genome map with dragging

forked from scresawn's block: simple genome map

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)

d3.json("data.json", function(err, mydata) {
      var g = d3.select("svg").selectAll("g")
        .data(mydata)
      	.enter()
      	.append("g")      
      	.attr("transform", function (d) {
          if (d.orientation === 'forward') {
		        return "translate(" + -(d.stop - d.start) + ",100)";
          }
          else {
		        return "translate(" + 960 + ",125)";
          }
      	});;
      
      g.transition()
      	.duration(1000)
      	.delay(function (d) { return d.start;})
      .attr("transform", function (d) {
        	console.log(d);
          if (d.orientation === 'forward') {
		        return "translate(" + d.start + ",100)";
          }
          else {
		        return "translate(" + d.start + ",125)";
          }
      	});
      	
      g.append("rect")
      	.attr("height", 50)

.attr("width", function (d) {
        	return d.stop - d.start;
      	})
      	.attr("fill", function(d) {
        	if (d.orientation == "forward") {
          	return "green";  
          }
        	else if (d.orientation == "reverse") {
            return "red";
          }	
      })
      .attr("stroke-width", 3)
      .attr("stroke", "#000000");
      g.append("text")
      .attr("x", function (d) { return (d.stop-d.start)/2})
      .attr("y", 25)
      .text(function (d) { return d.name; })
      .attr("text-anchor", "middle")
      .attr("alignment-baseline", "central");
    });

</script>
</body>

https://d3js.org/d3.v4.min.js