nicholas@2: /**
nicholas@2:  *  ape.js
nicholas@2:  *  Create the APE interface
nicholas@2:  */
nicholas@2: 
nicholas@2: // Once this is loaded and parsed, begin execution
nicholas@2: loadInterface(projectXML);
nicholas@2: 
nicholas@2: function loadInterface(xmlDoc) {
nicholas@2: 	
n@16: 	// Get the dimensions of the screen available to the page
nicholas@2: 	var width = window.innerWidth;
nicholas@2: 	var height = window.innerHeight;
nicholas@2: 	
nicholas@2: 	// Set background to grey #ddd
nicholas@2: 	document.getElementsByTagName('body')[0].style.backgroundColor = '#ddd';
nicholas@2: 	
nicholas@2: 	// The injection point into the HTML page
nicholas@2: 	var insertPoint = document.getElementById("topLevelBody");
n@22: 	var testContent = document.createElement('div');
n@22: 	testContent.id = 'testContent';
nicholas@2: 	
nicholas@7: 	
nicholas@2: 	// Decode parts of the xmlDoc that are needed
nicholas@2: 	// xmlDoc MUST already be parsed by jQuery!
nicholas@2: 	var xmlSetup = xmlDoc.find('setup');
nicholas@2: 	// Should put in an error function here incase of malprocessed or malformed XML
nicholas@2: 	
nicholas@2: 	// Create the top div for the Title element
nicholas@2: 	var titleAttr = xmlSetup[0].attributes['title'];
nicholas@2: 	var title = document.createElement('div');
nicholas@2: 	title.className = "title";
nicholas@2: 	title.align = "center";
nicholas@2: 	var titleSpan = document.createElement('span');
nicholas@2: 	
nicholas@2: 	// Set title to that defined in XML, else set to default
nicholas@2: 	if (titleAttr != undefined) {
nicholas@2: 		titleSpan.innerText = titleAttr.value;
nicholas@2: 	} else {
nicholas@2: 		titleSpan.innerText =  'APE Tool';
nicholas@2: 	}
nicholas@2: 	// Insert the titleSpan element into the title div element.
nicholas@2: 	title.appendChild(titleSpan);
nicholas@2: 	
nicholas@7: 	// Store the return URL path in global projectReturn
nicholas@7: 	projectReturn = xmlSetup[0].attributes['projectReturn'].value;
nicholas@7: 	
nicholas@7: 	// Create Interface buttons!
nicholas@7: 	var interfaceButtons = document.createElement('div');
nicholas@7: 	interfaceButtons.id = 'interface-buttons';
nicholas@7: 	
nicholas@7: 	// MANUAL DOWNLOAD POINT
nicholas@7: 	// If project return is null, this MUST be specified as the location to create the download link
nicholas@7: 	var downloadPoint = document.createElement('div');
nicholas@7: 	downloadPoint.id = 'download-point';
nicholas@7: 	
nicholas@7: 	// Create playback start/stop points
nicholas@7: 	var playback = document.createElement("button");
nicholas@7: 	playback.innerText = 'Start';
n@16: 	// onclick function. Check if it is playing or not, call the correct function in the
n@16: 	// audioEngine, change the button text to reflect the next state.
nicholas@7: 	playback.onclick = function() {
nicholas@7: 		if (audioEngineContext.status == 0) {
nicholas@7: 			audioEngineContext.play();
nicholas@7: 			this.innerText = 'Stop';
nicholas@7: 		} else {
nicholas@7: 			audioEngineContext.stop();
nicholas@7: 			this.innerText = 'Start';
nicholas@7: 		}
n@16: 	};
nicholas@7: 	// Create Submit (save) button
nicholas@7: 	var submit = document.createElement("button");
nicholas@7: 	submit.innerText = 'Submit';
nicholas@7: 	submit.onclick = function() {
n@15: 		// TODO: Update this for postTest tags
nicholas@7: 		createProjectSave(projectReturn)
n@16: 	};
n@16: 	// Append the interface buttons into the interfaceButtons object.
nicholas@7: 	interfaceButtons.appendChild(playback);
nicholas@7: 	interfaceButtons.appendChild(submit);
nicholas@7: 	interfaceButtons.appendChild(downloadPoint);
nicholas@7: 	
nicholas@2: 	// Now create the slider and HTML5 canvas boxes
nicholas@2: 	
n@16: 	// Create the div box to center align
nicholas@2: 	var sliderBox = document.createElement('div');
nicholas@2: 	sliderBox.className = 'sliderCanvasDiv';
n@16: 	sliderBox.id = 'sliderCanvasHolder';
nicholas@2: 	sliderBox.align = 'center';
nicholas@2: 	
n@16: 	// Create the slider box to hold the slider elements
nicholas@5: 	var canvas = document.createElement('div');
nicholas@2: 	canvas.id = 'slider';
n@16: 	// Must have a known EXACT width, as this is used later to determine the ratings
nicholas@5: 	canvas.style.width = width - 100 +"px";
nicholas@5: 	canvas.style.height = 150 + "px";
n@16: 	canvas.style.marginBottom = "25px";
nicholas@2: 	canvas.style.backgroundColor = '#eee';
nicholas@5: 	canvas.align = "left";
nicholas@2: 	sliderBox.appendChild(canvas);
n@16: 	
n@16: 	// Global parent for the comment boxes on the page
nicholas@3: 	var feedbackHolder = document.createElement('div');
n@16: 	// Find the parent audioHolder object.
n@16: 	var audioHolder = xmlDoc.find('audioHolder');
n@16: 	audioHolder = audioHolder[0]; // Remove from one field array
n@16: 	// Extract the hostURL attribute. If not set, create an empty string.
n@16: 	var hostURL = audioHolder.attributes['hostURL'];
nicholas@7: 	if (hostURL == undefined) {
nicholas@7: 		hostURL = "";
nicholas@7: 	} else {
nicholas@7: 		hostURL = hostURL.value;
nicholas@7: 	}
n@16: 	// Extract the sampleRate. If set, convert the string to a Number.
n@16: 	var hostFs = audioHolder.attributes['sampleRate'];
n@15: 	if (hostFs != undefined) {
n@15: 		hostFs = Number(hostFs.value);
nicholas@7: 	}
nicholas@7: 	
nicholas@7: 	/// CHECK FOR SAMPLE RATE COMPATIBILITY
n@15: 	if (hostFs != undefined) {
nicholas@7: 		if (Number(hostFs) != audioContext.sampleRate) {
nicholas@7: 			var errStr = 'Sample rates do not match! Requested '+Number(hostFs)+', got '+audioContext.sampleRate+'. Please set the sample rate to match before completing this test.';
nicholas@7: 			alert(errStr);
nicholas@7: 			return;
nicholas@7: 		}
nicholas@7: 	}
n@16: 	// Find all the audioElements from the audioHolder
n@16: 	var audioElements = $(audioHolder).find('audioElements');
n@16: 	audioElements.each(function(index,element){
nicholas@7: 		// Find URL of track
n@16: 		// In this jQuery loop, variable 'this' holds the current audioElement.
n@16: 		
n@16: 		// Now load each audio sample. First create the new track by passing the full URL
nicholas@7: 		var trackURL = hostURL + this.attributes['url'].value;
nicholas@7: 		audioEngineContext.newTrack(trackURL);
n@16: 		// Create document objects to hold the comment boxes
n@16: 		var trackComment = document.createElement('div');
n@16: 		// Create a string next to each comment asking for a comment
n@16: 		var trackString = document.createElement('span');
n@16: 		trackString.innerText = 'Comment on track '+index;
n@16: 		// Create the HTML5 comment box 'textarea'
n@16: 		var trackCommentBox = document.createElement('textarea');
n@16: 		trackCommentBox.rows = '4';
n@16: 		trackCommentBox.cols = '100';
n@16: 		trackCommentBox.name = 'trackComment'+index;
n@16: 		trackCommentBox.className = 'trackComment';
n@16: 		// Add to the holder.
n@16: 		trackComment.appendChild(trackString);
n@16: 		trackComment.appendChild(trackCommentBox);
n@16: 		feedbackHolder.appendChild(trackComment);
n@16: 		
nicholas@5: 		// Create a slider per track
nicholas@5: 		
nicholas@5: 		var trackSliderObj = document.createElement('div');
nicholas@5: 		trackSliderObj.className = 'track-slider';
nicholas@5: 		trackSliderObj.id = 'track-slider-'+index;
nicholas@5: 		trackSliderObj.style.position = 'absolute';
nicholas@5: 		// Distribute it randomnly
nicholas@5: 		var w = window.innerWidth - 100;
nicholas@5: 		w = Math.random()*w;
nicholas@5: 		trackSliderObj.style.left = Math.floor(w)+50+'px';
nicholas@5: 		trackSliderObj.style.height = "150px";
nicholas@5: 		trackSliderObj.style.width = "10px";
nicholas@5: 		trackSliderObj.style.backgroundColor = 'rgb(100,200,100)';
nicholas@5: 		trackSliderObj.innerHTML = '<span>'+index+'</span>';
nicholas@5: 		trackSliderObj.style.float = "left";
nicholas@5: 		trackSliderObj.draggable = true;
nicholas@5: 		trackSliderObj.ondragend = dragEnd;
nicholas@8: 		
nicholas@8: 		// Onclick, switch playback to that track
nicholas@8: 		trackSliderObj.onclick = function() {
nicholas@8: 			// Get the track ID from the object ID
nicholas@8: 			var id = Number(this.id.substr(13,2)); // Maximum theoretical tracks is 99!
nicholas@8: 			audioEngineContext.selectedTrack(id);
n@15: 		};
nicholas@8: 		
nicholas@5: 		canvas.appendChild(trackSliderObj);
n@15: 	});
nicholas@3: 	
nicholas@2: 	
n@22: 	// Create pre and post test questions
n@22: 	
nicholas@2: 	// Inject into HTML
nicholas@2: 	insertPoint.innerHTML = null; // Clear the current schema
n@22: 	testContent.appendChild(title); // Insert the title
n@22: 	testContent.appendChild(interfaceButtons);
n@22: 	testContent.appendChild(sliderBox);
n@22: 	testContent.appendChild(feedbackHolder);
n@22: 	insertPoint.appendChild(testContent);
n@22: 	
n@22: 	var preTest = xmlDoc.find('PreTest');
n@22: 	var postTest = xmlDoc.find('PostTest');
n@22: 	preTest = preTest[0];
n@22: 	postTest = postTest[0];
n@22: 	if (preTest != undefined || postTest != undefined)
n@22: 	{
n@22: 		testContent.style.zIndex = 1;
n@22: 		var blank = document.createElement('div');
n@22: 		blank.id = 'testHalt';
n@22: 		blank.style.zIndex = 2;
n@22: 		blank.style.width = window.innerWidth + 'px';
n@22: 		blank.style.height = window.innerHeight + 'px';
n@22: 		blank.style.position = 'absolute';
n@22: 		blank.style.top = '0';
n@22: 		blank.style.left = '0';
n@22: 		insertPoint.appendChild(blank);
n@22: 	}
n@22: 	
n@22: 	// Create Pre-Test Box
n@22: 	if (preTest != undefined && preTest.children.length >= 1)
n@22: 	{
n@22: 		
n@22: 		var preTestHolder = document.createElement('div');
n@22: 		preTestHolder.id = 'preTestHolder';
n@22: 		preTestHolder.style.zIndex = 2;
n@22: 		preTestHolder.style.width = '500px';
n@22: 		preTestHolder.style.height = '250px';
n@22: 		preTestHolder.style.backgroundColor = '#fff';
n@22: 		preTestHolder.style.position = 'absolute';
n@22: 		preTestHolder.style.left = (window.innerWidth/2)-250 + 'px';
n@22: 		preTestHolder.style.top = (window.innerHeight/2)-125 + 'px';
n@22: 		// Parse the first box
n@22: 		var preTestOption = document.createElement('div');
n@22: 		preTestOption.id = 'preTest';
n@22: 		preTestOption.style.marginTop = '25px';
n@22: 		preTestOption.align = "center";
n@22: 		var child = preTest.children[0];
n@22: 		if (child.nodeName == 'statement')
n@22: 		{
n@22: 			preTestOption.innerHTML = '<span>'+child.innerHTML+'</span>';
n@22: 		} else if (child.nodeName == 'question')
n@22: 		{
n@22: 			var textHold = document.createElement('span');
n@22: 			textHold.innerHTML = child.innerHTML;
n@22: 			var textEnter = document.createElement('textarea');
n@22: 			preTestOption.appendChild(textHold);
n@22: 			preTestOption.appendChild(textEnter);
n@22: 		}
n@22: 		var nextButton = document.createElement('button');
n@22: 		nextButton.id = 'preTestNext';
n@22: 		nextButton.value = '1';
n@22: 		nextButton.innerHTML = 'next';
n@22: 		nextButton.style.position = 'relative';
n@22: 		nextButton.style.left = '450px';
n@22: 		nextButton.style.top = '175px';
n@22: 		nextButton.onclick = function() {
n@22: 			// Need to find and parse preTest again!
n@22: 			var preTest = projectXML.find('PreTest')[0];
n@22: 			if (this.value < preTest.children.length)
n@22: 			{
n@22: 				// More to process
n@22: 				var child = preTest.children[this.value];
n@22: 				if (child.nodeName == 'statement')
n@22: 				{
n@22: 					preTestOption.innerHTML = '<span>'+child.innerHTML+'</span>';
n@22: 				} else if (child.nodeName == 'question')
n@22: 				{
n@22: 					var textHold = document.createElement('span');
n@22: 					textHold.innerHTML = child.innerHTML;
n@22: 					var textEnter = document.createElement('textarea');
n@22: 					preTestOption.innerHTML = 'null';
n@22: 					preTestOption.appendChild(textHold);
n@22: 					preTestOption.appendChild(textEnter);
n@22: 				}
n@22: 			} else {
n@22: 				// Time to clear
n@22: 				preTestHolder.style.zIndex = -1;
n@22: 				preTestHolder.style.visibility = 'hidden';
n@22: 				var blank = document.getElementById('testHalt');
n@22: 				blank.style.zIndex = -2;
n@22: 				blank.style.visibility = 'hidden';
n@22: 			}
n@22: 			this.value++;
n@22: 		};
n@22: 		
n@22: 		preTestHolder.appendChild(preTestOption);
n@22: 		preTestHolder.appendChild(nextButton);
n@22: 		insertPoint.appendChild(preTestHolder);
n@22: 	}
n@22: 
nicholas@2: }
nicholas@5: 
nicholas@5: function dragEnd(ev) {
nicholas@5: 	// Function call when a div has been dropped
nicholas@5: 	if (ev.x >= 50 && ev.x < window.innerWidth-50) {
nicholas@5: 		this.style.left = (ev.x)+'px';
nicholas@5: 	} else {
nicholas@5: 		if (ev.x<50) {
nicholas@5: 			this.style.left = '50px';
nicholas@5: 		} else {
nicholas@5: 			this.style.left = window.innerWidth-50 + 'px';
nicholas@5: 		}
nicholas@5: 	}
nicholas@5: }
nicholas@7: 
nicholas@7: // Only other global function which must be defined in the interface class. Determines how to create the XML document.
nicholas@7: function interfaceXMLSave(){
nicholas@7: 	// Create the XML string to be exported with results
nicholas@7: 	var xmlDoc = document.createElement("BrowserEvaluationResult");
nicholas@7: 	var trackSliderObjects = document.getElementsByClassName('track-slider');
nicholas@7: 	var commentObjects = document.getElementsByClassName('trackComment');
nicholas@7: 	var rateMin = 50;
nicholas@7: 	var rateMax = window.innerWidth-50;
nicholas@7: 	for (var i=0; i<trackSliderObjects.length; i++)
nicholas@7: 	{
nicholas@7: 		var trackObj = document.createElement("Track");
nicholas@7: 		trackObj.id = i;
nicholas@7: 		var slider = document.createElement("Rating");
nicholas@7: 		var rate = Number(trackSliderObjects[i].style.left.substr(0,trackSliderObjects[i].style.left.length-2));
nicholas@7: 		rate = (rate-rateMin)/rateMax;
nicholas@7: 		slider.innerText = Math.floor(rate*100);
nicholas@7: 		var comment = document.createElement("Comment");
nicholas@7: 		comment.innerText = commentObjects[i].value;
nicholas@7: 		trackObj.appendChild(slider);
nicholas@7: 		trackObj.appendChild(comment);
nicholas@7: 		xmlDoc.appendChild(trackObj);
nicholas@7: 	}
nicholas@7: 	
nicholas@7: 	return xmlDoc;
nicholas@7: }
nicholas@7: