diff ape.js @ 1556:c6decd1db0da

Added common interface to specification to handle global interface-specific functions such as checks for playback.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ape.js	Tue Jun 16 15:44:02 2015 +0100
@@ -0,0 +1,464 @@
+/**
+ *  ape.js
+ *  Create the APE interface
+ */
+
+// 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!
+
+
+// Once this is loaded and parsed, begin execution
+loadInterface();
+
+function loadInterface() {
+	
+	// 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
+	interfaceContext.insertPoint = document.getElementById("topLevelBody");
+	var testContent = document.createElement('div');
+	
+	testContent.id = 'testContent';
+
+	
+	// Create APE specific metric functions
+	audioEngineContext.metric.initialiseTest = function()
+	{
+	};
+	
+	audioEngineContext.metric.sliderMoved = function()
+	{
+		
+		var id = this.data;
+		this.data = -1;
+		var position = convSliderPosToRate(id);
+        console.log('slider ' + id + ': '+ position + ' (' + time + ')'); // DEBUG/SAFETY: show position and slider 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);
+		}
+        console.log('slider ' + id + ' played (' + time + ')'); // DEBUG/SAFETY: show played slider id
+	};
+	
+	// Bindings for audioObjects
+	
+	// Create the top div for the Title element
+	var titleAttr = specification.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.textContent = titleAttr;
+	} else {
+		titleSpan.textContent =  '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);
+	
+	// Create Interface buttons!
+	var interfaceButtons = document.createElement('div');
+	interfaceButtons.id = 'interface-buttons';
+	
+	// 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';
+            var time = audioEngineContext.timer.getTestTime();
+            console.log('Stopped at ' + time); // DEBUG/SAFETY
+		}
+	};
+	// 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);
+	
+	// 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';
+	
+	// Create the slider box to hold the slider elements
+	var canvas = document.createElement('div');
+	canvas.id = 'slider';
+	canvas.align = "left";
+	canvas.addEventListener('dragover',function(event){
+		event.preventDefault();
+		return false;
+	},false);
+	var sliderMargin = document.createAttribute('marginsize');
+	sliderMargin.nodeValue = 42; // Set default margins to 42px either side
+	// Must have a known EXACT width, as this is used later to determine the ratings
+	var w = (Number(sliderMargin.nodeValue)+8)*2;
+	canvas.style.width = width - w +"px";
+	canvas.style.marginLeft = sliderMargin.nodeValue +'px';
+	canvas.setAttributeNode(sliderMargin);
+	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;
+	interfaceContext.insertPoint.innerHTML = null; // Clear the current schema
+	
+	// Inject into HTML
+	testContent.appendChild(title); // Insert the title
+	testContent.appendChild(pagetitle);
+	testContent.appendChild(interfaceButtons);
+	testContent.appendChild(sliderBox);
+	testContent.appendChild(feedbackHolder);
+	interfaceContext.insertPoint.appendChild(testContent);
+
+	// Load the full interface
+	testState.initialise();
+	testState.advanceState();
+	
+}
+
+function loadTest(audioHolderObject)
+{
+	
+	// Reset audioEngineContext.Metric globals for new test
+	audioEngineContext.newTestPage();
+	
+	var id = audioHolderObject.id;
+	
+	var feedbackHolder = document.getElementById('feedbackHolder');
+	var canvas = document.getElementById('slider');
+	feedbackHolder.innerHTML = null;
+	canvas.innerHTML = null;
+	
+	var playbackHolder = document.createElement('div');
+	playbackHolder.style.width = "100%";
+	playbackHolder.align = 'center';
+	playbackHolder.appendChild(interfaceContext.playhead.object);
+	feedbackHolder.appendChild(playbackHolder);
+	// Setup question title
+	var interfaceObj = audioHolderObject.interfaces;
+	var commentBoxPrefix = "Comment on track";
+	if (interfaceObj.length != 0) {
+		interfaceObj = interfaceObj[0];
+		var titleNode = interfaceObj.title;
+		if (titleNode != undefined)
+		{
+			document.getElementById('pageTitle').textContent = titleNode;
+		}
+		var positionScale = canvas.style.width.substr(0,canvas.style.width.length-2);
+		var offset = Number(document.getElementById('slider').attributes['marginsize'].value);
+		var scale = document.getElementById('sliderScaleHolder');
+		scale.innerHTML = null;
+		$(interfaceObj.scale).each(function(index,scaleObj){
+			var value = document.createAttribute('value');
+			var position = Number(scaleObj[0])*0.01;
+			value.nodeValue = position;
+			var pixelPosition = (position*positionScale)+offset;
+			var scaleDOM = document.createElement('span');
+			scaleDOM.textContent = scaleObj[1];
+			scale.appendChild(scaleDOM);
+			scaleDOM.style.left = Math.floor((pixelPosition-($(scaleDOM).width()/2)))+'px';
+			scaleDOM.setAttributeNode(value);
+		});
+		
+		if (interfaceObj.commentBoxPrefix != undefined) {
+			commentBoxPrefix = interfaceObj.commentBoxPrefix;
+		}
+	}
+
+	/// CHECK FOR SAMPLE RATE COMPATIBILITY
+	if (audioHolderObject.sampleRate != undefined) {
+		if (Number(audioHolderObject.sampleRate) != audioContext.sampleRate) {
+			var errStr = 'Sample rates do not match! Requested '+Number(audioHolderObject.sampleRate)+', got '+audioContext.sampleRate+'. Please set the sample rate to match before completing this test.';
+			alert(errStr);
+			return;
+		}
+	}
+	
+	var commentShow = audioHolderObject.elementComments;
+	
+	var loopPlayback = audioHolderObject.loop;
+
+	audioEngineContext.loopPlayback = loopPlayback;
+	// Create AudioEngine bindings for playback
+	audioEngineContext.selectedTrack = function(id) {
+		console.log('Deprecated');
+	};
+	
+	currentTestHolder = document.createElement('audioHolder');
+	currentTestHolder.id = audioHolderObject.id;
+	currentTestHolder.repeatCount = audioHolderObject.repeatCount;
+	
+	var randomise = audioHolderObject.randomiseOrder;
+	
+	var audioElements = audioHolderObject.audioElements;
+	currentTrackOrder = [];
+	if (randomise) {
+		audioHolderObject.audioElements = randomiseOrder(audioHolderObject.audioElements);
+	}
+	
+	// Delete any previous audioObjects associated with the audioEngine
+	audioEngineContext.audioObjects = [];
+	interfaceContext.deleteCommentBoxes();
+	
+	// Find all the audioElements from the audioHolder
+	$(audioHolderObject.audioElements).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 = audioHolderObject.hostURL + element.url;
+		var audioObject = audioEngineContext.newTrack(element);
+		
+		var node = interfaceContext.createCommentBox(audioObject);
+		
+		// Create a slider per track
+		audioObject.interfaceDOM = new sliderObject(audioObject);
+		
+		// Distribute it randomnly
+		var w = window.innerWidth - (offset+8)*2;
+		w = Math.random()*w;
+		w = Math.floor(w+(offset+8));
+		audioObject.interfaceDOM.trackSliderObj.style.left = w+'px';
+		
+		canvas.appendChild(audioObject.interfaceDOM.trackSliderObj);
+		audioObject.metric.initialised(convSliderPosToRate(audioObject.interfaceDOM.trackSliderObj));
+        
+	});
+	if (commentShow) {
+		interfaceContext.showCommentBoxes(feedbackHolder,true);
+	}
+	
+	$(audioHolderObject.commentQuestions).each(function(index,element) {
+		var node = interfaceContext.createCommentQuestion(element);
+		feedbackHolder.appendChild(node.holder);
+	});
+	
+	
+	testWaitIndicator();
+}
+
+function sliderObject(audioObject) {
+	// Create a new slider object;
+	this.parent = audioObject;
+	this.trackSliderObj = document.createElement('div');
+	this.trackSliderObj.className = 'track-slider';
+	this.trackSliderObj.id = 'track-slider-'+audioObject.id;
+
+	this.trackSliderObj.setAttribute('trackIndex',audioObject.id);
+	this.trackSliderObj.innerHTML = '<span>'+audioObject.id+'</span>';
+	this.trackSliderObj.draggable = true;
+	this.trackSliderObj.ondragend = dragEnd;
+
+	// Onclick, switch playback to that track
+	this.trackSliderObj.onclick = function() {
+		// Start the test on first click, that way timings are more accurate.
+		audioEngineContext.play();
+		if (audioEngineContext.audioObjectsReady) {
+			// Cannot continue to issue play command until audioObjects reported as ready!
+			// Get the track ID from the object ID
+			var element;
+			if (event.srcElement.nodeName == "SPAN") {
+				element = event.srcElement.parentNode;
+			} else {
+				element = event.srcElement;
+			}
+			var id = Number(element.attributes['trackIndex'].value);
+			//audioEngineContext.metric.sliderPlayed(id);
+			audioEngineContext.play(id);
+            // Currently playing track red, rest green
+            
+            //document.getElementById('track-slider-'+index).style.backgroundColor = "#FF0000";
+            $('.track-slider').removeClass('track-slider-playing');
+            $(element).addClass('track-slider-playing');
+            $('.comment-div').removeClass('comment-box-playing');
+            $('#comment-div-'+id).addClass('comment-box-playing');
+		}
+	};
+	
+	this.exportXMLDOM = function() {
+		// Called by the audioObject holding this element. Must be present
+		var node = document.createElement('value');
+		node.textContent = convSliderPosToRate(this.trackSliderObj);
+		return node;
+	};
+}
+
+function dragEnd(ev) {
+	// Function call when a div has been dropped
+	var slider = document.getElementById('slider');
+	var marginSize = Number(slider.attributes['marginsize'].value);
+	var w = slider.style.width;
+	w = Number(w.substr(0,w.length-2));
+	var x = ev.x;
+	if (x >= marginSize && x < w+marginSize) {
+		this.style.left = (x)+'px';
+	} else {
+		if (x<marginSize) {
+			this.style.left = marginSize+'px';
+		} else {
+			this.style.left = (w+marginSize) + 'px';
+		}
+	}
+	var time = audioEngineContext.timer.getTestTime();
+	var id = Number(ev.srcElement.getAttribute('trackindex'));
+	audioEngineContext.audioObjects[id].metric.moved(time,convSliderPosToRate(ev.srcElement));
+}
+
+function buttonSubmitClick() // TODO: Only when all songs have been played!
+{
+    hasBeenPlayed = audioEngineContext.checkAllPlayed();
+    if (hasBeenPlayed.length == 0) {
+	    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;
+	        }
+	    }
+	    testState.advanceState();
+    } else // if a fragment has not been played yet
+    {
+    	str = "";
+    	if (hasBeenPlayed.length > 1) {
+	    	for (var i=0; i<hasBeenPlayed.length; i++) {
+	    		str = str + hasBeenPlayed[i];
+	    		if (i < hasBeenPlayed.length-2){
+	    			str += ", ";
+	    		} else if (i == hasBeenPlayed.length-2) {
+	    			str += " or ";
+	    		}
+	    	}
+	    	alert('You have not played fragments ' + str + ' yet. Please listen, rate and comment all samples before submitting.');
+       } else {
+       		alert('You have not played fragment ' + hasBeenPlayed[0] + ' yet. Please listen, rate and comment all samples before submitting.');
+       }
+        return;
+    }
+}
+
+function convSliderPosToRate(slider)
+{
+	var w = document.getElementById('slider').style.width;
+	var marginsize = Number(document.getElementById('slider').attributes['marginsize'].value);
+	var maxPix = w.substr(0,w.length-2);
+	var pix = slider.style.left;
+	pix = pix.substr(0,pix.length-2);
+	var rate = (pix-marginsize)/maxPix;
+	return rate;
+}
+
+function resizeWindow(event){
+	// Function called when the window has been resized.
+	// MANDATORY FUNCTION
+	
+	// Store the slider marker values
+	var holdValues = [];
+	$(".track-slider").each(function(index,sliderObj){
+		holdValues.push(convSliderPosToRate(index));
+	});
+	
+	var width = event.target.innerWidth;
+	var canvas = document.getElementById('sliderCanvasHolder');
+	var sliderDiv = canvas.children[0];
+	var sliderScaleDiv = canvas.children[1];
+	var marginsize = Number(sliderDiv.attributes['marginsize'].value);
+	var w = (marginsize+8)*2;
+	sliderDiv.style.width = width - w + 'px';
+	var width = width - w;
+	// Move sliders into new position
+	$(".track-slider").each(function(index,sliderObj){
+		var pos = holdValues[index];
+		var pix = pos * width;
+		sliderObj.style.left = pix+marginsize+'px';
+	});
+	
+	// Move scale labels
+	$(sliderScaleDiv.children).each(function(index,scaleObj){
+		var position = Number(scaleObj.attributes['value'].value);
+		var pixelPosition = (position*width)+marginsize;
+		scaleObj.style.left = Math.floor((pixelPosition-($(scaleObj).width()/2)))+'px';
+	});
+}
+
+function pageXMLSave(store, testXML)
+{
+	// Saves a specific test page
+	var xmlDoc = store;
+	// Check if any session wide metrics are enabled
+	
+	var commentShow = testXML.elementComments;
+	
+	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 audioObjects = audioEngineContext.audioObjects;
+	for (var i=0; i<audioObjects.length; i++) 
+	{
+		var audioElement = audioEngineContext.audioObjects[i].exportXMLDOM();
+		xmlDoc.appendChild(audioElement);
+	}
+	
+	$(interfaceContext.commentQuestions).each(function(index,element){
+		var node = element.exportXMLDOM();
+		xmlDoc.appendChild(node);
+	});
+	store = xmlDoc;
+}
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