title: D3 incorrect drag behaviour
body: <p>This is a follow on from my previous question 
  <a href="https://stackoverflow.com/questions/46489132/d3-rect-in-one-group-interfering-with-rect-in-another-group">d3 rect in one group interfering with rect in another group</a></p>
  
  <p>Two issues:</p>
  
  <ol>
  <li><p>Incorrect drag behaviour. When clicking on the second rect to drag it, it jumps to where the third one is.</p></li>
  <li><p>I added a anonymous function which runs when the svg in clicked on anywhere. This should add a new rect. However that is the working.</p></li>
  </ol>
  
  <p>I know I should have only one issue per question but these are related and I suspect they will be solved together.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;style&gt;
    /*.active {
      stroke: #000;
      stroke-width: 2px;
    }*/
  &lt;/style&gt;
  &lt;svg width="960" height="500"&gt;&lt;/svg&gt;
  &lt;script src="//d3js.org/d3.v4.min.js"&gt;&lt;/script&gt;
  &lt;script&gt;
    var margin = {
        top: 20,
        right: 20,
        bottom: 20,
        left: 20
      },
      width = 600 - margin.left - margin.right,
      height = 600 - margin.top - margin.bottom;
  
    var svg = d3.select("svg");
  
    var data = [{
      x: 200
    }, {
      x: 300
    }, {
      x: 400
    }];
  
    var groove = svg.append("g")
      .attr("class", "groove_group");
  
    groove.append("rect")
      .attr("x", 100)
      .attr("y", 150)
      .attr("rx", 2)
      .attr("ry", 2)
      .attr("height", 6)
      .attr("width", 800)
      .style("fill", "grey");
  
    groove.append("rect")
      .attr("x", 102)
      .attr("y", 152)
      .attr("rx", 2)
      .attr("ry", 2)
      .attr("height", 2)
      .attr("width", 796)
      .style("fill", "black");
  
    // create group
    var group = svg.selectAll(null)
      .data(data)
      .enter().append("g")
      .call(d3.drag()
        .on("start", dragstarted)
        .on("drag", dragged)
        .on("end", dragended))
      .on("click", removeElement);
  
    group.append("rect")
      .attr("x", function(d) {
        return d.x;
      })
      .attr("y", 100)
      .attr("height", 100)
      .attr("width", 15)
      .style("fill", "lightblue")
      .attr('id', function(d, i) {
        return 'handle_' + i;
      })
      .attr("rx", 6)
      .attr("ry", 6)
      .attr("stroke-width", 2)
      .attr("stroke", "black");
  
    group.append("text")
      .attr("x", function(d) {
        return d.x
      })
      .attr("y", 100)
      .attr("text-anchor", "start")
      .style("fill", "black")
      .text(function(d) {
        return "x:" + d.x
      });
  
    // create group
    var group = svg.selectAll("g")
      .data(data)
      .enter().append("g")
      .call(d3.drag()
        .on("start", dragstarted)
        .on("drag", dragged)
        .on("end", dragended))
      .on("click", removeElement);
  
    group.append("rect")
      .attr("x", function(d) {
        return d.x;
      })
      .attr("y", 200)
      .attr("height", 100)
      .attr("width", 15)
      .style("fill", "lightblue")
      .attr('id', function(d, i) {
        return 'handle_' + i;
      })
      .attr("rx", 6)
      .attr("ry", 6)
      .attr("stroke-width", 2)
      .attr("stroke", "black");
  
    group.append("text")
      .attr("x", function(d) {
        return d.x
      })
      .attr("y", 200)
      .attr("text-anchor", "start")
      .style("fill", "black")
      .text(function(d) {
        return "x:" + d.x
      });
  
    svg.on("click", function() {
      var coords = d3.mouse(this);
  
      var newData = {
        x: d3.event.x,
      }
      data.push(newData);
  
      group.selectAll("rect")
        .data(data)
        .enter()
        .append("rect")
        .attr("x", function(d) {
          return d.x;
        })
        .attr("y", 200)
        .attr("height", 100)
        .attr("width", 15)
        .style("fill", "steelblue")
        .attr('id', function(d, i) {
          return 'rect_' + i;
        })
        .attr("rx", 6)
        .attr("ry", 6)
        .attr("stroke-width", 2)
        .attr("stroke", "black");
    });
  
  
    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);
      d3.select(this).select("rect")
        .attr("x", d.x = d3.event.x);
    }
  
    function dragended(d) {
      d3.select(this)
        .classed("active", false);
    }
  
    function removeElement(d) {
      d3.event.stopPropagation();
      data = data.filter(function(e) {
        return e != d;
      });
      d3.select(this)
        .remove();
    }
  &lt;/script&gt;</code></pre>
  </div>
  </div>
  </p>