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+/* ------------------------------------------------------------------------------
+ *
+ *  # D3.js - cluster dendrogram
+ *
+ *  Demo of cluster dendrogram setup in cartesian orientation
+ *
+ *  Version: 1.0
+ *  Latest update: August 1, 2015
+ *
+ * ---------------------------------------------------------------------------- */
+
+$(function () {
+
+    // Initialize chart
+    treeCluster('#d3-tree-dendrogram', 800);
+
+    // Chart setup
+    function treeCluster(element, height) {
+
+
+        // Basic setup
+        // ------------------------------
+
+        // Define main variables
+        var d3Container = d3.select(element),
+            margin = {top: 0, right: 0, bottom: 0, left: 40},
+            width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right,
+            height = height - margin.top - margin.bottom - 5;
+
+
+
+        // Create chart
+        // ------------------------------
+
+        // Add SVG element
+        var container = d3Container.append("svg");
+
+        // Add SVG group
+        var svg = container
+            .attr("width", width + margin.left + margin.right)
+            .attr("height", height + margin.top + margin.bottom)
+            .append("g")
+                .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
+
+
+
+        // Construct chart layout
+        // ------------------------------
+
+        // Cluster
+        var cluster = d3.layout.cluster()
+            .size([height, width - 180]);
+
+        // Diagonal projection
+        var diagonal = d3.svg.diagonal()
+            .projection(function(d) { return [d.y, d.x]; });
+
+
+
+        // Load data
+        // ------------------------------
+
+        d3.json("assets/demo_data/d3/tree/tree_data_dendrogram.json", function(error, root) {
+
+            var nodes = cluster.nodes(root),
+                links = cluster.links(nodes);
+
+
+            // Links
+            // ------------------------------
+
+            // Append link group
+            var linkGroup = svg.append("g")
+                .attr("class", "d3-tree-link-group");
+
+            // Append link path
+            var link = linkGroup.selectAll(".d3-tree-link")
+                .data(links)
+                .enter()
+                .append("path")
+                    .attr("class", "d3-tree-link")
+                    .style("fill", "none")
+                    .style("stroke", "#ddd")
+                    .style("stroke-width", 1.5)
+                    .attr("d", diagonal);
+
+
+            // Nodes
+            // ------------------------------
+
+            // Append node group
+            var nodeGroup = svg.append("g")
+                .attr("class", "d3-tree-node-group");
+
+            // Append node
+            var node = nodeGroup.selectAll(".d3-tree-node")
+                .data(nodes)
+                .enter()
+                .append("g")
+                    .attr("class", "d3-tree-node")
+                    .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })
+
+            // Append node circles
+            node.append("circle")
+                .style("fill", "#fff")
+                .style("stroke", "#2196F3")
+                .style("stroke-width", 1.5)
+                .attr("r", 4.5);
+
+            // Append node text
+            var text = node.append("text")
+                .attr("dx", function(d) { return d.children ? -10 : 10; })
+                .attr("dy", 4)
+                .style("text-anchor", function(d) { return d.children ? "end" : "start"; })
+                .style("font-size", 12)
+                .style("background-color", "#fff")
+                .text(function(d) { return d.name; });
+
+
+
+            // Resize chart
+            // ------------------------------
+
+            // Call function on window resize
+            $(window).on('resize', resize);
+
+            // Call function on sidebar width change
+            $('.sidebar-control').on('click', resize);
+
+
+            // Resize function
+            // 
+            // Since D3 doesn't support SVG resize by default,
+            // we need to manually specify parts of the graph that need to 
+            // be updated on window resize
+            function resize() {
+
+                // Layout variables
+                width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right,
+                nodes = cluster.nodes(root),
+                links = cluster.links(nodes);
+
+                // Layout
+                // -------------------------
+
+                // Main svg width
+                container.attr("width", width + margin.left + margin.right);
+
+                // Width of appended group
+                svg.attr("width", width + margin.left + margin.right);
+
+
+                // Tree size
+                cluster.size([height, width - 180]);
+
+
+                // Chart elements
+                // -------------------------
+
+                // Link paths
+                svg.selectAll(".d3-tree-link").attr("d", diagonal)
+
+                // Node paths
+                svg.selectAll(".d3-tree-node").attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
+            }
+        });
+    }
+});