comparison interfaces/discrete.js @ 1088:3705f68a38b7

The version I use and works, addresses issues #1622, #1616, partially #1620

+// Once this is loaded and parsed, begin execution
+loadInterface();
+
+function loadInterface() {
+	// Use this to do any one-time page / element construction. For instance, placing any stationary text objects,
+	// holding div's, or setting up any nodes which are present for the entire test sequence
+	
+	// The injection point into the HTML page
+	interfaceContext.insertPoint = document.getElementById("topLevelBody");
+	var testContent = document.createElement('div');
+	testContent.id = 'testContent';
+	
+	// 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';
+	interfaceButtons.style.height = '25px';
+	
+	// Create playback start/stop points
+	var playback = document.createElement("button");
+	playback.innerHTML = 'Stop';
+	playback.id = 'playback-button';
+	playback.style.float = 'left';
+	// 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';
+	submit.style.float = 'left';
+	// Append the interface buttons into the interfaceButtons object.
+	interfaceButtons.appendChild(playback);
+	interfaceButtons.appendChild(submit);
+	
+	// Create a slider box
+	var sliderBox = document.createElement('div');
+	sliderBox.style.width = "100%";
+	sliderBox.style.height = window.innerHeight - 200+12 + 'px';
+	sliderBox.style.marginBottom = '10px';
+	sliderBox.id = 'slider';
+	var scaleHolder = document.createElement('div');
+	scaleHolder.id = "scale-holder";
+	scaleHolder.style.marginLeft = "107px";
+	sliderBox.appendChild(scaleHolder);
+	var scaleText = document.createElement('div');
+	scaleText.id = "scale-text-holder";
+	scaleText.style.height = "25px";
+	scaleText.style.width = "100%";
+	scaleHolder.appendChild(scaleText);
+	var scaleCanvas = document.createElement('canvas');
+	scaleCanvas.id = "scale-canvas";
+	scaleCanvas.style.marginLeft = "150px";
+	scaleHolder.appendChild(scaleCanvas);
+	var sliderObjectHolder = document.createElement('div');
+	sliderObjectHolder.id = 'slider-holder';
+	sliderObjectHolder.align = "center";
+	sliderBox.appendChild(sliderObjectHolder);
+	
+	// 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(page)
+{
+	// Called each time a new test page is to be build. The page specification node is the only item passed in
+	var id = page.id;
+	
+	var feedbackHolder = document.getElementById('feedbackHolder');
+    feedbackHolder.innerHTML = null;
+	var interfaceObj = page.interfaces;
+	if (interfaceObj.length > 1)
+	{
+		console.log("WARNING - This interface only supports one <interface> node per page. Using first interface node");
+	}
+	interfaceObj = interfaceObj[0];
+	if(interfaceObj.title != null)
+	{
+		document.getElementById("pageTitle").textContent = interfaceObj.title;
+	}
+    
+    var interfaceOptions = specification.interfaces.options.concat(interfaceObj.options);
+    for (var option of interfaceOptions)
+    {
+        if (option.type == "show")
+        {
+            switch(option.name) {
+                case "playhead":
+                    var playbackHolder = document.getElementById('playback-holder');
+                    if (playbackHolder == null)
+                    {
+                        playbackHolder = document.createElement('div');
+                        playbackHolder.style.width = "100%";
+                        playbackHolder.align = 'center';
+                        playbackHolder.appendChild(interfaceContext.playhead.object);
+                        feedbackHolder.appendChild(playbackHolder);
+                    }
+                    break;
+                case "page-count":
+                    var pagecountHolder = document.getElementById('page-count');
+                    if (pagecountHolder == null)
+                    {
+                        pagecountHolder = document.createElement('div');
+                        pagecountHolder.id = 'page-count';
+                    }
+                    pagecountHolder.innerHTML = '<span>Page '+(page.presentedId+1)+' of '+specification.pages.length+'</span>';
+                    var inject = document.getElementById('interface-buttons');
+                    inject.appendChild(pagecountHolder);
+                    break;
+                case "volume":
+                    if (document.getElementById('master-volume-holder') == null)
+                    {
+                        feedbackHolder.appendChild(interfaceContext.volume.object);
+                    }
+                    break;
+            }
+        }
+    }
+	
+	// Delete outside reference
+	var outsideReferenceHolder = document.getElementById('outside-reference');
+	if (outsideReferenceHolder != null) {
+		document.getElementById('interface-buttons').removeChild(outsideReferenceHolder);
+	}
+	
+	var sliderBox = document.getElementById('slider-holder');
+	sliderBox.innerHTML = null;
+	
+	var commentBoxPrefix = "Comment on track";
+	if (interfaceObj.commentBoxPrefix != undefined) {
+		commentBoxPrefix = interfaceObj.commentBoxPrefix;
+	}
+	var loopPlayback = page.loop;
+	
+	$(page.commentQuestions).each(function(index,element) {
+		var node = interfaceContext.createCommentQuestion(element);
+		feedbackHolder.appendChild(node.holder);
+	});
+	
+	// Find all the audioElements from the audioHolder
+	var label = 0;
+	var interfaceScales = testState.currentStateMap.interfaces[0].scales;
+	$(page.audioElements).each(function(index,element){
+		// Find URL of track
+		// In this jQuery loop, variable 'this' holds the current audioElement.
+		
+		var audioObject = audioEngineContext.newTrack(element);
+		if (element.type == 'outside-reference')
+		{
+			// Construct outside reference;
+			var orNode = new outsideReferenceDOM(audioObject,index,document.getElementById('interface-buttons'));
+			audioObject.bindInterface(orNode);
+		} else {
+			// Create a slider per track
+			var sliderObj = new discreteObject(audioObject,label,interfaceScales);
+			sliderBox.appendChild(sliderObj.holder);
+			audioObject.bindInterface(sliderObj);
+            interfaceContext.createCommentBox(audioObject);
+			label += 1;
+		}
+        
+	});
+	
+    if (page.showElementComments)
+    {
+        interfaceContext.showCommentBoxes(feedbackHolder,true);
+    }
+    
+	// Auto-align
+	resizeWindow(null);
+}
+
+function discreteObject(audioObject,label,interfaceScales)
+{
+	// An example node, you can make this however you want for each audioElement.
+	// However, every audioObject (audioEngineContext.audioObject) MUST have an interface object with the following
+	// You attach them by calling audioObject.bindInterface( )
+	if (interfaceScales == null || interfaceScales.length == 0)
+	{
+		console.log("WARNING: The discrete radio's are built depending on the number of scale points specified! Ensure you have some specified. Defaulting to 5 for now!");
+		numOptions = 5;
+	}
+	this.parent = audioObject;
+	
+	this.holder = document.createElement('div');
+	this.title = document.createElement('div');
+	this.discreteHolder = document.createElement('div');
+	this.discretes = [];
+	this.play = document.createElement('button');
+	
+	this.holder.className = 'track-slider';
+	this.holder.style.width = window.innerWidth-200 + 'px';
+	this.holder.appendChild(this.title);
+	this.holder.appendChild(this.discreteHolder);
+	this.holder.appendChild(this.play);
+	this.holder.setAttribute('trackIndex',audioObject.id);
+	this.title.textContent = label;
+	this.title.className = 'track-slider-title';
+	
+	this.discreteHolder.className = "track-slider-range";
+	this.discreteHolder.style.width = window.innerWidth-500 + 'px';
+	for (var i=0; i<interfaceScales.length; i++)
+	{
+		var node = document.createElement('input');
+		node.setAttribute('type','radio');
+		node.className = 'track-radio';
+        node.disabled = true;
+		node.setAttribute('position',interfaceScales[i].position);
+		node.setAttribute('name',audioObject.specification.id);
+		node.setAttribute('id',audioObject.specification.id+'-'+String(i));
+		this.discretes.push(node);
+		this.discreteHolder.appendChild(node);
+		node.onclick = function(event)
+		{
+			if (audioEngineContext.status == 0)
+			{
+				event.currentTarget.checked = false;
+				return;
+			}
+			var time = audioEngineContext.timer.getTestTime();
+			var id = Number(event.currentTarget.parentNode.parentNode.getAttribute('trackIndex'));
+			var value = event.currentTarget.getAttribute('position') / 100.0;
+			audioEngineContext.audioObjects[id].metric.moved(time,value);
+			console.log('slider '+id+' moved to '+value+' ('+time+')');
+		};
+	}
+	
+	this.play.className = 'track-slider-button';
+	this.play.textContent = "Loading...";
+	this.play.value = audioObject.id;
+	this.play.disabled = true;
+    this.play.setAttribute("playstate","ready");
+	this.play.onclick = function(event)
+	{
+		var id = Number(event.currentTarget.value);
+		//audioEngineContext.metric.sliderPlayed(id);
+        if (event.currentTarget.getAttribute("playstate") == "ready")
+            audioEngineContext.play(id);
+        else if (event.currentTarget.getAttribute("playstate") == "playing")
+            audioEngineContext.stop();
+	};
+	this.resize = function(event)
+	{
+		this.holder.style.width = window.innerWidth-200 + 'px';
+		this.discreteHolder.style.width = window.innerWidth-500 + 'px';
+		//text.style.left = (posPix+150-($(text).width()/2)) +'px';
+		for (var i=0; i<this.discretes.length; i++)
+		{
+			var width = $(this.discreteHolder).width() - 20;
+			var node = this.discretes[i];
+			var nodeW = $(node).width();
+			var position = node.getAttribute('position');
+			var posPix = Math.round(width * (position / 100.0));
+			node.style.left = (posPix+10 - (nodeW/2)) + 'px';
+		}
+	};
+	this.enable = function()
+	{
+		// This is used to tell the interface object that playback of this node is ready
+		this.play.disabled = false;
+		this.play.textContent = "Play";
+		$(this.slider).removeClass('track-slider-disabled');
+        for (var radio of this.discretes)
+        {
+            radio.disabled = false;
+        }
+	};
+	this.updateLoading = function(progress)
+	{
+		// progress is a value from 0 to 100 indicating the current download state of media files
+        if (progress != 100)
+        {
+            progress = String(progress);
+            progress = progress.split('.')[0];
+            this.play.textContent = progress+'%';
+        } else {
+            this.play.textContent = "Play";
+        }
+	};
+    
+    this.startPlayback = function()
+    {
+        // Called by audioObject when playback begins
+        this.play.setAttribute("playstate","playing");
+        $(".track-slider").removeClass('track-slider-playing');
+		$(this.holder).addClass('track-slider-playing');
+		var outsideReference = document.getElementById('outside-reference');
+        this.play.textContent = "Listening";
+		if (outsideReference != null) {
+			$(outsideReference).removeClass('track-slider-playing');
+		}
+    }
+    this.stopPlayback = function()
+    {
+        // Called by audioObject when playback stops
+        this.play.setAttribute("playstate","ready");
+        $(this.holder).removeClass('track-slider-playing');
+        this.play.textContent = "Play";
+    }
+    
+	this.getValue = function()
+	{
+		// Return the current value of the object. If there is no value, return -1
+		var value = -1;
+		for (var i=0; i<this.discretes.length; i++)
+		{
+			if (this.discretes[i].checked == true)
+			{
+				value = this.discretes[i].getAttribute('position') / 100.0;
+				break;
+			}
+		}
+		return value;
+	};
+	this.getPresentedId = function()
+	{
+		// Return the presented ID of the object. For instance, the APE has sliders starting from 0. Whilst AB has alphabetical scale
+		return this.title.textContent;
+	};
+	this.canMove = function()
+	{
+		// Return either true or false if the interface object can be moved. AB / Reference cannot, whilst sliders can and therefore have a continuous scale.
+		// These are checked primarily if the interface check option 'fragmentMoved' is enabled.
+		return true;
+	};
+	this.exportXMLDOM = function(audioObject) {
+		// Called by the audioObject holding this element to export the interface <value> node.
+		// If there is no value node (such as outside reference), return null
+		// If there are multiple value nodes (such as multiple scale / 2D scales), return an array of nodes with each value node having an 'interfaceName' attribute
+		// Use storage.document.createElement('value'); to generate the XML node.
+		var node = storage.document.createElement('value');
+		node.textContent = this.getValue();
+		return node;
+	};
+};
+
+function resizeWindow(event)
+{
+	// Called on every window resize event, use this to scale your page properly
+	var numObj = document.getElementsByClassName('track-slider').length;
+	var totalHeight = (numObj * 66)-30;
+	document.getElementById('scale-holder').style.width = window.innerWidth-220 + 'px';
+	var canvas = document.getElementById('scale-canvas');
+	canvas.width = window.innerWidth-520;
+	canvas.height = totalHeight;
+	for (var i in audioEngineContext.audioObjects)
+	{
+		if (audioEngineContext.audioObjects[i].specification.type != 'outside-reference'){
+			audioEngineContext.audioObjects[i].interfaceDOM.resize(event);
+		}
+	}
+    document.getElementById('slider-holder').style.height = totalHeight + 'px';
+    document.getElementById('slider').style.height = totalHeight + 70 + 'px';
+	drawScale();
+}
+
+function drawScale()
+{
+	var interfaceObj = testState.currentStateMap.interfaces[0];
+	var scales = testState.currentStateMap.interfaces[0].scales;
+	scales = scales.sort(function(a,b) {
+		return a.position - b.position;
+	});
+	var canvas = document.getElementById('scale-canvas');
+	var ctx = canvas.getContext("2d");
+	var height = canvas.height;
+	var width = canvas.width;
+	var textHolder = document.getElementById('scale-text-holder');
+	textHolder.innerHTML = null;
+	ctx.fillStyle = "#000000";
+	ctx.setLineDash([1,4]);
+	for (var scale of scales)
+	{
+		var posPercent = scale.position / 100.0;
+		var posPix = Math.round(width * posPercent);
+		if(posPix<=0){posPix=1;}
+		if(posPix>=width){posPix=width-1;}
+		ctx.moveTo(posPix,0);
+		ctx.lineTo(posPix,height);
+		ctx.stroke();
+		
+		var text = document.createElement('div');
+		text.align = "center";
+		var textC = document.createElement('span');
+		textC.textContent = scale.text;
+		text.appendChild(textC);
+		text.className = "scale-text";
+		textHolder.appendChild(text);
+		text.style.width = $(text.children[0]).width()+'px';
+		text.style.left = (posPix+150-($(text).width()/2)) +'px';
+	}
+}
+
+function buttonSubmitClick() // TODO: Only when all songs have been played!
+{
+	var checks = [];
+	checks = checks.concat(testState.currentStateMap.interfaces[0].options);
+	checks = checks.concat(specification.interfaces.options);
+	var canContinue = true;
+	
+	// Check that the anchor and reference objects are correctly placed
+	if (interfaceContext.checkHiddenAnchor() == false) {return;}
+	if (interfaceContext.checkHiddenReference() == false) {return;}
+	
+	for (var i=0; i<checks.length; i++) {
+		if (checks[i].type == 'check')
+		{
+			switch(checks[i].name) {
+			case 'fragmentPlayed':
+				// Check if all fragments have been played
+				var checkState = interfaceContext.checkAllPlayed();
+				if (checkState == false) {canContinue = false;}
+				break;
+			case  'fragmentFullPlayback':
+				// Check all fragments have been played to their full length
+				var checkState = interfaceContext.checkAllPlayed();
+				if (checkState == false) {canContinue = false;}
+				console.log('NOTE: fragmentFullPlayback not currently implemented, performing check fragmentPlayed instead');
+				break;
+			case 'fragmentMoved':
+				// Check all fragment sliders have been moved.
+				var checkState = interfaceContext.checkAllMoved();
+				if (checkState == false) {canContinue = false;}
+				break;
+			case 'fragmentComments':
+				// Check all fragment sliders have been moved.
+				var checkState = interfaceContext.checkAllCommented();
+				if (checkState == false) {canContinue = false;}
+				break;
+			//case 'scalerange':
+				// Check the scale is used to its full width outlined by the node
+				//var checkState = interfaceContext.checkScaleRange();
+				//if (checkState == false) {canContinue = false;}
+			//	break;
+			default:
+				console.log("WARNING - Check option "+checks[i].check+" is not supported on this interface");
+				break;
+			}
+
+		}
+		if (!canContinue) {break;}
+	}
+	
+    if (canContinue) {
+	    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();
+    } 
+}
+
+function pageXMLSave(store, pageSpecification)
+{
+	// MANDATORY
+	// Saves a specific test page
+	// You can use this space to add any extra nodes to your XML <audioHolder> saves
+	// Get the current <page> information in store (remember to appendChild your data to it)
+	// pageSpecification is the current page node configuration
+	// To create new XML nodes, use storage.document.createElement();
+}