Drag Group Test v4

This is an example set up to test the use of the d3.drag component.

The intention is to learn enough about d3.drag to integrate it into a sankey diagram for v4 similar to this example.

The start point was Mikes circle dragging examlpe [here] which I tried to integrate with the object+text drag implimentation here.

Tragically I can't quite work out how to grab the 'g' element and will therefore use this block as an example for a question on Stack Overflow.

EDIT: Spoiler Alert: Solved by Dragon_Slayer. Solution bl.ock here.

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.active {
  stroke: #000;
  stroke-width: 2px;
}

.rect {
  pointer-events: all;
  stroke: none;
  stroke-width: 40px;
}

</style>

<body>

var margin = {top: 10, right: 10, bottom: 30, left: 10},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var rectangles = d3.range(20).map(function() {
  return {
    x: Math.round(Math.random() * (width)),
    y: Math.round(Math.random() * (height))
  };
});

var color = d3.scaleOrdinal(d3.schemeCategory20);

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom);

var group = svg.append("g")
  .data(rectangles)
  .attr("transform", 
     "translate(" + margin.left + "," + margin.top + ")")
      .call(d3.drag()
        .on("start", dragstarted)
        .on("drag", dragged)
        .on("end", dragended));

group.selectAll("rect")
  .data(rectangles)
  .enter().append("rect")
    .attr("x", function(d) { return d.x; })
    .attr("y", function(d) { return d.y; })
    .attr("height", 60)
    .attr("width", 30)
    .style("fill", function(d, i) { return color(i); });

group.selectAll("text")
  .data(rectangles)
  .enter().append("text")
    .attr("x", function(d) { return d.x; })
    .attr("y", function(d) { return d.y; })
      .attr("text-anchor", "start")
      .style("fill", "steelblue")
      .text("Close");

function dragstarted(d) {
  d3.select(this).raise().classed("active", true);
}

function dragged(d) {
  d3.select(this).select("text").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
  d3.select(this).select("rect").attr("x", d.x = d3.event.x).attr("y", d.y = d3.event.y);
}

function dragended(d) {
  d3.select(this).classed("active", false);
}

</script>
</body>

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