title: nvd3 capture click event on stacked area chart
body: <p>I am trying to capture click event on a nvd3 stacked area chart. I am able to capture tooltip show tooltip hide events. I want to capture click event and get the clicked point info. Please help. <a href="http://plnkr.co/edit/MJYcOBd0UT0xWYuGujDb?p=preview" rel="nofollow">PLUNKER_LINK</a></p>
  
  <p>my chart option is :</p>
  
  <pre><code>chart: {
                  type: 'stackedAreaChart',
                  height: 450,
                  x: function (d) { return d[0]; },
                  y: function (d) { return d[1]; },
                  showValues: true,
                  valueFormat: function (d) { return d3.format(',.4f')(d); },
                  dispatch: {
                      tooltipShow: function (e) { console.log('! tooltip SHOW !') },
                      tooltipHide: function (e) { console.log('! tooltip HIDE !') },
                      beforeUpdate: function (e) { console.log('! before UPDATE !') },
                      elementClick: function (e) { alert('clicked');}
  
                  }
              }
          };
  </code></pre>