title: Adding a horizontal and vertical scroll bar for d3-2way-tree for multilevel tree
body: <p>I was referring to d3 widget, <a href="http://bl.ocks.org/kanesee/5d6c48bffd4ea31201fb" rel="nofollow noreferrer">http://bl.ocks.org/kanesee/5d6c48bffd4ea31201fb</a> . I want the tree to be grown further more both at the top and bottom, As the page canvas is fixed I want to add scroll bars so that when the graph grows i should be able to see the chart completely.</p>
  
  <pre><code>{
      "name": "Heirachy",
      "parents": [
          {
              "name": "Parent1",
              "isparent": true
          },
          {
              "name": "Parent2",
              "isparent": true
          },
          {
              "name": "Parent3",
              "isparent": true,
              "parents": [
                  { 
                      "name" : "inner-parent3",
                      "isparent" : true,
                      "parents":[
                          {
                              "name" : "inner-most-parent3",
                              "isparent" : true
                          }
                      ]
                  },
                  { 
                      "name" : "outer-parent3",
                      "isparent" : true
                  }
              ]
          }
      ],
      "children": [
          {
              "name": "Childern1",
              "isparent": false
          },
          {
              "name": "Childern2",
              "isparent": false
          },
          {
              "name": "Childern3",
              "isparent": false,
              "children": [
                  { 
                      "name" : "inner-1-children3",
                      "isparent" : false
                  },
                  { 
                      "name" : "inner-2-children3",
                      "isparent" : false
                  }
              ]
          },
          {
              "name": "Childern4",
              "isparent": false
          }
      ]
  }
  </code></pre>
  
  <p>This my json data, it makes tree to grow vertically.</p>