View difference between Paste ID: uik3NSDw and i1UmLXd5

 /*Copyright (c) 2013-2016, Rob Schmuecker
  All rights reserved.
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
 
  * Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
 
  * Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
 
  * The name Rob Schmuecker may not be used to endorse or promote products
  derived from this software without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/
 
 
 // Get JSON data
 treeJSON = d3.json("flare.json", function (error, treeData) {
 
     // Calculate total nodes, max label length
     var totalNodes = 0;
     var maxLabelLength = 0;
     // variables for drag/drop
     var selectedNode = null;
     var draggingNode = null;
     // panning variables
     var panSpeed = 200;
     var panBoundary = 20; // Within 20px from edges will pan when dragging.
     // Misc. variables
     var i = 0;
     var duration = 750;
     var root;
 
     // size of the diagram
     var viewerWidth = $(document).width();
     var viewerHeight = $(document).height();
 
     var tree = d3.layout.tree()
             .size([viewerHeight, viewerWidth]);
 
     // QUA SOTTO CAMBIA L'ORIENTAMENTO DEGLI ARCHETTI!
     // define a d3 diagonal projection for use by the node paths later on.
     var diagonal = d3.svg.diagonal()
             .projection(function (d) {
                 return [d.x, d.y];
             });
 
     // A recursive helper function for performing some setup by walking through all nodes
 
     function visit(parent, visitFn, childrenFn) {
         if (!parent)
             return;
 
         visitFn(parent);
 
         var children = childrenFn(parent);
         if (children) {
             var count = children.length;
             for (var i = 0; i < count; i++) {
                 visit(children[i], visitFn, childrenFn);
             }
         }
     }
 
     // Call visit function to establish maxLabelLength
     visit(treeData, function (d) {
         totalNodes++;
         maxLabelLength = Math.max(d.name.length, maxLabelLength);
 
     }, function (d) {
         return d.children && d.children.length > 0 ? d.children : null;
     });
 
 
     // sort the tree according to the node names
 
     function sortTree() {
         tree.sort(function (a, b) {
             return b.name.toLowerCase() < a.name.toLowerCase() ? 1 : -1;
         });
     }
     // Sort the tree initially incase the JSON isn't in a sorted order.
     sortTree();
 
     // TODO: Pan function, can be better implemented.
 
     function pan(domNode, direction) {
         var speed = panSpeed;
         if (panTimer) {
             clearTimeout(panTimer);
             translateCoords = d3.transform(svgGroup.attr("transform"));
             if (direction == 'left' || direction == 'right') {
                 translateX = direction == 'left' ? translateCoords.translate[0] + speed : translateCoords.translate[0] - speed;
                 translateY = translateCoords.translate[1];
             } else if (direction == 'up' || direction == 'down') {
                 translateX = translateCoords.translate[0];
                 translateY = direction == 'up' ? translateCoords.translate[1] + speed : translateCoords.translate[1] - speed;
             }
             scaleX = translateCoords.scale[0];
             scaleY = translateCoords.scale[1];
             scale = zoomListener.scale();
             svgGroup.transition().attr("transform", "translate(" + translateX + "," + translateY + ")scale(" + scale + ")");
             d3.select(domNode).select('g.node').attr("transform", "translate(" + translateX + "," + translateY + ")");
             zoomListener.scale(zoomListener.scale());
             zoomListener.translate([translateX, translateY]);
             panTimer = setTimeout(function () {
                 pan(domNode, speed, direction);
             }, 50);
         }
     }
 
     // Define the zoom function for the zoomable tree
 
     function zoom() {
         svgGroup.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
     }
 
 
     // define the zoomListener which calls the zoom function on the "zoom" event constrained within the scaleExtents
     var zoomListener = d3.behavior.zoom().scaleExtent([0.1, 3]).on("zoom", zoom);
 
     function initiateDrag(d, domNode) {
         draggingNode = d;
         d3.select(domNode).select('.ghostCircle').attr('pointer-events', 'none');
         d3.selectAll('.ghostCircle').attr('class', 'ghostCircle show');
         d3.select(domNode).attr('class', 'node activeDrag');
 
         svgGroup.selectAll("g.node").sort(function (a, b) { // select the parent and sort the path's
             if (a.id != draggingNode.id)
                 return 1; // a is not the hovered element, send "a" to the back
             else
                 return -1; // a is the hovered element, bring "a" to the front
         });
         // if nodes has children, remove the links and nodes
         if (nodes.length > 1) {
             // remove link paths
             links = tree.links(nodes);
             nodePaths = svgGroup.selectAll("path.link")
                     .data(links, function (d) {
                         return d.target.id;
                     }).remove();
             // remove child nodes
             nodesExit = svgGroup.selectAll("g.node")
                     .data(nodes, function (d) {
                         return d.id;
                     }).filter(function (d, i) {
                 if (d.id == draggingNode.id) {
                     return false;
                 }
                 return true;
             }).remove();
         }
 
         // remove parent link
         parentLink = tree.links(tree.nodes(draggingNode.parent));
         svgGroup.selectAll('path.link').filter(function (d, i) {
             if (d.target.id == draggingNode.id) {
                 return true;
             }
             return false;
         }).remove();
 
         dragStarted = null;
     }
 
     // define the baseSvg, attaching a class for styling and the zoomListener
     var baseSvg = d3.select("#tree-container").append("svg")
             .attr("width", viewerWidth)
             .attr("height", viewerHeight)
             .attr("class", "overlay")
             .call(zoomListener);
 
 
     // Define the drag listeners for drag/drop behaviour of nodes.
     dragListener = d3.behavior.drag()
             .on("dragstart", function (d) {
                 if (d == root) {
                     return;
                 }
                 dragStarted = true;
                 nodes = tree.nodes(d);
                 d3.event.sourceEvent.stopPropagation();
                 // it's important that we suppress the mouseover event on the node being dragged. Otherwise it will absorb the mouseover event and the underlying node will not detect it d3.select(this).attr('pointer-events', 'none');
             })
             .on("drag", function (d) {
                 if (d == root) {
                     return;
                 }
                 if (dragStarted) {
                     domNode = this;
                     initiateDrag(d, domNode);
                 }
 
                 // get coords of mouseEvent relative to svg container to allow for panning
                 relCoords = d3.mouse($('svg').get(0));
                 if (relCoords[0] < panBoundary) {
                     panTimer = true;
                     pan(this, 'left');
                 } else if (relCoords[0] > ($('svg').width() - panBoundary)) {
 
                     panTimer = true;
                     pan(this, 'right');
                 } else if (relCoords[1] < panBoundary) {
                     panTimer = true;
                     pan(this, 'up');
                 } else if (relCoords[1] > ($('svg').height() - panBoundary)) {
                     panTimer = true;
                     pan(this, 'down');
                 } else {
                     try {
                         clearTimeout(panTimer);
                     } catch (e) {
 
                     }
                 }
 
                 d.x0 += d3.event.dy;
                 d.y0 += d3.event.dx;
                 var node = d3.select(this);
                 node.attr("transform", "translate(" + d.x0 + "," + d.y0 + ")");
                 updateTempConnector();
             }).on("dragend", function (d) {
         if (d == root) {
             return;
         }
         domNode = this;
         if (selectedNode) {
             // now remove the element from the parent, and insert it into the new elements children
             var index = draggingNode.parent.children.indexOf(draggingNode);
             if (index > -1) {
                 draggingNode.parent.children.splice(index, 1);
             }
             if (typeof selectedNode.children !== 'undefined' || typeof selectedNode._children !== 'undefined') {
                 if (typeof selectedNode.children !== 'undefined') {
                     selectedNode.children.push(draggingNode);
                 } else {
                     selectedNode._children.push(draggingNode);
                 }
             } else {
                 selectedNode.children = [];
                 selectedNode.children.push(draggingNode);
             }
             // Make sure that the node being added to is expanded so user can see added node is correctly moved
             expand(selectedNode);
             sortTree();
             endDrag();
         } else {
             endDrag();
         }
     });
 
     function endDrag() {
         selectedNode = null;
         d3.selectAll('.ghostCircle').attr('class', 'ghostCircle');
         d3.select(domNode).attr('class', 'node');
         // now restore the mouseover event or we won't be able to drag a 2nd time
         d3.select(domNode).select('.ghostCircle').attr('pointer-events', '');
         updateTempConnector();
         if (draggingNode !== null) {
             update(root);
             centerNode(draggingNode);
             draggingNode = null;
         }
     }
 
     // Helper functions for collapsing and expanding nodes.
 
     function collapse(d) {
         if (d.children) {
             d._children = d.children;
             d._children.forEach(collapse);
             d.children = null;
         }
     }
 
     function expand(d) {
         if (d._children) {
             d.children = d._children;
             d.children.forEach(expand);
             d._children = null;
         }
     }
 
     var overCircle = function (d) {
         selectedNode = d;
         updateTempConnector();
     };
     var outCircle = function (d) {
         selectedNode = null;
         updateTempConnector();
     };
 
     // Function to update the temporary connector indicating dragging affiliation
     var updateTempConnector = function () {
         var data = [];
         if (draggingNode !== null && selectedNode !== null) {
             // have to flip the source coordinates since we did this for the existing connectors on the original tree
             data = [{
                     source: {
                         x: selectedNode.y0,
                         y: selectedNode.x0
                     },
                     target: {
                         x: draggingNode.y0,
                         y: draggingNode.x0
                     }
                 }];
         }
         var link = svgGroup.selectAll(".templink").data(data);
 
         link.enter().append("path")
                 .attr("class", "templink")
                 .attr("d", d3.svg.diagonal())
                 .attr('pointer-events', 'none');
 
         link.attr("d", d3.svg.diagonal());
 
         link.exit().remove();
     };
 
     // Function to center node when clicked/dropped so node doesn't get lost when collapsing/moving with large amount of children.
 
     function centerNode(source) {
         scale = zoomListener.scale();
         x = -source.y0;
         y = -source.x0;
         x = x * scale + viewerWidth / 2;
         y = y * scale + viewerHeight / 2;
         d3.select('g').transition()
                 .duration(duration)
                 .attr("transform", "translate(" + x + "," + y + ")scale(" + scale + ")");
         zoomListener.scale(scale);
         zoomListener.translate([x, y]);
     }
 
     // Toggle children function
 
     function toggleChildren(d) {
         if (d.children) {
             d._children = d.children;
             d.children = null;
         } else if (d._children) {
             d.children = d._children;
             d._children = null;
         }
         return d;
     }
 
     // Toggle children on click.
 
     function click(d) {
         if (d3.event.defaultPrevented)
             return; // click suppressed
 
         console.log(d3.select(this).select('text').html());
 
         d3.select(this).append('span').attr('class', 'ok3');
 
         document.getElementById('ok1').innerHTML = d3.select(this).select('text').html();
         document.getElementById('ok1').style.visibility = 'visible';
         d = toggleChildren(d);
         update(d);
         centerNode(d);
     }
 
     function update(source) {
         // Compute the new height, function counts total children of root node and sets tree height accordingly.
         // This prevents the layout looking squashed when new nodes are made visible or looking sparse when nodes are removed
         // This makes the layout more consistent.
         var levelWidth = [1];
         var childCount = function (level, n) {
 
             if (n.children && n.children.length > 0) {
                 if (levelWidth.length <= level + 1)
                     levelWidth.push(0);
 
                 levelWidth[level + 1] += n.children.length;
                 n.children.forEach(function (d) {
                     childCount(level + 1, d);
                 });
             }
         };
         childCount(0, root);
         var newHeight = d3.max(levelWidth) * 25; // 25 pixels per line
         tree = tree.size([newHeight, viewerWidth]);
 
         // Compute the new tree layout.
         var nodes = tree.nodes(root).reverse(),
                 links = tree.links(nodes);
 
         // Set widths between levels based on maxLabelLength.
         nodes.forEach(function (d) {
             d.y = (d.depth * (maxLabelLength * 10)); //maxLabelLength * 10px
             // alternatively to keep a fixed scale one can set a fixed depth per level
             // Normalize for fixed-depth by commenting out below line
             // d.y = (d.depth * 500); //500px per level.
         });
 
         // Update the nodes…
         node = svgGroup.selectAll("g.node")
                 .data(nodes, function (d) {
                     return d.id || (d.id = ++i);
                 });
 
         // Enter any new nodes at the parent's previous position.
         var nodeEnter = node.enter().append("g")
                 .call(dragListener)
                 .attr("class", "node")
                 .attr("transform", function (d) {
                     return "translate(" + source.x0 + "," + source.y0 + ")";
                 })
                 .on('click', click);
 
         nodeEnter.append("circle")
                 .attr('class', 'nodeCircle')
                 .attr("r", 0)
                 .style("fill", function (d) {
                     return d._children ? "lightsteelblue" : "#fff";
                 });
 
         nodeEnter.append("text")
                 .attr("x", function (d) {
                     return d.children || d._children ? -10 : 10;
                 })
                 .attr("dy", ".35em")
                 .attr('class', 'nodeText')
                 .attr("text-anchor", function (d) {
                     return d.children || d._children ? "end" : "start";
                 })
                 .text(function (d) {
                     return d.name;
                 })
                 .style("fill-opacity", 0);
 
         // phantom node to give us mouseover in a radius around it
         nodeEnter.append("circle")
                 .attr('class', 'ghostCircle')
                 .attr("r", 30)
                 .attr("opacity", 0.2) // change this to zero to hide the target area
                 .style("fill", "red")
                 .attr('pointer-events', 'mouseover')
                 .on("mouseover", function (node) {
                     overCircle(node);
                 })
                 .on("mouseout", function (node) {
                     outCircle(node);
                 });
 
         // Update the text to reflect whether node has children or not.
         node.select('text')
                 .attr("x", function (d) {
                     return d.children || d._children ? -10 : 10;
                 })
                 .attr("text-anchor", function (d) {
                     return d.children || d._children ? "end" : "start";
                 })
                 .text(function (d) {
                     return d.name;
                 });
 
         // Change the circle fill depending on whether it has children and is collapsed
         node.select("circle.nodeCircle")
                 .attr("r", 4.5)
                 .style("fill", function (d) {
                     return d._children ? "lightsteelblue" : "#fff";
                 });
 
         // Transition nodes to their new position.
         var nodeUpdate = node.transition()
                 .duration(duration)
                 .attr("transform", function (d) {
                     return "translate(" + d.x + "," + d.y + ")";
                 });
 
         // Fade the text in
         nodeUpdate.select("text")
                 .style("fill-opacity", 1);
 
         // Transition exiting nodes to the parent's new position.
         var nodeExit = node.exit().transition()
                 .duration(duration)
                 .attr("transform", function (d) {
                     return "translate(" + source.x + "," + source.y + ")";
                 })
                 .remove();
 
         nodeExit.select("circle")
                 .attr("r", 0);
 
         nodeExit.select("text")
                 .style("fill-opacity", 0);
 
         // Update the links…
         var link = svgGroup.selectAll("path.link")
                 .data(links, function (d) {
                     return d.target.id;
                 });
 
         // Enter any new links at the parent's previous position.
         link.enter().insert("path", "g")
                 .attr("class", "link")
                 .attr("d", function (d) {
                     var o = {
                         x: source.x0,
                         y: source.y0
                     };
                     return diagonal({
                         source: o,
                         target: o
                     });
                 });
 
         // Transition links to their new position.
         link.transition()
                 .duration(duration)
                 .attr("d", diagonal);
 
         // Transition exiting nodes to the parent's new position.
         link.exit().transition()
                 .duration(duration)
                 .attr("d", function (d) {
                     var o = {
                         x: source.x,
                         y: source.y
                     };
                     return diagonal({
                         source: o,
                         target: o
                     });
                 })
                 .remove();
 
         // Stash the old positions for transition.
         nodes.forEach(function (d) {
             d.x0 = d.x;
             d.y0 = d.y;
         });
     }
 
     // Append a group which holds all nodes and which the zoom Listener can act upon.
     var svgGroup = baseSvg.append("g");
 
     // Define the root
     root = treeData;
     root.x0 = viewerHeight / 2;
     root.y0 = 0;
 
     // Layout the tree initially and center on the root node.
     update(root);
     centerNode(root);
 });