title: How to make labels clickable in angular-chart
body: <p>I am trying to add a click handler to the <strong>labels</strong> of a chart that was rendered by angular-chart.</p>
  
  <p>Is there a way to add an specific event handler or use the existing chart-click directive?</p>
  
  <p>At the moment the chart-click directive is returning the MouseEvent object only.</p>
  
  <p>After reading the docs I couldn't find an answer.</p>