title: Add Link to X-Label Chart.js
body: <p>I'm looking to be able to link the x-labels in a Chart.js <em>bar</em> chart. I've searched pretty thoroughly, and ended up trying to come up with my own solution: because the labels correspond to the bars directly above them and Chart.js has a built in <code>getBarsAtEvent(evt)</code> method, I tried creating an event if the user didn't click on a chart - this new event had <code>pageX</code> and <code>pageY</code> that was directly above the initial click such that if the user had clicked on a label, the new event would simulate a click on the bar graph. </p>
  
  <p>However, calling <code>getBarsAtEvent(createdClickEvent)</code> repeatedly gives me a <code>Uncaught TypeError ("Cannot read property 'getBoundingClientRect' of null")</code>, which must mean that the <code>getBarsAtEvent</code> method, when called on my simulated click, isn't actually returning anything. </p>
  
  <p>Any suggestions or alternate approaches would be greatly appreciated, thanks in advance.</p>