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- <!doctype html>
- <html>
- <head>
- <title>Graph | Random nodes</title>
-
- <style type="text/css">
- body {
- font: 10pt sans;
- }
- #mygraph {
- width: 600px;
- height: 600px;
- border: 1px solid lightgray;
- }
- </style>
-
- <script type="text/javascript" src="../../dist/vis.js"></script>
-
- <script type="text/javascript">
- var nodes = null;
- var edges = null;
- var graph = null;
-
-
-
- function draw() {
- nodes = [];
- edges = [];
- var connectionCount = [];
-
- // randomly create some nodes and edges
- var nodeCount = document.getElementById('nodeCount').value;
- for (var i = 0; i < nodeCount; i++) {
- nodes.push({
- id: i,
- label: String(i)
- });
-
- connectionCount[i] = 0;
-
- // create edges in a scale-free-graph way
- if (i == 1) {
- var from = i;
- var to = 0;
- edges.push({
- from: from,
- to: to
- });
- connectionCount[from]++;
- connectionCount[to]++;
- }
- else if (i > 1) {
- var conn = edges.length * 2;
- var rand = Math.floor(Math.random() * conn);
- var cum = 0;
- var j = 0;
- while (j < connectionCount.length && cum < rand) {
- cum += connectionCount[j];
- j++;
- }
-
-
- var from = i;
- var to = j;
- edges.push({
- from: from,
- to: to
- });
- connectionCount[from]++;
- connectionCount[to]++;
- }
- }
-
- // create a graph
- var container = document.getElementById('mygraph');
- var data = {
- nodes: nodes,
- edges: edges
- };
- var directionInput = document.getElementById("direction");
- var options = {
- edges: {
- },
- stabilize: false,
- hierarchicalLayout: {
- direction: directionInput.value
- }
- };
- graph = new vis.Graph(container, data, options);
-
- // add event listeners
- graph.on('select', function(params) {
- document.getElementById('selection').innerHTML = 'Selection: ' + params.nodes;
- });
- }
-
- </script>
- </head>
-
- <body onload="draw();">
- <h2>Hierarchical Layout - Scale-Free-Graph</h2>
- <div style="width:700px; font-size:14px;">
- This example shows the randomly generated <b>scale-free-graph</b> set of nodes and connected edges from example 2.
- In this example, hierarchical layout has been enabled and the vertical levels are determined automatically.
- </div>
- <br />
- <form onsubmit="draw(); return false;">
- <label for="nodeCount">Number of nodes:</label>
- <input id="nodeCount" type="text" value="25" style="width: 50px;">
- <input type="submit" value="Go">
- </form>
- <input type="button" id="btn-UD" value="Up-Down">
- <input type="button" id="btn-DU" value="Down-Up">
- <input type="button" id="btn-LR" value="Left-Right">
- <input type="button" id="btn-RL" value="Right-Left">
- <input type="hidden" id='direction' value="UD">
-
- <script language="javascript">
- var directionInput = document.getElementById("direction");
- var btnUD = document.getElementById("btn-UD");
- btnUD.onclick = function() {
- directionInput.value = "UD";
- draw();
- }
- var btnDU = document.getElementById("btn-DU");
- btnDU.onclick = function() {
- directionInput.value = "DU";
- draw();
- };
- var btnLR = document.getElementById("btn-LR");
- btnLR.onclick = function() {
- directionInput.value = "LR";
- draw();
- };
- var btnRL = document.getElementById("btn-RL");
- btnRL.onclick = function() {
- directionInput.value = "RL";
- draw();
- };
- </script>
- <br>
-
- <div id="mygraph"></div>
-
- <p id="selection"></p>
- </body>
- </html>
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