title: D3 force directed graph with drag and drop support to make selected node position fixed when dropped
body: <p>Example on a force direct graph can be found here: <a href="http://bl.ocks.org/950642">http://bl.ocks.org/950642</a></p>
  
  <p>How can I easily add support for drag and drop?
  It should set the node to fixed with current location of where it dropped it.
  It is important that rest of the nodes still uses the 'force directed mode' to position rest of the nodes in the graph automatically</p>
  
  <p><a href="https://github.com/mbostock/d3/wiki/Force-Layout">https://github.com/mbostock/d3/wiki/Force-Layout</a></p>
  
  <p>I've played around a bit without success, and wondering if anyone is able to give me a quick example on how to add such support as explained above.</p>