Visualizations/journeys-vis.html at master · PoeticMediaLab/Visualizations · GitHub

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<!doctype html>
<html>


	<!-- copy this template into a new file to start a new project -->
	<head>
		<script type="text/javascript" src="d3/d3.v3.js"></script>
	</head>
	<body>
		<p id="remove">click here to remove a link</p>
		<p id="add">click here to add a link</p>
		<p id="timeframe">Click here to advance the timeframe</p>

		<script type="text/javascript">

			// load dataset.

			// nodes represent nodes in the drupal db.
			// links represent user motion from node to node.
			// links all have a time associated with them.

			// var dataset = {
			var	nodes = [
				{ id: "0"},
				{ id: "1" },
				{ id: "2" },
				{ id: "3" },
				{ id: "4" },
				{ id: "5" },
				{ id: "6" },
				{ id: "7" },
				{ id: "8" },
				{ id: "9" }
			];

				// using links instead of edges for name of this variable,
				// because d3 force layout calls them links.
			var links = [
				{ source: nodes[0], target: nodes[1], time: 1 },
				{ source: nodes[2], target: nodes[3], time: 7 },
				{ source: nodes[3], target: nodes[4], time: 8 },
				{ source: nodes[3], target: nodes[5], time: 9 }
			];
		// };


			var timeFrame = [0, 5];


			// set up the remove button
			d3.select("#remove")
				.on("click", function() {
					links.pop();
					start(nodes, links);
				});

			d3.select("#add")
				.on("click", function() {

					var done = true;

					do {
						var randomSource = Math.floor(Math.random() * nodes.length);
						var randomTarget = Math.floor(Math.random() * nodes.length);

						console.log("source: " + randomSource + " target: " + randomTarget);

					for(var i; i < links.length; i++) {
						if ((nodes[i].source === randomSource && nodes[i].target === randomTarget)
							||
							(nodes[i].target === randomSource && nodes[i].source === randomTarget))
							 {
								done = false;
							} 	// sending us through the loop again

						}
					} while (!done);


					links.push({source: nodes[randomSource], target: nodes[randomTarget], time: 2});
					start(nodes, links);
				});

		d3.select("#timeframe")
			.on("click", function() {
				timeFrame[1] = timeFrame[1] + 1;
				start(nodes, links);

				d3.select("#timeframe")
					.text("timeFrame[1]: " + timeFrame[1]);

			});


		// create the canvas

		var svg = d3.select("body").append("svg");

		// var controlsvg = d3.select("body").append("svg");

		var height = 500;
		var width = 500;


		svg.style("width", width)
			.style("height", height)
			.style("border", "5px black solid")
			;
/*
		controlsvg.style("width", width)
			.style("height", height)
			.style("border", "5px black solid")
			;
			*/


	// create the force layout
		var force = d3.layout.force()
			.charge(-400)
			.linkDistance(120)
			.size([width, height])
			.nodes(nodes)
			.links(links)
			.on("tick", tick)
			;

		var link = svg.selectAll(".link")
				// .data(dataset.links)
				// .enter().append("line")
				// .style("stroke", "#ccc")
				// .style("stroke-width", 3)
				;


		// function drawLinks() {
		// 	// console.log(links);
		// //   links = links.data(force.links(), function(d) { return d.source.id + "-" + d.target.id; });
  // // // console.log(links);
		// //   links.enter().append("line", ".node").attr("class", "link");
  // // links.exit().remove();
		// 	// var links = svg.selectAll("line")
		// 	// 	links.data(dataset.links)
		// 	// 		.enter().append("line")
		// 	// 	;
		// 	link = link.data(force.links())
		// 		.enter().append("line")
		// 		.style("stroke", "#ccc")
		// 		.style("stroke-width", 3)
		// 		;

		// 	// // update
		// 	link.attr("id", function(d) { return d.id; })
		// 		.style("stroke", "#ccc")
		// 		.style("stroke-width", 3);

		// 	link.exit().remove();

		// 	// tick();

		// }

		// drawLinks();

//		var node = svg.selectAll("circle")
//			.data(nodes)
//			.enter().append("circle")
//			.attr("r", 10)
//			.style("fill", "salmon")
//			.style("stroke", "#000")
//			.style("stroke-width", 2)
//			.call(force.drag)
//			;


		// necessary to get d3 to draw elements in the right order (nodes on
		// top of links, rather than under them)

		svg.append("g").attr("id", "links");
		svg.append("g").attr("id", "nodes");

		var link = svg.select("#links").selectAll(".link");
		var node = svg.select("#nodes").selectAll(".node");

		function start(nodes, links){


			// update links
			link = link.data(links, function(d) { return d.source.id + "-" + d.target.id; });

			link.enter().append("line")
				.style("stroke", "#ccc")
				.style("stroke-width", 3)
				;
			link.exit().remove();
			// update
			link.attr("id", function(d) { return d.id; });
			link.classed("link", true );

			;

			node = node.data(nodes, function(d) { return d.id;});


			node.enter().append("circle");
		    node.attr("r", 10)
				.style("fill", "salmon")
				.style("stroke", "#000")
				.style("stroke-width", 2)
				.classed("node", true)
				.call(force.drag);


			node.exit().transition()
			.style("stroke-width", 0)
			.remove();

			force.start();

		}


		// force.on("tick", tick);

		function tick() {
		  node.attr("cx", function(d) { return d.x; })
			  .attr("cy", function(d) { return d.y; })

		  link.attr("x1", function(d) { return d.source.x; })
			  .attr("y1", function(d) { return d.source.y; })
			  .attr("x2", function(d) { return d.target.x; })
			  .attr("y2", function(d) { return d.target.y; });
		}


		function selectTimeFrame(timeFrame)
		{
			var selectedLinks = [];
			for (var i = 0; i < links.length; i++) {
				if (links[i].time > timeFrame[0] &&
					links[i].time <= timeFrame[1])
				{
					selectedLinks.push(links[i]);
				}
			}
			return selectedLinks;
		}


		// dataset = selectTimeFrame(timeFrame);
		start(nodes, selectTimeFrame(timeFrame));

		// push a new link to dataset.links
		setTimeout(function () {
			links.push({source: nodes[7], target: nodes[5], time: 2});
			start(nodes, selectTimeFrame(timeFrame));
		}, 1000);

		// drawLinks();

		// start(dataset.nodes, selectTimeFrame(timeFrame));


		</script>
	</body>
<html>