
+			}
+			this.lastClicked = id;
+			audioEngineContext.audioObjects[id].metric.listening(time);
+		}
+	};
+	
+	// Create the top div for the Title element
+	var titleAttr = xmlSetup[0].attributes['title'];
+	var title = document.createElement('div');
+	title.className = "title";
+	title.align = "center";
+	var titleSpan = document.createElement('span');
+	
+	// Set title to that defined in XML, else set to default
+	if (titleAttr != undefined) {
+		titleSpan.innerHTML = titleAttr.value;
+	} else {
+		titleSpan.innerHTML =  'Listening test';
+	}
+	// Insert the titleSpan element into the title div element.
+	title.appendChild(titleSpan);
+	
+	var pagetitle = document.createElement('div');
+	pagetitle.className = "pageTitle";
+	pagetitle.align = "center";
+	var titleSpan = document.createElement('span');
+	titleSpan.id = "pageTitle";
+	pagetitle.appendChild(titleSpan);
+	
+	// Store the return URL path in global projectReturn
+	projectReturn = xmlSetup[0].attributes['projectReturn'].value;
+	
+	// Create Interface buttons!
+	var interfaceButtons = document.createElement('div');
+	interfaceButtons.id = 'interface-buttons';
+	
+	// MANUAL DOWNLOAD POINT
+	// If project return is null, this MUST be specified as the location to create the download link
+	var downloadPoint = document.createElement('div');
+	downloadPoint.id = 'download-point';
+	
+	// Create playback start/stop points
+	var playback = document.createElement("button");
+	playback.innerHTML = 'Stop';
+	playback.id = 'playback-button';
+	// onclick function. Check if it is playing or not, call the correct function in the
+	// audioEngine, change the button text to reflect the next state.
+	playback.onclick = function() {
+		if (audioEngineContext.status == 1) {
+			audioEngineContext.stop();
+			this.innerHTML = 'Stop';
+		}
+	};
+	// Create Submit (save) button
+	var submit = document.createElement("button");
+	submit.innerHTML = 'Submit';
+	submit.onclick = buttonSubmitClick;
+	submit.id = 'submit-button';
+	// Append the interface buttons into the interfaceButtons object.
+	interfaceButtons.appendChild(playback);
+	interfaceButtons.appendChild(submit);
+	interfaceButtons.appendChild(downloadPoint);
+	
+	// Now create the slider and HTML5 canvas boxes
+	
+	// Create the div box to center align
+	var sliderBox = document.createElement('div');
+	sliderBox.className = 'sliderCanvasDiv';
+	sliderBox.id = 'sliderCanvasHolder';
+	sliderBox.align = 'center';
+	
+	// Create the slider box to hold the slider elements
+	var canvas = document.createElement('div');
+	canvas.id = 'slider';
+	// Must have a known EXACT width, as this is used later to determine the ratings
+	canvas.style.width = width - 100 +"px";
+	canvas.align = "left";
+	sliderBox.appendChild(canvas);
+	
+	// Create the div to hold any scale objects
+	var scale = document.createElement('div');
+	scale.className = 'sliderScale';
+	scale.id = 'sliderScaleHolder';
+	scale.align = 'left';
+	sliderBox.appendChild(scale);
+	
+	// Global parent for the comment boxes on the page
+	var feedbackHolder = document.createElement('div');
+	feedbackHolder.id = 'feedbackHolder';
+	
+	testContent.style.zIndex = 1;
+	insertPoint.innerHTML = null; // Clear the current schema
+	
+	// Create pre and post test questions
+	var blank = document.createElement('div');
+	blank.className = 'testHalt';
+	
+	var popupHolder = document.createElement('div');
+	popupHolder.id = 'popupHolder';
+	popupHolder.className = 'popupHolder';
+	popupHolder.style.position = 'absolute';
+	popupHolder.style.left = (window.innerWidth/2)-250 + 'px';
+	popupHolder.style.top = (window.innerHeight/2)-125 + 'px';
+	insertPoint.appendChild(popupHolder);
+	insertPoint.appendChild(blank);
+	hidePopup();
+	
+	var preTest = xmlSetup.find('PreTest');
+	var postTest = xmlSetup.find('PostTest');
+	preTest = preTest[0];
+	postTest = postTest[0];
+	
+	currentState = 'preTest';
+	
+	// Create Pre-Test Box
+	if (preTest != undefined && preTest.children.length >= 1)
+	{
+		showPopup();
+		preTestPopupStart(preTest);
+	}
+	
+	// Inject into HTML
+	testContent.appendChild(title); // Insert the title
+	testContent.appendChild(pagetitle);
+	testContent.appendChild(interfaceButtons);
+	testContent.appendChild(sliderBox);
+	testContent.appendChild(feedbackHolder);
+	insertPoint.appendChild(testContent);
+
+	// Load the full interface
+	
+}
+
+function loadTest(id)
+{
+	// Used to load a specific test page
+	var textXML = testXMLSetups[id];
+	
+	var feedbackHolder = document.getElementById('feedbackHolder');
+	var canvas = document.getElementById('slider');
+	feedbackHolder.innerHTML = null;
+	canvas.innerHTML = null;
+	
+	// Setup question title
+	var interfaceObj = $(textXML).find('interface');
+	var titleNode = interfaceObj.find('title');
+	if (titleNode[0] != undefined)
+	{
+		document.getElementById('pageTitle').textContent = titleNode[0].textContent;
+	}
+	var positionScale = canvas.style.width.substr(0,canvas.style.width.length-2);
+	var offset = 50-8;  // Half the offset of the slider (window width -100) minus the body padding of 8
+	// TODO: AUTOMATE ABOVE!!
+	var scale = document.getElementById('sliderScaleHolder');
+	scale.innerHTML = null;
+	interfaceObj.find('scale').each(function(index,scaleObj){
+		var position = Number(scaleObj.attributes['position'].value)*0.01;
+		var pixelPosition = (position*positionScale)+offset;
+		var scaleDOM = document.createElement('span');
+		scaleDOM.textContent = scaleObj.textContent;
+		scale.appendChild(scaleDOM);
+		scaleDOM.style.left = Math.floor((pixelPosition-($(scaleDOM).width()/2)))+'px';
+	});
+
+	// Extract the hostURL attribute. If not set, create an empty string.
+	var hostURL = textXML.attributes['hostURL'];
+	if (hostURL == undefined) {
+		hostURL = "";
+	} else {
+		hostURL = hostURL.value;
+	}
+	// Extract the sampleRate. If set, convert the string to a Number.
+	var hostFs = textXML.attributes['sampleRate'];
+	if (hostFs != undefined) {
+		hostFs = Number(hostFs.value);
+	}
+	
+	/// CHECK FOR SAMPLE RATE COMPATIBILITY
+	if (hostFs != undefined) {
+		if (Number(hostFs) != audioContext.sampleRate) {
+			var errStr = 'Sample rates do not match! Requested '+Number(hostFs)+', got '+audioContext.sampleRate+'. Please set the sample rate to match before completing this test.';
+			alert(errStr);
+			return;
+		}
+	}
+	
+	var commentShow = textXML.attributes['elementComments'];
+	if (commentShow != undefined) {
+		if (commentShow.value == 'false') {commentShow = false;}
+		else {commentShow = true;}
+	} else {commentShow = true;}
+	
+	var loopPlayback = textXML.attributes['loop'];
+	if (loopPlayback != undefined)
+	{
+		loopPlayback = loopPlayback.value;
+		if (loopPlayback == 'true') {
+			loopPlayback = true;
+		} else {
+			loopPlayback = false;
+		}
+	} else {
+		loopPlayback = false;
+	}
+	audioEngineContext.loopPlayback = loopPlayback;
+	
+	// Create AudioEngine bindings for playback
+	if (loopPlayback) {
+		audioEngineContext.play = function() {
+			// Send play command to all playback buffers for synchronised start
+			// Also start timer callbacks to detect if playback has finished
+			if (this.status == 0) {
+				this.timer.startTest();
+				// First get current clock
+				var timer = audioContext.currentTime;
+				// Add 3 seconds
+				timer += 3.0;
+				// Send play to all tracks
+				for (var i=0; i<this.audioObjects.length; i++)
+				{
+					this.audioObjects[i].play(timer);
+				}
+				this.status = 1;
+			}
+		};
+		
+		audioEngineContext.stop = function() {
+			// Send stop and reset command to all playback buffers
+			if (this.status == 1) {
+				if (this.loopPlayback) {
+					for (var i=0; i<this.audioObjects.length; i++)
+					{
+						this.audioObjects[i].stop();
+					}
+				}
+				this.status = 0;
+			}
+		};
+		
+		audioEngineContext.selectedTrack = function(id) {
+			for (var i=0; i<this.audioObjects.length; i++)
+			{
+				if (id == i) {
+					this.audioObjects[i].outputGain.gain.value = 1.0;
+				} else {
+					this.audioObjects[i].outputGain.gain.value = 0.0;
+				}
+			}
+		};
+	} else {
+		audioEngineContext.play = function() {
+			// Send play command to all playback buffers for synchronised start
+			// Also start timer callbacks to detect if playback has finished
+			if (this.status == 0) {
+				this.timer.startTest();
+				this.status = 1;
+			}
+		};
+		
+		audioEngineContext.stop = function() {
+			// Send stop and reset command to all playback buffers
+			if (this.status == 1) {
+				for (var i=0; i<this.audioObjects.length; i++)
+				{
+					this.audioObjects[i].stop();
+				}
+				this.status = 0;
+			}
+		};
+		
+		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);
+			}
+		};
+	}
+	
+	currentTestHolder = document.createElement('audioHolder');
+	currentTestHolder.id = textXML.id;
+	currentTestHolder.repeatCount = textXML.attributes['repeatCount'].value;
+	var currentPreTestHolder = document.createElement('preTest');
+	var currentPostTestHolder = document.createElement('postTest');
+	currentTestHolder.appendChild(currentPreTestHolder);
+	currentTestHolder.appendChild(currentPostTestHolder);
+	
+	var randomise = textXML.attributes['randomiseOrder'];
+	if (randomise != undefined) {randomise = randomise.value;}
+	else {randomise = false;}
+	
+	var audioElements = $(textXML).find('audioElements');
+	currentTrackOrder = [];
+	audioElements.each(function(index,element){
+		// Find any blind-repeats
+		// Not implemented yet, but just in case
+		currentTrackOrder[index] = element;
+	});
+	if (randomise) {
+		currentTrackOrder = randomiseOrder(currentTrackOrder);
+	}
+	
+	// Delete any previous audioObjects associated with the audioEngine
+	audioEngineContext.audioObjects = [];
+	
+	// Find all the audioElements from the audioHolder
+	$(currentTrackOrder).each(function(index,element){
+		// Find URL of track
+		// In this jQuery loop, variable 'this' holds the current audioElement.
+		
+		// Now load each audio sample. First create the new track by passing the full URL
+		var trackURL = hostURL + this.attributes['url'].value;
+		audioEngineContext.newTrack(trackURL);
+		
+		if (commentShow) {
+			// Create document objects to hold the comment boxes
+			var trackComment = document.createElement('div');
+			trackComment.className = 'comment-div';
+			// Create a string next to each comment asking for a comment
+			var trackString = document.createElement('span');
+			trackString.innerHTML = 'Comment on track '+index;
+			// Create the HTML5 comment box 'textarea'
+			var trackCommentBox = document.createElement('textarea');
+			trackCommentBox.rows = '4';
+			trackCommentBox.cols = '100';
+			trackCommentBox.name = 'trackComment'+index;
+			trackCommentBox.className = 'trackComment';
+			var br = document.createElement('br');
+			// Add to the holder.
+			trackComment.appendChild(trackString);
+			trackComment.appendChild(br);
+			trackComment.appendChild(trackCommentBox);
+			feedbackHolder.appendChild(trackComment);
+		}
+		
+		// Create a slider per track
+		
+		var trackSliderObj = document.createElement('div');
+		trackSliderObj.className = 'track-slider';
+		trackSliderObj.id = 'track-slider-'+index;
+		// Distribute it randomnly
+		var w = window.innerWidth - 100;
+		w = Math.random()*w;
+		trackSliderObj.style.left = Math.floor(w)+50+'px';
+		trackSliderObj.innerHTML = '<span>'+index+'</span>';
+		trackSliderObj.draggable = true;
+		trackSliderObj.ondragend = dragEnd;
+		trackSliderObj.ondragstart = function()
+		{
+			var id = Number(this.id.substr(13,2)); // Maximum theoretical tracks is 99!
+			audioEngineContext.metric.sliderMoveStart(id);
+		};
+		
+		// Onclick, switch playback to that track
+		trackSliderObj.onclick = function() {
+			// Get the track ID from the object ID
+			var id = Number(this.id.substr(13,2)); // Maximum theoretical tracks is 99!
+			audioEngineContext.metric.sliderPlayed(id);
+			audioEngineContext.selectedTrack(id);
+            // Currently playing track red, rest green
+            document.getElementById('track-slider-'+index).style.backgroundColor = "#FF0000";
+            for (var i = 0; i<$(currentTrackOrder).length; i++)
+            {
+                if (i!=index) // Make all other sliders green
+                {
+                    document.getElementById('track-slider-'+i).style.backgroundColor = "rgb(100,200,100)";
+                }
+                              
+            }
+            audioEngineContext.play();
+            hasBeenPlayed[index] = true; // mark as played
+		};
+		
+		canvas.appendChild(trackSliderObj);
+        
+        // Add corresponding element to array to check whether sound has been played
+        hasBeenPlayed.push(false);
+	});
+	
+	// Append any commentQuestion boxes
+	var commentQuestions = $(textXML).find('CommentQuestion');
+	$(commentQuestions).each(function(index,element) {
+		// Create document objects to hold the comment boxes
+		var trackComment = document.createElement('div');
+		trackComment.className = 'comment-div commentQuestion';
+		trackComment.id = element.attributes['id'].value;
+		// Create a string next to each comment asking for a comment
+		var trackString = document.createElement('span');
+		trackString.innerHTML = element.textContent;
+		// Create the HTML5 comment box 'textarea'
+		var trackCommentBox = document.createElement('textarea');
+		trackCommentBox.rows = '4';
+		trackCommentBox.cols = '100';
+		trackCommentBox.name = 'commentQuestion'+index;
+		trackCommentBox.className = 'trackComment';
+		var br = document.createElement('br');
+		// Add to the holder.
+		trackComment.appendChild(trackString);
+		trackComment.appendChild(br);
+		trackComment.appendChild(trackCommentBox);
+		feedbackHolder.appendChild(trackComment);
+	});
+	
+	// Now process any pre-test commands
+	
+	var preTest = $(testXMLSetups[id]).find('PreTest')[0];
+	if (preTest.children.length > 0)
+	{
+		currentState = 'testRunPre-'+id;
+		preTestPopupStart(preTest);
+		showPopup();
+	} else {
+		currentState = 'testRun-'+id;
+	}
+}
+
+function preTestPopupStart(preTest)
+{
+	var popupHolder = document.getElementById('popupHolder');
+	popupHolder.innerHTML = null;
+	// Parse the first box
+	var preTestOption = document.createElement('div');
+	preTestOption.id = 'preTest';
+	preTestOption.style.marginTop = '25px';
+	preTestOption.align = "center";
+	var child = preTest.children[0];
+	if (child.nodeName == 'statement')
+	{
+		preTestOption.innerHTML = '<span>'+child.innerHTML+'</span>';
+	} else if (child.nodeName == 'question')
+	{
+		var questionId = child.attributes['id'].value;
+		var textHold = document.createElement('span');
+		textHold.innerHTML = child.innerHTML;
+		textHold.id = questionId + 'response';
+		var textEnter = document.createElement('textarea');
+		preTestOption.appendChild(textHold);
+		preTestOption.appendChild(textEnter);
+	}
+	var nextButton = document.createElement('button');
+	nextButton.className = 'popupButton';
+	nextButton.value = '0';
+	nextButton.innerHTML = 'Next';
+	nextButton.onclick = popupButtonClick;
+	
+	popupHolder.appendChild(preTestOption);
+	popupHolder.appendChild(nextButton);
+}
+
+function popupButtonClick()
+{
+	// Global call from the 'Next' button click
+	if (currentState == 'preTest')
+	{
+		// At the start of the preTest routine!
+		var xmlTree = projectXML.find('setup');
+		var preTest = xmlTree.find('PreTest')[0];
+		this.value = preTestButtonClick(preTest,this.value);
+	} else if (currentState.substr(0,10) == 'testRunPre')
+	{
+		//Specific test pre-test
+		var testId = currentState.substr(11,currentState.length-10);
+		var preTest = $(testXMLSetups[testId]).find('PreTest')[0];
+		this.value = preTestButtonClick(preTest,this.value);
+	} else if (currentState.substr(0,11) == 'testRunPost')
+	{
+		// Specific test post-test
+		var testId = currentState.substr(12,currentState.length-11);
+		var preTest = $(testXMLSetups[testId]).find('PostTest')[0];
+		this.value = preTestButtonClick(preTest,this.value);
+	} else if (currentState == 'postTest')
+	{
+		// At the end of the test, running global post test
+		var xmlTree = projectXML.find('setup');
+		var PostTest = xmlTree.find('PostTest')[0];
+		this.value = preTestButtonClick(PostTest,this.value);
+	}
+}
+
+function preTestButtonClick(preTest,index)
+{
+	// Called on click of pre-test button
+	// Need to find and parse preTest again!
+	var preTestOption = document.getElementById('preTest');
+	// Check if current state is a question!
+	if (preTest.children[index].nodeName == 'question') {
+		var questionId = preTest.children[index].attributes['id'].value;
+		var questionHold = document.createElement('comment');
+		var questionResponse = document.getElementById(questionId + 'response');
+		var mandatory = preTest.children[index].attributes['mandatory'];
+		if (mandatory != undefined){
+			if (mandatory.value == 'true') {mandatory = true;}
+			else {mandatory = false;}
+		} else {mandatory = false;}
+		if (mandatory == true && questionResponse.value.length == 0) {
+			return index;
+		}
+		questionHold.id = questionId;
+		questionHold.innerHTML = questionResponse.value;
+		postPopupResponse(questionHold);
+	}
+	index++;
+	if (index < preTest.children.length)
+	{
+		// More to process
+		var child = preTest.children[index];
+		if (child.nodeName == 'statement')
+		{
+			preTestOption.innerHTML = '<span>'+child.innerHTML+'</span>';
+		} else if (child.nodeName == 'question')
+		{
+			var textHold = document.createElement('span');
+			textHold.innerHTML = child.innerHTML;
+			var textEnter = document.createElement('textarea');
+			textEnter.id = child.attributes['id'].value + 'response';
+			var br = document.createElement('br');
+			preTestOption.innerHTML = null;
+			preTestOption.appendChild(textHold);
+			preTestOption.appendChild(br);
+			preTestOption.appendChild(textEnter);
+		}
+	} else {
+		// Time to clear
+		preTestOption.innerHTML = null;
+		if (currentState != 'postTest') {
+			hidePopup();
+			// Progress the state!
+			advanceState();
+		} else {
+			a = createProjectSave(projectReturn);
+			preTestOption.appendChild(a);
+		}
+	}
+	return index;
+}
+
+function postPopupResponse(response)
+{
+	if (currentState == 'preTest') {
+		preTestQuestions.appendChild(response);
+	} else if (currentState == 'postTest') {  
+		postTestQuestions.appendChild(response);
+	} else {
+		// Inside a specific test
+		if (currentState.substr(0,10) == 'testRunPre') {
+			// Pre Test
+			var store = $(currentTestHolder).find('preTest');
+		} else {
+			// Post Test
+			var store = $(currentTestHolder).find('postTest');
+		}
+		store[0].appendChild(response);
+	}
+}
+
+function showPopup()
+{
+	var popupHolder = document.getElementById('popupHolder');
+	popupHolder.style.zIndex = 3;
+	popupHolder.style.visibility = 'visible';
+	var blank = document.getElementsByClassName('testHalt')[0];
+	blank.style.zIndex = 2;
+	blank.style.visibility = 'visible';
+}
+
+function hidePopup()
+{
+	var popupHolder = document.getElementById('popupHolder');
+	popupHolder.style.zIndex = -1;
+	popupHolder.style.visibility = 'hidden';
+	var blank = document.getElementsByClassName('testHalt')[0];
+	blank.style.zIndex = -2;
+	blank.style.visibility = 'hidden';
+}
+
+function dragEnd(ev) {
+	// Function call when a div has been dropped
+	var slider = document.getElementById('slider');
+	var w = slider.style.width;
+	w = Number(w.substr(0,w.length-2));
+	var x = ev.x;
+	if (x >= 42 && x < w+42) {
+		this.style.left = (x)+'px';
+	} else {
+		if (x<42) {
+			this.style.left = '42px';
+		} else {
+			this.style.left = (w+42) + 'px';
+		}
+	}
+	audioEngineContext.metric.sliderMoved();
+}
+
+function advanceState()
+{
+	console.log(currentState);
+	if (currentState == 'preTest')
+	{
+		// End of pre-test, begin the test
+		loadTest(0);
+	} else if (currentState.substr(0,10) == 'testRunPre')
+	{
+		// Start the test
+		var testId = currentState.substr(11,currentState.length-10);
+		currentState = 'testRun-'+testId;
+	} else if (currentState.substr(0,11) == 'testRunPost')
+	{
+		var testId = currentState.substr(12,currentState.length-11);
+		testEnded(testId);
+	} else if (currentState.substr(0,7) == 'testRun')
+	{
+		var testId = currentState.substr(8,currentState.length-7);
+		// Check if we have any post tests to perform
+		var postXML = $(testXMLSetups[testId]).find('PostTest')[0];
+		if (postXML == undefined) {
+			testEnded(testId);
+		}
+		else if (postXML.children.length > 0)
+		{
+			currentState = 'testRunPost-'+testId; 
+			showPopup();
+			preTestPopupStart(postXML);
+		}
+		else {
+		
+		
+			// No post tests, check if we have another test to perform instead
+			
+		}
+	}
+	console.log(currentState);
+}
+
+function testEnded(testId)
+{
+	pageXMLSave(testId);
+	if (testXMLSetups.length-1 > testId)
+	{
+		// Yes we have another test to perform
+		testId = (Number(testId)+1);
+		currentState = 'testRun-'+testId;
+		loadTest(testId);
+	} else {
+		console.log('Testing Completed!');
+		currentState = 'postTest';
+		// Check for any post tests
+		var xmlSetup = projectXML.find('setup');
+		var postTest = xmlSetup.find('PostTest')[0];
+		showPopup();
+		preTestPopupStart(postTest);
+	}
+}
+
+function buttonSubmitClick() // TODO: Only when all songs have been played!
+{
+    if (hasBeenPlayed.indexOf(false)==-1)
+        {
+        if (audioEngineContext.status == 1) {
+            var playback = document.getElementById('playback-button');
+            playback.click();
+        // This function is called when the submit button is clicked. Will check for any further tests to perform, or any post-test options
+        } else
+        {
+            if (audioEngineContext.timer.testStarted == false)
+            {
+                alert('You have not started the test! Please press start to begin the test!');
+                return;
+            }
+        }
+        if (currentState.substr(0,7) == 'testRun')
+        {
+            hasBeenPlayed = []; // clear array to prepare for next test
+            audioEngineContext.timer.stopTest();
+            advanceState();
+        }
+    } else // if a fragment has not been played yet
+    {
+        alert('You have not played fragment ' + hasBeenPlayed.indexOf(false) + ' yet. Please listen, rate and comment all samples before submitting.');
+        return;
+    }
+}
+
+function convSliderPosToRate(id)
+{
+	var w = document.getElementById('slider').style.width;
+	var maxPix = w.substr(0,w.length-2);
+	var slider = document.getElementsByClassName('track-slider')[id];
+	var pix = slider.style.left;
+	pix = pix.substr(0,pix.length-2);
+	var rate = (pix-42)/maxPix;
+	return rate;
+}
+
+function pageXMLSave(testId)
+{
+	// Saves a specific test page
+	var xmlDoc = currentTestHolder;
+	// Check if any session wide metrics are enabled
+	
+	var commentShow = testXMLSetups[testId].attributes['elementComments'];
+	if (commentShow != undefined) {
+		if (commentShow.value == 'false') {commentShow = false;}
+		else {commentShow = true;}
+	} else {commentShow = true;}
+	
+	var metric = document.createElement('metric');
+	if (audioEngineContext.metric.enableTestTimer)
+	{
+		var testTime = document.createElement('metricResult');
+		testTime.id = 'testTime';
+		testTime.textContent = audioEngineContext.timer.testDuration;
+		metric.appendChild(testTime);
+	}
+	xmlDoc.appendChild(metric);
+	var trackSliderObjects = document.getElementsByClassName('track-slider');
+	var commentObjects = document.getElementsByClassName('comment-div');
+	for (var i=0; i<trackSliderObjects.length; i++) 
+	{
+		var audioElement = document.createElement('audioElement');
+		audioElement.id = currentTrackOrder[i].attributes['id'].value;
+		audioElement.url = currentTrackOrder[i].attributes['url'].value;
+		var value = document.createElement('value');
+		value.innerHTML = convSliderPosToRate(i);
+		if (commentShow) {
+			var comment = document.createElement("comment");
+			var question = document.createElement("question");
+			var response = document.createElement("response");
+			question.textContent = commentObjects[i].children[0].textContent;
+			response.textContent = commentObjects[i].children[2].value;
+			comment.appendChild(question);
+			comment.appendChild(response);
+			audioElement.appendChild(comment);
+		}
+		audioElement.appendChild(value);
+		// Check for any per element metrics
+		var metric = document.createElement('metric');
+		var elementMetric = audioEngineContext.audioObjects[i].metric;
+		if (audioEngineContext.metric.enableElementTimer) {
+			var elementTimer = document.createElement('metricResult');
+			elementTimer.id = 'elementTimer';
+			elementTimer.textContent = elementMetric.listenedTimer;
+			metric.appendChild(elementTimer);
+		}
+		if (audioEngineContext.metric.enableElementTracker) {
+			var elementTrackerFull = document.createElement('metricResult');
+			elementTrackerFull.id = 'elementTrackerFull';
+			var data = elementMetric.movementTracker;
+			for (var k=0; k<data.length; k++)
+			{
+				var timePos = document.createElement('timePos');
+				timePos.id = k;
+				var time = document.createElement('time');
+				time.textContent = data[k][0];
+				var position = document.createElement('position');
+				position.textContent = data[k][1];
+				timePos.appendChild(time);
+				timePos.appendChild(position);
+				elementTrackerFull.appendChild(timePos);
+			}
+			metric.appendChild(elementTrackerFull);
+		}
+		if (audioEngineContext.metric.enableElementInitialPosition) {
+			var elementInitial = document.createElement('metricResult');
+			elementInitial.id = 'elementInitialPosition';
+			elementInitial.textContent = elementMetric.initialPosition;
+			metric.appendChild(elementInitial);
+		}
+		if (audioEngineContext.metric.enableFlagListenedTo) {
+			var flagListenedTo = document.createElement('metricResult');
+			flagListenedTo.id = 'elementFlagListenedTo';
+			flagListenedTo.textContent = elementMetric.wasListenedTo;
+			metric.appendChild(flagListenedTo);
+		}
+		if (audioEngineContext.metric.enableFlagMoved) {
+			var flagMoved = document.createElement('metricResult');
+			flagMoved.id = 'elementFlagMoved';
+			flagMoved.textContent = elementMetric.wasMoved;
+			metric.appendChild(flagMoved);
+		}
+		if (audioEngineContext.metric.enableFlagComments) {
+			var flagComments = document.createElement('metricResult');
+			flagComments.id = 'elementFlagComments';
+			if (response.textContent.length == 0) {flag.textContent = 'false';}
+			else {flag.textContet = 'true';}
+			metric.appendChild(flagComments);
+		}
+		audioElement.appendChild(metric);
+		xmlDoc.appendChild(audioElement);
+	}
+	var commentQuestion = document.getElementsByClassName('commentQuestion');
+	for (var i=0; i<commentQuestion.length; i++)
+	{
+		var cqHolder = document.createElement('CommentQuestion');
+		var comment = document.createElement('comment');
+		var question = document.createElement('question');
+		cqHolder.id = commentQuestion[i].id;
+		comment.textContent = commentQuestion[i].children[2].value;
+		question.textContent = commentQuestion[i].children[0].textContent;
+		cqHolder.appendChild(question);
+		cqHolder.appendChild(comment);
+		xmlDoc.appendChild(cqHolder);
+	}
+	testResultsHolders[testId] = xmlDoc;
+}
+
+// Only other global function which must be defined in the interface class. Determines how to create the XML document.
+function interfaceXMLSave(){
+	// Create the XML string to be exported with results
+	var xmlDoc = document.createElement("BrowserEvaluationResult");
+	for (var i=0; i<testResultsHolders.length; i++)
+	{
+		xmlDoc.appendChild(testResultsHolders[i]);
+	}
+	// Append Pre/Post Questions
+	xmlDoc.appendChild(preTestQuestions);
+	xmlDoc.appendChild(postTestQuestions);
+	
+	return xmlDoc;
+}