title: How to disable pan for d3.behavior.zoom?
body: <p>This question looks quite similar to <a href="https://stackoverflow.com/questions/11786023/how-to-disable-double-click-zoom-for-d3-behavior-zoom">this one</a>, but I am still not able to figure out whether it is possible to use d3.behavior.zoom but without the pan ability. In other words I just want to zoom-in/out using the wheel only.</p>
  
  <p>The reason for this is that I want to be able to brush on the "zoomable" area.</p>
  
  <p>Thanks!</p>